WO2004081243A1 - 白金族元素の回収法 - Google Patents
白金族元素の回収法 Download PDFInfo
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- WO2004081243A1 WO2004081243A1 PCT/JP2004/003237 JP2004003237W WO2004081243A1 WO 2004081243 A1 WO2004081243 A1 WO 2004081243A1 JP 2004003237 W JP2004003237 W JP 2004003237W WO 2004081243 A1 WO2004081243 A1 WO 2004081243A1
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- group element
- oxide
- molten metal
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B11/00—Obtaining noble metals
- C22B11/02—Obtaining noble metals by dry processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J38/00—Regeneration or reactivation of catalysts, in general
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G55/00—Compounds of ruthenium, rhodium, palladium, osmium, iridium, or platinum
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B11/00—Obtaining noble metals
- C22B11/02—Obtaining noble metals by dry processes
- C22B11/021—Recovery of noble metals from waste materials
- C22B11/023—Recovery of noble metals from waste materials from pyrometallurgical residues, e.g. from ashes, dross, flue dust, mud, skim, slag, sludge
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B11/00—Obtaining noble metals
- C22B11/02—Obtaining noble metals by dry processes
- C22B11/021—Recovery of noble metals from waste materials
- C22B11/026—Recovery of noble metals from waste materials from spent catalysts
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B15/00—Obtaining copper
- C22B15/0026—Pyrometallurgy
- C22B15/0054—Slag, slime, speiss, or dross treating
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B15/00—Obtaining copper
- C22B15/0026—Pyrometallurgy
- C22B15/0056—Scrap treating
- C22B15/0058—Spent catalysts
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B4/00—Electrothermal treatment of ores or metallurgical products for obtaining metals or alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/10—Dry methods smelting of sulfides or formation of mattes by solid carbonaceous reducing agents
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Definitions
- the present invention relates to a method for recovering a platinum group element from a substance containing a platinum group element, for example, a used petrochemical catalyst, a waste catalyst for purifying an automobile exhaust gas, a used electronic substrate lead frame, or the like.
- a platinum group element for example, a used petrochemical catalyst, a waste catalyst for purifying an automobile exhaust gas, a used electronic substrate lead frame, or the like.
- platinum group elements have been recovered from platinum group element-containing substances such as waste catalysts for automobile exhaust gas purification by extracting the platinum group elements with a solution of an acid such as aqua regia and an oxidizing agent, sulfuric acid, etc. It has been known to dissolve the carrier material by using a solvent and separate it from the undissolved platinum group element.However, these wet methods have poor extraction rates of the platinum group element and require a large amount to dissolve the carrier material. It was not practical because of the problem of recovery and cost.
- a method for recovering platinum group elements by a dry method instead of the wet method is described in Japanese Patent Application Laid-Open No. Hei 43-117423.
- a platinum group element contained in a waste catalyst for purification of automobile exhaust gas is absorbed by molten copper, and this is concentrated, thereby recovering the platinum group element with high yield and low cost. It is.
- Japanese Patent Application Laid-Open No. 2000-2483222 describes a dry recovery method for platinum group elements, which is a further improvement of the method of Japanese Patent Application Laid-Open No. Hei 4-314732.
- the method disclosed in Japanese Patent Application Laid-Open No. Hei 4-3174223 and the method disclosed in Japanese Patent Application Laid-Open No. 2000-24032 is a method for obtaining platinum group elements (platinum group) with high recovery, low cost and short time.
- Metals This is sometimes abbreviated as “PGM” in the following, which is superior to the wet method in that it can be recovered, but in particular, the recovery of Rh in PGM is higher than in the wet method 'There are advantages in this regard.
- an object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a method and equipment for recovering PGM from a PGM-containing substance by a dry method with good operability and high yield. It was made for the purpose.
- an electrode for energizing and heating the furnace interior personnel and a lid for substantially shutting off the furnace interior charge from the outside atmosphere An oxide-based raw material accompanied with a platinum group element, copper oxide, a solid carbonaceous reducing agent and a flux are charged into a closed electric furnace equipped with Melt and reduction treatment to form a layer of molten metal below the molten slag layer, and concentrating the platinum group element in the molten metal.
- the raw material, copper oxide, solid carbonaceous reducing agent, and flux are prepared in the form of powder and granules, and these powder and granules are prepared in advance.
- the range of the chemical composition of the slag-based oxide produced in the furnace A 1 2 0 3: 2 0 ⁇ 4 0 wt%, S i O 2: 2 5 ⁇ 4 0 wt%, C a 0: Preferably, it is controlled to 20 to 35 wt% and Fe 0: 0 to 35 wt%.
- the content of at least one oxide of A1, Si and Fe, preferably each oxide, contained in the oxide-based raw material accompanying the platinum group element is analyzed and grasped in advance. It is preferable to control the component composition of the slag-based oxide by adjusting the component composition of the flux charged into the furnace according to the content of these oxides.
- the molten metal obtained by performing this method is discharged out of the furnace, and then transferred to another furnace where it is oxidized.
- the oxide layer containing copper oxide as the main component and the metal containing platinum group elements are concentrated. It can be separated from a molten metal containing copper as a main component with a specific gravity difference.
- the separated oxide layer containing copper oxide as a main component can be reused as copper oxide as a raw material to be charged into the electric furnace.
- a closed electric furnace having an electrode for electrically heating the furnace charging material and a lid for substantially isolating the furnace charging material from the outside atmosphere.
- An oxide-based raw material accompanied by a platinum group element, copper oxide, a solid carbonaceous reducing agent, and a flux are charged, and these furnace interior materials are heated and heated by the electrodes to melt and reduce the molten slag layer.
- the height of the molten slag layer generated in the furnace is increased.
- the furnace wall containing the steel level is made of a steel shell, and an electric furnace with a water film flow descending in contact with the outer surface is used outside the steel shell.
- an electric furnace with a water film flow descending in contact with the outer surface is used outside the steel shell.
- a self-coating layer composed of a solidified layer of the furnace melt is formed on the furnace inner surface of the steel shell.
- the water film flow descending in contact with the outer surface of the steel bar is applied from a header installed on the upper outside of the furnace wall to the entire outer circumference at the same height level of the steel bar at a predetermined head pressure. Of water is evenly distributed.
- FIG. 1 is a schematic sectional view showing a main part of an electric furnace according to the present invention.
- FIG. 2 is a schematic perspective view showing a main part of a furnace wall of the electric furnace according to the present invention.
- FIG. 3 is a diagram showing a treatment system for cooling water of an electric furnace according to the present invention. Preferred embodiments of the invention
- Fig. 1 shows an example of an electric furnace suitable for carrying out the method of the present invention.
- the electric furnace shown in Fig. 1 has an electrode 2 for electrically heating the material 1 inside the furnace, and a lid 3 for substantially isolating the material 1 inside the furnace from the outside atmosphere. It is a closed type electric furnace prepared for.
- Furnace material charge 1 consists of a mixture of oxide raw materials, carbonaceous reducing agent and flux. Furnace interior material 1 is melted by energization from electrode 2 to form molten slag layer 5 and, at the same time, molten metal 6 generated by reduction of oxides is stored below molten slag layer 5.
- reference numeral 9 denotes a material input chute.
- the furnace wall including the height level of the molten slag layer 5 generated in the furnace is constituted by a steel shell 10, and outside the steel shell 10, the outer surface thereof is provided. A water film flow 11 1 descending in contact with is formed.
- the furnace wall (furnace wall excluding the furnace bottom and the ceiling lid 3) constituting the furnace body 4 is entirely made of steel 10.
- the furnace wall above it is made of iron shell 10.
- FIG. 2 schematically shows this state.
- the entire furnace wall is constituted by a cylindrical iron shell 10.
- the furnace wall is made up of the cylindrical steel shell 10 in this way, the outer periphery of the steel shell 10 and a certain distance from the steel shell 10 are placed on the upper outside of the steel shell 10.
- an annular header 12 is installed.
- an annular gutter 13 is installed under the outer periphery of the iron shell 10 so as to surround the iron shell 1Q and be in contact with the iron shell 10. From the header 1 1 2 to the entire outer peripheral surface of the steel 10 Water is sprayed uniformly toward the outer surface of the steel shell 10, thereby forming a curtain-shaped water film flow that falls along the outer surface of the steel shell 10. The falling water film flow is formed by the annular gutter 13 receive.
- a continuous water film flow 11 (Fig. 1) on the outer surface of the steel shell 10 in this way, the inner surface of the steel shell 10 is continuously cooled, so that The generated molten slag solidifies to form a self-coated layer 14 (Fig. 1) with a predetermined thickness.
- This self-coating layer 14 may be formed not only on the existing level of the molten slag layer 7 in the furnace, but also on the inner surface above it. Therefore, even if the lining of the furnace wall is omitted during the furnace construction, a self-coating layer 14 consisting of a solidified layer of the slag is formed mainly at the level of the molten slag layer 7 inside the steel shell 10. This plays the role of lining. Although the self-coating layer 14 may be partially damaged during operation, the damaged part recovers spontaneously during operation. There is almost no need for repair work.
- Fig. 3 schematically shows the water treatment system when a continuous water film flow 11 is formed on the outer surface of the steel shell 10.
- the header 12 arranged on the peripheral surface of the steel shell 10 with the axis horizontal is provided with a slit-like nozzle port 15 on the steel shell 10 side.
- the cooling water having a predetermined head pressure is supplied to the header 12, the cooling water flows out of the slit-shaped nozzle port 15 in the horizontal direction toward the steel shell 10 in the form of a water film. It forms a steady annular flow that falls while drawing a parabola.
- the stationary annular flow naturally reaches the cylindrical surface of the shell 10, that is, the annular flow does not bounce on the surface of the shell 10 and reaches the shell 10.
- the steel shell 10 and the nozzle port 1 are designed to flow over the entire steel shell 10 with a natural spread, without leaving the steel shell 10 or branching or converging in the process of falling.
- the distance to 5, the size of the nozzle opening, the water pressure in the header, the amount of water supply, etc. are determined.
- the control of the cooling water temperature and the control of the water volume and pressure for this purpose are performed as follows.
- the water film flow 11 flowing down along the outer surface of the steel shell 10 is received by the annular gutter 13 and then temporarily stored in the storage tank 16.
- This storage tank 16 is supplied with makeup water corresponding to evaporation loss from a makeup water channel 17.
- the hot water in the storage tank 16 is supplied to the pump 18 Therefore, the water is sent to the water sprinkling device 20 of the cooling tower 19, and the hot water is cooled by heat exchange with the outside air in the cooling tower 19.
- the cooled water is pumped by a metering pump 21 into a head tank 22 and then supplied into a header 112. At this time, the amount of water sent from the head tank 22 to the header 12 is controlled so that the water level in the header 12 is constant.
- the following describes a method for recovering platinum group elements and the like from spent spent catalysts and the like.
- the electric furnace can be used in this recovery method.
- the substance to be treated containing a platinum group element referred to in the present invention is, for example, a used petrochemical waste catalyst containing platinum, palladium, etc., a purified automotive exhaust gas containing platinum, palladium, and rhodium.
- a used petrochemical waste catalyst containing platinum, palladium, etc. a purified automotive exhaust gas containing platinum, palladium, and rhodium.
- Such a substance containing a platinum group element is usually in a state in which a trace amount of the platinum group element is supported on metal oxide ceramics.
- These substances to be treated containing the platinum group elements are charged into a steelmaking furnace together with a copper source material containing copper oxide, a flux and a carbonaceous reducing agent, and are melted.
- a copper source material containing copper oxide, a flux and a carbonaceous reducing agent a copper source material containing copper oxide, a flux and a carbonaceous reducing agent.
- the molten metal layer mainly composed of copper metal is settled, and the platinum group element is concentrated in the molten metal layer settled downward.
- the present invention employs the following characteristic modes. can do.
- the substance to be treated containing the platinum group element, the copper source material containing copper oxide, the solid carbonaceous reducing agent, and the flux are all prepared in the form of powders and granules, and these powders and granules are mixed in advance. To charge the electric furnace.
- the content of at least one oxide, preferably each oxide, of A1, Si, and Fe contained in the oxide-based material accompanied by the platinum group element is analyzed and grasped in advance.
- composition of the slag separated from the molten metal is
- the balance is adjusted so as to have a component composition substantially consisting of oxygen.
- the furnace wall is made of steel, a continuous water film flow is formed on the outer surface of the steel, and the molten slag solidifies on the inner surface of the steel.
- a closed electric furnace for forming a ruf coating layer is used.
- Substances to be treated containing PGM include flux components (eg, silica, calcium oxide, calcium carbonate, etc.), carbonaceous reducing agents (eg, coke powder), and copper source materials (copper or copper oxide). ) Is mixed in an appropriate ratio and charged into an electric furnace.
- flux components eg, silica, calcium oxide, calcium carbonate, etc.
- carbonaceous reducing agents eg, coke powder
- copper source materials copper or copper oxide
- the slag-based oxides generated in the furnace are ultimately determined by the PMG-containing substances and the flux components charged into the furnace. This is because the carbonaceous reducing agent does not remain in the slag as an oxide, and substantially all of the copper oxide charged as the copper source material is reduced to metallic copper.
- the mixture of the PGM-containing substance and the flux generates in the furnace. It is possible to determine the composition range of the slag-based oxide to be formed. However, for this purpose, it is premised that meltdown, reduction reaction, and phase separation of slag and metal in the furnace are performed well. The prerequisite is that, as in the above embodiment 1, the raw materials to be charged into the furnace are all prepared in the form of powder and granules, and these powder and granules are preliminarily mixed and then mixed into the electric furnace. It turned out to be satisfied by charging.
- the diameter of metallic copper or copper oxide to be charged into an electric furnace is preferably 0.1 mm or more and less than 10 mm, and 50 wt% of PGM-containing substances is 1%. It preferably has a diameter of less than zero. It is advisable to uniformly mix these with the powdery flux and the powdery carbonaceous reducing agent, and then charge the mixed powder into the furnace.
- the reducing agent is used mainly for reducing copper oxide to metallic copper.
- coke is used as the reducing agent, but it is also possible to use precious metals or base metals containing PGM. In this case, the precious metals and PGM in the base metal can be recovered at the same time. it can. Resins and activated carbon can also be used as reducing agents.
- the copper source material is used as a medium for dissolving PGM, but metallic copper itself may be used, but copper oxide can also be used.
- the charged materials are first heated and melted (melted down).
- the temperature of ripening and melting is 1200. To 170 ° C., preferably 130 ° C. to 150 ° C. If the temperature is lower than 1200 ° C, the slag is not completely melted, the viscosity increases, and the PGM recovery rate decreases. But 1700. Exceeding C is not preferred because energy is of course a cause of damage to the furnace of the electric furnace. Due to this meltdown, the PGM carrier material (alumina and other oxides), which occupies most of the PGM-containing substances, floats as glassy molten slag, and the copper oxide is reduced by coke etc. It becomes copper and sinks in the slag due to the difference in specific gravity to form a molten metal copper layer (metal melt).
- the furnace interior is heated and melted by energizing and heating the furnace interior, and the furnace interior is heated and melted.
- the recovery of PGM is not sufficient even if the standing time is prolonged, and even if the temperature exceeds 150 ° C, the PGM recovery rate does not improve. As a result, the furnace was damaged.
- the PGM is absorbed by the metallic copper during the settling of the metallic copper in the slag. At this time, the recovery rate of the PGM into the metallic copper varies depending on the material temperature after the meltdown and the standing time. Since it varies depending on the particle size of metallic copper or copper oxide fed into the furnace, and the particle size of the PGM-containing substance charged into the furnace, proper management as described above is important.
- the metal furnace in the electric furnace where most of the metallic copper is present is mixed.
- PGM can be incorporated into the molten metal at a high recovery rate. The reason for this is not clear, but can be considered as follows.
- the carrier material oxides such as alumina
- the carrier material which occupies most of the PGM-containing substance
- it is dispersed as slag having an appropriate viscosity.
- the metallic copper reduced by the dispersant is also dispersed in the slag, and especially when mixed as particulate matter, the dispersion is good, absorbing the PGM dispersed and suspended in the slag, and lowering the weight by its own weight. Settles in metallic copper and is absorbed by the metallic copper layer. This phenomenon starts from the meltdown, but if the temperature during subsequent standing is low (for example, below 1200 ° C), the viscosity of the slag increases, and both the PGM and metallic copper present in the slag have momentum. Is reduced and the floating state continues. On the other hand, if the temperature during standing is too high (for example, if it exceeds 150 ° C), heating energy will be consumed more than necessary, which is uneconomical.
- PGM has the appropriate viscosity and It is important that the molten metallic copper settles in the dispersed slag in a state where it is properly dispersed in the slag, at a slow speed, and with an appropriate momentum. To improve the dispersion state, it is necessary to granulate and mix the charged raw materials, and to adjust the viscosity appropriately, it is important to adjust the amount and composition of the flux components and to control the temperature. .
- This standing requires sufficient time for substantially all of the molten copper to settle down in the slag, so that the reduction of copper oxide no longer proceeds and the molten copper After sedimentation, the pgm is no longer absorbed by the underlying metal melt. According to the method of the present invention that satisfies this condition, the PGM can be absorbed into the molten metal at a high recovery rate.
- the furnace-melted material that has been heated and melted can be transferred to another standing furnace, where the standing step can be performed.
- the range of the component composition of the slag-based oxide generated in the furnace is, as described in the above Embodiment 3, A1203: 20 to 40 wt%, SiO2: 25 to 40 wt%, CaO : 20 to 35 wt%, FeO: It is preferable to adjust the raw material mixture so as to be 0 to 35 wt%, but this is included in the PGM-containing substance as in the above-mentioned Embodiment 4.
- the contents of at least one oxide of A 1, Si and Fe are analyzed and grasped in advance, and the composition of the flux components charged into the furnace is adjusted according to the contents of these oxides. Is good.
- the PGM-containing substance is pulverized into granular materials of 5 mm or less before being charged into the furnace, and an analysis sample is collected from the pulverized and mixed raw materials.
- the slag becomes moderately viscous and easily dispersed and flows.
- the platinum group element mixed in the raw material to be treated becomes molten metal copper. It becomes easy to be absorbed.
- the final slag at the end of treatment is, as described above, A1: 10 to 22 wt%, Si: 10 to 16 wt%, Ca: 14 to 22 wt%, F: e: 27 wt% or less (including 0%), Pt: 10 ppm or less, with the balance substantially consisting of oxygen.
- a 1 2 0 3 exceeds 4 OWT%, extremely increases the viscosity of the slag, as a result, the platinum group elements, reducing the oxidation of copper This may be due to the fact that the contact speed with the molten copper melted becomes slower and the molten metal copper, which has absorbed the platinum group elements, floats and floats in the slag. The rate drops.
- the preferred range of A 12 O 3 is 2 (3 Owt%).
- the treatments of the embodiments 1 to 5 are performed using the electric furnace having the furnace wall structure for forming the water film flow and the self-coating layer described in FIGS. 1 to 3 as in the embodiment 6 described above.
- the platinum group element can be recovered with good operability and high yield.
- the molten metal that has absorbed the platinum group element is discharged from an electric furnace and transferred to a furnace that oxidizes in a molten state (oxidizing furnace), thereby enriching the platinum group element.
- the molten metal is oxidized with an oxygen gas or an oxygen-containing gas in an oxidation furnace separate from the electric furnace, so that an oxide layer mainly composed of copper oxide and a metal copper mainly containing platinum group elements are concentrated.
- the oxidation treatment is performed at a temperature of 110 ° C to 160 ° C, preferably at a temperature of 1200 ° C to 150 ° C, while maintaining the oxygen gas or oxygen-containing gas. Is introduced. If the temperature is lower than 110 ° C, the oxidation rate is low, and if it exceeds 160 ° C, the furnace body is damaged. After the oxidation treatment, the upper oxide layer flows out of the furnace by tilting the furnace, and then separates out. Then, the lower layer of molten metal enriched with platinum group elements also flows out of the furnace. Send to the next recovery process.
- the upper oxide layer is usually drained, and then the reduced amount of the molten metal that has newly absorbed the platinum group element is received from the electric furnace, and the remaining molten metal in the furnace is removed.
- the metal melt is discharged from the oxidation furnace only when the content of the platinum group element in the lower metal melt reaches 10% to 75%, and the platinum group element is collected in the next process. It is better to go to the process.
- the oxide layer discharged from the oxidation furnace is mostly copper oxide, it can be reused as a copper source material for electric furnaces after flowing out of the furnace and solidifying by cooling. As a result, the platinum group element entrained in the oxide layer can be recovered.
- This oxide can be granulated by rapid water cooling from the molten state to form granules of 0.1 mm or more and 10 mm or less, which is suitable as a raw material to be charged into an electric furnace. It will be.
- P t about 1 2 0 0 ppm on average, P d about 3 0 0 ppm, Rh about 9 0 ppm content to automobile exhaust gas purifying waste catalyst (on average A 12 theta 3 to about 3 8.5wt? O, S i 0 2 about 39-6 wt%,] ⁇ 80 about 12.5 wt%) was crushed to less than 1 Omm.
- 100 kg of this granular spent catalyst was charged with 500 kg of CaO and 100 kg of SiO2 as flux components, 30 kg of coke as a reducing agent, and copper oxide (0.1 mm or more). 300 kg of particles of less than O mm (about 80 wt%) were mixed and charged into an electric furnace.
- the charge was heated and melted at about 1500 ° C. in an electric furnace. After the meltdown, the material is allowed to stand still while energizing so that the material temperature is maintained at about 1400 ° C, and every hour, part of the upper slag flows out of the side of the electric furnace to cool and solidify. I let it. This operation was performed up to 20 hours after the meltdown, and the PGM in the slag collected at each hour was analyzed. The results of the analysis are shown in Table 1.
- Example 1 was repeated except that the holding temperature was 1200 ° C and the standing time was 5 hours. Analysis of PGM in slag in the same digi as in Example 1 showed that Pt: 0.9 ⁇ pm, Pd: 0 ⁇ 2 ppm, h: 0 ⁇ 1 pm or less, as shown in Table 1. . (Example 3)
- Example 1 was repeated except that the holding temperature was set to 1300 ° C and the standing time was set to 5 hours.
- PGM in the slag was analyzed in the same manner as in Example 1, as shown in Table 1, Pt: 0 ⁇ 7 ppm, Pd: 0.1 ⁇ m, Rh: 0 ⁇ 1 ppm or less.
- Example 1 was repeated, except that the holding temperature was 110 ° C and the standing time was 5 hours.
- the PGM in the slag was analyzed in the same manner as in Example 1. As shown in Table 1, Pt was 2.5 ppm, Pd was 9 ppm, and Rh was 0.2 ppm. When the temperature was lower than 1200 ° C, PGM could not be sufficiently transferred from the slag into the metal. (Comparative Example 2)
- Example 1 was repeated except that the holding temperature was 1550 ° C and the standing time was 5 hours.
- PGM in the slag was analyzed in the same manner as in Example 1, as shown in Table 1, Pt: 1.5ppm, Pd: 0.4ppm, R: 0 ppm, and Even when the holding temperature exceeded 150 ° C, PG could not be sufficiently transferred from the slag into the metal.
- the molten metal was tapped from the electric furnace, and the molten metal was guided into the heated oxidation furnace.
- Oxidation-enriched air with an oxygen concentration of 40% was sprayed on the surface of the molten metal in the molten metal in the oxidation furnace, and when an oxide layer having a thickness of approximately 1 cm was formed on the surface of the molten metal, the furnace was started. After tilting, the oxide layer was discharged from the furnace and poured into a water tank through which a large amount of water flows.
- the furnace was returned to the original state, and the same oxygen-enriched air was sprayed on the surface of the molten metal.
- the oxide layer reached a thickness of about 1 cm
- the operation of charging the oxide layer into the water tank was repeated.
- water granulation with a particle size of 10 mm or less was formed. This can be used as copper oxide as a part of the raw material for electric furnace charging.
- the molten metal that had been subjected to the treatment corresponding to Example 2 was added to the electric furnace side of the molten metal in Oxidation Furnace I. Similar oxygen-enriched air was blown.
- the target composition of the slag generated in the electric furnace was A12O3: 22.3 wt%, SiO2: 28-5 wt%, Ca0: 28.1 wt%, and Fe0: 12.1 wt%.
- the base was stored in a silo, 984.5 kg, and the flux components were Ca 0500 kg, SiO 2 100 kg, Fe, so that the target component composition was obtained.
- 0200 kg was weighed.
- 30 kg of coke as a reducing agent and 300 kg of copper oxide (about 80 wt% of powdered material of 0.1 mm or more and 10 mm or less) as a copper source material were weighed, and all of these four materials were mixed. did.
- the charge is heated and melted at about 135 ° C in an electric furnace, and after meltdown, it is allowed to stand at a temperature of 125 ° C to 130 ° C for about 5 hours.
- the material was discharged from the side of the electric furnace and cooled and solidified.
- Pt l.8 ppm
- Pd 0.4 ppm
- Rh 0.2 ppm. Loss has increased.
- Example 1 After carrying out Example 1, the molten metal containing platinum group elements in the electric furnace was discharged from the lower part of the electric furnace and led into the heated oxidation furnace. Then, oxygen-enriched air with 40% oxygen was blown against the surface of the molten metal in the oxidation furnace to oxidize it, and the oxide layer generated on the surface of the molten metal became approximately 1 cm thick. By the way, the furnace was tilted to allow the oxides to flow out of the furnace and was put into a water tank through which a large amount of water flowed.
- oxygen-enriched air was continuously blown into the molten metal in the oxidation furnace in the same manner, and when the oxide thickness grew to approximately 1 cm, the process of flowing this out of the furnace and cooling with water was repeated. After repeating this operation five times, the molten metal containing a platinum group element in the electric furnace obtained in Comparative Example 1 was led from the lower part of the electric furnace, guided into the oxidizing furnace, and combined with the molten metal in the oxidizing furnace. I made it hot. After that, the same oxygen-enriched air was blown into the molten metal in the furnace, and the generated oxide was flown out of the furnace and cooled with water.
- the entire amount of the molten metal obtained after the treatment was discharged from the oxidation furnace, cooled and solidified, and the metal was analyzed.
- the copper content was 5.4 Kg
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- Geochemistry & Mineralogy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04719656A EP1607488A4 (en) | 2003-03-14 | 2004-03-11 | METHOD FOR RECOVERING PLATING GROUP ELEMENTS |
US10/548,440 US20060213323A1 (en) | 2003-03-14 | 2004-03-11 | Method for recovering platinum group elements |
KR20057015402A KR101096498B1 (ko) | 2003-03-14 | 2004-03-11 | 백금족 원소의 회수법 |
CA 2516350 CA2516350C (en) | 2003-03-14 | 2004-03-11 | Method for recovering platinum group element |
CNB2004800063448A CN100366770C (zh) | 2003-03-14 | 2004-03-11 | 回收铂族元素的方法 |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003069659A JP3843075B2 (ja) | 2003-03-14 | 2003-03-14 | 白金族元素の乾式回収法 |
JP2003-69697 | 2003-03-14 | ||
JP2003069697A JP3903141B2 (ja) | 2003-03-14 | 2003-03-14 | 白金族元素の回収法 |
JP2003-69659 | 2003-03-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004081243A1 true WO2004081243A1 (ja) | 2004-09-23 |
Family
ID=32992975
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/003237 WO2004081243A1 (ja) | 2003-03-14 | 2004-03-11 | 白金族元素の回収法 |
Country Status (6)
Country | Link |
---|---|
US (1) | US20060213323A1 (ja) |
EP (1) | EP1607488A4 (ja) |
KR (1) | KR101096498B1 (ja) |
CN (1) | CN100366770C (ja) |
CA (1) | CA2516350C (ja) |
WO (1) | WO2004081243A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021014946A1 (ja) * | 2019-07-19 | 2021-01-28 | 学校法人早稲田大学 | Pgmの回収方法 |
JP7542072B2 (ja) | 2020-02-18 | 2024-08-29 | ヘレウス ドイチェラント ゲーエムベーハー ウント カンパニー カーゲー | 貴金属を含むコレクタ合金又は純粋な銀の製造方法 |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100858551B1 (ko) * | 2006-11-13 | 2008-09-25 | 진인수 | 전기화학적 방법에 의해 폐촉매로부터 백금족 금속을추출하는 방법 |
WO2008059770A1 (en) | 2006-11-15 | 2008-05-22 | Semiconductor Energy Laboratory Co., Ltd. | Method for collecting metal |
CN101509077B (zh) * | 2009-02-19 | 2010-08-25 | 昆明贵金属研究所 | 矿相重构从汽车催化剂中提取铂钯铑的方法 |
JP5609121B2 (ja) * | 2010-01-21 | 2014-10-22 | 新日鐵住金株式会社 | 銅鉄スクラップ中の白金を回収するための白金の溶銅相への濃化方法 |
CN102363218B (zh) * | 2011-11-25 | 2013-05-08 | 北京君致清科技有限公司 | 一种含铜炉渣直接还原生产含铜粉末铁的方法 |
GB201200781D0 (en) | 2011-12-12 | 2012-02-29 | Johnson Matthey Plc | Exhaust system for a lean-burn ic engine comprising a pgm component and a scr catalyst |
GB201200784D0 (en) | 2011-12-12 | 2012-02-29 | Johnson Matthey Plc | Exhaust system for a lean-burn internal combustion engine including SCR catalyst |
CN104178634A (zh) * | 2014-08-19 | 2014-12-03 | 昆明贵金属研究所 | 从失效汽车催化剂中高效清洁回收铂族金属的方法 |
CN104372175B (zh) * | 2014-11-14 | 2017-02-22 | 江西瑞林稀贵金属科技有限公司 | 处理电子废料的方法和系统 |
CN104988314A (zh) * | 2015-05-11 | 2015-10-21 | 昆明贵金属研究所 | 基于铜捕集回收铂族金属的方法 |
KR102132380B1 (ko) * | 2018-11-30 | 2020-07-10 | 한국생산기술연구원 | 폐촉매를 이용한 물품의 제조 방법과 이 방법에 의해 제조된 물품 |
US20230083521A1 (en) * | 2020-01-30 | 2023-03-16 | University Of Fukui | Platinum-group metal recovery method, composition containing platinum-group metals, and ceramic material |
CN115323188B (zh) * | 2022-07-27 | 2023-11-07 | 中南大学 | 一种铜捕集失效催化剂中铂族金属的方法 |
CN115612858B (zh) * | 2022-08-22 | 2023-12-19 | 中南大学 | 一种通过多次排渣捕集pgm二次资源中铂族金属的方法 |
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JPS6184336A (ja) * | 1984-06-18 | 1986-04-28 | テキサスガルフ ミネラルズ アンド メタルズ インコ−ポレ−テツド | 白金族金属の抽出法 |
JPH04317423A (ja) * | 1991-04-10 | 1992-11-09 | Tanaka Kikinzoku Kogyo Kk | 白金族金属回収方法 |
JPH0875365A (ja) * | 1994-09-02 | 1996-03-19 | Abb Manag Ag | 直流アーク炉のための容器 |
Family Cites Families (5)
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AU7663381A (en) * | 1980-11-05 | 1982-05-13 | Engelhard Corporation | Smelting process and apparatus |
JPS60162895U (ja) * | 1984-04-06 | 1985-10-29 | 川崎製鉄株式会社 | 冶金炉側壁部の鉄皮散水冷却装置 |
US4870655A (en) * | 1987-11-16 | 1989-09-26 | Ward Vincent C | Apparatus for recovery of metallics and non-metallics from spent catalysts |
CN1038199C (zh) * | 1994-11-30 | 1998-04-29 | 核工业北京化工冶金研究院 | 从废催化剂中回收铂族金属的方法 |
JP3516604B2 (ja) * | 1999-02-26 | 2004-04-05 | 同和鉱業株式会社 | メタル基体触媒からの白金族元素の回収法 |
-
2004
- 2004-03-11 CN CNB2004800063448A patent/CN100366770C/zh not_active Expired - Lifetime
- 2004-03-11 CA CA 2516350 patent/CA2516350C/en not_active Expired - Lifetime
- 2004-03-11 EP EP04719656A patent/EP1607488A4/en not_active Withdrawn
- 2004-03-11 WO PCT/JP2004/003237 patent/WO2004081243A1/ja active Application Filing
- 2004-03-11 US US10/548,440 patent/US20060213323A1/en not_active Abandoned
- 2004-03-11 KR KR20057015402A patent/KR101096498B1/ko active IP Right Grant
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6184336A (ja) * | 1984-06-18 | 1986-04-28 | テキサスガルフ ミネラルズ アンド メタルズ インコ−ポレ−テツド | 白金族金属の抽出法 |
JPH04317423A (ja) * | 1991-04-10 | 1992-11-09 | Tanaka Kikinzoku Kogyo Kk | 白金族金属回収方法 |
JPH0875365A (ja) * | 1994-09-02 | 1996-03-19 | Abb Manag Ag | 直流アーク炉のための容器 |
Non-Patent Citations (1)
Title |
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See also references of EP1607488A4 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021014946A1 (ja) * | 2019-07-19 | 2021-01-28 | 学校法人早稲田大学 | Pgmの回収方法 |
EP4001443A4 (en) * | 2019-07-19 | 2023-01-04 | Waseda University | PROCEDURE FOR PGM RECOVERY |
JP7542072B2 (ja) | 2020-02-18 | 2024-08-29 | ヘレウス ドイチェラント ゲーエムベーハー ウント カンパニー カーゲー | 貴金属を含むコレクタ合金又は純粋な銀の製造方法 |
Also Published As
Publication number | Publication date |
---|---|
KR20050105231A (ko) | 2005-11-03 |
CN1759194A (zh) | 2006-04-12 |
CA2516350A1 (en) | 2004-09-23 |
US20060213323A1 (en) | 2006-09-28 |
EP1607488A1 (en) | 2005-12-21 |
EP1607488A4 (en) | 2008-05-14 |
CA2516350C (en) | 2012-03-06 |
CN100366770C (zh) | 2008-02-06 |
KR101096498B1 (ko) | 2011-12-20 |
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