CN107487986B - Method for preparing glass beads by using liquid blast furnace slag and recovering sensible heat of slag - Google Patents
Method for preparing glass beads by using liquid blast furnace slag and recovering sensible heat of slag Download PDFInfo
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- CN107487986B CN107487986B CN201710773004.7A CN201710773004A CN107487986B CN 107487986 B CN107487986 B CN 107487986B CN 201710773004 A CN201710773004 A CN 201710773004A CN 107487986 B CN107487986 B CN 107487986B
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B19/00—Other methods of shaping glass
- C03B19/10—Forming beads
- C03B19/1005—Forming solid beads
- C03B19/102—Forming solid beads by blowing a gas onto a stream of molten glass or onto particulate materials, e.g. pulverising
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C1/00—Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
- C03C1/002—Use of waste materials, e.g. slags
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C12/00—Powdered glass; Bead compositions
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
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Abstract
The invention discloses a method for preparing glass beads by using liquid blast furnace slag and recovering sensible heat of the slag, which comprises the following steps: adding a conditioning agent into the liquid blast furnace slag and uniformly mixing to obtain conditioned liquid blast furnace slag, heating the conditioned liquid blast furnace slag to melt the conditioning agent, and preserving the heat at 1400-1750 ℃ for 10-30 minutes after the conditioning agent is melted; crushing and granulating the vertically falling liquid blast furnace slag through air jet flow sprayed by a Laval nozzle to obtain slag particles; slag particles enter the rotary slag cooler from an inlet of the rotary slag cooler and stay in the rotary slag cooler for 10-15 minutes, and then are discharged from the rotary slag cooler.
Description
Technical Field
The invention belongs to the technical field of preparation of glass beads, and particularly relates to a method for preparing glass beads by using liquid blast furnace slag and recovering sensible heat of the slag.
Background
The glass beads are a novel material which is developed in recent years, has wide application and special performance, has the granularity of several microns to several millimeters, has the advantages of light weight, high hardness, high strength, stable chemical performance and the like, and is widely applied to various fields, such as being used as a pressure proppant in the process of oil exploitation; the material is used as a reinforcing filling material for rubber and plastic products; billboards, reflective material for traffic signs, and the like.
Blast furnace slag is waste slag generated in the steel smelting process, about 250-350 kg of blast furnace slag is generated per ton of smelted pig iron, and the slag yield can reach about three hundred million tons according to 10 hundred million tons of annual pig iron output in China. The waste residues are not used, so that the land is occupied and the environment is polluted. At present, liquid blast furnace slag discharged from a blast furnace in China is mainly treated by a water slag flushing method, and the obtained water slag is ground and used as a mineral admixture for cement and concrete. The conventional slag flushing method for treating liquid blast furnace slag has the problems of low water slag value of a treated product, high water resource consumption, high pollutant gas discharge amount, difficulty in recovering high-value sensible heat and the like. The temperature of the blast furnace slag discharged from the blast furnace is generally 1400 ℃ to 1600 ℃, and 1t of the blast furnace slag contains sensible heat equivalent to the heat of combustion of 57kg of standard coal. For the problem of blast furnace slag waste heat recovery, many scientific research units are actively researching. According to the current recycling level of blast furnace slag in China, the utilization rate is low, and the economic benefit of comprehensive utilization is not high. Therefore, from the perspective of comprehensive utilization of resources and energy conservation, it has become a focus of attention at home and abroad on how to improve the utilization rate of blast furnace slag, how to reasonably and effectively utilize the blast furnace slag resources, find a new way for resource utilization of blast furnace slag, and develop high value-added products by using blast furnace slag.
Patent 201310353062.9 proposes a device and method for dry treatment and sensible heat recovery of high-temperature molten slag, the device comprises a grate, a water-cooled wall, a scraper, a slag particle collector and a waste heat recovery device, wherein a first driving chain wheel of the grate is positioned below a tundish, the water-cooled wall is positioned above the grate, a gap is reserved between one end of the scraper and the grate, the slag particle collector is arranged below the other end of the scraper, and the slag particle collector is arranged below the other end of the scraperThe bottom of the device is provided with a crusher and a waste heat recovery device. The method comprises the following steps: the method has the characteristics of simple operation, less environmental pollution, low process cost and the like, but has larger vitreous body grain diameter and relatively single application field. 201210339309.4 discloses a method and system for slag granulation and sensible heat recovery, which comprises pressurizing water and spraying it from a nozzle to form a columnar high-speed water jet, impacting the narrow side of a freely falling flat belt-shaped slag flow, crushing the slag, cooling the crushed slag by a water wall in the falling process, recovering part of the sensible heat, then dropping the slag into the fluidized bed layer or onto an air-cooled moving grate, cooling by the air entering from the outside, and completely solidifying to complete granulation and obtain hot air, sending the hot air obtained from the fluidized bed or moving grate to a waste heat boiler to recover heat, and sending the granulated slag particles output from the fluidized bed or moving grate to the moving bed to further recover the sensible heat. The invention adopts high-speed water jet to break the slag, although the breaking and flying effects are good, the slag wool generation amount is small, the water consumption is large, and a large amount of SO can be generated in the water flow cooling process2And H2S gas causes environmental pollution.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a method for preparing glass beads by using liquid blast furnace slag and recovering sensible heat of the slag, the method directly produces the glass beads by simply quenching and tempering and adopting gas quenching to form the beads, and simultaneously recovers the sensible heat of the beads, wherein the sensible heat recovery utilization rate can reach over 75 percent, thereby not only meeting the national energy-saving and emission-reduction policy of blast furnace slag utilization, but also reducing the production cost of the glass beads, and having the advantages of energy consumption saving, cyclic utilization and production continuity.
The purpose of the invention is realized by the following technical scheme.
A method for preparing glass beads by using liquid blast furnace slag and recovering sensible heat of the slag comprises the following steps:
1) adding a conditioning agent into the liquid blast furnace slag and uniformly mixing to obtain the conditioned liquid blast furnace slag, wherein the mass part ratio of the conditioning agent to the liquid blast furnace slag is (1-3): 10, the preparation is made of 12.6 to 16.2 wt% of SiO236.5 to 42 wt% of CaO, 6.7 to 10.2 wt% of MgO, 0.54 to 3.2 wt% of Al2O311.1 to 15.1 wt% of Fe2O3And the balance MnO;
in the above technical solution, in the step 1), the modulating agent is formed of 12.6 to 13.5 wt% of SiO236.5 to 38 wt% of CaO, 6.7 to 8.3 wt% of MgO, 0.54 to 1.7 wt% of Al2O311.1 to 12.1 wt% of Fe2O3And the balance MnO.
In the above technical solution, in the step 1), the modulating agent is made of 14.2 to 15.5 wt% of SiO238.5 to 41.3 wt% of CaO, 9 to 9.6 wt% of MgO, 2.2 to 3 wt% of Al2O313.4 to 15 wt% of Fe2O3And the balance MnO.
In the technical scheme, the modulating agent is one or more of fly ash, iron tailing powder, limestone powder, steel slag, caustic sludge and fluorite.
In the step 1), the liquid blast furnace slag is located in a slag pot.
2) Heating the quenched and tempered liquid blast furnace slag obtained in the step 1) to melt a modulator, and after the modulator is melted, preserving heat for 10-30 minutes at 1400-1750 ℃;
in the step 2), the heating time is 10-30 minutes, and the heating temperature is 1400-1750 ℃.
In the step 2), in the process of heating the quenched and tempered liquid blast furnace slag, inert gas is blown from the bottom of the slag pot to promote convection of the quenched and tempered liquid blast furnace slag.
3) Vertically dropping the quenched and tempered liquid blast furnace slag obtained in the step 2) from an outlet of a slag chute under the drainage action of the slag chute, arranging a Laval nozzle at one side of a dropping track of the liquid blast furnace slag, and crushing and granulating the vertically dropped liquid blast furnace slag through air jet flow sprayed by the Laval nozzle to obtain slag particles; under the action of the air jet flow, the slag particles enter the rotary slag cooler from the inlet of the rotary slag cooler and stay in the rotary slag cooler for 10-15 minutes, so that the slag particles shrink to form glass beads, and the glass beads are discharged from the rotary slag cooler; the injection pressure of the Laval nozzle is 0.1-0.3 MPa, the speed of the air jet is supersonic, and the rotating speed of the rotary slag cooler is 3-6 r/min.
In the step 3), a cooling water jacket is arranged in the rotary slag cooler and is used for recovering heat of the slag particles.
In the step 3), the temperature of the glass beads discharged from the rotary slag cooler is 100-150 ℃.
Compared with the prior art, the invention provides a novel method for treating and utilizing the liquid blast furnace slag, which is characterized in that the liquid blast furnace slag is mixed with a certain amount of modulating agent and then gas-quenched into beads, then the beads are subjected to waste heat recovery through a slag cooler, and glass bead products are collected. The method does not produce toxic and harmful gas in the process of treating the liquid blast furnace slag, can reasonably recover the waste heat in the blast furnace slag, saves energy, reduces the pollution to the environment, can partially replace the prior glass bead product, and can be widely applied to the fields of building materials, chemical industry, petroleum, traffic and the like.
Drawings
FIG. 1 is a photomicrograph of glass microspheres produced by the method of the present invention.
Detailed Description
The glass beads prepared by the method have excellent performance and stable quality, and can be applied to a plurality of fields.
In a specific embodiment of the present invention, the conditioning agent is formulated by one or more of fly ash, iron tailings powder, limestone powder, steel slag, caustic sludge, and fluorite. And a cooling water jacket is arranged in the rotary slag cooler and is used for recovering heat of slag particles.
The technical scheme of the invention is further explained by combining specific examples.
Example 1
A method for preparing glass beads by using liquid blast furnace slag and recovering sensible heat of the slag comprises the following steps:
1) the method comprises the following steps of enabling liquid blast furnace slag to flow into a slag pot from a blast furnace slag groove, adding a conditioning agent into the liquid blast furnace slag (slag pot), and uniformly mixing to obtain conditioned liquid blast furnace slag, wherein the ratio of the conditioning agent to the liquid blast furnace slag in parts by mass is 1.5: 10, the preparation is made of 15 wt% SiO238.5 wt% CaO, 9.5 wt% MgO, 2.2 wt% Al2O313.4 wt% Fe2O3And the balance MnO.
2) Transporting the slag pot filled with the quenched and tempered liquid blast furnace slag obtained in the step 1) to a heating station, placing the slag pot below an electrode for heating, wherein the heating time is 20 minutes, the heating temperature is 1450 ℃, so that the modulating agent is melted, meanwhile, in the process of heating the quenched and tempered liquid blast furnace slag, injecting inert gas from the bottom of the slag pot, observing the melting condition of the modulating agent every 10 minutes, and continuously adjusting the heating power, so that the modulating agent is rapidly melted, and is used for promoting the convection of the quenched and tempered liquid blast furnace slag and homogenizing the temperature components of the quenched and tempered liquid blast furnace slag. After the modulating agent is melted, pouring the liquid blast furnace slag which is uniformly stirred in the slag pot into a direct current electric arc furnace, and preserving the heat for 10 minutes at 1500 ℃;
3) opening the furnace to remove slag, vertically dropping the tempered liquid blast furnace slag obtained in the step 2) from an outlet of a slag chute under the drainage action of the slag chute, arranging a Laval nozzle at one side of a dropping track of the liquid blast furnace slag, simultaneously locating the Laval nozzle below the outlet of the slag chute, and crushing and granulating the vertically dropped liquid blast furnace slag through air jet flow sprayed by the Laval nozzle to obtain slag granules; meanwhile, under the action of air jet, slag particles enter the rotary slag cooler from an inlet of the rotary slag cooler and stay in the rotary slag cooler for 10 minutes, the slag particles shrink to form glass beads under the action of surface tension, and the glass beads are discharged from the rotary slag cooler, wherein the temperature of the glass beads discharged from the rotary slag cooler is 110 ℃. Wherein the injection pressure of the Laval nozzle is 0.2MPa, the speed of the air jet is supersonic speed, and the rotating speed of the rotary slag cooler is 6 r/min.
After the rotary slag cooler and the glass beads are subjected to full heat exchange, most of sensible heat in the glass beads is recovered, and the waste heat recovery rate is 79%. And discharging the cooled microbeads into a microbead collector, and screening and packaging to obtain microbead products. And detecting the collected glass beads, wherein the bead forming rate is 81.12%. Wherein the proportion of the number of the glass beads with the particle size of 2.5-5 mm is 20.19%, the proportion of the number of the glass beads with the particle size of 1-2.5 mm is 46%, the proportion of the number of the glass beads with the particle size of 1-50 meshes is 12.9%, the proportion of the number of the glass beads with the particle size of 50-100 meshes is 2.06%, and the proportion of the number of the glass beads with the particle size of less than 100 meshes is 1.59%.
Example 2
A method for preparing glass beads by using liquid blast furnace slag and recovering sensible heat of the slag comprises the following steps:
1) the method comprises the following steps of enabling liquid blast furnace slag to flow into a slag pot from a blast furnace slag groove, adding a conditioning agent into the liquid blast furnace slag (slag pot), and uniformly mixing to obtain conditioned liquid blast furnace slag, wherein the ratio of the conditioning agent to the liquid blast furnace slag in parts by mass is 2: 10, the preparation is made of 13 wt% SiO236.8 wt% CaO, 8 wt% MgO, 1.7 wt% Al2O312 wt% of Fe2O3And the balance MnO.
2) Transporting the slag pot filled with the quenched and tempered liquid blast furnace slag obtained in the step 1) to a heating station, placing the slag pot below an electrode for heating, wherein the heating time is 25 minutes, the heating temperature is 1600 ℃, so that the modulating agent is melted, meanwhile, in the process of heating the quenched and tempered liquid blast furnace slag, injecting inert gas from the bottom of the slag pot, observing the melting condition of the modulating agent every 10 minutes, and continuously adjusting the heating power, so that the modulating agent is rapidly melted, and is used for promoting the convection of the quenched and tempered liquid blast furnace slag and homogenizing the temperature components of the quenched and tempered liquid blast furnace slag. After the modulating agent is melted, pouring the liquid blast furnace slag which is uniformly stirred in the slag pot into a direct current electric arc furnace, and preserving the heat for 20 minutes at 1700 ℃;
3) opening the furnace to remove slag, vertically dropping the tempered liquid blast furnace slag obtained in the step 2) from an outlet of a slag chute under the drainage action of the slag chute, arranging a Laval nozzle at one side of a dropping track of the liquid blast furnace slag, simultaneously locating the Laval nozzle below the outlet of the slag chute, and crushing and granulating the vertically dropped liquid blast furnace slag through air jet flow sprayed by the Laval nozzle to obtain slag granules; meanwhile, under the action of air jet, slag particles enter the rotary slag cooler from an inlet of the rotary slag cooler and stay in the rotary slag cooler for 15 minutes, and under the action of surface tension, the slag particles shrink to form glass microspheres which are discharged from the rotary slag cooler, and at the moment, the temperature of the glass microspheres discharged from the rotary slag cooler is 120 ℃. Wherein the injection pressure of the Laval nozzle is 0.3MPa, the speed of the air jet is supersonic speed, and the rotating speed of the rotary slag cooler is 5 r/min.
After the rotary slag cooler and the glass beads are subjected to full heat exchange, most of sensible heat in the glass beads is recovered, and the waste heat recovery rate is 75%. And discharging the cooled glass beads into a bead collector, and screening and packaging to obtain bead products. And detecting the collected glass beads, wherein the bead forming rate is 78.9 percent. Wherein the proportion of the number of the glass beads with the particle size of 2.5-5 mm is 10.82%, the proportion of the number of the glass beads with the particle size of 1-2.5 mm is 42.56%, the proportion of the number of the glass beads with the particle size of 1-50 meshes is 19.96%, the proportion of the number of the glass beads with the particle size of 50-100 meshes is 3.43%, and the proportion of the number of the glass beads with the particle size of less than 100 meshes is 2.14%.
1) Bulk density
The glass beads prepared in example 1 of the present invention were placed in a drying oven and dried to a constant amount, the dried glass beads were classified according to the particle size range shown in table 1 below, and after classification, each type of glass beads was tested according to the following bulk density test method, so as to obtain the bulk densities of the glass beads prepared in the present invention at different particle sizes.
Bulk density test method: preparing a cylinder, uniformly pouring glass microspheres into the cylinder by using a sampling spoon or a material shovel at a position 50mm away from the upper part of the cylinder opening of the cylinder, enabling the glass microspheres to naturally fall off without colliding with the cylinder, enabling the glass microspheres above the cylinder opening to be conical after filling, then scraping the glass microspheres from the center to two sides along the edge of the cylinder opening of the cylinder by using a ruler, filling the surface depression with aggregate with smaller particle size, weighing and then weighing
ρ＝(m1-m2)/v
m 1-total mass of sample and cylinder
m 2-Cylinder Mass
v-cylinder volume
TABLE 1 bulk Density test results
2) Microhardness
Any 5 of the glass beads having a particle size of 2.5 to 5mm prepared in example 2 were measured for Vickers microhardness using an HVS-1000A type digital microhardness tester, wherein the experimental force F was 2.942N. The vickers hardness of 5 glass beads was as follows:
the micro vickers hardness of 5 of the glass beads having a particle size of 1 to 2.5mm obtained in example 2 was measured by using an HVS-1000A type digital micro hardness tester, and the experimental force F was 1.962N. The vickers hardness of 5 glass beads was as follows:
3) chemical aggressiveness
The glass beads obtained in example 1 were classified according to their particle size range, and after classification, the glass beads in each particle size range were immersed in an acid or alkali solution, and their weight loss was measured after boiling for four hours in the solution. Wherein the mass of the glass microspheres in each particle size range is 5.0000 +/-0.01 g.
The soak solution is as follows:
n represents equivalent concentration: the solution concentration is calculated as the gram equivalent of solute in 1 liter of solution, for example, 12 gram equivalents of hydrochloric acid (HCL) in 1 liter of concentrated hydrochloric acid, and the solubility is 12N.
(Mass) loss Rate
In conclusion, the bulk density of the glass beads prepared by the method is 1450-1850 kg/m3The bead forming rate is 78-82%, the proportion of the number of glass beads with the particle size of 1-2.5 mm is 42-46%, the Vickers hardness of the glass beads with the particle size of 2.5-5 mm is 1034-1252, and the Vickers hardness of the glass beads with the particle size of 1-2.5 mm is 600-817; h2The corrosion loss rate of O is 0.06-0.1%, the corrosion loss rate of HCl is 3-4.3%, and the corrosion loss rate of NaOH is 0.05-0.31%.
In the technical solution of the present invention, the properties consistent with those of the above-described embodiments can be achieved by adjusting the heating temperature, the heating time, the composition of the preparation agent, and the like.
The invention has been described in an illustrative manner, and it is to be understood that any simple variations, modifications or other equivalent changes which can be made by one skilled in the art without departing from the spirit of the invention fall within the scope of the invention.
Claims (10)
1. A method for preparing glass beads by using liquid blast furnace slag and recovering sensible heat of the slag is characterized by comprising the following steps:
1) the blast furnace slag is waste slag generated in the steel smelting process and is in a liquid blast furnaceAdding a conditioning agent into the slag and uniformly mixing to obtain a conditioned liquid blast furnace slag, wherein the mass part ratio of the conditioning agent to the liquid blast furnace slag is (1-3): 10, the preparation is made of 12.6 to 16.2 wt% of SiO236.5 to 42 wt% of CaO, 6.7 to 10.2 wt% of MgO, 0.54 to 3.2 wt% of Al2O311.1 to 15.1 wt% of Fe2O3And the balance MnO;
2) heating the quenched and tempered liquid blast furnace slag obtained in the step 1) to melt a modulator, and after the modulator is melted, preserving heat for 10-30 minutes at 1400-1750 ℃;
3) vertically dropping the quenched and tempered liquid blast furnace slag obtained in the step 2) from an outlet of a slag chute under the drainage action of the slag chute, arranging a Laval nozzle at one side of a dropping track of the liquid blast furnace slag, and crushing and granulating the vertically dropped liquid blast furnace slag through air jet flow sprayed by the Laval nozzle to obtain slag particles; under the action of the air jet flow, the slag particles enter the rotary slag cooler from the inlet of the rotary slag cooler and stay in the rotary slag cooler for 10-15 minutes, so that the slag particles shrink to form glass beads, and the glass beads are discharged from the rotary slag cooler; the injection pressure of the Laval nozzle is 0.1-0.3 MPa, the speed of the air jet is supersonic, and the rotating speed of the rotary slag cooler is 3-6 r/min.
2. The method according to claim 1, wherein in the step 1), the preparation agent is composed of 12.6 to 13.5 wt% of SiO236.5 to 38 wt% of CaO, 6.7 to 8.3 wt% of MgO, 0.54 to 1.7 wt% of Al2O311.1 to 12.1 wt% of Fe2O3And the balance MnO.
3. The method according to claim 1, wherein in the step 1), the preparation agent is composed of 14.2 to 15.5 wt% of SiO238.5 to 41.3 wt% of CaO, 9 to 9.6 wt% of MgO, 2.2 to 3 wt% of Al2O313.4 to 15 wt% of Fe2O3And the balance MnO.
4. The method of claim 2 or 3, wherein the conditioning agent is one or more of fly ash, iron tailings powder, limestone powder, steel slag, caustic sludge, and fluorite.
5. The method according to claim 4, wherein in step 1) the liquid blast furnace slag is located in a slag pot.
6. The method according to claim 5, wherein in the step 2), the heating time is 10 to 30 minutes, and the heating temperature is 1400 to 1750 ℃.
7. The method according to claim 6, wherein in the step 2), during the heating of the quenched and tempered liquid blast furnace slag, an inert gas is injected from the bottom of the slag pot for promoting convection of the quenched and tempered liquid blast furnace slag.
8. The method according to claim 7, characterized in that in the step 3), a cooling water jacket is arranged in the rotary slag cooler for recovering heat of the slag particles.
9. The method according to claim 8, wherein in the step 3), the temperature of the glass beads discharged from the rotary slag cooler is 100 to 150 ℃.
10. Use of the method according to any one of claims 1 to 9 for the preparation of glass microbeads, wherein the glass microbeads prepared by said method have a bulk density of 1450 to 1850kg/m3The beading rate of the glass beads prepared by the method is 78-82%;
the Vickers hardness of the glass beads with the particle size of 1-2.5 mm is 600-817; the Vickers hardness of the glass beads with the particle size of 2.5-5 mm is 1034-1252; h2The corrosion loss rate of O is 0.06-0.1%, and the corrosion loss rate of HCl is 3-4.3%And the corrosion loss rate of NaOH is 0.05-0.31%.
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| CN110218008B (en) * | 2019-06-24 | 2021-11-05 | 华北理工大学 | Method for carrying out iron removal modification on liquid steel slag discharged from furnace by using carbon-containing molten iron |
| CN110218100A (en) * | 2019-07-20 | 2019-09-10 | 兰州理工大学 | A kind of method that nickel-iron smelting high-temperature slag prepares hollow ceramic microspheres |
| CN110512038A (en) * | 2019-10-11 | 2019-11-29 | 攀钢集团攀枝花钢铁研究院有限公司 | Vanadium slag wind quenching thinning processing method |
| CN113322360A (en) * | 2020-02-28 | 2021-08-31 | 宝山钢铁股份有限公司 | Blast furnace slag granulation and waste heat recovery device and method |
| CN114105474B (en) * | 2022-01-27 | 2022-04-08 | 华北理工大学 | Blast furnace slag and waste medicinal glass co-processing method |
| CN115246703B (en) * | 2022-09-26 | 2022-11-25 | 华北理工大学 | Method for controlling particle size of blast furnace slag-based glass beads by utilizing shear thinning characteristic |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3243273A (en) * | 1957-08-12 | 1966-03-29 | Flex O Lite Mfg Corp | Method and apparatus for production of glass beads by dispersion of molten glass |
| US3279905A (en) * | 1962-03-27 | 1966-10-18 | Potters Brothers Inc | Method and apparatus for forming glass beads |
| CN1278517A (en) * | 2000-07-06 | 2001-01-03 | 张万春 | Production proccess of glass bead |
| CN102851416A (en) * | 2012-09-24 | 2013-01-02 | 四川环能德美科技股份有限公司 | Heat recovery method for blast furnace slag |
| CN104975117A (en) * | 2015-07-15 | 2015-10-14 | 南京凯盛开能环保能源有限公司 | Blast furnace slag overall treatment and sensible heat recovery power generation system and method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4113915A (en) * | 1974-10-16 | 1978-09-12 | Schott Charles W | Glass bead product |
-
2017
- 2017-08-31 CN CN201710773004.7A patent/CN107487986B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3243273A (en) * | 1957-08-12 | 1966-03-29 | Flex O Lite Mfg Corp | Method and apparatus for production of glass beads by dispersion of molten glass |
| US3279905A (en) * | 1962-03-27 | 1966-10-18 | Potters Brothers Inc | Method and apparatus for forming glass beads |
| CN1278517A (en) * | 2000-07-06 | 2001-01-03 | 张万春 | Production proccess of glass bead |
| CN102851416A (en) * | 2012-09-24 | 2013-01-02 | 四川环能德美科技股份有限公司 | Heat recovery method for blast furnace slag |
| CN104975117A (en) * | 2015-07-15 | 2015-10-14 | 南京凯盛开能环保能源有限公司 | Blast furnace slag overall treatment and sensible heat recovery power generation system and method |
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