CN108611487A - A kind of resource utilization method of the solid waste containing magnesium - Google Patents
A kind of resource utilization method of the solid waste containing magnesium Download PDFInfo
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- CN108611487A CN108611487A CN201810314008.3A CN201810314008A CN108611487A CN 108611487 A CN108611487 A CN 108611487A CN 201810314008 A CN201810314008 A CN 201810314008A CN 108611487 A CN108611487 A CN 108611487A
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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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
- C22B1/243—Binding; Briquetting ; Granulating with binders inorganic
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/008—Composition or distribution of the charge
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/02—Making special pig-iron, e.g. by applying additives, e.g. oxides of other metals
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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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
-
- 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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
-
- 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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
-
- 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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/248—Binding; Briquetting ; Granulating of metal scrap or alloys
-
- 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
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of resource utilization methods of solid waste containing magnesium, belong to resource recycling field.The method includes：The solid waste containing magnesium that silicon steel production generates first is dried；Solid waste containing magnesium after drying is subjected to roller mill and screening, screen out 200 mesh or more solid waste containing magnesium and is less than 200 purpose solid wastes containing magnesium；Solid wastes containing magnesium more than 200 mesh screened out is carried out to produce magnesia pellet with matching to add in pellet together as raw material less than 200 purpose solid wastes containing magnesium after profit mill.The present invention is by containing after magnesium solid waste is handled with adding in pellet, not only realizing the recycling of the solid waste containing magnesium, can also be effectively improved the metallurgical performances such as reduction degree, the reduction swellability rate of pelletizing, improve pelletizing quality.
Description
Technical field
The present invention relates to field of resource recovery technique, more particularly to the resource utilization method of a kind of solid waste containing magnesium.
Background technology
Silicon-steel magnesium oxide needs to meet content of MgO more than 98%, and CaO content is less than 0.5%, Cl-Ion concentration is less than
0.02% equal requirement, also requires certain aquation rate and activity, and manufacturing process is complicated, and production cost is high, and is produced in silicon steel
Part solid waste containing magnesium will be inevitably generated in journey.The direct emission of solid waste containing magnesium not only can cause environmental pollution, and also cause
The waste of resource.
Invention content
The object of the present invention is to provide a kind of resource utilization method of solid waste containing magnesium, this method can not only be realized containing magnesium
The recycling of solid waste, additionally it is possible to reduce Swelling of Pellets During Reduction rate, improve pelletizing quality.
To achieve the above object, the present invention provides a kind of resource utilization method of solid waste containing magnesium, the method includes：
The solid waste containing magnesium that silicon steel production generates first is dried；
Solid waste containing magnesium after drying is subjected to roller mill and screening, screen out 200 mesh or more solid waste containing magnesium and is less than 200 purposes
Solid waste containing magnesium；
By solid wastes containing magnesium more than 200 mesh screened out carry out after profit mill with less than 200 purpose solid wastes containing magnesium together as
Raw material, which matches to add in pellet, produces magnesia pellet.
Further, content of MgO is more than 60% in the solid waste containing magnesium.
Further, further include SiO in the solid waste containing magnesium2、Al2O3, FeO and TiO2。
Further, the moisture control of the solid waste containing magnesium after the drying is below 10%.
Further, according to mass percent, the chemical composition of the magnesia pellet is：Iron Ore Powder 90%-95.5%,
Solid waste containing magnesium that treated 4%-7%, binder 0.5%-3%.
Further, the Iron Ore Powder is concentrate powder, and the concentrate powder is selected from magnetite powder or ground hematite.
Further, the granularity of the concentrate powder reaches 80% or more in 200 mesh accounting below.
Further, the binder is bentonite or compound binding agent.
Further, the production method of the magnesia pellet specifically includes：
Weigh the Iron Ore Powder of 90%-95.5%, the binder of 4%-7% treated solid wastes containing magnesium and 0.5%-3%
It is uniformly mixed, forms mixture；
Pelletizing is carried out to the mixture, controls the green-ball moisture of formation between 8.0%-9.0%；
The green-ball of screening grain size 8-16mm is dried, preheats, roasting successively, soaking and cooling procedure, obtains the magnesium
Matter pellet.
Further, the temperature of the drying is 300-450 DEG C, time 6-8min；The temperature of the preheating is 500-
1000 DEG C, time 4-6min；The temperature of the roasting is 1150-1270 DEG C, time 7-10min；The temperature of the soaking is
1100-1150 DEG C, time 2-3min.
One or more of the embodiment of the present application technical solution, has at least the following technical effects or advantages：
The resource utilization method of the solid waste provided by the embodiments of the present application containing magnesium, the method includes：Silicon steel is produced and is produced
Raw solid waste containing magnesium is first dried；Solid waste containing magnesium after drying is subjected to roller mill and screening, it is solid containing magnesium to screen out 200 mesh or more
It gives up and is less than 200 purpose solid wastes containing magnesium；By solid wastes containing magnesium more than 200 mesh screened out carry out after profit mill be less than 200 purposes
Solid waste containing magnesium matches to add in pellet together as raw material produces magnesia pellet.By carrying out processing with adding to containing magnesium solid waste
In pellet, the recycling of the solid waste containing magnesium is not only realized, additionally it is possible to Swelling of Pellets During Reduction rate is reduced, pelletizing quality is improved,
Meet the strategy of sustainable development.
Description of the drawings
Fig. 1 is the resource utilization method flow chart of the solid waste provided by the embodiments of the present application containing magnesium；
Fig. 2 is the production method flow chart of magnesia pellet provided by the embodiments of the present application；
Fig. 3 is the production method flow diagram of magnesia pellet provided by the embodiments of the present application.
Specific implementation mode
The embodiment of the present application provides a kind of resource utilization method of the solid waste containing magnesium, and this method can not only be realized solid containing magnesium
Useless recycling, additionally it is possible to reduce Swelling of Pellets During Reduction rate, improve pelletizing quality, more good raw material is provided for blast furnace.
To achieve the above object, the embodiment of the present application general thought is as follows：
This application provides a kind of resource utilization method of solid waste containing magnesium, the method includes：
The solid waste containing magnesium that silicon steel production generates first is dried；
Solid waste containing magnesium after drying is subjected to roller mill and screening, screen out 200 mesh or more solid waste containing magnesium and is less than 200 purposes
Solid waste containing magnesium；
By solid wastes containing magnesium more than 200 mesh screened out carry out after profit mill with less than 200 purpose solid wastes containing magnesium together as
Raw material, which matches to add in pellet, produces magnesia pellet.
Above-mentioned technical proposal realizes the solid waste containing magnesium by that will contain magnesium solid waste with being added in pellet after being handled
It recycles, meets the strategy of sustainable development；Due to using the addition of MgO of the replacement of solid waste containing magnesium or partial alternative, to
Reduce the additive amount of MgO in Iron Ore Powder, can effectively reduce content of MgO in sinter, to reach raising sinter quality
Effect, pelletizing can reduce SiO in pelletizing with addition of solid waste containing magnesium under the premise of ensureing reduction swellability rate2Content reaches and changes
The effect of kind pelletizing quality.
In order to better understand the above technical scheme, below by attached drawing and specific embodiment to technical scheme
It is described in detail, it should be understood that the specific features in the embodiment of the present application and embodiment are to the detailed of technical scheme
Thin explanation, rather than to the restriction of technical scheme, in the absence of conflict, the embodiment of the present application and embodiment
In technical characteristic can be combined with each other.
As shown in Figure 1, the embodiment of the present application provides a kind of resource utilization method of the solid waste containing magnesium, the method includes with
Lower step：
Step S110：The solid waste containing magnesium that silicon steel production generates first is dried；
In the present embodiment, the solid waste containing magnesium is the waste after silicon steel heat treatment, and main component includes MgO, content
More than 60%.Also include SiO21%-4%, TiO23%-5%, TFe1%-10%, Al2O32%-10%.Wherein TFe is full iron
Content.The moisture content of solid waste containing magnesium is generally in 10%-20%, and due to aqueous excessively high, pureed is presented, can not be equal with the mixing such as miberal powder
It is even, therefore it is dried and is handled so that it disperses.The recycling that waste is realized using solid waste containing magnesium is met sustainable
The strategy of development.Main component MgO in solid waste containing magnesium meeting and Fe during pellet roasting2O3Stable magnesium ferrite is formed,
Pelletizing surface forms protective layer, reduces reduction swellability rate, improves pelletizing quality；Fe therein is conducive to increase MgO and Iron Ore Powder
Compatibility, TiO2Be conducive to improve the intensity of pelletizing, Al2O3Addition be conducive to pelletizing blast furnace adjust slag mobility.
Step S120：Solid waste containing magnesium after drying is subjected to roller mill and screening, screen out 200 mesh or more solid waste containing magnesium with it is small
In 200 purpose solid wastes containing magnesium；
In the present embodiment, by the moisture control of the solid waste containing magnesium after drying 10% hereinafter, it is preferred that 8%-10%.It is aqueous
Pureed is presented in the excessively high solid waste containing magnesium of rate, reunites together, can not be uniformly mixed with miberal powder；If too low, since dehydration is excessive, hold
It is easily formed hardened, it is not easy to disperse, the granularity of you itself will not be returned back to dispersion；If being in addition exactly moisture content mistake
Low, green-ball moisture will be controlled in 8-9% when pelletizing, also to be added water, be also belonged to waste.Due to being dried to containing magnesium solid waste
After can form caking, it is therefore desirable to carry out roller mill processing clayed into power.
Step S130：By solid wastes containing magnesium more than 200 mesh screened out carry out after profit mill be less than 200 purpose solid wastes containing magnesium
Match to add in pellet together as raw material and produces magnesia pellet.
Since particles more than 200 mesh is larger, it is unfavorable for pelletizing, therefore in this step to more than 200 mesh solid containing magnesium
The useless profit mill that carries out is conducive to pelletizing, to improve pellet characteristics to increase its specific surface area.
In the present embodiment, according to mass percent, the chemical composition of the magnesia pellet is：Iron Ore Powder 90%-
95.5%, solid waste containing magnesium that treated 4%-7%, binder 0.5%-3%.It is described that treated that solid waste containing magnesium refers to through aforementioned
Drying-roller mill-screening-profit mill treated solid waste containing magnesium.
Further, the Iron Ore Powder is concentrate powder, and the concentrate powder is selected from magnetite powder or ground hematite.
Preferably, the granularity of the concentrate powder reaches 80% or more in 200 mesh accounting below.Here granularity refers to sieve
Gradation degree can guarantee that powder particle size fineness, pelletizing effect are good in 200 mesh accounting below 80% or more.
In the present embodiment, the binder is bentonite or compound binding agent.Wherein, the composite adhesive is organic viscous
Mixture and bentonitic mixture.
Further, as shown in Fig. 2, step S130 specifically includes following steps：
Step S131：Weigh the Iron Ore Powder of 90%-95.5%, 4%-7% treated solid waste containing magnesium and 0.5%-3%
Binder be uniformly mixed, formed mixture；
Step S132：Pelletizing is carried out to the mixture, control the green-ball moisture of formation 8.0%-9.0% it
Between；
In this step, the pelletizing carries out in former disk pelletizer, and suitable quantity of water is added when mixture is added, water is added to be
Mother bulb is formed faster in order to more preferable, and then mother bulb grows up to form green-ball, moisture also has remarkable effect, green-ball to deposit in globulation
In some strength greatly the reason is that there are capillary waters, formation capillary adhesion to have significantly to green-ball resistance to compression among miberal powder
It influences.Pelletizing moisture is excessively high, when be easy to form plasticity ball, second is that moisture is excessively high to influence subsequent drying process, and it is big
Measure waste of energy.Therefore control moisture is between 8.0%-9.0%.
Step S133：The green-ball of screening grain size 8-16mm is dried, preheats, roasting successively, soaking and cooling procedure, obtains
To the magnesia pellet.
Green-ball grain size is excessive, be susceptible to it is internal burn impermeable, cause internal endless without complete oxidation and solid-phase crystallization
Entirely, cause pellet strength too low；Grain size is too small, and burning machine bed permeability is poor, and blast furnace also there are certain requirements granularity, pelletizing grain
It spends carefully, is easy to cause the problems such as blast furnace pressure difference is high.Therefore control green-ball particle size range is in 8-16mm.
Wherein, the temperature of the drying is 300-450 DEG C, time 6-8min；The temperature of the preheating is 500-1000 DEG C,
Time 4-6min；The temperature of the roasting is 1150-1270 DEG C, time 7-10min；The temperature of the soaking is 1100-1150
DEG C, time 2-3min；Cooling requirement pelletizing temperature in 12-15 minutes is down to 150 DEG C or less.By containing to green-ball moisture
The control of amount and grain size, and dry, preheating, roasting, soaking and the control of cooling condition are combined, pelletizing quality can be improved, carried
The effect of high sinter quality.
Through the above as can be seen that the application passes through to containing with adding in pellet after magnesium solid waste is handled, in fact
The recycling of the solid waste containing magnesium is showed, while having reduced the additive amount of MgO in Iron Ore Powder, has effectively reduced magnesium in sinter and contain
It measures, MgO meeting and Fe during pellet roasting in solid waste containing magnesium2O3Stable magnesium ferrite is formed, to reduce the reduction of pellet
Expansion reduces SiO in pelletizing under the premise of ensureing reduction swellability rate2Content improves sinter quality.
In order to enable those skilled in the art further to understand the scheme of the embodiment of the present application, will be based below
The scheme that the embodiment of the present application is introduced describes to it in detail.
Progress roller mill and screening after the drying of solid waste containing magnesium that silicon steel production is generated, by more than 200 mesh screened out containing
Magnesium solid waste is used to produce magnesia pellet with less than 200 purpose solid wastes containing magnesium after carrying out profit mill together as raw material；Referring to Fig. 2 and
Fig. 3, weighs the Iron Ore Powder of 90%-95.5%, and the binder of 4%-7% treated solid wastes containing magnesium and 0.5%-3% are put into
It is uniformly mixed in mixing machine, forms mixture；The mixture is subjected to pelletizing in disc balling machine, side adds in balling process
Amount of water is added in mixture side, controls the green-ball moisture of formation between 8.0%-9.0%；Screen grain size 8-16mm's
Green-ball is dried, preheats, roasting successively, soaking and cooling procedure, obtains the magnesia pellet.
The ingredient of solid waste containing magnesium and moisture content are shown in Table 1.
1 ingredient of solid waste containing magnesium of table
Magnesia pellet is produced by raw material of the solid waste containing magnesium of serial number 1-1, the ingredient and technology controlling and process of pellet are shown in Table 2.
The ingredient and technology controlling and process of 2 magnesia pellet of table
Embodiment and the performance test results of the magnesia pellet of comparative example are shown in Table 3.
3 magnesia pellet technology controlling and process of table and the performance test results
As can be seen from Table 3, compared with comparative example D1, reduction swellability rate such as is rolled into a ball to control ball, can be increased suitable
Bentonite ore ratio (D2) inevitably will make blast furnace quantity of slag liter with addition of magnesia powder (D3), but due to increasing bentonite ore ratio
Height influences blast furnace index, and magnesia powder price is high, larger with addition of magnesia powder pelletizing cost increase amplitude.And the application
Embodiment in pellet by adding processed solid waste containing magnesium, compared with D1 is not added with solid waste containing magnesium, the embodiment of the present application
The reduction swellability rate for effectively reducing pellet, make reduction swellability rate control within 20%, compression strength also 2500N/P with
On, meet super-huge blast furnace feeding requirement.
One or more of embodiment of the present invention technical solution, has at least the following technical effects or advantages：
The resource utilization method of the solid waste provided by the embodiments of the present application containing magnesium, the method includes：Silicon steel is produced and is produced
Raw solid waste containing magnesium is first dried；Solid waste containing magnesium after drying is subjected to roller mill and screening, it is solid containing magnesium to screen out 200 mesh or more
It gives up and is less than 200 purpose solid wastes containing magnesium；By solid wastes containing magnesium more than 200 mesh screened out carry out after profit mill be less than 200 purposes
Solid waste containing magnesium matches to add in pellet together as raw material produces magnesia pellet.By carrying out processing with adding to containing magnesium solid waste
In pellet, the recycling of the solid waste containing magnesium is not only realized, additionally it is possible to Swelling of Pellets During Reduction rate is reduced, pelletizing quality is improved,
Meet the strategy of sustainable development.
It should be noted last that the above specific implementation mode is merely illustrative of the technical solution of the present invention and unrestricted,
Although being described the invention in detail with reference to example, it will be understood by those of ordinary skill in the art that, it can be to the present invention
Technical solution be modified or replaced equivalently, without departing from the spirit of the technical scheme of the invention and range, should all cover
In the scope of the claims of the present invention.
Claims (10)
1. a kind of resource utilization method of solid waste containing magnesium, which is characterized in that the method includes：
The solid waste containing magnesium that silicon steel production generates first is dried；
Solid waste containing magnesium after drying is subjected to roller mill and screening, 200 mesh or more solid waste containing magnesium is screened out and contains magnesium with less than 200 purposes
Solid waste；
By solid wastes containing magnesium more than 200 mesh screened out carry out after profit mill with less than 200 purpose solid wastes containing magnesium together as raw material
Magnesia pellet is produced with adding in pellet.
2. the resource utilization method of the solid waste containing magnesium as described in claim 1, which is characterized in that MgO in the solid waste containing magnesium
Content is more than 60%.
3. the resource utilization method of the solid waste containing magnesium as claimed in claim 2, which is characterized in that also wrapped in the solid waste containing magnesium
Include SiO2、Al2O3, FeO and TiO2。
4. the resource utilization method of the solid waste containing magnesium as described in claim 1, which is characterized in that solid containing magnesium after the drying
Useless moisture control is below 10%.
5. the resource utilization method of the solid waste containing magnesium as described in claim 1, which is characterized in that according to mass percent, institute
The chemical composition for stating magnesia pellet is：Iron Ore Powder 90%-95.5%, solid waste containing magnesium that treated 4%-7%, binder
0.5%-3%.
6. the resource utilization method of the solid waste containing magnesium as claimed in claim 5, which is characterized in that the Iron Ore Powder is concentrate
Powder, the concentrate powder are selected from magnetite powder or ground hematite.
7. the resource utilization method of the solid waste containing magnesium as claimed in claim 6, which is characterized in that the granularity of the concentrate powder exists
200 mesh accounting below reaches 80% or more.
8. the resource utilization method of the solid waste containing magnesium as claimed in claim 5, which is characterized in that the binder is bentonite
Or compound binding agent.
9. the resource utilization method of the solid waste containing magnesium as described in claim 1 or 5, which is characterized in that the magnesia pellet
Production method specifically include：
Weigh the Iron Ore Powder of 90%-95.5%, the binder mixing of 4%-7% treated solid wastes containing magnesium and 0.5%-3%
Uniformly, mixture is formed；
Pelletizing is carried out to the mixture, controls the green-ball moisture of formation between 8.0%-9.0%；
The green-ball of screening grain size 8-16mm is dried, preheats, roasting successively, soaking and cooling procedure, obtains the magnesia ball
Nodulizing.
10. the resource utilization method of the solid waste containing magnesium as claimed in claim 9, which is characterized in that the temperature of the drying is
300-450 DEG C, time 6-8min；The temperature of the preheating is 500-1000 DEG C, time 4-6min；The temperature of the roasting is
1150-1270 DEG C, time 7-10min；The temperature of the soaking is 1100-1150 DEG C, time 2-3min.
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| CN201810314008.3A CN108611487A (en) | 2018-04-04 | 2018-04-04 | A kind of resource utilization method of the solid waste containing magnesium |
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| CN201810314008.3A CN108611487A (en) | 2018-04-04 | 2018-04-04 | A kind of resource utilization method of the solid waste containing magnesium |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113667822A (en) * | 2021-07-15 | 2021-11-19 | 江西理工大学 | Method for recovering neodymium iron boron waste through magnesium roasting |
| CN113667819A (en) * | 2021-07-15 | 2021-11-19 | 江西理工大学 | Method for separating and recycling neodymium iron boron waste materials through zinc roasting |
| CN114763581A (en) * | 2021-01-15 | 2022-07-19 | 宝山钢铁股份有限公司 | Solid waste pelletizing process and efficient sintering method thereof |
| CN114763582A (en) * | 2021-01-15 | 2022-07-19 | 宝山钢铁股份有限公司 | Method for producing magnesium pellets by using oriented silicon steel magnesium oxide waste |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114763581A (en) * | 2021-01-15 | 2022-07-19 | 宝山钢铁股份有限公司 | Solid waste pelletizing process and efficient sintering method thereof |
| CN114763582A (en) * | 2021-01-15 | 2022-07-19 | 宝山钢铁股份有限公司 | Method for producing magnesium pellets by using oriented silicon steel magnesium oxide waste |
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| CN113667819A (en) * | 2021-07-15 | 2021-11-19 | 江西理工大学 | Method for separating and recycling neodymium iron boron waste materials through zinc roasting |
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Application publication date: 20181002 |