CN112176201A - Comprehensive utilization method of low-grade magnesite - Google Patents
Comprehensive utilization method of low-grade magnesite Download PDFInfo
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- CN112176201A CN112176201A CN202010846617.0A CN202010846617A CN112176201A CN 112176201 A CN112176201 A CN 112176201A CN 202010846617 A CN202010846617 A CN 202010846617A CN 112176201 A CN112176201 A CN 112176201A
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- 239000001095 magnesium carbonate Substances 0.000 title claims abstract description 87
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 title claims abstract description 87
- 229910000021 magnesium carbonate Inorganic materials 0.000 title claims abstract description 87
- 235000014380 magnesium carbonate Nutrition 0.000 title claims abstract description 87
- 238000000034 method Methods 0.000 title claims abstract description 47
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 66
- 239000011777 magnesium Substances 0.000 claims abstract description 64
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 64
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 49
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 claims abstract description 38
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims abstract description 35
- 239000002006 petroleum coke Substances 0.000 claims abstract description 33
- 238000006243 chemical reaction Methods 0.000 claims abstract description 30
- 239000000203 mixture Substances 0.000 claims abstract description 24
- 238000005660 chlorination reaction Methods 0.000 claims abstract description 15
- 238000007599 discharging Methods 0.000 claims abstract description 10
- 230000000694 effects Effects 0.000 claims abstract description 6
- 239000002912 waste gas Substances 0.000 claims description 18
- 239000002699 waste material Substances 0.000 claims description 15
- 238000007670 refining Methods 0.000 claims description 14
- 238000004806 packaging method and process Methods 0.000 claims description 13
- 230000005484 gravity Effects 0.000 claims description 12
- 238000005554 pickling Methods 0.000 claims description 11
- 238000000926 separation method Methods 0.000 claims description 11
- 238000005406 washing Methods 0.000 claims description 10
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 8
- 235000010755 mineral Nutrition 0.000 claims description 8
- 239000011707 mineral Substances 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 7
- 239000003792 electrolyte Substances 0.000 claims description 7
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- 239000002351 wastewater Substances 0.000 claims description 6
- 238000012216 screening Methods 0.000 claims description 5
- 230000003472 neutralizing effect Effects 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 2
- 238000006386 neutralization reaction Methods 0.000 claims description 2
- 238000003723 Smelting Methods 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 4
- 239000000047 product Substances 0.000 abstract description 3
- 239000006227 byproduct Substances 0.000 abstract description 2
- 150000003839 salts Chemical class 0.000 abstract description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- C22B26/00—Obtaining alkali, alkaline earth metals or magnesium
- C22B26/20—Obtaining alkaline earth metals or magnesium
- C22B26/22—Obtaining magnesium
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/04—Electrolytic production, recovery or refining of metals by electrolysis of melts of magnesium
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
The invention discloses a comprehensive utilization method of low-grade magnesite, which comprises the following steps: step a: crushing magnesite by a crusher, crushing petroleum coke by the crusher, and mixing and proportioning the crushed magnesite and the crushed petroleum coke by mixing equipment; step b: transporting the mixture to a reaction furnace by a user, introducing liquid chlorine into the reaction furnace by the user, chlorinating the mixture by the liquid chlorine, and obtaining anhydrous magnesium chloride melt after chlorination; step c: the anhydrous magnesium chloride melt is transported by the user to the electrolysis apparatus. The invention takes magnesite as raw material, and produces magnesium metal by smelting magnesium with molten salt electrolysis method, which not only provides high-quality magnesium smelting raw material for electrolysis, but also utilizes chlorine gas as byproduct of magnesium electrolysis, so that the product quality is controllable in the processing process of magnesite, the labor intensity of operators is low, the energy-saving effect is good, the demands of the current market are satisfied, and the problem of low quality of magnesite discharging in the past is solved.
Description
Technical Field
The invention relates to the technical field of ore processing, in particular to a comprehensive utilization method of low-grade magnesite.
Background
At present, magnesite belonging to special mineral resources is mined for a long time, the storage capacity of the magnesite is greatly reduced, and the magnesite is processed in a traditional mode that poor magnesite is abandoned and rich magnesite is abandoned, so that a large amount of low-grade magnesite is abandoned, tailings after mineral separation cause resource waste and new pollution, even invade farmlands or mountain forests, in addition, due to the fact that the traditional process technology is laggard, the problems that the product quality is uncontrollable, the labor intensity of operators is high, the energy-saving effect is poor and the like exist in the processing process of the magnesite, the requirements of the current market cannot be met, and due to the problems, a low-grade magnesite comprehensive utilization method is purposefully developed.
Disclosure of Invention
The invention aims to provide a comprehensive utilization method of low-grade magnesite, which has the advantages of energy conservation, environmental protection and high discharging quality and solves the problem of low discharging quality of the traditional magnesite.
In order to achieve the purpose, the invention provides the following technical scheme: the comprehensive utilization method of the low-grade magnesite comprises the following steps:
step a: crushing magnesite by a crusher, crushing petroleum coke by the crusher, and mixing and proportioning the crushed magnesite and the crushed petroleum coke by mixing equipment;
step b: transporting the mixture to a reaction furnace by a user, introducing liquid chlorine into the reaction furnace by the user, chlorinating the mixture by the liquid chlorine, and obtaining anhydrous magnesium chloride melt after chlorination;
step c: transporting the anhydrous magnesium chloride melt to electrolysis equipment by a user, and electrolyzing the anhydrous magnesium chloride melt by the electrolysis equipment to obtain crude magnesium by electrolysis;
step d: purifying and refining the crude magnesium by a user to obtain a magnesium ingot;
step e: and pickling and packaging the magnesium ingot by a user to obtain the commodity magnesium.
Preferably, after the magnesite and the petroleum coke are crushed in the step a, the crushed magnesite and petroleum coke are screened by a screening device, and the granularity of the screened magnesite and petroleum coke is 0.5 mm.
Preferably, waste gas is generated in the chlorination process in the step b, the waste gas is washed by a purifying liquid by a user, the washed waste gas is discharged through a chimney, the washed waste water is neutralized by the user, and the neutralized waste water is discharged through a pipeline.
Preferably, chlorine gas is generated in the electrolysis process of the step c, and the chlorine gas is pressurized by a user to obtain liquid chlorine, so that the liquid chlorine is recycled.
Preferably, the cathode generates waste gas during the electrolysis in the step c, the waste gas is neutralized by a user, and the neutralized waste gas is discharged into the air.
Preferably, the waste slag and the waste electrolyte generated in the electrolysis process in the step c are collected and stored by a user, and finally transported to a designated position for centralized treatment.
Preferably, the step d adopts a gravity separation method for purification and refining, wherein the gravity separation method is a method for separation by using the density difference between magnesite and impurity minerals, and mainly adopts jigging, shaking tables, heavy media and other methods, because the specific gravity difference between the magnesite and gangue minerals is not large, the effect of directly treating the magnesite by using the gravity separation method is poor, but after the magnesite is calcined for 30 minutes, the density of the magnesite can be reduced to 1.3g/cm 3-1.4 g/cm3 from 2.7g/cm 3-2.8 g/cm 3.
Preferably, the roasting temperature of the reaction furnace in the step b is 650 ℃, and the roasting time of the reaction furnace is 1 h.
Preferably, the step e is performed with acid washing by using a sulfuric acid solution, the acid washing time is 50-60 seconds, and the magnesium ingot is washed, dried and packaged after the acid washing.
Compared with the prior art, the invention has the following beneficial effects:
the invention takes magnesite as raw material, and produces magnesium metal by smelting magnesium with molten salt electrolysis method, which not only provides high-quality magnesium smelting raw material for electrolysis, but also utilizes chlorine gas as byproduct of magnesium electrolysis, so that the product quality is controllable in the processing process of magnesite, the labor intensity of operators is low, the energy-saving effect is good, the demands of the current market are satisfied, and the problem of low quality of magnesite discharging in the past is solved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The comprehensive utilization method of the low-grade magnesite comprises the following steps:
step a: crushing magnesite by a crusher, crushing petroleum coke by the crusher, and mixing and proportioning the crushed magnesite and the crushed petroleum coke by mixing equipment;
step b: transporting the mixture to a reaction furnace by a user, introducing liquid chlorine into the reaction furnace by the user, chlorinating the mixture by the liquid chlorine, and obtaining anhydrous magnesium chloride melt after chlorination;
step c: transporting the anhydrous magnesium chloride melt to electrolysis equipment by a user, and electrolyzing the anhydrous magnesium chloride melt by the electrolysis equipment to obtain crude magnesium by electrolysis;
step d: purifying and refining the crude magnesium by a user to obtain a magnesium ingot;
step e: and pickling and packaging the magnesium ingot by a user to obtain the commodity magnesium.
Example 1
The comprehensive utilization method of the low-grade magnesite comprises the following steps: step a: crushing magnesite by a crusher, crushing petroleum coke by the crusher, and mixing and proportioning the crushed magnesite and the crushed petroleum coke by mixing equipment; step b: transporting the mixture to a reaction furnace by a user, introducing liquid chlorine into the reaction furnace by the user, chlorinating the mixture by the liquid chlorine, and obtaining anhydrous magnesium chloride melt after chlorination; step c: transporting the anhydrous magnesium chloride melt to electrolysis equipment by a user, and electrolyzing the anhydrous magnesium chloride melt by the electrolysis equipment to obtain crude magnesium by electrolysis; step d: purifying and refining the crude magnesium by a user to obtain a magnesium ingot; step e: and pickling and packaging the magnesium ingot by a user to obtain the commodity magnesium.
Example 2
In example 1, the following additional steps were added:
and a, crushing the magnesite and the petroleum coke, and screening the crushed magnesite and petroleum coke by a screening device, wherein the granularity of the screened magnesite and petroleum coke is 0.5 mm.
The comprehensive utilization method of the low-grade magnesite comprises the following steps: step a: crushing magnesite by a crusher, crushing petroleum coke by the crusher, and mixing and proportioning the crushed magnesite and the crushed petroleum coke by mixing equipment; step b: transporting the mixture to a reaction furnace by a user, introducing liquid chlorine into the reaction furnace by the user, chlorinating the mixture by the liquid chlorine, and obtaining anhydrous magnesium chloride melt after chlorination; step c: transporting the anhydrous magnesium chloride melt to electrolysis equipment by a user, and electrolyzing the anhydrous magnesium chloride melt by the electrolysis equipment to obtain crude magnesium by electrolysis; step d: purifying and refining the crude magnesium by a user to obtain a magnesium ingot; step e: and pickling and packaging the magnesium ingot by a user to obtain the commodity magnesium.
Example 3
In example 1, the following additional steps were added:
and b, generating waste gas in the chlorination process, washing the waste gas by using a purifying liquid through a user, discharging the washed waste gas through a chimney, neutralizing the washed waste water through the user, and discharging the neutralized waste water through a pipeline.
Example 4
In example 1, the following additional steps were added:
and c, chlorine gas is generated in the electrolysis process of the step c, and the chlorine gas is pressurized by a user to obtain liquid chlorine, so that the liquid chlorine is recycled.
The comprehensive utilization method of the low-grade magnesite comprises the following steps: step a: crushing magnesite by a crusher, crushing petroleum coke by the crusher, and mixing and proportioning the crushed magnesite and the crushed petroleum coke by mixing equipment; step b: transporting the mixture to a reaction furnace by a user, introducing liquid chlorine into the reaction furnace by the user, chlorinating the mixture by the liquid chlorine, and obtaining anhydrous magnesium chloride melt after chlorination; step c: transporting the anhydrous magnesium chloride melt to electrolysis equipment by a user, and electrolyzing the anhydrous magnesium chloride melt by the electrolysis equipment to obtain crude magnesium by electrolysis; step d: purifying and refining the crude magnesium by a user to obtain a magnesium ingot; step e: and pickling and packaging the magnesium ingot by a user to obtain the commodity magnesium.
Example 5
In example 1, the following additional steps were added:
and c, generating waste gas by the cathode in the electrolysis process of the step c, neutralizing the waste gas by a user, and discharging the waste gas into the air after neutralization.
The comprehensive utilization method of the low-grade magnesite comprises the following steps: step a: crushing magnesite by a crusher, crushing petroleum coke by the crusher, and mixing and proportioning the crushed magnesite and the crushed petroleum coke by mixing equipment; step b: transporting the mixture to a reaction furnace by a user, introducing liquid chlorine into the reaction furnace by the user, chlorinating the mixture by the liquid chlorine, and obtaining anhydrous magnesium chloride melt after chlorination; step c: transporting the anhydrous magnesium chloride melt to electrolysis equipment by a user, and electrolyzing the anhydrous magnesium chloride melt by the electrolysis equipment to obtain crude magnesium by electrolysis; step d: purifying and refining the crude magnesium by a user to obtain a magnesium ingot; step e: and pickling and packaging the magnesium ingot by a user to obtain the commodity magnesium.
Example 6
In example 1, the following additional steps were added:
and c, generating waste residues and waste electrolyte in the electrolysis process, collecting and storing the waste residues and the waste electrolyte by a user, and finally transporting the waste residues and the waste electrolyte to a specified position for centralized treatment.
The comprehensive utilization method of the low-grade magnesite comprises the following steps: step a: crushing magnesite by a crusher, crushing petroleum coke by the crusher, and mixing and proportioning the crushed magnesite and the crushed petroleum coke by mixing equipment; step b: transporting the mixture to a reaction furnace by a user, introducing liquid chlorine into the reaction furnace by the user, chlorinating the mixture by the liquid chlorine, and obtaining anhydrous magnesium chloride melt after chlorination; step c: transporting the anhydrous magnesium chloride melt to electrolysis equipment by a user, and electrolyzing the anhydrous magnesium chloride melt by the electrolysis equipment to obtain crude magnesium by electrolysis; step d: purifying and refining the crude magnesium by a user to obtain a magnesium ingot; step e: and pickling and packaging the magnesium ingot by a user to obtain the commodity magnesium.
Example 7
In example 1, the following additional steps were added:
and d, purifying and refining by adopting a gravity separation method, wherein the gravity separation method is a method for separating by utilizing the density difference between magnesite and impurity minerals, and mainly comprises the methods of jigging, shaking tables, heavy media and the like, and the effect of directly treating the magnesite by using the gravity separation method is poor because the specific gravity difference between the magnesite and gangue minerals is not large, but the density of the magnesite can be reduced to 1.3g/cm 3-1.4 g/cm3 from 2.7g/cm 3-2.8 g/cm3 after the magnesite is calcined for 30 minutes.
The comprehensive utilization method of the low-grade magnesite comprises the following steps: step a: crushing magnesite by a crusher, crushing petroleum coke by the crusher, and mixing and proportioning the crushed magnesite and the crushed petroleum coke by mixing equipment; step b: transporting the mixture to a reaction furnace by a user, introducing liquid chlorine into the reaction furnace by the user, chlorinating the mixture by the liquid chlorine, and obtaining anhydrous magnesium chloride melt after chlorination; step c: transporting the anhydrous magnesium chloride melt to electrolysis equipment by a user, and electrolyzing the anhydrous magnesium chloride melt by the electrolysis equipment to obtain crude magnesium by electrolysis; step d: purifying and refining the crude magnesium by a user to obtain a magnesium ingot; step e: and pickling and packaging the magnesium ingot by a user to obtain the commodity magnesium.
Example 8
In example 1, the following additional steps were added:
in the step b, the roasting temperature of the reaction furnace is 650 ℃, and the roasting time of the reaction furnace is 1 h.
The comprehensive utilization method of the low-grade magnesite comprises the following steps: step a: crushing magnesite by a crusher, crushing petroleum coke by the crusher, and mixing and proportioning the crushed magnesite and the crushed petroleum coke by mixing equipment; step b: transporting the mixture to a reaction furnace by a user, introducing liquid chlorine into the reaction furnace by the user, chlorinating the mixture by the liquid chlorine, and obtaining anhydrous magnesium chloride melt after chlorination; step c: transporting the anhydrous magnesium chloride melt to electrolysis equipment by a user, and electrolyzing the anhydrous magnesium chloride melt by the electrolysis equipment to obtain crude magnesium by electrolysis; step d: purifying and refining the crude magnesium by a user to obtain a magnesium ingot; step e: and pickling and packaging the magnesium ingot by a user to obtain the commodity magnesium.
Example 9
In example 1, the following additional steps were added:
and e, adopting sulfuric acid solution to carry out acid washing for 50-60 seconds, and after acid washing, cleaning and drying the magnesium ingot and then packaging.
The comprehensive utilization method of the low-grade magnesite comprises the following steps: step a: crushing magnesite by a crusher, crushing petroleum coke by the crusher, and mixing and proportioning the crushed magnesite and the crushed petroleum coke by mixing equipment; step b: transporting the mixture to a reaction furnace by a user, introducing liquid chlorine into the reaction furnace by the user, chlorinating the mixture by the liquid chlorine, and obtaining anhydrous magnesium chloride melt after chlorination; step c: transporting the anhydrous magnesium chloride melt to electrolysis equipment by a user, and electrolyzing the anhydrous magnesium chloride melt by the electrolysis equipment to obtain crude magnesium by electrolysis; step d: purifying and refining the crude magnesium by a user to obtain a magnesium ingot; step e: and pickling and packaging the magnesium ingot by a user to obtain the commodity magnesium.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The comprehensive utilization method of the low-grade magnesite is characterized by comprising the following steps: the method comprises the following steps:
step a: crushing magnesite by a crusher, crushing petroleum coke by the crusher, and mixing and proportioning the crushed magnesite and the crushed petroleum coke by mixing equipment;
step b: transporting the mixture to a reaction furnace by a user, introducing liquid chlorine into the reaction furnace by the user, chlorinating the mixture by the liquid chlorine, and obtaining anhydrous magnesium chloride melt after chlorination;
step c: transporting the anhydrous magnesium chloride melt to electrolysis equipment by a user, and electrolyzing the anhydrous magnesium chloride melt by the electrolysis equipment to obtain crude magnesium by electrolysis;
step d: purifying and refining the crude magnesium by a user to obtain a magnesium ingot;
step e: and pickling and packaging the magnesium ingot by a user to obtain the commodity magnesium.
2. The method for comprehensively utilizing low-grade magnesite according to claim 1, characterized by comprising the following steps: and a, crushing the magnesite and the petroleum coke, and screening the crushed magnesite and petroleum coke by a screening device, wherein the granularity of the screened magnesite and petroleum coke is 0.5 mm.
3. The method for comprehensively utilizing low-grade magnesite according to claim 1, characterized by comprising the following steps: and b, generating waste gas in the chlorination process in the step b, washing the waste gas by using a purifying liquid through a user, discharging the washed waste gas through a chimney, neutralizing the washed waste water by using the user, and discharging the neutralized waste water through a pipeline.
4. The method for comprehensively utilizing low-grade magnesite according to claim 1, characterized by comprising the following steps: and c, chlorine gas is generated in the electrolysis process of the step c, and the chlorine gas is pressurized by a user to obtain liquid chlorine, so that the liquid chlorine is recycled.
5. The method for comprehensively utilizing low-grade magnesite according to claim 1, characterized by comprising the following steps: and c, generating waste gas by the cathode in the electrolysis process of the step c, neutralizing the waste gas by a user, and discharging the waste gas into the air after neutralization.
6. The method for comprehensively utilizing low-grade magnesite according to claim 1, characterized by comprising the following steps: and c, generating waste residues and waste electrolyte in the electrolysis process, collecting and storing the waste residues and the waste electrolyte by a user, and finally transporting the waste residues and the waste electrolyte to a specified position for centralized treatment.
7. The method for comprehensively utilizing low-grade magnesite according to claim 1, characterized by comprising the following steps: and d, purifying and refining by adopting a gravity separation method, wherein the gravity separation method is a method for separating by utilizing the density difference between magnesite and impurity minerals, and mainly comprises the methods of jigging, shaking tables, heavy media and the like, and the effect of directly treating the magnesite by using the gravity separation method is poor because the specific gravity difference between the magnesite and gangue minerals is not large, but the density of the magnesite can be reduced to 1.3g/cm 3-1.4 g/cm3 from 2.7g/cm 3-2.8 g/cm3 after the magnesite is calcined for 30 minutes.
8. The method for comprehensively utilizing low-grade magnesite according to claim 1, characterized by comprising the following steps: and in the step b, the roasting temperature of the reaction furnace is 650 ℃, and the roasting time of the reaction furnace is 1 h.
9. The method for comprehensively utilizing low-grade magnesite according to claim 1, characterized by comprising the following steps: and e, adopting a sulfuric acid solution to carry out acid washing for 50-60 seconds, and washing and drying the magnesium ingot after acid washing and then packaging.
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| CN202010846617.0A CN112176201A (en) | 2020-08-21 | 2020-08-21 | Comprehensive utilization method of low-grade magnesite |
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| CN202010846617.0A CN112176201A (en) | 2020-08-21 | 2020-08-21 | Comprehensive utilization method of low-grade magnesite |
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|---|---|---|---|---|
| GB825872A (en) * | 1955-06-20 | 1959-12-23 | Ichiro Egami | Improvements in or relating to the electrolytic production of magnesium |
| AU7349587A (en) * | 1986-05-29 | 1987-12-03 | Pamour Inc. | Production of pure MgC12 solution suitable for the production of magnesium 2 metal from an impure magnesite ore or concentrate |
| CN1143693A (en) * | 1995-06-09 | 1997-02-26 | 通用汽车公司 | Electrolytic production process for magnesium and its alloys |
| CN1663913A (en) * | 2004-12-14 | 2005-09-07 | 北京科技大学 | A kind of method for producing magnesium metal as raw material of bischofite |
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| CN102534196A (en) * | 2010-12-14 | 2012-07-04 | 贵阳铝镁设计研究院有限公司 | Chlorination process for pressing magnesite into balls through light burning dry method |
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-
2020
- 2020-08-21 CN CN202010846617.0A patent/CN112176201A/en active Pending
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|---|---|---|---|---|
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| AU7349587A (en) * | 1986-05-29 | 1987-12-03 | Pamour Inc. | Production of pure MgC12 solution suitable for the production of magnesium 2 metal from an impure magnesite ore or concentrate |
| CN1143693A (en) * | 1995-06-09 | 1997-02-26 | 通用汽车公司 | Electrolytic production process for magnesium and its alloys |
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