CN110127643A - A kind of technique that red mud step-by-step processing realizes comprehensive utilization - Google Patents
A kind of technique that red mud step-by-step processing realizes comprehensive utilization Download PDFInfo
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- CN110127643A CN110127643A CN201910402383.8A CN201910402383A CN110127643A CN 110127643 A CN110127643 A CN 110127643A CN 201910402383 A CN201910402383 A CN 201910402383A CN 110127643 A CN110127643 A CN 110127643A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/18—Phosphoric acid
- C01B25/185—Preparation neither from elemental phosphorus or phosphoric anhydride nor by reacting phosphate-containing material with an acid, e.g. by reacting phosphate-containing material with an ion-exchange resin or an acid salt used alone
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
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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
- C22B1/005—Preliminary treatment of scrap
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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
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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
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
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- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Treatment Of Sludge (AREA)
- Processing Of Solid Wastes (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses the techniques that a kind of red mud step-by-step processing realizes comprehensive utilization.The technical process are as follows: water, red mud, material containing fe and surfactant are mixed and sized mixing, slurry carries out hydrothermal reduction reaction, and reaction obtained solid product passes through the isolated magnetic iron ore of magnetic separation and magnetic separation residue；Magnetic separation residue and apatites mixed carry out high-temperature fusion, and escaping gas absorbs to obtain phosphoric acid by water spray during high-temperature fusion, and the liquid slag of generation is as cement raw material.The technique mainly obtains high added value magnetic iron ore, phosphoric acid and cement raw material product using red mud waste and cheap apatite as raw material, and resource utilization is high, and discharges without waste residue and exhaust gas, will not bring secondary pollution to environment；The technical process is simple, raw material is easy to get, strong operability, and red mud can be turned waste into wealth, have preferable economic and social benefit.
Description
Technical field
The present invention relates to the rings that a kind of red mud treatment process more particularly to a kind of red mud step-by-step processing realize comprehensive utilization
New process is protected, metallurgy and environment protection field are belonged to.
Background technique
Bauxite is using gibbsite, a diaspore as the general designation of ore composed by essential mineral, which is production
The optimum feed stock of metallic aluminium, dosage account for 90% or more of world's bauxite total output.It is provided according to US Geological Survey
Data, the stock number of bauxite is about 550~75,000,000,000 tons in the world, and the reserves of two provinces and regions aluminum ore of Yunnan Province of China and Guangxi are super
1,000,000,000 tons are crossed, and higher from the iron-content in the bauxite of this two provinces paneling, wherein the total content of aluminium oxide and iron oxide is just
More than 70%.Red mud is the pollution waste residue being discharged when aluminium industry extracts aluminium oxide from bauxite.1 ton of oxygen of usual every production
Change aluminium, just incidentally generates 1~2 ton of red mud.The annual red mud discharge amount in China reaches tens million of tons, but due to the restriction of various factors,
Red mud is difficult to make full use of always.Currently, wet process stockpiling, but the method meeting are stacked or built a dam to red mud all in stockyard by many factories
It penetrates into a large amount of spent lyes in soil nearby, causes alkalization of soils and bogginess, and polluted surface underground water source.In addition,
Dry method is stored up again after having part factory to be dehydrated red mud drying.Due to containing a large amount of advantageous elements in red mud, no matter it adopts
Which kind of stockpiling mode is taken, is all the significant wastage to earth limited resources.As the development of aluminum processing product and bauxite are sampled
Reduction year by year, the discharge amount of red mud will be increasing.Therefore, red mud is reasonably handled and utilized, current green hair is met
Exhibition theory is conducive to the sustainable development of human society and resource.
For the secondary use for realizing red mud, those skilled in the art have carried out long-term exploration.For example, Chinese patent (CN
The method of comprehensive utilization of a kind of metallurgy of aluminium red mud and high ferrophosphorus 201210497818.X) is disclosed, and raw material uses the high ferrophosphorus of powdery
Mine, powdery red mud and coal dust, by mixing, heating reduction and magnetic separation and etc. obtain bloodstone or magnetic iron ore or iron ore concentrate, should
Method and process is simple, low in cost, but product is single, and non-magnetic separation part does not utilize after magnetic separation, and resource utilization can also be further
It improves；Chinese patent (CN201710291417) discloses a kind of method of comprehensive utilization of alumina laterite, and this method uses vacuum
Thermal reduction handles red mud makes iron oxide be reduced to metallic iron under vacuum conditions using carbon or aluminium as reducing agent, and separation is used for
Reduced iron powder is produced, so that sodium oxide molybdena is reduced to metallic sodium and is distilled off, while other valuable materials being made to be reduced to metal
State simultaneously forms alloy with aluminium, and this method can realize that red mud harmless processing and valuable element recycle, without exhaust gas, waste water
With the secondary pollutions such as waste residue, but its process flow is longer, and the requirement of vacuum reduction and distillation to equipment is relatively high, is produced into
This is relatively high；Chinese patent (201710126298.4) disclose it is a kind of red mud is mixed with calcareous dealkalize agent, is stirred, be made red
The calcareous dealkalize agent mixing slurry of mud-, the calcareous dealkalize agent mixing slurry of red mud-and the sulfur-containing smoke gas counter current contacting in tower absorb titanium dioxide
Sulphur, the discharge of desulfurization fume tower top, red mud mixing slurry are discharged by tower bottom, and red mud mixing slurry continues with obtained normal silicate water
The method of mud, this method can utilize industrial residue, flue gas high-efficiency desulfurization and the efficient dealkalize of red mud, but not be suitable for not obtaining
The factory of a large amount of sulfur-containing smoke gas, cannot be widely applied；Chinese patent (CN201811246887) discloses a kind of red mud magnetic
Change roasting utilization system and technique, technique is by several sections of mixing, drying, reduction roasting, magnetic separation separation, tailings characteristic etc.
Composition, may finally obtain Iron Ore Powder and construction material, which can solve conventional magnetized roasting and restore red mud using lignite
Red mud comprehensive utilization ratio is improved because of the problem that ash content height causes reaction efficiency low, and by Optimal improvements magnetizing roast equipment, but
Each of which production stage is subdivided into many techniques, and overall craft is long, is unfavorable for improving production efficiency；Meanwhile the technique also makes
With corrosive reagents such as sulfuric acid, there are certain security risks.
Summary of the invention
For defect existing for red mud treatment process in the prior art, the purpose of the present invention is intended to provide a kind of by red mud
By substeps treatment process such as hydrothermal reduction, magnetic separation, apatite high-temperature fusions to recycle magnetic iron ore, phosphoric acid and cement raw material three
Kind can sell product, be truly realized the technique that red mud comprehensive resource utilizes, which is mainly honest and clean with red mud and apatite
Valence raw material, and simple process, strong operability, technique do not generate waste residue and exhaust gas, will not generate secondary pollution to environment, should
Technique widens red mud comprehensive Utilization Ways, alleviates red mud processing pressure generally existing in world wide.
In order to achieve the above technical purposes, the technique comprehensively utilized is realized the present invention provides a kind of red mud step-by-step processing,
The technique the following steps are included:
1) water, red mud, material containing fe and surfactant are mixed, stirring is sized mixing, and red mud slurry is obtained；
2) red mud slurry is transferred in autoclave, is carried out hydrothermal reduction reaction, is obtained mix products；
3) for the mix products by being separated by solid-liquid separation, gained slag phase passes through the isolated magnetic iron ore of magnetic separation and magnetic separation residue；
4) the magnetic separation residue and apatites mixed, are pressed into pelletizing；
5) pelletizing, which is placed in protective atmosphere, carries out high-temperature fusion, and escaping gas passes through water during high-temperature fusion
Spray-absorption obtains phosphoric acid, and the liquid slag that high-temperature fusion process generates is as cement raw material.
Preferred scheme, the red mud include at least one in Bayer process red mud, red mud from sintering process or combination method red mud
Kind.
Preferred scheme, the water content of the red mud are 5~10%.
Preferred scheme, the fe material include at least one of waste iron filing, iron powder.Fe material is mainly made
Can be by ferric iron selective reduction in red mud at magnetic iron ore for reducing agent use, other opposite reducing agents are in hydro-thermal reaction mistake
The production rate of vignite can be improved in journey, to be conducive to improve the rate of recovery of iron.
Preferred scheme, the surfactant include polyethylene glycol.
Preferred scheme, water, red mud, material containing fe and surfactant mass ratio be (30~45): (25~
35): (5~10): (1~3).
Preferred scheme, the condition of the hydrothermal reduction reaction are as follows: increase pressure is 1~3MPa, and temperature is 140~230
DEG C, the time is 30~50min.Facilitate hydrothermal reduction reaction by suitably pressurization in hydrothermal reaction process to accelerate, mention
High magnetic iron ore production rate.
Preferred scheme, the magnetic separation strength are 120~160kA/m.
The mass ratio of preferred scheme, magnetic separation residue and apatite is (7~8): (3~5).Apatite is for adjusting magnetic
Calcium aluminium in residue when calcium silicon ratio is selected, is conducive to generate stable ca aluminosilicate system in high temperature solid-state, can be used as cement
Raw material, and the P that apatite is generated by thermal decomposition4O6It can drench to absorb by water and obtain phosphorous acid, phosphorous acid is after air oxidation
It is gradually converted into phosphoric acid.The P generated using apatite pyrolysis4O6It can sufficiently be recycled, no exhaust gas generates.
Preferred scheme, the condition of the high-temperature fusion are as follows: temperature is 1600~1700 DEG C, and the time is 30~40 min.
Be conducive to the generation of ca aluminosilicate system and P under preferred melting temperature4O6Volatilization.
Preferred scheme, protective atmosphere are inert atmosphere (such as argon gas) and/or nitrogen.
Red mud step-by-step processing technique of the invention, comprising the following specific steps
(1) it pre-processes: by water, red mud, fe material and surfactant (such as polyethylene glycol) according to (30~45):
(25~35): (5~10): the mixing of (1~3) proportion is uniformly mixing to obtain red mud slurry；
(2) reduction treatment: the red mud slurry is placed in hydrothermal reaction kettle, and heating pressurization, moulding pressure is 1~3MPa,
Heat preservation is 30~50min under conditions of temperature is 140~230 DEG C, carries out hydrothermal reduction reaction, obtains reaction mixture.
(3) magnetic separation is handled: being separated by solid-liquid separation the reaction mixture to obtain mixed solution and solid slag, by the solid-state
After slag is sufficiently dried at a temperature of 40~90 DEG C, is broken, uses intensity to carry out magnetic separation for the magnetic field 120~160kA/m and obtain magnet
Mine and magnetic separation residue, the magnetic iron ore are used as iron-smelting raw material.
(4) forming processes: by the magnetic separation residue and apatite according to (7~8): the mixing of (3~5) quality proportioning is broken
It is broken, form and be dried to obtain mixing pelletizing；Briquetting pressure is 10~14MPa, and drying temperature is 50~60 DEG C, and drying time is
15~30min, the diameter for mixing pelletizing is 10~15mm.
(5) melt process: being 1600~1700 in temperature by the mixing pelletizing in electric furnace under inert gas shielding
High-temperature fusion handles 30~40min and obtains liquid slag under the conditions of DEG C, and escaping gas is sprayed in absorption tower with water in melting process
Leaching obtains phosphoric acid, and the liquid slag is used as cement raw material after trimming.
In addition, in technical solution of the present invention, all do not do is illustrated, the routine in this field can be used
Means realize the technical program.
Red mud step-by-step processing of the invention realizes the environment-protective process of comprehensive utilization, first by red mud, water, object containing fe
Expect that the red mud slurry of (waste iron filing or/and iron powder) and surfactant (polyethylene glycol) mixing, stirring composition is first in autoclave
Middle progress hydrothermal reduction reaction, in hydrothermal reduction reaction process, using material containing fe as reducing agent, key reaction
Formula is as follows: Fe+4Fe2O3=3Fe3O4, in the presence of fe, iron oxide (Fe2O3) hydrothermal reduction generation magnetic iron ore (Fe3O4)
Reaction need to undergo two processes: (1) iron powder and brown iron oxide dissolution is respectively formed Fe (OH)3 -With Fe (OH)4 -；(2)Fe
(OH)3 -With Fe (OH)4 -Further reaction generates magnetic iron ore (Fe3O4), reaction equation are as follows: Fe (OH)3 -+2Fe(OH)4 -=Fe3O4+
3OH-+4H2O.The magnetic iron ore of generation can be separated by magnetic separation, and magnetic separation residue is mainly by Al2O3, CaO and SiO2Deng composition.Magnetic
It selects residue further to carry out high temperature solid state reaction with the apatite suitably matched and generates ca aluminosilicate system, pass through ingredient tune
It is whole to can be used as production cement raw material.Apatite is the phosphate mineral general name of a kind of calcic, by magnetic separation residue and apatite through height
Temperature melting, apatite are thermally decomposed and generate P4O6Volatilization, and P4O6It is absorbed in absorption tower by the leaching of cold water water and obtains phosphorous
Acid (H3PO3, P4O6+6H2O=4H3PO3), phosphorous acid is gradually converted into phosphoric acid (H after air oxidation3PO4)。
Compared with existing red mud comprehensive utilization process, technique of the present invention is had the advantage that
(1) present invention mainly using red mud waste and cheap apatite as raw material, and obtain high added value magnetic iron ore,
The products such as phosphoric acid and cement raw material, resource utilization is high, is truly realized red mud comprehensive utilization.
(2) entire red mud treatment process of the invention does not generate waste residue and exhaust gas, will not generate secondary pollution to environment,
Meet environmental requirement.
(3) substep treatment by stages red mud of the present invention, first will be exhausted big in red mud by hydrothermal reduction and magnetic separation process
Part ferro element is extracted and is separated, and not only resource utilization is high, magnetic separation residue when can also reduce subsequent high temperature frit reaction
Amount, help to reduce cost.
(4) raw material of the invention is easy to get, simple process, equipment requirement are low, safety and environmental protection, strong operability, can be by red mud
Turn waste into wealth, there is preferable economic and social benefit.
Detailed description of the invention
Fig. 1 is present invention process flow diagram.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described reality
Applying example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field
Those of ordinary skill's every other embodiment obtained without creative efforts, belongs to guarantor of the present invention
The range of shield.
Embodiment 1
(1) it pre-processes: being according to mass ratio by Bayer process red mud, waste iron filing and polyethylene glycol that water, water content are 10%
The ratio of 30:33:5:2 mixes, and is uniformly mixing to obtain red mud slurry.
(2) reduction treatment: above-mentioned red mud slurry is placed in hydrothermal reaction kettle, is heated and is carried out in 230 DEG C of heat preservation 30min
Hydrothermal reduction reaction, during which applies the pressure of 2MPa, obtains reaction mixture.
(3) magnetic separation is handled: being separated by solid-liquid separation above-mentioned reaction mixture to obtain mixed solution and solid slag, solid slag is existed
40 DEG C of dryings are crushed, and then magnetic separation obtains magnetic iron ore and magnetic separation residue under 160kA/m intensity magnetic field, and magnetic iron ore is used as ironmaking
Raw material.The rate of recovery of iron reaches 81% in red mud.
(4) forming processes: magnetic separation residue and apatite being mixed according to the ratio that mass ratio is 8:3, is broken, and
11MPa forming under the pressure then obtains the mixing pelletizing that diameter is 15mm in 55 DEG C of dry 25min.
(5) melt process: by mixing pelletizing, in electric furnace, 1600 DEG C of high-temperature fusion 30min under nitrogen protection are melted
Slag, escaping gas obtains phosphoric acid with water spray in absorption tower in melting process, and liquid slag is used as cement after trimming
Raw material.
Embodiment 2
(1) it pre-processes: according to mass ratio being 45 by combination method red mud, iron powder and polyethylene glycol that water, water content are 5%:
The ratio of 25:10:1 mixes, and is uniformly mixing to obtain red mud slurry.
(2) reduction treatment: above-mentioned red mud slurry is placed in hydrothermal reaction kettle, is heated and is carried out in 200 DEG C of heat preservation 40min
Hydrothermal reduction reaction, during which applies the pressure of 1MPa, obtains reaction mixture.
(3) magnetic separation is handled: being separated by solid-liquid separation above-mentioned reaction mixture to obtain mixed solution and solid slag, solid slag is existed
40 DEG C of dryings are crushed, and then magnetic separation obtains magnetic iron ore and magnetic separation residue under 140kA/m intensity magnetic field, and magnetic iron ore is used as ironmaking
Raw material.The rate of recovery of iron reaches 83% in red mud
(4) forming processes: magnetic separation residue and apatite being mixed according to the ratio that mass ratio is 7:4, is broken, and
14MPa forming under the pressure then obtains the mixing pelletizing that diameter is 13mm in 60 DEG C of dry 15min.
(5) melt process: by mixing pelletizing, in electric furnace, 1650 DEG C of high-temperature fusion 35min under argon gas protection are melted
Slag, escaping gas obtains phosphoric acid with water spray in absorption tower in melting process, and liquid slag is used as cement after trimming
Raw material.
Embodiment 3
(1) it pre-processes: being according to mass ratio by red mud from sintering process, waste iron filing and polyethylene glycol that water, water content are 8%
The ratio of 40:35:7:3 mixes, and is uniformly mixing to obtain red mud slurry.
(2) reduction treatment: above-mentioned red mud slurry is placed in hydrothermal reaction kettle, is heated and is carried out in 140 DEG C of heat preservation 50min
Hydrothermal reduction reaction, during which applies the pressure of 3MPa, obtains reaction mixture.
(3) magnetic separation is handled: being separated by solid-liquid separation above-mentioned reaction mixture to obtain mixed solution and solid slag, solid slag is existed
90 DEG C of dryings are crushed, and then magnetic separation obtains magnetic iron ore and magnetic separation residue under 120kA/m intensity magnetic field, and magnetic iron ore is used as ironmaking
Raw material.The rate of recovery of iron reaches 82% in red mud.
(4) forming processes: magnetic separation residue and apatite being mixed according to the ratio that mass ratio is 7:5, is broken, and
10MPa forming under the pressure then obtains the mixing pelletizing that diameter is 10mm in 50 DEG C of dry 30min.
(5) melt process: by mixing pelletizing, in electric furnace, 1600 DEG C of high-temperature fusion 40min under nitrogen protection are melted
Slag, escaping gas obtains phosphoric acid with water spray in absorption tower in melting process, and liquid slag is used as cement after trimming
Raw material.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；To the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, those skilled in the art should understand that: it is still
It is possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is equally replaced
It changes；And these are modified or replaceed, the essence for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution
Mind and range.
Claims (9)
1. the technique that a kind of red mud step-by-step processing realizes comprehensive utilization, it is characterised in that: the following steps are included:
1) water, red mud, material containing fe and surfactant are mixed, stirring is sized mixing, and red mud slurry is obtained；
2) red mud slurry is transferred in autoclave, is carried out hydrothermal reduction reaction, is obtained mix products；
3) for the mix products by being separated by solid-liquid separation, gained slag phase passes through the isolated magnetic iron ore of magnetic separation and magnetic separation residue；
4) the magnetic separation residue and apatites mixed, are pressed into pelletizing；
5) pelletizing, which is placed in protective atmosphere, carries out high-temperature fusion, and escaping gas is inhaled by water spray during high-temperature fusion
Receipts obtain phosphoric acid, and the liquid slag that high-temperature fusion process generates is as cement raw material.
2. the technique that a kind of red mud step-by-step processing according to claim 1 realizes comprehensive utilization, it is characterised in that: described red
Mud drum includes at least one of Bayer process red mud, red mud from sintering process or combination method red mud；The water content of the red mud be 5~
10%.
3. the technique that a kind of red mud step-by-step processing according to claim 1 realizes comprehensive utilization, it is characterised in that: described to contain
Fe material includes at least one of waste iron filing, iron powder.
4. the technique that a kind of red mud step-by-step processing according to claim 1 realizes comprehensive utilization, it is characterised in that: the table
Face activating agent includes polyethylene glycol.
5. a kind of red mud step-by-step processing according to any one of claims 1 to 4 realizes that the technique of comprehensive utilization, feature exist
In the mass ratio of: water, red mud, material containing fe and surfactant be (30~45): (25~35): (5~10): (1~
3)。
6. the technique that a kind of red mud step-by-step processing according to claim 1 realizes comprehensive utilization, it is characterised in that: the water
The condition of thermal reduction reaction are as follows: increase pressure is 1~3MPa, and temperature is 140~230 DEG C, and the time is 30~50min.
7. the technique that a kind of red mud step-by-step processing according to claim 1 realizes comprehensive utilization, it is characterised in that: the magnetic
Selecting intensity is 120~160kA/m.
8. the technique that a kind of red mud step-by-step processing according to claim 1 realizes comprehensive utilization, it is characterised in that: magnetic separation is residual
The mass ratio of slag and apatite is (7~8): (3~5).
9. the technique that a kind of red mud step-by-step processing according to claim 1 realizes comprehensive utilization, it is characterised in that: the height
The condition of temperature melting are as follows: temperature is 1600~1700 DEG C, and the time is 30~40min.
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| CN110803717A (en) * | 2019-10-17 | 2020-02-18 | 东北大学 | Method for carrying out reduction pre-magnetization on calcium iron garnet hydrate based on aqueous solution |
| CN110937638A (en) * | 2019-10-17 | 2020-03-31 | 东北大学 | Hydrated calcium iron garnet carbon thermal reduction pre-magnetization method |
| CN111744476A (en) * | 2020-07-08 | 2020-10-09 | 昆明理工大学 | Preparation method and application of red mud carbon-based catalyst |
| CN112830699A (en) * | 2021-02-24 | 2021-05-25 | 北京科技大学 | Cement admixture, preparation method and application |
| CN114833166A (en) * | 2022-07-04 | 2022-08-02 | 北京科技大学 | Method and equipment for eliminating high alkalinity of red mud by virtue of supergravity |
| WO2022237705A1 (en) * | 2021-05-10 | 2022-11-17 | 武汉理工大学 | Impurity removal method for silicate solid waste and use thereof |
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| RAN ZHANG ET AL.，: "Recovery of alumina and alkali in Bayer red mud by the formation of andradite-grossular hydrogarnet in hydrothermal process", 《JOURNAL OF HAZARDOUS MATERIALS》 * |
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| CN111744476A (en) * | 2020-07-08 | 2020-10-09 | 昆明理工大学 | Preparation method and application of red mud carbon-based catalyst |
| CN111744476B (en) * | 2020-07-08 | 2022-10-14 | 昆明理工大学 | Preparation method and application of red mud carbon-based catalyst |
| CN112830699A (en) * | 2021-02-24 | 2021-05-25 | 北京科技大学 | Cement admixture, preparation method and application |
| WO2022237705A1 (en) * | 2021-05-10 | 2022-11-17 | 武汉理工大学 | Impurity removal method for silicate solid waste and use thereof |
| CN114833166A (en) * | 2022-07-04 | 2022-08-02 | 北京科技大学 | Method and equipment for eliminating high alkalinity of red mud by virtue of supergravity |
| CN114833166B (en) * | 2022-07-04 | 2022-09-06 | 北京科技大学 | Method and equipment for eliminating high alkalinity of red mud by virtue of supergravity |
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