CN109913655A - A kind of method that red mud recycles sodium, iron and titanium while the direct cement of liquid slag - Google Patents

A kind of method that red mud recycles sodium, iron and titanium while the direct cement of liquid slag Download PDF

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Publication number
CN109913655A
CN109913655A CN201910290644.1A CN201910290644A CN109913655A CN 109913655 A CN109913655 A CN 109913655A CN 201910290644 A CN201910290644 A CN 201910290644A CN 109913655 A CN109913655 A CN 109913655A
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iron
red mud
titanium
liquid slag
raw material
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张廷安
王艳秀
刘燕
豆志河
吕国志
王坤
赵秋月
傅大学
张伟光
张子木
韩继标
郭军华
晁曦
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Northeastern University China
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Northeastern University China
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Priority to PCT/CN2019/090838 priority patent/WO2020206830A1/en
Publication of CN109913655A publication Critical patent/CN109913655A/en
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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
    • C04B7/14—Cements containing slag
    • C04B7/147—Metallurgical slag
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct 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
    • 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
    • C22B26/10—Obtaining alkali metals
    • 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
    • C22B34/00—Obtaining refractory metals
    • C22B34/10—Obtaining titanium, zirconium or hafnium
    • C22B34/12—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08
    • 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
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • 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
    • 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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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Manufacturing & Machinery (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Structural Engineering (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

A kind of method that red mud recycles sodium, iron and titanium while the direct cement of liquid slag, sequentially includes the following steps: (1) and prepares the high titanium red mud of raw material high-speed rail；(2) dry to obtain dehydrated raw material；Mixture is made in dehydrated raw material and solid carbonaceous reducer and slag former mixing, and the swirl center of vortex stirring high temperature furnace is arrived in blowing, carries out vortex stirring reduction；(3) molten iron formed after restoring is layered continuous overflow with titaniferous liquid slag and separates；Ferrochrome is added into molten iron and wear resistant cast iron product is made in manganese iron；(4) in cooling procedure, titaniferous forms titaniferous phase at separating/enriching to titaniferous liquid slag, separates with recrement；Recrement adjusts component, then clinker is made through broken and grinding.The extraction of sodium and iron in red mud can be achieved at the same time in method of the invention, and processing step is simple, and the recovery rate of sodium and iron is higher, and red mud utilization rate is up to 100%.

Description

A kind of method that red mud recycles sodium, iron and titanium while the direct cement of liquid slag
Technical field
The present invention relates to environmental protection technical fields, and in particular to liquid slag is straight simultaneously for a kind of red mud recycling sodium, iron and titanium The method of water receiving argillization.
Technical background
Red mud be using bauxite as waste aluminium oxide or aluminium hydroxide after generated strong basicity solid waste.Mesh Before, global red mud reserves estimation alreadys exceed 3,000,000,000 tons, and is about increased every year with 1.2 hundred million tons of speed, and world's red mud is flat Equal utilization rate is 15%.Chinese red mud adds up volume of cargo in storage and has risen to 600,000,000 tons, and is about increased every year with 100,000,000 tons of speed, Chinese red mud utilization rate is only 4%.The method disposition that most of red mud still takes land to store up.Red mud pilling not only wastes Secondary resource occupies a large amount of soils, and destroys the surrounding enviroment of red mud dump, brings serious environmental problem, causes The environmental protection pressure of aluminum i ndustry increases severely.The environmental risk of red mud pilling causes the weight of government, each alumina producing state and enterprise already Depending on solving the problems, such as that the key of red mud is research and development red mud comprehensive utilization technique.
To realize that efficient utilization and the valuable element of red mud extract, China's aluminum i ndustry has carried out a large amount of R&D work, Existing red mud generally can be divided into two kinds using technology: one is as general raw material of industry whole utilization, Ru Zhaoguang is bright etc. Human hair bright " a method of utilize red mud produce clinker " (application number: CN201210031710.1), is red to dealkalize Dealkalize gypsum and flyash are added in mud, three of the above material are uniformly mixed in agitator tank, while adding water by its concentration tune It is whole to 30%.It is lower than 25% using plate and frame high-pressure pressure filter filters pressing to solid mixture water content, is then fed into rotary kiln and forges Calcination of cement clinker；A kind of " technique that aluminum i ndustry technique waste residue is all transformed into ecological architectural material of Wang Wenju et al. invention With method " (application number: CN200710105971), using aluminum i ndustry in process of production institute's output solid waste red mud (burn Connection, Bayer process), boiler slag, milltailings, ashing slag, gas generator slag, six kinds of waste residues itself of sludge substance category Property, by drying, crushing, rational proportion, machine-shaping (roll, squeeze) consolidation or sintering process, it is converted into novel road and uses Material and construction material.
Also there is the technology extracted from red mud and have the valuable metals element such as Na, Al, Fe, rare metal；The invention such as Lou Dongmin " a kind of dealkalization method of Bayer process red mud " (application number: CN201810572642.7) first red mud is ground, make red mud Surface Renewal, then again to de-alkali reaction is carried out after the red mud that Surface Renewal is handled is mixed with milk of lime, by dealkalize Red mud slurry after reaction washed, solid-liquor separation, can obtain the solution containing alkali, returning alumina production procedure, separation The red mud of Lower alrali content send red mud dam to store up afterwards；
The inventions such as Chen Huanyue " a method of sorting mentions iron except sodium from red mud, and application number CN108686828A " will be red The fine red mud material based on subparticle is made by crushing or ball milling in mud, is classified to fine red mud material, will be fine red 10~98% separating in subparticle of the partial size less than 5 microns in pug, the partial size separated is micro- less than 5 microns Fine grained product is the product based on Sodium-silica slag and calcium-silicon slag, and wherein sodium oxide content is remaining red after classification greater than 10% Pug is iron ore product, and wherein iron oxide content is greater than 30%.
There are red mud alkalinity to restrict when red mud is as general raw material of industry whole utilization, product price is low, income is poor etc. Problem；The method for extracting valuable element respectively has that recovery rate is low, product purity is low directly to utilize for enrichment of element mostly again The problems such as.Although the research that therefore aluminum oxide industry is utilized about red mud is numerous, the stockpiling problem of red mud is still failed at present To properly settling.
Summary of the invention
In order to preferably realize the comprehensive utilization of red mud, the present invention provides a kind of red mud recycling sodium, iron and titanium while melting The method of the direct cement of slag, using the high titanium red mud of high-speed rail as raw material, and reducing agent and slag former mixing, then it is blown reduction high temperature The reduction of furnace swirl center mentions iron, and sodium enters off-gas recovery, and liquid slag makes titaniferous phase concentration and separation through slow cooling, and recrement adjustment component is ground Mill is directly becoming clinker.
Method of the invention sequentially includes the following steps:
(1) prepare the high titanium red mud of raw material high-speed rail, the high titanium red mud of high-speed rail 20~40% TFe by mass percentage contain TiO2 3 ~10%, Na2O 2~15%, Al2O315~25%, SiO215~25%, CaO 5~25%, H2O 5~20%；
(2) by mass percent≤1% of raw material drying to water, dehydrated raw material is obtained；By dehydrated raw material with it is solid carbonaceous Mixture is made in reducing agent and slag former mixing, and the directly swirl center of blowing to vortex stirring high temperature furnace, mixture is involved in In molten bath, 10~60min is restored in 1300~1450 DEG C of progress vortex stirrings；The solid carbonaceous reducer is coking coal, Gu The molar ratio of Fe is 1.2~1.5 in the amount and raw material of state carbonaceous reducing agent, and slag former is CaO and CaF2Mixture, wherein CaO is 1.0~1.4 additions, CaF by the basicity of mixture2Account for the 10~30% of CaO gross mass:
(3) molten iron and titaniferous liquid slag formed after restoring is layered, and carries out continuous overflow separation；To the molten iron isolated Middle addition ferrochrome and manganese iron, which are directly smelted and cast, is made wear resistant cast iron product；
(4) in cooling procedure, titaniferous ingredient is progressively enriched with to form titaniferous phase the titaniferous liquid slag isolated, with recrement point From；Titaniferous is mutually taken out, recrement adjustment component complies with clinker requirement, then clinker is made through broken and grinding.
The calculation formula of above-mentioned basicity is pressed
In formula, mCaO is the mass percent of calcium oxide in mixed powder, mAl2O3For the quality of aluminium oxide in mixed powder Percentage, mSiO2For the mass percent of silica in mixed powder, mTiO2For the quality percentage of titanium oxide in mixed powder Number.
In the above method, the key reaction of iron oxide reduction are as follows:
FexOy+ yC=yCO+xFe (2),
FexOy+ yCO=yCO2+xFe (3)
With
FexOy+ y/2C=y/2CO2+xFe (4)。
In the above method, sodium enters flue gas in vortex stirring reduction process, recycles through flue gas dust collection system.
In the above method, the rate of recovery >=90% of iron.
In the above method, the rate of recovery >=95% of sodium.
In the above method, rich titanium phase main component is titanium oxide, the rate of recovery >=60% of titanium.
Compared with prior art, the features of the present invention and beneficial effect are:
(1) the high titanium red mud of high-speed rail after red mud is mixed with reducing agent and slag former, asks straight without making using vortex melting and reducing Blowing is connect to vortex fusion reducing furnace eddy region, sodium enters off-gas recovery in reduction process, obtains molten iron and ferrochrome, manganese iron is added It directly smelts into wear resistant cast iron product, the extraction of sodium and iron in red mud can be achieved at the same time；
(2) processing step is simple, the liquid slag Na after dealkalize2O content less than 0.5%, can more meet clinker at Divide and require, can increase red mud calcining cement clinker adds dosage；
(3) recovery rate of sodium and iron is higher, and respectively in 90% or more and 95% or more, liquid slag keeps titaniferous mutually rich through cooling Collection separation, for the recovery rate of titanium up to 60% or more, the tailings after extraction is entirely used for production clinker, and red mud utilization rate reaches 100%.
Detailed description of the invention
Fig. 1 is the method flow signal that a kind of red mud of the invention recycles sodium, iron and titanium while the direct cement of liquid slag Figure.
Specific embodiment
The ingredient of clinker contains CaO 62~64%, SiO by mass percentage in the embodiment of the present invention220~23%, Al2O34~6%, Fe2O33~5%.
The Na of liquid slag in the embodiment of the present invention2O mass percent is less than 0.5%.
Wear resistant cast iron product in the embodiment of the present invention is the wear-resisting casting of trade mark HBW555Cr13 (ISO 21988/JN/HB) Iron.
Temperature in the embodiment of the present invention when raw material drying is 150~200 DEG C.
Vortex stirring reduction of the invention refers to a kind of method disclosed in invention " vortex stirring method for melting reduction iron making ", Related vortex stirring reduction high temperature furnace is the equipment that this method is.
A kind of vortex stirring method for melting reduction iron making of the invention is the patent application of publication number CN106435080A.
It is that calcareous raw material, siliceous raw material and/or ferriferous raw material is added that component is adjusted in the embodiment of the present invention.Calcareous raw material choosing With at least one of lime stone, carbide slag；Siliceous raw material selects kaolin, clay, flyash, at least one in mine tailings Kind；Ferriferous raw material selects at least one of iron red mud, scum, steel slag.
The rate of recovery >=95% of sodium in the embodiment of the present invention, the rate of recovery >=90% of iron.
Rich titanium phase main component is titanium oxide, the rate of recovery >=60% of titanium in the embodiment of the present invention.
The present invention will be further described in detail below with reference to the embodiments.
Embodiment 1
(1) prepare the high titanium red mud of raw material high-speed rail, the high titanium red mud of high-speed rail TFe 40% by mass percentage contains TiO210%, Na2O 12%；
(2) by mass percent≤1% of raw material drying to water, dehydrated raw material is obtained；By dehydrated raw material with it is solid carbonaceous Mixture is made in reducing agent and slag former mixing, and the directly swirl center of blowing to vortex stirring high temperature furnace, mixture is involved in In molten bath, 60min is restored in 1300 DEG C of progress vortex stirrings；The solid carbonaceous reducer is coking coal, solid carbonaceous reduction The molar ratio of Fe is 1.2 in the amount and raw material of agent, and slag former is CaO and CaF2Mixture, wherein CaO press mixture basicity For 1.4 additions, CaF2Account for the 10% of CaO gross mass: sodium enters flue gas in vortex stirring reduction process, returns through flue gas dust collection system It receives；
(3) molten iron and titaniferous liquid slag formed after restoring is layered, and carries out continuous overflow separation；To the molten iron isolated Middle addition ferrochrome and manganese iron, which are directly smelted and cast, is made wear resistant cast iron product；
(4) in cooling procedure, titaniferous ingredient is progressively enriched with to form titaniferous phase the titaniferous liquid slag isolated, with recrement point From；Titaniferous mutually to be taken out, recrement adjustment component complies with clinker requirement, then clinker is made through broken and grinding, CaO, SiO in clinker2、Al2O3And Fe2O3Mass percent be respectively 62%, 23%, 5% and 4%, it is ripe to meet cement The component requirements of material.
Embodiment 2
(1) prepare the high titanium red mud of raw material high-speed rail, the high titanium red mud of high-speed rail TFe 20% by mass percentage, TiO24%, Na2O 3%；
(2) by mass percent≤1% of raw material drying to water, dehydrated raw material is obtained；By dehydrated raw material with it is solid carbonaceous Mixture is made in reducing agent and slag former mixing, and the directly swirl center of blowing to vortex stirring high temperature furnace, mixture is involved in In molten bath, 10min is restored in 1450 DEG C of progress vortex stirrings；The solid carbonaceous reducer is coking coal, solid carbonaceous reduction The molar ratio of Fe is 1.5 in the amount and raw material of agent, and slag former is CaO and CaF2Mixture, wherein CaO press mixture basicity For 1.2 additions, CaF2Account for the 20% of CaO gross mass: sodium enters flue gas in vortex stirring reduction process, returns through flue gas dust collection system It receives；
(3) molten iron and titaniferous liquid slag formed after restoring is layered, and carries out continuous overflow separation；To the molten iron isolated Middle addition ferrochrome and manganese iron, which are directly smelted and cast, is made wear resistant cast iron product；
(4) in cooling procedure, titaniferous ingredient is progressively enriched with to form titaniferous phase the titaniferous liquid slag isolated, with recrement point From；Titaniferous mutually to be taken out, recrement adjustment component complies with clinker requirement, then clinker is made through broken and grinding, CaO, SiO in clinker2、Al2O3And Fe2O3Mass percent be respectively 64%, 20%, 6%, 5%, meet clinker Component requirements.
Embodiment 3
(1) prepare the high titanium red mud of raw material high-speed rail, the high titanium red mud of high-speed rail TFe 30% by mass percentage, TiO2Content exists 3%, Na2O 15%；
(2) by mass percent≤1% of raw material drying to water, dehydrated raw material is obtained；By dehydrated raw material with it is solid carbonaceous Mixture is made in reducing agent and slag former mixing, and the directly swirl center of blowing to vortex stirring high temperature furnace, mixture is involved in In molten bath, 30min is restored in 1400 DEG C of progress vortex stirrings；The solid carbonaceous reducer is coking coal, solid carbonaceous reduction The molar ratio of Fe is 1.4 in the amount and raw material of agent, and slag former is CaO and CaF2Mixture, wherein CaO press mixture basicity For 1.0 additions, CaF2Account for the 30% of CaO gross mass: sodium enters flue gas in vortex stirring reduction process, returns through flue gas dust collection system It receives；
(3) molten iron and titaniferous liquid slag formed after restoring is layered, and carries out continuous overflow separation；To the molten iron isolated Middle addition ferrochrome and manganese iron, which are directly smelted and cast, is made wear resistant cast iron product；
(4) in cooling procedure, titaniferous ingredient is progressively enriched with to form titaniferous phase the titaniferous liquid slag isolated, with recrement point From；Titaniferous mutually to be taken out, recrement adjustment component complies with clinker requirement, then clinker is made through broken and grinding, CaO, SiO in clinker2、Al2O3And Fe2O3Mass percent be respectively 63%, 21%, 4% and 3%, it is ripe to meet cement The component requirements of material.

Claims (6)

1. the method for a kind of red mud recycling sodium, iron and the titanium direct cement of liquid slag simultaneously, it is characterised in that according to the following steps into Row:
(1) prepare the high titanium red mud of raw material high-speed rail, the high titanium red mud of high-speed rail 20~40% TFe by mass percentage contain TiO23~ 10%, Na2O 2~15%, Al2O315~25%, SiO215~25%, CaO 5~25%, H2O 5~20%；
(2) by mass percent≤1% of raw material drying to water, dehydrated raw material is obtained；By dehydrated raw material and solid carbonaceous reduction Mixture is made in agent and slag former mixing, and the directly swirl center of blowing to vortex stirring high temperature furnace, mixture is involved in molten bath In, 10~60min is restored in 1300~1450 DEG C of progress vortex stirrings；The solid carbonaceous reducer is coking coal, solid carbon The molar ratio of Fe is 1.2~1.5 in the amount and raw material of matter reducing agent, and slag former is CaO and CaF2Mixture, wherein CaO is pressed The basicity of mixture is 1.0~1.4 additions, CaF2Account for the 10~30% of CaO gross mass:
(3) molten iron and titaniferous liquid slag formed after restoring is layered, and carries out continuous overflow separation；Add into the molten iron isolated Enter ferrochrome and manganese iron is directly smelted and cast and wear resistant cast iron product is made；
(4) in cooling procedure, titaniferous ingredient is progressively enriched with to form titaniferous phase the titaniferous liquid slag isolated, and separates with recrement； Titaniferous is mutually taken out, recrement adjustment component complies with clinker requirement, then clinker is made through broken and grinding.
2. the method for a kind of red mud recycling sodium according to claim 1, iron and titanium while the direct cement of liquid slag, special Sign be the calculation formula of the basicity by
In formula, mCaO is the mass percent of calcium oxide in mixed powder, mAl2O3For the quality percentage of aluminium oxide in mixed powder Number, mSiO2For the mass percent of silica in mixed powder, mTiO2For the mass percent of titanium oxide in mixed powder.
3. the method for a kind of red mud recycling sodium according to claim 1, iron and titanium while the direct cement of liquid slag, special Sign is in step (2) that sodium enters flue gas in vortex stirring reduction process, recycles through flue gas dust collection system.
4. the method for a kind of red mud recycling sodium according to claim 1, iron and titanium while the direct cement of liquid slag, special Sign is the rate of recovery >=90% of iron.
5. the method for a kind of red mud recycling sodium according to claim 1, iron and titanium while the direct cement of liquid slag, special Sign is the rate of recovery >=95% of sodium.
6. the method for a kind of red mud recycling sodium according to claim 1, iron and titanium while the direct cement of liquid slag, special Sign is that rich titanium phase main component is titanium oxide, the rate of recovery >=60% of titanium.
CN201910290644.1A 2019-04-11 2019-04-11 A kind of method that red mud recycles sodium, iron and titanium while the direct cement of liquid slag Pending CN109913655A (en)

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PCT/CN2019/090838 WO2020206830A1 (en) 2019-04-11 2019-06-12 Method for recovering sodium, iron and titanium from red mud and directly cementing molten slag

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CN110818389A (en) * 2019-12-10 2020-02-21 兰州理工大学 Method for recovering sodium by preparing hollow ceramic microspheres from red mud
CN113174456A (en) * 2021-04-28 2021-07-27 东北大学 Comprehensive utilization method for smelting reduction of high-iron red mud by bottom-top combined blowing
CN113174457A (en) * 2021-04-28 2021-07-27 东北大学 Side-top composite blowing smelting reduction furnace for treating high-iron red mud
CN113174455A (en) * 2021-04-28 2021-07-27 东北大学 Comprehensive utilization method for smelting reduction of high-iron red mud by side-top combined blowing
CN115521083A (en) * 2022-10-12 2022-12-27 四川安达尔环保工程有限公司 Method for applying red mud to cement production with zero carbon emission

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CN102174664A (en) * 2010-11-24 2011-09-07 胡长春 Comprehensive utilization method of red mud coal-base rotary kiln method
CN102816880A (en) * 2012-08-17 2012-12-12 东北大学 Ironmaking and aluminum extraction comprehensive utilization method of high-iron red mud
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CN110818389A (en) * 2019-12-10 2020-02-21 兰州理工大学 Method for recovering sodium by preparing hollow ceramic microspheres from red mud
CN113174456A (en) * 2021-04-28 2021-07-27 东北大学 Comprehensive utilization method for smelting reduction of high-iron red mud by bottom-top combined blowing
CN113174457A (en) * 2021-04-28 2021-07-27 东北大学 Side-top composite blowing smelting reduction furnace for treating high-iron red mud
CN113174455A (en) * 2021-04-28 2021-07-27 东北大学 Comprehensive utilization method for smelting reduction of high-iron red mud by side-top combined blowing
CN115521083A (en) * 2022-10-12 2022-12-27 四川安达尔环保工程有限公司 Method for applying red mud to cement production with zero carbon emission

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