CN112707424A - Method for producing alumina by using slag metallurgy technology - Google Patents

Method for producing alumina by using slag metallurgy technology Download PDF

Info

Publication number
CN112707424A
CN112707424A CN202110082072.5A CN202110082072A CN112707424A CN 112707424 A CN112707424 A CN 112707424A CN 202110082072 A CN202110082072 A CN 202110082072A CN 112707424 A CN112707424 A CN 112707424A
Authority
CN
China
Prior art keywords
slag
molten
iron
vanadium
cao
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110082072.5A
Other languages
Chinese (zh)
Inventor
张力
张永玲
邹鑫
张伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Northeastern University China
Original Assignee
Northeastern University China
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Northeastern University China filed Critical Northeastern University China
Priority to CN202110082072.5A priority Critical patent/CN112707424A/en
Priority to PCT/CN2021/086846 priority patent/WO2022156076A1/en
Publication of CN112707424A publication Critical patent/CN112707424A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F7/00—Compounds of aluminium
    • C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
    • C01F7/16—Preparation of alkaline-earth metal aluminates or magnesium aluminates; Aluminium oxide or hydroxide therefrom
    • C01F7/164—Calcium aluminates
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/006—Starting from ores containing non ferrous metallic oxides
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/008—Use of special additives or fluxing agents
    • 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
    • C22B21/00—Obtaining aluminium
    • C22B21/0007—Preliminary treatment of ores or scrap or any other metal source
    • 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
    • C22B7/006—Wet 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
    • 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
    • C22B7/04—Working-up slag
    • 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
    • Y02P10/10—Reduction of greenhouse gas [GHG] emissions
    • Y02P10/143—Reduction of greenhouse gas [GHG] emissions of methane [CH4]

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

A method for producing alumina by using a slag metallurgy technology belongs to the fields of comprehensive utilization of aluminum-containing mineral resources, slag metallurgy and alumina production. The method comprises the steps of adding high calcium oxide metallurgical slag, aluminum ore and a reducing agent into a melting reactor for mixing, and keeping the molten state, wherein the mixed slag meets the following requirements: in mol ratio, CaO: al (Al)2O3>1.6; according to the mass ratio, CaO: SiO 223.0-5.0 percent; blowing oxidizing gas to perform slag bath melting reduction; after reduction, slag and iron are separated, and after the obtained lower layer molten iron is used for steelmaking, the molten steel slag returns to the melting reactor; cooling the upper calcium aluminate slag, adding Na2CO3Solution, introduction of CO2To obtain Al (OH)3Calcining to obtain the alumina. The method has the characteristics of strong raw material adaptability, low energy consumption, low flux CaO consumption, multi-component recovery, no solid waste discharge, short flow, low cost, environmental friendliness and the like, and realizes the recovery and production of the aluminum component in the high-calcium-oxide metallurgical slag and the aluminum ore.

Description

Method for producing alumina by using slag metallurgy technology
Technical Field
The invention belongs to the technical field of comprehensive utilization of aluminum-containing mineral resources, slag metallurgy and alumina production, and particularly relates to a method for producing alumina by using a slag metallurgy technology.
Background
China is the country with the highest alumina production and the country with the highest bauxite import. The industrial production of alumina mainly adopts the Bayer process, the Bayer-sintering process and other processes, and the prior art has the following defects:
(1) the raw material adaptability is poor. The raw material is high-grade bauxite (the ratio of aluminum to silicon is more than 7), and aluminum ore resources such as low-grade bauxite, high-iron bauxite, fly ash, coal gangue, nepheline, alum, clay, kaolin and the like cannot be utilized;
(2) a large amount of red mud is produced and cannot be utilized. Each ton of alumina produced produces 0.7-1.8 tons of red mud, and about 1.2 million tons are produced every year worldwide. Red mud contains harmful components such as sodium, radioactive elements and the like, is difficult to utilize and is piled up by hundreds of millions of tons;
(3) the recovery of valuable components such as iron, chromium, vanadium, manganese, phosphorus and the like in the bauxite resource can not be realized;
(4) has the defects of complex production process, large equipment investment, large occupied area, large investment, high cost, large pollution and the like.
Aiming at the existing problems, a great deal of research is carried out on the new technology for producing the aluminum oxide in China, and the research contents are as follows:
(1) the acid method treatment technology has high acid consumption, serious corrosion, complex equipment, great environmental pollution and the like;
(2) the acid method-alkali method technology has high acid consumption, high cost, long flow, great environmental pollution and the like;
(3) the reverse flotation desilication technology has large floor area and large pollution, and can not eliminate red mud and recover components such as iron, vanadium and the like;
(4) the magnetic separation technology has large floor area and low yield of iron components, and can not eliminate red mud and recover valuable components of chromium and vanadium, and the like;
(5) the suspension magnetic roasting technology (CN2017105886247.7, CN201710588620.5) has high yield of iron components, is only suitable for high-iron bauxite, has high cost and long flow path, and cannot eliminate red mud and recover valuable components of chromium and vanadium;
(6) the prereduction-magnetic separation technology (CN201911159643.X) is suitable for high-iron bauxite, has poor magnetic separation effect, large technical difficulty, high energy consumption, short furnace kiln service life, large equipment investment, long flow, high cost and long flow, and can not eliminate red mud;
(7) the direct reduction-melting separation technology (CN201510531320.4, CN201510530645.0, CN201810593292.2, CN201910888430.4 and CN201910909622.9) has the defects of high reduction temperature, high energy consumption, large CaO flux consumption, high cost, complex equipment, difficulty in continuous operation and the like, and is only suitable for high-iron bauxite;
(8) the blast furnace ironmaking technology (CN201410048304.5) has the defects of high recovery rate, high energy consumption, long flow, large investment, large CaO flux consumption, high cost, large environmental pollution and the like, is only suitable for high-iron bauxite, and is limited by the nation.
The above research cannot solve the problems existing in the existing process, and a new technology meeting the following requirements must be developed:
(1) the raw material adaptability is strong, the bauxite with high aluminum-silicon ratio can be treated, and the bauxite resources such as the bauxite with low aluminum-silicon ratio, the high-iron bauxite, the multi-metal intergrown ore, the high-aluminum fly ash, the high-aluminum coal gangue and the nepheline can also be treated;
(2) no solid waste (red mud and the like) is discharged, tailings or red mud can be directly utilized, high value-added products are prepared, the environment is protected, the whole process can be circulated, and the method has the characteristics of environmental friendliness, cleanness and high efficiency;
(3) can simultaneously recover iron, chromium, vanadium, phosphorus, niobium, CaO and SiO2The valuable components are equal, and the income is high;
(4) the process technology is simple, the flux consumption is low, the energy consumption is low, the investment is low, the flow is short, the cost is low, and the environment is friendly;
(5) the whole process realizes the unification of economy, technology and environment.
Chinese patents (CN201611133558.2, CN201611133559.7, CN201610566347.7, CN201610570916.X) propose iron-making technology by smelting reduction of mixed iron-containing slagMaterials are obtained to obtain molten iron and silicate slag (silicate slag, medium-low alkalinity slag (CaO/SiO)2<2.5) mainly comprising mineral phases such as calcium silicate, melilite and the like) is a new iron-making method, molten iron is a main product, molten slag is a byproduct, and the molten slag is used as a cement raw material after water quenching, so that the problem of low added value exists.
The ferromanganese smelting and the magnesium smelting slag are respectively produced in a ferromanganese smelting iron alloy process and a metal magnesium smelting process. The ferromanganese smelting slag, the magnesium smelting slag, the molten steel slag and the blast furnace slag belong to a high calcium oxide slag system and contain a large amount of molten CaO and Al2O3And SiO2The total amount of the valuable components discharged per year in China reaches more than 6 hundred million tons, the valuable components cannot be treated or the added value is low, and a large amount of valuable components are accumulated to waste physical heat and resources.
Disclosure of Invention
Aiming at the problem of producing alumina in the prior art, the invention provides a method for producing alumina by using a slag metallurgy technology, which comprises the following steps: adding aluminum ore, alkaline flux, reducing agent or aluminum ore and reducing agent into high calcium oxide metallurgical slag, melting and reducing the slag bath, separating slag from gold, wherein the main product is calcium aluminate slag, and the byproduct is molten iron or vanadium-containing molten iron or vanadium-chromium-containing molten iron. After the calcium aluminate slag is cooled and self-pulverized, the alumina is obtained by a leaching-calcining process, and the leached slag is used as a raw material for cement production.
The invention utilizes the high physical heat and chemical activity of high calcium oxide metallurgical slag (molten steel slag, blast furnace slag, ferromanganese smelting slag and magnesium smelting slag) to melt and reduce aluminum ores in a slag bath to obtain calcium aluminate slag (aluminate slag and ultrahigh alkalinity slag (CaO/SiO)2Not less than 3) mainly containing heptaluminate dodecacalcium, calcium aluminate and other mineral phases) and vanadium-containing molten iron, and producing alumina from the pulverized calcium aluminate slag by a hydrometallurgical process, wherein the calcium aluminate slag and the alumina are main products, and a byproduct is the molten iron. The method has the characteristics of strong raw material adaptability, low energy consumption, low flux CaO consumption, multi-component recovery, no solid waste discharge, short flow, low cost, environmental friendliness and the like, and is a novel alumina production method for realizing the recovery and production of the aluminum component in the high-calcium-oxide metallurgical slag and the aluminum ore.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the invention relates to a method for producing alumina by using a slag metallurgy technology, which comprises the following steps;
step 1:
adding the high calcium oxide metallurgical slag into a melting reactor to form reaction slag; the mass percentage of CaO in the high-calcium-oxide metallurgical slag is more than or equal to 30 percent, the high-calcium-oxide metallurgical slag is directly obtained from a metallurgical furnace, and the temperature of the slag is more than or equal to 1100 ℃;
adding aluminum ore and a reducing agent into reaction slag, and keeping the molten state to obtain molten slag; wherein the mass percentage content of alumina in the aluminum ore is more than or equal to 10 percent;
the chemical composition of the molten slag is regulated and controlled by regulating the adding amount of each raw material, so that the molten slag simultaneously meets the following two conditions:
(a) in molten slag, the molar ratio of CaO: al (Al)2O3>1.6；
(b) In molten slag, the mass ratio of CaO: SiO 22＝3.0～5.0；
Blowing oxidizing gas or mixed gas of the oxidizing gas and nitrogen into molten slag to perform slag bath smelting reduction;
step 2:
after the slag bath is melted and reduced, separating slag and iron to obtain lower molten iron and upper calcium aluminate slag;
and step 3:
the lower layer molten iron is directly used as a steelmaking raw material, and after steelmaking, the obtained molten steel slag directly returns to the step 1 and enters a melting reactor;
and 4, step 4:
cooling the upper calcium aluminate slag to obtain self-powdered calcium aluminate slag; adding Na into self-powdering calcium aluminate slag2CO3Leaching the solution to obtain a sodium aluminate solution and leaching residues;
introducing CO into the sodium aluminate solution2To obtain Al (OH)3，Al(OH)3Calcining to obtainTo alumina.
In the step 1, when the addition amount of each raw material is adjusted in the reaction slag, the molten slag cannot satisfy the following two conditions at the same time: (a) in molten slag, the molar ratio of CaO: al (Al)2O3>1.6; (b) in molten slag, the mass ratio of CaO: SiO 22And (3.0-5.0), and an alkaline flux can be added for regulation.
Preferably, the alkaline flux is one or both of limestone and lime.
In the step 1, preferably, the high calcium oxide metallurgical slag is one or more of molten steel slag, blast furnace slag, ferromanganese smelting slag and magnesium smelting slag.
In the step 1, the smelting reactor is preferably one of an electric furnace, a submerged arc furnace, an electric arc furnace, a short blast furnace, an induction furnace, a smelting reduction furnace, a heat-preservation slag ladle and a heat-preservation pit, and the smelting reduction temperature is 1400-1650 ℃.
In the step 1, preferably, the aluminum ore is one or more of bauxite, high-iron bauxite (the mass percentage of total Fe is more than 20%), pre-reduced iron-containing bauxite pellets, fly ash, coal gasification furnace slag, coal gangue, nepheline, alum, clay, kaolinite, bauxite, feldspar, shale and red mud.
When the aluminum ore contains crystal water, the aluminum ore needs to be dried and dehydrated in advance, and the drying temperature is less than 600 ℃.
The aluminum ore is powdery or spherical and is directly added or blown into the reaction slag, and the gas for blowing the aluminum ore is preferably nitrogen and/or oxidizing gas; the oxidizing gas is air, oxygen-enriched air, oxygen and CO2One or more of them.
In the step 1, preferably, the reducing agent is one or more of anthracite, bituminous coal, lignite, pulverized coal, natural gas, coal bed gas and coal gas, a solid reducing agent in the reducing agent is directly added or injected, and the gas injected with the solid reducing agent is preferably nitrogen and/or oxidizing gas; the oxidizing gas is airOxygen-enriched air, oxygen and CO2One or more of them.
In the step 1, preferably, the oxidizing gas is air, oxygen-enriched air, oxygen, or CO2One or more of them.
In the step 1, the slag bath melting reduction process comprises the following steps: the reduction rate of the iron oxide reduced into metallic iron is more than or equal to 90 percent.
In the step 2, further, chromium, vanadium and niobium in the raw materials enter molten iron; the phosphorus component enters calcium aluminate slag and the soot, and the soot is flue gas generated by melting reduction of the slag.
In the step 2, the molten iron is one of common molten iron, vanadium-containing molten iron, niobium-containing molten iron and vanadium-containing ferrochrome molten iron.
In the step 3, when the lower layer molten iron is vanadium-containing molten iron, niobium-containing molten iron and vanadium-containing ferrochrome molten iron, semisteel and slag are obtained after vanadium-chromium-niobium extraction and steelmaking, wherein the slag is one of vanadium slag, niobium slag and vanadium-chromium slag, and the obtained molten steel slag directly returns to the step 1 to enter the melting reactor after the semisteel is subjected to steelmaking.
In the step 4, further, the leaching residue is used as a raw material for cement production.
In the step 4, preferably, the upper calcium aluminate slag is cooled by natural air cooling or furnace cooling.
In the step 4, Na2CO3The solution is preferably 70-110 g/L in mass concentration, the leaching temperature is 70-110 ℃, and Na is added according to the liquid-solid ratio2CO3Solution: self-pulverized calcium aluminate slag ═ (3-11) mL: 1g, and the leaching time is 90-120 min.
The basic principle of the method for producing the alumina by using the slag metallurgy technology is as follows:
(1) the slag bath smelting reduction technology utilizes the physical heat of high calcium oxide metallurgical slag, mature slag system (low melting temperature, low viscosity and the like) and high chemical activity (high content of molten state CaO and the like), has high reaction speed, and eliminates iron, chromium, vanadium and SiO2Group of equalRealizes the CaO and Al in the high calcium oxide metallurgical slag and the aluminum ore according to the influence on the phase and the leaching process of the aluminum2O3、SiO2The components of iron, chromium, vanadium, niobium and the like are efficiently recovered;
(2) the slag bath smelting reduction technology has the characteristics of reducing production energy consumption, reducing flux CaO consumption, eliminating red mud, meeting the raw material requirements of different aluminum ores, having low production cost, being environment-friendly and the like, and has vitality and popularization value;
(3) by means of carbon dioxide or carbon dioxide mixtures, through CO2The + C-2 CO reaction reduces the consumption of reducing agent, realizes carbon emission reduction and carbon dioxide cyclic utilization, and reduces NOxThe sulfur-containing composite material is easy to collect dust, environment-friendly, clean and low in cost;
(4) ultrahigh alkalinity reduction technology (R & ltCaO & gt/SiO & lt/EN & gt)2Not less than 3) and SiO is eliminated under the reducing condition2Influence of components on the slagging and leaching process of the aluminum-containing phase;
(5) the calcium aluminate slagging technology realizes the separation of an aluminum-containing phase and a gangue phase and the recovery of aluminum components;
(6) SiO contained in bauxite during alumina leaching2Will react with NaOH to consume NaOH, and the invention uses the characteristic of high content of CaO in the high calcium oxide metallurgical slag and adopts the ultra-high alkalinity reduction technology (R is CaO/SiO)2Not less than 3) to make SiO in the aluminum ore2Formation of dicalcium silicate to avoid Na+The reaction occurs, and the high-added-value utilization of the high-calcium-oxide metallurgical slag is realized by the dicalcium silicate slagging technology.
Compared with the prior art, the method for producing the aluminum oxide by using the slag metallurgy technology has the beneficial effects that:
(1) the raw material adaptability is strong, the bauxite with high, medium and low aluminum-silicon ratio can be treated, and aluminum ore resources such as high-iron bauxite, fly ash, coal gangue, nepheline, clay, kaolin, red mud and the like can also be treated;
(2) utilizes the physical heat and the high chemical activity of the high calcium oxide metallurgical slag to form (molten slag + aluminum ore) → slag bath smelting reductionA closed cycle process of smelting → (vanadium-containing molten iron + calcium aluminate slag) → (molten steel slag + molten steel) → (molten slag + aluminum ore) →, wherein the calcium aluminate slag and the vanadium slag are used as raw materials for extracting aluminum oxide and vanadium pentoxide, and compared with the traditional aluminum oxide production, the closed cycle process has the advantages of energy consumption, cost and CO2The discharge amount, the addition amount of CaO as a flux, the cost and the like are greatly reduced;
(3) by means of carbon dioxide or carbon dioxide mixtures, through CO2The + C-2 CO reaction reduces the consumption of reducing agent, realizes carbon emission reduction and carbon dioxide cyclic utilization, and reduces NOxThe sulfur-containing composite material is easy to collect dust, environment-friendly, clean and low in cost;
(4) the high calcium oxide metallurgical slag carries a large amount of molten flux CaO, the flux CaO is not needed or added in a small amount in the whole process, the cost is greatly reduced, and meanwhile, the molten flux CaO provides high chemical activity and heat to accelerate the reaction speed;
(5) no solid waste (red mud and the like) is discharged, the leaching slag can be directly used as cement, the environment is protected, the whole process can be circulated, and the method has the characteristics of greenness, cleanness, high efficiency and low cost;
(6) simultaneously recovering iron, chromium, vanadium, phosphorus, niobium, CaO and Al in the aluminum-containing mineral and the high calcium oxide metallurgical slag2O3、SiO2The high-efficiency and high-value utilization of the aluminum-containing mineral and the high calcium oxide metallurgical slag is realized by the aid of the equivalent components, and the red mud can be treated;
(7) the physical heat resource of the high calcium oxide metallurgical slag is utilized, the whole process does not need heating or little heating, and the energy consumption is low;
(8) the short-process slag bath smelting reduction process has high reaction speed;
(9) is a new alumina production method and is also an iron-making method;
(10) the method has the advantages of simple process technology, strong raw material adaptability, low metallurgical flux consumption, high yield, simple equipment, low investment, low energy consumption, continuous production, short flow, low cost and environmental friendliness;
(11) the unification of the physical heat efficient utilization of the slag, the mineral regeneration, the efficient utilization of the aluminum-containing resources and the circulation is realized.
Drawings
FIG. 1 is a schematic process flow diagram of a method for producing alumina by using slag metallurgy technology according to the invention.
Detailed Description
The present invention will be further described with reference to specific examples, which are, of course, only a few examples and are not intended to represent all embodiments of the present invention.
Example 1
A method for producing alumina by using slag metallurgy technology has a flow diagram as shown in figure 1, and specifically comprises the following steps:
step 1: using ferromanganese smelting slag as reaction slag, and drying and dehydrating high-grade bauxite (A/S)>6) The pulverized coal and the limestone are added into the submerged arc furnace, the molten state is maintained, and the molten slag simultaneously meets the following two parameters by adjusting the addition amount of each raw material: (a) CaO/Al in slag2O3(molar ratio) 1.61; (b) CaO/SiO2(mass ratio) 5.0;
blowing carbon dioxide into molten slag to perform slag bath melting reduction;
wherein, the dried and dehydrated high-grade bauxite and pulverized coal are added into an ore-smelting furnace by adopting carbon dioxide injection;
step 2: after the slag bath is melted and reduced, separating slag iron to obtain lower-layer vanadium-containing molten iron and upper-layer calcium aluminate slag;
and step 3: the lower layer of vanadium-containing molten iron is used as a raw material for vanadium extraction and steelmaking to obtain vanadium slag and semisteel, molten steel slag is obtained after the semisteel is subjected to steelmaking, and the molten steel slag is directly returned to the submerged arc furnace in the step 1 and is used as reaction slag;
and 4, step 4: cooling the upper calcium aluminate slag to room temperature to obtain self-powdered calcium aluminate slag, and leaching the self-powdered calcium aluminate slag (leaching condition is Na)2CO3The mass concentration of the leaching solution is 70g/L, the leaching temperature is 110 ℃, and the solution-solid ratio is Na2CO3Solution: self-powdering calcium aluminate slag 11 mL: 1g, leaching time 120min), obtaining sodium aluminate solution, adding into aluminateIntroducing CO into the sodium solution2Obtaining Al (OH)3，Al(OH)3Calcining to obtain alumina, and using the leached residue as raw material for producing cement.
In the embodiment, CaO and Al in ferromanganese smelting slag and high-grade bauxite2O3、SiO2The recovery rates of the iron and vanadium components are respectively 95%, 86%, 93%, 95% and 80%.
Example 2
A method for producing alumina by using a slag metallurgy technology, comprising the following steps:
step 1: magnesium smelting slag is used as reaction slag, added into an electric furnace, and air is used for spraying dried and dehydrated high-iron bauxite (full Fe) into the reaction slag>20 percent), limestone, lime and anthracite, an electric furnace is heated to keep a molten state, and the molten slag simultaneously meets the following two parameters by adjusting the adding amount of each raw material: (a) CaO/Al in slag2O3(molar ratio) 2.0; (b) CaO/SiO2(mass ratio) 4.1;
oxygen-enriched air is blown into molten slag to carry out slag bath melting reduction;
step 2: after the slag bath is melted and reduced, slag iron is separated, and chromium and vanadium in the raw materials enter the lower layer to obtain lower layer vanadium-containing ferrochrome water and upper layer calcium aluminate slag; the phosphorus component enters calcium aluminate slag and the soot, and the soot is flue gas generated by melting and reducing the slag.
And step 3: the lower layer of vanadium-containing ferrochrome water is used as a raw material for vanadium extraction and steelmaking to obtain vanadium-chromium slag and semisteel, after the semisteel is steelmaking, molten steel slag is obtained, and the molten steel slag is directly returned to the electric furnace in the step 1 to be used as reaction slag;
and 4, step 4: after the upper calcium aluminate slag is air-cooled to room temperature, self-powdered calcium aluminate slag is obtained and leached from the powdered calcium aluminate slag (leaching condition: Na)2CO3The mass concentration is 110g/L, the leaching temperature is 70 ℃, and the ratio of liquid to solid and Na2CO3Solution: self-powdering calcium aluminate slag 3 mL: 1g, leaching time 90min), obtaining sodium aluminate solution, and introducing CO into the sodium aluminate solution2Obtaining Al (OH)3，Al(OH)3Calcining to obtain alumina, and using the leached residue as raw material for producing cement.
In this example, CaO and Al in Mg-smelting slag and high-iron bauxite2O3、SiO2The recovery rates of the iron, chromium and vanadium components are respectively 96%, 88%, 94%, 96%, 81% and 83%.
Example 3
A method for producing alumina by using a slag metallurgy technology, comprising the following steps:
step 1: converter molten steel slag and blast furnace slag are used as reaction slag, and bituminous coal and molten reduction furnace are added, and oxygen-enriched air is used to spray dried and dewatered low-grade bauxite (A/S is less than or equal to 6) and high-grade bauxite (A/S) into the reaction slag>6) And lime is added into the molten slag, the molten slag and the lime are kept in a molten state, and the addition amount of each raw material is adjusted, so that the molten slag simultaneously meets the following two parameters: (a) CaO/Al in slag2O3(molar ratio) 1.8; (b) CaO/SiO2(mass ratio) 3.0;
blowing hot carbon dioxide and nitrogen mixed gas (the mixing volume is 1:1) into molten slag to carry out slag bath melting reduction;
step 2: after slag bath melting reduction, slag iron is separated, niobium in the raw materials enters a lower layer to obtain lower-layer niobium-containing molten iron and upper-layer calcium aluminate slag, and phosphorus components respectively enter the calcium aluminate slag and the soot;
and step 3: taking the lower-layer molten iron containing niobium as a raw material for niobium extraction and steelmaking to obtain niobium slag and semisteel, obtaining molten steel slag after the semisteel is subjected to steelmaking, and directly returning the molten steel slag to the melting reduction furnace in the step 1 to be used as reaction slag;
and 4, step 4: air cooling the upper calcium aluminate slag to room temperature to obtain self-powdering calcium aluminate slag and self-powdering calcium aluminate slag (leaching condition is Na)2CO3The mass concentration of the leaching solution is 80g/L, the leaching temperature is 90 ℃, and the solution-solid ratio is Na2CO3Solution: self-powdering calcium aluminate slag 5 mL: 1g, leaching time 100min) to obtain sodium aluminate solution, introducing CO into the sodium aluminate solution2Obtaining Al (OH)3，Al(OH)3Calcining to obtain alumina, and using the leached residue as raw material for producing cement.
In this example, the converter melts the steel slag, the blast furnace slag, the low-grade bauxite, and the CaO and Al in the high-grade bauxite2O3、SiO2The recovery rates of the iron and niobium components are 94%, 86%, 93%, 97% and 82%.
Example 4
A method for producing alumina by using a slag metallurgy technology, comprising the following steps:
step 1: using the molten steel slag of the converter as reaction slag, and drying and dehydrating low-grade bauxite (A/S is less than or equal to 6) and high-grade bauxite (A/S)>6) Lime and lignite are added into the heat-preservation slag ladle to keep a molten state, and the molten slag simultaneously meets the following two parameters by adjusting the adding amount of each raw material: (a) CaO/Al in slag2O3(molar ratio) 1.7; (b) CaO/SiO2(mass ratio) 3.5;
blowing hot air into molten slag to melt and reduce the slag bath.
Step 2: after the slag bath is melted and reduced, separating slag iron to obtain a lower-layer vanadium-containing molten iron phase and an upper-layer calcium aluminate molten slag phase;
and step 3: the lower layer of vanadium-containing molten iron is used as a raw material for vanadium extraction and steelmaking to obtain vanadium slag and semisteel, molten steel slag is obtained after semisteel steelmaking, and the molten steel slag is directly returned to the heat-preservation slag ladle in the step 1 and is used as reaction slag;
and 4, step 4: air cooling the upper calcium aluminate slag to room temperature to obtain self-powdering calcium aluminate slag and self-powdering calcium aluminate slag (leaching condition is Na)2CO3The mass concentration of the leaching solution is 100g/L, the leaching temperature is 110 ℃, and the solution-solid ratio is Na2CO3Solution: self-powdering calcium aluminate slag 6 mL: 1g, leaching time 95min) to obtain sodium aluminate solution, introducing CO into the sodium aluminate solution2Obtaining Al (OH)3，Al(OH)3Calcining to obtain alumina, and using the leached residue as raw material for producing cement.
In this example, the converter melts the steel slag and CaO and Al in the bauxite2O3、SiO2The recovery rates of the iron and vanadium components are 97%, 90%, 95%, 94% and 85% respectively.
Example 5
A method for producing alumina by using a slag metallurgy technology, comprising the following steps:
step 1: using electric furnace molten steel slag as reaction slag, and drying and dewatering high-iron bauxite (full Fe)>20 percent), fly ash, lime and lignite are added into an electric arc furnace, pre-reduced iron-containing bauxite pellets are added, a molten state is maintained, and the molten slag simultaneously meets the following two parameters by adjusting the addition amount of each raw material: (a) CaO/Al in slag2O3(molar ratio) 1.8; (b) CaO/SiO2(mass ratio) 4.2;
blowing hot air into molten slag to perform slag bath melting reduction;
step 2: after the slag bath is melted and reduced, slag iron is separated, and vanadium in the raw materials enters lower-layer molten iron to obtain lower-layer vanadium-containing molten iron and upper-layer calcium aluminate slag;
and step 3: the lower layer of vanadium-containing molten iron is used as a raw material for vanadium extraction and steelmaking to obtain vanadium slag and semisteel, after the semisteel is steelmaking, molten steel slag is obtained, and the molten steel slag is directly returned to the electric arc furnace in the step 1 and is used as reaction slag;
and 4, step 4: air cooling the upper calcium aluminate slag to room temperature to obtain self-powdering calcium aluminate slag and self-powdering calcium aluminate slag (leaching condition: Na)2CO3The mass concentration is 90g/L, the leaching temperature is 100 ℃, and the ratio of liquid to solid and Na2CO3Solution: self-powdering calcium aluminate slag-8 mL: 1g, leaching time 100min) to obtain sodium aluminate solution, introducing CO into the sodium aluminate solution2Obtaining Al (OH)3，Al(OH)3Calcining to obtain alumina, and using the leached residue as raw material for producing cement.
In this example, CaO and Al in the molten steel slag, high-iron bauxite and fly ash of the electric furnace2O3、SiO2The recovery rate of the iron and vanadium components is 95%, 91%, 95% and 86%.
Example 6
A method for producing alumina by using a slag metallurgy technology, comprising the following steps:
step 1: adding molten steel slag of an electric furnace into a short blast furnace as reaction slag, and spraying dried and dehydrated high-iron bauxite (full Fe) into the reaction slag by using nitrogen>20 percent), the coal gangue and the lime are kept in a molten state, and the molten slag simultaneously meets the following two parameters by adjusting the adding amount of each raw material: (a) CaO/Al in slag2O3(molar ratio) 1.7; (b) CaO/SiO2(mass ratio) 4.0;
blowing hot air and natural gas into molten slag to perform slag bath melting reduction;
step 2: after the slag bath is melted and reduced, separating slag iron to obtain lower-layer vanadium-containing molten iron and upper-layer calcium aluminate slag;
and step 3: taking vanadium-containing molten iron as a raw material for vanadium extraction and steelmaking to obtain vanadium slag and semisteel, obtaining molten steel slag after semisteel steelmaking, and directly returning the molten steel slag to the short blast furnace in the step 1 to be used as reaction slag;
and 4, step 4: after the calcium aluminate slag is cooled in air to room temperature, self-powdering calcium aluminate slag is obtained, and the self-powdering calcium aluminate slag is leached under the condition of Na2CO3The mass concentration is 110g/L, the leaching temperature is 110 ℃, and the ratio of liquid to solid and Na2CO3Solution: self-powdering calcium aluminate slag 7 mL: 1g, leaching time 120min) to obtain sodium aluminate solution, introducing CO into the sodium aluminate solution2Obtaining Al (OH)3，Al(OH)3Calcining to obtain alumina, and using the leached residue as raw material for producing cement.
In this example, the electric furnace melts steel slag and high-iron bauxite (all Fe)>20 percent), CaO and Al in the coal gangue2O3、SiO2The recovery rates of the iron and vanadium components are respectively 94%, 86%, 93% and 83%.
Example 7
A method for producing alumina by using a slag metallurgy technology, comprising the following steps:
step 1: electric furnaceMolten steel slag as reaction slag and dried and dehydrated high-iron bauxite (full Fe)>20 percent), coal gangue and lime are added into a melting reduction furnace, the melting state is kept, and the molten slag simultaneously meets the following two parameters by adjusting the adding amount of each raw material: (a) CaO/Al in slag2O3(molar ratio) 1.9; (b) CaO/SiO2(mass ratio) 3.9;
blowing hot air and coal bed gas into molten slag to perform slag bath smelting reduction;
step 2: after the slag bath is melted and reduced, separating slag iron to obtain a lower-layer vanadium-containing molten iron phase and an upper-layer calcium aluminate molten slag phase;
and step 3: taking vanadium-containing molten iron as a raw material for vanadium extraction and steelmaking to obtain vanadium slag and semisteel, obtaining molten steel slag after semisteel steelmaking, and directly returning the molten steel slag to the smelting reduction furnace in the step 1 to be used as reaction slag;
and 4, step 4: after the calcium aluminate slag is cooled in air to room temperature, self-powdering calcium aluminate slag is obtained, and the self-powdering calcium aluminate slag is leached under the condition of Na2CO3The mass concentration of the leaching solution is 100g/L, the leaching temperature is 100 ℃, and the solution-solid ratio is Na2CO3Solution: self-pulverized calcium aluminate slag 4 mL: 1g, leaching time 120min) to obtain sodium aluminate solution, introducing CO into the sodium aluminate solution2Obtaining Al (OH)3，Al(OH)3Calcining to obtain alumina, and using the leached residue as raw material for producing cement.
In this example, CaO and Al are contained in the molten steel slag, high-iron bauxite, and coal gangue in the electric furnace2O3、SiO2The recovery rates of the iron, chromium, vanadium and niobium components are 97%, 94%, 96%, 97% and 85% respectively.
Example 8
A method for producing alumina by using a slag metallurgy technology, comprising the following steps:
step 1: adding the converter molten steel slag serving as reaction slag, dried and dehydrated clay, kaolin, bauxite, feldspar and lime into a heat-preservation slag ladle, keeping the molten state, and adjusting the adding amount of each raw material to ensure that the molten steel slag is moltenThe slag in the state simultaneously satisfies the following two parameters: (a) CaO/Al in slag2O3(molar ratio) 2.0; (b) CaO/SiO2(mass ratio) 3.2;
blowing hot air and coal gas into molten slag to perform slag bath melting reduction;
step 2: after the slag bath is melted and reduced, separating slag iron to obtain lower molten iron and an upper calcium aluminate slag phase;
and step 3: molten iron is used as a raw material for steelmaking to obtain molten steel slag, and the molten steel slag is directly returned to the heat-preservation slag ladle in the step 1 to be used as reaction slag;
and 4, step 4: after the calcium aluminate slag is cooled in air to room temperature, self-powdering calcium aluminate slag is obtained and the self-powdering calcium aluminate slag is obtained (the leaching condition is Na)2CO3The mass concentration is 80g/L, the leaching temperature is 110 ℃, and the ratio of liquid to solid and Na2CO3Solution: self-powdering calcium aluminate slag 5 mL: 1g, leaching time 100min) to obtain sodium aluminate solution, introducing CO into the sodium aluminate solution2Obtaining Al (OH)3，Al(OH)3Calcining to obtain alumina, and using the leached residue as raw material for producing cement.
In this example, the converter melts the slag, clay, kaolin, bauxite, CaO and Al in feldspar2O3、SiO2The recovery rate of the iron component is 97%, 92%, 96% and 97%.
Example 9
A method for producing alumina by using a slag metallurgy technology, comprising the following steps:
step 1: adding molten steel slag of a converter serving as reaction slag into a heat-preservation pit with the temperature of 1600 ℃, and spraying dried and dehydrated high-grade bauxite (A/S) into the reaction slag by using carbon dioxide gas>6) And adding lime into nepheline and alum, keeping the molten state, and adjusting the adding amount of each raw material to ensure that the molten slag simultaneously meets the following two parameters: (a) CaO/Al in slag2O3(molar ratio) 2.2; (b) CaO/SiO2(mass ratio) 3.1;
blowing hot air and pulverized coal into molten slag to perform slag bath melting reduction;
step 2: after the slag bath is melted and reduced, separating slag iron to obtain a lower-layer vanadium-containing molten iron phase and an upper-layer calcium aluminate molten slag phase;
and step 3: taking vanadium-containing molten iron as a raw material for vanadium extraction and steelmaking to obtain vanadium slag and semisteel, steelmaking the semisteel to obtain molten steel slag, and directly returning the molten steel slag to the heat-preservation pit in the step 1 to be used as reaction slag;
and 4, step 4: after the calcium aluminate slag is cooled in air to room temperature, self-powdering calcium aluminate slag is obtained and leached from the self-powdering calcium aluminate slag (leaching condition is Na)2CO3The mass concentration is 80g/L, the leaching temperature is 80 ℃, and the ratio of liquid to solid and Na2CO3Solution: self-powdering calcium aluminate slag 6 mL: 1g, leaching time 100min) to obtain sodium aluminate solution, introducing CO into the sodium aluminate solution2Obtaining Al (OH)3，Al(OH)3Calcining to obtain alumina, and using the leached residue as raw material for producing cement.
In this example, the converter melts CaO and Al in steel slag, high-grade bauxite, nepheline and alum2O3、SiO2The recovery rates of the iron and vanadium components are respectively 96%, 88%, 95%, 94% and 82%.
Example 10
A method for producing alumina by using a slag metallurgy technology, comprising the following steps:
step 1: adding molten steel slag of a converter into an induction furnace as reaction slag, and spraying dried and dehydrated high-grade bauxite (A/S) into the reaction slag by using mixed gas of carbon dioxide and nitrogen>6) Keeping the molten state, and adjusting the adding amount of each raw material to ensure that the molten slag simultaneously satisfies the following two parameters: (a) CaO/Al in slag2O3(molar ratio) 1.4; (b) CaO/SiO2(mass ratio) 4.9;
blowing pure oxygen and pulverized coal into molten slag to perform slag bath melting reduction;
step 2: after the slag bath is melted and reduced, separating slag and iron to obtain a lower vanadium-containing ferrochromium water layer and an upper calcium aluminate slag phase;
and step 3: taking the vanadium-chromium-containing molten iron as a raw material for vanadium-chromium extraction steelmaking to obtain vanadium-chromium slag and semisteel, obtaining molten steel slag after the semisteel is subjected to steelmaking, and directly returning the molten steel slag to the induction furnace in the step 1 to be used as reaction slag;
and 4, step 4: after the calcium aluminate slag is cooled in air to room temperature, self-powdering calcium aluminate slag is obtained, and the self-powdering calcium aluminate slag is leached under the condition of Na2CO3The mass concentration is 100g/L, the leaching temperature is 90 ℃, and the ratio of liquid to solid and Na2CO3Solution: self-pulverized calcium aluminate slag 4 mL: 1g, leaching time 110min) to obtain sodium aluminate solution, introducing CO into the sodium aluminate solution2Obtaining Al (OH)3，Al(OH)3Calcining to obtain alumina, and using the leached residue as raw material for producing cement.
In this example, CaO and Al are contained in the molten steel slag and the high-grade bauxite of the converter2O3、SiO2The recovery rates of the iron, chromium and vanadium components are respectively 96%, 80%, 96%, 95%, 82% and 81%.

Claims (10)

1. A method for producing alumina by using a slag metallurgy technology is characterized by comprising the following steps;
step 1:
adding the high calcium oxide metallurgical slag into a melting reactor to form reaction slag; the mass percentage of CaO in the high-calcium-oxide metallurgical slag is more than or equal to 30 percent, the high-calcium-oxide metallurgical slag is directly obtained from a metallurgical furnace, and the temperature of the slag is more than or equal to 1100 ℃;
adding aluminum ore and a reducing agent into reaction slag, and keeping the molten state to obtain molten slag; wherein the mass percentage content of alumina in the aluminum ore is more than or equal to 10 percent;
the chemical composition of the molten slag is regulated and controlled by regulating the adding amount of each raw material, so that the molten slag simultaneously meets the following two conditions:
(a) in molten slag, the molar ratio of CaO: al (Al)2O3>1.6；
(b) In molten slag, according toMass ratio, CaO: SiO 22＝3.0～5.0；
Blowing oxidizing gas or mixed gas of the oxidizing gas and nitrogen into molten slag to perform slag bath smelting reduction;
step 2:
after the slag bath is melted and reduced, separating slag and iron to obtain lower molten iron and upper calcium aluminate slag;
and step 3:
the lower layer molten iron is directly used as a steelmaking raw material, and after steelmaking, the obtained molten steel slag directly returns to the step 1 and enters a melting reactor;
and 4, step 4:
cooling the upper calcium aluminate slag to obtain self-powdered calcium aluminate slag; adding Na into self-powdering calcium aluminate slag2CO3Leaching the solution to obtain a sodium aluminate solution and leaching residues;
introducing CO into the sodium aluminate solution2To obtain Al (OH)3，Al(OH)3Calcining to obtain the alumina.
2. The method for producing alumina using a slag metallurgy technique according to claim 1, wherein, in the reaction slag, when the addition amount of each raw material is adjusted, the molten slag cannot satisfy both of the following conditions: (a) in molten slag, the molar ratio of CaO: al (Al)2O3>1.6; (b) in molten slag, the mass ratio of CaO: SiO 22Adding an alkaline flux for regulation, wherein the content of the alkaline flux is 3.0-5.0%; the alkaline flux is one or two of limestone and lime.
3. The method for producing alumina by using the slag metallurgy technology according to the claim 1 or 2, wherein in the step 1, the high calcium oxide metallurgy slag is one or more of molten steel slag, blast furnace slag, ferromanganese smelting slag and magnesium smelting slag.
4. The method for producing alumina according to claim 1 or 2, wherein the smelting reactor in step 1 is one of an electric furnace, a submerged arc furnace, an electric arc furnace, a short blast furnace, an induction furnace, a smelting reduction furnace, a heat-preserving slag ladle and a heat-preserving pit, and the smelting reduction temperature is 1400-1650 ℃.
5. The method for producing aluminum oxide by using the molten slag metallurgy technology according to the claim 1 or 2, wherein in the step 1, the aluminum ore is one or more of bauxite, high-iron bauxite with the total Fe content of more than 20% by mass, pre-reduced iron-containing bauxite pellets, fly ash, coal gasification furnace slag, coal gangue, nepheline, alum, clay, kaolinite, bauxite, feldspar, shale and red mud;
when the aluminum ore contains crystal water, drying and dehydrating treatment needs to be carried out in advance, wherein the drying temperature is less than 600 ℃;
the aluminum ore is powdery or spherical and is directly added or injected into the reaction slag, and the gas for injecting the aluminum ore is nitrogen and/or oxidizing gas; the oxidizing gas is air, oxygen-enriched air, oxygen and CO2One or more of them.
6. The method for producing alumina by using the molten slag metallurgy technology according to the claim 1 or 2, wherein in the step 1, the reducing agent is one or more of anthracite, bituminous coal, lignite, pulverized coal, natural gas, coal bed gas and coal gas, the solid reducing agent in the reducing agent is directly added or injected, and the gas for injecting the solid reducing agent is nitrogen and/or oxidizing gas; the oxidizing gas is air, oxygen-enriched air, oxygen and CO2One or more of them.
7. The method for producing alumina according to claim 1 or 2, wherein the oxidizing gas in step 1 is air, oxygen-enriched air, oxygen, CO2One or more of them.
8. The method for producing alumina by using the slag metallurgy technology according to the claim 1 or the claim 2, wherein, in the step 1, the slag bath melting reduction process is as follows: the reduction rate of the iron oxide reduced into metallic iron is more than or equal to 90 percent.
9. The method for producing alumina by using the slag metallurgy technology according to the claim 1 or 2, wherein in the step 2, the molten iron is one of common molten iron, vanadium-containing molten iron, niobium-containing molten iron and vanadium-containing ferrochrome molten iron; when the lower layer molten iron is vanadium-containing molten iron, niobium-containing molten iron and vanadium-containing ferrochrome-containing molten iron, semisteel and slag are obtained after vanadium-chromium-niobium extraction steelmaking, wherein the slag is one of vanadium slag, niobium slag and vanadium-chromium slag, and the obtained molten steel slag directly returns to the step 1 to enter the melting reactor after the semisteel steelmaking.
10. The method for producing alumina according to claim 1 or 2, wherein in the step 4, Na is added2CO3The solution is 70-110 g/L in mass concentration, the leaching temperature is 70-110 ℃, and Na is added according to the liquid-solid ratio2CO3Solution: self-pulverized calcium aluminate slag ═ (3-11) mL: 1g, and the leaching time is 90-120 min.
CN202110082072.5A 2021-01-21 2021-01-21 Method for producing alumina by using slag metallurgy technology Pending CN112707424A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202110082072.5A CN112707424A (en) 2021-01-21 2021-01-21 Method for producing alumina by using slag metallurgy technology
PCT/CN2021/086846 WO2022156076A1 (en) 2021-01-21 2021-04-13 Method for producing aluminum oxide using slag metallurgy technology

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110082072.5A CN112707424A (en) 2021-01-21 2021-01-21 Method for producing alumina by using slag metallurgy technology

Publications (1)

Publication Number Publication Date
CN112707424A true CN112707424A (en) 2021-04-27

Family

ID=75550500

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110082072.5A Pending CN112707424A (en) 2021-01-21 2021-01-21 Method for producing alumina by using slag metallurgy technology

Country Status (2)

Country Link
CN (1) CN112707424A (en)
WO (1) WO2022156076A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114480745A (en) * 2022-01-29 2022-05-13 北京工业大学 Method for recycling iron in steel slag by utilizing gasified slag
CN115159552A (en) * 2022-07-04 2022-10-11 重庆大学 Method for recovering aluminum oxide from aluminum-containing resources
CN115301716A (en) * 2022-10-08 2022-11-08 淄博益海环保科技有限公司 Comprehensive utilization process for solid waste of red mud, fly ash, steel slag and coal gangue

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106755654A (en) * 2016-12-10 2017-05-31 东北大学 A kind of method of slag metallurgy melting also original production

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
HU179977B (en) * 1977-02-23 1983-01-28 Akad Gorniczo Hutnicza Process for preparing aluminium oxide
CN1424256A (en) * 2002-12-23 2003-06-18 广西壮族自治区河池地区矿业有限责任公司 Production of aluminum oxide from iron containing bauxite
CN102851425B (en) * 2012-08-17 2014-10-08 东北大学 Method for high-efficiency separation and comprehensive utilization of iron, aluminum and sodium in high-iron red mud
CA2842587C (en) * 2013-02-12 2018-09-04 9255-8444 QUEBEC INC. dba METKEM INNOVATION Method for the production and the purification of molten calcium aluminate using contaminated aluminum dross residue

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106755654A (en) * 2016-12-10 2017-05-31 东北大学 A kind of method of slag metallurgy melting also original production

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
W.富尔达等: "《氧化铝和铝 上册》", 31 January 1960 *
朱苗勇等: "《现代冶金工艺学 钢铁冶金卷》", 31 December 2016 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114480745A (en) * 2022-01-29 2022-05-13 北京工业大学 Method for recycling iron in steel slag by utilizing gasified slag
CN115159552A (en) * 2022-07-04 2022-10-11 重庆大学 Method for recovering aluminum oxide from aluminum-containing resources
CN115159552B (en) * 2022-07-04 2024-01-26 重庆大学 Method for recycling aluminum oxide from aluminum-containing resource
CN115301716A (en) * 2022-10-08 2022-11-08 淄博益海环保科技有限公司 Comprehensive utilization process for solid waste of red mud, fly ash, steel slag and coal gangue
CN115301716B (en) * 2022-10-08 2023-01-17 淄博益海环保科技有限公司 Comprehensive utilization process for solid waste of red mud, fly ash, steel slag and coal gangue

Also Published As

Publication number Publication date
WO2022156076A1 (en) 2022-07-28

Similar Documents

Publication Publication Date Title
CN112707424A (en) Method for producing alumina by using slag metallurgy technology
CN102168156B (en) Iron and aluminum melting separation method for complicated and hard-dressing aluminum and iron intergrowth ore
CN102851425B (en) Method for high-efficiency separation and comprehensive utilization of iron, aluminum and sodium in high-iron red mud
CN105969981B (en) A kind of technique of vanadium titano-magnetite comprehensive utilization
WO2019071792A1 (en) Production method based on smelting reduction of slag containing zinc and iron
CN107287367B (en) A method of iron is recycled using iron red mud
CN101857910B (en) Method for melting, reducing and smelting high-titanium iron ore by oxygen-enriched top blowing
CN102605185B (en) Comprehensive utilization method for iron-aluminium paragenetic mine
CN101984080A (en) Process and device for separating iron and aluminum silica slag from red mud and removing alkali metal
CN114672643B (en) Method for synergistically utilizing high-iron red mud and molten steel slag
WO2019071790A1 (en) Method for recovering valuable components from mixed slag containing zinc and iron
CN101285128A (en) Comprehensive reutilization method for laterite-nickel ore
CN110564906A (en) Method for separating and enriching vanadium from iron ore concentrate and producing pure iron
Zhang et al. A review of comprehensive utilization of high-iron red mud of China
CN113337661B (en) Method for modifying molten steel slag by double molten pool furnaces
CN112981028B (en) Method for extracting iron element from red mud
CN110484734A (en) A kind of method of iron red mud high magnetic pre-selection-drastic reduction melting
WO2023193714A1 (en) Method and system for coupling copper slag recycling with co2 mineralization based on industrial solid waste
CN115679097B (en) Method for recycling ironmaking gas ash by using converter slag and refining dust
CN115261540B (en) Method for recovering iron and tailings in red mud
CN110564956A (en) Smelting system for separating and enriching vanadium and producing pure iron from iron ore concentrate
CN102181776A (en) Technique and device for producing high-grade nickel and stainless steel by reduction pelletization
CN214327826U (en) Treatment and utilization device for recovering zinc oxide by smelting reduction of suspended metallurgical zinc-containing ash
CN112391535A (en) Treatment and utilization device and method for recovering zinc oxide from metallurgical zinc-containing ash by suspension smelting reduction
CN110512081A (en) The method of iron red mud high magnetic pre-selection-suspended state direct-reduction-high temperature melting point

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination