WO2018014363A1 - Procédé de réduction par fusion, de recyclage et de revenu de scories mélangées titanifères - Google Patents

Procédé de réduction par fusion, de recyclage et de revenu de scories mélangées titanifères Download PDF

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WO2018014363A1
WO2018014363A1 PCT/CN2016/091699 CN2016091699W WO2018014363A1 WO 2018014363 A1 WO2018014363 A1 WO 2018014363A1 CN 2016091699 W CN2016091699 W CN 2016091699W WO 2018014363 A1 WO2018014363 A1 WO 2018014363A1
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slag
titanium
vanadium
iron
mixed
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PCT/CN2016/091699
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张力
张武
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东北大学
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B3/00—General features in the manufacture of pig-iron
    • C21B3/04—Recovery of by-products, e.g. slag
    • C21B3/06—Treatment of liquid slag
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B11/00—Making pig-iron other than in blast furnaces
    • 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
    • C22B34/1218—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 obtaining titanium or titanium compounds from ores or scrap by dry processes
    • C22B34/1222—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 obtaining titanium or titanium compounds from ores or scrap by dry processes using a halogen containing agent
    • 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
    • C22B34/1218—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 obtaining titanium or titanium compounds from ores or scrap by dry processes
    • C22B34/1227—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 obtaining titanium or titanium compounds from ores or scrap by dry processes using an oxygen containing agent
    • 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
    • C22B34/20—Obtaining niobium, tantalum or vanadium
    • C22B34/22—Obtaining vanadium
    • 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
    • C22B7/001—Dry 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
    • Y02P10/20—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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies

Definitions

  • the invention belongs to the field of non-blast furnace ironmaking and comprehensive utilization of resources, and particularly relates to a method for smelting reduction recovery and quenching and tempering treatment of titanium-containing mixed slag.
  • Vanadium-titanium magnetite is a composite ore of symbiotic elements of iron, vanadium, titanium, chromium, phosphorus, copper, nickel, cobalt, lanthanum, cerium, zirconium and hafnium.
  • Vanadium-titanium magnetite beneficiation one blast furnace ironmaking-iron-water blowing vanadium slag-converter steelmaking smelting process, vanadium slag one-sodium or calcification roasting process, realizing vanadium-titanium magnetism
  • the large-scale utilization of iron ore has produced solid wastes such as titanium-containing blast furnace slag, vanadium-containing titanium steel slag, and vanadium tailings.
  • Vanadium-containing titanium waste contains high content of iron, vanadium, titanium, chromium, phosphorus and other valuable elements, which is an important secondary resource.
  • the titanium-containing blast furnace slag is produced in the blast furnace ironmaking process of vanadium-titanium magnetite, and has a TiO 2 content of 4 to 30%, a vanadium-containing pig iron content of 4 to 8%, and a vanadium pentoxide content of 0.1 to 0.5%, and contains Titanium blast furnace slag is an important secondary resource; chromium-containing blast furnace slag temperature is higher than or equal to 1300 °C, and a large amount of physical heat is emitted every year. Therefore, titanium is contained. Blast furnace slag is also an important physical thermal resource.
  • the vanadium-containing titanium steel slag is produced in the steelmaking process of vanadium-titanium magnetite, and has a TiO 2 content of 0.5 to 10%, a metal iron content of 4 to 12%, an iron oxidation content of 10 to 35%, and a vanadium pentoxide content of 0.5 to 5%, phosphorus pentoxide content is 0.2 to 6%, chromium trioxide content is 0.1 to 5%, and contains a certain amount of free calcium oxide (about 10%).
  • Vanadium-containing titanium steel slag is an important secondary resource; the temperature of vanadium-containing titanium molten steel slag is higher than or equal to 1500 ° C, and a large amount of physical heat is discharged every year. Therefore, the vanadium-containing titanium molten steel slag is also an important physical heat resource.
  • the titanium-containing blast furnace slag and the vanadium-containing titanium steel slag belong to the same artificial minerals, and the phase containing titanium, vanadium, iron, phosphorus, calcium and the like are finely dispersed, which is difficult to treat, and the comprehensive utilization problem has not been solved efficiently.
  • China emits more than 20 million tons of titanium-containing blast furnace slag per year, and has accumulated more than 100 million tons of titanium-containing blast furnace slag, equivalent to more than 15 million tons of TiO 2 , more than 15 million tons of vanadium-containing pig iron, and more than 300,000 tons of vanadium pentoxide. The total value is trillions.
  • Titanium-containing blast furnace slag and vanadium-containing titanium steel slag are important metallurgical resources, containing not only valuable components such as iron, vanadium, titanium and chromium, but also a large amount of metallurgical fluxes such as CaO and SiO 2 .
  • a lot of researches have been done on the comprehensive utilization of titanium-containing blast furnace slag and vanadium-containing titanium steel slag at home and abroad, and some results have been achieved.
  • many methods, although technically feasible, are not economically viable and still cannot be used. For industrial applications and development.
  • titanium extraction by alkali method titanium extraction by acid method, preparation of titanium-containing alloy, titanium-containing blast furnace slag carbonitriding titanium, high-temperature modification-precipitation-mineralization separation, and use as building materials.
  • the sulfuric acid or hydrochloric acid method extracts and separates the titanium-containing blast furnace slag, and the consumption of acid is large, and a large amount of waste acid and tailings are generated, which seriously pollutes the environment.
  • Hydrochloric acid leaching and natural cooling of titanium-containing blast furnace slag is a way to utilize titanium-containing blast furnace slag.
  • the leaching residue has no suitable use, that is, a new one is produced after leaching of hydrochloric acid. Waste.
  • Titanium-containing blast furnace slag carbonitriding titanium is a way to utilize titanium-containing blast furnace slag, and there are some obvious shortcomings.
  • the key problem of excessive carbonization power consumption of electric furnace is not solved, and electricity costs account for 70-80 of the total cost of carbonized slag. Above 5%, a large amount of chlorinated residue is generated, which causes serious secondary pollution.
  • problems such as the bottom of the furnace and some smelting furnaces have serious problems such as foam slag, and production is difficult to continue.
  • cement raw materials require TiO 2 ⁇ 10wt% in slag, if TiO 2 > 10wt%, it will not be used as cement raw material. Used as cast stone, slag cotton, etc., with a small amount of treatment.
  • the method in the above two patents can only realize the effective utilization of a kind of slag, that is, titanium-containing blast furnace slag, low chemical activity, low temperature, high treatment cost, and poor effect of migration, enrichment and growth of iron and titanium components. The recovery rate is low, only the iron and titanium groups can be recycled and utilized, and the effective enrichment of valuable elements is not realized; 2.
  • the method in the above two patents can only utilize one kind of slag, namely titanium-containing blast furnace slag, single slag- Titanium-containing blast furnace slag slag temperature is low, need to compensate a large amount of heat, high cost, complicated operation; 3. Can not handle cold titanium-containing blast furnace slag; 4.
  • Both of the above two patents need to add SiO 2 , CaO, CaF 2 and other additives
  • the temperature of the slag is rapidly decreased, and a part of the heat in the slag is wasted. Therefore, it is necessary to compensate the heat, waste energy, increase the cost, and increase the complexity of the treatment process; 5.
  • the above two inventions The separation methods used in the process are all combined with flotation and hydrometallurgical methods. Flotation separation and hydrometallurgical separation process are likely to cause environmental pollution.
  • the titanium-containing steel slag mainly adopts the water quenching process and the steel slag “squeaky tank” treatment process, and magnetically recovers the metal iron in the slag, but the recovery rate is low, and the residual metal iron content in the slag is as high as 5%, and the process only considers the metal in the recovered slag. Iron, iron oxides containing up to 30% or more of the recovered slag are not considered.
  • the water quenching process and the steel slag “squeaky tank” treatment process consume a large amount of water resources, generate corrosive hot steam, heat cannot be recycled, water resources cannot be recycled, and a large amount of heat resources are difficult to be utilized.
  • the free CaO and MgO in the slag reduce the stability of the steel slag volume, and the higher content of iron oxide increases the difficulty of grinding and limits the application of steel slag.
  • the comprehensive utilization of vanadium components in vanadium-containing titanium steel slag is still in the research stage, and there is no recycling of titanium. Therefore, the vanadium-containing titanium steel slag is accumulated in a large amount, which pollutes the environment and wastes resources.
  • the blast furnace liquid molten titanium-containing blast furnace slag and vanadium-containing molten steel slag contain abundant thermal energy resources, contain a large amount of hot metallurgical flux, and contain high content of iron, vanadium, titanium, chromium, phosphorus, calcium and other valuables. Elements are important secondary resources.
  • the liquid molten titanium-containing blast furnace slag is a reducing slag, and the vanadium-containing molten steel slag is an oxidizing slag, and both are slag systems excellent in physical and chemical properties.
  • the method for separating iron titanium vanadium calcium from slag (containing titanium blast furnace slag and vanadium-containing titanium molten steel slag), the invention has the following advantages: (1) the raw material is liquid molten titanium-containing blast furnace slag ( ⁇ 1300 ° C) flowing out from the slag outlet And steel slag ( ⁇ 1500 °C), with high temperature, high heat characteristics, make full use of slag physical heat resources, and save energy efficiently; (2) due to high content of free calcium oxide in liquid molten titanium blast furnace slag, liquid The molten converter steel slag has a high content of low-valent titanium oxide, has high chemical activity under high temperature conditions, and easily realizes migration and enrichment of vanadium, titanium, iron and calcium components, and can simultaneously recover titanium components in the mixed slag, Iron component, vanadium component and free calcium oxide component, achieve high-efficiency comprehensive recovery of secondary resources, recycle and utilize physical heat resources of titanium-containing blast furnace slag and vanadium-containing titanium molten steel slag; (3)
  • the present invention provides a method for smelting reduction recovery and quenching and tempering treatment of titanium-containing mixed slag.
  • the method is a method for recovering vanadium-containing pig iron or vanadium-containing steel, titanium-rich phase, vanadium-rich phase, phosphorus-rich phase and slag by containing titanium mixed slag; the method has short reaction time and high metal recovery rate
  • the invention has the advantages of low production cost, strong raw material adaptability, large processing capacity, environmental friendliness and high economic benefit, and can effectively solve the problem of efficient recycling of metallurgical resources and thermal energy; the method of the invention is a new smelting reduction oxidation process.
  • the method for smelting reduction recovery and quenching and tempering treatment of the titanium-containing mixed slag of the invention fully utilizes the physical heat resource of the titanium-containing blast furnace slag and the vanadium-containing titanium molten steel slag and the hot metallurgical flux, and the reducing property of the titanium-containing blast furnace slag
  • the oxidizing property of the vanadium-containing titanium molten steel slag is achieved by mixing two kinds of slags and spraying an oxidizing gas to achieve smelting reduction and oxidation: 1 the titanium component in the mixed slag is sufficiently oxidized under an oxidizing atmosphere, the iron oxide It is fully reduced to metal iron; 2 the vanadium-containing metal iron component in the mixed slag is aggregated, grown and settled; 3 the titanium and calcium components in the mixed slag migrate, enrich in the perovskite phase, and achieve long Large and sedimentation; the vanadium components in the mixed slag migrate and concentrate in the metallic iron phase and the vanadium-rich phase
  • Step 1 slag mixing:
  • the titanium-containing blast furnace slag: vanadium-containing titanium molten steel slag 100: (1 ⁇ 1000) ingredients, added to the heat preservation device, the pourable smelting reaction device or the fixed smelting reaction device to form the titanium-containing mixed slag a smelting reduction reaction occurs; the temperature of the titanium-containing mixed slag is controlled within a set temperature range;
  • the set temperature range is 1400 ⁇ 1600 ° C;
  • the temperature range of the titanium-containing mixed slag is set to 1400 to 1600 ° C;
  • the temperature range of the titanium-containing mixed slag is set to 1450 ⁇ 1600 ° C;
  • the method for controlling the temperature of the titanium-containing mixed slag in the set temperature range is:
  • the fuel or the vanadium-containing titanium molten steel slag is added to the titanium-containing mixed slag by the heating function of the reaction device itself, or the titanium-containing mixed slag is added.
  • the temperature reaches the set temperature range;
  • the temperature of the titanium-containing mixed slag is higher than the upper limit of the set temperature range, one or more of the vanadium-containing titanium material, the iron-containing material, the fluorine-containing material or the titanium-containing blast furnace slag are added to the titanium-containing mixed slag, Bringing the temperature of the titanium-containing mixed slag to a set temperature range;
  • Injecting gas a preheating oxidizing gas is sprayed into the titanium-containing mixed slag; wherein the preheating temperature of the oxidizing gas is 0 to 1200 ° C, and the relationship between the oxidizing gas time and the flow rate is 1 to 105L/(min ⁇ kg);
  • the remaining low-valent titanium is oxidized to high-priced titanium, and the remaining iron oxide is reduced to metallic iron;
  • the control method is:
  • step 1 The method for controlling the temperature of the titanium-containing mixed slag in the set temperature range in step 1;
  • a reducing agent is added to the titanium-containing mixed slag to reduce the iron oxide to metal iron in the titanium-containing mixed slag;
  • vanadium-containing metal iron is settled to the bottom of the reaction device to form iron shovel, and the iron shovel is manually taken out; the vanadium-containing metal iron layer in the remaining slow slag is crushed to a particle size of 20-400 ⁇ m, ground and magnetically separated. Remaining vanadium containing metal iron;
  • tailings recycling There are two kinds of tailings recycling: 1 as cement raw materials, building materials, instead of crushed stone as aggregate, road material or phosphate fertilizer; 2 using hydrometallurgy, beneficiation method or beneficiation-hydrometallurgical joint method The phosphorus-containing components in the tailings are separated;
  • the temperature of the mixed slag after reduction and oxidation is lowered to 1150 to 1250 ° C, and the mixed slag after reduction and oxidation in the middle and upper portions is poured out, and then air-cooled or water-quenched, and used as a cement raw material or a building material;
  • reaction device uses a pourable smelting reaction device or a stationary smelting reaction device, method D is employed:
  • the external slag treatment adopts Method D-1 or Method D-2:
  • Method D-1 When the mass fraction of the vanadium-containing titanium slag TiO 2 after reduction and oxidation is ⁇ 10%, the reduced-oxidized vanadium-containing titanium slag is directly poured out, air-cooled or water-quenched, and used as a cement raw material or Building materials;
  • Method D-2 Pour the vanadium-containing titanium slag after reduction and oxidation into a heat preservation device, perform smelting reduction and oxidation according to the method in Step 2, and separate and recycle Method A, Method B or Method C.
  • the temperature of the titanium-containing blast furnace slag is ⁇ 1300 ° C
  • the temperature of the vanadium-containing titanium molten steel slag is ⁇ 1500 ° C.
  • the titanium-containing blast furnace slag is obtained from the blast furnace slag outlet;
  • the vanadium-containing titanium molten steel slag is obtained from the steel slag slag outlet;
  • the titanium-containing blast furnace slag contains TiO 2 in a mass fraction of 4 to 30%; the vanadium-containing titanium molten steel slag contains TiO 2 in a mass fraction of 0.3 to 6%, and contains V 2 O 5 mass.
  • the score is 0.3 to 5%.
  • the vanadium-containing titanium molten steel slag is a vanadium-containing titanium molten steel slag or an electric furnace containing vanadium-titanium molten oxidized steel slag.
  • the heat preservation device is a pourable heat preservation device or a non-pourable heat preservation device; the non-pourable heat preservation device is a heat preservation pit; and the method for raising the temperature is to add fuel.
  • the pourable holding device is a pourable insulated slag pot; the method of raising the temperature is to add fuel.
  • the pourable smelting reaction device is a pourable converter, a pourable smelting reaction slag or an induction furnace.
  • the fixed smelting reaction device is a reaction device with a slag port or an iron port at the bottom; the fixed reaction device is a plasma furnace, a direct current arc furnace, an alternating current arc furnace, a submerged arc furnace, a blast furnace or a reverberatory furnace.
  • the inner layer of the heat preservation device, the pourable smelting reaction device or the fixed smelting reaction device is a carbon-containing thermal insulation mold release refractory material;
  • the carbon-containing thermal insulation mold release refractory material is a carbon-containing composite refractory material, specifically carbon It is one or several of carbon, graphite, petroleum pitch coke, metallurgical coke, asphalt, anthracite, bituminous coal or lignite.
  • the refractory material is siliceous, semi-silica, clay, high alumina, magnesia, dolomite.
  • the carbon-containing thermal insulation mold release refractory material has two functions: (1) protecting the heat preservation device to improve its life, and (2) allowing the cooled slow cooling slag to be easily removed from the heat preservation device.
  • the fuel and the vanadium-containing titanium molten steel slag are simultaneously added to the titanium-containing mixed slag, the fuel and the vanadium-containing titanium molten steel slag are in an arbitrary ratio.
  • the method for controlling the temperature of the titanium-containing mixed slag in the set temperature range is that the preheating temperature of the fuel is 0 to 1200 ° C, and the temperature of the vanadium-containing titanium molten steel slag is ⁇ 1500 ° C.
  • the fuel is added to the titanium-containing mixed slag by blowing.
  • the blowing method is to insert the slag into the slag by using a refractory lance or to put the fuel into the upper part or the side of the slag.
  • the method for controlling the temperature of the titanium-containing mixed slag in a set temperature range is that the fuel is pulverized coal.
  • the fuel and the vanadium-containing titanium molten steel slag are simultaneously added to the mixed slag, the fuel and the vanadium-containing titanium molten steel slag are in an arbitrary ratio.
  • the vanadium-containing titanium material is titanium-containing blast furnace slag, vanadium-containing titanium steel slag, vanadium-bearing tailings, titanium-selective tailings, low-grade vanadium-titanium magnetic Iron ore, vanadium-titanium magnetite concentrate, vanadium-titanium magnetite direct reduced iron, vanadium-titanium magnetite concentrate metallized pellet, vanadium-titanium magnetite concentrate carbon-containing pre-reduction pellet, vanadium-titanium magnetite concentrate ore, vanadium-titanium One or more of the magnet concentrate pellets; the iron-containing material is ordinary iron concentrate, ordinary iron concentrate direct reduced iron, ordinary iron concentrate sintered ore, ordinary iron concentrate pellet, ordinary iron concentrate Metallized pellets, ordinary iron concentrates containing carbon prereducing pellets, ordinary steel slag, blast furnace gas ash, blast furnace soot
  • the method for controlling the temperature of the titanium-containing mixed slag in a set temperature range, the vanadium-containing titanium material, the iron-containing material and the Fluorine materials are pellets or powdery materials; wherein, the granular material has a particle size of ⁇ 150 ⁇ m, and the powdery material is sprayed into the titanium-containing mixed slag, and the loading gas is air, argon, nitrogen-air mixture. , nitrogen-oxygen gas mixture or air-argon gas mixture.
  • the blowing method is that the slag is inserted into the slag by using a refractory spray gun or placed on the upper part or the side of the slag to blow the powdery material.
  • the method for controlling the temperature of the titanium-containing mixed slag in the set temperature range when the temperature of the titanium-containing mixed slag is > the upper limit of the set temperature, adding the vanadium-containing titanium material, the iron-containing material, the fluorine-containing material or the One or more of titanium blast furnace slag, the purpose is to avoid excessive temperature, protect carbon-containing thermal insulation mold release refractory material, inhibit vanadium-containing pig iron in titanium-containing blast furnace slag, vanadium-containing iron in vanadium-containing titanium molten steel slag and The oxidation of the reduced metal iron increases the recovery rate of the metal iron.
  • the method for controlling the temperature of the titanium-containing mixed slag in the set temperature range adding one or more of the cold vanadium-containing titanium material, the iron-containing material, the fluorine-containing material, and the titanium-containing blast furnace slag
  • the remaining low-priced titanium Ti 2+ , Ti 3+
  • high-priced titanium Ti 4+
  • metallic iron Fe metallic iron
  • the low-valent titanium (Ti 2+ , Ti 3+ ) in the reducing titanium-containing blast furnace slag is oxidized to high-priced titanium during the mixing process of the reducing titanium-containing blast furnace slag and the oxidizing vanadium-containing titanium molten steel slag.
  • Ti 4+ oxidized vanadium-containing titanium molten steel slag
  • Fe 3+ , Fe 2+ is reduced to Fe and Fe 2+ .
  • the oxidizing gas is one of air, oxygen, oxygen-enriched air, nitrogen-oxygen mixed gas, nitrogen-air mixed gas, oxygen-argon mixed gas or air-argon mixed gas.
  • the preheating temperature of the oxidizing gas varies depending on the gas.
  • the oxidizing gas is inserted into the slag by using a refractory lance or placed on the upper side or side of the slag to blow an oxidizing gas.
  • the oxidizing gas injection time and flow rate are determined according to the slag quality, temperature, and degree of reduction oxidation.
  • the reducing agent is one of coal powder, coke powder, bituminous coal or anthracite.
  • step 2 (2) when the reduction property of the titanium-containing mixed slag is insufficient in accordance with (b), the reductant is injected into the slag.
  • the parameter (b) is guaranteed to have sufficient reducing property in the titanium-containing mixed slag, and in actual production, one is judged by the mass percentage of iron oxide in the titanium-containing mixed slag. Whether the reducing property in the titanium-containing mixed slag is sufficient.
  • the remaining low-valent titanium (Ti 2+ , Ti 3+ ) in the titanium-containing mixed slag is sufficiently oxidized to high-priced titanium (Ti 4+ ) to ensure the titanium-containing mixed slag.
  • the remaining high-valent iron (Fe 3+ , Fe 2+ ) is sufficiently reduced to metallic iron Fe to ensure that the metal iron particles in the titanium-containing mixed slag are not oxidized, and the smelting reduction and oxidation + blowing gas process include
  • the vanadium-containing pig iron in the slag of the titanium blast furnace, the vanadium-containing iron in the vanadium-containing titanium molten steel slag and the reduced metal iron realize aggregation, growth and settlement.
  • the cooling method is natural cooling or rotary cooling.
  • the specific operation of the rotary cooling is: the heat preservation device equipped with the mixed slag after the redox is placed on the rotating platform, and rotates according to a certain speed, and the rotation speed depends on the slag quality.
  • the rotation time depends on the slag quality and the slag solidification; the heat preservation device containing the redox mixed slag is placed on the rotating platform for the purpose of accelerating the metal iron and calcium. Aggregation, growth and sedimentation of titanium ore-rich phase, vanadium-rich phase, shorten settlement time, improve sedimentation effect, and improve production efficiency.
  • step 3 in the method A(1), during the cooling process, most of the vanadium-containing metal iron, the titanium-containing group and the vanadium-containing component settle to the bottom due to the difference in density and the mineral size.
  • the upper, middle and lower portions of the slow cooling slag from which the iron slag and the vanadium-containing metal iron layer are removed are separated by gravity separation method to obtain titanium concentrate and vanadium-rich fine.
  • the titanium and calcium components in the mixed slag after reduction and oxidation continue to migrate and enrich in the perovskite phase, and realize growth and sedimentation;
  • the vanadium components in the slag continue to migrate, enrich in the metal iron phase and vanadium-rich oxide phase, and achieve growth and sedimentation;
  • the phosphorus component in the mixed slag after reduction oxidation continues to migrate and is enriched in Ca 2 SiO 4 -Ca 3 (PO 4 ) 2 phase, distributed at the phase interface between the two phases of perovskite and other mineral phases; iron oxide, free calcium oxide and free magnesium oxide disappeared in the mixed slag after redox, slag Realize tempering.
  • the gravity sorting method is a shaker sorting, a chute sorting or a combination of the two.
  • the hydrometallurgy is a dilute acid leaching method, wherein the dilute acid leaching method is one of inorganic acid leaching and organic acid leaching.
  • the inorganic acid is selected from one or more of sulfuric acid, hydrochloric acid and phosphoric acid
  • the organic acid is one or more selected from the group consisting of oxalic acid, acetic acid and citric acid.
  • the metal iron recovery rate is 90-97%, and the mass fraction of the TiO 2 in the titanium concentrate having the main phase is perovskite is 35 to 52%, and the recovery of the titanium is performed.
  • the ratio is 60-80%; in the method B, the metal iron recovery rate is 90-95%, and the mass fraction of the TiO 2 in the titanium concentrate with the main phase is perovskite is 35-52%, titanium The recovery rate is 58 to 76%.
  • the method for smelting reduction and recovery and quenching and tempering treatment of the titanium-containing mixed slag, the quenching and tempering process is continued from the mixing of the raw materials until the separation and recovery process, the free calcium oxide and the free magnesium oxide in the slag disappear, and the iron oxide is oxidized. The metal and metal iron disappear or almost disappear, and the slag is tempered.
  • the method for recovering and quenching and tempering the titanium-containing mixed slag of the invention has high recovery rate of metal iron, which is a gas containing titanium mixed slag, which not only contains vanadium-containing pig iron in the slag containing titanium blast furnace and molten steel slag containing vanadium and titanium
  • metal iron which is a gas containing titanium mixed slag, which not only contains vanadium-containing pig iron in the slag containing titanium blast furnace and molten steel slag containing vanadium and titanium
  • the vanadium iron aggregates, grows and settles, and the iron oxides (FeO, Fe 2 O 3 ) in the molten mixed slag are sufficiently reduced to metal iron to achieve aggregation, growth and sedimentation.
  • the method for smelting reduction recovery and quenching and tempering treatment of the titanium-containing mixed slag of the present invention increases the mineral grindability.
  • the phase interface between the two phases of the perovskite and other mineral phases is beneficial to the mineral dissociation of the perovskite phase, which is favorable for beneficiation Separate
  • the invention fully utilizes the physical heat resources of the titanium-containing blast furnace slag and the vanadium-containing titanium molten steel slag, the thermal metallurgical flux in the slag, and the reduction and oxidation of the titanium-containing blast furnace slag and the vanadium-containing titanium molten steel slag.
  • the molten slag is mixed with an oxidizing gas to achieve smelting reduction and oxidation, controlling the oxygen potential, and the iron oxide is sufficiently reduced to metallic iron, and the titanium component in the slag is sufficiently oxidized; it is a new method of smelting reduction;
  • the titanium and calcium components in the mixed slag migrate and enrich in the perovskite phase, and grow and settle, the elemental vanadium component migrates and is concentrated in the metallic iron phase, and the low-valent vanadium oxide Enriched in the vanadium-rich oxide phase, and achieve growth and sedimentation, phosphorus component migration, enrichment in the Ca 2 SiO 4 -Ca 3 (PO 4 ) 2 phase, occurring at the interface of the perovskite phase;
  • the slow cooling slag is separated from the settled iron ingot to recover the vanadium-containing metal iron, and the vanadium-containing metal iron remaining at the bottom of the slag is magnetically separated to realize the pig iron and vanadium-containing titanium in the titanium-containing blast furnace slag.
  • the phosphorus-rich phase at the interface of the perovskite phase contributes to the dissociation and beneficiation of the perovskite phase;
  • the process of the invention can be carried out continuously or discontinuously to meet the needs of industrial production.
  • the inner layer of the reaction device of the present invention uses a carbon-containing thermal insulation mold release refractory material, which not only protects the heat preservation device, but also facilitates the removal of the cooled slow cooling slag from the heat preservation device;
  • the raw material of the present invention is a liquid molten titanium-containing blast furnace slag ( ⁇ 1300 ° C) and a vanadium-containing titanium molten steel slag ( ⁇ 1500 ° C) flowing out of the slag outlet, and contains abundant heat energy resources, and has high temperature and high heat.
  • the characteristics make full use of the slag physical heat resources and save energy efficiently; the liquid molten titanium-containing blast furnace slag and the vanadium-containing titanium molten steel slag contain a large amount of hot metallurgical flux, which are slag systems with excellent physical and chemical properties, realizing metallurgical resources.
  • liquid molten titanium-containing blast furnace slag is reducing slag
  • vanadium-containing titanium molten steel slag is oxidative slag, which fully utilizes the characteristics of high responsive chemical activity of the two kinds of slag
  • the present invention realizes smelting reduction and oxidation by mixing two kinds of slag, spraying oxidizing gas, controlling oxygen potential, and not only collecting iron in the slag containing titanium blast furnace and vanadium-containing iron in the molten steel slag containing vanadium and titanium, Growing up and sedimentation, and fully reducing iron oxides (FeO, Fe 2 O 3 ) in the titanium-containing molten steel slag into metallic iron to achieve aggregation, growth and sedimentation;
  • adding cold material and hot-melting titanium-containing blast furnace slag avoids excessive slag temperature, protects carbon-containing thermal insulation mold release refractory material, improves the life of the heat preservation device, and suppresses pig iron in the titanium-containing blast furnace slag.
  • the two kinds of slag mixing of the invention realizes smelting reduction and oxidation, spraying oxidizing gas, controlling oxygen potential, oxidizing low-priced titanium into high-priced titanium, and migrating titanium and calcium components in mixed slag and enriching in calcium Titanium ore phase, and realize growth and sedimentation; vanadium oxide is fully reduced to elemental vanadium and low-valent vanadium, migrated and enriched in metal iron phase and vanadium-rich oxide phase, and grows up and settles, not only achieves melting Recovery of elemental vanadium in the slag, and enrichment, growth and sedimentation of vanadium oxide in the slag;
  • the iron component, the titanium component, the vanadium component and the phosphorus component in the slag are separately transported and concentrated in the vanadium-containing metal iron, the titanium-rich phase, the vanadium-rich phase, and the phosphorus-rich phase.
  • the heat preservation device equipped with slag is rotated on the rotating platform to accelerate the accumulation, growth and settlement of the vanadium-containing metal iron, titanium-rich phase, vanadium-rich phase and phosphorus-rich phase, and shorten Settling time, improve sedimentation effect, improve production efficiency;
  • the addition of fluorine-containing materials accelerates the aggregation, growth and settlement of vanadium-containing metal iron, titanium-rich phase, vanadium-rich phase and phosphorus-rich phase, shortens settlement time and improves sedimentation effect;
  • the phosphorus component in the mixed slag of the method of the present invention migrates and is concentrated in the Ca 2 SiO 4 -Ca 3 (PO 4 ) 2 phase, and is distributed in the phase interface between the two phases of the perovskite and other mineral phases, Conducive to beneficiation separation; free calcium oxide and free magnesium oxide disappear, metal iron and iron oxide almost disappear, free calcium oxide and magnesium oxide disappeared in the slag, mineral grindability increased, slag to achieve quenching and tempering;
  • the method of the invention adopts a method of manual sorting, magnetic separation and reselection, separating vanadium-containing metal iron, vanadium-rich oxide phase and perovskite phase deposited at the bottom to realize titanium component in the mixed slag, High-efficiency recovery of iron component, vanadium component, phosphorus component and free calcium oxide component; since titanium-rich phase, vanadium-containing metal iron and vanadium-rich phase settle at the bottom, the amount of slag to be sorted is small, and the mineral can be ground.
  • tailings recycling 1 as cement raw materials, building materials, instead of crushed stone as aggregate, road material or phosphate fertilizer; 2 using hydrometallurgy, beneficiation method or beneficiation-hydrometallurgical combination method Separation of phosphorus-containing components ; tailings use value is large, a wide range of applications;
  • the invention fully utilizes the slag physical heat resource, the oxidative and reducing properties of the hot metallurgical flux and the slag in the slag, realizes the smelting reduction and oxidation, the iron component, the titanium component and the vanadium group in the slag
  • the phosphorus component is separately migrated and enriched in the Vanadium metal iron, titanium-rich phase, vanadium-rich phase, phosphorus-rich phase, and achieve aggregation, growth and sedimentation, to achieve titanium, iron, vanadium, phosphorus and free calcium oxide in mixed slag
  • High-efficiency recycling and can process cold vanadium, titanium and iron materials, and realize slag quenching and tempering treatment to achieve efficient and comprehensive utilization of secondary resources.
  • the method has the advantages of short reaction time, high metal recovery rate, low production cost, strong adaptability of raw materials, large processing capacity, environmental friendliness and high economic benefit, and can effectively solve the problem of efficient recycling of metallurgical resources and thermal energy.
  • FIG. 1 is a process flow diagram of a method for smelting reduction recovery and quenching and tempering treatment of a titanium-containing mixed slag according to an embodiment of the present invention.
  • the solid-liquid ratio referred to in the following examples refers to the mass ratio of tailings to the leachate in units of g:L.
  • a method for smelting reduction recovery and quenching and tempering treatment of titanium-containing mixed slag specifically comprising the following steps:
  • Step 1 slag mixing:
  • the 410kg liquid molten titanium-containing blast furnace slag and 40kg converter vanadium-containing titanium molten steel slag flowing out of the slag outlet are poured into a pourable insulating slag tank with graphite-dolomite composite thermal insulation mold release refractory material, and fully mixed to form titanium-containing slag Mixing slag, smelting reduction reaction occurs;
  • the slag temperature is 1394 ° C, which is lower than the set temperature of 1400-1600 ° C in the titanium-containing mixed slag; the refractory spray gun is inserted into the mixed slag and blown into the coal powder 2 kg, so that the temperature of the mixed slag is raised to 1426 °C;
  • the vanadium-containing titanium molten steel slag contains components and mass percentages thereof: 3.26 wt% V 2 O 5 , TFe 20.68 wt%, 40.89 wt% CaO, 12.36 wt% SiO 2 , 3.62 wt% TiO 2 , 2.47 wt% MgO, 1.22 wt. %MnO, 1.64wt% Al 2 O 3 , the balance is other impurities;
  • Injecting gas In the titanium-containing mixed slag, oxygen is pre-heated and a total of 18 minutes of oxygen is sprayed; wherein the preheating temperature of oxygen is 30 ° C, and the relationship between oxygen time and flow rate is 1 L/(min). ⁇ kg); the mode of oxygen injection is to insert oxygen into the titanium-containing mixed slag by using a refractory spray gun.
  • the temperature of the titanium-containing mixed slag is between 1400 and 1600 ° C;
  • the remaining low-valent titanium is oxidized to high-priced titanium, and the remaining iron oxide is reduced to metallic iron;
  • the reduction and oxidation process measured the mixed slag temperature of 1456 ⁇ 1466 ° C, within the set range;
  • the remaining low-cost titanium is oxidized to high-priced titanium, and the remaining iron oxide is reduced to metallic iron;
  • vanadium-containing metal iron is settled to the bottom of the reaction device to form iron shovel, and the iron shovel is manually taken out; the vanadium-containing metal iron layer in the remaining slow slag is crushed to a particle size of 20-400 ⁇ m, ground and magnetically separated.
  • the remaining vanadium-containing metal iron; the metal iron recovery rate is 92%, and the total iron in the tailings slag in this step is 0.792% by weight;
  • the lower slow cooling slag of the slow cooling slag from the iron slag and the vanadium containing metal iron layer is selected by the chute once, the shaker is selected once, the two sweeps are selected, and the upper and middle passes through the chute are coarsely selected and shaken.
  • the bed is selected once, once sweeped, and the titanium-containing component is separated from the gangue to obtain a titanium concentrate with a main phase of perovskite phase, a vanadium-containing magnesium-aluminum spinel medium ore and tailings, and a titanium concentrate.
  • the mass fraction of medium TiO 2 is 48.41%
  • the mass fraction of V 2 O 5 in the vanadium-containing magnesium-aluminum spinel is 8.71%
  • the mass fraction of P 2 O 5 in the phosphorus-rich phase is 28%.
  • tailings are separated by 2% dilute sulfuric acid at a solid-liquid ratio of 1:2, and the phosphorus recovery rate is 80%.
  • a method for recovering and quenching and tempering a titanium-containing mixed slag comprises the following steps:
  • Step 1 slag mixing:
  • the liquid molten 100kg titanium-containing blast furnace slag and the 1000kg converter vanadium-containing titanium molten steel slag which are discharged from the slag outlet are poured into the thermal insulation pit with the carbon-magnesium composite thermal insulation mold release refractory material, and fully mixed to form the titanium-containing mixed slag.
  • the smelting reduction reaction occurs; the slag temperature after mixing is 1570 ° C, and the temperature of the titanium-containing mixed slag is set in the range of 1400 to 1600 ° C;
  • Vanadium-containing titanium molten steel slag containing components and mass percentage thereof 2.29 wt% V 2 O 5 , TFe 18.79 wt%, 41.64 wt% CaO, 11.36 wt% SiO 2 , 3.92 wt% TiO 2 , 3.54 wt% MgO, 1.43 wt% MnO, 1.37wt% Al 2 O 3 , the balance is other impurities;
  • (1) Injecting gas The preheated air is sprayed into the titanium-containing mixed slag for a total of 5 minutes; wherein the preheating temperature of the air is 900 ° C, and the relationship between the air time and the flow rate is 105 L / (min). ⁇ kg); the air is sprayed by means of a refractory spray gun placed in the upper part of the mixed slag;
  • the temperature of the titanium-containing mixed slag is in the range of a set temperature of 1400 to 1600 ° C;
  • the remaining low-valent titanium is oxidized to high-priced titanium, and the remaining iron oxide is reduced to metallic iron;
  • the redox process measured the temperature of the mixed slag as high as 1620 ° C; because the temperature is higher than the set value, adding 2 kg of titanium-containing blast furnace slag at normal temperature to the titanium-containing mixed slag, 1 kg of ordinary iron concentrate carbon-containing pre-reduction pellets and 2kg of vanadium-titanium steel slag, the temperature of the titanium-containing mixed slag is reduced to 1550 ⁇ 1560 ° C, within the set range;
  • the reducing property in the titanium-containing mixed slag is insufficient, and 3 kg of coke powder is added to the titanium-containing mixed slag, so that the remaining low-valent titanium is oxidized into high-priced titanium in the titanium-containing mixed slag, and the remaining iron oxide is reduced.
  • Metal iron
  • the reduced oxidized mixed slag is rotated and cooled to room temperature to obtain slow cooling slag; wherein, the specific operation of the rotary cooling is: the heat preservation device containing the mixed slag after redox is placed on the rotating platform, according to Rotation at a certain speed, the rotation speed depends on the quality of the slag and the height or depth of the insulation device, and the rotation time depends on the quality of the slag and the solidification of the slag;
  • vanadium-containing metal iron is settled to the bottom of the reaction device to form iron shovel, and the iron shovel is manually taken out; the vanadium-containing metal iron layer in the remaining slow slag is crushed to a particle size of 20-400 ⁇ m, ground and magnetically separated.
  • the remaining vanadium-containing metal iron; the metal iron recovery rate is 93%, and the total iron in the tailings slag is 0.463wt%;
  • Tailings are used as phosphate fertilizer.
  • a method for recovering and quenching and tempering a titanium-containing mixed slag comprises the following steps:
  • Step 1 slag mixing:
  • the liquid molten 400kg titanium-containing blast furnace slag and 45kg converter vanadium-containing titanium molten steel slag flowing out of the slag outlet are poured into the inner layer of the thermal insulation pit with metallurgical coke-high alumina composite thermal insulation mold release refractory material, fully mixed to form titanium-containing mixed melting Slag, smelting reduction reaction; slag temperature after mixing is 1420 ° C; temperature control range of titanium-containing mixed slag is 1400 ⁇ 1600 ° C;
  • Vanadium-containing titanium molten steel slag containing components and mass percentage thereof 1.79 wt% V 2 O 5 , TFe 18.76 wt%, 43.84 wt% CaO, 12.92 wt% SiO 2 , 3.94 wt% TiO 2 , 3.78 wt% MgO, 1.21 wt %MnO, 1.26wt% Al 2 O 3 , the balance is other impurities;
  • Injecting gas In the titanium-containing mixed slag, the preheated oxygen is sprayed and a total of 5 minutes of oxygen is sprayed; wherein the preheating temperature of oxygen is 1200 ° C, and the relationship between oxygen time and flow rate is 40 L/(min). ⁇ kg); the oxygen is sprayed by means of a refractory spray gun placed on the side of the mixed slag.
  • the temperature of the titanium-containing mixed slag is set within 1400 to 1600 ° C;
  • the remaining low-valent titanium is oxidized to high-priced titanium, and the remaining iron oxide is reduced to metallic iron;
  • measuring the mixed slag temperature is 1462 ⁇ 1467 ° C, within the set temperature range;
  • vanadium-containing metal iron is settled to the bottom of the reaction device to form iron shovel, and the iron shovel is manually taken out; the vanadium-containing metal iron layer in the remaining slow slag is crushed to a particle size of 20-400 ⁇ m, ground and magnetically separated. Remaining vanadium-containing metal iron; metal iron recovery rate of 91%, total iron in the tailings slag of this step is 0.872wt%;
  • the mass fraction of TiO 2 in the titanium concentrate is 44.27%, and the mass fraction of V 2 O 5 in the vanadium-bearing magnesia-alumina spinel is 8.89%.
  • the mass fraction of P 2 O 5 is 28%;
  • Tailings are used as phosphate fertilizer.
  • a method for recovering and quenching and tempering a titanium-containing mixed slag comprises the following steps:
  • Step 1 slag mixing:
  • the liquid molten 400kg titanium-containing blast furnace slag and 65kg converter vanadium-containing titanium molten steel slag flowing out of the slag outlet are poured into a pourable insulating slag tank with an asphalt-semi-silica composite thermal insulation mold release refractory material, and fully mixed to form titanium-containing slag
  • the molten slag is mixed to cause a smelting reduction reaction; the slag temperature after mixing is 1440 ° C; and the temperature of the titanium-containing mixed slag is set in the range of 1400 to 1600 ° C; wherein:
  • Vanadium-containing titanium molten steel slag containing components and mass percentage 3.12 wt% V 2 O 5 , TFe 20.51 wt%, 41.19 wt% CaO, 9.34 wt% SiO 2 , 5.79 wt% TiO 2 , 1.24 wt% MgO, 2.31 wt% MnO, 1.30wt% Al 2 O 3 , the balance is other impurities;
  • Injecting gas The preheated air is sprayed into the titanium-containing mixed slag for a total of 4 minutes; wherein the air preheating temperature is 1000 ° C, and the relationship between the air time and the flow rate is 87 L/(min ⁇ Kg); the air is blown by inserting a mixed slag into the refractory spray gun;
  • the temperature of the titanium-containing mixed slag is in the range of a set temperature of 1400 to 1600 ° C;
  • the remaining low-valent titanium is oxidized to high-priced titanium, and the remaining iron oxide is reduced to metallic iron;
  • measuring the mixed slag temperature is 1500 ⁇ 1510 ° C, in the set temperature range;
  • vanadium-containing metal iron is settled to the bottom of the reaction device to form iron shovel, and the iron shovel is manually taken out; the vanadium-containing metal iron layer in the remaining slow slag is crushed to a particle size of 20-400 ⁇ m, ground and magnetically separated.
  • the remaining vanadium-containing metal iron; the metal iron recovery rate is 93%, and the total iron content in the tailings slag in this step is 0.502wt%;
  • the mass fraction of TiO 2 in the titanium concentrate is 49.31%, and the mass fraction of V 2 O 5 in the vanadium-containing magnesium-aluminum spinel is 8.98%, and the P 2 in the phosphorus-rich phase
  • the mass fraction of O 5 is 27%, re-separation separation, and the phosphorus recovery rate is 60%;
  • Tailings are used as building materials.
  • a method for recovering and quenching and tempering a titanium-containing mixed slag comprises the following steps:
  • Step 1 slag mixing:
  • the liquid molten 400kg titanium-containing blast furnace slag and 80kg converter vanadium-containing titanium molten steel slag flowing out of the slag outlet are poured into the pourable thermal insulation slag tank with the bituminous coal-spinel composite thermal insulation mold release refractory material, and fully mixed to form
  • the titanium mixed slag is subjected to a smelting reduction reaction; the slag temperature after mixing is 1450 ° C; and the temperature of the titanium-containing mixed slag is set in the range of 1400 to 1600 ° C; wherein:
  • Vanadium-containing titanium molten steel slag containing components and mass percentage thereof 0.62 wt% V 2 O 5 , TFe 18.74 wt%, 41.32 wt% CaO, 12.74 wt% SiO 2 , 4.78 wt% TiO 2 , 3.14 wt% MgO, 1.29 wt %MnO, 1.87wt% Al 2 O 3 , the balance is other impurities;
  • Injecting gas The preheated air is sprayed into the titanium-containing mixed slag for a total of 4 minutes; wherein the air preheating temperature is 0 ° C, and the relationship between the air time and the flow rate is 23 L/(min ⁇ Kg); the air is blown by inserting a mixed slag into the refractory spray gun;
  • the temperature of the titanium-containing mixed slag is in the range of a set temperature of 1400 to 1600 ° C;
  • the remaining low-valent titanium is oxidized to high-priced titanium, and the remaining iron oxide is reduced to metallic iron;
  • the measured mixed slag temperature is 1468 ⁇ 1476 ° C, within the set range;
  • vanadium-containing metal iron is settled to the bottom of the reaction device to form iron shovel, and the iron shovel is manually taken out; the vanadium-containing metal iron layer in the remaining slow slag is crushed to a particle size of 20-400 ⁇ m, ground and magnetically separated.
  • the remaining vanadium-containing metal iron; the metal iron recovery rate is 91%, and the total iron content in the slag is 0.519wt%;
  • the titanium-containing component is separated from the gangue to obtain a titanium concentrate with a main phase of perovskite phase, including In the vanadium-magnesium-aluminum spinel mine and tailings, the mass fraction of TiO 2 in the titanium concentrate is 42.87%, and the mass fraction of V 2 O 5 in the vanadium-bearing magnesium-aluminum spinel is 8.71%. The mass fraction of P 2 O 5 is 28%;
  • tailings are separated by 2% dilute sulfuric acid, and the phosphorus pentoxide is separated by a solid-liquid ratio of 1:2, and the phosphorus recovery rate is 75%.
  • a method for recovering and quenching and tempering a titanium-containing mixed slag comprises the following steps:
  • Step 1 slag mixing:
  • the liquid molten 400kg titanium-containing blast furnace slag and 50kg electric furnace vanadium-containing titanium molten oxidized steel slag flowing out of the slag outlet are poured into the thermal insulation pit with carbon-clay composite thermal insulation mold release refractory material, and fully mixed to form titanium-containing mixed slag.
  • Smelting reduction Reaction; the slag temperature after mixing is 1430 ° C; the temperature of the titanium-containing mixed slag is set in the range of 1400 ⁇ 1600 ° C;
  • Vanadium-containing titanium molten steel slag containing components and mass percentage thereof 2.32 wt% V 2 O 5 , TFe 18.76 wt%, 42.25 wt% CaO, 11.96 wt% SiO 2 , 4.89 wt% TiO 2 , 3.26 wt% MgO, 1.45 wt %MnO, 1.69wt% Al 2 O 3 , the balance is other impurities;
  • Injecting gas In the titanium-containing mixed slag, the preheated oxygen is sprayed and a total of 7 minutes of oxygen is sprayed; wherein the oxygen preheating temperature is 900 ° C, and the relationship between the oxygen time and the flow rate is 9 L/(min ⁇ Kg); the oxygen is injected by means of a refractory spray gun inserted into the mixed slag;
  • the temperature of the titanium-containing mixed slag is in the range of a set temperature of 1400 to 1600 ° C;
  • the remaining low-valent titanium is oxidized to high-priced titanium, and the remaining iron oxide is reduced to metallic iron;
  • the mixed slag temperature is 1483 ⁇ 1491 ° C, within the set range;
  • vanadium-containing metal iron is settled to the bottom of the reaction device to form iron shovel, and the iron shovel is manually taken out; the vanadium-containing metal iron layer in the remaining slow slag is crushed to a particle size of 20-400 ⁇ m, ground and magnetically separated.
  • the remaining vanadium-containing metal iron; the metal iron recovery rate is 92%, and the total iron content in the tailings slag in this step is 0.741wt%;
  • the lower slow cooling slag is once coarsely selected, the shaker is selected once, and the sweeping is performed twice.
  • the upper and middle sections are firstly selected by a chute, the shaker is selected once, and the sweeping is performed once, and the titanium-containing component is separated from the gangue to obtain a titanium concentrate having a main phase of a perovskite phase, a vanadium-containing magnesium-aluminum tip.
  • the mass fraction of TiO 2 in the titanium concentrate is 36.39%, and the mass fraction of V 2 O 5 in the vanadium-containing magnesium-aluminum spinel is 8.07%, and the P 2 O 5 in the phosphorus-rich phase.
  • the quality score is 26%;
  • Tailings are used as phosphate fertilizer.
  • a method for recovering and quenching and tempering a titanium-containing mixed slag comprises the following steps:
  • Step 1 slag mixing:
  • the liquid molten 40kg titanium-containing blast furnace slag and 400kg electric furnace vanadium-containing titanium fused oxide steel slag flowing out of the slag outlet are poured into the inner layer.
  • slag temperature after mixing is 1580 ° C;
  • temperature is set at 1400 of titanium-containing mixed slag ⁇ 1600°C; among them;
  • Vanadium-containing titanium molten steel slag containing components and mass percentage thereof 1.34 wt% V 2 O 5 , TFe 18.72 wt%, 41.19 wt% CaO, 12.37 wt% SiO 2 , 4.96 wt% TiO 2 , 3.19 wt% MgO, 1.89 wt %MnO, 1.29wt% Al 2 O 3 , the balance is other impurities;
  • Injecting gas In the titanium-containing mixed slag, oxygen is pre-heated and a total of 14 minutes of oxygen is sprayed; wherein the oxygen preheating temperature is 180 ° C, and the relationship between oxygen time and flow rate is 1.8 L/(min). ⁇ kg); the way of blowing oxygen is to insert a mixed slag into the refractory spray gun;
  • the temperature of the titanium-containing mixed slag is within the set temperature of 1400 to 1600 ° C
  • the remaining low-valent titanium is oxidized to high-priced titanium, and the remaining iron oxide is reduced to metallic iron;
  • the reduction oxidation process measured the mixed slag temperature as high as 1618 ° C, because the temperature is higher than the set value, adding 2 kg of vanadium-containing titanium steel slag to the titanium-containing mixed slag, so that the temperature of the titanium-containing mixed slag is 1520 ⁇ 1525 ° C, in the set temperature range;
  • vanadium-containing metal iron is settled to the bottom of the reaction device to form iron shovel, and the iron shovel is manually taken out; the vanadium-containing metal iron layer in the remaining slow slag is crushed to a particle size of 20-400 ⁇ m, ground and magnetically separated.
  • the remaining vanadium-containing metal iron; the metal iron recovery rate is 93%, and the total iron content in the tailings slag in this step is 0.879wt%;
  • Tailings are used as phosphate fertilizer.
  • a method for recovering and quenching and tempering a titanium-containing mixed slag comprises the following steps:
  • Step 1 slag mixing:
  • the liquid molten 200kg titanium-containing blast furnace slag and the 200kg electric furnace vanadium-containing titanium molten oxidized steel slag which are discharged from the slag outlet are poured into the thermal insulation pit of the carbon-olivine composite thermal insulation mold release refractory material, and fully mixed to form mixed slag.
  • a smelting reduction reaction occurs; the slag temperature after mixing is 1440 ° C; and the temperature of the titanium-containing mixed slag is set in the range of 1400 to 1600 ° C;
  • Vanadium-containing titanium molten steel slag containing components and mass percentage thereof 0.39 wt% V 2 O 5 , TFe 18.72 wt%, 42.26 wt% CaO, 12.17 wt% SiO 2 , 4.96 wt% TiO 2 , 3.15 wt% MgO, 1.57 wt %MnO, 1.91wt% Al 2 O 3 , the balance is other impurities;
  • Injecting gas In the titanium-containing mixed slag, the preheated oxygen is sprayed and the oxygen is sprayed for 2 minutes; wherein the oxygen preheating temperature is 1050 ° C, and the relationship between the oxygen time and the flow rate is 20 L/(min ⁇ Kg); the oxygen is injected by means of a refractory spray gun inserted into the mixed slag;
  • the temperature of the titanium-containing mixed slag is in the range of a set temperature of 1400 to 1600 ° C;
  • the remaining low-valent titanium is oxidized to high-priced titanium, and the remaining iron oxide is reduced to metallic iron;
  • the mixed slag temperature measured during the reduction process is 1470 ⁇ 1480 ° C, within the set range;
  • vanadium-containing metal iron is settled to the bottom of the reaction device to form iron shovel, and the iron shovel is manually taken out; the vanadium-containing metal iron layer in the remaining slow slag is crushed to a particle size of 20-400 ⁇ m, ground and magnetically separated.
  • the remaining vanadium-containing metal iron; the metal iron recovery rate is 92%, and the total iron content in the tailings slag in this step is 0.879wt%;
  • the lower slow-cooling slag is coarsely selected through the chute, and the shaker is selected once, which will contain
  • the titanium component is separated from the gangue to obtain a titanium concentrate with a main phase of perovskite phase, a mineral containing vanadium-magnesium-aluminum spinel and a tailings.
  • the mass fraction of TiO 2 in the titanium concentrate is 32.19%, including
  • the mass fraction of V 2 O 5 in the vanadium-magnesium-aluminum spinel is 8.20%, and the mass fraction of P 2 O 5 in the phosphorus-rich phase is 27%;
  • Tailings are used as phosphate fertilizer.
  • a method for recovering and quenching and tempering a titanium-containing mixed slag comprises the following steps:
  • Step 1 slag mixing:
  • the liquid molten 100kg titanium-containing blast furnace slag and the 500kg electric furnace vanadium-containing titanium molten oxidized steel slag which are discharged from the slag outlet are poured into the thermal insulation pit of the graphite-vanadium-containing titanium steel slag composite thermal insulation mold release refractory material, and fully mixed to form mixed slag.
  • a smelting reduction reaction occurs; the slag temperature after mixing is 1470 ° C; and the temperature of the titanium-containing mixed slag is set in the range of 1400 to 1600 ° C;
  • Vanadium-containing titanium molten steel slag containing components and mass percentage thereof 2.14 wt% V 2 O 5 , TFe 16.71 wt%, 43.26 wt% CaO, 12.38 wt% SiO 2 , 0.53 wt% TiO 2 , 2.96 wt% MgO, 1.85 wt %MnO, 1.79wt% Al 2 O 3 , the balance is other impurities;
  • Injecting gas In the titanium-containing mixed slag, oxygen is pre-heated and a total of 4 minutes of oxygen is sprayed; wherein the oxygen preheating temperature is 280 ° C, and the relationship between oxygen time and flow rate is 10 L/(min ⁇ Kg); the oxygen is injected by means of a refractory spray gun inserted into the mixed slag;
  • the temperature of the titanium-containing mixed slag is in the range of a set temperature of 1400 to 1600 ° C;
  • the remaining low-valent titanium is oxidized to high-priced titanium, and the remaining iron oxide is reduced to metallic iron;
  • the mixed slag temperature is 1520 ⁇ 1530 ° C, within the set temperature range;
  • a method for recovering and quenching and tempering a titanium-containing mixed slag comprises the following steps:
  • Step 1 slag mixing:
  • the liquid molten 400kg titanium-containing blast furnace slag and the 360kg electric furnace vanadium-containing titanium molten oxidized steel slag flowing out of the slag outlet are poured into the pourable slag pot with the petroleum pitch-titanium blast furnace slag composite thermal insulation mold release refractory material, and fully mixed.
  • Vanadium-containing titanium molten steel slag containing components and mass percentage thereof 2.24 wt% V 2 O 5 , TFe 16.94 wt%, 42.86 wt% CaO, 11.29 wt% SiO 2 , 4.86 wt% TiO 2 , 2.98 wt% MgO, 1.94 wt %MnO, 1.78wt% Al 2 O 3 , the balance is other impurities;
  • Injecting gas In the titanium-containing mixed slag, the preheated oxygen is sprayed and a total of 7 minutes of oxygen is sprayed; wherein the oxygen preheating temperature is 300 ° C, and the relationship between the oxygen time and the flow rate is 50 L/(min ⁇ Kg); the oxygen is injected by means of a refractory spray gun inserted into the mixed slag;
  • the temperature of the titanium-containing mixed slag is in the range of a set temperature of 1400 to 1600 ° C;
  • the remaining low-valent titanium is oxidized to high-priced titanium, and the remaining iron oxide is reduced to metallic iron;
  • the reduction oxidation process measures the mixed slag temperature of 1470 ⁇ 1478 ° C, within the set range;
  • vanadium-containing metal iron is settled to the bottom of the reaction device to form iron shovel, and the iron shovel is manually taken out; the vanadium-containing metal iron layer in the remaining slow slag is crushed to a particle size of 20-400 ⁇ m, ground and magnetically separated.
  • the remaining vanadium-containing metal iron; the metal iron recovery rate is 92%, and the total iron content in the tailings slag in this step is 0.778 wt%;
  • a titanium concentrate with a main phase of perovskite phase, a vanadium-bearing magnesium-aluminum spinel ore and tailings, and the mass fraction of TiO 2 in the titanium concentrate is 38.28%, the mass fraction of V 2 O 5 in the vanadium-bearing magnesium-aluminum spinel is 8.51%, and the mass fraction of P 2 O 5 in the phosphorus-rich phase is 27%;
  • tailings were separated by 2% hydrochloric acid, and the phosphorus pentoxide was separated by a solid-liquid ratio of 1:2, and the phosphorus recovery rate was 70%.
  • a method for recovering and quenching and tempering a titanium-containing mixed slag comprises the following steps:
  • Step 1 slag mixing:
  • the liquid molten 40kg titanium-containing blast furnace slag flowing out from the slag outlet and the 400kg electric furnace vanadium-containing titanium molten oxidized steel slag are poured into the pourable smelting reaction slag tank with metallurgical coke-spinel composite thermal insulation release refractory material, fully Mixing to form a titanium-containing mixed slag, and a smelting reduction reaction occurs; after mixing, the slag temperature is 1610 ° C;
  • Vanadium-containing titanium molten steel slag containing components and mass percentage thereof 0.3 wt% V 2 O 5 , TFe 16.94 wt%, 45.32 wt% CaO, 10.36 wt% SiO 2 , 3.54 wt% TiO 2 , 2.67 wt% MgO, 1.85 wt %MnO, 1.64wt% Al 2 O 3 , the balance is other impurities;
  • Injecting gas In the titanium-containing mixed slag, preheating oxygen-enriched air is sprayed, and oxygen-enriched air is sprayed for 5 minutes; wherein the volume percentage of oxygen in the oxygen-enriched air is 22%, and the oxygen-enriched air is pre-charged.
  • the heat temperature is 1200 ° C
  • the relationship between the time of oxygen-enriched air and the flow rate is 60 L / (min ⁇ kg)
  • the method of blowing oxygen-enriched air is to insert the refractory spray gun into the side of the slag;
  • the temperature of the titanium-containing mixed slag is in the range of the set temperature of 1450 to 1600 ° C;
  • the remaining low-valent titanium is oxidized to high-priced titanium, and the remaining iron oxide is reduced to metallic iron;
  • the redox process measures the mixed slag temperature up to 1655 ° C; because the temperature is higher than the set value, 3 kg of vanadium-titanium magnetite concentrate metallized pellets are blown into the titanium-containing mixed slag to make the titanium-containing mixture The temperature of the slag is lowered to 1560 ⁇ 1570 ° C, within the set range;
  • the temperature of the mixed slag after reduction and oxidation is lowered to 1250 ° C, and the mixed slag after reduction and oxidation in the middle and upper portions is water quenched and used as a cement raw material or a building material;
  • the lower reduced oxidized mixed slag is spin-cooled to room temperature to obtain slow cooling slag;
  • the rotary cooling operation is: the heat preservation device containing the mixed slag after redox is placed on the rotating platform at a certain speed Rotation, the rotation speed depends on the quality of the slag and the height or depth of the insulation device, and the rotation time depends on the quality of the slag and the solidification of the slag;
  • the vanadium-containing metal iron is settled to the bottom of the reaction device to form iron shovel, and the iron shovel is manually taken out; the vanadium-containing metal iron layer in the remaining slow slag is crushed to a particle size of 20-400 ⁇ m, and the remaining vanadium is separated by magnetic separation.
  • the upper, middle and lower parts of the slow-cooling slag for removing iron slag and vanadium-containing metal iron layer are separated by gravity separation method; the lower slow cooling slag is coarsely selected through the chute, the shaker is selected once, and the sweeping is performed twice.
  • the titanium-containing component is separated from the gangue to obtain a titanium concentrate with a main phase of perovskite phase, a vanadium-bearing magnesium-aluminum spinel ore and tailings, and the mass fraction of TiO 2 in the titanium concentrate is 35.00%.
  • the mass fraction of V 2 O 5 in the vanadium-containing magnesium-aluminum spinel is 9.21%; the mass fraction of P 2 O 5 in the phosphorus-rich phase is 26%;
  • the tailings were separated by 2% hydrochloric acid, and the ratio of solid to liquid was 1:2, and the phosphorus recovery was 60%.
  • a method for recovering and quenching and tempering a titanium-containing mixed slag comprises the following steps:
  • Step 1 slag mixing:
  • the liquid molten 150kg titanium-containing blast furnace slag flowing out from the slag outlet and the 500kg electric furnace vanadium-containing titanium molten oxidized steel slag are poured into a converter with a graphite-magnesium composite thermal insulation mold release refractory, and fully mixed to form a titanium-containing mixed slag, which occurs. Smelting reduction reaction; the slag temperature after mixing is 1610 ° C;
  • Vanadium-containing titanium molten steel slag containing components and mass percentage thereof 5.00 wt% V 2 O 5 , TFe 15.49 wt%, 41.78 wt% CaO, 15.11 wt% SiO 2 , 2.54 wt% TiO 2 , 1.86 wt% MgO, 1.79 wt %MnO, 1.62wt% Al 2 O 3 , the balance is other impurities;
  • Injecting gas a preheated nitrogen-air mixture is sprayed into the titanium-containing mixed slag, and a nitrogen-air mixture is blown for 10 minutes; wherein the volume percentage of nitrogen in the nitrogen-air mixture is 40%. %, nitrogen-air mixture preheating temperature is 500 °C, nitrogen-air mixture time and flow rate relationship is 40L / (min ⁇ kg); nitrogen-air mixture injection method is to use refractory spray gun placed in mixed slag Blow in the upper part;
  • the temperature of the titanium-containing mixed slag is in the range of the set temperature of 1450 to 1600 ° C;
  • the remaining low-valent titanium is oxidized to high-priced titanium, and the remaining iron oxide is reduced to metallic iron;
  • the redox process measures the temperature of the mixed slag as high as 1618 ° C; because the temperature is higher than the set value, 1 kg of the titanium magnet concentrate concentrate containing carbon pre-reduction pellets is blown into the titanium-containing mixed slag to make titanium The temperature of the mixed slag is lowered to 1575 ⁇ 1582 ° C, within the set range;
  • the vanadium-containing titanium slag after reduction and oxidation is subjected to slag treatment outside the furnace, and the mass fraction of the vanadium-containing titanium slag TiO 2 after reduction oxidation is determined to be 8.9% ⁇ 10% by method D-1.
  • the oxidized vanadium-containing titanium slag is directly cooled and used as a cement raw material or building material;
  • a method for recovering and quenching and tempering a titanium-containing mixed slag comprises the following steps:
  • Step 1 slag mixing:
  • the liquid molten 420kg titanium-containing blast furnace slag and 380kg electric furnace vanadium-containing titanium fused oxide steel slag flowing out of the slag outlet are poured into a DC arc furnace with an asphalt-olivine composite thermal insulation mold release refractory material, and fully mixed to form a titanium-containing mixed melting furnace.
  • Slag, smelting reduction reaction; slag temperature after mixing is 1380 ° C;
  • Vanadium-containing titanium molten steel slag containing components and mass percentage thereof 2.56 wt% V 2 O 5 , TFe 15.36 wt%, 40.25 wt% CaO, 11.39 wt% SiO 2 , 5.35 wt% TiO 2 , 2.64 wt% MgO, 1.92 wt %MnO, 1.59wt% Al 2 O 3 , the balance is other impurities;
  • the refractory spray gun is inserted into the mixed slag to be blown;
  • the temperature of the titanium-containing mixed slag is in the range of the set temperature of 1450 to 1600 ° C;
  • the remaining low-valent titanium is oxidized to high-priced titanium, and the remaining iron oxide is reduced to metallic iron;
  • the reduced-oxidized vanadium-containing titanium slag is directly quenched and used as a cement raw material or a building material;
  • a method for recovering and quenching and tempering a titanium-containing mixed slag comprises the following steps:
  • Step 1 slag mixing:
  • the liquid molten 400kg titanium-containing blast furnace slag and 100kg converter vanadium-containing titanium molten steel slag flowing out of the slag outlet are poured into an inner layer of an anthracite-clay composite thermal insulation mold release refractory, and fully mixed to form a titanium-containing mixed slag. a smelting reduction reaction occurs; the slag temperature after mixing is 1389 ° C;
  • Vanadium-containing titanium molten steel slag containing components and mass percentage thereof 5.21 wt% V 2 O 5 , TFe 15.68 wt%, 40.01 wt% CaO, 12.12 wt% SiO 2 , 4.86 wt% TiO 2 , 2.66 wt% MgO, 1.90 wt %MnO, 1.71wt% Al 2 O 3 , the balance is other impurities;
  • Injecting gas a pre-heated nitrogen-oxygen mixed gas is sprayed into the titanium-containing mixed slag, and a nitrogen-oxygen mixed gas is sprayed for 8 minutes; wherein the volume percentage of nitrogen in the nitrogen-oxygen mixed gas is 60%. %, the preheating temperature of the nitrogen-oxygen mixture is 480 ° C, the relationship between the time of the nitrogen-oxygen mixture and the flow rate is 10 L / (min ⁇ kg); the blowing method of the nitrogen - oxygen mixture is to insert the mixed slag with the refractory spray gun Blow in
  • the temperature of the titanium-containing mixed slag is in the range of the set temperature of 1450 to 1600 ° C;
  • the remaining low-valent titanium is oxidized to high-priced titanium, and the remaining iron oxide is reduced to metallic iron;
  • the reduction oxidation process measures the mixed slag temperature of 1480 ⁇ 1488 ° C, within the set range;
  • method D-2 is adopted for the treatment of slag outside the furnace:
  • the reduced oxidation-containing vanadium-containing titanium slag is poured into the thermal insulation pit of the bituminous coal-high alumina composite thermal insulation mold release refractory material, and then the following operations are performed:
  • the preheated nitrogen-oxygen mixed gas is sprayed, and a nitrogen-oxygen mixed gas is sprayed for 2 minutes; wherein the volume percentage of nitrogen in the nitrogen-oxygen mixture is 60%.
  • the preheating temperature of the nitrogen-oxygen mixture is 500 °C, the relationship between the time of the nitrogen-oxygen mixture and the flow rate is 12 L/(min ⁇ kg); the blowing method of the nitrogen-oxygen mixture is to insert the mixed slag into the refractory spray gun. ;
  • the temperature of the titanium-containing mixed slag is in the range of a set temperature of 1400 to 1600 ° C;
  • the remaining low-valent titanium is oxidized to high-priced titanium, and the remaining iron oxide is reduced to metallic iron;
  • the reduction oxidation process measured the mixed slag temperature to be 1422 ⁇ 1429 ° C, within the set range;
  • the remaining low-priced titanium is oxidized to high-priced titanium, and the remaining iron oxide is reduced to metallic iron;
  • the oxidized slag is reduced and naturally cooled to room temperature to obtain a slow cooling slag
  • the vanadium-containing metal iron is settled to the bottom of the reaction device to form iron shovel, and the iron shovel is manually taken out; the vanadium-containing metal iron layer in the remaining slow slag is crushed to a particle size of 20-400 ⁇ m, and the remaining vanadium is separated by magnetic separation.
  • the upper, middle and lower parts of the slow-cooling slag for removing iron slag and vanadium-containing metal iron layer are separated by gravity separation method; the lower slow cooling slag is coarsely selected through the chute, the shaker is selected once, and the sweeping is performed twice.
  • the titanium-containing component is separated from the gangue to obtain a titanium concentrate with a main phase of perovskite phase, a vanadium-bearing magnesium-aluminum spinel medium ore and tailings, and the mass fraction of TiO 2 in the titanium concentrate is 48.96%.
  • the mass fraction of V 2 O 5 in the vanadium-containing magnesium-aluminum spinel is 9.65%
  • the mass fraction of P 2 O 5 in the phosphorus-rich phase is 30%;
  • the tailings were treated with 2% hydrochloric acid, and the phosphorus pentoxide was separated by a solid-liquid ratio of 1:2, and the phosphorus recovery rate was 80%.
  • a method for recovering and quenching and tempering a titanium-containing mixed slag comprises the following steps:
  • Step 1 slag mixing:
  • the liquid molten 380kg titanium-containing blast furnace slag and 480kg converter vanadium-containing titanium molten steel slag flowing out of the slag outlet are poured into a converter with petroleum pitch coke-silice composite thermal insulation mold release refractory, and fully mixed to form titanium-containing mixed slag. a smelting reduction reaction occurs; the slag temperature after mixing is 1632 ° C;
  • Vanadium-containing titanium molten steel slag containing components and mass percentage thereof 1.32 wt% V 2 O 5 , TFe 16.59 wt%, 43.12 wt% CaO, 13.33 wt% SiO 2 , 5.06 wt% TiO 2 , 3.68 wt% MgO, 2.67 wt %MnO, 2.00wt% Al 2 O 3 , the balance is other impurities;
  • Injecting gas In the titanium-containing mixed slag, the preheated oxygen is sprayed and a total of 6 minutes of oxygen is sprayed; wherein the oxygen preheating temperature is 1000 ° C, and the relationship between the oxygen time and the flow rate is 45 L/(min ⁇ Kg); the air is blown by inserting a mixed slag into the refractory spray gun;
  • the temperature of the titanium-containing mixed slag is in the range of the set temperature of 1450 to 1600 ° C;
  • the temperature of the mixed slag measured by the redox process is as high as 1612 ° C; since the temperature is higher than the set value, 1 kg of ordinary iron concentrate metallized pellets is added to the titanium-containing mixed slag to make the titanium-containing mixed slag The temperature is lowered to 1580 ⁇ 1585 ° C, within the set range;
  • the preheated oxygen is sprayed and a total of 3 minutes of oxygen is sprayed; wherein the preheating temperature of the oxygen mixed gas is 960 ° C, and the relationship between the time and flow rate of the oxygen mixed gas is 40 L/(min). ⁇ kg); the oxygen mixed gas is injected by means of a refractory spray gun inserted into the mixed slag;
  • the temperature of the titanium-containing mixed slag is in the range of a set temperature of 1400 to 1600 ° C;
  • the remaining low-valent titanium is oxidized to high-priced titanium, and the remaining iron oxide is reduced to metallic iron;
  • the reduction oxidation process measures the mixed slag temperature of 1570 ⁇ 1576 ° C, within the set range;
  • the remaining low-priced titanium is oxidized to high-priced titanium, and the remaining iron oxide is reduced to metallic iron;
  • the mixed slag after reduction and oxidation is separated, and the precipitated slag-gold is separated to obtain vanadium-containing molten iron and reduced-oxidized vanadium-containing titanium slag;
  • the mass fraction of the vanadium-containing titanium slag TiO 2 after reduction and oxidation is 8.5% ⁇ 10%
  • the reduced-oxidized vanadium-containing titanium slag is directly quenched and used as a cement raw material or a building material.

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Abstract

L'invention concerne un procédé de réduction par fusion, de recyclage et de revenu de scories mélangées titanifères, comprenant : (1) le mélange des scories de haut-fourneau titanifères avec des scories d'acier fondu contenant du vanadium-titane pour former des scories mélangées titanifères, et la régulation de la température des scories mélangées titanifères dans une plage de température définie ; (2) l'injection d'un gaz oxydant pour la réduction par fusion et l'oxydation, et pendant le procédé, la température des scories mélangées titanifères est maintenue dans la plage de température définie, et dans les scories mélangées titanifères, le titane de faible valence est oxydé en titane de haute valence, et l'oxyde de fer est réduit en fer métallique ; et (3) la séparation et le recyclage selon différents dispositifs de réaction. Selon l'invention, on réalise un recyclage efficace de l'élément titane, de l'élément fer, de l'élément vanadium, de l'élément phosphore et de l'élément oxyde de calcium libre dans les scories mélangées, et un matériau contenant du vanadium-titane-fer à l'état froid peut être traité pour réaliser la trempe des scories et une utilisation efficace et complète des ressources ; le procédé présente un temps de réaction court, un taux élevé de récupération de métaux, un faible coût de production, une grande adaptabilité de matières premières, une grande capacité de traitement, est respectueux de l'environnement et présente un avantage économique élevé, et les problèmes pendant un recyclage efficace de la ressource de métallurgie et de l'énergie thermique peuvent être efficacement résolus.
PCT/CN2016/091699 2016-07-18 2016-07-26 Procédé de réduction par fusion, de recyclage et de revenu de scories mélangées titanifères WO2018014363A1 (fr)

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CN111057877A (zh) * 2019-12-31 2020-04-24 永平县勇泰工业废渣有限公司 一种用于低品位钒废渣提炼钒的配料
TWI708849B (zh) * 2020-03-27 2020-11-01 金瑲水泥製品股份有限公司 安定化之還原碴的資源化方法
CN112321178A (zh) * 2020-11-05 2021-02-05 苏州大学 一种熔融含钛高炉渣在线连续处理方法
CN112457029B (zh) * 2020-12-08 2022-06-21 首钢集团有限公司 一种渣罐格栅用喷涂料及其使用方法
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AT525426A4 (de) * 2022-01-14 2023-04-15 Radmat Ag Verfahren zum Abtrennen von Eisenoxid aus Eisenoxid-haltigen und Phosphat-haltigen Schlackenschmelzen
AT525426B1 (de) * 2022-01-14 2023-04-15 Radmat Ag Verfahren zum Abtrennen von Eisenoxid aus Eisenoxid-haltigen und Phosphat-haltigen Schlackenschmelzen
WO2023135530A1 (fr) * 2022-01-14 2023-07-20 Radmat Ag Procédé de séparation d'oxyde de fer hors de laitiers à l'état fondu contenant de l'oxyde de fer et contenant du phosphate
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CN116555571A (zh) * 2023-04-27 2023-08-08 上海开鸿环保科技有限公司 危废污泥电热熔融资源化处理装置
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