WO2020151034A1 - 一种含钛铁矿物中有价组元的分离富集方法 - Google Patents

一种含钛铁矿物中有价组元的分离富集方法 Download PDF

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WO2020151034A1
WO2020151034A1 PCT/CN2019/075013 CN2019075013W WO2020151034A1 WO 2020151034 A1 WO2020151034 A1 WO 2020151034A1 CN 2019075013 W CN2019075013 W CN 2019075013W WO 2020151034 A1 WO2020151034 A1 WO 2020151034A1
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titanium
iron
ilmenite
valuable components
vanadium
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English (en)
French (fr)
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薛向欣
高子先
杨合
程功金
张乐
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Northeastern University China
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Northeastern University China
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B5/00—General methods of reducing to metals
    • C22B5/02—Dry methods smelting of sulfides or formation of mattes
    • C22B5/04—Dry methods smelting of sulfides or formation of mattes by aluminium, other metals or silicon
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/113—Silicon oxides; Hydrates thereof
    • C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G23/00—Compounds of titanium
    • C01G23/04—Oxides; Hydroxides
    • C01G23/047—Titanium dioxide
    • 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
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • 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
    • 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
    • C22B34/00—Obtaining refractory metals
    • C22B34/30—Obtaining chromium, molybdenum or tungsten
    • C22B34/32—Obtaining chromium
    • 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
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency

Definitions

  • the invention belongs to the technical field of comprehensive utilization of mineral resources, and specifically relates to a method for separating and enriching valuable components in ilmenite-containing minerals.
  • Vanadium-titanium magnetite is an important iron-containing resource. Due to the high titanium content of vanadium-titanium magnetite (titanium dioxide grade 7-13%), there is currently no mature all-vanadium-titanium smelting process. Normally, vanadium-titanium magnetite is combined with ordinary magnetite or hematite to be smelted in a blast furnace. In order to ensure the blast furnace goes forward, the maximum content of titanium dioxide in the blast furnace slag is controlled to 22%-24%. This type of blast furnace slag has low titanium content and low economic value. Currently, it is mainly piled up, occupying land and polluting the environment.
  • ilmenite has the advantages of abundant reserves and low price, and is often used to produce high-titanium slag and titanium dioxide.
  • the electric arc furnace adds carbon to reduce the separation of iron and titanium, or directly leaches the ilmenite by the sulfuric acid method to obtain titanium white.
  • the preparation of high-titanium slag in the electric arc furnace consumes a lot of energy, and the temperature required for reduction is as high as 1700-1750°C.
  • titanium dioxide by the sulfuric acid method
  • the presence of iron oxides in ilmenite will not only reduce the efficiency of sulfuric acid, but also produce a lot of waste. Liquid will cause serious pollution to the environment.
  • the present invention provides a method for separating and enriching valuable components in ferro-titanium minerals.
  • the method mixes ferro-titanium minerals with ferrosilicon alloy powder as a reducing agent. It is heated and kept in an electric furnace to cause the mixture to undergo a reduction reaction.
  • the ferromagnetic substance and the titanium-containing non-magnetic substance produced by the reaction are separated, thereby realizing the valuable component iron in the titanium-containing iron mineral , Separation and enrichment of titanium, ferromagnetic materials and titanium-containing non-magnetic materials can be used as raw materials for subsequent production; if the raw material ore is vanadium-titanium magnetite, the non-magnetic materials obtained by magnetic separation contain titanium and vanadium Valuable components such as chromium.
  • the main technical solutions adopted by the present invention include:
  • a method for separation and enrichment of valuable components in ferro-titanium minerals is to blend ferro-titanium minerals with ferrosilicon alloy powder as a reducing agent, and then heat and keep them in an electric furnace to carry out the reduction reaction. After grinding into fine powder, magnetic separation is performed to obtain ferromagnetic substance and titanium-containing non-magnetic substance.
  • the uniformly mixed mineral powder can be used directly, or it can be made into pellets or blocks and transferred to an electric furnace for heating and reaction.
  • the silicon content in the ferrosilicon alloy powder is 69 to 75 wt%, and the iron content is 25 to 31 wt%.
  • the titanium-containing iron mineral is low-grade vanadium-titanium magnetite, which contains components: FeO: 17.0-20.0wt%, CaO: 2.0-6.0wt %, SiO 2 : 6.0 ⁇ 8.0wt%, MgO: 0.5 ⁇ 0.9wt%, Al 2 O 3 : 1.3 ⁇ 2.5wt%, TiO 2 : 20.0 ⁇ 24.0wt%, V 2 O 5 : 1.6 ⁇ 1.8wt%, Cr 2 O 3 : 0.02 ⁇ 0.3wt%, S ⁇ 0.05wt%, P ⁇ 0.01wt%, and the balance is inevitable impurities; among them, TFe is 42.0-46.0wt.%.
  • titanium-containing iron mineral and the ferrosilicon alloy are uniformly blended according to a mass ratio of 100:12 to 35.
  • the ilmenite-containing iron mineral is ilmenite, which contains components: Fe 2 O 3 : 15.1 to 17.5%, FeO: 25.8 to 27.8%, TiO 2 : 43.4 to 45.6%, CaO: 0.8 to 0.9%, SiO 2 : 4.6 to 5.6%, MgO: 0.9 to 1.1%, Al 2 O 3 : 1.0 to 1.3%, the balance being unavoidable impurities.
  • the reaction conditions in the electric furnace are: under the protection of an inert atmosphere, heating to 1250 to 1500°C and holding for 10 to 120 minutes; the inert atmosphere is Ar, N 2 , A mixture of one or more of He; more preferably, the temperature is 1300-1450°C for 0.5-2h incubation.
  • the particle size of the ferrosilicon alloy powder below 75 ⁇ m accounts for more than 90 wt%, and the particle size of the titanium-containing iron minerals below 75 ⁇ m accounts for more than 70 wt%.
  • the titanium-containing iron mineral is dried in an oven.
  • drying is carried out in a drying box at 100-110°C for 4-12 hours to remove moisture and volatile acids.
  • the grinding into fine powder is to grind the reaction product cooled in an electric furnace to a particle size of less than 75 ⁇ m, accounting for more than 80 wt%.
  • the magnetic separation intensity is 120-240 kA/m during magnetic separation.
  • the electric furnace is a resistance furnace.
  • the ilmenite-containing minerals include, but are not limited to, ilmenite, high-grade vanadium-titanium magnetite, and low-grade vanadium-titanium magnetite.
  • ilmenite high-grade vanadium-titanium magnetite
  • low-grade vanadium-titanium magnetite is smelted by ore blending blast furnace or coal-based reduction-magnetic separation technology, the utilization of valuable components such as titanium and vanadium is very low.
  • the titanium-containing iron mineral is a low-grade vanadium-titanium magnetite, and after magnetic separation, a ferromagnetic substance and a non-magnetic substance containing titanium, vanadium and chromium are obtained respectively.
  • the recovery rates of iron, titanium, vanadium, and chromium in low-grade vanadium-titanium magnetite can reach 70%, 80%, 80%, and 90% respectively, and the obtained ferromagnetic material and titanium-containing magnetite
  • the non-magnetic materials of vanadium and chromium can be used as raw materials for subsequent production.
  • the present invention provides a method for separating and enriching valuable components in ferro-titanium minerals.
  • the ferro-titanium minerals include but not limited to vanadium-titanium magnetite and ilmenite
  • ferrosilicon alloy powder are mixed with ferrosilicon alloy powder.
  • the powder is used as a reducing agent, and then heated and kept in an electric furnace together to cause a reduction reaction, which converts the valuable components such as iron and titanium in the titanium-containing iron mineral into ferromagnetic materials and titanium-containing non-magnetic materials, and then grinds them into fine particles.
  • the powder is separated by magnetic separation. Among them, the recovery rates of iron, titanium, vanadium and chromium reach 70%, 80%, 80% and 90% respectively.
  • the non-magnetic material obtained varies depending on the raw material ore and whether it contains elements such as vanadium and chromium.
  • the non-magnetic material contains vanadium and chromium in addition to titanium.
  • the method of the present invention realizes the separation of valuable components, and compared with the method of blast furnace smelting in the Pigapu ore of the prior art, it can not only efficiently recover the valuable components iron, vanadium and chromium, but also simultaneously treat titanium Enrichment is beneficial for subsequent processing or production applications as raw materials.
  • the process of the present invention is very simple, is very suitable for industrial-scale production applications, and can also improve the recovery rate of vanadium, iron, titanium and chromium.
  • the raw material ore of Examples 1-7 is low-grade vanadium-titanium magnetite, and the raw material ore of Examples 8-15 is ilmenite.
  • This embodiment provides a method for separation and enrichment of valuable components in low-grade vanadium-titanium magnetite, which mainly uses titanium-containing iron minerals as raw materials, ferrosilicon alloys as reducing agents, and is heated and kept in an electric furnace. A reduction reaction occurs, and the valuable components iron, vanadium, and titanium in the raw material ore are converted into magnetic iron-containing materials and non-magnetic titanium, vanadium and chromium-containing materials, which are ground into fine powders and then separated by magnetic separation
  • the equipment realizes the separation and enrichment of iron, titanium, vanadium and chromium in titanium-containing iron minerals for subsequent further processing and utilization.
  • the method includes the following steps:
  • S2 Ingredients: The dried low-grade vanadium-titanium magnetite treated by S1 and ferrosilicon alloy powder (silicon 72% + iron 28%) are mixed uniformly according to a mass ratio of 100:23 to obtain a mixture. Among them, the proportion of ferrosilicon alloy powder whose particle size is less than 75 ⁇ m is about 90wt%.
  • S4 Grind the cooled reaction product to a particle size of less than 75 ⁇ m, accounting for more than 80% by weight, and perform magnetic separation at a field strength of 160 KA/m to obtain ferromagnetic materials and non-magnetic materials containing titanium, vanadium, and chromium, respectively.
  • the main component of the magnetic substance is metallic iron
  • the main component of the non-magnetic substance is silicon dioxide and titanium oxide.
  • the recovery rates of iron, titanium, vanadium, and chromium were 71%, 82%, 88%, and 95%, respectively.
  • the proportion of the particle size of the low-grade vanadium-titanium magnetite under 75 ⁇ m is 70wt% or more; preferably, ferrosilicon alloy powder
  • the proportion of the particle size below 75 ⁇ m is above 90wt%.
  • step S2 low-grade vanadium-titanium magnetite and ferrosilicon alloy powder are uniformly mixed in a mass ratio of 100:28, but pre-compressed into agglomerates; wherein, the ferrosilicon alloy powder contains 70% silicon and 30% iron.
  • step S3 under the protection of argon atmosphere, the resistance furnace is heated to 1350° C., and the temperature is kept for 2 hours.
  • step S4 pulverize to a particle size of less than 75 ⁇ m accounting for more than 80%, and then magnetically separate the particles in a field strength of 200KA/m.
  • a ferromagnetic substance and a non-magnetic substance containing titanium, vanadium, and chromium are obtained, respectively.
  • the recovery rates of iron, vanadium, chromium, and titanium were 70%, 85%, 84%, and 93%, respectively.
  • step S2 low-grade vanadium-titanium magnetite and ferrosilicon alloy powder are uniformly mixed in a mass ratio of 100:28, and then pressed into a block.
  • the silicon-iron alloy powder contains 75% silicon and 25% iron.
  • step S3 under the protection of nitrogen atmosphere, the resistance furnace is heated to 1400° C., and the temperature is kept for 1 hour.
  • step S4 pulverize to a particle size of less than 75 ⁇ m accounting for more than 80%, and then magnetically separate the particles in a field strength of 120 KA/m.
  • a ferromagnetic substance and a non-magnetic substance containing titanium, vanadium, and chromium are obtained, respectively.
  • the recovery rates of iron, vanadium, chromium, and titanium were 71%, 86%, 81%, and 92%, respectively.
  • step S2 low-grade vanadium-titanium magnetite and ferrosilicon alloy powder are uniformly mixed in a mass ratio of 100:25, and the ferrosilicon alloy powder contains 74% silicon and 26% iron.
  • step S3 under the protection of an argon atmosphere, heating to 1400° C., holding and reacting for 2 hours.
  • step S4 pulverize to a particle size of less than 75 ⁇ m accounting for more than 80%, and then magnetically separate the particles in a field strength of 200KA/m.
  • a ferromagnetic substance and a non-magnetic substance containing titanium, vanadium, and chromium are obtained, respectively.
  • the recovery rates of iron, vanadium, chromium, and titanium are 76%, 80%, 81%, and 93%, respectively.
  • step S2 low-grade vanadium-titanium magnetite and ferrosilicon alloy powder are uniformly mixed in a mass ratio of 100:26, and the ferrosilicon alloy powder contains 70% silicon and 30% iron.
  • step S3 under the protection of an argon atmosphere, heating to 1450° C., holding and reacting for 30 min.
  • step S4 it is pulverized to a particle size of less than 75 ⁇ m accounting for more than 80%, and then magnetic separation is performed at a field strength of 240 KA/m.
  • a ferromagnetic substance and a non-magnetic substance containing titanium, vanadium, and chromium are obtained, respectively.
  • the recovery rates of iron, vanadium, chromium, and titanium were 74%, 83%, 86%, and 96%, respectively.
  • step S2 low-grade vanadium-titanium magnetite and ferrosilicon alloy powder are uniformly mixed in a mass ratio of 100:22, and the ferrosilicon alloy powder contains 75% silicon and 25% iron.
  • step S3 under the protection of an argon atmosphere, heating to 1430° C., holding and reacting for 1.5 hours.
  • step S4 it is pulverized to a particle size of less than 75 ⁇ m accounting for more than 80%, and then magnetic separation is performed at a field strength of 180KA/m.
  • a ferromagnetic substance and a non-magnetic substance containing titanium, vanadium, and chromium are obtained, respectively.
  • the recovery rates of iron, vanadium, chromium, and titanium were 71%, 88%, 83%, and 97%, respectively.
  • step S2 low-grade vanadium-titanium magnetite and ferrosilicon alloy powder are uniformly mixed in a mass ratio of 100:30, and the ferrosilicon alloy powder contains 75% silicon and 25% iron.
  • step S3 under the protection of a helium atmosphere, heating to 1450° C., holding and reacting for 2 hours.
  • step S4 pulverize to a particle size of less than 75 ⁇ m, which accounts for more than 80%, and then magnetically separate in a field strength of 220KA/m.
  • a ferromagnetic substance and a non-magnetic substance containing titanium, vanadium, and chromium are obtained, respectively.
  • the recovery rates of iron, vanadium, chromium, and titanium are 78%, 81%, 81%, and 96%, respectively.
  • This embodiment provides a method for separating valuable components in ilmenite, which mainly uses ferrosilicon alloy as a reducing agent to mix uniformly with ilmenite, and then heat and keep it in an electric furnace, during which a reduction reaction occurs, and the ilmenite
  • the valuable components of iron and titanium are converted into magnetic iron powder and non-magnetic titanium-containing material. After being ground into fine powder, the iron powder and titanium-containing material powder are separated by a magnetic separation equipment. For subsequent further processing and utilization.
  • the method includes the following steps:
  • S1 Drying pretreatment of ilmenite: Put the ilmenite into an oven at 105-110°C for 4 to 5 hours.
  • the ilmenite has a particle size of less than 75 ⁇ m, accounting for about 80% by weight. After drying in an oven, moisture is removed.
  • the components of ilmenite used and the weight percentage of each component are Fe 2 O 3 :
  • S2 Ingredients: The dried ilmenite treated by S1 and ferrosilicon alloy powder (silicon 70% + iron 30%) are uniformly mixed according to a mass ratio of 100:14.6 to obtain a mixture. Among them, the proportion of ferrosilicon alloy powder whose particle size is less than 75 ⁇ m is about 95wt%.
  • S4 Grind the cooled reaction product to a particle size of less than 75 ⁇ m and account for more than 80% by weight, and perform magnetic separation at a field strength of 180KA/m to obtain magnetic iron powder and non-magnetic titanium-containing powder. Among them, the recovery rate of iron can reach more than 73%, and the recovery rate of titanium is 86%.
  • the proportion of the ilmenite with a particle size below 75 ⁇ m is 70wt% or more; preferably, the particle size of the ferrosilicon alloy powder is below 75 ⁇ m The proportion of more than 90wt%.
  • step S2 ilmenite and ferrosilicon alloy powder are uniformly mixed at a mass ratio of 100:14.8, and then pre-compressed into pellets; among them, the ferrosilicon alloy powder Silicon 71%, iron 29%.
  • step S3 under the protection of an argon atmosphere, the pellets are put into a resistance furnace, heated to 1400° C. by the resistance furnace, and kept for 100 minutes to react.
  • step S4 pulverize to a particle size of less than 75 ⁇ m, which accounts for more than 80%, and then magnetically separate at a field strength of 190KA/m.
  • the magnetic vanadium-containing iron powder and the non-magnetic titanium-containing powder are obtained respectively.
  • the recovery rate of iron can reach more than 74%, and the recovery rate of titanium is 86%.
  • step S2 ilmenite and ferrosilicon alloy powder are uniformly mixed in a mass ratio of 100:18, and then pressed into a block.
  • the silicon-iron alloy powder contains 72% silicon and 28% iron.
  • step S3 under the protection of a nitrogen atmosphere, the block is placed in a resistance furnace, heated to 1450°C, and kept for 90 minutes to react.
  • step S4 pulverize to a particle size of less than 75 ⁇ m accounting for more than 80%, and then magnetically separate the particles in a field strength of 200KA/m.
  • the magnetic iron powder and the non-magnetic titanium-containing powder are obtained separately. Among them, the recovery rate of iron can reach more than 76%, and the recovery rate of titanium is 83%.
  • step S2 ilmenite and ferrosilicon alloy powder are uniformly mixed in a mass ratio of 100:15.2, and the ferrosilicon alloy powder contains 73% silicon and 27% iron.
  • step S3 under the protection of an argon atmosphere, the powder mixture is placed in a resistance furnace, heated to 1440° C., and temperature-preserved for 70 min.
  • step S4 pulverize to a particle size of less than 75 ⁇ m, accounting for more than 80%, and then magnetically separate the particles in a field strength of 210KA/m.
  • the magnetic iron powder and the non-magnetic titanium-containing powder are obtained separately. Among them, the recovery rate of iron can reach more than 77%, and the recovery rate of titanium is 85%.
  • step S2 the ilmenite and ferrosilicon alloy powder are uniformly mixed and pre-pressed into pellets at a mass ratio of 100:14.8, wherein the ferrosilicon alloy powder contains 74 silicon %, iron 26%.
  • step S3 under the protection of an argon atmosphere, heating to 1430° C., holding and reacting for 60 minutes.
  • step S4 pulverize to a particle size of less than 75 ⁇ m, which accounts for more than 80%, and then magnetically separate in a field strength of 220KA/m.
  • the magnetic iron powder and the non-magnetic titanium-containing powder are obtained separately. Among them, the recovery rate of iron can reach more than 72%, and the recovery rate of titanium is 88%.
  • step S2 ilmenite and ferrosilicon alloy powder are uniformly mixed at a mass ratio of 100:15.5, and the ferrosilicon alloy powder contains 75% silicon and 25% iron.
  • step S3 under the protection of an argon atmosphere, heating to 1450° C., holding and reacting for 0.5 h.
  • step S4 it is pulverized to a particle size of less than 75 ⁇ m accounting for more than 80%, and then magnetic separation is performed at a field strength of 230 KA/m.
  • the magnetic iron powder and the non-magnetic titanium-containing powder are obtained separately. Among them, the recovery rate of iron can reach more than 71%, and the recovery rate of titanium is 82%.
  • step S2 ilmenite and ferrosilicon alloy powder are uniformly mixed at a mass ratio of 100:19, and the ferrosilicon alloy powder contains 70% silicon and 30% iron.
  • step S3 under the protection of a helium atmosphere, heating to 1400° C., holding and reacting for 1.5 hours.
  • step S4 it is pulverized to a particle size of less than 75 ⁇ m accounting for more than 80%, and then magnetic separation is performed at a field strength of 180KA/m.
  • the magnetic iron powder and the non-magnetic titanium-containing powder are obtained separately. Among them, the recovery rate of iron can reach more than 72%, and the recovery rate of titanium is 85%.
  • step S2 ilmenite and ferrosilicon alloy powder are uniformly mixed at a mass ratio of 100:35, and the ferrosilicon alloy powder contains 74% silicon and 26% iron.
  • step S3 under the protection of a helium atmosphere, heating to 1350° C., holding and reacting for 2 hours.
  • step S4 pulverize to a particle size of less than 75 ⁇ m accounting for more than 80%, and then magnetically separate the particles in a field strength of 200KA/m.
  • the magnetic iron powder and the non-magnetic titanium-containing powder are obtained separately. Among them, the recovery rate of iron can reach more than 75%, and the recovery rate of titanium is 81%.
  • the reaction temperature of the present invention is lower (about 1250-1500°C). On the one hand, it can reduce the reduction temperature of ilmenite and save energy; on the other hand, it does not need to be used. Sulfuric acid reduces the amount of waste liquid produced in the subsequent preparation of titanium dioxide products.
  • the process of the invention is simple and is suitable for large-scale production applications. Among them, the recovery rate of iron in ilmenite can reach more than 70%, and the recovery rate of titanium can reach more than 80%, so the separation and enrichment effect is very good.

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Abstract

一种含钛铁矿物中有价组元的分离富集方法，将含钛铁矿物与作为还原剂硅铁合金粉共混，然后在电炉中被加热和保温以进行还原反应，反应完后磨成细粉，再进行磁选分离，得到含铁磁性物和含钛非磁性物。所述含钛铁矿物包括但不限于钛铁矿和钒钛磁铁矿。相比较于电弧炉冶炼钛铁矿制备高钛渣技术，该方法的反应温度较低，可以降低钛铁矿的还原温度，节约能源，且对钛铁矿中的有价组元铁、钛实现了有效的分离富集，铁、钛的回收率分别可达到70％和80％以上。相比较于传统的高炉冶炼钒钛磁铁矿，该方法不仅可以回收有价组元钛，而且还可以提高钒和铬的回收率，铁、钛、钒和铬的回收率分别可达70％、80％、80％和90％以上。

Description

一种含钛铁矿物中有价组元的分离富集方法 技术领域
本发明属于矿产资源综合利用技术领域，具体涉及一种含钛铁矿物中有价组元的分离富集方法。
背景技术
钒钛磁铁矿是一种重要的含铁资源。由于钒钛磁铁矿的钛含量较高(二氧化钛品位7-13％)目前尚无成熟的全钒钛冶炼工艺。通常采用钒钛磁铁矿配合普通磁铁矿或赤铁矿入高炉冶炼，为保证高炉顺行，控制高炉渣中二氧化钛含量最高为22％-24％。该类型的高炉渣由于钛含量较低，经济价值较低，目前主要处于堆放状态，占地且污染环境。尤其对于低品位钒钛磁铁矿而言，由于其中的二氧化钛品位可达20-24％，虽然也可通过配加普矿采用高炉冶炼，但由于配矿后高炉炉料总的铁品位会降低，这样不仅会增加高炉焦比，而且有价组元钛也会进入炉渣中，使钛无法得到有效利用。而若采用非高炉法的煤基还原-磁选分离技术，虽然也可以达到有价组元提取的目的，但该钒钛磁铁矿中的钛最多只有约50％可被富集到非磁性物中，而此时钒资源的回收率也仅有68％。由此可见，低品位钒钛磁铁矿中的钒钛有价组元回收率均较低。
与此同时，钛铁矿具有储量丰富，价格低廉等优点，常被用来生产高钛渣和钛白。但在常规的钛铁分离工艺中，电弧炉加碳还原分离铁和钛，或者采用硫酸法直接浸出钛铁矿，获得钛白。电弧炉制备高钛渣会消耗大量能量，还原所需温度高达1700-1750℃，而硫酸法生产钛白，由于钛铁矿中铁氧化物的存在不仅会降低硫酸效率，而且该方法会产生大量废液，会对环境构成严重污染。
因此，如何高效回收利用这些含钛铁的矿物中的有价组元，最大程 度地资源化利用、节省能耗、减少使用硫酸带来的大量废液和环境污染，是一项值得探讨和研究的课题。
发明内容
(一)要解决的技术问题
为了解决现有技术的上述问题，本发明提供一种含钛铁矿物中有价组元的分离富集方法，该方法将含钛铁矿物与作为还原剂的硅铁合金粉混合，然而在电炉中加热并保温，使混合物发生还原反应，再结合磁选分离法，将反应生成的含铁磁性物和含钛非磁性物分离，从而实现对该含钛铁矿物中有价组元铁、钛的分离和富集，含铁磁性物和含钛非磁性物均可作为后续生产的原料；若原料矿为钒钛磁铁矿，则磁选分离得到的非磁性物中含钛、钒和铬等有价组元。
(二)技术方案
为了达到上述目的，本发明采用的主要技术方案包括：
一种含钛铁矿物中有价组元的分离富集方法，是将含钛铁矿物与作为还原剂硅铁合金粉共混，然后在电炉中被加热和保温以进行还原反应，反应完后磨成细粉，再进行磁选分离，得到含铁磁性物和含钛非磁性物。
其中，含钛铁矿物与硅铁合金粉混匀后，可将混合均匀后的矿粉或直接备用，或制成球团或块体后转移至电炉中加热反应。
在本发明的一个较佳实施例中，其中，所述硅铁合金粉中硅含量为69～75wt％、铁含量为25～31wt％。
在本发明的一个较佳实施例中，其中，所述含钛铁矿物为低品位钒钛磁铁矿，其包含的组分为：FeO：17.0～20.0wt％，CaO：2.0～6.0wt％，SiO 2：6.0～8.0wt％，MgO：0.5～0.9wt％，Al 2O 3：1.3～2.5wt％，TiO 2：20.0～24.0wt％，V 2O 5：1.6～1.8wt％，Cr 2O 3：0.02～0.3wt％，S≤0.05wt％，P≤0.01wt％，余量为不可避免的杂质；其中，TFe为42.0～46.0wt.％。
在本发明的一个较佳实施例中，其中，所述含钛铁矿物与硅铁合金的按照质量比100：12～35共混均匀。
在本发明的一个较佳实施例中，其中，所述含钛铁矿物为钛铁矿，其包含的组分为：Fe 2O 3：15.1～17.5％，FeO：25.8～27.8％，TiO 2：43.4～45.6％,CaO：0.8～0.9％，SiO 2：4.6～5.6％，MgO：0.9～1.1％，Al 2O 3：1.0～1.3％，余量为不可避免的杂质。
在本发明的一个较佳实施例中，其中，所述钛铁矿与硅铁合金粉是按照质量比100:12-21配料及共混。
在本发明的一个较佳实施例中，其中，在电炉中的反应条件是：在惰性气氛保护下，加热至1250～1500℃并保温10～120分钟；所述惰性气氛为Ar、N 2、He中的一种或几种的混合气；更优选是在1300-1450℃，保温反应0.5-2h。
在本发明的一个较佳实施例中，其中，所述硅铁合金粉的粒度在75μm以下的占90wt％以上，所述含钛铁矿物粒度在75μm以下的占70wt％以上。
在本发明的一个较佳实施例中，其中，所述含钛铁矿物在还原反应之前，先在烘箱中进行烘干处理。优选地，烘干是在100-110℃的干燥箱中干燥4-12h，以去除水分和挥发性酸等。
在本发明的一个较佳实施例中，其中，所述磨成细粉是将电炉中冷却的反应产物磨成粒度在75μm以下占80wt％以上。
优选地，磁选分离时磁选强度为120～240kA/m。
在本发明一个较优选实施例中，所述电炉为电阻炉。
在本发明一个较优选实施例中，所述含钛铁矿物包括但不限于钛铁矿、高品位钒钛磁铁矿及低品位钒钛磁铁矿。特别地，由于低品位钒钛磁铁矿无论是采用配矿高炉冶炼法，还是煤基还原-磁选分离技术，其中钛、钒等有价组元都利用率都非常低。为了解决该技术问题，优选地，所述含钛铁矿物为低品位钒钛磁铁矿，磁选分离后，分别得到含铁磁性物和含钛、钒和铬的非磁性物。本发明的方法，对低品位钒钛磁铁矿中的铁、钛、钒和铬的回收率分别可达到70％、80％、80％和90％以上，得到的含铁磁性物和含钛、钒和铬的非磁性物可作为后续生产的原料。
其中，原料矿是低品位钒钛磁铁矿时，与硅铁合金粉可发生的化学反应包含但不限于：Fe 3O 4+FeSi 2＝4Fe+2SiO 2,Fe 3O 4+2Si＝3Fe+2SiO 2,Fe 3O 4+2FeSi 2＝5Fe+4SiO,Fe 3O 4+4Si＝3Fe+4SiO,4FeTiO 3+FeSi 2＝3Fe+2FeTi 2O 5+2SiO,2FeTiO 3+Si＝Fe+FeTi 2O 5+SiO,8FeTiO 3+FeSi 2＝5Fe+4FeTi 2O 5+2SiO 2,4FeTiO 3+Si＝2Fe+2FeTi 2O 5+SiO 2，Fe(Fe,V) 2O 4+6Si+4FeTiO 3＝2(Fe,V)Ti 2O 5+5Fe+6SiO,Fe(Fe,V) 2O 4+4FeTiO 3+3Si＝5Fe+3SiO 2+2(Fe,V)Ti 2O 5。
其中，原料矿是钛铁矿时，其与硅铁合金粉可发生的化学反应包含：Fe 3O 4+FeSi 2＝4Fe+2SiO 2,Fe 3O 4+2Si＝3Fe+2SiO 2,Fe 3O 4+2FeSi 2＝5Fe+4SiO,Fe 3O 4+4Si＝3Fe+4SiO,4FeTiO 3+FeSi 2＝3Fe+2FeTi 2O 5+2SiO,2FeTiO 3+Si＝Fe+FeTi 2O 5+SiO,8FeTiO 3+FeSi 2＝5Fe+4FeTi 2O 5+2SiO 2,4FeTiO 3+Si＝2Fe+2FeTi 2O 5+SiO 2。
(三)有益效果
本发明的有益效果是：
本发明提供一种含钛铁矿物中有价组元的分离富集方法，将含钛铁矿物(包括但不限于钒钛磁铁矿和钛铁矿)与硅铁合金粉混合，硅铁合金粉作为还原剂，然后共同在电炉中加热并保温发生还原反应，将含钛铁矿物中的铁、钛等有价组元转化成含铁磁性物和含钛非磁性物，然后磨成细粉进行磁选分离。其中铁、钛、钒和铬的回收率分别达到70％、80％、80％和90％以上。根据原料矿的不同、是否含钒、铬等元素，得到非磁性物也不同，对于钒钛磁铁矿而言，非磁性物除了含钛，还含钒和铬。
本发明的方法实现了有价组元的分离，而相比于现有技术的配加普矿采用高炉冶炼的方法，不仅可高效回收有价组元铁、钒和铬，而且还同时对钛进行富集，有利于作为原料进行后续处理或生产应用。相比传统的非高炉法的煤基还原-磁选分离技术，本发明的工艺过程很简单，非常适于工业规模化生产应用，还可提高钒、铁、钛和铬的回收率。
具体实施方式
为了更好的解释本发明，以下通过具体实施方式，对本发明作详细描述。
以下实施例中，实施例1-7的原料矿是低品位钒钛磁铁矿，实施例8-15的原料矿是钛铁矿。
实施例1
本实施例提供一种低品位钒钛磁铁矿中有价组元的分离富集方法，其主要是利用含钛铁矿物为原料，硅铁合金为还原剂，在电炉中加热并保温，期间发生还原反应，将原料矿中的有价组元铁、钒、钛转化成磁性的含铁物和非磁性的含钛、钒和铬物，经磨碎成细粉后，再经磁选分离设备，实现对含钛铁矿物中铁、钛、钒和铬的分离和富集，以用于后续的进一步处理和利用。所述方法包含以下步骤：
S1:低品位钒钛磁铁矿的干燥前处理：将低品位钒钛磁铁矿放入105～110℃烘箱烘干4～5h，该低品位钒钛磁铁矿中粒度在75μm以下占比约75wt％。
S2:配料：将经S1处理的干燥的低品位钒钛磁铁矿与硅铁合金粉(硅72％+铁28％)按照质量比100:23混合均匀，得到混合料。其中硅铁合金粉粒度在75μm以下的占比约90wt％。
S3:还原：将混合料放入电阻炉中加热，在氮气气氛保护下，温度达到1300℃后，保温120min，之后随炉冷却至室温。
S4:将冷却后的反应产物磨碎至粒度在75μm以下占80wt％以上，在场强160KA/m进行磁选分离，分别得到含铁磁性物和含钛、钒和铬的非磁性物。
其中，磁性物的主要成分为金属铁，非磁性物的主要组分为二氧化硅和氧化钛。本实施例中，铁、钛、钒和铬的回收率分别为71％、82％、88％和95％。
为了尽可能使还原反应更充分、节省能耗、提高各组元回收率，其 中优选地，低品位钒钛磁铁矿中粒度在75μm以下的占比为70wt％以上；优选地，硅铁合金粉粒度在75μm以下的占比在90wt％以上。
实施例2
本实施例是在实施例1的基础上，不同之处在于：
步骤S2中，低品位钒钛磁铁矿与硅铁合金粉按100：28质量比均匀混合，然而预压成团；其中，硅铁合金粉中硅70％、铁30％。
步骤S3中，在氩气气氛保护下，电阻炉加热至1350℃，保温反应2h。
步骤S4中，磨碎成粒度在75μm以下占80％以上，然后在场强200KA/m中磁选分离。分别得到含铁磁性物和含钛、钒和铬的非磁性物。
本实施例中，铁、钒、铬和钛的回收率分别为70％、85％、84％和93％。
实施例3
本实施例是在实施例1的基础上，不同之处在于：
步骤S2中，低品位钒钛磁铁矿与硅铁合金粉按100：28质量比均匀混合，然后压制成块体。其中，硅铁合金粉中硅75％、铁25％。
步骤S3中，在氮气气氛保护下，电阻炉加热至1400℃，保温反应1h。
步骤S4中，磨碎成粒度在75μm以下占80％以上，然后在场强120KA/m中磁选分离。分别得到含铁磁性物和含钛、钒和铬的非磁性物。
本实施例中，铁、钒、铬和钛的回收率分别为71％、86％、81％和92％。
实施例4
本实施例是在实施例1的基础上，不同之处在于：
步骤S2中，低品位钒钛磁铁矿与硅铁合金粉按100：25质量比均匀混合，硅铁合金粉中硅74％、铁26％。
步骤S3中，在氩气气氛保护下，加热至1400℃，保温反应2h。
步骤S4中，磨碎成粒度在75μm以下占80％以上，然后在场强200KA/m中磁选分离。分别得到含铁磁性物和含钛、钒和铬的非磁性物。
本实施例中，铁、钒、铬和钛的回收率分别为76％、80％、81％和93％。
实施例5
本实施例是在实施例1的基础上，不同之处在于：
步骤S2中，低品位钒钛磁铁矿与硅铁合金粉按100：26质量比均匀混合，硅铁合金粉中硅70％、铁30％。
步骤S3中，在氩气气氛保护下，加热至1450℃，保温反应30min。
步骤S4中，磨碎成粒度在75μm以下占80％以上，然后在场强240KA/m中磁选分离。分别得到含铁磁性物和含钛、钒和铬的非磁性物。
本实施例中，铁、钒、铬和钛的回收率分别为74％、83％、86％和96％。
实施例6
本实施例是在实施例1的基础上，不同之处在于：
步骤S2中，低品位钒钛磁铁矿与硅铁合金粉按100：22质量比均匀混合，硅铁合金粉中硅75％、铁25％。
步骤S3中，在氩气气氛保护下，加热至1430℃，保温反应1.5h。
步骤S4中，磨碎成粒度在75μm以下占80％以上，然后在场强180KA/m中磁选分离。分别得到含铁磁性物和含钛、钒和铬的非磁性物。
本实施例中，铁、钒、铬和钛的回收率分别为71％、88％、83％和97％。
实施例7
本实施例是在实施例1的基础上，不同之处在于：
步骤S2中，低品位钒钛磁铁矿与硅铁合金粉按100：30质量比均匀混合，硅铁合金粉中硅75％、铁25％。
步骤S3中，在氦气气氛保护下，加热至1450℃，保温反应2h。
步骤S4中，磨碎成粒度在75μm以下占80％以上，然后在场强220KA/m中磁选分离。分别得到含铁磁性物和含钛、钒和铬的非磁性物。
本实施例中，铁、钒、铬和钛的回收率分别为78％、81％、81％和96％。
实施例8
本实施例提供一种钛铁矿中有价组元的分离方法，其主要是利用硅铁合金为还原剂与钛铁矿混合均匀，然后电炉中加热并保温，期间发生还原反应，将钛铁矿中的有价组元铁、钛转化成磁性的铁粉和非磁性的含钛物，经磨碎成细粉后，再经磁选分离设备，将铁粉和含钛物粉末分离开，以用于后续的进一步处理和利用。
具体地，所述方法包含如下步骤：
S1:钛铁矿的干燥前处理：将钛铁矿放入105～110℃烘箱烘干4～5h，该钛铁矿中粒度在75μm以下占比约80wt％。经过烘箱干燥处理，去除水分。
其中，所用钛铁矿的组分及各组分的重量百分比为Fe 2O 3：
15.1～17.5％，FeO：25.8～27.8％，TiO 2：43.4～45.6％,CaO：0.8～0.9％，SiO 2：4.6～5.6％，MgO：0.9～1.1％，Al 2O 3：1.0～1.3％，余量为不可避免的杂质。
S2:配料：将经S1处理的干燥的钛铁矿与硅铁合金粉(硅70％+铁30％)按照质量比100:14.6混合均匀，得到混合料。其中硅铁合金粉粒度在75μm以下的占比约95wt％。
S3:还原：将混合料放入电阻炉中加热，在氮气气氛保护下，温度达到1380℃后，保温120min，之后随炉冷却至室温。
S4:将冷却后的反应产物磨碎至粒度在75μm以下占80wt％以上，在场强180KA/m进行磁选分离，分别得到磁性铁粉和非磁性含钛物粉末。其中，铁的回收率可达为73％以上，钛的回收率为86％。
为了尽可能使还原反应更充分、节省能耗、提高各组元回收率，其中优选地，钛铁矿中粒度在75μm以下的占比为70wt％以上；优选地，硅 铁合金粉粒度在75μm以下的占比在90wt％以上。
实施例9
本实施例是在实施例8的基础上，不同之处在于：步骤S2中，钛铁矿与硅铁合金粉按100：14.8质量比均匀混合，然后预压成球团；其中，硅铁合金粉中硅71％、铁29％。步骤S3中，在氩气气氛保护下，将球团放入电阻炉中，由电阻炉加热至1400℃，保温反应100min。步骤S4中，磨碎成粒度在75μm以下占80％以上，然后在场强190KA/m中磁选分离。分别得到磁性的含钒铁粉和非磁性的含钛物粉末。
其中，铁的回收率可达为74％以上，钛的回收率为86％。
实施例10
本实施例是在实施例8的基础上，不同之处在于：步骤S2中，钛铁矿与硅铁合金粉按100：18质量比均匀混合，然后压制成块体。其中，硅铁合金粉中硅72％、铁28％。步骤S3中，在氮气气氛保护下，将块体物置于电阻炉，加热至1450℃，保温反应90min。步骤S4中，磨碎成粒度在75μm以下占80％以上，然后在场强200KA/m中磁选分离。分别得到磁性的铁粉和非磁性的含钛物粉末。其中，铁的回收率可达为76％以上，钛的回收率为83％。
实施例11
本实施例是在实施例8的基础上，不同之处在于：步骤S2中，钛铁矿与硅铁合金粉按100：15.2质量比均匀混合，硅铁合金粉中硅73％、铁27％。步骤S3中，在氩气气氛保护下，将粉末混合物置于电阻炉中，加热至1440℃，保温反应70min。步骤S4中，磨碎成粒度在75μm以下占80％以上，然后在场强210KA/m中磁选分离。分别得到磁性的铁粉和非磁性的含钛物粉末。其中，铁的回收率可达为77％以上，钛的回收率为85％。
实施例12
本实施例是在实施例8的基础上，不同之处在于：步骤S2中，钛铁 矿与硅铁合金粉按100：14.8质量比均匀混合并预压成球团，其中硅铁合金粉中硅74％、铁26％。步骤S3中，在氩气气氛保护下，加热至1430℃，保温反应60min。步骤S4中，磨碎成粒度在75μm以下占80％以上，然后在场强220KA/m中磁选分离。分别得到磁性的铁粉和非磁性的含钛物粉末。其中，铁的回收率可达为72％以上，钛的回收率为88％。
实施例13
本实施例是在实施例8的基础上，不同之处在于：步骤S2中，钛铁矿与硅铁合金粉按100：15.5质量比均匀混合，硅铁合金粉中硅75％、铁25％。步骤S3中，在氩气气氛保护下，加热至1450℃，保温反应0.5h。步骤S4中，磨碎成粒度在75μm以下占80％以上，然后在场强230KA/m中磁选分离。分别得到磁性的铁粉和非磁性的含钛物粉末。其中，铁的回收率可达为71％以上，钛的回收率为82％。
实施例14
本实施例是在实施例8的基础上，不同之处在于：步骤S2中，钛铁矿与硅铁合金粉按100：19质量比均匀混合，硅铁合金粉中硅70％、铁30％。步骤S3中，在氦气气氛保护下，加热至1400℃，保温反应1.5h。步骤S4中，磨碎成粒度在75μm以下占80％以上，然后在场强180KA/m中磁选分离。分别得到磁性的铁粉和非磁性的含钛物粉末。其中，铁的回收率可达为72％以上，钛的回收率为85％。
实施例15
本实施例是在实施例8的基础上，不同之处在于：步骤S2中，钛铁矿与硅铁合金粉按100：35质量比均匀混合，硅铁合金粉中硅74％、铁26％。步骤S3中，在氦气气氛保护下，加热至1350℃，保温反应2h。步骤S4中，磨碎成粒度在75μm以下占80％以上，然后在场强200KA/m中磁选分离。分别得到磁性的铁粉和非磁性的含钛物粉末。其中，铁的回收率可达为75％以上，钛的回收率为81％。
与常规对钛铁矿中钛铁分离工艺相比较，本发明的反应温度较低(约 1250-1500℃)，一方面可以降低钛铁矿的还原温度，节约能源；另一方面不需用到硫酸，减少后续制备钛白产品所产生的废液量。本发明工艺过程简单，适宜于规模化生产应用。其中对钛铁矿中铁的回收率可达70％以上，钛的回收率可达80％以上，因此分离、富集效果很好。
以上所述，仅是本发明的较佳实施例而已，并非是对本发明做其它形式的限制，任何本领域技术人员可以利用上述公开的技术内容加以变更或改型为等同变化的等效实施例。但是凡是未脱离本发明技术方案内容，依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与改型，仍属于本发明技术方案的保护范围。

Claims (10)

  1. 一种含钛铁矿物中有价组元的分离富集方法，其特征在于，将含钛铁矿物与作为还原剂硅铁合金粉共混，然后在电炉中被加热和保温以进行还原反应，反应完后磨成细粉，再进行磁选分离，得到含铁磁性物和含钛非磁性物。
  2. 根据权利要求1所述的一种含钛铁矿物中有价组元的分离富集方法，其特征在于，所述硅铁合金粉中硅含量为69～75wt％、铁含量为25～31wt％。
  3. 根据权利要求2所述的一种含钛铁矿物中有价组元的分离富集方法，所述含钛铁矿物为低品位钒钛磁铁矿，其包含的组分为：FeO：17.0～20.0wt％，CaO：2.0～6.0wt％，SiO 2：6.0～8.0wt％，MgO：0.5～0.9wt％，Al 2O 3：1.3～2.5wt％，TiO 2：20.0～24.0wt％，V 2O 5：1.6～1.8wt％，Cr 2O 3：0.02～0.3wt％，S≤0.05wt％，P≤0.01wt％，余量为不可避免的杂质；其中，TFe为42.0～46.0wt.％。
  4. 根据权利要求3所述的一种含钛铁矿物中有价组元的分离富集方法，其特征在于，所述含钛铁矿物与硅铁合金的按照质量比100：12～35共混均匀。
  5. 根据权利要求2所述的一种含钛铁矿物中有价组元的分离富集方法，所述含钛铁矿物为钛铁矿，其包含的组分为：Fe 2O 3：15.1～17.5％，FeO：25.8～27.8％，TiO 2：43.4～45.6％,CaO：0.8～0.9％，SiO 2：4.6～5.6％，MgO：0.9～1.1％，Al 2O 3：1.0～1.3％，余量为不可避免的杂质。
  6. 根据权利要求5所述的一种含钛铁矿物中有价组元的分离富集方法，所述钛铁矿与硅铁合金粉是按照质量比100:12-21配料及共混。
  7. 根据权利要求1-6所述的一种含钛铁矿物中有价组元的分离富集方法，在电炉中的反应条件是：在惰性气氛保护下，加热至1250～1500℃并保温10～120分钟；所述惰性气氛为Ar、N 2、He中的一种或几种的混合气；更优选是在1300-1450℃，保温反应0.5-2h。
  8. 根据权利要求1-6所述的一种含钛铁矿物中有价组元的分离富集方法，所述硅铁合金粉的粒度在75μm以下的占90wt％以上，所述含钛铁矿物粒度在75μm以下的占70wt％以上。
  9. 根据权利要求1-6所述的一种含钛铁矿物中有价组元的分离富集方法，所述含钛铁矿物在还原反应之前，先在烘箱中进行烘干处理。
  10. 根据权利要求1-6所述的一种含钛铁矿物中有价组元的分离富集方法，所述磨成细粉是将电炉中冷却的反应产物磨成粒度在75μm以下占80wt％以上，磁选分离时磁选强度为120～240kA/m。
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3816099A (en) * 1971-03-01 1974-06-11 Ici Australia Ltd Process for producing metallic iron concentrates and titanium oxide concentrates from titaniferous ores
WO2006048283A1 (en) * 2004-11-03 2006-05-11 Outotec Oyj Process and plant for producing titania slag from ilmenite
CN102352423A (zh) * 2011-10-20 2012-02-15 攀枝花慧泰金属新材料有限公司 钒钛磁铁矿低温采选冶钛的方法
CN103008098A (zh) * 2012-12-25 2013-04-03 东北大学 一种钒钛磁铁矿固相强化还原-磁选分离的方法
CN104313310A (zh) * 2014-10-10 2015-01-28 昆明理工大学 一种添加硅铁粉提高钒钛磁铁精矿碳热还原速率的方法
CN105907948A (zh) * 2016-06-27 2016-08-31 东北大学 低品位含铬型钒钛磁铁矿金属化球团磁选分离的方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3816099A (en) * 1971-03-01 1974-06-11 Ici Australia Ltd Process for producing metallic iron concentrates and titanium oxide concentrates from titaniferous ores
WO2006048283A1 (en) * 2004-11-03 2006-05-11 Outotec Oyj Process and plant for producing titania slag from ilmenite
CN102352423A (zh) * 2011-10-20 2012-02-15 攀枝花慧泰金属新材料有限公司 钒钛磁铁矿低温采选冶钛的方法
CN103008098A (zh) * 2012-12-25 2013-04-03 东北大学 一种钒钛磁铁矿固相强化还原-磁选分离的方法
CN104313310A (zh) * 2014-10-10 2015-01-28 昆明理工大学 一种添加硅铁粉提高钒钛磁铁精矿碳热还原速率的方法
CN105907948A (zh) * 2016-06-27 2016-08-31 东北大学 低品位含铬型钒钛磁铁矿金属化球团磁选分离的方法

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