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Beneficiating method for ilmenite

A beneficiation method and ilmenite technology are applied in the field of ilmenite raw ore beneficiation to prepare ilmenite concentrate and iron ore concentrate, which can solve the complex composition and ore phase of titanium-rich slag, uneven temperature distribution in the furnace, calcium-magnesium-aluminum The problem of high silicon content can improve the operability, reduce the impact on the environment, and improve the recovery rate.

Active Publication Date: 2012-07-25
BEIJING GENERAL RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the inherent low volume ratio of the rotary hearth furnace, uneven temperature distribution in the furnace, difficulty in large-scale and other defects, in addition, the titanium-rich slag produced by electric furnace melting has complex components and mineral phases, and the content of calcium, magnesium, aluminum and silicon is high. It is difficult to produce titanium dioxide economically and effectively by using the traditional sulfuric acid method and chloride method

Method used

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  • Beneficiating method for ilmenite
  • Beneficiating method for ilmenite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The processed ilmenite ore contains 32.16% of iron and 12.11% of titanium dioxide. The recycled treated liquid and washing solution are filled with a small amount of potassium hydroxide and calcium oxide to make the alkali concentration 350g / L and 90% particle size The vanadium-titanium magnetite of less than 74μm is mixed, pressurized and heated to 290°C, pretreated with oxygen for 3 hours, flashed and cooled to obtain the pretreated pulp, filtered and washed to obtain the solid intermediate product, and then ball milled by a ball mill at 1200 Under the magnetic field of Oster, an iron concentrate containing 59.31% iron and 4.01% titanium dioxide was obtained, and a titanium concentrate containing 20.15% titanium dioxide was obtained. The recovery rate of iron is 82.23%, and the recovery rate of titanium is 85.12%.

Embodiment 2

[0031] The treated ilmenite ore contains 32.16% iron and 12.11% titanium dioxide. The recycled treated liquid and washing solution are filled with a small amount of potassium hydroxide and calcium oxide to make the alkali concentration 400g / L and 90% particle size The vanadium-titanium magnetite of less than 74μm is mixed, pressurized and heated to 250℃, pretreated with oxygen for 2.5 hours, flashed and cooled to obtain the pretreated slurry, filtered and washed to obtain the solid intermediate product, and then ball milled by a ball mill at 1500 Under the magnetic field of Oster, an iron concentrate containing 60.38% iron and 3.68% titanium dioxide was obtained, and a titanium concentrate containing 19.00% titanium dioxide was obtained. The recovery rate of iron is 80.38%, and the recovery rate of titanium is 86.62%.

Embodiment 3

[0033] The processed ilmenite ore contains 37.23% of iron and 11.28% of titanium dioxide. The recycled treated liquid and washing solution are filled with a small amount of potassium hydroxide and calcium oxide to make the alkali concentration 450g / L and 90% particle size The vanadium-titanium magnetite of less than 74μm is mixed, pressurized and heated to 220°C, pretreated with oxygen for 1.5 hours, flashed and cooled to obtain the pretreated slurry, filtered and washed to obtain the solid intermediate product, and then ball milled by a ball mill at 1000 Under the magnetic field of Oster, an iron concentrate containing 60.15% iron and 3.89% titanium dioxide was obtained, and a titanium concentrate containing 19.12% titanium dioxide was obtained. The recovery rate of iron is 85.38%, and the recovery rate of titanium is 81.78%.

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Abstract

The invention discloses a beneficiating method for ilmenite, relating to a method for preparing titanium concentrate and iron concentrate by beneficiating crude ilmenite. The method is characterized in that: a beneficiating process of the method orderly comprises the following steps of: (1) grinding the crude ilmenite; (2) performing alkaline leaching pretreatment under the conditions of heating,oxygenating and pressurizing; (3) filtering pulp which is subjected to the alkaline leaching pretreatment; (4) washing filter residue and grinding; and (5) performing magnetic separation to obtain the titanium concentrate and the iron concentrate. In the method provided by the invention, the characteristic of iron and titanium compact symbiosis and the isomorphism occurrence characteristic of vanadium are damaged from the source of vanadium titano-magnetite by adopting the pretreatment process, so that mineral transformation of the vanadium titano-magnetite is realized, dissociation on lattice layers of titanium and iron is realized, high-quality iron concentrate and titanium concentrate with lower iron content are obtained through grinding and the magnetic separation process, an alkalinemedium used in the pretreatment can be recycled, and the process has a small influence on environment and a bright application prospect.

Description

Technical field [0001] A method for beneficiating ilmenite relates to a method for preparing ilmenite concentrate and iron concentrate by beneficiation of ilmenite ore. Background technique [0002] Ilmenite reserves are quite abundant, and it is the main mineral resource in the world's titanium resources. Generally, about 57% of titanium in ilmenite is contained in ilmenite (nFeTiO3·mFe3O4), and about 40% is contained in ilmenite (FeTiO3). In ), the occurrence characteristics of minerals determine that the separation of titanium and iron cannot be achieved from the source. In the existing iron beneficiation process, titanomagnetite enters the iron concentrate, and ilmenite enters the titanium concentrate. The titanium in the iron concentrate enters the blast furnace slag (containing up to 22% of TiO2) during the ironmaking process. Due to the formation of a glass body, the TiO2 loses its activity and cannot be economically recovered; the titanium beneficiation process of ilmeni...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/00C22B34/12C21B5/00
CPCY02P10/20
Inventor 王成彦尹飞揭晓武陈永强阮书锋王振文杨永强居中军李强王军
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY