Beneficiating method for ilmenite

A beneficiation method and ilmenite technology, which is applied in the field of ilmenite raw ore beneficiation to prepare titanium concentrate and iron concentrate, can solve the problem of complex components and mineral phases of titanium-rich slag, uneven temperature distribution in the furnace, calcium magnesium aluminum Solve problems such as high silicon content, achieve the effect of improving operability, reducing environmental impact, and improving recovery rate

Active Publication Date: 2011-09-14
BEIJING GENERAL RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

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Effect test

Embodiment 1

[0029] The treated ilmenite raw ore contains 32.16% iron and 12.11% titanium dioxide. A small amount of potassium hydroxide and calcium oxide are added to the recycled treated liquid and washing solution to make the alkali concentration 350g / L and 90% particle size Mix vanadium-titanium magnetite smaller than 74μm, pressurize and heat up to 290°C, pretreat with oxygen for 3 hours, and flash cool to obtain pretreated pulp, filter and wash to obtain solid intermediate products, and then ball mill in a ball mill. Magnetic separation under Oster's magnetic field yielded iron concentrate containing 59.31% iron and 4.01% titanium dioxide, and titanium concentrate containing 20.15% titanium dioxide. The recovery rate of iron was 82.23%, and the recovery rate of titanium was 85.12%.

Embodiment 2

[0031] The treated ilmenite raw ore contains 32.16% iron and 12.11% titanium dioxide. A small amount of potassium hydroxide and calcium oxide are added to the recycled treated liquid and washing solution to make the alkali concentration 400g / L and 90% particle size Mix vanadium-titanium magnetite smaller than 74μm, pressurize and heat up to 250°C, pretreat with oxygen for 2.5 hours, and flash cool to obtain a pretreated slurry, filter and wash to obtain a solid intermediate product, and then ball mill in a ball mill. Magnetic separation under Oster's magnetic field yielded iron concentrate containing 60.38% iron and 3.68% titanium dioxide, and at the same time obtained titanium concentrate containing 19.00% titanium dioxide. The recovery rate of iron was 80.38% and that of titanium was 86.62%.

Embodiment 3

[0033] The treated ilmenite raw ore contains 37.23% iron and 11.28% titanium dioxide. A small amount of potassium hydroxide and calcium oxide are added to the recycled treated liquid and washing solution to make the alkali concentration 450g / L and 90% particle size Mix vanadium-titanium magnetite smaller than 74μm, pressurize and heat up to 220°C, pretreat with oxygen for 1.5 hours, and flash cool to obtain pretreated pulp, filter and wash to obtain a solid intermediate product, and then ball mill in a ball mill. Magnetic separation under Oster's magnetic field yielded iron concentrate containing 60.15% iron and 3.89% titanium dioxide, and at the same time obtained titanium concentrate containing 19.12% titanium dioxide. The recovery rate of iron was 85.38% and that of titanium was 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 alkaline medium 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] The invention relates to an ilmenite beneficiation method, which relates to a method for preparing ilmenite concentrate and iron concentrate by beneficiating raw ilmenite ore. Background technique [0002] Ilmenite reserves are quite rich, and it is the main mineral resource in the world's titanium resources. Generally, about 57% of titanium in ilmenite occurs in titanomagnetite (nFeTiO3 mFe3O4), and about 40% occurs in ilmenite (FeTiO3 ), the occurrence characteristics of the minerals determine that the separation of titanium and iron cannot be achieved from the source. In the existing iron separation process, titano-magnetite enters into iron concentrate, and ilmenite enters into titanium concentrate. Titanium in iron concentrate enters into blast furnace slag (containing TiO2 as high as 22% or more) during the ironmaking process. Due to the formation of glass body, TiO2 loses its activity and cannot be economically recovered; ) It is difficult to ...

Claims

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Application Information

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Patent Type & Authority Applications(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
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