Beneficiation method of ilmenite

A beneficiation method and ilmenite technology, which are applied in the field of ilmenite raw ore beneficiation to prepare iron concentrate and ilmenite concentrate

Inactive Publication Date: 2014-04-02
GUANGXI KESHENGDA MACHINERY MFG
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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 iron-rich slag produced by electric furnace melting has complex components and mineral phases, and the content of calcium, aluminum and silicon is high. It is difficult to produce iron white powder economically and effectively by using the traditional sulfuric acid method and oxidation method

Method used

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  • Beneficiation method of ilmenite

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The treated ilmenite raw ore contains 32.16% iron and 12.11% iron dioxide, and a small amount of hydroxide feed and calcium oxide are added to the recycled treated liquid and washing solution to make the alkali concentration 450g / L, which is the same as 90% Mix vanadium-titanium magnetite with a particle size of less than 200 mesh, pressurize and heat up to 100°C, pretreat with oxygen for 4 hours, and flash cool to obtain pretreated pulp, filter and wash to obtain a solid intermediate product, and then ball mill. At the same time, under the magnetic field of 800 Oersted, the iron concentrate containing 59.31% iron and 4.01% iron dioxide was obtained by magnetic separation, and the iron concentrate containing 20.15% titanium dioxide was obtained at the same time. The recovery rate of iron was 82.23%, and that of titanium was 85.12%.

Embodiment 2

[0037] The treated ilmenite raw ore contains 32.16% iron and 12.11% iron dioxide, and a small amount of hydroxide feed and calcium oxide are added to the recycled treated liquid and washing solution to make the alkali concentration 500g / L, which is the same as 90% Mix vanadium-titanium magnetite with a particle size of less than 200 mesh, pressurize and heat up to 1200C, pretreat with oxygen for 4.5 hours, and flash cool to obtain a pretreated pulp, filter and wash to obtain a solid intermediate product, and then ball mill. At the same time, under a magnetic field of 900 Oersted, magnetic separation obtained iron concentrates containing 61.1% iron and 3.7% iron dioxide, and iron concentrates containing 20% ​​titanium dioxide. The recovery rate of iron was 78.5%, and that of titanium was 87.8%.

Embodiment 3

[0039] The treated ilmenite raw ore contains 38.32% iron and 10.35% iron dioxide, and a small amount of hydroxide feed and calcium oxide are added to the recycled treated liquid and washing solution to make the alkali concentration 550g / L, which is the same as 90% Mix vanadium-titanium magnetite with a particle size of less than 200 mesh, pressurize and heat up to 150°C, pretreat with oxygen for 5 hours, and flash cool to obtain a pretreated slurry, filter and wash to obtain a solid intermediate product, and then ball mill. At the same time, under the magnetic field of 1000 Oersted, the iron concentrate containing 62.31% iron and 3.89% iron dioxide was obtained by magnetic separation, and the iron concentrate containing 20.02% titanium dioxide was obtained at the same time. The recovery rate of iron was 79.98%, and that of titanium was 80.99%.

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Abstract

The invention discloses a beneficiation method of ilmenite and relates to the method for performing beneficiation on an ilmenite raw ore to prepare iron ore concentrate and ilmenite concentrate. The beneficiation method is characterized in that the beneficiation process comprises the following steps of (1) smashing the ilmenite raw ore; (2) grinding the ilmenite raw ore; (3) performing alkaline leaching pretreatment under conditions of water adding, temperature rising, oxygen adding and pressurization; (4) filtering ore pulp after the alkaline leaching pretreatment; (5) washing a filtered filter residue phase and performing ore grinding; (6) utilizing a washbox and performing magnetic separation to obtain the iron ore concentrate and the ilmenite concentrate. According to the method, dense symbiosis features of titanium and iron and isomorphism occurrence features of vanadium are damaged from the source of vanadium titanium magnetite ores by means of the treatment procedure, mineral transformation of the vanadium titanium magnetite is achieved, dissociation on lattice levels of titanium and iron is achieved, and the high-quality iron ore concentrate and the low-iron ilmenite concentrate can be obtained through a magnetic separation process and ore grinding. Alkali medium utilized by pretreatment can be recycled, therefore, influence of the process on the environment is small, and the beneficiation method has good application prospects.

Description

technical field [0001] The invention relates to a beneficiation method of ilmenite, which relates to a method for preparing iron concentrate and ilmenite 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 ilmenite occurs, iron occurs in titanomagnetite (nFeTi03.mFe304), and about 40% occurs in ilmenite ( In FeTiO3), the occurrence characteristics of minerals determine that the separation of titanium and iron cannot be realized from the source. In the existing iron separation process, titano-magnetite enters titanium concentrate, and ilmenite enters iron concentrate. The titanium in the iron concentrate enters the blast furnace slag (containing TiO2 as high as 22%) during the ironmaking process. Due to the formation of glass, TiO2 loses its cleanliness and cannot be economically recovered; Micron) iron ore recovery is dif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00
Inventor 林天祥徐国华杨艳颖
Owner GUANGXI KESHENGDA MACHINERY MFG
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