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Method for preparing titanium dioxide and iron oxide by using fluoride purifying titanium-iron material

A technology of titanium dioxide and ferro-titanium, which is applied in the field of preparation of titanium dioxide and iron oxide, can solve the problem of low quality of titanium-containing elements, and achieve the effects of effective control of product quality, low cost and easy operation

Inactive Publication Date: 2019-04-16
HUNAN KUNTAI METALLURGICAL ENG TECHCO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing technology only pays attention to the utilization of titanium in ilmenite and ignores the utilization of iron, and the quality of the obtained titanium-containing products is not high

Method used

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  • Method for preparing titanium dioxide and iron oxide by using fluoride purifying titanium-iron material
  • Method for preparing titanium dioxide and iron oxide by using fluoride purifying titanium-iron material
  • Method for preparing titanium dioxide and iron oxide by using fluoride purifying titanium-iron material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] The composition of ilmenite is: FeTiO 3 90wt%; CaO 1wt%; MgO 4wt%, the rest is impurities.

[0063] Mix ammonium fluoride aqueous solution with a mass concentration of 40% and ilmenite at a solid-to-liquid ratio of 0.5:1 at 80 rpm and then heat at 50°C for 0.5 hours to obtain a mixture;

[0064] Using ammonia water to adjust the pH value of the mixture to 6.5 to obtain the first precipitate;

[0065] The first precipitate is separated by pressing and filtering with a membrane filter, and the pH value of the remaining solution is adjusted to 8.5 with ammonia water to obtain a second precipitate, which is separated by pressing and filtering with a membrane filter.

[0066] The first precipitate is hydrolyzed at 500°C at high temperature, and the product after high temperature hydrolysis is mixed with ammonium stearate for impurity removal. Ammonium stearate absorbs Ca and Mg ions and floats on the upper layer to form a suspended solid. Pour the upper layer solution to r...

Embodiment 2

[0073] The composition of ilmenite is: FeTiO 3 92wt%; CaO 2wt%; MgO 4wt%, and the balance is impurities.

[0074] Mix ammonium fluoride aqueous solution with a mass concentration of 50% and ilmenite at a solid-to-liquid ratio of 1:1 at 100 rpm, and then heat at 75°C for 1.5 hours to obtain a mixture;

[0075] Using ammonia water to adjust the pH value of the mixture to 7 to obtain the first precipitate;

[0076] The first precipitate is separated by pressing and filtering with a membrane filter, the pH of the remaining solution is adjusted to 9 with ammonia water, and the second precipitate is separated by pressing and filtering with a membrane filter.

[0077] The first precipitate was hydrolyzed at 700°C at high temperature, and the product after high temperature hydrolysis was mixed with ammonium stearate to remove impurities. Ammonium stearate adsorbed Ca and Mg ions and floated on the upper layer to form a suspended solid, and poured the upper layer solution to remove t...

Embodiment 3

[0083] The composition of ilmenite is: FeTiO 3 94wt%; CaO 3wt%; MgO 2wt%, the balance is impurities.

[0084] Mix ammonium fluoride aqueous solution with a mass concentration of 60% and ilmenite at a solid-to-liquid ratio of 2:1 at 120 rpm, and then heat at 100°C for 4 hours to obtain a mixture;

[0085] Using ammonia water to adjust the pH value of the mixture to 7.5 to obtain the first precipitate;

[0086] The first precipitate is separated by pressing and filtering with a membrane filter, the pH of the remaining solution is adjusted to 9.5 with ammonia water, and the second precipitate is separated by pressing and filtering with a membrane filter.

[0087] The first precipitate is hydrolyzed at 900°C at high temperature, and the product after high temperature hydrolysis is mixed with ammonium stearate for impurity removal. Ammonium stearate absorbs Ca and Mg ions and floats on the upper layer to form a suspension, and the upper layer solution is poured to remove the susp...

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Abstract

The invention provides a method for preparing titanium dioxide and iron oxide by using a fluoride purifying titanium-iron material. The method comprises the steps of mixing and heating a titanium-ironmaterial and a fluorine ammonium compound solution to obtain a mixture, wherein the fluorine ammonium compound is an ammonium fluoride or ammonium hydrogen fluoride; regulating the primary pH of themixture to obtain a first precipitate; separating the first precipitate and then regulating the secondary pH of the residual material to obtain a second precipitate; hydrolyzing the first precipitateat high temperature to obtain Fe2O3; roasting the second precipitate to obtain TiO2. By adopting the method, titanium and iron elements in the titanium-iron material can be thoroughly separated, and high-quality TiO2 and Fe2O3 pigment products are respectively obtained. The method is especially suitable for purifying and purifying treatment of high-calcium-magnesium titanium iron resources in a Panxi area (components and their analogs), materials with low calcium and magnesium impurity contents are obtained, namely titanium-rich materials, and titanium dioxide or titanium metal is produced fora subsequent sulfuric acid method and a chlorination method.

Description

technical field [0001] The invention relates to the technical field of ferrotitanium, in particular to a method for preparing titanium dioxide and iron oxide by using fluoride to purify ferrotitanium materials. Background technique [0002] Ilmenite is an oxide mineral of iron and titanium, trigonal crystal system, hardness 5-6, density 4.4-5g / cm 3 , the composition is FeTiO 3 , its theoretical composition is: FeO 47.36%, TiO 2 52.64%, is the main ore for extracting titanium and titanium dioxide. my country is rich in ilmenite resources, ranking fifth in the world in reserves, and the Panxi region is the largest ilmenite resource base in my country. Ilmenite produced in ultrabasic rocks and basic rocks has high MgO content and basically does not contain Nb and Ta; ilmenite in alkaline rocks has high MnO content and contains Nb and Ta; Ilmenite in acidic rocks has high content of FeO and MnO, and relatively high content of Nb and Ta. [0003] More than 90% of the world'...

Claims

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Application Information

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IPC IPC(8): C01G23/047C01G49/06B82Y30/00
CPCB82Y30/00C01G23/047C01G49/06C01P2002/72C01P2004/03C01P2004/62C01P2004/64C01P2006/80
Inventor 王光华胡晓鸿王海华
Owner HUNAN KUNTAI METALLURGICAL ENG TECHCO LTD
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