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Method for extracting titanium dioxide from titanium-containing blast furnace slag

A technology of titanium dioxide and blast furnace slag, which is applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of resource waste, unstable titanium alloy composition, and substandard physical and mechanical properties, so as to improve product quality, yield, and treatment The process is simple and easy, and the effect of the titanium extraction process is optimized

Pending Publication Date: 2022-02-08
SICHUAN JUNHE ENVIRONMENTAL PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, method (1) has problems such as complex technological process, the introduction of beneficiation reagents is easy to generate solid waste, low quality of beneficiation products and difficulty in recycling, resulting in waste of resources; method (2) the composition of titanium alloy is unstable, and the physical and mechanical properties are not good. Up to the standard, limited market application; methods (3) and (4) have a long process flow, produce a large amount of waste liquid and waste residue, and have poor environmental benefits

Method used

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  • Method for extracting titanium dioxide from titanium-containing blast furnace slag
  • Method for extracting titanium dioxide from titanium-containing blast furnace slag

Examples

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Comparison scheme
Effect test

Embodiment 1

[0042] The steps of the method for extracting titanium dioxide from titanium-containing blast furnace slag are as follows:

[0043]A. Dry the titanium-containing blast furnace slag and grind it into powder: Take 1000g of blast furnace slag and dry it at 100-110°C for 2-4 hours to constant weight, grind it to -200 mesh (2 The content is 21.318%;

[0044] Table 1 The main chemical composition of Leshan Desheng blast furnace slag (mass percentage%)

[0045]

[0046] B. First add quantitative sulfuric acid to the blast furnace slag powder and stir evenly, then add quantitative hydrogen peroxide and let it stand in the dark for 1 hour to obtain the soaked mixture; wherein, the mass ratio of blast furnace slag powder: sulfuric acid: hydrogen peroxide is 1:0.9 : 0.55, sulfuric acid concentration 98%, hydrogen peroxide concentration 30%;

[0047] C. Separating the soaked mixture from solid to liquid, and washing the filter cake with hydrogen peroxide to obtain a hydrogen peroxide ...

Embodiment 2

[0050] Same as Example 1, the only difference is that the concentration of hydrogen peroxide used is 35%; in step B, the mass ratio of blast furnace slag powder: sulfuric acid: hydrogen peroxide is 1: 0.9: 0.6; in step D, 162.05 g of titanium dioxide, TiO 2 The recovery rate was 76.01%.

Embodiment 3

[0052] Same as Example 1, the only difference is that the concentration of hydrogen peroxide used is 25%; in step B, the mass ratio of blast furnace slag powder: sulfuric acid: hydrogen peroxide is 1: 0.9: 0.5; in step D, 158.02 g of titanium dioxide, TiO 2 The recovery rate was 74.12%.

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Abstract

The invention discloses a method for extracting titanium dioxide from titanium-containing blast furnace slag, the method comprises the following steps: A, drying the titanium-containing blast furnace slag, and grinding into powder to obtain blast furnace slag powder; b, firstly adding sulfuric acid into the blast furnace slag powder, uniformly stirring, then adding hydrogen peroxide, standing and soaking to obtain a soaked mixture; c, carrying out solid-liquid separation on the soaked mixture, and washing a solid phase with hydrogen peroxide to obtain a hydrogen peroxide complexing solution; and D, decomposing the hydrogen peroxide complexing solution to obtain titanium dioxide. The method is low in economic cost and short in process, the obtained product is high in purity, high-value utilization of the titanium-containing blast furnace slag is achieved, an existing titanium extraction process is improved and optimized, and economic benefits and social benefits are well developed.

Description

technical field [0001] The invention relates to the field of industrial waste slag treatment in iron and steel and metallurgical industries, in particular to a method for extracting titanium dioxide from titanium-containing blast furnace slag. Background technique [0002] Vanadium-titanium magnetite is an important mineral resource in my country. Vanadium-titanium is listed as an important national strategic resource, and its economic value is increasing year by year. The associated components in vanadium-titanium magnetite are difficult to completely separate and enrich in the process of beneficiation and smelting. The total recovery rate of vanadium and titanium is only 30-40%, and most of them are lost in tailings and smelting slag. Iron concentrate generally contains about 10% titanium dioxide, and most of them enter blast furnace slag after blast furnace ironmaking. The content of titanium dioxide in blast furnace slag Generally 21-25%, also known as high-titanium blast ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053
CPCC01G23/053
Inventor 罗红莹王攀罗培强彭青松
Owner SICHUAN JUNHE ENVIRONMENTAL PROTECTION
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