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A method for removing impurities from high titanium slag

A high-titanium slag and reaction kettle technology, applied in the metallurgical field, can solve the problems of low energy consumption, high equipment requirements, and low equipment requirements.

Active Publication Date: 2022-05-31
MEISHAN SHUNYING POWER BATTERY MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a method for removing impurities from high titanium slag in view of the technical problems of high energy consumption, high equipment requirements and poor effect of removing impurities in the prior art method for removing impurities from high titanium slag. The method has low energy consumption, low equipment requirements, and good impurity removal effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The high-titanium slag is crushed to a particle size of 0.02 mm, then the high-titanium slag and a nitric acid solution with a mass concentration of 20% (mass ratio of 1:5) are added to the reaction kettle, and then oxygen is introduced into the reaction kettle, and the temperature is raised to 20%. 160° C., and then kept for 2 hours under stirring conditions with a rotating speed of 600 r / min, wherein the total pressure in the reaction kettle was 1.2 Mpa, and the oxygen partial pressure in the reaction kettle was 0.5 Mpa.

[0033] Then, the mixture in the reaction kettle after cooling is filtered, and the filtrate is washed with water until the washing liquid is neutral to obtain high-titanium slag after impurity removal.

[0034] Then the enriched filtrate obtained by filtration is evaporated and crystallized, and the obtained crystals are subjected to heat treatment. The nitrogen oxides obtained after heating are passed into the nitric acid absorption equipment for ab...

Embodiment 2

[0039] The high-titanium slag was crushed to a particle size of 0.1 mm, and then the high-titanium slag and a nitric acid solution with a mass concentration of 15% (mass ratio of 1:3) were added to the reaction kettle, and then oxygen was introduced into the reaction kettle, and the temperature was raised to 200 °C. ℃, and then kept for 1 hour under the stirring condition of rotating speed of 250r / min, wherein, the total pressure in the reaction kettle was 1.0Mpa, and the oxygen partial pressure in the reaction kettle was 0.4Mpa.

[0040] Then, the mixture in the reaction kettle after cooling is filtered, and the filtrate is washed with water until the washing liquid is neutral to obtain high-titanium slag after impurity removal.

[0041] Then the enriched filtrate obtained by filtration is evaporated and crystallized, the obtained crystal is heated, and the nitrogen oxide obtained after heating is passed into the nitric acid absorption equipment for absorption, and a new nitri...

Embodiment 2

[0042] The contents of titanium dioxide, aluminum oxide, magnesium oxide, and calcium oxide in the high-titanium slag before and after impurity removal by the method of Example 2 were tested, and the test results are shown in Table 2.

[0043] Table 2 Test results of substance content in high titanium slag after impurity removal

[0044] Example 2 Titanium dioxide content (%) Alumina content (%) Magnesium oxide content (%) Calcium Oxide(%) High titanium slag before impurity removal 88.1 0.32 0.85 0.18 High titanium slag after impurity removal 96.2 0.07 0.28 0.06

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Abstract

The invention relates to a method for removing impurities from high-titanium slag, which comprises the following steps: Step 1, adding high-titanium slag with a particle size of 0.02 mm to 0.1 mm and nitric acid solution into a reaction kettle, feeding oxygen into the reaction kettle, and raising the temperature at the same time to above 130°C, then keep warm for at least 1h under stirring conditions, and cool down to obtain the first material; wherein, the mass concentration of the nitric acid solution is 10% to 30%; the total pressure in the reaction kettle is 0.5 Mpa to 1.9 Mpa , the partial pressure of oxygen in the reactor is above 0.25 MPa; the stirring speed is 250r / min~800r / min; step 2, the first material obtained in step 1 is filtered to obtain filtrate and filtrate, and the filtrate is Wash with water until the washing solution is neutral to obtain high-titanium slag after removal of impurities. The inventor controls the mutual cooperation of various factors such as oxygen partial pressure, temperature, holding time, nitric acid concentration, and stirring speed in the reactor, so that the impurity removal effect is good, and high-purity high-titanium slag can be obtained, and the method consumes less energy , Low equipment requirements.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and specifically relates to a method for removing impurities from high-titanium slag. Background technique [0002] High-titanium slag is commonly known as titanium ore enrichment formed by physical production process. The titanium ore is heated and melted by an electric furnace, and the titanium dioxide and iron in the titanium ore are melted and separated. The titanium dioxide enrichment is high. High-titanium slag is neither waste residue nor by-product, but a high-quality raw material for the production of titanium tetrachloride, titanium dioxide and titanium sponge products. Titanium slag is smelted from titanium concentrate. [0003] The production of titanium dioxide by chlorination has become the main method for producing titanium dioxide at present because of its advantages of short process, low production cost and energy consumption, and less pollution of three wastes. 2 Only high t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B34/12C22B1/00
CPCC22B34/1213C22B1/005Y02P10/20
Inventor 赵林金长浩但勇龙泽彬高波宋世杰
Owner MEISHAN SHUNYING POWER BATTERY MATERIALS CO LTD