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Method for removing impurities from high-titanium slag

A high-titanium slag and reaction kettle technology, applied in the field of metallurgy, can solve the problems of good impurity removal effect, low energy consumption and high equipment requirements, and achieve the effect of good impurity removal effect.

Active Publication Date: 2020-09-25
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, and then the high-titanium slag and a nitric acid solution (mass ratio of 1:5) with a mass concentration of 20% are added to the reactor, and then oxygen is introduced into the reactor, and the temperature is raised to 160°C, and then keep warm for 2h under the condition of stirring at a rotation speed of 600r / min, wherein the total pressure in the reactor is 1.2Mpa, and the partial pressure of oxygen in the reactor is 0.5Mpa.

[0033] Then, filter the mixture in the reactor after cooling down, and wash the filtrate with water until the washing solution is neutral to obtain the high-titanium slag after removal of impurities.

[0034] Afterwards, the enriched filtered filtrate is evaporated and crystallized, and the obtained crystals are heated, and the nitrogen oxides obtained after heating are passed through the nitric acid absorption equipment for absorption, and a new nitric acid solution is obtained, an...

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 reactor, and then oxygen was introduced into the reactor, and the temperature was raised to 200 °C, and then keep warm for 1 h under the stirring condition with a rotating speed of 250r / min, wherein the total pressure in the reactor is 1.0Mpa, and the oxygen partial pressure in the reactor is 0.4Mpa.

[0040] Then, filter the mixture in the reactor after cooling down, and wash the filtrate with water until the washing solution is neutral to obtain the high-titanium slag after removal of impurities.

[0041] Afterwards, the enriched filtered filtrate is evaporated and crystallized, and the obtained crystals are heated, and the nitrogen oxides obtained after heating are passed through the nitric acid absorption equipment for absorption, and a new nitric acid solution is obtained, a...

Embodiment 2

[0042] The contents of titanium dioxide, aluminum oxide, magnesium oxide, and calcium oxide in the high-titanium slag before and after the impurity removal method in 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. The method comprises the following steps that step 1, the high-titanium slag with the particle size of 0.02 mm-0.1 mmand a nitric acid solution are added into a reaction kettle, oxygen is introduced into the reaction kettle, the materials are heated to over 130 DEG C, heat preservation is carried out for at least one hour under the stirring condition, the mixture is cooled, and a first material is obtained, wherein the mass concentration of the nitric acid solution is 10%-30%, the total pressure in the reactionkettle is 0.5 MPa-1.9 MPa, the oxygen partial pressure in the reaction kettle is 0.25 MPa or above, and the stirring rotating speed is 250 r / min-800 r / min; and step 2, the first material obtained instep 1 is filtered to obtain a filtered material and a filtrate, the filtered material is washed with water until the washing solution is neutral, and the impurity-removed high-titanium slag is obtained. By controlling the cooperation of various factors such as oxygen partial pressure, temperature, heat preservation time, nitric acid concentration, stirring rotating speed and the like in the reaction kettle, the impurity removal effect is good, and high-purity high-titanium slag can be obtained; and the method is low in energy consumption and low in equipment requirement.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular 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 through the physical production process. It is a high-content titanium dioxide enrichment obtained after melting and separating titanium dioxide and iron in titanium ore by heating and melting titanium ore in an electric furnace. High-titanium slag is neither a waste residue nor a by-product, but a high-quality raw material for the production of titanium tetrachloride, titanium dioxide and titanium sponge. Titanium slag is smelted from titanium concentrate. [0003] The chlorination method of titanium dioxide has become the main method of producing titanium dioxide at present due to its advantages of short process, low production cost and energy consumption, and less pollution of three wastes. 2 Only high-ti...

Claims

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Application Information

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Patent Type & Authority Applications(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