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High-purity artificial rutile and preparation method thereof

An artificial rutile, high-purity technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of low purity of artificial rutile, low calcium and magnesium content of ilmenite, and long time-consuming corrosion stage, etc., to achieve high cost performance, The preparation method is simple and the cost is low

Pending Publication Date: 2021-11-02
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing acid leaching method and reduction corrosion method have high energy consumption in the pretreatment step, and the cost is large, and the corrosion stage takes a long time. Sulfuric acid leaching requires low calcium and magnesium content of ilmenite, high requirements for raw materials, and The purity of the prepared artificial rutile is not high

Method used

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Examples

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preparation example Construction

[0026] A method for preparing high-purity artificial rutile, comprising the steps of:

[0027] Step S1, uniformly mixing the titanium concentrate and hydrochloric acid solution to form a mixture A;

[0028] Step S2, adding a crystal improving aid to mixture A to form mixture B;

[0029] Step S3, adding the mixture B into the reaction kettle, introducing chlorine gas, and after reacting under preset conditions, suction filtration to obtain filtrate A, freezing the filtrate A and suction filtration again to obtain filtrate B;

[0030] Step S4, after the filtrate B is hydrolyzed, the filter residue is obtained by suction filtration, and the filter residue is pickled, washed with water and calcined to obtain high-purity artificial rutile.

[0031] Specifically, titanium concentrate refers to concentrates extracted from ilmenite or titanomagnetite, wherein the grade of titanium dioxide is above 45%, and the higher the grade of titanium dioxide in titanium concentrate, the prepared...

Embodiment 1

[0050] The present embodiment provides a kind of preparation method of high-purity artificial rutile, comprises the steps:

[0051] Step S1, weighing a certain amount of titanium concentrate and hydrochloric acid solution, the solid-to-liquid ratio of titanium concentrate and hydrochloric acid solution is 1:3.2, mixing evenly to form mixture A;

[0052] Step S2, adding a crystal improvement aid to the uniformly mixed mixture A, wherein the crystal improvement aid is 10% of the mass of the titanium concentrate, and after uniform mixing, a mixture B is formed;

[0053] Step S3: Add the mixture B to the reaction kettle, feed 0.2kg of chlorine gas, and heat for leaching. The leaching temperature is 80°C, the stirring speed is 350r / min, and the leaching time is 8 hours. After cooling to room temperature and equalizing the air pressure, take out the slurry material, suction filtered to obtain filtrate A, and the filtrate A was frozen at -20°C for 4.5 hours, then filtered while cold ...

Embodiment 2

[0057] The present embodiment provides a kind of preparation method of high-purity artificial rutile, comprises the steps:

[0058] Step S1, weighing a certain amount of titanium concentrate and hydrochloric acid solution, the solid-to-liquid ratio of titanium concentrate and hydrochloric acid solution is 1:3, mixing evenly to form mixture A;

[0059] Step S2, adding a crystal improving aid to the uniformly mixed mixture A, wherein the crystal improving aid is 9% of the mass of the titanium concentrate, and after mixing uniformly, a mixture B is formed;

[0060] Step S3: Add the mixture B into the reaction kettle, feed 0.1kg of chlorine gas, and heat leaching. The leaching temperature is 70°C, the stirring speed is 350r / min, and the leaching time is 10 hours. After cooling to room temperature and equilibrating the air pressure, take out the slurry material, suction filtered to obtain filtrate A, and the filtrate A was frozen at -25°C for 4 hours, then filtered while cold to ob...

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Abstract

The invention provides high-purity artificial rutile and a preparation method thereof, and relates to the technical field of mineral material preparation. The preparation method comprises the following steps: S1, uniformly mixing titanium concentrate and a hydrochloric acid solution to form a mixture A; s2, adding a crystallization improving aid into the mixture A to form a mixture B; s3, adding the mixture B into a reaction kettle, introducing chlorine, reacting under a preset condition, performing suction filtration to obtain filtrate A, freezing the filtrate A, and performing suction filtration again to obtain filtrate B; and S4, carrying out hydrolysis reaction on the filtrate B, carrying out suction filtration to obtain filter residues, and carrying out acid pickling, water washing and calcination on the filter residues to obtain the high-purity artificial rutile. The leaching rate and the purity of the rutile are improved by introducing chlorine and adding a crystallization auxiliary agent, and a rotary kiln reduction-oxidation step with high energy consumption and high investment amount can be omitted, so that the high-purity artificial rutile is obtained.

Description

technical field [0001] The invention relates to the technical field of mineral material preparation, in particular to a high-purity artificial rutile and a preparation method thereof. Background technique [0002] The main component of rutile is titanium dioxide, which is divided into natural rutile and artificial rutile. The composition and chemical properties of artificial rutile are the same as those of natural rutile. It is an ideal substitute for natural rutile. The content of titanium dioxide is generally between 91% and 95%. It is the main raw material for the production of titanium dioxide chloride and titanium sponge. [0003] At present, the mainstream methods of industrial production of artificial rutile at home and abroad are acid leaching and reduction rusting. Both methods require weak oxidation roasting or strong oxidation pretreatment of ilmenite in a rotary kiln, and then rust or acid corrosion. dipping, and finally separated to obtain artificial rutile. H...

Claims

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Application Information

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IPC IPC(8): C01G23/053
CPCC01G23/053C01P2006/80
Inventor 黄齐茂屈泓佑
Owner WUHAN INSTITUTE OF TECHNOLOGY
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