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High titanium hydrochloric acid leaching slag, new application thereof and preparation method of titanium pigment

A high-titanium hydrochloric acid and hydrochloric acid leaching technology, which is applied in the direction of chemical instruments and methods, titanium compounds, titanium dioxide, etc., can solve the problems of hydrochloric acid leaching method particle size refinement, etc., to reduce the number of washing times, reduce the production of ferrous sulfate, and reduce emissions Effect

Inactive Publication Date: 2011-01-05
攀枝花坤泽投资有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For many years, technicians in the field of titanium dioxide production and research have been working on solving the problems of particle size refinement and leaching effect of the hydrochloric acid leaching method for the ilmenite in the Panxi area, all in order to improve the quality of artificial rutile and benefit chlorine. The chemical method is used to produce titanium dioxide, but no one has ever used the intermediate product of the hydrochloric acid leaching method, that is, the titanium slag obtained through acid leaching, filtering, and washing (this invention claims that the titanium slag is a high-titanium hydrochloric acid leaching residue), directly with high-titanium hydrochloric acid. The leaching slag is used as a raw material for the production of titanium dioxide, and no one has applied the high-titanium hydrochloric acid leaching slag to the sulfuric acid method to prepare titanium dioxide.

Method used

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  • High titanium hydrochloric acid leaching slag, new application thereof and preparation method of titanium pigment
  • High titanium hydrochloric acid leaching slag, new application thereof and preparation method of titanium pigment
  • High titanium hydrochloric acid leaching slag, new application thereof and preparation method of titanium pigment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1 Preparation of high titanium hydrochloric acid leaching residue by directly leaching ilmenite with hydrochloric acid

[0043] 1. Measure 45 liters of 20% hydrochloric acid and pour it into a 50 liter enamel-lined reaction tank;

[0044] 2. Weigh 15 kg of titanium concentrate, pour it into the reaction tank, seal it, and start the agitator;

[0045] 3. Rapid heating to about 140°C;

[0046] After 4.5 hours, stop heating and cool down to 80°C naturally;

[0047] 5. Rapidly filter the materials in the 3-liter reaction tank. Filtration is formed by connecting a Buchner flask to a vacuum pump;

[0048] 6. Wash the filter cake three times with 3 liters of deionized water. Dry at 110°C for 6 hours to obtain high titanium hydrochloric acid leaching residue. The water content of the obtained leaching residue is less than 1%.

[0049] The chemical composition of the high titanium hydrochloric acid leaching residue was analyzed, and the results are shown in Table 1...

Embodiment 2

[0052] Example 2 Preparation of high titanium hydrochloric acid leaching slag by directly leaching titanium concentrate with hydrochloric acid

[0053] 1. Measure 45 liters of 20% hydrochloric acid and pour it into a 50 liter enamel-lined reaction tank.

[0054] 2. Weigh 15 kg of titanium concentrate, pour it into the reaction tank, seal it, and start the agitator.

[0055] 3. Rapidly heat to about 120°C.

[0056] After 4 or 5 hours, stop heating and cool naturally to 80°C.

[0057] 5. Rapidly filter the materials in the 3-liter reaction tank. Filtration is accomplished through a Buchner flask connected to a vacuum pump.

[0058] 6. Wash the filter cake three times with 3 liters of deionized water. Dry at 110°C for 6 hours to obtain high titanium hydrochloric acid leaching residue. The water content of the obtained leaching residue is <1%.

[0059] The chemical composition of the high titanium hydrochloric acid leaching residue was analyzed, and the results are shown in ...

Embodiment 3

[0062] Example 3 Preparation of high titanium hydrochloric acid leaching slag by directly leaching titanium concentrate with hydrochloric acid

[0063] 1. Measure 45 liters of 20% hydrochloric acid and pour it into a 50 liter enamel-lined reaction tank.

[0064] 2. Weigh 15 kg of titanium concentrate, pour it into the reaction tank, seal it, and start the agitator.

[0065] 3. Rapidly heat to about 130°C. After 7 hours, the heating was stopped, and it was naturally cooled to 80°C.

[0066] 4. The materials in the reaction tank are rapidly filtered batch by batch. The filtration device is formed by connecting a Buchner flask with a vacuum pump.

[0067] 5. Wash the filter cake three times with 3 liters of tap water for each filtration. Dry at 110° C. for 6 hours to obtain high titanium hydrochloric acid leaching residue. The water content of the obtained leaching residue is <1%.

[0068] The chemical composition of the high titanium hydrochloric acid leaching residue was ...

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Abstract

The invention belongs to the field of titanium pigment production, particularly relates to a high titanium hydrochloric acid leaching slag obtained by processing ilmenites by a hydrochloric acid leaching method, new application thereof and a preparation method of a titanium pigment. The invention provides the high titanium hydrochloric acid leaching slag suitable for preparing the titanium pigment by using a sulfuric acid method, and the leaching slag can be used as a raw material for preparing the titanium pigment by using the sulfuric acid method. When the titanium pigment is prepared from the high titanium hydrochloric acid leaching slag, granule ilmenites in the west area of Panzhihua can be effectively utilized with utilization rate of almost 100 percent, a titanium liquid with an ultralow ferrotitanium rate can be obtained, the production capacity of acidolysis equipment can be doubled, meanwhile two stages of freezing deferrization and titanium liquid concentration with large amount of energy consumption can be saved, the washing frequency of metatitanic acid is greatly reduced, the discharge of acidic waste water is reduced and the generation of ferrous sulfate can be decreased. The method provides novel and better material selections for preparing the titanium pigment by using the sulfuric acid method.

Description

technical field [0001] The invention belongs to the field of titanium dioxide production, and in particular relates to high-titanium hydrochloric acid leaching slag obtained by leaching ilmenite with hydrochloric acid, its new application and a preparation method of titanium dioxide. Background technique [0002] As an important strategic material, titanium occupies an extremely important position in the world economy. China is one of the few countries in the world rich in titanium reserves. The reserves of titanium resources in Panxi area account for more than 90% of the national reserves. The ilmenite in this area is mainly symbiotic rock ore with low grade of titanium dioxide. The grade of titanium dioxide in titanium concentrate is generally around 46-47wt%. Secondly, the Ilmenite (also known as titanium concentrate) has a high content of calcium and magnesium impurities, and the sum of calcium oxide and magnesium oxide is generally about 5-7%; in addition, fine particle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B09B3/00
CPCC22B34/1213C22B3/10C09C1/3607C22B7/007C01G23/0536C01G23/053C01P2006/10C22B34/1259C22B34/1245C01G23/047C01P2006/80Y02P10/20Y02W30/50
Inventor 陈树忠王鲍勃政琦
Owner 攀枝花坤泽投资有限公司
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