Method for preparing grade-adjustable potassium fluotitanate through using high-silicon-titanium iron ore

A technology of potassium fluorotitanate and ilmenite, which is applied in chemical instruments and methods, titanium compounds, inorganic chemistry, etc., to achieve the effects of saving production costs, simple operation and easy control, and simple preparation process

Inactive Publication Date: 2012-06-27
HUNAN RES INST FOR NONFERROUS METALS
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0008] Aiming at the deficiencies of the prior art, the present invention provides a method for preparing grade-adjustable potassium fluorotitanate from high-silicon ilmenite, which can directly use iron ore with high silicon-titanium content as raw material, and the raw material does not Pretreatment is required for direct use in production, and hydrofluoric acid does not need to be refined and can be used directly; and the impurity silicon is processed into high-purity potassium fluorosilicate, which can be used in the market without causing waste; in addition, through Potassium fluorotitanate is prepared by the method of the present invention, and the grade of potassium fluorotitanate can be adjusted to save production cost and meet the needs of different customers

Method used

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  • Method for preparing grade-adjustable potassium fluotitanate through using high-silicon-titanium iron ore
  • Method for preparing grade-adjustable potassium fluotitanate through using high-silicon-titanium iron ore

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Effect test

Embodiment 1

[0056] Purification and removal of silicon: 3m 3 Add 0.44m3 (1.6 times the theoretical value) of potassium chloride solution with a concentration of 259g / L into the mixed leaching solution, add time for 1.8h, let stand for 3h, and filter;

[0057] Output: purification liquid 3.52m 3 , containing 141.21g / L of titanium dioxide and 1.12g / L of silicon dioxide,

[0058] Potassium fluorosilicate: 92.03kg, purity 98.7%;

[0059] Crystallization: The purification solution is 3.52m 3 Add 4.35m of potassium chloride solution with a concentration of 259g / L 3 (1.2 times the theoretical value), adding time 2h, standing for 3h, filtering;

[0060] Output: potassium fluorotitanate: 1441 kg, purity 99.7%, silicon dioxide content 0.101% (Si0.05%).

Embodiment 2

[0062] Purification and removal of silicon: 3m 3 Add 0.45m potassium chloride solution with a concentration of 259g / L to the mixed leachate 3 (1.65 times of theoretical value), adding time 1.9h, standing for 2.83h, filtering,

[0063] Output: purification liquid 3.56m 3 , containing titanium dioxide 140.79g / L, containing silicon dioxide 0.88g / L, potassium fluorosilicate: 93.44kg, purity 99.0%;

[0064] Crystallization: The purification solution is 3.56m 3 Add 4.25m of potassium chloride solution with a concentration of 259g / L 3 (1.18 times the theoretical value), adding time 2.2h, standing for 3.5h, filtering;

[0065] Yield: potassium fluotitanate: 1438.85 kg, purity 99.8%, silicon dioxide content 0.09% (Si0.042%).

[0066] 4. Production of secondary products:

Embodiment 3

[0068] Purification and removal of silicon: 3m 3 Add 0.39m potassium chloride solution with a concentration of 259g / L to the mixed leachate 3 (1.4 times of theoretical value), adding time 1.6h, standing for 3h, filtering,

[0069] Output: purification liquid 3.44m 3 , containing titanium dioxide 146.81g / L, containing silicon dioxide 1.82g / L, potassium fluorosilicate: 84.08kg, purity 98.6%;

[0070] Crystallization: The purification solution is 3.44m 3 Add 4.35m of potassium chloride solution with a concentration of 259g / L 3 (1.2 times the theoretical value), adding time 2.1h, standing for 3h, filtering;

[0071] Output: Potassium fluotitanate: 1466.44kg, purity 98.6%, silicon dioxide content 0.42% (Si0.20%).

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Abstract

The invention which belongs to a metallurgical technology concretely provides a method for preparing grade-adjustable potassium fluotitanate through using high-silicon-titanium iron ore. The method comprises three steps of leaching, silicon removal and potassium fluotitanate synthesis. According to the method, the iron ore with high contents of silicon and titanium is directly used as a raw material, the raw material can be directly used for production without preprocessing, and hydrofluoric acid can be directly used without refining; the impurity silicon is processed into high purity potassium fluosilicate, and potassium fluosilicate can be sold in the market and causes no wastes; and additionally, the potassium fluotitanate prepared through the method of the invention, which has the characteristics of adjustable grade and production cost saving, can satisfy demands of different clients.

Description

technical field [0001] The invention belongs to metallurgical technology, and specifically provides a method for preparing grade-adjustable potassium fluorotitanate by using high-silicon ilmenite. Background technique [0002] At present, most of the raw materials used in the production of potassium fluorotitanate are ilmenite and hydrofluoric acid. The most important indicators of potassium fluorotitanate are the grade of potassium fluorotitanate and the content of impurity silicon. Therefore, ilmenite and hydrofluoric acid used as raw materials Acid indicators are important, especially silicon content in ilmenite and hydrofluoric acid. The ilmenite used in the current process requires less than 0.8% silicon, and hydrofluoric acid needs to be refined, so that the silicon content of hydrofluoric acid is less than 0.5%, and some companies even require that the silicon content of hydrofluoric acid is less than 0.3%, and the leaching solution is directly Production of Potassiu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/00
Inventor 翁毅王志坚郑思温吴建宏朱贤徐涂文
Owner HUNAN RES INST FOR NONFERROUS METALS
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