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Method for preparing trivalent titanium by hydrolytic scale

A technology of trivalent titanium and metatitanic acid, which is applied in the direction of chemical instruments and methods, titanium compounds, and improvement of process efficiency. Yield, the effect of adding economic benefits

Pending Publication Date: 2020-07-10
SICHUAN LOMON TITANIUM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the hydrolyzed scale is dried and pulverized, because of the characteristics of the hydrolyzed scale, after drying, the hardness is extremely high, it is difficult to pulverize, and the pulverization fineness is also difficult to improve. Therefore, this method has the disadvantages of high recovery cost, long process flow, titanium Practical problems such as low recovery rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 150g of hydrolyzed scale, add 150g of zirconium beads with a diameter of 10mm, add 50mL of water, ball mill for 80min, sieve through a mesh of 325 mesh or above, rinse the suspension of the undersieve (without adding crystal seeds), and remove iron and other Colored impurities, rinsing includes: based on the mass of titanium dioxide, beating the depolymerized material to a concentration of 300g / L, first adding sulfuric acid to control the sulfuric acid concentration of the rinsing slurry to 80g / L, then adding trivalent titanium to control the rinsing slurry 3 The valence titanium concentration is 1.5g / L, and then washed with water, and the amount of washing water is controlled to be 10 times the mass of titanium dioxide to obtain metatitanic acid. Based on the mass of titanium dioxide, the metatitanic acid is beaten to a concentration of 300g / L. The mass ratio of titanium dioxide in the feed is 5: 1, adding concentrated sulfuric acid to acid-dissolve, after acid-di...

Embodiment 2

[0025] Weigh 200g of hydrolyzed scale, add 150g of zirconium beads with a diameter of 10mm, add 100mL of water, ball mill for 100min, sieve through 325 mesh and above, and rinse the suspension of the undersieve (without adding crystal seeds) to remove iron and other Colored impurities, rinsing includes: based on the mass of titanium dioxide, beat the depolymerized material to a concentration of 350g / L, first add sulfuric acid, control the sulfuric acid concentration of the rinsing slurry to 100g / L, then add trivalent titanium, control the rinsing slurry three The concentration of valence titanium is 2g / L, and then washed with water, the amount of washing water is controlled to be 12 times the mass of titanium dioxide to obtain metatitanic acid, and concentrated sulfuric acid is added according to the mass ratio of concentrated sulfuric acid to titanium dioxide in the slurry 4:1, acid-dissolved, acid-dissolved Afterwards, aluminum powder is added for reduction, and the amount of...

Embodiment 3

[0027] Weigh 300g of hydrolyzed scale, add 150g of zirconium beads with a diameter of 10mm, add 150mL of water, ball mill for 120min, sieve through 325 mesh and above, and rinse the suspension of the undersieve (without adding crystal seeds) to remove iron and other Colored impurities, rinsing includes: based on the mass of titanium dioxide, beat the depolymerized material to a concentration of 350g / L, first add sulfuric acid, control the sulfuric acid concentration of the rinsing slurry to 150g / L, then add trivalent titanium, control the rinsing slurry three The concentration of valence titanium is 3g / L, and then washed with water, and the amount of washing water is controlled to be 15 times the mass of titanium dioxide to obtain metatitanic acid. Based on the mass of titanium dioxide, the metatitanic acid is beaten to a concentration of 350g / L. According to the concentration of concentrated sulfuric acid and slurry The mass ratio of titanium dioxide in the medium is 5.5:1. Ad...

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Abstract

The invention belongs to the technical field of titanium dioxide production, and discloses a method for preparing trivalent titanium by hydrolytic scale. The method comprises the following steps: 1) depolymerization: mixing the hydrolytic scale with a ball milling medium, adding water, carrying out wet ball milling, and filtering by using a sieve of 325 meshes or more to obtain a depolymerized material; (2) purification: rinsing the depolymerized material to obtain metatitanic acid, and (3) acid dissolution reduction: carrying out acid dissolution on the metatitanic acid obtained in the step (2), and then adding aluminum powder for reduction to obtain a trivalent titanium solution. The method can recycle titanium resources, improve the titanium yield, increase economic benefits, reduce theproduction cost and solve the problem of environmental pollution.

Description

technical field [0001] The invention belongs to the technical field of titanium dioxide production, and in particular relates to a method for preparing trivalent titanium by hydrolyzing scale. Background technique [0002] In the production process of titanium dioxide by sulfuric acid method, due to many factors such as the equipment design of the hydrolysis pot, the material of the pot wall and the washing equipment in the hydrolysis process, 50-100 cm of hydrolyzed solid phase is adhered to the inner wall of the hydrolysis pot, which is also called hydrolysis scale, because its Hard structure, high iron content, many calcium impurities, difficult to depolymerize, difficult to recycle. [0003] The current conventional treatment methods for hydrolyzed scale include: pile up the landfill with titanium gypsum and discard it directly; or sell it cheaply to downstream industries with low titanium quality requirements, which reduces the pressure on environmental protection and a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/00C22B34/12
CPCC01G23/00C22B34/124Y02P10/20
Inventor 林发蓉杜国华曹鹏熊怀忠周春勇吴彭森和奔流陈林
Owner SICHUAN LOMON TITANIUM IND CO LTD