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Titanium dioxide solution production method capable of reducing acid consumption

A production method and technology of titanium liquid, applied in the direction of chemical instruments and methods, titanium dioxide, titanium compounds, etc., can solve problems such as failure to meet hydrolysis requirements, lower F value, unqualified titanium liquid, etc., to reduce dosage, reduce pressure, The effect of reducing production costs

Active Publication Date: 2014-07-09
JINAN YUXING CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the amount of 93% acid remains unchanged and the amount of titanium ore increases, after the acid hydrolysis reaction, the amount of free acid decreases, and the F value will decrease, resulting in unqualified titanium liquid and failing to meet the hydrolysis requirements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The raw material of titanium ore (titanium dioxide content is 44.5%) is sent to the pre-powder process, crushed, passed through a 320 mesh sieve, and the remaining 7.8% is sieved. Adjust the air volume in the acid hydrolysis tank to 150-200m 3 / h, add 42t of sulfuric acid with a concentration of 93% into the acid hydrolysis tank; after homogenizing for 20min, add 27600kg of titanium ore into the acid hydrolysis tank according to the acid ore ratio of 1.52:1. Adjust the air volume to 600-800m 3 / h, feed 2t / h of steam, after the temperature rises to 60°C, stop the steam. After the temperature at the top of the acidolysis tank rises to the highest point, adjust the air volume to 200m?? / h, and ripen for 90min. Add 4t of waste acid to the acid hydrolysis tank (the waste acid after hydrolyzing and washing the titanium solution in the previous process, the concentration is 22.7%) to adjust the F value to 1.92; then add 69m 3 Water is used for leaching, and then iron powder ...

Embodiment 2

[0022] The raw material of titanium ore (titanium dioxide content is 44.5%) is sent to the pre-powder process, crushed, passed through a 320 mesh sieve, and the remaining 7.8% is sieved. Adjust the air volume in the acid hydrolysis tank to 150-200m 3 / h, add 42t of sulfuric acid with a concentration of 93% into the acid hydrolysis tank; after homogenizing for 20min, add 26900kg of titanium ore into the acid hydrolysis tank according to the acid ore ratio of 1.56:1. Adjust the air volume to 600-800m 3 / h, feed 2t / h of steam, after the temperature rises to 60°C, stop the steam. After the temperature at the top of the acidolysis tank rises to the highest point, adjust the air volume to 200m?? / h, and ripen for 90min. Add 3t of waste acid to the acid hydrolysis tank (the waste acid after hydrolyzing and washing the titanium solution in the previous process, the concentration is 22.4%) to adjust the F value to 1.95; then add 67.2m 3 Water is used for leaching, and then iron powde...

Embodiment 3

[0024] The raw material of titanium ore (titanium dioxide content is 44.5%) is sent to the pre-powder process, crushed, passed through a 320 mesh sieve, and the remaining 7.8% is sieved. Adjust the air volume in the acid hydrolysis tank to 150-200m 3 / h, add 42 tons of sulfuric acid with a concentration of 93% into the acid hydrolysis tank; after homogenizing for 20 minutes, add 27200kg of titanium ore into the acid hydrolysis tank according to the acid ore ratio of 1.54:1. Adjust the air volume to 600-800m?? / h, feed 2t / h of steam, and stop the steam after the temperature rises to 60°C. After the temperature at the top of the acidolysis tank rises to the highest point, adjust the air volume to 200m 3 / h, aging 90min. Add 5t of waste acid to the acid hydrolysis tank (the waste acid after hydrolyzing and washing the titanium liquid in the previous process, the concentration is 23.3%) to adjust the F value to 1.97; then add 68m 3 Water is used for leaching, and then iron powde...

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PUM

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Abstract

The invention relates to a titanium dioxide solution production method capable of reducing acid consumption, belonging to the technical field of titanium dioxide production. The titanium dioxide solution production method capable of reducing acid consumption comprises the steps of: carrying out a solid-phase sulfuric acid method on titanium ores serving as raw material, carrying out acidolysis, leaching, sedimentation and filtration, and crystallization. The production method is characterized in that the ratio of acid to ores is 1.52-1.56, and F value is 1.88-1.98. According to the titanium dioxide solution production method capable of reducing acid consumption, the ratio of acid to ores is limited to be 1.52-1.56, so that the titanium ores can be fully dissolved, the acid consumption can be effectively reduced, the utilization rate of waste acid can be increased, and the index of the titanium dioxide solution can reach the hydrolysis requirement; in addition, the productivity of the titanium dioxide solution can also be improved. By adopting the method, the acid consumption in a black zone is reduced to 3.716 from 3.827 before waste acid is used, the consumption of sulfuric acid can be decreased when titanium ores are subjected to acidolysis, the production cost can be lowered, further waste acid can be recycled, and the burden of waste acid treatment can be reduced; in addition, the productivity of titanium dioxide solution can be improved to 91.7% from 89.1%.

Description

technical field [0001] The invention relates to a method for producing titanium liquid that reduces acid consumption, and belongs to the technical field of titanium dioxide production. Background technique [0002] The production of titanium dioxide by sulfuric acid method is a technology commonly used by titanium dioxide manufacturers in my country. Its principle is: acidolysis reaction of ferrotitanium powder and concentrated sulfuric acid to generate titanium oxysulfate, hydrolysis to generate metatitanic acid, and then calcining and crushing. A titanium dioxide product is obtained; the process includes crushing, acid hydrolysis, sedimentation, crystallization, fine filtration, concentration, hydrolysis, water washing, calcining, coating, and packaging. The washing process of titanium dioxide production will produce a large amount of waste acid during production. If it is not treated, it will cause environmental pollution; if it is treated, it will increase the production ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/00C01G23/053
Inventor 王社李登鹏寻涛马学兵谢凤俊
Owner JINAN YUXING CHEM