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A kind of titanium liquid production method that reduces acid consumption

A production method and technology of titanium liquid, applied in chemical instruments and methods, titanium dioxide, titanium compounds, etc., can solve the problems of reduced F value, failure to meet hydrolysis requirements, unqualified titanium liquid, etc., to reduce the acid-to-ore ratio, improve Yield, cost reduction effect

Active Publication Date: 2016-03-09
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 solution 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 pow...

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PUM

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Abstract

The invention relates to a method for producing titanium liquid that reduces acid consumption, and belongs to the technical field of titanium dioxide production. The low-acid-consumption titanium liquid production method of the present invention uses titanium ore as a raw material and adopts solid-phase sulfuric acid method; includes acid hydrolysis, leaching, sedimentation filtration and crystallization steps; its improvement is that the acid-mineral ratio is 1.52-1.56 ; F value is 1.88-1.98. The present invention limits the ratio of acid ore to 1.52-1.56. At this time, titanium ore can be fully dissolved and can effectively reduce acid consumption, increase the utilization rate of waste acid, and at the same time ensure that the titanium liquid index meets the hydrolysis requirement; in addition, it can also improve the titanium liquid Yield. By adopting the method of the present invention, the acid consumption in the black area is reduced from 3.827 before using the waste acid to 3.716, reducing the consumption of sulfuric acid during the acidolysis of titanium ore, and reducing the production cost. At the same time, the waste acid is further recycled and the waste acid treatment is reduced. burden; in addition, the yield of titanium liquid increased from 89.1% to 91.7%.

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 Patents(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