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New sulfate process titanium dioxide acidolysis method

A sulfuric acid method, white acid technology, applied in chemical instruments and methods, titanium and titanyl sulfate, titanium dioxide and other directions, can solve the problems of inability to trigger the main reaction, take the pot, and the main reaction is violent, so as to reduce the potential danger, The effect of increasing the amount of waste acid and reducing steam loss

Active Publication Date: 2019-03-15
SHANDONG DAWN TITANIUM IND
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  • Summary
  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

The existing process is that 93% sulfuric acid reacts with titanium ore. When the winter temperature is lower than 5 degrees Celsius, the added initiating acid or the dilution heat generated by initiating water and 93% acid is not enough to initiate the main reaction, and steam heating is required. It is troublesome and dangerous to control the steam to guide the main reaction. If the steam is turned off early, the main reaction cannot be triggered. If the steam is turned off late, the main reaction is too violent, and there is a risk of a pot, and the acid hydrolysis rate of the output is low. , about 95%

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0022] A new sulfuric acid titanium dioxide acid hydrolysis method uses sulfuric acid with a mass fraction of 98% to directly react with titanium ore powder, and the main reaction can be safely carried out by controlling the compressed air flow and the frequency of the tail gas fan.

[0023] It includes the following steps:

[0024] (1) Put sulfuric acid and ilmenite powder with a mass fraction of 98% into the acidolysis reaction kettle at a ratio of 1.6:1;

[0025] (2) Control the instantaneous flow of compressed air to 600~700m 3 / h, one-time adding trigger solution, adjusting reactor acid concentration is 84%;

[0026] (3) When the temperature rises to 45°C, adjust the instantaneous flow of compressed air to 1000 m 3 / h, set the pumping capacity to 100000m 3 / h tail gas fan is adjusted to 80% of the opening, waiting for the main reaction to come;

[0027] (4) After the main reaction is completed, continue to maintain the existing compressed air volume for 15 to 20 minut...

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Abstract

The invention discloses a new sulfate process titanium dioxide acidolysis method. Sulfuric acid with mass fraction being 98% is utilized to be subjected to a reaction with titanium ore powder, and themain reaction is performed safely by controlling flow of compressed air and frequency of an exhaust draught fan; the method has technical effects as follows: raw material cost is saved, the risk of overflowing in the main reaction is reduced, and the acidolysis rate of ore is increased.

Description

technical field [0001] The invention relates to the field of titanium dioxide processing, in particular to a novel sulfuric acid hydrolysis method for titanium dioxide. Background technique [0002] The production process of titanium dioxide uses ilmenite as a raw material for subsequent production through sulfuric acid hydrolysis. The existing process is that 93% sulfuric acid reacts with titanium ore. When the winter temperature is lower than 5 degrees Celsius, the added initiating acid or the dilution heat generated by initiating water and 93% acid is not enough to initiate the main reaction, and steam heating is required. It is troublesome and dangerous to control the steam to guide the main reaction. If the steam is turned off early, the main reaction cannot be triggered. If the steam is turned off late, the main reaction is too violent, and there is a risk of a pot, and the acid hydrolysis rate of the output is low. , at around 95%. Contents of the invention [000...

Claims

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Application Information

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IPC IPC(8): C01G23/00C01G23/047C22B3/08
CPCC01G23/008C01G23/047C22B3/08
Inventor 曲以臣李建立曹波张盈盈
Owner SHANDONG DAWN TITANIUM IND
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