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Continuous acidolysis method for titanium concentrate

A titanium concentrate and acid hydrolysis technology, applied in chemical instruments and methods, titanium dioxide, titanium compounds, etc., can solve the problems of high consumption of concentrated sulfuric acid, achieve stable acid hydrolysis efficiency, reduce waste acid discharge, and reduce consumption

Pending Publication Date: 2022-02-25
CHONGQING TITANIUM IND OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is the large consumption of concentrated sulfuric acid in the existing titanium concentrate continuous acid hydrolysis technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] a. Mix titanium concentrate and concentrated sulfuric acid according to the mass ratio of 1:1.35 to obtain the acid ore mixture for subsequent use, control the temperature of the acid ore mixture to 22° C. with chilled water, and heat dilute sulfuric acid with a concentration of 45% to 80° C.;

[0046] b. The acid ore mixture according to 6m 3 / h feed into the continuous acid hydrolysis reactor, dilute sulfuric acid according to 2.50m 3 / h enters the continuous acid hydrolysis reactor, and the mass fraction of sulfuric acid in the control mixed slurry is 83.21%;

[0047] c. Control the stirring frequency of the reactor to 48HZ, and the reaction time is 45min. After fully reacting, the material is discharged to obtain the acidolysis solid phase, and the material discharge temperature is 142°C;

[0048] d. Send the acidolysis solid phase to the primary dissolution tank, and press 7m 3 Dissolved water is added at the flow rate of / h, the acidolysis solution leached in th...

Embodiment 2

[0051] a. Mix titanium concentrate and concentrated sulfuric acid according to the mass ratio of 1:1.3 to obtain the acid ore mixture for subsequent use, control the temperature of the acid ore mixture to 22° C. with chilled water, and heat dilute sulfuric acid with a concentration of 50% to 95° C.;

[0052] b. The acid ore mixture according to 6m 3 / h feed into the continuous acid hydrolysis reactor, dilute sulfuric acid according to 2.60m 3 / h enters the continuous acidolysis reactor, and the massfraction of sulfuric acid in the control mixed slurry is 82.6%;

[0053] c. Control the stirring frequency of the reactor to 48HZ, and the reaction time is 48min. After fully reacting, the material is discharged to obtain the acidolysis solid phase, and the material discharge temperature is 140°C;

[0054] d. Send the acidolysis solid phase to the primary dissolution tank, and press 6.5m 3 Dissolved water is added at the flow rate of / h, the acidolysis solution leached in the prim...

Embodiment 3

[0057] a. Mix titanium concentrate and concentrated sulfuric acid according to the mass ratio of 1:1.48 to obtain the acid ore mixture for subsequent use, control the temperature of the acid ore mixture to 22° C. with chilled water, and heat dilute sulfuric acid with a concentration of 22% to 50° C.;

[0058] b. The acid ore mixture according to 5.5m 3 / h feed into the continuous acid hydrolysis reactor, dilute sulfuric acid according to 1.75m 3 / h enters the continuous acidolysis reactor, and the mass fraction of sulfuric acid in the control mixed slurry is 82.35%;

[0059] c. Control the stirring frequency of the reactor to 46HZ, and the reaction time is 40min. After fully reacting, the material is discharged to obtain the acidolysis solid phase, and the material discharge temperature is 145°C;

[0060] d. Send the acidolysis solid phase to the primary dissolution tank, and press 6.5m 3 Dissolved water is added at the flow rate of / h, the acidolysis solution leached in the...

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PUM

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Abstract

The invention discloses a continuous acidolysis method for titanium concentrate, and belongs to the field of chemical engineering. The continuous acidolysis method for the titanium concentrate comprises the following steps: a, mixing the titanium concentrate with concentrated sulfuric acid, and controlling the temperature of an acid-ore mixture to be less than or equal to 30 DEG C; taking dilute sulfuric acid and controlling the temperature of the dilute sulfuric acid to be more than or equal to 50 DEG C; b, adding the acid-ore mixture and dilute sulphuric acid into a reactor at the same time, and controlling the mass fraction of the sulphuric acid in the mixed slurry to be 81-85%; c, fully reacting the mixed slurry in the reactor, discharging, and controlling the discharging temperature to be greater than or equal to 135 DEG C; d, sending an acidolysis solid-phase substance to a first-stage dissolving tank for leaching, and overflowing an acidolysis solution leached in the first-stage dissolving tank to a second-stage dissolving tank; and e, overflowing the second-stage dissolving tank to obtain titanium liquid, and refluxing 50-80% of titanium liquid to the first-stage dissolving tank. According to the method, the acidolysis efficiency is stable, the titanium yield can be effectively increased, meanwhile, the recycling amount of the sulfuric acid process titanium white waste acid is increased, and the problem that the consumption of concentrated sulfuric acid is large in an existing titanium concentrate continuous acidolysis technology can be effectively solved.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a method for continuous acid hydrolysis of titanium concentrate. Background technique [0002] In the production process of sulfuric acid titanium dioxide, the mature method to extract titanium from titanium concentrate is to react sulfuric acid with titanium concentrate to obtain titanyl sulfate solution (referred to as titanium solution). During the acidolysis process of titanium concentrate A large amount of concentrated sulfuric acid needs to be consumed. How to effectively reduce the consumption of concentrated sulfuric acid while improving the efficiency of the acid hydrolysis reaction is a key factor in the production process of sulfuric acid titanium dioxide. [0003] At present, there are mainly two traditional acid hydrolysis methods: ① interstitial acid hydrolysis, which mixes titanium concentrate and sulfuric acid and then reacts in a single batch in the i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053
CPCC01G23/053C01G23/0532
Inventor 陈新红刘勇彭文滔刘源吴平全张剑吴艳
Owner CHONGQING TITANIUM IND OF PANGANG GROUP