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Method of removing silicon in artificial rutile mether liquor

A technology of artificial rutile and mother liquor, which is applied in chemical instruments and methods, water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., can solve the problems of complex process and long reaction time, and achieve simple process, low production cost, active effect

Inactive Publication Date: 2007-12-05
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method does not need alkali neutralization, and no new pollution occurs, but the reactivity of crushed iron is affected by various factors such as particle size, chemical composition of crushed iron, etc., the reaction time is long, and flocculant and ammonia water are also used, so the process is complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The content of free hydrochloric acid in the artificial rutile mother liquor is 43.1g / l, Fe 2+ The content is 75.12g / l, Fe 3+ Content 15.50g / l, SiO 2 380ppm (weight ratio content), first add steelmaking converter sludge iron powder, stir the solution and raise the temperature to 60 ° C, the stirring speed is 200 rpm, when the pH value of the solution is 2.0, according to 0.5% of the total iron content Add FeCl 3 into the solution, stirred at a constant temperature for 30 minutes and then filtered, the resulting filtrate contained SiO 2 The weight percent content is 9ppm.

Embodiment 2

[0014] The content of free hydrochloric acid in the artificial rutile mother liquor is 43.1g / l, Fe 2+ The content is 75.12g / l, Fe 3+ Content 15.50g / l, SiO 2 380ppm (weight ratio content), first add sponge iron powder, stir the solution and heat up to 70 ° C, the stirring speed is 300 rpm, when the pH value of the solution is 2.5, add FeCl according to 0.8% of the total iron content 3 into the solution, stirred at a constant temperature for 60 minutes and then filtered, the resulting filtrate contained SiO 2 The weight percent content is 6ppm.

Embodiment 3

[0016] The content of free hydrochloric acid in the artificial rutile mother liquor is 43.1g / l, Fe 2+ The content is 75.12g / l, Fe 3+ Content 15.50g / l, SiO 2 380ppm (weight ratio content), first add steelmaking converter sludge iron powder, stir the solution and heat up to 70°C, the stirring speed is 400 rpm, when the pH value of the solution is 3.0, according to 1% of the total iron content Add FeCl 3 into the solution, stirred and kept at a constant temperature for 90 minutes and then filtered, the resulting filtrate contained SiO 2 The weight percent content is 4ppm.

[0017] In above-mentioned 3 embodiments, free hydrochloric acid and iron powder reaction generate Fe 2+ The amount of ions entering the solution is 33.06g / l, and the total iron content in the solution after the reaction is: 75.12+15.50+33.06=123.68g / l, so the FeCl is added according to 0.5% of the total iron amount 3 , namely adding 0.62g / l FeCl 3 (usually FeCl 3 Contains 6 crystal waters, namely FeCl ...

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PUM

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Abstract

A process for removing Si from the mother liquid of artificial rutile includes such steps as adding Fe powder, heating while stirring to make pH=2-3, adding FeCl3, stirring at constant temp for 30-120 min to generate silicon gel deposit and filtering.

Description

technical field [0001] The invention relates to a step in producing hydrochloric acid and iron oxide powder for ferrite by using artificial rutile mother liquor, in particular to a method for removing silicon in artificial rutile mother liquor. Background technique [0002] In the process of leaching titanium concentrate with hydrochloric acid to produce artificial rutile, while the iron-containing substances in titanium concentrate dissolve into hydrochloric acid to form artificial rutile mother liquor, silicon in titanium concentrate is also dissolved into artificial rutile mother liquor. Removing silicon from the artificial rutile mother liquor will affect the quality of subsequent hydrochloric acid and iron oxide powder for ferrite. [0003] JP-P-03-40922 discloses a desiliconization method, first adding one or two or more components of Mn, Zn, Zn oxides, Zn hydroxides and Mn iron alloys to the mother liquor to make the pH of the solution Neutralize to more than 4, then...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/60C02F1/52
Inventor 王彦华朱胜友胡鸿飞于丹梁英
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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