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Artificial rutile mother liquor comprehensive resource utilization method

An artificial rutile and comprehensive resource technology, applied in the direction of iron halide, titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of increasing processing costs, increasing production costs, and low iron ion concentration, so as to reduce energy consumption and reduce comprehensive The effect of energy consumption

Inactive Publication Date: 2019-03-15
YIBIN TIANYUAN GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

In order to ensure the leaching efficiency during the production of artificial rutile, the ratio of ore to acid is generally maintained at 1:3 to 1:3.5 (22% to 26% hydrochloric acid), and the theoretical excess of hydrochloric acid is more than 50%, resulting in a large amount of residual acid and iron in the mother liquor. The ion concentration is low, a large amount of evaporation is required during crystallization separation, and in order to improve the crystallization efficiency, it needs to be frozen. These processes all consume a lot of energy and increase the processing cost, and the excessive hydrochloric acid is not effectively used, which increases the production cost.
In addition, during the leaching process of hydrochloric acid, amorphous titanium dioxide will inevitably be acid-decomposed to form TiOCl 2 Into the mother liquor, its concentration is generally 3 to 6%, this part of titanium dioxide is not effectively utilized, resulting in waste of resources

Method used

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  • Artificial rutile mother liquor comprehensive resource utilization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The main component is TiO 2 : 48.17%, SiO 2 : 2.16%, CaO: 0.23%, MgO: 0.77% titanium concentrates were redox modified in a fluidized furnace to obtain modified titanium concentrates; 300g modified titanium concentrates were weighed, and the Next, artificial rutile mother liquor was added for pretreatment, the mass ratio of modified titanium concentrate and artificial rutile mother liquor was 1:3, the leaching reaction temperature was 90°C, the leaching reaction time was 6h, and the stirring speed during the reaction was 50r / min;

[0031] After the reaction, the solid-liquid separation was carried out to obtain the primary mother liquor and the pretreated titanium concentrate. The primary mother liquor was allowed to stand for 6 hours, and then filtered. After the obtained filter cake was dried, 8.8 g of titanium yellow powder was obtained; the secondary mother liquor obtained by filtration was detected, and the second FeCl in secondary mother liquor 2 +FeCl 3 The m...

Embodiment 2

[0035] The main component is TiO 2 : 48.17%, SiO 2 : 2.16%, CaO: 0.23%, MgO: 0.77% ilmenite concentrates were redox modified in a fluidized furnace to obtain modified ilmenite concentrates; 300g of modified ilmenite concentrates were weighed, and the Next, artificial rutile mother liquor was added for pretreatment, the mass ratio of modified titanium concentrate and artificial rutile mother liquor was 1:2, the leaching reaction temperature was 80°C, the leaching reaction time was 9h, and the stirring speed during the reaction was 80r / min;

[0036] After the reaction, the solid-liquid separation was carried out to obtain the primary mother liquor and the pretreated titanium concentrate. The primary mother liquor was allowed to stand for 5 hours, and then filtered. After the obtained filter cake was dried, 9.6 g of titanium yellow powder was obtained; the secondary mother liquor obtained by filtration was detected. FeCl in secondary mother liquor 2 +FeCl 3 The mass concentr...

Embodiment 3

[0040] The main component is TiO 2 : 48.17%, SiO 2 : 2.16%, CaO: 0.23%, MgO: 0.77% ilmenite concentrates were redox modified in a fluidized furnace to obtain modified ilmenite concentrates; 300g of modified ilmenite concentrates were weighed, and the Next, artificial rutile mother liquor is added for pretreatment, the mass ratio of modified titanium concentrate and artificial rutile mother liquor is 1:5, the leaching reaction temperature is 110°C, the leaching reaction time is 4h, and the stirring speed during the reaction is 50r / min;

[0041] After the reaction, the solid-liquid separation was carried out to obtain the primary mother liquor and the pretreated titanium concentrate. The primary mother liquor was allowed to stand for 9 hours, and then filtered, and the obtained filter cake was dried to obtain 9.2 g of titanium yellow powder; the secondary mother liquor obtained by filtration was detected, and the second FeCl in secondary mother liquor 2 +FeCl 3 The mass con...

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Abstract

The invention discloses an artificial rutile mother liquor comprehensive resource utilization method which comprises the following steps: (1) preprocessing, that is, adding artificial rutile mother liquor into modified ilmenite concentrate before acid leaching to carry out preprocessing, wherein a mass ratio of the modified ilmenite concentrate to the artificial rutile mother liquor is 1: (2 to 5); (2) after preprocessing, carrying out solid-liquid separation to obtain primary mother liquor and preprocessed ilmenite concentrate, enabling the obtained preprocessed ilmenite concentrate to entera subsequent acid leaching process to continuously process, and after performing standing on the obtained primary mother liquor, filtering to obtain titanium yellow powder and secondary mother liquor;and (3) carrying out concentration on the obtained secondary mother liquor, and filtering to obtain ferrous chloride crystals and filtrate. According to the invention, about 10% of residual hydrochloric acid in the artificial rutile mother liquor is sufficiently utilized, energy consumption in the subsequent mother liquor concentration crystallization process is reduced, comprehensive energy consumption can be reduced by 30% or more, and meanwhile, residual TiO2 in the artificial rutile mother liquor is recovered.

Description

technical field [0001] The invention relates to a waste liquid treatment method in the chemical industry, in particular to a treatment method for artificial rutile mother liquor. Background technique [0002] Artificial rutile is an important basic raw material for the titanium industry. It is mainly used in the production of chlorinated titanium dioxide, titanium sponge, titanium tetrachloride and electrode coatings. It is an excellent substitute for natural rutile. Among the different production process routes of artificial rutile, the artificial rutile production process of hydrochloric acid method has the advantages of fast leaching speed, strong impurity removal ability, high product quality, and is suitable for processing various types of mineral sources. It has become the mainstream process and realized industrialization very early. . [0003] In the artificial rutile production process of the hydrochloric acid method, generally about 22-26% hydrochloric acid is used...

Claims

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Application Information

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IPC IPC(8): C01G23/047C01G49/10
CPCC01G23/047C01G49/10
Inventor 罗云邓敏明崇伦周高明唐勇刘祥海汪大成李露
Owner YIBIN TIANYUAN GRP CO LTD
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