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Method for manufacturing high-grade artificial rutile by ilmenite concentrate

A technology of artificial rutile and ilmenite, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of too long reaction time, complicated process and equipment, etc., to reduce energy consumption, reduce equipment investment, and avoid solid-liquid Difficulty effects of separation and washing

Inactive Publication Date: 2008-05-14
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former has complex processes and equipment, while the latter takes too long to respond

Method used

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  • Method for manufacturing high-grade artificial rutile by ilmenite concentrate

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Experimental program
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Effect test

Embodiment 1

[0028] In this embodiment, artificial rutile is produced as raw material with Panzhihuayan ore-type ilmenite concentrate (see Table 1 for chemical composition), and the process steps are as follows:

[0029] (1) ball mill activation

[0030] Put 200 grams of ilmenite concentrate in a planetary ball mill for ball mill activation, the ball-to-material ratio is 10:1, and the centrifugal acceleration of the ball is 180m / s 2 , the ball milling time is 20 minutes.

[0031] (2) Atmospheric pressure leaching

[0032] Take 100 grams of activated ilmenite and 500 ml of hydrochloric acid solution with a mass concentration of 15% and add them to the leaching kettle, and heat to 90°C under normal pressure to carry out the leaching reaction. The reaction time is 6 hours, and the dissolved titanium is hydrolyzed to generate an artificial rutile precursor. Impurities such as dissolved iron remain in the mother liquor.

[0033] (3) Solid-liquid separation

[0034] After the reaction is com...

Embodiment 2

[0044] In this embodiment, artificial rutile is produced as raw material with Panzhihuayan ore-type ilmenite concentrate (see Table 1 for chemical composition), and the process steps are as follows:

[0045] (1) ball mill activation

[0046] Put 200 grams of ilmenite concentrate in a planetary ball mill for ball mill activation, the ball-to-material ratio is 20:1, and the centrifugal acceleration of the ball is 100m / s 2 , the ball milling time is 15 minutes.

[0047] (2) Atmospheric pressure leaching

[0048]Take 100 grams of activated ilmenite and 400 ml of hydrochloric acid solution with a mass concentration of 20% and add them to the leaching kettle, and heat to 100°C under normal pressure for leaching reaction. The reaction time is 6 hours, and the dissolved titanium is hydrolyzed to generate an artificial rutile precursor. Impurities such as dissolved iron remain in the mother liquor.

[0049] (3) Solid-liquid separation

[0050] After the reaction is completed, cool ...

Embodiment 3

[0057] In this embodiment, artificial rutile is produced as raw material with Panzhihuayan ore-type ilmenite concentrate (see Table 1 for chemical composition), and the process steps are as follows:

[0058] (1) ball mill activation

[0059] Put 200 grams of ilmenite concentrate in a planetary ball mill for ball mill activation, the ball-to-material ratio is 30:1, and the centrifugal acceleration of the ball is 100m / s 2 , the ball milling time is 10 minutes.

[0060] (2) Atmospheric pressure leaching

[0061] Take 100 grams of activated ilmenite and 300 ml of hydrochloric acid solution with a mass concentration of 25% and add it to the leaching kettle, and heat it to 105°C under normal pressure to carry out the leaching reaction. The reaction time is 4 hours, and the dissolved titanium is hydrolyzed to generate an artificial rutile precursor. Impurities such as dissolved iron remain in the mother liquor.

[0062] (3) Solid-liquid separation

[0063] After the reaction is c...

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Abstract

The invention relates to a preparation method of high-grade synthetic rutile by using ilmenite concentrate. The technological procedure is as followings in sequence: firstly, a ball milling is activated; the mechanical ball milling is implemented to the ilmenite concentrate with a ball mill so as to activate the ilmenite concentrate; secondly, atmospheric pressure leaching; with a ratio ranging from 1:3 to 1:5 in volume, the ilmenite concentrate and the hydrochloric acid solution are heated to 90 to 105 DEG C in atmospheric pressure to carry out the leaching reaction for 4 to 6 hours, thereby a front body of the synthetic rutile is obtained; thirdly, solid-liquid separation, after the reaction is completed, the ground paste is cooled down to 30 DEG C to 50 DEG C, and then the front body of the synthetic rutile is separated from the mother solution by adopting a vacuum filtration, the separated mother solution can be prepared into revival hydrochloric acid and cycled to be used in atmospheric pressure leaching procedures; fourthly, washing, drying and calcining; the front body of the separated synthetic rutile is washed and dried, and then is calcined for 2 to 4 hours at a temperature of 800 DEG C to 1000 DEG C, thereby the powder synthetic rutile is obtained.

Description

technical field [0001] The invention belongs to a method for preparing artificial rutile, in particular to a method for preparing high-grade artificial rutile by using ilmenite concentrate as a raw material. Background technique [0002] At present, more than 60% of titanium dioxide in the world is produced by the chloride process, and its main raw material is rutile, but natural rutile only accounts for 0.3-1% of titanium resources, so most of the rutile in the production of titanium dioxide by the chloride process is made of ferro-titanium. Artificial rutile made from ore. The preparation methods of artificial rutile can be divided into: 1) electric furnace smelting-leaching method, the iron in ilmenite is reduced to metallic iron above 1600°C, the molten iron is separated from the slag containing titanium dioxide (titanium slag), and the titanium The slag is subjected to pressure acid leaching and other process steps to obtain artificial rutile, such as US patents US 583...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/047
Inventor 李春梁斌王海玉
Owner SICHUAN UNIV
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