A method for recrystallization-gravity recovery of titanium-containing slag

A titanium slag and recrystallization technology is applied in the field of complex resource recovery and comprehensive utilization in the metallurgical industry, which can solve the problems of land occupation and resource waste, and achieve the effects of easy operation, reduced recovery cost and simple process flow

Active Publication Date: 2017-01-04
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no economical and effective method to recycle the titanium, resulting in the accumulation of a large amount of titanium-containing slag, which not only occupies land, but also causes a great waste of resources
The problem of "utilization of titanium slag with high calcium, magnesium and silicon content" has not been solved until now

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The titanium-containing slag recrystallization-gravity method for recovering titanium, its specific steps are as follows:

[0039] (1) First, add 100g of titanium-containing slag with a particle size of 200~230 mesh to 300mL FeSO at a liquid-solid ratio of 3:1ml / g 4 -Fe 2 (SO 4 ) 3 -H 2 SO 4 In the aqueous solution, the temperature is 150°C, the mechanical stirring speed is 200r / min, and the heat preservation is carried out for 3 hours for hydrothermal recrystallization reaction. After liquid-solid separation, 127.9g of filter residue and filtrate are obtained. Ferrous sulfate and ferric sulfate are added to the filtrate as a follow-up A leaching agent for hydrothermal recrystallization reaction of titanium-containing slag; the phases of titanium-containing slag are titanium-rich diopside and pantitanium diopside ore, and the main components are: TiO 2 41.92wt%, CaO7.24wt%, MgO2.44wt%, Al 2 o 3 7.24wt%, SiO 2 19.92wt%, Fe11.85wt% and 14wt%V 2 o 5 ;FeSO 4 -Fe ...

Embodiment 2

[0042] The titanium-containing slag recrystallization-gravity method for recovering titanium, its specific steps are as follows:

[0043] (1) First, add 100g of titanium-containing slag with a particle size of 140-170 mesh to 600mL FeSO at a liquid-solid ratio of 6:1ml / g 4 -Fe 2 (SO 4 ) 3 -H 2 SO 4 In the aqueous solution, the temperature is 200 ℃, the mechanical stirring speed is 300r / min, and the heat preservation is carried out for 3 hours for hydrothermal recrystallization reaction. After liquid-solid separation, 112.7g of filter residue and filtrate are obtained. Ferrous sulfate and ferric sulfate are added to the filtrate as a follow-up A leaching agent for hydrothermal recrystallization reaction of titanium-containing slag; the phases of titanium-containing slag are titanium diopside and pantitanium diopside, and the main components are: TiO 2 41.92wt%, CaO7.24wt%, MgO2.44wt%, Al 2 o 3 7.24wt%, SiO 2 19.92wt%, Fe11.85wt% and 14wt%V 2 o 5 ;FeSO 4 -Fe 2 (SO 4...

Embodiment 3

[0046] The titanium-containing slag recrystallization-gravity method for recovering titanium, its specific steps are as follows:

[0047] (1) First, add 100g of titanium-containing slag with a particle size of 170-200 mesh to 500mL of FeSO at a liquid-solid ratio of 5:1ml / g 4 -Fe 2 (SO 4 ) 3 -H 2 SO 4 In the aqueous solution, the temperature is 175 ℃, the mechanical stirring speed is 600r / min, and the heat preservation is carried out for 3 hours to carry out the hydrothermal recrystallization reaction. After liquid-solid separation, 115.8g of filter residue and filtrate are obtained. The filtrate is supplemented with ferric sulfate and used as subsequent titanium-containing slag water. Leaching agent for thermal recrystallization reaction; the phases of titanium-containing slag are titanium diopside and pantitanium diopside ore, and the main components are: TiO 2 41.92wt%, CaO7.24wt%, MgO2.44wt%, Al 2 o 3 7.24wt%, SiO 2 19.92wt%, Fe11.85wt% and 14wt%V 2 o 5 ;FeSO 4 ...

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Abstract

The invention relates to a titaniferous slag recrystallization-reselection titanium recovery method and belongs to the technical field of complex resource recovery and comprehensive utilization of the metallurgical industry. According to the method, titaniferous slag with 24-42wt% of TiO2 is subjected to recrystallization through a hydrothermal method, and a new ilmenite phase and a new non-titanium ore phase are formed; remaining iron sulfate water solution is filtered out, diiron trisulfate is supplemented, and the hydrothermal method is conducted circularly, recrystallization is conducted for utilization; reselection is conducted on the filtered solid-phase matter which is subjected to recrystallization, and the ilmenite (the heavy phase) rich in titanium and the waste slag (the light phase) with little titanium are separated. According to the method, the reaction temperature is low, the reaction time is short, the technological process is simple, operation is easy, the titaniferous slag can be processed on a large scale, and the problem that the titaniferous slag is stacked and is hard to utilize is solved.

Description

technical field [0001] The invention relates to a titanium-containing slag recrystallization-gravity recovery method for titanium, which belongs to the technical field of recovery and comprehensive utilization of complex resources in the metallurgical industry. Background technique [0002] my country is rich in titanium resources, accounting for about 48% of the world's total titanium. Among them, vanadium-titanium magnetite is the main one, mainly distributed in Panxi area of ​​Sichuan and Chengde area of ​​Hebei. The reserves of titanium resources in Panxi area are about 601 million t (TiO 2 ), accounting for 90.54% of the total titanium in the country. At present, when the mined titanium ore is beneficiated, the TiO-containing 2 More than 50% ilmenite concentrate, containing TiO 2 About 10% iron concentrate and tailings containing 50% iron. Ilmenite concentrate has been used in production to extract metal titanium or titanium oxide, and the tailings are thrown away,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/04C22B34/12
CPCY02P10/20
Inventor 朱云毛晓勇施哲愈小花
Owner KUNMING UNIV OF SCI & TECH
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