Method for preparing titanium slag by wet-processing on vanadium-titanium magnetite concentrates

A vanadium-titanium magnetite concentrate and wet processing technology, applied in the field of hydrometallurgy, can solve the problems of difficult recycling of acid solution, no titanium slag, large discharge of waste acid, etc., and achieves high utilization rate of titanium resources and high raw material Cost reduction and high reaction efficiency

Active Publication Date: 2015-04-01
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the phase of titanium slag obtained by electric furnace smelting is relatively stable, concentrated sulfuric acid with a mass fraction of 92% is usually used in acid hydrolysis, and the acid solution is difficult to recycle, resulting in a large amount of waste acid discharge
At present, there is no patent or report on the use of vanadium-titanium magnetite concentrate or mixed concentrate (a mixture of iron concentrate and titanium concentrate) to prepare titanium slag using a hydrometallurgical process

Method used

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  • Method for preparing titanium slag by wet-processing on vanadium-titanium magnetite concentrates

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The vanadium-titanium magnetite concentrate is leached in a closed container with 30% hydrochloric acid at 150°C. The liquid-solid ratio of hydrochloric acid and concentrate is 2:1. :1, the temperature is 80°C, and the time is 15min). The washed slag obtained after filtration is neutralized with NaOH lye, and the pH value of the slurry is adjusted to 5-6 (neutralization conditions: the concentration of lye is 10%, the liquid-solid ratio of lye to washed slag is 5:1, and the temperature at 40°C for 30 minutes). After filtration, desiliconize the neutralized slag with 15% NaOH solution at 80°C for 30 minutes, wherein the liquid-solid ratio of NaOH solution and neutralized slag is 3:1; wash with water after filtration, wherein, water and The liquid-solid ratio of alkali-washed slag is 2:1; the obtained water-washed slag is pickled with 20% dilute sulfuric acid and its pH value is adjusted to 5-6, wherein the liquid-solid ratio of dilute acid and water-washed slag is 2: 1...

Embodiment 2

[0038] The vanadium-titanium magnetite concentrate is leached in a closed container with 10% hydrochloric acid at 150°C. The liquid-solid ratio of hydrochloric acid and concentrate is 10:1. , the temperature is 60°C, and the time is 30min). The washed slag obtained after filtration is neutralized with NaOH lye, and the pH value of the slurry is adjusted to 5-6 (neutralization conditions: the concentration of lye is 5%, the liquid-solid ratio of lye to washed slag is 10:1, and the temperature at 60°C for 20 minutes). After filtration, desiliconize the neutralized slag with 9% NaOH solution at 110°C for 5 minutes, wherein the liquid-solid ratio of NaOH solution and neutralized slag is 6:1; wash with water after filtration, wherein, water and The liquid-solid ratio of alkali-washed slag is 10:1; the obtained water-washed slag is pickled with 5% dilute sulfuric acid and its pH value is adjusted to 5-6, wherein the liquid-solid ratio of dilute acid and water-washed slag is 10: 1;...

Embodiment 3

[0040] The vanadium-titanium magnetite concentrate is leached with 20% hydrochloric acid at 110°C under normal pressure. The liquid-solid ratio of hydrochloric acid and concentrate is 5:1. at 25°C for 60 minutes). The washed slag obtained after filtration is neutralized with NaOH lye, and the pH value of the slurry is adjusted to 5-6 (neutralization conditions: the concentration of lye is 20%, the liquid-solid ratio of lye to washed slag is 2:1, and the temperature at 80°C for 10 minutes). After filtration, desiliconize the neutralized slag with 13% NaOH solution at 80°C for 60 minutes, wherein the liquid-solid ratio of NaOH solution and neutralized slag is 3:1; wash with water after filtration, wherein, water and The liquid-solid ratio of alkali-washed slag is 4:1; the obtained water-washed slag is pickled with 8% dilute sulfuric acid and its pH value is adjusted to 5-6, wherein the liquid-solid ratio of dilute acid and water-washed slag is 4: 1; finally, drying the slag ob...

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Abstract

The invention belongs to the wet-process metallurgical field and in particular relates to a method for preparing titanium slag by wet-processing on vanadium-titanium magnetite concentrates. The method for preparing titanium slag by wet-processing on vanadium-titanium magnetite concentrates comprises the following steps of: (1), mixing the vanadium-titanium magnetite concentrates with an hydrochloric acid solution to obtain intermediate sizing agent; (2), filtering the intermediate sizing agent obtained in the step (1) to obtain leaching slag and carrying out secondary water-washing on the leaching slag (3), neutralizing the water-washing slag obtained in the step (2) by using a diluted alkaline solution, and filtering the neutralized sizing agent to obtain neutralized slag; (4), mixing the neutralized slag obtained in the step (3) with a NaOH solution to carry out alkaline-washing desilicication reaction; (5), filtering the product obtained by the alkaline-washing desilicication reaction, and carrying out water-washing on the obtained alkaline-washed slag; and (6), carrying out acid-pickling on the water-washed slag obtained by the water-washing in the step (5), filtering after the acid-pickling, drying and filtering the slag to obtain the titanium slag. The method for preparing titanium slag by wet-processing on vanadium-titanium magnetite concentrates has the advantages of being short in process, gentle in operation condition, low in device investment and the like.

Description

technical field [0001] The invention belongs to the field of hydrometallurgy, and particularly relates to a method for preparing titanium slag by wet processing vanadium-titanium magnetite concentrate. Background technique [0002] Vanadium-titanium magnetite is a compound ore in which iron, vanadium, titanium and other valuable elements coexist. It is the main source of vanadium and titanium products in my country, and is mainly distributed in Panxi, Chengde and Ma'anshan areas of China. However, the comprehensive utilization rate of vanadium and titanium resources in the traditional steel-oriented blast furnace smelting technology system is very low. For example, the comprehensive utilization rate of vanadium and titanium in Panzhihua Iron and Steel (calculated from raw ore to product) is only 39% and 14.5%. Resources become waste, serious waste of resources, and serious environmental pollution. In recent years, with the development of my country's economy, the demand for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/04C22B34/12
CPCY02P10/20
Inventor 王丽娜赵龙胜齐涛刘亚辉陈德胜赵宏欣曲景奎仲斌年胡国平
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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