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Method for producing titanium-rich material by processing vanadium-titanium-containing blast furnace slag with titanium white waste acid

A technology of titanium white waste acid and blast furnace slag, which is applied in the direction of ferric sulfate, titanium dioxide, process efficiency improvement, etc., can solve major environmental problems and other problems, and achieve obvious effects of reducing pollution, reducing costs, economic benefits and social benefits

Active Publication Date: 2014-04-09
云南昆欧科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The treatment of three wastes is the industrial bottleneck of the production of titanium dioxide by sulfuric acid method, and the treatment of waste acid is the biggest environmental protection problem
The comprehensive utilization of blast furnace slag as a resource has not yet found an economical and reasonable technical route

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: 100g of blast furnace slag (taken from Panzhihua Iron and Steel Group Xichang Xingang Industry Co., Ltd.) was quenched with water, and 400ml of titanium dioxide waste acid was added (H 2 SO 4 21%, residual titanium TiO 2 4g / l), heated to boiling, maintained for 20min, acidolyzed to the beginning of the reaction, the main reaction temperature was 170°C, the main reaction time was 15min, continued heating and curing for 2h, forming a black-gray solid phase. At 120°C, add 200ml of waste acid for leaching. The leaching time is 60min. Solid-liquid separation is carried out to obtain 87g (dry weight) of acid hydrolysis residue. The solution contains TiO 2 90g / l, F value 2.2. join (NH 4 ) 2 SO 4 Purify and remove aluminum, and at the same time blow in air for stirring, so that FeSO 4 Partially oxidized to Fe (SO 4 ) 3 , part of the silica gel was removed, and the purified solution was hydrolyzed by adding seed crystals under normal pressure to obtain 16g of ...

Embodiment 2

[0023] Example 2: 100g of blast furnace slag (taken from Panzhihua Iron and Steel Group Xichang Xingang Industry Co., Ltd.) was quenched with water, and 400ml of titanium dioxide waste acid was added (H 2 SO 4 19%, residual titanium TiO 2 4.5g / l), heated to boiling, maintained for 20min, acidolyzed to the beginning of the reaction, the main reaction temperature was 170°C, the main reaction time was 15min, and continued to heat and heat-preserve for 2h to form a black-gray solid phase. At 120°C, add 200ml of waste acid for leaching. The leaching time is 60min. Solid-liquid separation is carried out to obtain 86g (dry weight) of acid hydrolysis residue. The solution contains TiO 2 92g / l, F value 2.3. join (NH 4 ) 2 SO 4 Purify and remove aluminum, and at the same time blow in air for stirring, so that FeSO 4 Partially oxidized to Fe (SO 4 ) 3 , part of the silica gel was removed, and the purified solution was hydrolyzed by adding seed crystals under normal pressure to ob...

Embodiment 3

[0024] Example 3: 100g of blast furnace slag (taken from Xichang New Steel Industry Company of Panzhihua Iron and Steel Group) was quenched with water, and 400ml of titanium white waste acid was added (H 2 SO 4 20%, residual titanium TiO 2 3.8g / l), heated to boiling, maintained for 20min, acidolyzed to the beginning of the reaction, the main reaction temperature was 170°C, the main reaction time was 15min, continued heating and curing for 2h, forming a black gray solid phase. At 120°C, add 200ml of waste acid for leaching. The leaching time is 60min. Solid-liquid separation is carried out to obtain 88g (dry weight) of acid hydrolysis residue. The solution contains TiO 2 89g / l, F value 2.1. join (NH 4 ) 2 SO 4 Purify and remove aluminum, and at the same time blow in air for stirring, so that FeSO 4 Partially oxidized to Fe (SO 4 ) 3 , part of the silica gel was removed, and the purified solution was hydrolyzed by adding seed crystals under normal pressure to obtain 15 g...

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PUM

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Abstract

The invention relates to a method for producing a titanium-rich material by processing vanadium-titanium-containing blast furnace slag with titanium white waste acid, which comprises the following steps: (1) grinding blast furnace water-quenching slag, adding waste sulfuric acid generated in a titanium white production process, heating to a boiling state, carrying out acidolysis reaction with the water-quenching blast furnace slag at 170 DEG C, and continuing heating to form a black solid-phase substance; (2) adding the titanium white waste acid to carry out leaching, and carrying out solid-liquid separation; (3) adding (NH4)2SO4 into the filtrate to remove aluminum, and meanwhile blowing air to stir so as to oxidize part of FeSO4 into Fe2(SO4)3, thereby removing part of silica gel; (4) hydrolyzing the purified liquid by added crystal seeds under 0.09-0.11Mpa to obtain the product of which the TiO2 content is 99.1-99.5%; and (5) drying the metatitanic acid by flash evaporation to obtain the product TiO2. The invention lowers the processing cost of waste acid, reduces the environmental pollution, and can comprehensively utilize the vanadium-titanium-containing blast furnace slag to recycle valuable elements scandium, titanium and vanadium. The economic benefit and social benefit of the method are very obvious.

Description

technical field [0001] The invention relates to the technical field of the utilization of titanium white waste acid and the treatment method of vanadium-containing titanium blast furnace slag. Background technique [0002] Sulfuric acid titanium dioxide is a process technology suitable for my country's national conditions and the characteristics of domestic titanium resources. my country is the largest producer of titanium dioxide in the world, with a production capacity of 2.5 million tons per year, 80% of which are produced by the sulfuric acid method. The treatment of three wastes is the industrial bottleneck of producing titanium dioxide by sulfuric acid method, and the treatment of waste acid is the biggest environmental protection problem. For every ton of titanium dioxide produced, 20 tons of waste sulfuric acid with a concentration of 18-20% will be discharged. The usual treatment method is to use limestone to neutralize the waste acid. For every ton of titanium di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/053C01G49/14C22B7/04C22B34/22C22B59/00
CPCY02P10/20
Inventor 蒋朋钢段明华黄北卫
Owner 云南昆欧科技有限责任公司