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Recycling method of ferrous sulfate heptahydrate centrifugal mother liquid in production of sulfate process titanium dioxide

A technology of centrifuging mother liquor and ferrous sulfate, which is applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of affecting product quality, centrifuging mother liquor blocking the delivery pipeline, etc., and achieve the goal of improving product quality, improving stability, and increasing acidity Effect

Active Publication Date: 2015-04-01
PANZHIHUA DONGFANG TITANIUM IND
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Problems solved by technology

[0004] In view of this, this application provides a method for recycling ferrous sulfate heptahydrate centrifuged mother liquor in the production of sulfuric acid titanium dioxide, which solves the problem of clogging the delivery pipeline during the use of centrifuged mother liquor, and the early hydrolysis during storage and transportation affects the product Quality problems, improve the system titanium dioxide yield and quality

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  • Recycling method of ferrous sulfate heptahydrate centrifugal mother liquid in production of sulfate process titanium dioxide
  • Recycling method of ferrous sulfate heptahydrate centrifugal mother liquid in production of sulfate process titanium dioxide

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Embodiment 1

[0015] A method for recycling ferrous sulfate heptahydrate centrifuged mother liquor in sulfuric acid titanium dioxide production, comprising adding sulfuric acid solution with a mass percentage of 20-25% to the centrifuged mother liquor, and using the centrifuged mother liquor added with sulfuric acid solution for acid hydrolysis and leaching A step of.

[0016] Collect the centrifuged mother liquor into the mother liquor collection tank, add sulfuric acid solution at a temperature of 38-42°C to the mother liquor collection tank, the volume ratio of the centrifuged mother liquor and sulfuric acid solution is 1:2.5, and the sulfuric acid solution is washed with water during the sulfuric acid method titanium dioxide production process acid produced in the process. The content of ferrous sulfate in the centrifuged mother liquor is 135g / L, the concentration of titanium dioxide is 45g / L, and the temperature is 21°C. After adding sulfuric acid solution, the temperature of the mixed...

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Abstract

The invention discloses a recycling method of ferrous sulfate heptahydrate centrifugal mother liquid in production of sulfate process titanium dioxide. The method comprises the step of adding 20-25 percent by mass of sulfuric acid solutions into the centrifugal mother liquid to ensure that the centrifugal mother liquid added with the sulfuric acid solutions is used in an acidolysis leaching step. The problems that delivery pipelines are blocked in the use process of the centrifugal mother liquid and the quality of the product is influenced caused by early-stage hydrolysis in a storage and transfer process are solved by adding the sulfuric acid solutions into the centrifugal mother liquid and controlling the concentration and the temperature of the sulfuric acid solutions and the volume ratio of the mother liquid to the sulfuric acid solutions, and the yield and the quality of titanium dioxide in the system are improved.

Description

technical field [0001] The invention relates to the field of comprehensive utilization of titanium dioxide production resources by a sulfuric acid process, in particular to a method for recycling ferrous sulfate heptahydrate centrifugal mother liquor in the production of titanium dioxide by a sulfuric acid process. Background technique [0002] In the production of sulfuric acid titanium dioxide, in order to meet the quality requirements of hydrolysis, it is necessary to remove iron from the titanium solution. The method of vacuum crystallization is used to separate and remove the iron in the titanium solution in the form of ferrous sulfate heptahydrate crystals. At the same time, in order to ensure the yield of titanium dioxide in the system It is necessary to wash the ferrous sulfate heptahydrate crystal, and then pass through the centrifuge to further separate the titanium liquid entrained in the ferrous ferrous sulfate. After the ferrous sulfate heptahydrate is centrifuge...

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Application Information

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IPC IPC(8): C01G23/053
CPCC01G23/053
Inventor 张强王荣凯李顺泽王显云袁辉蒋贤均隆斌
Owner PANZHIHUA DONGFANG TITANIUM IND
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