Ferrous sulfate crystallization device for sulfuric acid method titanium dioxide

Abstract

The invention belongs to the technical field of sulfuric acid method titanium dioxide production equipment, and discloses a ferrous sulfate crystallization device for sulfuric acid method titanium dioxide. The device comprises a crystallization tank; the top of the crystallization tank is connected with a first high-level tank; the bottom of the crystallization tank is provided with a feeding anddischarging port; the lower part of the crystallization tank is provided with a side stirring device; the upper part of the crystallization tank is connected with a vacuum ejector; the top of the vacuum ejector is connected with a second high-level tank; the bottom of the vacuum ejector is connected with an acid circulation tank; the acid circulation tank is connected with the top of the vacuum ejector through an acid pump and a heat exchanger; the acid circulation tank is provided with an acid supplementing port; a cooling circulation system is connected to the heat exchanger; and an acid discharge opening is arranged between the top of the heat exchanger and the top of the vacuum ejector. According to the device, the gravity action of a material is combined with easy water absorption performance and low saturation steam pressure of concentrated sulfuric acid, and then a vacuum environment is created. Crystallization of the ferrous sulfate is realized without the use of steam, and thepurpose of separating the ferrous sulfate with titanium liquid is achieved.

Description

technical field [0001] The invention belongs to the technical field of sulfuric acid process titanium dioxide production equipment, and in particular relates to a sulfuric acid process titanium white ferrous sulfate crystallization device. Background technique [0002] As the best white pigment in the world, titanium dioxide is widely used in coatings, plastics, papermaking and other fields. Titanium dioxide has two production processes: sulfuric acid method and chlorination method, and sulfuric acid method still occupies the dominant position at present. [0003] In the process of producing titanium dioxide by the sulfuric acid method in industry, a large amount of iron elements will be brought by the ilmenite raw material. Therefore, it is necessary to form ferrous sulfate crystals in the production to separate and remove them, so as to achieve the iron content of the finished titanium dioxide in an appropriate range. Inside, to ensure the whiteness and application perfor...

AI Technical Summary

Problems solved by technology

Although vacuum crystallization has many advantages, the method consumes a lot of steam and electricity, and the energy consumption is high

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