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Continuous decomposition crystallization device for thermally decomposing carnallite to prepare potassium chloride

A crystallizer and carnallite technology, applied in solution crystallization, alkali metal chloride, alkali metal halide purification, etc., can solve the problems of small evaporation, large water consumption, complex process flow, etc., and achieve low consumption of manufacturing materials. , Increase the output and particle size, and enhance the effect of material circulation

Inactive Publication Date: 2018-03-16
TIANJIN UNIV
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Problems solved by technology

[0002] The production of potassium chloride from carnallite mainly includes positive flotation-cold decomposition, reverse flotation-cold crystallization and thermal decomposition. The cold decomposition method is currently a commonly used method for producing potassium chloride, but it consumes a lot of water , the products produced by the thermal decomposition method have high purity and large particle size, and the requirements for carnallite ore are low, and the evaporation of water is small. However, the process flow is relatively complicated and the technical level is high.

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  • Continuous decomposition crystallization device for thermally decomposing carnallite to prepare potassium chloride
  • Continuous decomposition crystallization device for thermally decomposing carnallite to prepare potassium chloride
  • Continuous decomposition crystallization device for thermally decomposing carnallite to prepare potassium chloride

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Embodiment Construction

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0022] Such as figure 1 As shown, a continuous decomposition crystallizer 9 for producing potassium chloride by thermal decomposition of carnallite is mainly composed of a cylinder body 3 and a cover body 18. Accumulation of particles occurs, and the particles with high density can be discharged faster. The cylinder body 3 is provided with a stirring shaft 5 with a guide tube 4. In order to absorb smaller particles of potassium chloride, it is forced to accelerate the material circulation and Away from the overflow area, the stirring paddle 8 on the stirring shaft 5 is close to the bottom of the cylinder body 3, and the cover body 18 is provided with a carnallite feed port 14 and a circulating liquid feed port 15, such as figure 2 As shown, the carnallite feed port 14 and the circulating liquid feed port 15 are respectively located on both sides of the cove...

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Abstract

The invention discloses a continuous decomposition crystallization device for thermally decomposing carnallite to prepare potassium chloride. The continuous decomposition crystallization device is mainly composed of a barrel body and a cover body; a carnallite feeding opening and a circulating solution feeding opening are formed on the cover body; an annular baffle plate is arranged at the lower part of the cover body; a potassium chloride discharging opening is formed in the bottom of the barrel body; a circulating solution outlet is formed in the side part of the barrel body; an overflowingring is arranged at the upper edge of the barrel body; the bottom of the annular baffle plate is of a funnel shape. By adopting the continuous decomposition crystallization device, the discharging oflarge particles is accelerated and the yield and the granularity of a potassium chloride product are effectively increased.

Description

technical field [0001] The invention belongs to the technical field of decomposition crystallizers, in particular to a continuous decomposition crystallizer used for thermally decomposing carnallite to prepare potassium chloride. Background technique [0002] The production of potassium chloride from carnallite mainly includes positive flotation-cold decomposition, reverse flotation-cold crystallization and thermal decomposition. The cold decomposition method is currently a commonly used method for the production of potassium chloride, but it consumes a lot of water , The product produced by thermal decomposition method has high purity and large particle size, and has low requirements for carnallite ore, and the evaporation of water is small. However, its process flow is relatively complicated and requires high technical level. Decomposition crystallizer is a device used for thermal decomposition of carnallite. The carnallite slurry mixed with a certain amount of water is pu...

Claims

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Application Information

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IPC IPC(8): B01D9/02C01D3/08C01D3/14
Inventor 那平赵思源刘勇
Owner TIANJIN UNIV
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