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Dynamic crystallization technological method and device for stannous chloride solution

A technology of stannous chloride and crystallization device, applied in the directions of stannous chloride, tin halide, etc., can solve the problems of low crystallization temperature, high product hardness, low production efficiency, etc. The effect of increasing efficiency

Active Publication Date: 2011-07-13
广西华锡集团股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Static crystallization requires a lower crystallization temperature (5-10°C) and a longer crystallization time (48h). The crystallized product has high hardness and is difficult to break. The product has uneven particle size and poor appearance.
At the same time, the heat transfer efficiency of the cold storage is low and takes up a lot of space. Hydrochloric acid corrodes the cold storage equipment and the ground greatly, resulting in low production efficiency and high cost.

Method used

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  • Dynamic crystallization technological method and device for stannous chloride solution
  • Dynamic crystallization technological method and device for stannous chloride solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: put 1200 liters of tin protochloride concentrated solution under the condition of 40~60 ℃ into the rotary crystallizer, feed the coolant into the jacket of the rotary crystallizer, start the rotary crystallizer, and control the crystallization process during the whole crystallization process. The temperature difference between the stannous chloride concentrate and the coolant is 5-10°C, and the rotating speed of the rotary crystallizer is 2 r / min. After 20 hours, the crystallization temperature reaches 10°C. After the crystallization is completed, the material is discharged, dried and packaged to obtain 1.925 tons of product , The crystallization rate was 79.4%.

Embodiment 2

[0025] Embodiment 2: put 1220 liters of tin protochloride concentrated solution under the condition of 40~60 ℃ into the rotary crystallizer, feed the coolant into the jacket of the rotary crystallizer, start the rotary crystallizer, and control the crystallization process during the whole crystallization process. The temperature difference between the stannous chloride concentrate and the coolant is 5-10°C, and the rotation speed of the rotary crystallizer is 3 r / min. After 21 hours, the crystallization temperature reaches 8°C. After the crystallization is completed, the material is discharged, dried and packaged to obtain 2.05 tons of the product , The crystallization rate was 79.6%.

Embodiment 3

[0026] Embodiment 3: Put 1190 liters of tin protochloride concentrated solution under the condition of 40~60 ℃ into the rotary crystallizer, feed the coolant into the jacket of the rotary crystallizer, start the rotary crystallizer, and control the crystallization process during the whole crystallization process. The temperature difference between the stannous chloride concentrate and the coolant is 5-10°C, and the rotation speed of the rotary crystallizer is 4 r / min. After 19.5 hours, the crystallization temperature reaches 9°C. After the crystallization is completed, the material is discharged, dried and packaged to obtain 2.125 tons of the product , The crystallization rate is 78.7%.

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Abstract

The invention relates to a dynamic crystallization technological method and device for a stannous chloride solution. The technological method comprises the following steps of: A, adding a stannous chloride concentrated solution into rotation equipment with a clamping sleeve; B, introducing a coolant into the clamping sleeve of the rotation equipment; C, starting the rotation equipment, controlling the rotation speed of the rotation equipment to be 2-5r / min, and controlling the temperature difference between the stannous chloride concentrated solution and the coolant in the whole crystallizing process to be 5-10 DEG C, and D, ending crystallization when the concentration temperature T of stannous chloride is not more than 10 DEG C, stopping introduction of the coolant and the rotation equipment, spinning to dry slurry crystal in the rotation equipment in a centrifuger, and packaging to obtain a product of the stannous chloride. In the invention, the traditional static crystallization mode of the stannous chloride solution is changed into a dynamic crystallization mode, and the advantages of improved production efficiency, high crystallization rate, uniform particle sizes of stannous chloride crystals and simplified crystallization production process are achieved.

Description

technical field [0001] The invention relates to a crystallization process method and device for stannous chloride solution in the process of preparing stannous chloride. Background technique [0002] Cooling crystallization is stannous chloride (SnCl 2 2H 2 O) One of the main processes of production, which has a relatively large impact on product quality. For a long time, in the cooling crystallization process of preparing stannous chloride process, all adopt static crystallization mode, promptly put stannous chloride solution into plastic bucket and put into cold storage, rely on cold storage to stannous chloride solution Perform cooling crystallization. Static crystallization requires a lower crystallization temperature (5-10°C) and a longer crystallization time (48h). The crystallized product has high hardness and is difficult to break. The product has uneven particle size and poor appearance. At the same time, the heat transfer efficiency of the cold storage is low, ...

Claims

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Application Information

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IPC IPC(8): C01G19/06
Inventor 叶有明林家伟农永萍伍祥武黄献勇陈进中阮桦廖春图王运龙曾文凌宏光
Owner 广西华锡集团股份有限公司
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