Preparation method and device of tin powder for organic tin production

A preparation device and a technology for organotin are applied in the field of preparation of tin powder for organotin production, can solve problems such as unfavorable use, easy failure, too fine tin powder, etc., and achieve the effects of improving efficiency, avoiding oxidation and short production cycle

Inactive Publication Date: 2015-06-10
HUBEI NANXING CHEM GENERAL FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a method and device for preparing tin powder for organotin production. , thereby solving the technical problems that the existing tin powder preparation technology for organotin production is too fine to be used, and at the same time, the production efficiency is low, energy consumption is high, and failures are prone to occur

Method used

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  • Preparation method and device of tin powder for organic tin production

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preparation example Construction

[0029] A kind of tin powder preparation method for organotin production provided by the invention comprises the following steps:

[0030] (a) Melt the tin ingot with a stainless steel heating tube in a carbon steel furnace, and adjust the temperature between 320°C and 350°C to prepare molten tin.

[0031] (b) Let the molten tin pass through the tin flow channel equipped with a dispersing device, and guide it into the dispersing chamber; when the molten tin passes through the dispersing device, supply air to the molten tin, and the air volume is set at 18m 3 / min to 20m 3 / min, the wind pressure is 3500Pa to 3800Pa, to disperse the molten tin flowing from the leakage hole; the top of the dispersion chamber is ventilated to take away the heat in time. The purpose of the frequency converter in practice is 25Hz ~ 30Hz.

[0032] (c) Use cold dry compressed air to blow the uncooled dispersed tin powder to obtain tin powder for the production of organotin. The specification of the ...

Embodiment 1

[0043] A method for preparing tin powder for organotin production, comprising the following steps:

[0044] (a) In a carbon steel furnace, use a stainless steel heating tube to melt the tin ingot, and use an intelligent instrument to automatically adjust the temperature to maintain it at 320°C to obtain molten tin.

[0045] (b) Open the discharge valve so that the molten tin passes through the tin flow channel equipped with a dispersing device and enters the dispersing chamber; when the molten tin passes through the dispersing device, air is supplied to the molten tin, and the air volume is set at 18m 3 / min, with a wind pressure of 3500Pa, to disperse the molten tin flowing down from the leakage hole; a 7.5Kw exhaust fan is used to force ventilation at the top of the dispersion chamber, and the heat is removed in time. For the purpose of taking away heat, the inverter frequency is 25Hz.

[0046] (c) Use cold dry compressed air to blow the uncooled dispersed tin powder to obt...

Embodiment 2

[0056] A method for preparing tin powder for organotin production, comprising the following steps:

[0057] (a) In a carbon steel furnace, use a stainless steel heating tube to melt the tin ingot, and use an intelligent instrument to automatically adjust the temperature to maintain it at 340 ° C to obtain molten tin.

[0058] (b) Open the discharge valve so that the molten tin passes through the tin flow channel equipped with a dispersing device and enters the dispersing chamber; when the molten tin passes through the dispersing device, air is supplied to the molten tin, and the air volume is set at 20m 3 / min, with a wind pressure of 3800Pa, to disperse the molten tin flowing down from the leakage hole; a 7.5Kw exhaust fan is used to force ventilation at the top of the dispersion chamber, and the heat is taken away in time. For the purpose of taking away heat, the inverter frequency is 28Hz.

[0059] (c) Use cold dry compressed air to blow the uncooled dispersed tin powder t...

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Abstract

The invention discloses a preparation method and device of tin powder for organic tin production. The method comprises the following steps: (a) heating and melting a tin ingot, and preparing molten tin; (b) enabling the molten tin to enter a dispersion chamber through a tin flowing channel, supplying air to the molten tin to disperse the molten tin, and sucking the air at the top of the dispersion chamber; (c) cooling the dispersed molten tin in the dispersion chamber to prepare the tin powder. The device comprises a tin melting furnace, a tin flowing pipe, an air compressor, the dispersion chamber and an air suction fan, wherein the tin melting furnace is arranged above the dispersion chamber; an inlet of the tin flowing pipe is connected with the tin melting furnace; an outlet of the tin flowing pipe is arranged at an inlet of the dispersion chamber; the air compressor is arranged at the joint of the outlet of the tin flowing pipe and the inlet of the dispersion chamber; the air suction fan is arranged at the top of the dispersion chamber. According to the method and the device for organic tin production, the molten tin powder is dispersed and cooled by adopting the air, so that the relatively large particle diameter of the tin powder can be controlled, the surface of the tin powder is prevented from being oxidized, the energy consumption is low, the efficiency is high, and the molten tin is discharged smoothly.

Description

technical field [0001] The invention belongs to the field of production of polyvinyl chloride additives, and more specifically relates to a preparation method and device of tin powder for organotin production. Background technique [0002] Organotin is an efficient heat stabilizer in the process of PVC plastic processing. Polyvinyl chloride has poor thermal stability and begins to degrade at 70°C. Heat stabilizers and other chemical additives need to be added to process many hard and soft PVC mixtures at a processing temperature of 180°C-210°C. Into a large number of useful polyvinyl chloride products. [0003] Organotin stabilizer, its precursor is prepared by reacting metal tin with other gas phase and liquid phase raw materials. Metal tin can be used in powder or flake form. However, the flake processing technology is complicated, and the fluidity is not good when feeding, which is not convenient for feeding. At present, tin powder is mostly used to prepare organic ti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08
Inventor 李尖王友张武华王爱红杨智陈代清杨钰熊长春杨明敏谢继红
Owner HUBEI NANXING CHEM GENERAL FACTORY
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