Production method of large-particle-size antimonous oxide

A technology of antimony trioxide and production methods, which is applied in chemical instruments and methods, inorganic chemistry, antimony compounds, etc. It can solve the problems of large-grained crystals, easy deposition at the bottom of pipelines, and failure to meet production requirements. High direct yield, good and stable quality, and the effect of increasing the number of crystal nuclei produced

Active Publication Date: 2014-07-23
广西华锑科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method has certain disadvantages: when the horizontal cooling crystallizer is used, the coarse grained crystals are easy to deposit at the bottom of the pipeline, forming scaling or even blocking the pipeline, resulting in production interruption, resulting in many production processes, low production capacity, and low direct recovery rate. , high production cost and complex equipment
But after this kind of improvement still can't meet current production requirement

Method used

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  • Production method of large-particle-size antimonous oxide

Examples

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Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: Using No. 2 antimony ingot with a Sb content of 98.66% as raw material, the daily output of antimony trioxide products with large particle size is 18.2 tons, the average particle size is 2.5 μm and the particle size distribution is unimodal, and the main component is Sb 2 o 3 The steps of the production method of the antimony trioxide product of 99.65%, 325 mesh sieve residue less than 0.003%, and chroma L value of 98.7 are:

[0022] ①Use a diesel burner to raise the temperature of the 6m2 antimony white furnace (1) to 1000°C, then put metal antimony into the furnace to melt it into antimony liquid, and keep the temperature of the antimony liquid at 900°C;

[0023] ②Through 1 air pipe (2) installed on the top of the antimony white furnace (1) and 4 air pipes (2) installed on the furnace wall, the top blowing and side blowing are respectively blown into the antimony liquid surface to oxidize the antimony volatilize while maintaining the furnace temperature at...

Embodiment 2

[0026] Example 2: Using No. 2 antimony ingot with a Sb content of 98.66% as raw material, the daily output of antimony trioxide products with large particle size is 20.1 tons, the average particle size is 3.4 μm and the particle size distribution is a single peak, and the main component is Sb 2 o 3 The steps of the production method of the antimony trioxide product of 99.67%, 325 mesh sieve residue less than 0.003%, and chroma L value of 98.4 are:

[0027] ①Use a diesel burner to raise the temperature of the 6m2 antimony white furnace (1) to 1000°C, then put metal antimony into the furnace to melt it into antimony liquid, and keep the temperature of the antimony liquid at 950°C;

[0028] ②Through 1 air pipe (2) installed on the top of the antimony white furnace (1) and 4 air pipes (2) installed on the furnace wall, the top blowing and side blowing are respectively blown into the antimony liquid surface to oxidize the antimony volatilize while maintaining the furnace temperatu...

Embodiment 3

[0031] Example 3: Using No. 2 antimony ingot with a Sb content of 98.66% as raw material, the daily output of antimony trioxide products with large particle size is 19.7 tons, the average particle size is 4.5 μm and the particle size distribution is a single peak, and the main component is Sb 2 o 3 The steps of the production method of the antimony trioxide product with 99.61%, 325 mesh sieve residue less than 0.003%, and chromaticity L value of 98.1 are:

[0032] ①Use a diesel burner to raise the temperature of the 6m2 antimony white furnace (1) to 1000°C, then put metal antimony into the furnace to melt it into antimony liquid, and keep the temperature of the antimony liquid at 1000°C;

[0033] ②Through 1 air pipe (2) installed on the furnace top of the antimony white furnace (1) and 4 air pipes (2) installed on the furnace wall, the top blowing and side blowing are respectively blown into the antimony liquid surface to oxidize the antimony volatilize while maintaining the ...

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Abstract

The invention discloses a production method of large-particle-size antimonous oxide, which adopts a reflection-type antimony white furnace for melting. The production method comprises the following steps in sequence: (a) increasing the temperature of the antimony white furnace (1) to be 1000 DEG C by a diesel burner, and then putting metallic antimony in the furnace so as to melt the metallic antimony into antimony liquid; (b) blowing top-blown wind and side-blown wind to the antimony liquid surface respectively through wind pipes (2) arranged on the top and the walls of the antimony white furnace (1) so as to oxidize antimony for volatilization, introducing furnace gas into a reaction room (3) to conduct oxidation reaction; (c) guiding high-temperature furnace gas out from the reaction room (3), then introducing the high-temperature furnace gas into a circular multi-baffle crystallizer (6), and simultaneously, blowing cooling air to the circular multi-baffle crystallizer (6) so as to control the crystallization temperature to be 500-600 DEG C; and (d) cooling crystalline particles by a cooling tower (5) again, and finally, collecting finished products by a dust collector (7). According to the method, the working procedures are simple, the process is short, the degree of automation is high, the production and the operation can be controlled stably, and the direct recovery rate of the product is high.

Description

technical field [0001] The invention belongs to the field of methods for producing antimony trioxide by fire method, and in particular relates to a production method of antimony trioxide with large particle size and high direct yield. Background technique [0002] Antimony oxide is a high-performance flame retardant synergistic additive, widely used in electronic appliances, automobiles, textiles, communications, military and other fields. Large particle size (low tinting strength antimony oxide) is a high-end antimony oxide product with an average particle size greater than 2.1 μm. Because of its high flame retardant efficiency and low dosage, it has little effect on the performance of the material and the amount of color masterbatch added, and is very cost-effective. It is comparable to other flame retardants, and it is specially used in dark or colored flame-retardant plastics, resins, and textiles, so the international market price of this product is much higher than tha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G30/00
Inventor 石建荣刁守国王松林韦华马柳军童张法崔学民陆建平黄祖强
Owner 广西华锑科技有限公司
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