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Method for producing grain sizes even distributed antimony trioxide in single crystal type, and equipment

A technology of antimony trioxide and particle size distribution, which is applied in the direction of single crystal growth, single crystal growth, chemical instruments and methods, etc., can solve the problems of large fluctuation range, wide particle size distribution, poor adaptability of raw materials, etc., and achieve raw material adaptability The effect of strong ability, large safety factor, and strong adaptability of raw materials

Active Publication Date: 2006-12-06
广西华锑科技有限公司
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Problems solved by technology

However, the cubic crystal content of its products can only reach more than 99%, and there is a wide particle size distribution, and an irregular peak shape, a large fluctuation range, many foreign matters (black spots) with a particle size greater than 0.1 μm, and poor raw material adaptability. Generally, it can only be produced with high-purity antimony ingots, and it is difficult to meet high-end user requirements.

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  • Method for producing grain sizes even distributed antimony trioxide in single crystal type, and equipment

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Embodiment

[0019] Below are embodiments of the present invention:

[0020] Example 1 at 6m 2 On the antimony white furnace, use 4 windpipes (9) to blow the air volume to 200m3 / h, and the cooling air entering the crystallizer is divided into 3 levels, wherein the cooling air of the first level is air, and the flow rate is 2.5 times of the furnace gas, 2, 3 The first-stage cooling air is compressed air, the pressure is 0.4-0.6MPa, and the flow rate is 100m3 / h; the cooling air entering the reactor is 1000m 3 / h, collect monocrystalline antimony trioxide with uniform particle size distribution in a bag filter. Using No. 2 antimony ingot with a Sb content of 98.65% as raw material, the daily output of antimony trioxide products is 19.5 tons, the single cubic crystal form is more than 99.5%, the particle size distribution is normal and unimodal, and the average Fischer particle size is 0.90 μm, 325 mesh sieve residue is 0.002%, whiteness is 99.1, chemical composition is Sb 2 o 3 99.6%, Pb...

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Abstract

This invention discloses method and equipment for producing Sb203 single crystal with evenly-distributed particle sizes. The method comprises: (1) melting Sb metal in a reverberatory antimony trioxide furnace, and introducing air to the Sb melt surface in the furnace to oxidize Sb into Sb203 vapor; (2) introducing to a wind-blowing reactor and a crystallizer in sequence for three-step cooling and crystallization; (3) discharging through the output pipe of the furnace, and collecting with a dust-collecting system to obtain Sb203 single crystal powder with an average particle size of 0.2-3.5 mum, Sb203 content of 99.6% and whiteness higher than 98.5%. The method has such advantages as high yield, low energy consumption, long furnace service life, high automation degree, stable operation and wide raw material resources.

Description

technical field [0001] The invention relates to a method for producing antimony trioxide superfine powder by a fire method, in particular to a production method and a device for producing antimony trioxide with single crystal and uniform particle size distribution. Background technique [0002] Antimony trioxide (antimony white) is an important chemical raw material. As a synergist of organic halide flame retardants, it is widely used in modern industries such as construction, plastics, rubber, paint, and chemical fiber. However, with the advancement of science and technology and the development of the national economy, the industry has put forward more requirements for the quality of antimony trioxide, especially antimony trioxide with a single product type and uniform particle size distribution. Its activity, good dispersibility, uniform coloring strength and strong light stability are favored by high-end users, and its price is more than 10% higher than that of ordinary q...

Claims

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Application Information

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IPC IPC(8): C30B23/00C30B29/16C01G30/00C22B30/02
Inventor 王涛石建荣潘善初黄卫青
Owner 广西华锑科技有限公司
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