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Method for preparing barium sulfide black ash by microwave calcining method

A barium sulfide and microwave technology, applied in the direction of magnesium/calcium/strontium/barium sulfide/polysulfide, etc., can solve the problems of dust pollution reduction, environmental pollution, etc., to reduce dust pollution, solve environmental pollution problems, and reduce energy consumption low cost effect

Pending Publication Date: 2022-05-06
南风化工(运城)集团有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process has high energy utilization efficiency, simple tail gas treatment, greatly reduced dust pollution, and realized the substitution of clean energy. The production site cleaning problem of ash preparation, so it has a wide application prospect in the existing barium sulfide black ash preparation industry

Method used

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  • Method for preparing barium sulfide black ash by microwave calcining method

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Effect test

example 1

[0017] Accurately weigh 5 kg of barite and 1.3 kg of raw coal and crush them into granules that meet the requirements. The barite particles pass through a 5 mm sieve, the content of barium sulfate in the barite is 76.2%, and the raw coal passes through a 3 mm sieve. Fixed carbon 66.9%; The raw materials after above-mentioned crushing are mixed, obtain 6.3 kilograms of mixtures. Put the mixed material into the feeding conveying device of the vertical rotary microwave calciner used in the laboratory, adjust the feeding speed, the temperature of the material rises to 1280 ° C, and the residence time in the furnace cavity is 25 minutes. Finally, 4.1 kg of barium sulfide black ash is obtained. Ash contains 65.2% barium sulfide.

example 2

[0019] Accurately weigh 1,000 kg of barite and 260 kg of raw coal and crush them into granules that meet the requirements. The barite particles pass through a 5 mm sieve, the content of barium sulfate in the barite is 78.5%, and the raw coal passes through a 3 mm sieve. Fixed carbon 66.9%; the above crushed raw materials were mixed to obtain 1260 kg of mixed material. Put the mixed material into the vertical rotary microwave calciner feeding conveying device for pilot production, adjust the feeding speed, the temperature of the material rises to 1200 °C, and the residence time in the furnace cavity is 30 minutes, finally 817 kg of barium sulfide black ash is obtained, which is measured Black ash contains 65.8% barium sulfide.

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Abstract

The invention mainly relates to a technology for preparing barium sulfide black ash by using a mixture of microwave calcined barite and feed coal. Barium sulfide black ash is prepared by adopting a method for calcining barite and feed coal through microwaves, proper calcining temperature and calcining time are finally obtained through test adjustment, and the barium sulfide black ash meeting the production requirement of barium sulfate is successfully prepared. The process technology can replace the traditional rotary furnace process to produce the barium sulfide black ash, realizes replacement of clean energy, reduces the tail gas treatment cost of the rotary furnace, and has obvious environmental protection advantages and cost advantages.

Description

technical field [0001] The invention mainly relates to a technology for preparing barium sulfide black ash by using microwave calcined barite and raw coal mixture. Background technique [0002] The principle of microwave technology is that a substance is composed of a part of polar molecules and non-polar molecules. Under the action of a magnetic field, when a polar molecular dielectric and a non-polar molecular dielectric are placed in a microwave electromagnetic field, a dipole will be formed in the dielectric material. Or the existing dipoles rearrange and swing with the high-frequency alternating electromagnetic field at a speed of up to hundreds of millions of times per second. If the molecules want to rearrange with the direction of the constantly changing high-frequency electric field, they must overcome the original structure of the molecules. The interference and hindrance of thermal motion and molecular interaction will produce an effect similar to friction. This p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/44
CPCC01B17/44
Inventor 田利鹏王兰君廉根旺
Owner 南风化工(运城)集团有限公司