Method of producing barium sulfide and flue gas by calcining coal and barite to synthesize barium carbonate

A barium sulfide and flue gas technology, applied in the direction of calcium carbonate/strontium/barium, etc., can solve the problems of waste water pollution, waste of resources, air pollution, etc., and achieve the effects of reducing costs, improving comprehensive economic benefits, and saving energy

Inactive Publication Date: 2006-03-29
陆巧芳
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Problems solved by technology

The defect of using this traditional method to produce barium salt products is that in the process of roasting barite, a large amount of carbon dioxide gas and a small amount of dusty flue gas will be produced, and these flue gases will be discharged into the atmosphere in vain It will not only cause serious pollution to the atmosphere, but also waste resources that could have been recycled
[0004] Moreover, the source of carbon dioxide gas needed in the process of producing barium carbonate products is generally to build a lime kiln when the roasting converter is built, and the carbon dioxide gas produced b

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  • Method of producing barium sulfide and flue gas by calcining coal and barite to synthesize barium carbonate

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[0028] The process has achieved ideal results through small test, pilot test and industrial test. The coal and barite are crushed into particles below 1.5 cm in a ratio of 3:1, and 0.5 tons of coal and 1.5 tons of barite are sent to the converter for roasting. At a high temperature of 1100 ° C, after 1.5 hours, Barite is reduced to barium sulfide, and flue gas is generated at the same time; one ton of barium sulfide is soaked with three tons of water to make barium sulfide aqueous solution; the flue gas is purified to obtain pure carbon dioxide gas, and the carbon dioxide gas is passed into the barium sulfide aqueous solution The main products are barium carbonate and hydrogen sulfide waste gas; the hydrogen sulfide gas produced in the synthesis is oxidized and reduced to produce sulfur, which further controls the pollution of the waste gas to the atmosphere. The barium slag contains a small amount of barium sulfide, which is reduced to barium sulfate and ferrous sulfide with ...

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Abstract

A process for preparing barium carbonate from coal and barite includes such steps as pulverizing coal and barite, mixing in ratio of 1: 3, calcining in rotary furnace to generate barium sulfide and fume containing CO2 and ash, immersing barium sulfide in water to become aqueous solution, cleaning the fume to obtain CO2 gas, filling it in said aqueous solution of barium sulfide, and reaction to obtain barium carbonate.

Description

Technical field: [0001] The invention relates to the technical field of barium carbonate in inorganic chemistry, and relates to a method for synthesizing barium carbonate by roasting coal and barite to produce barium sulfide and flue gas. Background technique: [0002] Barium salt, a chemical product, has a unique and irreplaceable role in the construction of the national economy. It is widely used in industries such as enamel, ceramics, metallurgy, optical glass, medicine, and pesticides. Barium salt is also a very good product. With the development of the economy, the market demand for foreign exchange-earning products will increase day by day. [0003] At present, barium salt products are produced by the traditional process method, and barite is used as raw material. The main component of barite is barium sulfate. After roasting for redox reaction, it is reduced to barium sulfide. Then use the carbon dioxide gas produced by burning lime in the lime kiln to pass through t...

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Application Information

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IPC IPC(8): C01F11/18
Inventor 乔万君马红圈张来现穆善庆陆巧芳
Owner 陆巧芳
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