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

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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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 by burning lime is passed into the barium sulfide aqueous solution; Add barium sulfide aqueous solution to make barium sulfate products, so that the discharged flue gas still pollutes the environment, and also increases the production cost

[0005] In addition, the industrial waste slag produced during the barium leaching process also contains a certain amount of barium sulfide. If it is not treated, it will also cause waste slag pollution; the barium leaching wastewater is discharged randomly to cause waste water pollution; therefore, it forms three wastes pollution of waste gas, waste water and waste residue

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