Industrial production method for strontium carbonate

Abstract

The invention discloses an industrial production method of strontium carbonate. The material obtained by reducing celestite with carbon is soaked in high-temperature hot water to prepare a strontium sulfide solution; sufficient pure carbon dioxide gas is introduced into the carbonization tower, and the Strontium sulfide solution is pumped into the carbonization tower, and the reaction pressure is 0.3Mpa; the continuous reaction time is controlled for 30-40 minutes, and the feed liquid is released; the feed liquid is dehydrated, and then dried until the product moisture is less than 0.1%. An industrial production method of strontium carbonate of the present invention can produce strontium carbonate with an average particle size of less than 1.5um and a total sulfur content of less than 0.16%. The disadvantages of unstable gas flow and unstable quality; using the company's existing carbonization equipment, according to the different needs of different users for the physical and chemical indicators of the product, it can be targeted to use a single tower or three towers in series for flexible production adjust.

Description

technical field [0001] The invention belongs to the technical field of strontium carbonate preparation, and in particular relates to an industrial production method of strontium carbonate. Background technique [0002] Strontium carbonate is mainly used in the fields of electronics, magnetic materials, fluorescent materials and military products. The content of strontium carbonate and total sulfur impurities in the product powder is very important for the development and applicability of the application field. The process of producing strontium carbonate from celestite ore mainly adopts the carbon reduction method. Specifically, the carbon dioxide kiln gas produced by calcination of limestone in a lime kiln is used to react with the aqueous solution of strontium sulfide from celestite after calcination and reduction and leaching. In the production of strontium carbonate products, the average particle size of the products produced by this process is generally 2.0um, expressed...

AI Technical Summary

Problems solved by technology

The process of producing strontium carbonate from celestite ore mainly adopts the carbon reduction method. Specifically, the carbon dioxide kiln gas produced by calcination of limestone in a lime kiln is used to react with the aqueous solution of strontium sulfide from celestite after calcination and reduction and leaching. In the production of strontium carbonate products, the average particle size of the products produced by this process is generally 2.0um, expressed as SO 3 2- The average value of the calculated total sulfur is generally 0.3%. This grade of strontium carbonate can only meet the needs of ordinary strontium carbonate users, and the added value of the product is not high. Although the use of small particle size and low sulfur strontium carbonate can greatly improve its own The performance of the product, but to reduce the particle size and total sulfur content of the product, the existing technology requires complex processes and huge costs, and the efficiency is low

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