Industrial production method for strontium carbonate

Abstract

The invention discloses an industrial production method for strontium carbonate. The industrial production method comprises the following steps: soaking a material obtained by carrying out carbon reduction on celestite, with high-temperature hot water to prepare a strontium sulfide solution; introducing a sufficient amount of pure carbon dioxide gas to a carbonization tower, and pumping the strontium sulfide solution to the carbonization tower at a reaction pressure of 0.3Mpa; controlling to continuously react for 30 to 40 minutes and then discharging liquid; dehydrating the liquid, and drying till the moisture content of the product is less than 0.1 percent. According to the industrial production method for strontium carbonate, the strontium carbonate which has the advantage particle size being less than 1.5 mu m, and the total sulfur amount being less than 0.16 percent can be produced; the industrial production method is simple in process method, low in cost and high in efficient, wherein the pure carbon dioxide is adopted to overcome the defects of instable flow and instable quality of gas produced from a lime kiln; existing carbonization equipment in the company is adopted, and flexible production adjustment can be performed by adopting a single-tower or three-tower series manner in a targeted manner according to different demands of different users to physical indexes and chemical indexes of the product.

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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