Method for preparing high-quality strontium carbonate

Abstract

The invention offers a new kind of method producing strontium carbonate using lazurite mineral as raw material. Mix lazurite breeze with reduced iron powders in certain proportion to get black ash, dip black ash in water of opposite flow and get strontium carbonate solution; regard calcined soda as carburizer, make them reactivate at temperature of 90-100deg.C under mixing to form slurry including deposition of strontium carbonate and sodium sulfide solution of low iron, and get deposition of strontium carbonate and sodium sulfide solution of low iron through separating solid and liquid, absterge strontium carbonate with water of opposite flow for 3-5 times, dry it and get product of strontium carbonate of high quality; Mother liquor absterging strontium carbonate for the first time mixes with centrifugal mother liquor of slurry of strontium carbonate and the mixed solution is vaporized by cold boiler which regards heat transfer oil as medium, get byproduct of sodium sulfide of low iron. The producing craft of the invention is simple, the procedure is short with low cost, the investment of equipment is small, quality of main product and byproduct is high, it has a good economical effect.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to a method for preparing high-quality strontium carbonate, in particular to a method for producing high-quality strontium carbonate products using celestite ore as a raw material. Background technique [0002] Strontium carbonate is the most important strontium salt product, which is mainly used in the production of color display glass bulbs, magnetic materials, pyrotechnics, etc. The application fields involve electronics, materials, chemical industry, sugar, metallurgy, military industry, etc. The production technology of strontium carbonate mainly comprises black ash method (being carbon reduction method) and metathesis method, but because metathesis method needs to consume a large amount of chemical products (acid, alkali, salt etc.), technological process is long, and product purity is lower, and cost is relatively high. High disadvantages, rarely used in industrial production. ...

AI Technical Summary

Problems solved by technology

Since the by-produced carbon dioxide gas in the carbon reduction process contains more impurities and solid dust, it becomes more troublesome to react with the mother liquor of sodium sulfide to synthesize soda ash, and the quality of the synthesized soda ash may not be suitable for the production of strontium carbonate.