FIELD: chemistry.
SUBSTANCE: invention relates to processing of calcium-containing industrial wastes of boric production. Method involves treatment of wastes of boric production with alkali metal hydroxide solution with calcium hydrosilicate formation. Treatment is carried out at ratio of solid and liquid phases 1: (7-10), in autoclave at temperature of 110-120 °C, obtained product is washed with water, filtered and dried. Then product is subjected to thermal treatment. Thermal treatment at 850-1,000 °C provides production of wollastonite. Calcination at temperature above 1,150-1,200 °C provides production of hardening additives in concrete.
EFFECT: technical result is increase of target product yield and expanded range of commercial products.
3 cl, 2 dwg, 2 ex
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