Санкт-Петербургский горный университет императрицы Екатерины II, Санкт-Петербург, РФ

Зубкова О. С., старший научный сотрудник, канд. техн. наук, Сhurkina_OS@pers.spmi.ru

Торопчина М. А., аспирант, s225038@stud.spmi.ru

Панкратьева К. А., магистрант, s232464@stud.spmi.ru

Проведены исследования по переработке сапонитовой глины — побочного продукта обогащения алмазов Ломоносовского месторождения. Ее основной минерал — сапонит — содержит около 33 % мас. магния в пересчете на оксид, который извлекается кислотным выщелачиванием при последовательной обработке соляной кислотой, аммиаком и гидрофосфатом натрия. Выход целевого продукта — фосфата магния — с учетом потерь и экономической эффективности составил 82 %. Установлено, что выщелачивание соляной кислотой приводит к разрушению кристаллической решетки сапонита и способствует переводу магния в растворимую форму (например, сульфат, хлорид или фосфат). Составлена принципиальная блок-схема способа получения фосфата магния из сапонита.

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