RU2002127054A - METHOD FOR PRODUCING CALCIUM OXIDE - Google Patents

METHOD FOR PRODUCING CALCIUM OXIDE

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Publication number
RU2002127054A
RU2002127054A RU2002127054/12A RU2002127054A RU2002127054A RU 2002127054 A RU2002127054 A RU 2002127054A RU 2002127054/12 A RU2002127054/12 A RU 2002127054/12A RU 2002127054 A RU2002127054 A RU 2002127054A RU 2002127054 A RU2002127054 A RU 2002127054A
Authority
RU
Russia
Prior art keywords
calcium
solution
calcium oxide
calcium carbonate
producing calcium
Prior art date
Application number
RU2002127054/12A
Other languages
Russian (ru)
Other versions
RU2214966C1 (en
Inventor
Леонид Алексеевич Поляков
Алексей Николаевич Татаринов
Юрий Александрович Монастырев
Людмила Николаевна Изовская
Татьяна Геннадьевна Киселева
Луиза Яковлевна Коноплина
Original Assignee
Федеральное государственное унитарное предприятие "Комбинат "Электрохимприбор"
Filing date
Publication date
Application filed by Федеральное государственное унитарное предприятие "Комбинат "Электрохимприбор" filed Critical Федеральное государственное унитарное предприятие "Комбинат "Электрохимприбор"
Priority to RU2002127054/12A priority Critical patent/RU2214966C1/en
Priority claimed from RU2002127054/12A external-priority patent/RU2214966C1/en
Application granted granted Critical
Publication of RU2214966C1 publication Critical patent/RU2214966C1/en
Publication of RU2002127054A publication Critical patent/RU2002127054A/en

Links

Claims (1)

Способ получения оксида кальция из концентрата, включающий растворение его в соляной кислоте, очистку раствора от примесей осаждением кальция в аммиачной среде в присутствии винной кислоты, отделением осадка, его прокаливанием и растворением в кислоте, осаждение из очищенного раствора карбоната кальция раствором аммиака, насыщенным карбонатом аммония, отделение осадка карбоната кальция и его термообработку в две стадии, отличающийся тем, что очистку раствора проводят в два этапа, при этом кальций осаждают в виде оксалата, прокаленный оксалат растворяют при рН 2-3 и на втором этапе предварительно отделяют примеси тяжелых металлов в виде сульфидов, а термообработку карбоната кальция проводят при 200-300°С и 800-850°С.A method of producing calcium oxide from a concentrate, including dissolving it in hydrochloric acid, purifying the solution from impurities by precipitating calcium in an ammonia medium in the presence of tartaric acid, separating the precipitate, calcining it and dissolving in acid, precipitating ammonia saturated with ammonium carbonate from a purified calcium carbonate solution the separation of the precipitate of calcium carbonate and its heat treatment in two stages, characterized in that the solution is purified in two stages, while calcium is precipitated in the form of oxalate, calcined about Xalate is dissolved at pH 2-3, and in the second stage, impurities of heavy metals in the form of sulfides are preliminarily separated, and the heat treatment of calcium carbonate is carried out at 200-300 ° С and 800-850 ° С.
RU2002127054/12A 2002-10-10 2002-10-10 Method for preparing calcium oxide RU2214966C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU2002127054/12A RU2214966C1 (en) 2002-10-10 2002-10-10 Method for preparing calcium oxide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU2002127054/12A RU2214966C1 (en) 2002-10-10 2002-10-10 Method for preparing calcium oxide

Publications (2)

Publication Number Publication Date
RU2214966C1 RU2214966C1 (en) 2003-10-27
RU2002127054A true RU2002127054A (en) 2004-05-27

Family

ID=31989447

Family Applications (1)

Application Number Title Priority Date Filing Date
RU2002127054/12A RU2214966C1 (en) 2002-10-10 2002-10-10 Method for preparing calcium oxide

Country Status (1)

Country Link
RU (1) RU2214966C1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105540634A (en) * 2015-12-28 2016-05-04 常熟市宏宇钙化物有限公司 Preparation method of high-purity calcium oxide

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