SU1701668A1 - Method of producing calcium sulfate (@@@-half-water) from phosphogypsum - Google Patents

Method of producing calcium sulfate (@@@-half-water) from phosphogypsum Download PDF

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Publication number
SU1701668A1
SU1701668A1 SU894714869A SU4714869A SU1701668A1 SU 1701668 A1 SU1701668 A1 SU 1701668A1 SU 894714869 A SU894714869 A SU 894714869A SU 4714869 A SU4714869 A SU 4714869A SU 1701668 A1 SU1701668 A1 SU 1701668A1
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SU
USSR - Soviet Union
Prior art keywords
phosphogypsum
calcium sulfate
water
producing calcium
neutralizer
Prior art date
Application number
SU894714869A
Other languages
Russian (ru)
Inventor
Джалол Камалович Адылов
Насретдин Абрарович Сиражиддинов
Хикматулла Лутфуллаевич Усманов
Дилдора Султановна Тургунова
Герман Петрович Николаев
Original Assignee
Институт Химии Ан Узсср
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Application filed by Институт Химии Ан Узсср filed Critical Институт Химии Ан Узсср
Priority to SU894714869A priority Critical patent/SU1701668A1/en
Application granted granted Critical
Publication of SU1701668A1 publication Critical patent/SU1701668A1/en

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Description

Изобретение относитс  к промышленности строительных материалов и может использоватьс  дл  получени  /3 -полугидратв сульфата кальци  из фосфогипса.The invention relates to the building materials industry and can be used to obtain p-hemihydrate calcium sulphate from phosphogypsum.

Цель изобретени  - повышение прочности .The purpose of the invention is to increase the strength.

Пример. Фосфогипс Алмалыкского химического завода подвергали репульпа- ции в растворе, содержащем хлорид бари  в количестве 0,125-1,0% от массы сухого фосфогипса. Обработанную смесь влажностью 30-40% высушивали до достижени  влажности 1-3%. Высушеннный продукт дегидратировали при температуре 200°С в течение 2 ч до получени  /3-полугидрата сульфата кальци . Полученное в жущее затвор ли водой и испытывали по ГОСТ 23789-79.Example. The phosphogypsum of the Almalyk chemical plant was repulped in a solution containing barium chloride in an amount of 0.125-1.0% by weight of dry phosphogypsum. The treated mixture with humidity of 30-40% was dried until reaching a moisture content of 1-3%. The dried product was dehydrated at 200 ° C for 2 hours to give calcium sulfate 3-hemihydrate. The resulting water was shut and tested according to GOST 23789-79.

Состав раствора и свойства ft -полугидрата сульфата кальци  приведены в таблице .The composition of the solution and the properties of ft-calcium sulfate hemihydrate are given in the table.

Изготовление в жущего по предлагаемому способу позвол ет повысить его прочность при сжатии на 12,9-69,4%, а при изгибе на 20,0-70,0%.Manufacturing a tamper by the proposed method allows to increase its compressive strength by 12.9-69.4%, and during bending by 20.0-70.0%.

Claims (1)

Формула изобретени Invention Formula Способ получени  ft -полугидрата сульфата кальци  из фосфогипса, включающий репульпацию с добавлением нейтрализатора , фильтрацию полученной пульпы, последующую сушку до влажности 1-3% и дегидратацию, отличающийс  тем, что, с целью упрощени  технологического процесса и повышени  прочности, в качестве нейтрализатора используют BaCIa в количестве 0.125-1.0% от сухой массы фосфогипса.The method of obtaining ft-calcium sulfate hemihydrate from phosphogypsum, including repulping with the addition of a neutralizer, filtering the resulting pulp, subsequent drying to a moisture content of 1-3% and dehydration, characterized in that, to simplify the process and increase strength, BaCIa is used as a neutralizer in the amount of 0.125-1.0% of the dry weight of phosphogypsum. VIVI ОABOUT СК О 00SK O 00
SU894714869A 1989-07-06 1989-07-06 Method of producing calcium sulfate (@@@-half-water) from phosphogypsum SU1701668A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU894714869A SU1701668A1 (en) 1989-07-06 1989-07-06 Method of producing calcium sulfate (@@@-half-water) from phosphogypsum

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU894714869A SU1701668A1 (en) 1989-07-06 1989-07-06 Method of producing calcium sulfate (@@@-half-water) from phosphogypsum

Publications (1)

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SU1701668A1 true SU1701668A1 (en) 1991-12-30

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SU894714869A SU1701668A1 (en) 1989-07-06 1989-07-06 Method of producing calcium sulfate (@@@-half-water) from phosphogypsum

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LT5939B (en) 2011-07-15 2013-05-27 Vilniaus Gedimino technikos universitetas Structural thermal insulation composite from local technogenic waste

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Авторское свидетельство СССР № 1375605. кл. С 04 В 11/00. 1988 Авторское свидетельство СССР Ne 1224287. кл. С 04 В 11/00. 1986. *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LT5939B (en) 2011-07-15 2013-05-27 Vilniaus Gedimino technikos universitetas Structural thermal insulation composite from local technogenic waste

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