JPS55162426A - Manufacture of alpha-type hemihydrate gypsum - Google Patents

Manufacture of alpha-type hemihydrate gypsum

Info

Publication number
JPS55162426A
JPS55162426A JP7039279A JP7039279A JPS55162426A JP S55162426 A JPS55162426 A JP S55162426A JP 7039279 A JP7039279 A JP 7039279A JP 7039279 A JP7039279 A JP 7039279A JP S55162426 A JPS55162426 A JP S55162426A
Authority
JP
Japan
Prior art keywords
gypsum
slurry
type hemihydrate
hemihydrate gypsum
magnesium sulfate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP7039279A
Other languages
Japanese (ja)
Other versions
JPS6353142B2 (en
Inventor
Hiroyuki Matsumura
Tatsusaburo Nakamura
Taisuke Shibata
Yasuo Nozaki
Kenji Kamei
Jun Fukui
Moritsugu Imai
Toshio Takahata
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kawasaki Heavy Industries Ltd
Original Assignee
Kawasaki Heavy Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kawasaki Heavy Industries Ltd filed Critical Kawasaki Heavy Industries Ltd
Priority to JP7039279A priority Critical patent/JPS55162426A/en
Publication of JPS55162426A publication Critical patent/JPS55162426A/en
Publication of JPS6353142B2 publication Critical patent/JPS6353142B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To form α-type hemihydrate gypsum having high mechanical strength in hydration curing without using an org. habit modifier by hydrothermally treating a gypsum slurry and magnesium sulfate under suitable operational conditions.
CONSTITUTION: Finely powdered natural gypsum or chemical gypsum as starting material is fed into a completely mixing system converter together with magnesium sulfate 1W10% and fresh water so that the gypsum concn. of the resulting slurry becomes 15W50wt%. By continuously converting the slurry at a slurry temp. of 110W150°C for an average retention time of 3W7hr enlarged prismatic crystals of α-type hemihydrate gypsum with a length to diameter ratio of about 5W15 are stably formed.
COPYRIGHT: (C)1980,JPO&Japio
JP7039279A 1979-06-05 1979-06-05 Manufacture of alpha-type hemihydrate gypsum Granted JPS55162426A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7039279A JPS55162426A (en) 1979-06-05 1979-06-05 Manufacture of alpha-type hemihydrate gypsum

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7039279A JPS55162426A (en) 1979-06-05 1979-06-05 Manufacture of alpha-type hemihydrate gypsum

Publications (2)

Publication Number Publication Date
JPS55162426A true JPS55162426A (en) 1980-12-17
JPS6353142B2 JPS6353142B2 (en) 1988-10-21

Family

ID=13430118

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7039279A Granted JPS55162426A (en) 1979-06-05 1979-06-05 Manufacture of alpha-type hemihydrate gypsum

Country Status (1)

Country Link
JP (1) JPS55162426A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63274615A (en) * 1987-05-06 1988-11-11 Mitsubishi Heavy Ind Ltd Manufacture of alpha-type gypsum hemihydrate
US5639298A (en) * 1995-11-27 1997-06-17 Air Products And Chemicals, Inc. Modified gypsum compositions
CN104262850A (en) * 2014-09-30 2015-01-07 华中师范大学 Alpha-hemihydrate gypsum/polyvinyl chloride ordered composite material and preparation method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63274615A (en) * 1987-05-06 1988-11-11 Mitsubishi Heavy Ind Ltd Manufacture of alpha-type gypsum hemihydrate
US5639298A (en) * 1995-11-27 1997-06-17 Air Products And Chemicals, Inc. Modified gypsum compositions
CN104262850A (en) * 2014-09-30 2015-01-07 华中师范大学 Alpha-hemihydrate gypsum/polyvinyl chloride ordered composite material and preparation method thereof

Also Published As

Publication number Publication date
JPS6353142B2 (en) 1988-10-21

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