JPS6476911A - Production of alpha-gypsum hemihydrate - Google Patents
Production of alpha-gypsum hemihydrateInfo
- Publication number
- JPS6476911A JPS6476911A JP23243587A JP23243587A JPS6476911A JP S6476911 A JPS6476911 A JP S6476911A JP 23243587 A JP23243587 A JP 23243587A JP 23243587 A JP23243587 A JP 23243587A JP S6476911 A JPS6476911 A JP S6476911A
- Authority
- JP
- Japan
- Prior art keywords
- gypsum
- slurry
- alpha
- hemihydrate
- solid
- 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
Links
Landscapes
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
PURPOSE:To easily produce alpha-gypsum hemihydrate in high efficiency, by producing a slurry of alpha-gypsum hemihydrate in a pressurized hydrothermal treatment tank, cooling the slurry to a prescribed temperature by the heat-exchange with a gypsum dihydrate slurry used as a raw material and separating into solid and liquid under atmospheric pressure. CONSTITUTION:A slurry 5 of gypsum dihydrate is produced by supplying gypsum dihydrate 1, sodium citrate 2 and water 3 to a gypsum dihydrate slurry preparation tank 4. The gypsum dihydrate slurry 5 is introduced through a heat- exchanger 6 into a pressurized hydrothermal treatment tank 8 and is subjected to pressurized hydrothermal treatment to convert the gypsum dihydrate into alpha-gypsum hemihydrate. The produced slurry 9 of alpha-gypsum hemihydrate is transferred to the heat-exchanger 6, cooled by the heat-exchange with the gypsum dihydrate slurry 5 and further cooled to 90-100 deg.C with a cooler 11. The cooled slurry is introduced into a solid-liquid separation tank 13 and separated into solid and liquid under atmospheric pressure. The solid alpha-gypsum hemihydrate 14 is dried with a drier 15 and crushed with a crusher 17 to obtain the alpha-gypsum hemihydrate 18 as the product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23243587A JPH0686296B2 (en) | 1987-09-18 | 1987-09-18 | α-type hemihydrate gypsum manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23243587A JPH0686296B2 (en) | 1987-09-18 | 1987-09-18 | α-type hemihydrate gypsum manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6476911A true JPS6476911A (en) | 1989-03-23 |
| JPH0686296B2 JPH0686296B2 (en) | 1994-11-02 |
Family
ID=16939217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23243587A Expired - Fee Related JPH0686296B2 (en) | 1987-09-18 | 1987-09-18 | α-type hemihydrate gypsum manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0686296B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010504271A (en) * | 2006-09-20 | 2010-02-12 | ユナイテッド・ステイツ・ジプサム・カンパニー | Process for producing ultra low consistency α- and β-blend cosmetic plaster |
| GB2497574B (en) * | 2011-12-15 | 2019-10-02 | Saint Gobain Placo Sas | A method of forming a gypsum based product |
-
1987
- 1987-09-18 JP JP23243587A patent/JPH0686296B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010504271A (en) * | 2006-09-20 | 2010-02-12 | ユナイテッド・ステイツ・ジプサム・カンパニー | Process for producing ultra low consistency α- and β-blend cosmetic plaster |
| GB2497574B (en) * | 2011-12-15 | 2019-10-02 | Saint Gobain Placo Sas | A method of forming a gypsum based product |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0686296B2 (en) | 1994-11-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |