JPS54152692A - Continuous manufacture of gypsum needle-like crystal - Google Patents
Continuous manufacture of gypsum needle-like crystalInfo
- Publication number
- JPS54152692A JPS54152692A JP6147478A JP6147478A JPS54152692A JP S54152692 A JPS54152692 A JP S54152692A JP 6147478 A JP6147478 A JP 6147478A JP 6147478 A JP6147478 A JP 6147478A JP S54152692 A JPS54152692 A JP S54152692A
- Authority
- JP
- Japan
- Prior art keywords
- slurry
- gypsum
- crystals
- needle
- autoclave
- 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)
- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
PURPOSE:To manufacture gypsum needle-like crystals suitable for use as a composite material with thermoplastic resin at a high crystallization speed by blowing steam into an aq. slurry of gypsum particles to hold the slurry at above a specified temp. when charged into an autoclave with a pump. CONSTITUTION:When raw material gypsum is dispersed in water and the resulting aq. slurry is charged into an autoclave with a pump, steam is blown into the slurry to hold the slurry at above 115 deg.C. The slurry heated to above 115 deg.C is further heated in the autoclave if necessary to complete crystallization of alpha-type hemihydrate gypsum needle-like crystals. By this method the crystals are formed at a high crystallization speed, and hence the raw material gypsum and crystallizing alpha-type hemihydrate gypsum needle-like crystals are present in a mixed state for only a short time.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6147478A JPS54152692A (en) | 1978-05-22 | 1978-05-22 | Continuous manufacture of gypsum needle-like crystal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6147478A JPS54152692A (en) | 1978-05-22 | 1978-05-22 | Continuous manufacture of gypsum needle-like crystal |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54152692A true JPS54152692A (en) | 1979-12-01 |
JPS6146405B2 JPS6146405B2 (en) | 1986-10-14 |
Family
ID=13172084
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6147478A Granted JPS54152692A (en) | 1978-05-22 | 1978-05-22 | Continuous manufacture of gypsum needle-like crystal |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54152692A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56145116A (en) * | 1980-04-14 | 1981-11-11 | Idemitsu Kosan Co Ltd | Continuous preparation of light gypsum |
JP2010527876A (en) * | 2007-05-24 | 2010-08-19 | ゲレンツェバッハ−ベーエスハー ゲーエムベーハー | Process for producing .ALPHA.-calcium sulfate hemihydrate from calcium sulfate dihydrate. |
CN107117841A (en) * | 2017-05-02 | 2017-09-01 | 武汉理工大学 | A kind of activated fibre matter sulphate aluminium cement mortar reinforcing agent and preparation method thereof |
-
1978
- 1978-05-22 JP JP6147478A patent/JPS54152692A/en active Granted
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56145116A (en) * | 1980-04-14 | 1981-11-11 | Idemitsu Kosan Co Ltd | Continuous preparation of light gypsum |
JPS6320785B2 (en) * | 1980-04-14 | 1988-04-30 | Idemitsu Kosan Co | |
JP2010527876A (en) * | 2007-05-24 | 2010-08-19 | ゲレンツェバッハ−ベーエスハー ゲーエムベーハー | Process for producing .ALPHA.-calcium sulfate hemihydrate from calcium sulfate dihydrate. |
CN107117841A (en) * | 2017-05-02 | 2017-09-01 | 武汉理工大学 | A kind of activated fibre matter sulphate aluminium cement mortar reinforcing agent and preparation method thereof |
CN107117841B (en) * | 2017-05-02 | 2020-01-14 | 武汉理工大学 | Active cellulosic sulphoaluminate cement mortar reinforcing agent and preparation method thereof |
Also Published As
Publication number | Publication date |
---|---|
JPS6146405B2 (en) | 1986-10-14 |
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