发明名称 |
Method and apparatus for stabilizing plaster |
摘要 |
The invention provides a process for stabilizing plaster and an apparatus for implementing the moistening part of the process. The process comprises the following steps: a) providing a heated HH-plaster preferably at temperatures over 100° C.; b) feeding the hot plaster in a moistening device having walls heated to at least 100° C.; c) injecting water and/or steam into the moistening device in conditions that such not yet moistened surfaces of the plaster are exposed to the injected water and/or steam; d) maintaining an atmosphere in the moistening device at a level of the dew point in the range of 75 to 99° C.; e) feeding the moistened blend into a curing device; f) maintaining an atmosphere in the curing device above 75° C. for at least 3 minutes; g) feeding the moistened and cured blend into a drying device; and h) drying said moistened and cured blend. The invention also provides an apparatus for moistening beta-hemihydrate plaster comprising a rotating drum with lifting blades inside where all walls in contact with the product are externally heated at a temperature above 100° C.
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申请公布号 |
US7371278(B2) |
申请公布日期 |
2008.05.13 |
申请号 |
US20040014998 |
申请日期 |
2004.12.20 |
申请人 |
LAFARGE PLATRES |
发明人 |
BOLD JOERG |
分类号 |
C04B11/00;B01F9/00;B01F9/02;B01F9/06;B01F15/06;C04B11/028;C04B11/036;C04B11/26;F26B11/02;F26B11/04 |
主分类号 |
C04B11/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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