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 DEG C; b) feeding the hot plaster in a moistening device having walls heated to at least 100 DEG 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 DEG C; e) feeding the moistened blend into a curing device; f) maintaining an atmosphere in the curing device above 75 DEG 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 DEG C. <??>The invention finally provides specific uses for plasters obtainable by the process of the invention. <IMAGE>
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申请公布号 |
EP1547984(A1) |
申请公布日期 |
2005.06.29 |
申请号 |
EP20030293240 |
申请日期 |
2003.12.19 |
申请人 |
LAFARGE PLATRES |
发明人 |
BOLD, JOEERG |
分类号 |
B01F9/00;B01F9/02;B01F9/06;B01F15/06;C04B11/028;C04B11/036;F26B11/02;F26B11/04;(IPC1-7):C04B11/036 |
主分类号 |
B01F9/00 |
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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