发明名称 |
EFFICIENT WET STARCH PREPARATION SYSTEM FOR GYPSUM BOARD PRODUCTION |
摘要 |
The present invention provides a wet starch preparation system for gypsum wallboard comprising a loss-in-weight starch feeder, a venturi mixer, a vacuum pick-up unit for supplying the dry starch from the feeder at an adjustable rate to the venturi mixer, a first water pump for supplying water at an adjustable rate to the venturi mixer to form a starch pre-dispersion of from about 2% to about 10% by weight starch and a second water pump for supplying gauging water to the starch pre-dispersion, the system equipped with appropriate system controls. The present system provides more efficient use of starch such that the amount of pregelatinized starch is at least about 10% less than a system in which the starch is not pre-dispersed in water prior to the board mixer. The system can be used to make gypsum-containing products including gypsum wallboard having increased board strength and reduced board weight.
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申请公布号 |
CA2736224(A1) |
申请公布日期 |
2010.03.11 |
申请号 |
CA20092736224 |
申请日期 |
2009.08.28 |
申请人 |
UNITED STATES GYPSUM COMPANY |
发明人 |
YU, QIANG;SCHENCK, RON;DIGENNARO, SALVATORE;FOLSON, STEPHEN;HENRY, KEVIN;GUINED, TIM |
分类号 |
B28C7/04;B01F3/12;B28C1/02;C04B28/16;E04C2/26 |
主分类号 |
B28C7/04 |
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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