发明名称 |
PROCESS FOR MAKING MINERAL WOOL FIBERS AND FIBERS MADE ACCORDING TO SUCH PROCESS |
摘要 |
A process for making mineral wool fibers having high-temperature stability comprises: (a) preparing a mixture containing basalt and a quantity of uncalcined raw bauxite sufficient to provide the resulting fibers with an alumina content of at least 18 weight percent, preferably of from 19 to 23 weight percent; (b) heating the mixture to a temperature sufficient to form a substantially homogeneous melt, e.g., in a cupola furnace using coke in a quantity of from about 11 to 25 percent by weight of the mixture; and (c) forming the melt into fibers. The mixture may optionally contain a flux, e.g., limestone and/or dolomite, such as a flux providing a weight ratio of limestone plus dolomite to basalt of less than about 0.6, e.g., 0.1-0.4. The mixture may also contain slag in a weight ratio of slag:basalt of less than about 1.0, more preferably about 0.6. Preferably, at least about 90 % of the uncalcined raw bauxite is of a particle size capable of passing through a 150-mm mesh screen but incapable of passing through a 25-mm mesh screen, more preferably capable of passing through a 125-mm mesh screen but not a 50-mm mesh screen. Preferably, the bauxite has a bound-water content of 10-33 weight percent. The weight ratio of alumina to silica in the fibers is preferably greater than 0.35.
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申请公布号 |
WO9815503(A1) |
申请公布日期 |
1998.04.16 |
申请号 |
WO1997US17258 |
申请日期 |
1997.09.26 |
申请人 |
OWENS CORNING;OWENS-CORNING BUILDING PRODUCTS U.K. LTD. |
发明人 |
JACKSON, JAMES, ROGER;RAPP, CHARLES, F.;BAYBUTT, GEORGE, D.;PENNINGTON, HARRY |
分类号 |
C03C13/06;(IPC1-7):C03B37/01 |
主分类号 |
C03C13/06 |
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