| 摘要 |
PURPOSE:To reduce considerably the cost of starting materials and the cost of energy and to obtain a very inexpensive glass fiber by adding a Ca source and a silica source to sewage sludge-base waste to regulate the composition, melting the waste by heating, and spinning the resulting slag before the slag solidifies by cooling. CONSTITUTION:A cake formed by drying sewage sludge or ash produced by incinerating the sludge is optionally mixed with other waste such as ash produced by incinerating municipal trash. The Ca source and the silica source are added to the waste to regulate the composition, and the waste is melted by heating in the furnace of a proper type to form molten slag having about 900-1300 deg.C softening point. Before the molten slag solidifies by cooling, it is spun at about 900-1300 deg.C to obtain a glass fiber having 0.6-1.1 ratio of CaO/SiO2. This glass fiber has the resistance against >=1000 deg.C high temp. and has considerably improved heat resistance as compared with a conventional glass fiber having <= about 500 deg.C softening temp.
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