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Refractory materials e.g. for lining steel making equipment - made by mixing a granular refractory prod. with an aq. hard bitumen emulsion and drying
Refractory materials e.g. for lining steel making equipment - made by mixing a granular refractory prod. with an aq. hard bitumen emulsion and drying
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机译:耐火材料用于衬里炼钢设备-通过混合粒状耐火材料制成。与水硬沥青乳液和干燥
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摘要
Refractory prods. are made by mixing a granular refractory component with a binder comprising an aq. emulsion of a hard bitumen, and drying the mixt. to a moisture content of less than 0.3wt.% before further processing. Pref. the temp. of the mixt. during drying is lower than the ring and ball softening point of the binder. Pref. after the drying the mixt. contains 4-12%, esp. 5wt.% binder and 0-7%, esp. 2wt.% graphite. The granular refractory starting material is e.g. silica, chamotte, sillimanite, andalusite, mullite, bauxite, corundum, magnesite, magnesite-chromium oxide, silicon carbide, carbon or graphite. The prods. are made at moderate temps., which avoids the harmful evolution of vapours caused by using pitch tar binders, and give materials which can be formed under heat and pressure into refractory prods. for lining metallurgical furnaces, steel casting equipment, etc. The prods. have good mechanical properties and good high temp.
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