关键词: 钢包;隔热浇注料;莫来石;造孔剂

Abstract: In order to ensure the changes of molten steel temperature meet the demands of refining and continuous casting process , heat insulation thermal insulation materials were used to improve the insulation performance of the ladle .Using sintered mullite as aggregate , the effects of four kinds of pore forming agent ( magnesite powder , cenosphere , foam-polystyrene and plastic particles ) on the apparent porosity and strength were studied .The result shows that , adding magnesite powder as the pore forming agen, the apparent porosity of the samples is low , and the strength of the samples increases significantly when the pore forming agent added over 10%.With polystyrene beads and plastic granules as the pore forming agent , the apparent porosity of the samples increases with the increase of the amount of introduction .Composite adding 10%magnesite powder and 5%plastic particles makes the porosity up to 29.34%, the compressive strength up to 42 MPa and the bulk density down to 1.98 g· cm -3 .So it is the most suitable for developing mullite ladle heat insulation casting materials .

Key words: ladle;heat insulation casting material;mullite;pore forming agent