本实用新型(专利号:ZL91229720.4)为一种防偏心定位注管砖,属于钢水浇注用耐火砖。我国1993年钢产量已达8800万吨,其中模铸比高达67％;1999年钢产量已达1.22亿吨,其中模铸钢仍有3000多万吨。且这些模铸钢中有相当大的部 The utility model (patent number: ZL91229720.4) is an anti-eccentric positioning injection brick, belonging to the refractory brick for molten steel pouring. In 1993, China’s steel production reached 88 million tons, of which the molding ratio was as high as 67%. In 1999, the steel output reached 122 million tons, of which more than 30 million tons of die-cast steel still existed. And there is a considerable portion of these die cast steels