一、绪言炼铁高炉重要部件风渣口,目前全国年耗量为600吨左右,这种要求有高导热和致密度高接近纯铜的铸件,由于结构复杂在铸造时极易产生气孔缩裂等铸造缺陷而严重影响铸件质量。全国多数重点冶金企业风渣口的废品率高达20％以上,我们太钢多年来废品率平均在30％左右,产品质量低劣大量报废,不仅消耗了贵重金属,更重要的是直接影响到高炉生铁生产,多数冶金企业处于风渣口供应紧张状态, I. INTRODUCTION Iron ore blast furnace important component slag mouth, the current annual consumption of about 600 tons, this request has high thermal conductivity and high density close to the pure copper castings, due to the complexity of the structure in the casting is extremely prone to shrink pores Casting defects and other serious impact on the quality of castings. Most of the country’s key metallurgical slag mouth slag rate as high as 20% or more, we Taigang over the years the average rejection rate of about 30%, a lot of scrapped product quality inferior, not only consume precious metals, more importantly, a direct impact on blast furnace pig iron Production, the majority of metallurgical enterprises in the wind slag mouth supply tension,