小料钟是高炉炉顶主要设备之一,它和大料钟起着同等的作用。由于它的质量优劣和寿命长短直接影响着高炉的利用系数和焦比,因此,国内外对提高小料钟的性能和延长其使用寿命,已引起科研和生产部门的重视。近二十年来,先后研究以高锰铸钢和高铬铸铁取代35号碳素铸钢制 Small bell is one of the main equipment blast furnace roof, which plays the same role with the large bell. Because of its quality and life expectancy directly affect the blast furnace utilization factor and coke ratio, therefore, at home and abroad to improve the performance of small bell and to extend its service life, has attracted research and production departments attention. Nearly two decades, has studied the high manganese steel and high chromium cast iron instead of 35 cast steel