高强度马丁砂MDC-109为高强度镁砂化学陶瓷结合的耐火材料,被称为万能补炉料。迄今,有关马丁砂MDC-109对工人的不良影响尚乏报道。1989年12月初,某厂炼钢车间两次使用马丁砂MDC-109(共3.5吨)补炉,在倒装加水搅拌过程中,工人不戴面罩操作,每工作1小时人员替换一 High-strength Martin Sand MDC-109 is a refractory material combined with high-strength magnesia chemical ceramics. It is called universal fill material. To date, the adverse effects on workers of Martin Sand MDC-109 have not been reported. In early December 1989, a factory steelmaking workshop used Martin Sand MDC-109 (a total of 3.5 tons) for two times to make up the furnace. During the process of pouring and adding water, the workers did not wear the mask operation and each hour of work replaced one