过去一般认为小铁率高无关大局,只要外表内在质量好就可以了。由于生产的需要,我们质管小组以1983年1月至4月的小铁率为6.52%算了一笔帐,如果将小铁率降到3%,则1984年同期内可增铁1252吨,节焦726吨,增加利润33.8万元。为了找出小铁率高的原因,质管小组于1983年8月份进行现场调查。查明造成小铁率高的主要因素有:一是回模铁多,致使铁 In the past generally believed that the high iron rate has nothing to do with the overall situation, as long as the appearance of good quality on it. Due to production needs, our quality control team calculated the small iron rate of 6.52% from January to April 1983 and reduced the iron rate to 3%. In 1984, it added 1252 tons of iron , Section coke 726 tons, increase profits 338,000 yuan. In order to find the reason for the high rate of small irons, the Quality Management Team conducted a site investigation in August 1983. Identify the main factors resulting in high rates of small iron are: First, back to more mold iron, resulting in iron