我厂铸工车间使用的是2.5～3吨/时的冲天炉,每批铁料250公斤,外加焦炭和熔剂,一批料共分两次加入,平均三分钟左右就要开动加料机一次。因此,负责加料并记数的同志工作较繁忙,往往有在加料后忘记记数的情况,这样不但统计不正确,在同一炉次熔炼几种不同的铸铁时,就要打乱熔炼计划;另一方面,由于炉中加料的情况只有加料工知道,炉前工要掌握炉子的下料情况,就必须经常和加料工联系,也比较麻烦。针对这种情况,我们 I plant casting workshop is 2.5 ~ 3 tons / hour cupola, each batch of 250 kilograms of iron, plus coke and flux, a total of two batches of material added in an average of about three minutes to start the feeder. Therefore, the comrades in charge of filling and counting work are more busy, often having to forget the count after the charging. In this way, not only the statistics are not correct, the melting plan must be disrupted when several different cast irons are melted in the same furnace. On the one hand, since the feeding of the furnace is only known to the feedman, the foreman must keep in touch with the feeding worker and the troublesome if he has to know the feeding situation of the furnace. In view of this situation, we