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我厂由于缺少锰矿及含锰较高的铁矿,因此所产转炉炼钢生铁含锰量极低,一般仅在0.06%左右,而进入熔铁炉的生铁配料成分平均 Si 的含量在1.0—1.2%,Mn 的含量在0.06—0.08%,P 的含量在0.045—0.055%,S 的含量在0.03—0.04%。我们深恐锰低影响质量,因此在1956年以前,一直保持着增加装入转炉铁水中的含锰量的加锰操作(在1955年中每炉最高锰铁加入量含锰在69%左右),每炉最低锰铁加入量为8kg,平均加入量为13kg,耗用着大量锰铁资源。自1955年增产节约运动开展以后,我们为了降低成本,就开始在实际操作中由原锰0.4%降低到0.3%。
Due to the lack of manganese ore and high manganese ore, the pig iron produced by our converter is extremely low in manganese content, generally only about 0.06%, while the average Si content of pig iron ingredients entering the melting furnace is 1.0- 1.2%, Mn content 0.06-0.08%, P content 0.045-0.055%, S content 0.03-0.04%. We are afraid that manganese will have a low impact on quality. Therefore, by 1956, the manganese addition operation to increase the amount of manganese contained in the converter’s molten iron had been maintained (with a maximum of 69% manganese content per furnace in 1955) , The minimum amount of ferromanganese for each furnace is 8kg, the average amount added is 13kg, consuming a large amount of ferromanganese resources. Since 1955, the campaign to increase production efficiency has been implemented, we have begun to reduce the cost from 0.4% manganese to 0.3% in actual operation in order to reduce costs.