据资料〔1〕介绍,日本利用喷吹法回收中锰渣中的锰,可使终渣含锰降至5％左右,且得到含碳较低的锰铁,效益显著。上海、吉林等厂家利用摇包法处理中锰渣,锰回收率也较高,终渣含锰8％左右。我厂中锰渣含锰高达19.81％(1983年6个样的平均值),锰回收率只60％,锰矿中约有40％的锰损失于渣中。为了降低中锰渣的含锰量,1986年3—12月我们开展了喷吹硅铁、萤石粉降锰的研究工作,收到了较好的效果。一、试验方法试验用原料见表1。试验是在功率100千瓦、频率1000赫的中频感应炉中进行。在φ250 According to the information [1] Introduction, Japan by injection recovery of manganese in manganese slag, the final slag can be reduced to about 5% manganese, and get a lower carbon content of ferromanganese, significant benefit. Shanghai, Jilin and other manufacturers use the shake bag method in the treatment of manganese residue, manganese recovery is also higher, the final residue of about 8% manganese. Manganese residue in our plant contains up to 19.81% of Mn (average of 6 samples in 1983), the recovery rate of manganese is only 60%, and about 40% of manganese in manganese ore is lost in the slag. In order to reduce the manganese content of manganese residue, from March to December 1986, we carried out the research work of blowing ferrosilicon and fluorite powder into manganese, and received good results. First, the test method Test raw materials in Table 1. The test was carried out in a medium frequency induction furnace with a power of 100 kW and a frequency of 1000 Hz. At φ250