METHOD AND DEVICE FOR REMOVING IMPURITY IN MOLTEN METAL,申请号JP19820155489-传众专利搜索

METHOD AND DEVICE FOR REMOVING IMPURITY IN MOLTEN METAL

申请公布号：JPS5945065(A)

申请号：JP19820155489

申请日期：1982.09.07

申请公布日期：1984.03.13

申请人：

ISHIKAWAJIMA HARIMA JUKOGYO KK

发明人：KITAMURO KEIZOU;MATSUDA KENJI

分类号：B22D11/10;B22D11/11;B22D11/112;B22D11/113;B22D11/116;B22D11/117;B22D11/118

主分类号：B22D11/10

摘要：PURPOSE:To remove continuously the volatile impurity elements or gas in molten metal with simple constitution and low cost by dropping molten metal from a gate which dams up the molten metal flowing in a flow passage in the reduced pressure state under heating thereby increasing the surface area thereof. CONSTITUTION:The inside of a pool 2 provided in the mid-way of a flow passage 1 for molten metal is partitioned to two parts with a gate 3 in the direction orthogonal with a flow passage 1. A vacuum vessel 4 lined with a refractory material 9 is further inserted therein across the gate 3 to partition the two partitioned pools 2 further to two parts. When the inside of the vessel 4 is evacuated to a negative pressure through a vacuum line 10 in this state, the liquid level in the inside tank 6 of the vacuum vessel on the inlet side of the pool rises and the molten metal flows beyond the gate 3 and falls into the inside tank 7 of the vacuum vessel on the outlet side of the pool. A large surface area is thus obtd. and the evaporation of impurities is accelerated. It is possible to increase the evaporation rate of impurities by blowing an inert gas, etc. through a blow-out port 12 provided in the tank bottom or heating the inside of the pool with a heating electrode 11.