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铝及铝合金在熔炼过程中,往往吸气很多,其中吸氢尤为严重。再加上原材料中所含的气体,将会在铸件中形成气孔、针孔、使铸件报废。为了彻底去除铝液中的气体,必须进行精炼处理。我厂一直采用六氯乙烷为精炼剂,但是。在把C_2Cl_6压制成块精炼时,产生强烈刺激性的有毒气体,污染环境,有损健康,腐蚀设备,危害绿化。现在采用无毒精炼剂(江苏沙洲金属熔剂厂提供)开展工艺试验,取得了良好的效果。
Aluminum and aluminum in the melting process, often get a lot of suction, in which hydrogen absorption is particularly serious. Together with the gases contained in the raw materials, pores and pinholes are formed in the castings, discarding the castings. In order to completely remove the liquid aluminum gas, must be refined. I plant has been using hexachloroethane as refining agent, however. When C_2Cl_6 is pressed into blocks, it produces strong and irritating poisonous gas, polluting the environment, impairing health, corroding equipment and endangering greening. Now using non-toxic refining agent (Jiangsu Shazhou metal flux plant) to carry out technological tests, and achieved good results.