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我厂生产ZL201合金,生产时须先将难熔金属锰配制成Al-Mn中间合金。 以往配制中间合金,成份不易掌握,波动很大,金属锰损耗严重。按配方需要,锰含量占合金重量的10％,但熔炼结果仅达到7～8％。有20％的锰由于工艺和熔炼原因被氧化,而被当作废渣清除,造成了原料的浪费,再者熔炼时间长。我厂采用燃油坩锅炉,熔化一炉70公斤中间合金竟耗时150分钟左右,相应增加了工人的劳动强度。 针对问题,我们经过观察分析,找到了主要原因,即熔炼时,往往先将铝液过热到850～900℃,这时,加入锰而导致部分锰表面被氧化,生成
I plant ZL201 alloy production, the production must first refractory metal manganese formulated as Al-Mn master alloy. In the past preparation of the master alloy, composition is not easy to grasp, volatile, serious loss of manganese metal. According to the formula, the manganese content accounts for 10% of the weight of the alloy, but the melting result only reaches 7 ~ 8%. 20% of the manganese is oxidized due to process and melting reasons and is treated as a waste residue, resulting in a waste of raw materials and a long melting time. I plant the fuel crucible boiler, melting a kiln 70 kilograms of intermediate alloy actually consumes about 150 minutes, a corresponding increase in the labor intensity of workers. For the problem, we observed and analyzed to find the main reason, that is, when melting, often the first aluminum liquid overheating to 850 ~ 900 ℃, then add manganese and lead to part of the manganese surface is oxidized to generate