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过去长沙有色加工厂生产的发电设备冷凝器用的铝黄铜管,由于工艺和设备条件限制,一般最大长度只有7米,少量生产7.3米长管。近年来,随着我国工业的发展,20万千瓦以上的大发电机组不断增加,所需长度8.5米的冷凝器管急缺。这种长管制作困难,易产生环痕、偏心、脱锌及性能不均等缺陷问题,退火还需要长炉膛退火炉。
In the past, non-ferrous metal processing plants in Changsha produced power plant condenser aluminum brass tubes, due to process and equipment constraints, the general maximum length of only 7 meters, a small amount of 7.3-meter long tube. In recent years, with the development of our country’s industry, large generating units of more than 200,000 kilowatts have been continuously increasing, and the required length of 8.5 meters of condenser tubes is in short supply. This long tube production difficulties, prone to ring marks, eccentricity, dezincification and performance problems such as non-uniform defects, annealing also need long furnace annealing furnace.