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云锡公司第一冶炼厂粗锡精炼除铅所用结晶放液法较氯化法具有效率高、不消耗化学试剂等优点,但操作程序繁杂、劳动强度大且很不安全。在无产阶级文化大革命中,依靠广大工人,组织内外“三结合”小组,试验成功了煤加热连续结晶除铅机,并改进为电热机械连续结晶。生产实践表明,其温度容易控制准确,对含铅15％以上粗锡、通过一次连续结晶可生产各号产品锡;热利用率高,设备使用寿命长,
The method of crystallizing and draining the lead used in the first smelter of Yunxi Company for refining lead is more efficient and does not consume chemical reagents than the chlorination method. However, the operating procedures are complicated, laborious and unsafe. In the Great Proletarian Cultural Revolution, we relied on a large number of workers to organize the “triple combination” of internal and external groups to test the success of the coal-heating continuous crystallization lead-removing machine and to improve the continuous crystallization of electrothermal machinery. Production practice shows that the temperature is easy to control accurate, more than 15% of crude tin, through a continuous crystallization can produce various products Tin; heat utilization, long service life,