为避免金属制件在淬火后淬火介质随废水直接排放造成硝盐的浪费及环境污染,利用温差结晶法对淬火介质进行结晶回收,采用三级水洗的方法对淬火后的工件进行清洗,并利用旋风除尘装置对淬火时的介质浮粉进行回收。结果表明,利用该技术可以最大限度地实现节水和淬火剂溶质的循环利用,使整个生产过程做到不排放废水、溶质得到90%以上回收,水的用量也减少到原来的近1/20。 In order to avoid the quenching of the metal parts after the quenching medium is directly discharged with the waste water resulting in the waste of the nitrate salt and the environment pollution, the crystallization of the quenching medium is recrystallized by the temperature difference crystallization method, the quenched workpiece is cleaned by the tertiary water washing method, Cyclone dust removal device for quenching the media floating powder recovery. The results show that the technology can be used to maximize the water and quencher solute recycling, so that the entire production process does not discharge wastewater, solute over 90% recovery, the amount of water is also reduced to the original nearly 1/20 .