废旧橡胶低温粉碎技术研究进展

废旧橡胶回收利用技术是促进我国橡胶行业发展和提高环境治理水平的优先发展方向，深冷粉碎制精细胶粉最具发展前景。本文介绍了液氮制冷、空气膨胀制冷、氨-乙烷复叠式制冷、高压天然气膨胀制冷以及利用液化天然气冷能制冷的几种橡胶低温粉碎法方法；采用这些方法能耗较大、产品性质难以控制，且除液氮法外，其它方法还存在粉尘污染问题。针对上述问题，提出了以液化天然气冷能为冷源的废旧橡胶液相冷媒深冷粉碎技术，该技术具有能耗低、产品性质易于控制等优点，同时又能大幅降低胶粉生产过程中的粉尘污染。

Progress in waste rubber cryogenic comminution technology

Waste rubber recycle is a preferential development direction to promote the development of rubber industry and to improve environment management level. Producing fine powder by cryogenic comminution is the most promising method for rubber recycle. The present paper summarizes the progress in rubber cryogenic comminution, including refrigeration techniques with liquid nitrogen, air expansion, ammonia-ethane, natural gas under high pressure expansion and liquefied natural gas cryogenic energy. Most of these techniques are encountered with many difficulties such as high energy consumption, product quality control as well as dust pollution etc. Hence, the present paper proposes a waste rubber cryogenic comminution technique using liquid refrigerant and liquefied natural gas as the cold source, which may have some merits such as lower energy consumption, better product quality control and dramatically reduced dust pollution and so on.