石墨加工过程的清洁生产工艺研究

研究了石墨加工过程中烧碱的回收利用。在由中碳石墨加工成高碳石墨的过程中，要消耗大量的烧碱，形成大量碱性废水。我们利用石灰苛化法回收工业原料烧碱，取得良好效果，烧碱的回收率占加入量的65.4％；回收后的烧碱重新回用于石墨的加工生产，不仅有效节约了资源，且能够使出水符合国家排放标准，实现了石墨加工过程的清洁生产。

Research on cleaner production technology in graphite processing

The caustic soda recycle and utilization were investigated in the present work.During the process of the preparation of high-carbon graphite from medium-carbon one,large amount of caustic soda were consumed.Consequently,alkaline wastewater was produced.The conventional lime causticizing approach was applied to recover the industrial material,i.e.,the caustic soda.The caustic soda recycling rate is up to 65.4%.Moreover,they could be reused to the graphite processing.Hence,the resources are recycled effectively by using this method.Also,the outlet water pH can meet the national emission standard.Most important is that it is possible to realize cleaner production in graphite processing.