According to the balance point of profit and loss, better economic benefits can be got with the ascertain of Critical-grade calculated generally.
依照盈亏平衡点通过综合计算，对矿体的临界品位进行确定，获得较好的经济效益和各项指标。
Comprehensive utilization status of acid from washing water in chlorobenzene production was introduced. Zero discharging were realized, and got better economic and social benefits by innovation.
介绍了氯化苯生产过程中水洗酸废水综合利用的情况，通过工艺改造，实现了废酸的零排放，且具有显著的经济和社会效益。
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