Abstract
Considering the serious shortage of water in China, there are two main problems of water utilization in steel plants. One is to save fresh water consumption, and the other is to reduce the waste water discharge. In 2012, the fresh water consumption and the waste water discharge of Chinese key steel plants accounted for 1.2% and 2.4% of the industry sectors. The discharge standard of water pollutants for steel plants in China is more and more rigorous. Since the new century, the specific fresh water consumption per ton steel of Chinese key steel plants was reduced from 25.24t in 2000 to 3.25t in 2015 by technical progress, such as coke dry quenching (CDQ), dry de-dusting of blast furnace gas (BFG) and converter gas (BOFG), etc. Technologies for saving fresh water and reducing waste water discharge will be developed in the future. Seawater desalination technique will be developed in the eco-industrial port zones of steel plants to reduce the ground water extraction. Civil sewage will be processed and used in the suburban steel plants. These two demonstration projects have been built in Shougang Jingtang steel plant and Tangshan steel plant respectively.
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