1. Settling characteristics analysis of coal slime water based on original hardness.
- Author
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ZHANG Zhi-jun and LIU Jiong-tian
- Abstract
A new conception of original hardness was proposed to evaluate the settling characteristics of coal slime water. The mineralogical and water quality analysis of four coal preparation plants shows the original hardness is determined by the basic hardness of washing water and the minerals composition of coal ores, and the mathematical iteration model of original hardness was developed, and the model has high reliability which is verified by laboratory simulation tests of coal slime water cycle. The settling tests indicate that the higher water hardness, the higher settling rate, and the clearer supernatant when the water hardness under 5 mmol/L. Some examples of coal preparation plants show that coal slime water is hard to settle at low original hardness, and it is easy to clarify at high original hardness. As a result, the original hardness is key influence factor of settling characteristics of coal slime water. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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