Process to Reduce Ash in Flotation of Hard-to-Float Fine Coal

Abstract:

The most proportion of mineral impurities in this coal sample is Kaolin, which is very argilliferous and harmful for fine coal flotation. In this paper, the authors use recleaning process and add depressant inslurryto reduce the concentrate ash. The results show that the most appropriate depressant is sodium haxametaphosphate and the best flotation conditions are 80g/L feed concentration, 0.80l/t Kerosene dosage, 0.06l/t 2-octyl alcohol dosage, approximately 800g/t sodium haxametaphosphate dosage, and 4 minutes depressant action time. Consequently, the concentrate ash content decreases 5% than batch-floatation test.

• Periodical: Applied Mechanics and Materials (Volume 508)
• Pages: 133-136
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.508.133
• Online since: January 2014
• Authors: Ji Hui Li*, Li Qiang Ma, Gong Cheng, Xiao Hui Liu, Zhong Ling Zhang, Yue Xian Yu
• Keywords: Ash Reduction, Depressant, Fine Coal Slime, Flotation

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DOI: 10.1016/s0301-7516(96)00027-0

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