Efficiency promotion in separation of ultra-fine coal

Conference · Thu Dec 31 04:00:00 EST 1998

OSTI ID:349262

Xiaoheng, Fu; Zuna, Wang ^[1]; Shuanyou, Su ^[2]

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1. China Univ. of Mining and Technology, Beijing (China)
2. Yinchuan Active Cabon Plant (China)

Hydrophobic flocculation process has been successfully applied in the separation of ultra-fine coal, especially in the recovery of low ash concentrate from middling of coking coal or ultra-clean coal from conventional concentrate. In this paper the mechanism of promotion effect of coarse particle addition in the process of hydrophobic flocculation separation of ultra-fine coal has been studied. Experiments show that with the addition of coarse coal particle up to 15%, the ash content of concentrate decreased from 11.32% to 9.80%, the index of separation perfection increased from 72.95% to 75.95%, pulp conditioning time reduced from 10 min to 5 min. It shows that the addition of coarse particles in the proper amount accelerates the floc formation, reduces energy consumption in the mixing step and lowers ash content in concentration.

• OSTI ID: 349262
• Report Number(s): CONF-980985--; ISBN 1-890977-15-2
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
ADDITIVES
ASH CONTENT
COAL
COAL FINES
COAL PREPARATION
DEASHING
ENERGY CONSUMPTION
FLOCCULATION
PARTICLE SIZE