TY - GEN
T1 - Recovery and utilization of bottom ash magnetics for coal cleaning medium
AU - Honaker, R. Q.
AU - Akram, Z.
AU - Groppo, J.
PY - 2009
Y1 - 2009
N2 - Dense medium processes are used to clean over 50% of the coal that is fed into preparation plant facilities worldwide. The dense medium is formed using ultrafine magnetite which is recovered after the cleaning step using drain-and-rinse screens and magnetic separators. Despite the high efficiency of the recovery system, magnetite losses of around 0.5 to 1.0 kg/ton are common. Considering the recent escalation of magnetite to around $300/ton, an alternative source of magnetic material from coal combustion bottom ash has been investigated. A relatively low cost recovery system has been developed. Dense-medium tests using the bottom ash magnetics revealed a high level of efficiency as indicated by probable error values around 0.03 over the range of medium densities investigated. The results from both the recovery and coal cleaning efforts will be discussed in detail.
AB - Dense medium processes are used to clean over 50% of the coal that is fed into preparation plant facilities worldwide. The dense medium is formed using ultrafine magnetite which is recovered after the cleaning step using drain-and-rinse screens and magnetic separators. Despite the high efficiency of the recovery system, magnetite losses of around 0.5 to 1.0 kg/ton are common. Considering the recent escalation of magnetite to around $300/ton, an alternative source of magnetic material from coal combustion bottom ash has been investigated. A relatively low cost recovery system has been developed. Dense-medium tests using the bottom ash magnetics revealed a high level of efficiency as indicated by probable error values around 0.03 over the range of medium densities investigated. The results from both the recovery and coal cleaning efforts will be discussed in detail.
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M3 - Conference contribution
AN - SCOPUS:70450221150
SN - 9781615671533
T3 - SME Annual Meeting and Exhibit and CMA's 111th National Western Mining Conference 2009
SP - 6
EP - 11
BT - SME Annual Meeting and Exhibit and CMA's 111th National Western Mining Conference 2009
T2 - SME Annual Meeting and Exhibit and CMA's 111th National Western Mining Conference 2009
Y2 - 22 February 2009 through 25 February 2009
ER -