Performance evaluation of micronized-magnetite cycloning at high relative densities of separation

Technical Report · Mon Jun 01 04:00:00 EDT 1992

OSTI ID:10167388

Klima, M S; Killmeyer, R P

In 1991, eight laboratory-scale micronized-magnetite ({minus}10 {mu}m) cyclone tests were carried out at the US Department of Energy`s (DOE) Pittsburgh Energy Technology Center (PETC) to investigate the performance of this process in cleaning 600 {times} 38-{mu}m coal. Previous testing was done in the same 76-mm-diameter cyclone at a low relative density of the medium (1.30), whereas these tests were all conducted at a relative density of the medium of 1.50. The effects of inlet pressure, magnetite particle size, medium-to-coal ratio, and remanent magnetization of the dense-medium solids on cyclone separation efficiency were studied. The performance was analyzed in terms of both distribution curves and ash and pyritic sulfur values. The results demonstrated that micronized-magnetite cycloning can still achieve good separations down to as fine as 38 {mu}m with correspondingly good reductions in both ash and pyritic sulfur content even at the higher relative density. This report provides the detailed cyclone data for this series of follow-up tests.

• Research Organization: USDOE Pittsburgh Energy Technology Center, PA (United States). Coal Preparation Div.
• Sponsoring Organization: USDOE, Washington, DC (United States)
• OSTI ID: 10167388
• Report Number(s): DOE/PETC/TR--92/11; ON: DE92019276; NC: NONE
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010300
ASHES
CENTRIFUGATION
COAL PREPARATION
MAGNETITE
PARTICLE SIZE
PREPARATION
PYRITE
REMOVAL
SEPARATION PROCESSES