Surface magnetic enhancement for coal cleaning
The program consisted of a fundamental study to define the chemistry for the interactions between magnetic reagent and mineral and coal particles, a laboratory study to determine the applicability of this technology on coal cleaning, and a parameter study to evaluate the technical and economical feasibility of this technology for desulfurization and de-ashing under various processing schemes. Surface magnetic enhancement using magnetic reagent is a new technology developed at the Institute. This technology can be applied to separate pyrite and other minerals particles from coal with a magnetic separation after adsorbing magnetic reagent on the surface of pyrite and other minerals particles. Particles which have absorbed magnetic reagent are rendered magnetic. The adsorption can be controlled to yield selectivity. Thus, the separation of traditionally nonmagnetic materials with a magnetic separator can be achieved. Experiments have been performed to demonstrate the theoretical fundamentals and the applications of the technology. Adsorbability, adsorption mechanisms, and adsorption selectivity are included in the fundamental study. The effects of particle size, magnetic reagent dosage, solid contents, magnetic matrix, applied magnetic field strengths, retention times, and feed loading capacities are included in the application studies. Three coals, including Illinois No. 6, Lower Kittanning and Pocahontas seams, have been investigated. More than 90% pyritic sulfur and ash reductions have been achieved. Technical and economic feasibilities of this technology have been demonstrated in this study. Both are competitive to that of the froth flotation approach for coal cleaning.
- Research Organization:
- Michigan Technological Univ., Houghton, MI (United States). Inst. of Materials Processing
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC22-88PC88856
- OSTI ID:
- 6704470
- Report Number(s):
- DOE/PC/88856-T12; ON: DE93000892
- Country of Publication:
- United States
- Language:
- English
Similar Records
Surface magnetic enhancement for coal cleaning
Surface magnetic enhancement for coal cleaning. Quarterly technical progress report no. 9, February 1, 1990--April 30, 1990
Related Subjects
COAL PREPARATION
FEASIBILITY STUDIES
MAGNETIC MATERIALS
ADSORPTION
PYRITE
SORPTIVE PROPERTIES
COAL
DEASHING
DESULFURIZATION
PARAMETRIC ANALYSIS
PROGRESS REPORT
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
DOCUMENT TYPES
ENERGY SOURCES
FOSSIL FUELS
FUELS
MATERIALS
MINERALS
SORPTION
SULFIDE MINERALS
SURFACE PROPERTIES
010300* - Coal
Lignite
& Peat- Preparation- (1987-)