Hyperfine Grinding of Coal
| Autor: | G. R. Dyrkacz, C. A. A. Bloomquist |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
Bituminous coal
Range (particle radiation) Materials science business.industry General Chemical Engineering Metallurgy geology.rock_type technology industry and agriculture geology Energy Engineering and Power Technology chemistry.chemical_element complex mixtures respiratory tract diseases Grinding Fuel Technology chemistry Slurry Mill Coal business Carbon Ball mill |
| Zdroj: | Energy & Fuels. 8:680-689 |
| ISSN: | 1520-5029 0887-0624 |
| DOI: | 10.1021/ef00045a024 |
| Popis: | Coal was subjected to intensive grinding to produce submicrometer particles. This was done in two stages. Ultrafine coal produced by fluid energy mill grinding was further ground in a planetary ball mill or attritor mill. The grinding process was monitored by density gradient separation and surface area measurements. Conditions were established to produce coal in the 0.05-1 μm size range with 3 h of grinding. Several different slurry solvents were examined for grinding efficiency. Extensive accretion of coal particles to produce homogeneous particles was found to be a major problem. In several instances there appeared to be a low melting phase produced (∼65 °C) which cemented the fine particles together during vacuum drying |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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