00/02318 Improvement of briqueting and pelletizing properties of hard brown coals
- Publisher
- Elsevier Science
- Year
- 2000
- Weight
- 428 KB
- Volume
- 41
- Category
- Article
- ISSN
- 0140-6701
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✦ Synopsis
(In Japanese)
Briquetting machines used in the manufacture of briquettes and stoves are discussed. The process includes compression of coal powder. A feeder feeds the powdered coal between rotary rolls, an adjustable plate can be altered by the bite amount of powder between the rolls along the axial direction of the roll.
00/02309
Calculation of combustion zone height in coke-fired cupola (coke pieces of various shape and dimensions) Longa, W. :Mercr//. Frjun&y Eng., 1998, 24, (3). 159~~168 Presented is a formula, suitable for calculating the height of a combustion zone in a coke-fired cupola, when the coke charges are composed of fractions, varying in shape and dimensions. There is a random system for the burning of the different diameter coke pieces and bulk density is used to define the density of their arrangement.
00/02310
Changes in reactive surface area and porosity during char oxidation Aarna, I. and Suuberg, E. M. Symp. lInr.1 Cornhust.. /Proc./.
1998, 2, 2933-2939. There has been a fundamental scientific interest in the intrinsic reactivity of coal chars for many years. Both nitrogen BET and COz surface areas are in common use for characterizing the surface areas available for reaction of chars under intrinsic reaction-rate control and zone II conditions. The best choice of adsorptive is not yet clear. This study compares nitrogen, argon, and carbon dioxide to explore the porosity of a sub-bituminous coal char burned off to differing extents in oxygen, nitric oxide, and carbon dioxide.