73.風化炭の特性と中国におけるその利用研究

抄録

When a coal bed is exposed to (or located near) the earth surface, it is easily affected by variation of physical and chemical conditions, giving weathered coal One typical characteristics of the weathered coal is their extremely high content of the so-called regenerated humic acids, which is alkali soluble. Studies on humic acids and the weathered coal focusing on their application have been carried out extensively in China since the beginning of the 1980's. In this paper, factors that governing the properties and the formation behavior of the weathered coal were investigated Conditions that affording for higher content of humic acids in the weathered coal were also surveyed.