ハードグローブ試験法における充填量の効果
昭和45年11月4日第7回石炭科学会議講演
1970 年 49 巻 12 号 p. 868-873
詳細
1970 年 49 巻 12 号 p. 868-873
In the present report, the experimental results are summarized as follows.
1. It is reported by a number of workers that there are some different sort of relationships between the ash content of coal and of its grindability (Hardgrove Grindability Index). Seeing that this complexity of the relationships can be attributed to the specific gravity of coal changing together with its ash content, the authors have attempted to investigate the effect of specific gravity of coal upon the grindability. As the result, the effect of specific gravity of coal upon its grindability is neglected reasonably.
2. In the standard method of test for grindability of coal by the Hardgrove Method, 50 grams of sample of coal shall be charged accurately. In accordance of our experimental results, change of weight (or volume) of charged sample has no influence upon the value of Hardgrove Index. Then, we shall not find important meaning in charging of sample of just 50 grams.
