Zhengzhou high tech Zone, China[email protected] 7*24 For you
50 g of air dried coal featuring a grain size in the range between 0.6 and 1.18160mm are filled into the sample mill and a weight is put on the mills grinding stone. after 60 rounds the grinded coal is put on a sampling sieve. factor d equals the fraction of the coal passing through the sieve of 74 956m corresponding to 200 mesh. hgi is calculated from d as.
If you want to learn about our products , please call or write mail consultation.