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一取样和制样取有代表性的焦炭试样数块(一般每吨取两块),每块用铁锤敲碎,选取中心部位并有代表性的焦炭1～2粒(每粒重约3～5克)。集中选取的试样,粉碎过60目筛(粗屑应反复加工至全部过筛)。混匀,用四分法取10～15克试样于称物瓶中备用。二操作方法取经过850℃灼烧至恒重的8.8cm瓷舟一只,迅速称取焦炭试样1g,放于瓷舟中。1 水份的测定:把瓷舟推入管状高温炉中心,升温至100～110℃,预热15分钟,以每分钟约300ml的速度通氧30分钟,取出,放于干燥器中冷却,称重,失重为水份。2 挥发物的测定:升温至820～850℃,先用一
A sampling and sample preparation Take a representative of the coke sample pieces (usually two tons per ton), each piece with a hammer smash, select the center and representative coke 1 to 2 (each weight of about 3 to 5 grams). Concentrate the selected sample, crushed by 60 mesh sieve (coarse crumbs should be processed repeatedly until all sieved). Mix well and take 10 ~ 15g sample in quartering to weigh bottle. Two methods of operation After 850 ℃ burning to a constant weight 8.8cm porcelain boat, quickly weighed coke sample 1g, placed in a porcelain boat. 1 Determination of water: The porcelain boat pushed into the center of the tubular high temperature furnace, warmed to 100 ~ 110 ℃, preheated for 15 minutes to about 300ml per minute rate of oxygen for 30 minutes, remove and put in a desiccator to cool, said Weight, weightlessness for the water. 2 Determination of volatiles: heating to 820 ~ 850 ℃, first with one