A sample of the coal is partially demineralized by treatment with hydrochloric and hydrofluoric acids under such conditions that coal substance remains unaffected. The loss in mass of the coal due the acid treatment is recorded and the undissolved part of the mineral matter is determined by ashing the partiallay demineralized coal. The iron copntent of the ash is determined so that the pyrites present in the extracted coal can be calculated. In addition the amount of hydrochloric acid absorbed by the coal substance is determined.
Số hiệu tiêu chuẩn
ISO 602
Tên tiêu chuẩn
Coal; Determination of mineral matter
Ngày phát hành
1983-02-00
Trạng thái
Hết hiệu lực
Tiêu chuẩn tương đương
GB/T 7560 (2001), NEQ * NF M03-033 (1968-11-01), IDT * JIS M 8818 (1986-07-01), NEQ * SS 187156 (1984-04-01), IDT * GOST 29086 (1991), IDT * CSN ISO 602 (2010-09-01), IDT
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ISO 602