Coke ash content
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Why is the ash content of coal and coke used in China so high? Regarding the ash content of coke, for first-grade coke in China, it should not exceed 12.0; the highest values are seen in the two countries of the former Soviet Union and Japan, where it is 10.0. How is this controlled abroad? Country: China, United States, Former Soviet Union, Germany, France, Japan, United Kingdom. Grades: I, II, III. Coke ash content, %: ≯12.0, ≯13.5, ≯15.0. Ash content in coal used for firing, %: <10.5, 5.5–6.5, 8.0–8.5, 6.0–7.0, <7.0, 6.6–8.0
Should the 2003 standard for metallurgical coke be revised?
If the coal used is of low quality, the cost will be low; if we can ensure that the ash content of the coal used is low, then we can also achieve that, right?