Variation in mineral composition of coal during enrichment and coking

The parameters I b and B b used in developing an optimal coking-batch composition are determined from data on the chemical composition of the ash in Donetsk Basin and other coal. It is found that, when the ash content is reduced in deeper enrichment of coal with an increased content of fine pyrite, there will be accompanying increase in the Fe 2 O 3 content and decrease in the SiO 2 content of the ash in lighter fractions. This increases I b . In other words, reducing the ash content of the coal is an unpromising means of increasing CRI and CSR of the coke produced. Thee ash-containing elements (silicon, aluminum, and iron) are experimentally proven to transfer from coal to coke. Specific behavior of calcium, magnesium, alkali metals, and sulfur during coking.