Reducing the sulfur content of coke by increasing the content of thermally conditioned g coal in the batch

Abstract

In periods of economic growth, Ukrainian coke plants face a shortage of Zh and K coal, because of the high demand. In periods of economic stagnation, conversely, there is an excess of Zh coal, on account of the drop in demand. However, it is still important to introduce poorly clinkering coal in the batch. Ukrainian coal is known to have high sulfur content (up to 3.5% S). About 45–75% of that sulfur is passed on to the coke. Consequently, in order to reduce the sulfur content of the coke, it is expedient to include poorly clinkering coal in the batch, since typical low-carbon Donets Basin coal has a low desulfurization coefficient: 0.63. The corresponding figure for moderate-carbon coal is 0.70. Hence, by increasing the content of poorly clinkering coal in the batch, the sulfur content and cost of the coke may be reduced.