Abstract
On the understanding that the characteristics of the gas flow have a major contribution to slagging, a change in the fineness of pulverized coal necessitates taking into account the change in the properties of fly ash, which can either improve or worsen the slagging situation. A decrease in the pulverized coal particle size leads to a reduction of the fly ash particle size, an intensification of the formation of friable deposits, and an increase in the degree of conversion of pyrite to solid iron oxides. This reduces or prevents the formation of strong primary deposits and critical slagging situations. The smaller the dust particles, ceteris paribus, the lower the slagging rate. Unlike coarser pulverized coal, the strength of deposits increases due to sintering and decreases due to sulphatization.
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