Method to enhance removal of sulfur compounds by slag

摘要

Disclosed is a process for combustion of carbonaceous substances containing ash and sulfur in slagging combustors wherein the fraction of sulfur retained in the slag is enhanced, emissions of nitrogen oxide are reduced, and operating problems with the furnace are avoided. The process comprises control of slag within a temperature range of 2000-2500. degree. F., slag stoichiometry less than oxidizing, and gas phase stoichiometry near stoichiometric.