PROCESS FOR PREPARING SULFUR BY MEANS OF SULFATE/NITRATE IRON-CARBON REDUCTION AND RECOVERING DESULFURIZATION/DENITRIFICATION AGENT

摘要

A process for preparing sulfur by means of sulfate/nitrate iron-carbon reduction and recovering a desulfurization/denitrification agent. High concentration of SO₂ generated by sulfate calcination and NOx generated by heating and decomposition of a nitrate can be directly reduced into elemental sulfur vapor and N₂ by reacting with an iron-carbon material at a high temperature, and then sulfur is recovered from a sulfur recovery device by successively performing dedusting, cooling and refined dedusting processes. Metal oxides can replace alkali mineral resources such as limestone as raw materials of desulfurization (denitrification) agents. The process can achieve the recycling of desulfurization agents/denitrification agents.