Recovery and utilisation of sulfur in coal

Nakagome Tadashi

doi:10.3775/jie.37.70

Regard to recovery and utilisation of sulfur in coal, auther discusses three items as follow, 1)Recovery of pyrite in coal preparotfon. It has been commented on this question as uneconomical in Japan. But as results of some experiences with Miike coal, , auther feels a provability of pr-actical value in the recovery of pyrite from sulfur rich coal such as Miike.80 2)Utilisation of H2S recovered from coal gas. As industrial utilisations, auther introduces the manufacturing of sulfuric acid with Chamber and Wet-contact processes, the elemental sulfur with Claus process and thio-urea with Miike process. As the material for Chamber process, the recovered H2S, Containing HCN, has a merit to save the comsumption of HNO3. Auther writes some characteristrc constructrons of Claus process, installed in U. S. A, Germany, Bergium and Miike, Japan. As supplements for, wet contact process, Auther introduces the perfomance results of vacuum carbonate process, and progresses of coffin process. As a promissing dry desulfurization method, Contineous Alumina process is also dis-cussed. 3)Recovery and utilisation of dilute H2S and SO2 Auther proposes a new method for making elemental sulfur from dilute H25, which isnot combustible in common furnace. The method is consists in oxydation of H2S under the electric dicharge. Auther also introduces some instances to get (NH4) 2SO4 and sulfur from dilute SO2contained in the flue gas of power station.

Recovery and utilisation of sulfur in coal

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