Study On The Removal Of Hydrogen Sulfide With Blast Furnace Dust

The hydrogen sulfide is a toxic compound. And it will corrode equipment and pipeline while transportation. The blast furnace dust is generated from the blast furnace and it contents much iron which will take waste of resources if not reclaim. This article introduces the study on the removal of hydrogen sulfide with blast furnace dust. The slurry used to desulfurization process is made of blast furnace dust and water. It was found that the desulfurization can reach more than 80 percent, which can even up to 90 percent under sufficient conditions.The mechanism of desulfurization with the blast furnace dust slurry can be summed up by “desulfuration by dry process used with wet process”. It combines the mechanism of desulfuration by dry process with the characterist of desulfuration of wet process such as continuous operation, small footprint and low labor intensity. In this paper, in order to achieve efficient desulfurization, we explore the best process conditions of desulfurization.It was found that the desulfurization will reduce with the increase of gas velocity; it will increase with the increase of slurry concentration; while increasing the value of L/G, the desulfurization will be better; and the slurry will play a better role while the concentration of the gas is 6g/m3 or less than this value. For the high concentration, the slurry is ineffective; the padding can promote the desulfurization which must be larger; the lower temperature of the slurry may be better. Under the laboratory conditions, 4%~5% slurry contact with 6g/m3 gas in the 1.5 meters tower reaction. The desulfurization rate will be 85 percent when the gas velocity value is 0.105m/s, and the value of L/G is 20~30L/m3.The blast furnace dust have a particle size, which is suitable to be mixed with water directly. The process is simple and the desulfurization is good. It can meet the requirement of controlling the pollution with the industrial waste. The slurry can be used on the coke-oven gas(COG).