Influence Of Blast Furnace Top Gas Dust Removal Of HCl

With the popularity of blast furnace gas dry dust removal technology,the use of imported high chloride iron ore,HCl in the blast furnace gas of the negative impact of the blast furnace production safety is increasingly prominent.HCl in the blast furnace gas,the main cause of blast furnace gas pipeline system rapidly deposited salt corrosion,TRT unit leaf,hot blast stove regenerator checker brick erosion speed,caused serious influence normal production of blast furnace.Furnace dust through research on the effect of HCl in the blast furnace top gas removal process and found that the blast furnace top gas stove dust in the sintering ore dust,dust pellets,block the existence of the pulverized coal mine dust,coke dust and leads to the deterioration of the effect of dechlorination,dust,dust pellets and sinter ore dust concentration and particle size increase will make effect of HCl in the blast furnace top gas removal deteriorating even further.Coke dust and the enhancement of pulverized coal concentration will prompt effect of HCl in the blast furnace top gas removal deteriorating.When coke dust and pulverized coal particle size is fine,appropriate increase of pulverized coal and coke dust particle size can improve the effect of HCl in the blast furnace top gas removal,but too coarse granularity is not conducive to improve the removal of HCl in the blast furnace top gas.Through research and development of blast furnace top gas dechlorinating agent found that the blast furnace top gas special dechlorinating agent with proper proportion of bag dust,electric furnace reduced slag,red mud,not only overcome the blast furnace gas of CO2 on the properties of chemical dechlorinating agent in check,and make the dechlorinating agent dechlorination reaction before and after the good mechanical strength,their appropriate proportion is 8%,12% and 15% respectively;Appropriate particle size decreases,and electric furnace reduced slag and red mud to improve dechlorinating agent chemical properties and mechanical strength,their particle size should be around38 microns.Bag is grey,electric furnace reduced slag,red mud with addition of not only reduce the cost of the dechlorinating agent,but also improves the dechlorination efficiency,at the same time opens a new way of comprehensive utilization of them,solved the pollution to the environment.