Temperature Field Study Of Zinc Refining Process In Plumbean Tower Burner

Iron and steel is a metal material which has the maximum output and wildest application, but its most prominent weakness is that it will be corroded by wet air in low temperature. In recent few years, this problem is more and more serious because the environment pollution is deteriorated gradually as the development of industrialization. Hot-galvanizing is the most fundamental, most wild-used and most effective method of protecting iron and steel from being corroded all over the world. Galvanizing industry is the biggest consumption field of zinc, and its consumption takes up40%of the total zinc consumption. The quantity of dross grows sharply as the galvanizing industry develops rapidly. The total output of dross in our country is100,000ton annually. Hot-galvanizing dross is a zinc regeneration resource of very high zinc content, and the recycling of dross also can extent the service life of zinc resource, as well as reduce product energy consumption, decrease environment pollution and increase social and economic benefits.This article takes over the mature technology about tower-type zinc refining furnace in dealing with crude zinc, and because of the shortage of low efficiency of traditional heat exchanger, high temperature of waste gas and large floor area, the mature heat accumulating type combustion technology is applied to the tower-type zinc refining furnace, for the purpose of recycling the afterheat of waste gas in most ultimate, reducing the waste gas temperature, improving the furnace heat efficiency and cutting down fuel combustion.Specific to the new process scheme, numerical district was meshed with hexahedral structured gridding through Gambit, and commercial software of FLUENT is applied to proceed tower-type zinc refining furnace, we can find the uniform temperature distribution by different excess air coefficient, air-inlet velocity, the ratio of primary and auxiliary air amount. The result is that the temperature field can meet the production requirement process when excess air coefficient takes1.3, air-inlet velocity takes lOm/s and the ratio is0.4:0.6, that’s to say small temperature difference may appears near the combustion chamber wall tray and around tray. According to the result of the simulation analysis, the regenerator replaces traditional clay heat exchanger is feasible and tremendous economic and social benefits can be produced.