100L/min热风炉的设计+文献综述
关键词： 热风炉；电阻炉；试验炉；硅碳棒
Abstract
A design of hot blast stove used for heating reducing gas which flowing towards rotary hearth furnace. The hot blast stove is a combination of the characteristics of the resistance furnace，with electric heating to achieve temperature above 1000 ℃，and silicon carbide rod is adopted to be electric heating element. Silicon carbon rod with vertical installation method is evenly distributed around the perimeter of the furnace. The thermal efficiency of resistance furnace is high, no combustion-supporting gas, making the atmosphere clean. The furnace can realize accurate temperature control, has temperature uniformity, and the temperature range is small. Electric power can be easily adjusted, as so as the temperature, and easy to realize automation control. The heat exchange tube of the hot blast stove adopt the advanced solid solution strengthening anti-oxidation nickel-based alloy(GH3044), said GH3044 has high plasticity and moderate heat intensity under 900 ℃, and with excellent oxidation resistance and good stamping and welding performance. In order to ensure the heat, lay regenerator in the heat exchange tube with high performance corundum ball. Corundum has excellent insulation performance in a high temperature, not easy to react with the electric heating body, resistance strongly to reducing atmosphere effect, the operating temperature can reach more than 1700 ℃. Designed a foraminiferous high aluminum tube between the silicon carbon rod and the heat exchange tube protecting the heat exchange tube, and prevent the heat exchange tube damage under high temperature for a long period of time. High aluminum material has excellent high-temperature chemical stability, and the operating temperature is between 1400 ~ 1600℃. The Silicon carbon rod has two layers of lining, lining is high aluminum tube and the outer layer is aluminum silicate fiber felt. Refractory fibre is a new type of refractory insulation materials. The Refractory fibre has a light weight, high temperature resistance and low thermal conductivity, its specific heat capacity and heat storage capacity are small, is a kind of flexible material. Aluminum silicate fiber felt is the most suitable refractory fiber to the electric furnace.