测定钢铁中碳、硫用的管式燃烧炉一般均采用硅碳棒加热元件,但升温时间长,需要2～2.5小时。用大电流快速升温易使硅碳棒断裂。采用了山东省生建八三厂生产的硅碳管(图1),自制了硅碳管燃烧炉,经过长时间的实践,取得了效果。硅碳管具有良好的耐急冷急热性能,发热均匀,升温快,一次就可升到较大的电流(12A～20A),在0.5～1小时就可升到工作温度。 Determination of carbon steel and sulfur in the tube furnace are generally used silicon carbide heating element, but the heating time is long, it takes 2 ~ 2.5 hours. Rapid heating with a large current easy to silicon carbide rod fracture. The production of silicon carbon tube (Figure 1) produced by Shandong Shengsheng Eighth and Third Factory was adopted. The silicon-carbon tube burning furnace was made by ourselves. After a long time of practice, the effect has been achieved. Silicon carbon tube has a good resistance to cold and heat performance, uniform heat, fast heating, once you can rise to a larger current (12A ~ 20A), in 0.5 to 1 hour can rise to the operating temperature.