重庆钢铁公司大型轧钢车间的型钢加热炉,原用发生炉热煤气加热,自去年12月天然气工程竣工投产后,已改用天然气加热。使用两个多月以来的情况表明,效果良好,共生产了38公斤重轨、24公斤轻轨、大型槽钢、工字钢及开坯等产品,基本满足轧机要求。加热钢锭的质量亦较均匀,经对310×310×1200毫米钻孔方钢锭在加热终了时,用热电偶进行测试,结果上面温度为1260℃,中心温度为1225℃,下面温度为1220℃,完全达到开轧温度的要求。该加热炉为端出料三段式。目前,因产量不大,只使用前加热及下加热两段进行生产,上加热段封闭未用。天然气耗用量为1200-1500米~3/时,前、下加热段热分配约各占50%,使用天然气的发热值为8400-8500大卡/米~3。该炉采用半喷射双管式烧咀,天然气压力为0.5～1.0公斤/厘米~2。试验结果表明,在加热炉上使用是成功的, Chongqing Iron and Steel Company’s large-scale steel rolling plant steel furnace, the original furnace hot gas heating, since last December natural gas project completed and put into production, has been converted to natural gas heating. The use of more than two months has shown that the effect is good and a total of 38 kilograms of heavy rail, 24 kilograms of light rail, large channel, I-beam and open billet products, basically meet the mill requirements. The quality of heating steel ingot is also more uniform, the 310 × 310 × 1200 mm square hole ingot at the end of the heating test with a thermocouple, the results above the temperature of 1260 ℃, the center temperature of 1225 ℃, the following temperature of 1220 ℃, Fully meet the requirements of open rolling temperature. The furnace for the end of the three-stage material. At present, due to the production is not large, only the use of two heating and heating before the production, the heating section closed unused. The consumption of natural gas is 1200-1500 m 3 / h, the heat distribution in the front and the bottom heating zone accounts for about 50% each, and the heating value of natural gas is 8400-8500 kcal / m³. The furnace uses a half-jet dual burner, natural gas pressure of 0.5 to 1.0 kg / cm ~ 2. The test results show that the use of the furnace is successful,