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在我国为了充分利用地方分散资源,因地制宜,已兴办许多中小型钢铁工业,直接为农业机械化服务,为发展地方工业服务。许多这种地方小炼铁厂的小高炉,一般采用蓄热式热风炉,提高高炉风温,降低炼铁焦比,但是,这种热风炉体积庞大,钢材和耐火材料消耗量多。一座小高炉建三座考贝式热风炉,其投资几乎占全厂总投资的一半。同时,考贝式热风炉不适应加热小风量的特点,如13立方米小高炉的考贝式热风炉,格孔为80×80×45毫米,送风期蓄热室中气流速度仅0.85—1.6米/秒,比大高炉低(大高炉的约为小高炉的4—5倍),热交换系数约5.8—8.6千卡/米~3·周期·℃,只有大高
In our country, in order to make full use of local resources for decentralization and to meet local conditions, many small and medium-sized steel industries have been established to directly serve agricultural mechanization and serve the development of local industries. Many small blast furnaces in these small local ironworks generally use regenerative hot blast stoves to raise blast furnace air temperature and reduce ironmaking coke ratio. However, such stoves are bulky and consume more steel and refractory materials. A small blast furnace built three test-type stoves, its investment accounts for almost half of the total plant investment. At the same time, the test-style hot stove does not meet the characteristics of heating a small amount of air, such as 13 cubic meters of small blast furnace test-type stove, grid is 80 × 80 × 45 mm, air supply regenerator in the air flow rate of only 0.85- 1.6 m / s, lower than the large blast furnace (large blast furnace is about 4-5 times the small blast furnace), the heat exchange coefficient of about 5.8-8.6 kcal / m ~ 3 · cycle · ℃, only high