本文介绍了应用三排小风口冷风冲天炉,层焦铁比为1:12时,仍能得到出炉温度为1410°c-1450°c的铁水的经验,指出在操作时只要严格控制风量,就能得到高温优质的铁水。还详细介绍了冲天炉常用测试仪表在本厂的应用。对曲线炉型卡腰效果进行了讨论,还对插入式风口与曲线炉型卡腰的效果进行对比与探讨。我厂2.5吨/时冷风冲天炉原来是按照上海新建机器厂多排小风口炉胆式热风冲天炉制造的。70年投产后,由于长期使用尺寸不合工艺要求的炉料(新建厂使用的是普通条铁破三块,每块还要再砸成3-4块,只有3公斤左右,而我们使用的是10公斤左右的铁块,回炉铁、废钢块度更大),操作也不严格,致使炉胆变形,常发生卡料现象,使用一年就报废了,严重地影响着生产。为了使生产正常进行,我们将热风炉胆取掉,改成了冷风冲天炉。在使用过程中又发现二次进风作用不明显,于是经过反复对比试验,取掉了二次进风,只用三排风口进风。从七五年以来,为了获得“高温、优质、低焦耗”的铁水,我们在炉型操作方面进行了不断地改造和试验,使焦铁比由原来的1:7-8提高到以1:10上,熔化率由原来的1.5-2吨/时,提高到2.3-2.7吨/时铁水出炉温度稳定在1400°C以上。一九七七年底西北五省(区)一机行业组织改炉节焦检查评比时。被选为先进炉型在全区推广。 This article describes the application of three rows of small-hole cold cupola stove, layer coke iron ratio of 1:12, still get the temperature of 1410 ° c-1450 ° c of molten iron experience, pointed out that the operation as long as the strict control of air flow, High-quality hot metal can be obtained. Also described in detail the cupola common test instruments in the factory. The effect of curvilinear calipers was discussed, and the effect of plug-in tuyere and curvilinear calipers was also compared and discussed. I plant 2.5 tons / hour cold cupola turned out to be in accordance with the Shanghai New Machine Factory multi-row small outlet furnace-type hot air cupola manufacture. 70 years after commissioning, due to long-term use of substandard processing requirements of the charge (the new plant is broken with ordinary bar three, each also smashed into 3-4 blocks, only about 3 kg, and we are using 10 Kilograms of iron, iron back, larger pieces of scrap), the operation is not rigorous, resulting in deformation of the furnace, card material often occurs phenomenon, the use of one year scrapped, seriously affecting the production. In order to make the normal production, we will remove the hot blast furnace, into a cold cupola. In the course of the use and found that the secondary air inlet effect is not obvious, so after repeated comparison tests, removed the second air inlet, only three air inlet into the wind. Since 75 years, in order to obtain “high temperature, high quality, low coke consumption” of hot metal, we have been in the furnace operation has been constantly modified and tested, so that the iron from the original iron 1: 7-8 increased to 1 : 10, the melting rate increased from 1.5-2 t / h to 2.3-2.7 t / h, the temperature of hot metal is stable above 1400 ° C. At the end of 1977, when one industrial organization in the five northwestern provinces Was selected as advanced furnace in the region to promote.