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一、造渣制度我厂在今年4月份前是采用单渣法吹炼的,其间在1955年9月采用前少后多的造渣方法,第一批渣料平均每吨铁水加石灰30—35公斤,第二批再加45—50公斤,到1955年11月中改为前多后少的造渣法,第一批渣料每吨铁水加石灰50—60公斤,第二批加40—45公斤。今年4月初因单渣法的吹损很大,学习兄弟厂扒渣经验,并对炉渣的扒去数量也作了研究,5月开始即按双渣法操作,6月份又进行了留渣试验(将上一炉的渣不全部倒净,留作下一炉之渣)留渣量约为总渣量的1/3。现将这三种造渣制度对吹损、温度、时间、元素变化等比较如下:(1)对吹损的比较:在吹炼条件相同的情况下,用单渣法操作时在矽分氧化终了第二次渣料加入后即发生大量喷溅,喷出物中有大量氧化铁与金属铁,在4月初,单渣法测定时发现化铁炉的熔损还不算很高(在1.75—1.83%,平均1.79%),而转炉的吹损则平均高达18.73%。
First, the slagging system I plant in April this year is the use of single slag blowing method, during which in September 1955 using less slagging method, the first batch of slag per ton of molten iron plus lime 30- 35 kg, the second batch plus 45-50 kg, by mid-1955 in November to less than before the slagging method, the first batch of slag per ton of molten iron plus lime 50-60 kg, the second plus 40 -45 kg. Early April this year, due to a single slag blowing a great loss, learning brother brothers slag experience, and the amount of slag to go to the amount of also made a study, starting in May that is based on double-slag operation, in June and the residue test (The slag on the previous furnace is not all poured clean, leaving the slag for the next furnace) Residue residue is about 1/3 of the total slag. Now these three kinds of slagging system on the blowing loss, temperature, time, elemental changes are compared as follows: (1) Comparison of blow loss: blowing conditions in the same circumstances, After the end of the second residue was added after a large number of splashes, a large number of iron oxide and iron in the discharge, in early April, single slag method found when the loss of melting furnace is not too high (1.75 -1.83%, an average of 1.79%), while the blow-down of the converter averaged as high as 18.73%.