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铝作为强脱氧剂早已普遍用于炼钢工业,而加铝的数量,加铝的方法还有不少问题需要认真地进行研究。一、目前国内普遍用投入或插入的方法加铝锭或铝片。而铝的比重比钢液和钢渣都小,所以大部分铝上浮至渣面烧损掉,这一部分空烧损的铝占总加铝量的75～80%,说明目前通用的加铝方法,不但脱氧效果差,也造成很大的浪费。铝不但价格高,而且每生产一吨铝仅电能消耗达15,000度以上。如果采用合理的加铝方法,在炼钢工业中大幅度降低铝的消耗,可以降低钢的成本,节约大量能源,其潜力是比较大的。为此,对现有的几种可能加铝方法进行分析:1.投入法加工业纯铝,铝的利用率低,浪费大,脱氧效果很不稳定,钢中残余铝量一般小于0.01%,不能保证钢锭质量,铝的利用率仅达10%左右,所以此方法很不合理,不宜应用。
As a strong deoxidizer, aluminum has long been commonly used in the steelmaking industry. However, there are still many problems with the quantity of aluminum and the aluminum method that need to be carefully studied. First, the current domestic investment or insertion method commonly used aluminum ingots or aluminum. While the proportion of aluminum than the molten steel and steel slag are small, so most of the aluminum floating to the slag surface burning loss, this part of the empty burning loss of aluminum accounted for 75 to 80% of total aluminum, indicating the current common Al method, Not only deoxygenation effect is poor, but also caused a great waste. Not only is aluminum expensive, it costs more than 15,000 kWh for every ton of aluminum produced. If the reasonable method of adding aluminum, in the steel industry to significantly reduce the consumption of aluminum, can reduce the cost of steel, saving a lot of energy, its potential is relatively large. To this end, the existing methods may be analyzed several aluminum: 1 input method of processing industry, pure aluminum, aluminum utilization rate is low, waste, deoxidation effect is very unstable, the amount of residual aluminum in steel is generally less than 0.01% Can not guarantee the quality of steel ingot, aluminum utilization rate of only about 10%, so this method is unreasonable, should not be applied.