摘要:
高炉渣是炼铁过程中生产的副产品,也是工业生产的废弃物.随着钢铁企业的快速发展,高炉渣的排放量也日益增多.相比国外某些发达国家,我国高炉渣的利用率相对较低.高炉渣的堆放不仅浪费土地资源,还严重污染着环境,与我国现行的可持续发展计划相悖.但是如果将其经过回收和利用,便可以成为很好的矿物资源.与此同时,高炉渣也含有大量的显热.我国传统的水淬法对熔渣显热没有任何回收利用,白白地散失了大量的热量.针对这种情况,国内外科研人员进行多次的实验,主要可以分为两个方向:物理换热法和化学回收法.物理换热法主要是高炉渣通过特定的能量载体进行收集实现显热回收化学回收法是直接利用熔渣及显热生产高附加值的产品.与前者相比,化学回收法对显热的回收更有效率,更能体现高炉渣的综合利用.本文详细地综述了物理法和化学法显热回收,并分析了各种方法的优缺点.在此基础上,作者开发了新的回收方式:高炉渣干法粒化技术,这是高炉渣处理的发展趋势.
Abstract:
Ironmaking blast furnace slag is a byproduct of the production process,but also the industrial production waste.With the rapid development of steel industry,blast furnace slag emissions are increasing.Compared to some developed countries,China's utilization of blast furnace slag is relatively low.Blast furnace slag pile is not only a waste of land resources,but also seriously pollute the environment,and the sustainable development of China's current program contrary.But if it is through recovery and use,it can be good mineral resources.At the same time,blast furnace slag also contains a lot of sensible heat.China's traditional method of water quenching slag sensible heat without any recycling,and simply lost a lot of heat.In view of this situation,domestic and foreign researchers conducted several experiments can be divided into two directions:physical and chemical heat recovery method.Heat method primarily physical high slag collected achieve significant heat recovery through a specific energy carriers.Chemical recycling method is the direct use of the sensible heat of the slag and the production of high value-added products.Compared with the former,the chemical recovery process of sensible heat recovery more efficient,to better reflect the comprehensive utilization of blast furnace slag.This paper reviewed in detail the physical and chemical methods sensible heat recovery,and analyzed the advantages and disadvantages of each method.Based on this,the authors developed a new way of recycling:blast furnace slag dry granulation technology,which is the development trend of blast furnace slag processing.
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