Abstract
With the rapid development of the steel industry, the accumulation of steel slag increases year by year, occupying a large amount of farm land and leading the problem of environmental pollution and safety hazards. The current comprehensive utilization rate of steel slag is still very low in China, far behind the developed countries. The low comprehensive utilization rate of steel slag is a stumbling block to the green and sustainable development of the Yangtze River Economic Belt. Improving the comprehensive utilization rate of steel slag is an imperative way to resolve these problems and to realize sustainable development for the steel enterprise. Steel slag presents porous structure and large surface area; in addition, it is easy to separate from water due to its high density. Therefore, the application of steel slag in industrial waste water treatment has received intensive attention in recent years. This paper systematically introduced the research progress of steel slag resource utilization as absorbent materials for waste water and proposed the important improved method and critical problems for steel slag as absorbent materials.
Highlights
Reducing, reusing and recycling are the main methods to deal with solid waste
Steel slag is a kind of solid waste produced in the process of steel production
Landfill is the most commonly used method to dispose of steel slag, but this method occupies a large amount of agricultural land
Summary
Reducing, reusing and recycling are the main methods to deal with solid waste. Steel slag is a kind of solid waste produced in the process of steel production. For every 1 ton of steel produced, 125-140 kg steel slag will be produced. Landfill is the most commonly used method to dispose of steel slag, but this method occupies a large amount of agricultural land. The utilization rate of steel slag in China is only about 30% at present. Further expanding the application range of steel slag and improving the utilization rate of steel slag are the main means to solve this problem. The resource utilization of steel slag is mainly used as materials for metallurgical furnace, admixture and aggregate of concrete, paving and construction materials, materials for waste water treatment, and fertilizer in agriculture etc. The application of steel slag in waste water is economical and effective because of its low price and large dosage, and it is an important way to recycle steel slag. The application of steel slag as adsorbent material for waste water treatment is introduced
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