Strategy and practice of comprehensive resource utilization of industrial solid waste

In order to solve the problem of turning solid waste such as scraps and flyash produced by steel works in China into useful resources, JISCO Group′s successful practice of making use of flyash and suspension magnetization roasted tailings as industrial resources is cited as an example to explore the way for comprehensive utilization of solid waste. Based on the case study and field investigation, a series of strategies is proposed as follows: strengthening cooperation between governments and related enterprises and encouraging the eligible research institutions and enterprises to co-develop shared experimental, testing, pilot-scale and industrial testing platforms; promoting close collaboration between institutions of higher learning, research organs and sci-tech innovation enterprises to develop a pathway that integrates production, learning, research and utilization, so as to advance the emergence of new theories, new techniques and new modes with respect to comprehensive utilization of industrial waste; thanks to the unique 3-dimensional reticular structure and excellent performance, the geopolymer can find applications in various fields, and its use as building refractory and adsorbing material or as a polymeric gelatinizing material in place of cement can help reduce carbon emissions of building industry; the use of portland or slag-based cement as underground worked-out area backfilling material is a waste of resource and is high in cost. Since no strict requirement is placed on the strength of the backfilling material, the use of industrial waste as a new cemented backfill can partly or completely replace cement; expanding the solid waste disposal and utilization channels at the source and seeking treatment methods which are low in capital cost, good in economic performance and high in capacity to allow the solid waste to be disposed of in a diversified manner. Study results show that through expanding utilization fields, giving full play to the guiding role of standards, strengthening upstream and downstream coordination, and practice of diversified disposal strategies, the percentage of solid waste utilized as industrial resources can be effectively increased; particularly, the use of geopolymer shows noticeably favorable environmental benefit and utilization potential; for realizing comprehensive utilization of industrial solid waste, the solid waste treatment methods currently applied need to be innovated and improved by governments, enterprises and research institutions through concerted efforts, so as to promote the transformation of industrial solid waste into high value-added products and drive the growth of green economy.