铁尾矿应用于预拌混凝土的技术研究

Iron Ore Tailings Application Study in Ready-Mixed Concrete

铁尾矿是钢铁厂选矿厂选矿后的固体废弃物形成的重要污染源,堆存尾矿占用大量的土地,营运费用高,成为安全隐患,导致资源的严重浪费。本文选取河北唐山地区首钢矿业公司水厂选矿厂的铁尾矿砂石进行系统研究,通过大量的试验数据积累,从技术质量角度进行配合比的优化,在一定的试验基础上,再通过试生产,实际检验铁尾矿砂石和应用后的混凝土的工作性、力学性能及长期耐久性指标情况。同时,通过一定数量的尾矿采购和运输供应,测算材料成本和综合成本。铁尾矿砂石作为一种新材料在预拌混凝土中的应用不仅使生产应用企业获得可观的经济效益,还收到了良好的社会效益。

Iron ore tailings is a kind of solid waste after the steel mill and concentrating mill dressing. In china iron ore tailings resources is very rich but has been low utilization for a long time Iron tailings become an important source of pollution Stockpiling large areas of land occupied by tailings High operating costs so it become a security risk bring a serious waste of resources.This paper selects Tangshan Shougang Mining Company Water Concentrator area of iron tailings sand systematic studying First of all according to the current implementation standard of construction sand and gravel that ordinary concrete used to test iron tailings corresponding items using in ready mixed concrete.Through the large number of experimental accumulated data first from a technical point of view optimize mix design based on certain tests Iron sand tailings material as a new application in the ready-mixed concrete production and application of business not only can bring considerable economic benefits but also receive good social benefits. Consistent with the current policy of development of circular economy turning waste into wealth and comprehensive utilization of resources meanwhile also internationally such as in American LEED certification made some contributions.