Investigation of Use of SYSCO Slag for Acid Mine Drainage Treatment

矿渣是炼钢过程中的一种颗粒状副产品，主要由钙和硅的氧化物组成，目前被重新用于多种应用，包括作为水泥添加剂和代替砾石. PortsideAggregates有限公司与新斯科舍省土地公司签订了合同。处理和销售所有炉渣材料留在原钢铁厂和炼焦炉网站在悉尼，新斯科舍省（NS）。从铁矿石中冶炼铁产生的高炉风冷渣（ACBFS）比平炉渣（OHS）得到了更多的研究，并为这种高钙含量的废渣材料建立了再利用途径。相比之下，职业健康安全还没有得到很好的研究和积极的市场再利用这种废物的钢铁制造副产品是有限的。OHS比ACBFS的钙含量更低，铁含量更高，限制了其重复使用的选择。在这个项目中，将测试新斯科舍省悉尼市100多年的钢铁制造业的OHS从煤矿废水中去除金属和酸性的能力，并与更好理解的ACBFS进行比较。两个处理过程将进行测试，一个是主动处理过程，需要能量来混合矿渣和矿井废水，一个是被动处理过程，可以用来连接废弃矿井的排水系统。鉴于OHS是Portside Aggregates有兴趣开发的一种资源，通过达尔豪西大学水资源研究中心（CWRS）的技术专长和可用资源为这种材料寻找新市场，将通过增加潜在销售额和恢复环境，为公司和城市带来好处。

Slag is a granular by-product of the steel-making process composed mainly of calcium and silicon oxides and iscurrently reused in several applications including as a cement additive and in place of gravel. PortsideAggregates Ltd. has a contract with Nova Scotia Lands Inc. to process and sell all slag material left on theformer steel plant and coke ovens sites in Sydney, Nova Scotia (NS). Air-cooled blast furnace slag (ACBFS),which comes from the smelting of iron from iron ore, has been more studied than open hearth slag (OHS) andreuse avenues have been established for this higher calcium content waste slag material. In contrast, OHS hasnot been as well researched and active markets for reuse of this waste by-product of steel manufacturing arelimited. OHS a lower calcium content and contains more iron than ACBFS, limiting its reuse options. In thisproject, OHS from over a hundred years of steel making in Sydney, Nova Scotia will be tested for its ability toremove metals and acidity from coal mining wastewater and compared to the better-understood ACBFS. Twotreatment processes will be tested, an active treatment process where energy is required for mixing of the slagwith the mine wastewater, and a passive treatment process that could be used to line drainage systems fromabandoned mines. Given that OHS is a resource Portside Aggregates is interested in being able to exploit,finding new markets for this material through the technical expertise and resources available at the Center forWater Resource Studies (CWRS) at Dalhousie University will be beneficial for the company and thecommunity by increasing potential sales and restoring the environment.