摘要
为寻求一种将二类固废改性处理的技术,用于专门治理硫铁矿废弃渣,本文以略阳县麻柳铺硫铁矿区采矿废渣堆二类固废为例,通过硫铁矿废弃渣制备了地质聚合物试块,测试了其抗压强度和重金属元素的毒性浸出数值,并分析了其重金属固化率。试验表明,测试的地质聚合物试块的强度随着养护龄期的增长而增大,在室温下养护7d、14d、28d的无侧限抗压强度分别为0.183MPa、0.350MPa、0.753MPa。从重金属固化率来看,硫铁矿弃渣地质聚合物对Cd、Pb、Ni、Zn、Co、Mn等离子均能起到较好的固化效果,其固化率可达90%以上,且稳定性较好,各元素酸浸的浸出值均远低于地表Ⅱ类水的限值。综合分析认为,硫铁矿弃渣地质聚合物对于硫铁矿废弃渣的治理具有比较好的适宜性。
This study aims to develop a technology to modify and treat ClassⅡsolid waste for the specialized treatment of sulfuric iron ore waste slag.To achieve this goal,this study utilized ClassⅡsolid waste from a mining waste heap in the Malyupu sulfuric iron ore area of Lueyang County as an example.The study prepared geopolymer test blocks using sulfuric iron ore waste slag and then tested the compressive strength of the blocks and the toxic leaching values of heavy metal elements.Additionally,the solidification rate of heavy metals in the blocks was analyzed.The results demonstrated that the strength of the geopolymer specimens increased with the curing age.Specifically,the unconfined compressive strengths of the specimens cured at room temperature for 7,14,and 28 days were 0.183 Mpa,0.350 Mpa,and 0.753 Mpa,respectively.The geopolymer derived from sulfuric iron ore waste-discarded slag demonstrated the effective solidification of heavy metal ions such as Cd,Pb,Ni,Zn,Co,and Mn ions.A better curing effect,curing rate exceeding 90%or more,and good stability.The leaching values of the elements under of acidic leaching conditions were significantly lower than are far below the limit values for ClassⅡsurfaceⅡwater value of surfaceⅡwater.The comprehensive analysis suggests that the geopolymer produced from sulfuric iron ore waste slag exhibits relatively good suitability for the management of sulfuric iron ore waste slag management has a relatively good suitability.
作者
高卫
刘阳
贺俊
李华南
李麟
Gao Wei;Liu Yang;He Jun;Li Huanan;Li Lin(Shaanxi Mining Development Industry and Trade Co.,Ltd.,Xi'an 710054)
出处
《陕西地质》
2024年第1期54-61,共8页
Geology of Shaanxi
基金
陕西地矿集团有限公司科研专项资助项目“地质聚合物在硫铁矿酸性水治理工程中的应用研究”(KY202207)。
关键词
硫铁矿弃渣
地质聚合物
二类固废
浸出毒性
固化效果
Sulfide iron ore rejects
geopolymers
ClassⅡwastes
leaching toxicity
curing effectiveness
