基于地质聚合反应的低品位铜矿石制团及机理  

Agglomeration and its acid resistance mechanism of low-grade copper ore based on geopolymerization

作　　者：陈克强 印万忠[1] 饶峰 唐远[2] 朱张磊 马英强[1] CHEN Ke-qiang;YIN Wan-zhong;RAO Feng;TANG Yuan;ZHU Zhang-lei;MA Ying-qiang(College of Zijin Mining,Fuzhou University,Fuzhou 350116,China;College of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China)

机构地区：[1]福州大学紫金矿业学院,福州350116 [2]东北大学资源与土木工程学院,沈阳110819

出　　处：《中国有色金属学报》2020年第6期1446-1453,共8页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(51804081);福建省自然科学基金资助项目(2019J01253)。

摘　　要：通过转鼓对高压辊磨机破碎后的低品位铜矿石进行制团并利用地质聚合反应固化团聚体,考察碱激发剂配比和用量、水添加量、偏高岭土添加量等因素对团聚体粒度、抗压强度和耐酸性质的影响,并借助FT-IR和NMR分析技术研究地质聚合反应提高团聚体耐酸性的机理。结果表明:在制团过程中,碱激发剂用量和水添加量的增加均有助于增大团聚体的成团粒度并提高其耐酸性;碱激发剂中硅酸钠含量高时团聚体耐酸性好,少量氢氧化钠的引入可提高团聚体的强度;偏高岭土的加入能显著提升团聚体的耐酸性。FT-IR和NMR测试结果表明,地质聚合物凝胶含量增多是团聚体耐酸性增强的原因。A low-grade copper ore from the high-pressure grinding roll was agglomerated by using a drum,and then geopolymerization was used to cure the agglomerates.The effects of alkali activator composition and dosage,water content and metakaolin addition on particle size,compressive strength and acid resistance of agglomerates were studied.The mechanism of geopolymerization to improve the acid resistance of agglomerates was studied by FTIR and NMR measurements.The results show that alkali activator and water content will help to improve the particle size and acid resistance of agglomerates.It can be seen that reducing of sodium silicate content in the alkali activator results a lower acid tolerance.Adding suitable amount of sodium hydroxide the compressive strength of the agglomerates can be enhanced and their acid resistance can be significantly improved in the presence of metakaolin.FT-IR and NMR results indicate that the increase of geopolymer gels content is responsible for the enhancement of acid resistance of agglomerates.

关 键 词：低品位铜矿石 地质聚合反应 制团 耐酸性 

分 类 号：TF046[冶金工程—冶金物理化学]