粉煤灰地质聚合法团聚细粒级铜矿石及其耐酸机理研究  

Study on Fine-Grained Copper Ore Agglomerated by Fly Ash Geological Polymerization Method and Its Acid Resistance Mechanism

作　　者：张谦 印万忠[1] ZHANG Qian;YIN Wanzhong(Zijin School of Geology and Mining,Fuzhou University,Fuzhou 350108,China)

机构地区：[1]福州大学紫金地质与矿业学院,福建福州350108

出　　处：《金属矿山》2023年第2期254-259,共6页Metal Mine

基　　金：国家自然科学基金面上项目(编号:52174239)。

摘　　要：为了解决低品位铜矿石经高压辊磨机破碎后细粒级含量增加对后续直接堆浸产生的偏析问题,提出了粉煤灰地质聚合细粒级铜矿石的方法。该方法利用自制转鼓对高压辊磨机破碎后的细粒级(-1.7mm)铜矿石在粉煤灰地质聚合反应的基础上进行制团,进而考察粉煤灰添加量、水添加量、碱激发剂用量及其中硅酸钠含量对团聚体粒度和耐酸性质的影响。采用XRD、FTIR分析测试技术对矿石团聚和耐酸机理进行了分析。结果表明:通过加入粉煤灰可以提高团聚体的耐酸性,且增加粉煤灰添加量可使团聚体的耐酸性得到提升,在粉煤灰添加量为6%时耐酸性最好;增加碱激发剂用量以及水添加量都有利于团聚体的成团粒度,并提高其耐酸性;碱激发剂中硅酸钠含量越高团聚体的耐酸性越好。The increase in fine-grained content of low-grade copper ore after crushing by high pressure roller mill will cause segregation of subsequent direct heap leaching. In order to solve this problem,a method for the geological polymerization of fine-grained copper ore by fly ash was proposed. In this method,the fine-grained(-1. 7mm) copper ore crushed by the high pressure roller mill was agglomerated by self-made bowl on the basis of the geological polymerization reaction of fly ash,and the effects of fly ash addition,water addition,alkali initiator dosage and sodium silicate content on the particle size and acid resistance properties of aggregates were investigated. XRD and FTIR analysis and testing techniques were used to analyze the mechanism of ore agglomeration and acid resistance. The results show that the acid resistance of the agglomerate can be improved by adding fly ash,and with the increase of fly ash addition,the acid resistance of the agglomerate is also improved,and the acid resistance is the best when the fly ash addition amount is 6%. The increase of alkali initiator dosage and water addition are conducive to the improvement of agglomerate size and acid resistance. The higher the content of sodium silicate in the alkali initiator,the better the acid resistance of the agglomerate.

关 键 词：粉煤灰 低品位铜矿石 地质聚合反应 制团 

分 类 号：TD926.4[矿业工程—选矿]