黄金科学技术
黃金科學技術
황금과학기술
GOLD SCIENCE AND TECHNOLOGY
2013年
3期
85-90
,共6页
金%氰化%可浸性%工艺方案%试验研究
金%氰化%可浸性%工藝方案%試驗研究
금%청화%가침성%공예방안%시험연구
gold%cyaniding%leaching process scheme%experimental investigation
为了促进对低品位金矿资源的回收利用，在对潼关地区低品位含金氧化矿石的化学成分和矿石特征进行研究的基础上，开展矿石可浸性、泥化程度检查、NaCN 浓度、喷淋强度、吸水性、渗透性和初始耗碱量等条件试验，对其氰化浸出性能及影响因素进行了试验研究。研究认为，潼关地区低品位金矿石氧化程度较低，属原生矿—半氧化矿石的过渡类型；矿石裂隙不发育，岩石结构紧密，且自然金以中—粗粒为主，属不易堆淋矿石；矿石氰化有害元素含量低，在可浸性试验中，经24 h 机械搅拌获得浸出率为95.2%，为良好的可浸性矿石。条件试验及综合柱浸试验获得-8 mm 粒级矿石27 d 浸出率为66%，说明此类矿石仍为堆淋有效矿石，其堆淋最佳生产工艺技术条件：矿堆规模5000 t，粒级-8 mm，筑堆高度3 m，NaCN 浓度0.03%～0.06%，pH 值10～12，喷淋强度20～50 L/（m2·h），喷淋时间30 d。从试验结果来看，该类矿石堆淋浸金回收率偏低，只有在开采富矿同时作为废矿石回收利用才能获得效益。由于此类低品位矿石氧化程度差，为良好的可浸性矿石，因此最佳方法应为全泥氰化法。
為瞭促進對低品位金礦資源的迴收利用，在對潼關地區低品位含金氧化礦石的化學成分和礦石特徵進行研究的基礎上，開展礦石可浸性、泥化程度檢查、NaCN 濃度、噴淋彊度、吸水性、滲透性和初始耗堿量等條件試驗，對其氰化浸齣性能及影響因素進行瞭試驗研究。研究認為，潼關地區低品位金礦石氧化程度較低，屬原生礦—半氧化礦石的過渡類型；礦石裂隙不髮育，巖石結構緊密，且自然金以中—粗粒為主，屬不易堆淋礦石；礦石氰化有害元素含量低，在可浸性試驗中，經24 h 機械攪拌穫得浸齣率為95.2%，為良好的可浸性礦石。條件試驗及綜閤柱浸試驗穫得-8 mm 粒級礦石27 d 浸齣率為66%，說明此類礦石仍為堆淋有效礦石，其堆淋最佳生產工藝技術條件：礦堆規模5000 t，粒級-8 mm，築堆高度3 m，NaCN 濃度0.03%～0.06%，pH 值10～12，噴淋彊度20～50 L/（m2·h），噴淋時間30 d。從試驗結果來看，該類礦石堆淋浸金迴收率偏低，隻有在開採富礦同時作為廢礦石迴收利用纔能穫得效益。由于此類低品位礦石氧化程度差，為良好的可浸性礦石，因此最佳方法應為全泥氰化法。
위료촉진대저품위금광자원적회수이용，재대동관지구저품위함금양화광석적화학성분화광석특정진행연구적기출상，개전광석가침성、니화정도검사、NaCN 농도、분림강도、흡수성、삼투성화초시모감량등조건시험，대기청화침출성능급영향인소진행료시험연구。연구인위，동관지구저품위금광석양화정도교저，속원생광—반양화광석적과도류형；광석렬극불발육，암석결구긴밀，차자연금이중—조립위주，속불역퇴림광석；광석청화유해원소함량저，재가침성시험중，경24 h 궤계교반획득침출솔위95.2%，위량호적가침성광석。조건시험급종합주침시험획득-8 mm 립급광석27 d 침출솔위66%，설명차류광석잉위퇴림유효광석，기퇴림최가생산공예기술조건：광퇴규모5000 t，립급-8 mm，축퇴고도3 m，NaCN 농도0.03%～0.06%，pH 치10～12，분림강도20～50 L/（m2·h），분림시간30 d。종시험결과래간，해류광석퇴림침금회수솔편저，지유재개채부광동시작위폐광석회수이용재능획득효익。유우차류저품위광석양화정도차，위량호적가침성광석，인차최가방법응위전니청화법。
In order to promote the recycling of low grade gold resources,many conditional experiments about ore leaching,mudding degree,concentration of NaCN,sprinkling,obsorbency,permeability and origin caustic con -sumption are carried out to study the cyanide leaching character and affecting factors,on the basis of research on chemical composition and ore character of low grade oxided gold ore.The results show that low grade gold ore in Tongguan area is a transitional type between primary ore and half oxidized ore which is of low oxidization level;it is a kind of ore which is hard to leach with undeveloped fracture and tight rock structure,and the natural gold is composed mainly of medium and coarse grain;it is also a kind of leachable ore with low level of harmful elements the leaching rate of which is 95.2% in a leachability test.The rate of 27 days leaching of -8 mm ore obtained from the conditional and composite column leaching experiments is 66%,which shows that the ore is leachable,and the leaching production technique conditions are 5 000 tons ore per heap,-8 mm fraction,3 m heap height,NaCN concentration is 0.03% to 0.06%,pH value is 10 to 12,the volume of sprinkling is 20~50 L/(m2·h) and the time of sprinkling is 30 days.The results of experiment show that the recycle rate of this kind of ore is low,benefit can be achieved only if it can be recycled as waste ore when bonanza is mined.Because this kind of low grade ore is pretty leachable,and the oxidation degree is low,the best way is all-slime cyanidation.
