溶浸提铜技术发展概况及前景分析

本文阐述了溶浸提铜技术国内外发展概况，就其研究成果、生产经验及发展方向进行了归纳与分析，并对其在我国的应用前景进行了探讨。     

Flotation performances of polymorphic pyrrhotite

The floatability of different crystalline structures of pyrrhotite (monoclinic and hexagonal) was studied. It is shown that the floatability of monoclinic and hexagonal has obvious difference, and that the flotation recovery of monoclinic pyrrhotite is larger than that of hexagonal pyrrhotite using different collectors. When butyl dithiophosphate is used as the collector, the recovery is larger than that by sodium butyl xanthate and sodium diethyl dithiocarbamate. At the pH values ranging from 6 to 9, monoclinic pyrrhotite can be floated well, and the flotation recovery is higher than 90%. Monoclinic and hexagonal pyrrhotites are more easily activated by Cu²⁺ in acidic conditions than in alkaline conditions. But Cu²⁺ cannot activate hexagonal pyrrhotite using sodium diethyldithiocarbamate as the collector. By the measurement of contact angle, it is indicated that monoclinic and hexagonal pyrrhotites float well and are easily activated by Cu²⁺ when dithiophosphate is used as the collector. Using sodium diethyl dithiocarbamate as a collector, the relationship between potential and pH range for pyrrhotite flotation is established. At pH 5, the optimal potential range for flotation of monoclinic pyrrhotite is about 125–580 mV (vs SHE), with the maximum flotation occurring at about 350 mV (vs SHE); the optimal potential range for flotation of hexagonal pyrrhotite is 200–580 mV (vs SHE), with the maximum flotation occurring at about 300 mV (vs SHE).     

使用抑制剂甘油基黄原酸钠浮选分离铁闪锌矿与黄铁矿(英文)

研究抑制剂甘油基黄原酸钠(SGX)在铁闪锌矿与黄铁矿浮选分离过程中的作用机理。通过浮选实验考察该抑制剂对硫化矿物的浮选抑制行为。结果表明,用丁黄药作捕收剂,在SGX存在下铁闪锌矿能被Cu2+活化从而具有良好的可浮性,而黄铁矿不能被Cu2+活化;在pH为4-11的范围,SGX的用量小于50mg/L时,可以实现两种矿物的选择性分离。动电位分析表明,SGX在Cu2+存在的条件下不能阻止丁黄药的阴离子在铁闪锌矿表面的吸附,但能阻止丁黄药的阴离子在黄铁矿表面的吸附。吸附等温测试结果表明,SGX在黄铁矿表面的吸附量远比在铁闪锌表面量大。     

浸出-溶剂萃取-电积提铜技术的发展及应用前景

文章阐述了浸出－溶剂萃取－电积提铜技术的发展概况，对其研究成果、生产经验及发展方向进行了归纳与分析，就其在我国的应用前景进行了探讨。     

Recovery of zinc from low-grade zinc oxide ores by solvent extraction

1　INTRODUCTIONZincoxideoresarethemainsourceofzincmetalaf terzincsulfideores .Withtheescalatingdepletionofzincsulfideores,zincoxideoresincludingwillemite(Zn2 SiO4 ) ,hemimorphite[Zn4 (Si2 O7) (OH)·H2 O]andsmithsonite (ZnCO3) ,becameanimportantsourceofzinc[1] .InChina,zincoxideoresarerelativelyabundant,whicharemainlystoredinsouthwestandnorth westChi na,suchasYunnan ,Sichuan ,GuangxiandGansuprovince[2 ] .Manystudieshavebeendoneontheconcentrationofzincoxideores,yettheprogressesaresli…     

浸出—溶剂萃取—电积提铜技术的发展及应用前景

文章阐述了浸出－溶剂萃取－电积提铜技术的发展概况,对其研究成果,生产经验及发展方向进行了归纳与分析,就其在我国的应用前景进行了探讨。     

德光铜矿堆浸厂生产影响因素分析与探讨

本就德兴铜矿堆浸厂抽产以来所存在的问题和困难,结合经往试验研究成果和借鉴国外一些生产经验进行了堆浸各主要影响因素分析,并据此围绕堆浸厂尽快达产达标、做大、做强,提出了相应的一此措施和建议。     

多金属复杂硫化矿的细菌浸出

研究了铅锑锌铁多金属复杂硫化矿原矿的细菌摇瓶和渗滤浸出，摇瓶试验结果表明，10d内锌的浸出率可达到98％以上，渗滤柱浸出60d后锌的浸出率仅为7．30％。利用X-射线衍射和电镜扫描分析了浸出作用的机理。     

低品位氧化锌矿硫酸浸出工艺研究

研究了高硅低品位氧化锌矿的硫酸浸出工艺。在保持矿浆pH=2.0，控制加酸量和加酸速度的条件下，锌的浸出率大于97％，而硅和铁的浸出率只有13％和0．84％甚至更低，每吨锌耗酸1．76t。添加氧化铁硫杆菌浸出，锌的浸出率有所增长，同时利于沉淀除铁，降低浸出液中铁的含量。采用渗滤浸出方案，锌的浸出率大于95％，硅、铁的浸出率只有3．6％和0．6％。     

Electrode process of diethyldithiocarbamate on surface of pyrrhotite

1INTRODUCTION Inthepastdecade,muchprogresshasbeen madeinunderstandingthereactionsofasulfidemineralsurfacewithxanthateagents.Manyelec trochemicaltechniqueshavebeenemployedto studythereactionmechanismofsulfideminerals(suchaspyrite,galenaandchalcopyrite)with xanthatereagents[14].Theseinvestigationsindi catethattheoxidationofboththemineralandthe collectorplaysanimportantroleintheflotationprocess.Itisgenerallybelievedthatthereactions producethehydrophobicparticlesurfacesrequired inflotation.It…