从攀枝花钛选厂丢弃的微细粒级矿泥中回收钛的研究

攀枝花钢铁(集团)公司矿山公司钛选厂是目前我国最大的原生钛铁矿选厂。采用重-浮-电选矿工艺流程从选铁厂磁选尾矿中综合回收原生钛铁矿。由于建厂时的选矿     

微细粒级矿泥合并流失矿浮选试验研究

微细粒级矿泥和流失矿是凡口矿需要回收的铅锌资源,它占选厂资源的1．5％,文章从微细粒矿泥和流失矿的物化特性入手,研究了各自的浮选性能和合并浮选特性。小型试验室试验和工业试验表明微细粒矿泥和流失矿需要合并入选,不仅可以得到最佳的混合精矿品位和回收率,还可以减少药剂用量。     

SLonφ1600mm离心机分选细泥浮选粗精矿的试验研究

对用SLonφ1600mm离心机分选某钨矿细泥浮选精矿做了详细的试验分析,并对离心机的各项指标做了详细的试验数据对比,最终获得离心机给矿品位WO35.087%~15.01%、精矿WO3品位12.94%~20.33%、精矿回收率79.58%~95.2%、富集比1.35~2.54的较好选矿试验结果。使SLon离心机在某钨矿钨细泥回收工艺中得到成功应用。     

浅谈SLon立环脉动高梯度磁选机分选全粒级钛铁矿的试验

阐述了应用SLon磁选机作为攀枝花钢铁公司选钛厂全粒级粗选抛尾设备的选矿试验，结果表明：采用SLon磁选机组成磁－浮－电或磁－浮流程，可以获得精矿品位大于47％、回收率为46．25％－44．58％的流程指标，每年多回收钛精矿50余万t，增加产值25280万元，为该选厂技术改造提供了一条新途径.     

柿竹园白钨低品位矿泥砂分选新工艺试验研究

为研究低品位白钨矿在常温浮选过程中能否产出中度钨精矿产品直接销售,对柿竹园低品位白钨给矿,试验研究了"分级-泥砂分选"浮选新工艺流程。在分级脱泥比例15%的条件下,获得了矿砂样部分产出的精矿WO3品位28.32%,WO3相对回收率78.04%;矿泥样部分产出的精矿品位1.51%,WO3相对回收率40.77%;总综合精矿WO3品位为11.60%,WO3总回收率为71.92%的技术指标,其中产于矿砂精矿即中度钨精矿所占的WO3回收率为66.08%。     

微细粒级钨细泥选矿试验研究

某钨矿主干流程为重选工艺,钨回收率小于63%,约30%的钨矿物损失于原生钨细泥和由于过粉碎产生的次生钨细泥中.为了提高资源利用效率,对该企业重选尾矿中的微细粒级钨细泥资源进行了高梯度磁选、浮选、离心机重选对比试验研究以及＂浮选-离心机重选＂联合流程试验研究.采用＂浮选-离心重选＂联合流程,开路试验获得的钨精矿品位达到32.14%,回收率达到73.51%,试验获得了良好的指标,对微细粒钨细泥的回收具有借鉴意义.     

应用联合工艺综合回收微细粒钨锡物料的试验研究

针对某选厂废弃的钨锡精选溢流进行了选矿试验研究 ,采用振动矿泥摇床与离心机组合粗选,运用重选-浮选 -磁选(水冶)联合工艺流程 ,有效地解决了钨锡细泥综合回收问题。     

回收微细粒级钛铁矿途径的探讨

对攀枝花选钛厂微细粒级物料特性进行了分析，介绍了水封式旋流器浓缩、高梯度磁选抛尾和浮硫浮钛工艺，提出了回收微细粒级钛铁矿的生产流程。     

矿泥对氰化浸出影响的试验研究

矿泥中的粘土矿物易絮凝成网状多孔结构物，能够吸附已溶金，影响金的氰化浸出。为控制矿泥影响，含泥物料可在高碱、高氰条件下进行两浸两洗；从物料中将矿泥分出，进行炭浸，可显著提高金浸出率。     

离心机回收某钨选矿厂尾矿中钨的试验研究

介绍了赣南某钨尾矿的矿石的性质,根据目前钨尾矿回收工艺特点,在细粒级钨尾矿含钨0.23%的情况下,通过"离心选矿+摇床"选矿工艺,可获得品位30.54%、回收率63.74%的钨精矿产品。对黑钨矿山推广使用离心选矿机提高钨回收率具有借鉴意义。     

铅阳极泥湿法处理工艺实践

铅阳极泥是提取金、银等贵金属的重要原料.控制电位在400~450 mV,使铜、锑和铋等贱金属优先于贵金属氧化浸出,贵金属得到富集.采用亚硫酸钠二次分银、甲醛还原银的工艺,得到品位98.86%的粗银,经银电解精炼,可得到99.99%的纯银.采用常温氯化分金、SO2还原得到粗金、粗金二次溶解以及草酸煮沸还原等工艺,得到纯金粉,金粉质量达到国标Au-1的标准.从铅阳极泥至金粉、粗银粉,金、银的直收率分别为95.65%和98.08%.整个工艺设计简短合理,技术指标较为理想.     

电路板铜阳极泥分银渣的还原熔炼研究

采用还原熔炼的方法从电路板铜阳极泥分银渣中回收有价金属,在最佳还原熔炼条件下(温度1150℃、时间30～45min、Na2CO3用量15%、碳粉用量15%、硼砂用量6.0%～10.0%),还原熔炼产出的金属锭和渣分离好,金属产率达到65.2%,铅回收率97.84%,锡回收率88.88%,贵金属回收率均超过95%。     

分选弱磁性矿磁选机的技术进展

论述了分选弱磁性矿物的强磁选机和高梯度磁选机的技术进展 ,其优化了结构、提高了场强 ,取得了较好的应用效果     

顶吹炉处理铅阳极泥的工业试验

应用顶吹炉吹炼铅阳极泥提取阳极泥中有价金属,工艺包括混合料制备、一次还原熔炼、还原捕金、二次吹炼、回收砷锑等工序。经过大量工业试验表明,该工艺方法产出的贵铅含银不低于70.0%,银直收率95%~98%、回收率99.0%~99.7%,工艺具有流程短、渣含贵金属金银量低、处理量大、能耗低等优势。     

Verification of the Soil-Type Specific Correlation between Liquefaction Resistance and Shear-Wave Velocity of Sand by Dynamic Centrifuge Test

Liquefaction of granular soil deposits is one of the major causes of loss resulting from earthquakes. The accuracy of the liquefaction potential assessment at a site affects the safety and economy of an engineering project. Although shear-wave velocity (Vs)-based methods have become prevailing, very few works have addressed the problem of the reliability of various relationships between liquefaction resistance (CRR) and Vs used in practices. In this paper, both cyclic triaxial and dynamic centrifuge model tests were performed on saturated Silica sand No. 8 with Vs measurements using bender elements to investigate the reliability of the CRR-Vs1 correlation previously proposed by the authors. The test results show that the semiempirical CRR-Vs1 curve derived from laboratory liquefaction test of Silica sand No. 8 can accurately classify the (CRR,Vs1) database produced by dynamic centrifuge test of the same sand, while other existing correlations based on various sandy soils will significantly under or overestimate the cyclic resistance of this sand. This study verifies that CRR-Vs1 curve for liquefaction assessment is strongly soil-type dependent, and it is necessary to develop site-specific liquefaction resistance curves from laboratory cyclic tests for engineering practices.     

Preparation of Fine-Grained W-Ni-Fe Alloys by Using W Nanopowders

Metallurgical and Materials Transactions A - The present study utilized W nanopowders (prepared by a two-stage reduction process consisting of steps of carbothermic pre-reduction and hydrogen deep...     

P507萃取分离含镍废水中铬的工艺研究

以电镀废水为原料,P507为萃取剂进行镍铬萃取分离系数的研究.应用串级萃取理论设计镍铬分离工艺及工艺参数,进行了小型串级实验.结果表明通过串级萃取使Ni与Cr(Ⅲ)和Cr(Ⅵ)得到有效的分离,硫酸镍产品中总铬含量小于5×10-6,收率98%以上.     

DSC Model for Soil and Interface Including Liquefaction and Prediction of Centrifuge Test

Realistic predictions of dynamic soil–structure interaction problems require appropriate constitutive models for the characterization of soils and interfaces. This paper presents a unified model based on the disturbed state concept (DSC). The parameters for the models for the Nevada sand, and sand–metal interface are obtained based on available triaxial test data on the sand and interfaces. The predicted stress–strain–pore water pressure behavior for the sand using the DSC model is compared with the test data. In addition, a finite element procedure with the DSC model, based on the generalized Biot’s theory, is used to predict the measured responses for a pile (aluminum) sand foundation problem obtained by using the centrifuge test. The predictions compared very well with measured pore water pressures. The DSC model is used to identify microstructural instability leading to liquefaction. A procedure is proposed to apply the proposed method for analysis and design for dynamic response and liquefaction.     

高纯稀土分离工业性试验基地的建设

高纯稀土分离工业性试验基地建设项目是国家计委批复的国家重点工业性试验项目。目的是针对国内稀土生产中存在的主要技术问题开展研究和工业性试验。本项目建设中采用了针对中钇富铕富镧稀土物料的两步法分离提取荧光级氧化钇和还原萃取提取高纯铕先进工艺，选择高效萃取设备环隙式离心萃取器和振动筛板萃取柱为主体设备，在试验系统中设置了自动控制、在线分析和简单反馈控制系统。本项目已经顺利完成。于１９９４年５月通过了鉴定验收，采用的新技术获得成功。