金川二矿区贫富矿兼采与贫矿资源综合利用

实现金川集团公司资源控制战略，最大限度地回采矿区范围内的贫矿资源，延长矿山寿命，实现可持续发展，二矿区自2000年起实施了贫富矿兼采与贫矿资源综合利用战略，7年来平均每年采出贫矿量约40余万吨，贫矿回采比例为16．9％～31．3％，本文介绍了二矿区的贫矿资源状况，分析了贫富矿兼采与贫矿资源综合利用的必要性，叙述了战略实施的技术措施与开展情况，阐述了取得的主要效果，为大范围地开采贫矿资源提供了理论依据和技术支持，对同类地质条件矿山资源的开采具有一定的借鉴意义。     

Fc断层以东贫矿首采层回采措施的探讨及实践

Fc断层以东贫矿开采是二矿区“十一五”期间的增产保产措施,通过对Fc断层以东贫矿的首采层回采,积累了一定的无假顶采矿经验;该工程地质条件复杂,岩石软弱破碎,地压大,处于不良岩层中,通过实践研究,取得了适合Fc断层以东贫矿开采有利的支护形式;通过探采结合,获得了第一手地质资料,矿体地质界线发生了一定的变化。工艺技术和无假顶支护技术的研究,为首采层安全、高效、快速回采提供技术支撑。     

金川镍贫矿资源综合利用的意义

介绍了金川矿区镍贫矿资源开发利用及矿山生产的基本情况，并着重对金川矿区贫矿资源开发利用的意义做了详细论述。     

Fc断层以东贫矿开采的技术改造与工艺优化

二矿区是金川集团公司的主力矿山,自产矿石原料的三分之二来源于此,随着公司经济总量不断做大及二矿区企业管理水平的深入提高,年出矿能力逐年攀升,即使如此仍很难满足公司日益增长的矿石原料需要。加大Fc断层贫矿资源的综合利用以成为促进企业发展和提高经济效益的重要途径,同时有利于缓解采掘矛盾突出的问题。     

用原地溶浸采矿回收西部贫矿资源的关键技术研究

针对西部矿床开采中贫矿多、采深增加及环保要求高等特点 ,提出了采用原地破碎溶浸采矿技术来开采西部贫矿资源的思路。同时 ,就这一思路涉及到的诸如合理采准布置、爆破致裂与破碎、溶浸液流动规律等关键技术问题进行了讨论。     

二矿区Fc断层以东1100水平以下贫矿开采方法与措施

本文通过对二矿区Fc断层以东1100水平以下贫矿目前现状的分析，分别从采矿方法选择、盘区划分、采准工程布置、进路回采、充填工艺、提高回采强度等方面，提出了开采的方法与措施，这将大大提高二矿区年产量，弥补产量的不足，该矿体的回采，对提高公司经济效益具有积极意义。     

金钼集团资源节约型企业的典范

金钼集团在长期的生产资源开发利用中，始终坚持“在开发中保护，在保护中开发”的原则，在开发利用主矿产钼的同时，非常重视伴生矿产资源的综合回收，先后建成了利用钼选矿尾矿选硫精矿、铜精矿和铁精矿生产线。在资源开采过程中，注重贫矿搭配利用，仅2005年消化贫矿近300万t，提高了开采回采率，增加了矿石储备，延长了矿山寿命，为企业后续发展奠定了坚实的资源基础。     

延长把关河石灰石矿寿命的途径

提出了处长把关河石灰石矿寿命的途径，扩大采场西部开采境界，个性采场东部的境界，以增加可以采矿量；充分利用采区境界内外资源；生产、收购采区外的优质石灰石。探讨了未来开采滑体的可能性。介绍了新矿点选择的结果。     

国内铁矿石的特点

我国幅员辽阔，铁矿资源丰富，分布广泛，呈现以下特点： a．矿石储量大，品位低，贫矿多。按铁矿资源储量，我国居世界第五位。     

金信钼业北沟采区1号矿脉开采技术研究

北沟采区范围内1号矿脉为主矿体,保有储量260万t,平均品位0.34%,钼矿平均厚度为3~6 m,围岩陷落角上、下盘均为65°。为充分回收利用国家宝贵的矿石资源,积极增加企业的经济效益,本文针对北沟采区1号矿脉资源特点,研究制定了资源开采工程技术方案,并详细进行了技术论证和经济分析,以确保该部分矿产资源能安全高效地获得回收。     

中国含银锰矿资源分布及属性研究

含银锰矿是银矿中的重要资源类型之一,按锰属性分为氧化型、硫化型、碳酸盐型（菱型）、氢氧化型,氧化锰型是目前探明的主要含银类型;银同锰共生关系密切,采用选矿工艺一般只能得到银锰混合精矿;按中国区域和省份划分,介绍了中国主要含银锰矿资源分布及重点矿区资源特性,研究内容对中国合银锰矿资源开发具有指导意义。     

Selective reduction of metals in the lattice of a complex oxide

The results of our experiments on the carbon reduction of metals from iron-containing rich and lean monometallic ores and complex ores in which iron is present along with other metal oxides in a common crystal lattice are analyzed. It is concluded that reduction should be considered as an electrochemical process consisting in the supply of electrons to the cations to be reduced. The source of electrons in the experiments is a chemical reaction on the surface of interaction between a reducer and oxides. Electron transport deep into ore lumps is performed by anion vacancies. Vacancies draw cations with a high electron affinity and neutral atoms, which ensures selective metal reduction. A continuous metallic shell does not form on the surface of lean and complex ores, and oxide layers, along which vacancies move into an ore lump, are retained. As a result, the entire ore lump undergoes reduction. Therefore, lean and complex ores can easily be reduced as compared to rich ores.     

Selective reduction of metals in the crystal lattice of complex oxides: Physical principles

With declining reserves of rich iron ores, the processing of lean and complex ore is a priority. Such ore may only be used in the blast furnace in limited quantities. A method is developed for the selective reduction and extraction of metals from the oxide lattice in lean and complex ores, without melting. The transfer of charge and mass through lattice defects is analyzed. The reduction of cations is found to involve the addition of electrons associated with anionic vacancies. Vacancies and excess electrons are formed when oxygen anions are removed from the lattice by chemical reaction with the reducing agent.     

Processing High-Grade Concentrates from Challenging Low-Grade Iron Ore Deposits

On an average global basis, iron ores tend to decrease in Fe grade over time. With the exception for some deposits that are logistically challenged, iron ore resources in more accessible areas may often have processing issues, especially if high-grade concentrates are desired. This paper addresses some of these with examples on how technological developments enhanced the feasibility to exploit such ores. The emphasis is on comminution, magnetic separation and flotation.     

湖南花垣-古丈锰矿床地质特征及找矿方向

针对湖南花垣—古丈锰矿床地质特征，结合区域锰矿地质背景、矿床成因、成矿地质条件和控矿因素，初步提出了找矿标志及找矿方向。     

削壁式充填采矿法在大柳行金矿的试验研究及应用

削壁式充填采矿法在开采急倾斜极薄矿脉时可显著降低采矿贫化损失,实现矿岩分采。针对大柳行金矿采用浅孔留矿采矿法开采存在的问题,结合矿区工程实际情况,开展了削壁式充填采矿法的试验研究及应用。根据源口新井矿区生产实际得出矿区矿块的生产能力达45 t/d,矿石贫化率由原15%降低为10%,采矿损失率由原16%降低至11%,矿区经济效益显著。     

A review of the beneficiation of low-grade manganese ores by magnetic separation

ABSTRACT

Magnetic separation is an effective strategy for the upgrading of a variety of lean ores, including the beneficiation of low-grade manganese ores. This work reviews 24 studies on the magnetic separation of manganese ores; 6 of these studies report both a sufficiently high Mn grade (>44% Mn) and Mn/Fe ratio (>7.5) in the concentrate as to be suitable for use as high-grade feed materials in the production of ferromanganese. Of these 24 studies, the most efficient separation and enrichment was generally achieved by the reduction roasting of the ore prior to magnetic separation, rather than the direct separation of the ore. In both cases there was sufficient evidence for correlation, depending on the mineralogy, between the Mn and Fe grades of the ore and the final concentrate grade and Mn/Fe ratio. To yield a concentrate suitable for use in ferromanganese production, it is recommended that the ore contain a minimum initial concentration of ～25% Mn and ～10% Fe.     

化学选矿技术在低品位矿石处理中的应用

化学选矿技术是利用不同矿物质之间化学性质的差异,通过化学反应消融原矿石进而从原矿材料中提取所需元素的采矿手段.相较于传统的物理选矿技术,化学选矿技术在贫矿、细矿以及杂矿等分选难度较大的矿物质分离领域中具有较为显著的高效率优势.为了进一步提高化学选矿技术的应用效果,推动化学选矿技术在我国采矿产业中的应用,介绍了当前阶段化...     

锰矿粉利用技术研究

系统地分析了当前锰矿资源及利用状况，并提出了一种利用贫锰矿粉的新工艺——微波加热含碳锰矿球团制备海绵锰（铁）。对可持续利用我国大量贫锰矿资源具有重要意义。     

用倒推方法计算河台金矿级差品位

由于存窿出矿截止品位实质是级差品位的特例,因而在采矿成本、开采贫化率、掘进成本已知的条件下,可以求得备采矿量的级差品位及某个开采阶段矿块的级差品位,当矿块的地质品位不小于级差品位时,该矿块就有开采价值．为了确保矿山的利润水平,选择在黄金价格较高时适当扩大生产规模处理表外矿．