• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Iron ore 2011 >New Ore Types from the Cauê Banded Iron Formation, Quadrilátero Ferrífero, Minas Gerais, Brazil – Responses to the Growing Demand
【24h】

New Ore Types from the Cauê Banded Iron Formation, Quadrilátero Ferrífero, Minas Gerais, Brazil – Responses to the Growing Demand

机译：巴西米纳斯吉拉斯州QuadriláteroFerríferoCauê带状铁矿的新矿石类型–应对不断增长的需求

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The mining district of the Quadrilátero Ferrífero (QF) in southeastern Brazil contributes torn70 per cent of the Brazilian iron ore production, which reached 370 Mt in 2010. Traditionally, fourrniron ore types were mined in the QF region:rn1. soft haematite,rn2. hard haematite,rn3. friable 'itabirite' (the Brazilian name for metamorphosed banded iron formation), andrn4. canga (an indurated iron-rich crust).rnWith the exception of the hard haematite, these categories derive from supergene enrichment ofrnthe Paleoproterozoic Cauê Itabirite. High current iron ore demand means that the QF high gradernsupergene ores will be depleted in a few decades. Consequently, several mining projects are beingrndeveloped to exploit unenriched, fresh itabirite. Among them, the Minera??o Usiminas Serra Azulrnproject in northwestern QF is one of the most advanced. Four major itabirite types occur in thernQF region:rn1. siliceous (or standard),rn2. dolomitic,rn3. amphibolitic, andrn4. magnetitic.rnThe dominant type in Serra Azul region is a fresh siliceous itabirite, composed essentially ofrnhaematite, martite and quartz that averages 36 per cent Fe (51.5 per cent Fe2O3) and 47 per centrnSiO2. The second type, the magnetitic itabirite, consisting of magnetite, martite, gruneritecummingtonite,rnquartz, dolomite, stilpnomelane, and subordinate haematite, is typically arnstrongly magnetic greenish banded iron formation with the iron grade varying between 25 andrn35 per cent. Chemically, it differs from the siliceous itabirite due to the relatively high CaO, MgOrnand, consequently, high LOI contents. Together with supergene ores, fresh itabirites have beenrnincluded in the ore reserves of the Serra Azul project. We anticipate that all the four types of freshrnitabirite will be incorporated as ore in the QF region, causing a huge increase on the iron orernresources of the district, and representing enormous environmental and technological challengesrnfor the local iron ore industry.
机译：巴西东南部的QuadriláteroFerrífero（QF）矿区贡献了70％的巴西铁矿石产量，2010年达到370Mt。传统上，在QF地区开采的铁矿石类型为rn1。软赤铁矿，rn2。硬赤铁矿，rn3。易碎的“ itabirite”（变形带状铁形成的巴西名称）和rn4。 canga（一种坚硬的富铁结壳）。除硬赤铁矿外，这些类别均来自古元古代CauêItabirite的超基因富集。当前高铁矿石需求意味着QF高品位超原矿将在几十年内枯竭。因此，正在开发几个采矿项目，以开发未富集的新鲜伊比特岩。其中，QF西北部的Minera ?? o Usiminas Serra Azulrn项目是最先进的项目之一。在QF区域中出现四种主要的依钛铁矿类型：rn1。硅质（或标准），rn2。白云岩，rn3。两性的，andrn4。磁铁矿。塞拉阿祖尔（Serra Azul）地区的主要类型是新鲜的硅质辉石，主要由赤铁矿，镁铁矿和石英组成，平均含铁36％（Fe2O3为51.5％）和SiO2为47％。第二种类型的磁铁矿黄铁矿，由磁铁矿，马氏体，菱锰矿，菱锰矿，白云石，三聚氰胺和次要赤铁矿组成，通常呈强磁性带绿色带状铁，铁品位介于25％至35％之间。从化学上讲，它与硅质钛铁矿的区别在于CaO，MgOrnand相对较高，因此LOI含量较高。 Serra Azul项目的矿石储量中已将新鲜的伊比特岩与超原矿一起包括在内。我们预计所有四种类型的新鲜三菱铁矿都将在QF地区作为矿石掺入，这将导致该地区的铁矿石资源大量增加，并给当地铁矿石行业带来巨大的环境和技术挑战。

著录项

  • 来源
    《Iron ore 2011》|2011年|p.59-71|共13页
  • 会议地点 Perth(AU)
  • 作者

    L Q Amorim; F F Alkmim;

  • 作者单位

    Mine Planning and Environment, Minera??o Usiminas Ltda, Rua Professor José Vieira de Mendon?a, 3011, bairro Engenho Nogueira, Belo Horizonte, Minas Gerais, 31310-260, Brazil. Email: leandro.amorim@usiminas.com;

    Escola de Minas, Universidade Federal de Ouro Preto, Departamento de Geologia, Morro do Cruzeiro, Ouro Preto Minas Gerais 35.400-000, Brazil. Email: ff alkmim@gmail.com;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 铁矿石;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号