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Occurrence and Mineralogical Association of Phosphorus in Australian Bedded Iron Ore Deposits

机译：澳大利亚层状铁矿床磷的赋存与矿物学协会

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摘要

The various mechanisms by which phosphorus (P) occurs and is distributed within bandedrniron formations (BIF)-derived iron ore are examined. In unenriched, precursor BIF P occursrnpredominantly as discrete grains of primary apatite. In high-grade ores hosted mainly by thernBrockman Iron Formation, P occurs in three main forms:rn1. as secondary apatite;rn2. other submicron, P-rich phases (eg Rare earth containing minerals (REE), vivianite, strengite,rnwavellite) present in pore networks; andrn3. as P occurring with iron oxides, in particular, goethite.rnHowever, the presence of secondary P-bearing phases does not contribute signifi cantly to therntotal P level in iron ore, and it is P associated mainly with goethite, which represents the mostrncommon occurrence of P in these ores.rnNo direct evidence for the replacement of Fe by P within the structure of synthetic goethiternhas been demonstrated. Therefore, it is most likely that in iron ores P associates with goethiternin occluded form as adsorbed PO_4~(3-)species or as discrete P-bearing minerals, such as strengite,rnwavellite or vivianite, in ultra-fi ne, micro-pores or within intra-domain regions of multi-domainicrngoethite. Such occluded P is not easily extracted with commonly used lixiviants, such as weaklyrnalkaline leachates. Recent development of a low temperature-alkalie/water leach extractionrnmethod has been successful in reducing not only the P content, but also amounts of Si and Al inrnthe initial ore. Refi nement of such a method to commercial application will have enormous benefi trnin realising the economic potential of large tonnages of high-P (ie >0.07 wt per cent P) bearingrniron ore.
机译：研究了磷（P）发生并在带铁生成物（BIF）衍生的铁矿石中分布的各种机制。在未富集的情况下，前体BIF P主要以原生磷灰石的离散颗粒形式出现。在主要由rn布罗克曼铁矿形成的高品位矿石中，磷主要以三种形式存在：rn1。作为次生磷灰石; rn2。孔隙网络中存在的其他亚微米，富含P的相（例如，含稀土元素的矿物（REE），堇青石，硬质合金，菱沸石）； Andrn3。因为P与氧化铁特别是针铁矿一起出现。然而，次生P含相的存在对铁矿石总P含量没有显着贡献，并且P主要与针铁矿有关，这代表了最常见的针铁矿发生。这些矿石中的P。没有证据表明合成Goethitern的结构中有用P替代Fe的直接证据。因此，在铁矿中，磷极可能以超细微孔中的吸附PO_4〜（3-）物种或离散的含磷矿物质（如硬石，菱铁矿或堇青石）的形式与邻苯二异氰酸酯结合在一起。或在多域菱铁矿的域内区域内。此类封堵的磷不易用常用的毒液如弱碱性渗滤液提取。低温碱/水浸提方法的最新发展不仅在降低原矿中的P含量，而且还降低了Si和Al的含量方面取得了成功。实现这种方法的商业化应用将带来巨大的好处，实现大吨位高磷（即P> 0.07％重量百分比）含铁矿石的经济潜力。

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  • 来源
    《Iron ore 2011》|2011年|p.331-336|共6页
  • 会议地点 Perth(AU)
  • 作者

    M A Wells; E R Ramanaidou;

  • 作者单位

    CSIRO Earth Science and Resource Engineering (CESRE), 26 Dick Perry Avenue, Kensington WA 6151. Email: martin.wells@csiro.au;

    Research Stream Leader Carbon Steel Materials, CSIRO Earth Science and Resource Engineering (CESRE), 26 Dick Perry Avenue, Kensington WA 6151. Email: erick.ramanaidou@csiro.au;

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  • 正文语种 eng
  • 中图分类 铁矿石;
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