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Performance Enhancing Blends – Concentrator Feed Blending at Iron Magnet

机译：增强性能的混合物–铁磁铁厂的浓缩饲料混合

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摘要

Magnetite ore blending has yielded signifi cant performance improvements in OneSteel's magnetiternconcentrator. The magnetite concentrator benefi ciates magnetite ore from the Iron Magnet Depositrnand produces concentrate, which is pelletised, then fed to the OneSteel Whyalla blast furnace.rnConcentrator feed variability severely detracts from the concentrator's performance, affecting bothrnconcentrate yield and grade, which impacts on all downstream processing costs.rnA coordinated approach has integrated mine planning, geological modelling and grade control,rnto minimise concentrator feed variability, through effective ore blending throughout the miningrnand stockpiling process.rnMine planning personnel design shots that extend the full width of the orebody and hencernacross the stratigraphic profi le. Based on geological information contained in block-outs and inrnconsultation with Geology, the Grade Control team allocates material to each primary stockpile,rnpotentially from every stratigraphic domane in the orebody. This ensures primary stockpiles arerndesigned with maximum practical homogeneity and consistency.rnUsing only primary movement, the allocated ore is stockpiled in a layer-cake fashion. The ore isrnpimple dumped across the width of the stockpile footprint and on completion of a layer, it is dozedrnfl at with an access ramp that allows dumping to commence on the next lift. The primary stockpilesrnare reclaimed normal to build direction and the magnetite is crushed, all in, to a concentrator feedrnstockpile.rnThe ore is sampled at the crusher from a falling stream cut. These assay data, are used forrnbenchmarking and control charting the grade and variability of concentrator feed stockpiles. Thernconcentrator feed stockpiles have demonstrated a statistically signifi cant reduction of within pilernvariation, between pile variation and pile to pile variation, primarily attributable to the developmentrnof ore blending. The concentrator has seen sustained, improved performance as a direct result,rnwhich translates into lower concentrate cost per tonne and improved yield and quality.
机译：磁铁矿混合在OneSteel的磁选浓缩器中显着提高了性能。磁铁矿选矿厂从铁磁铁矿中选出磁铁矿，然后生产精矿，然后将其制成球团，然后送入OneSteel Whyalla高炉。rn选矿厂的进料波动严重降低了选矿厂的性能，影响精矿的产量和品位，这影响了所有下游加工成本.rn一种协调的方法将矿山计划，地质建模和品位控制相结合，通过在整个采矿和堆存过程中进行有效的矿石混合来最大程度地降低选矿厂的进料变化.rn矿山规划人员设计了可扩展矿体和整个岩层宽度的炮弹。乐基于封锁和地质咨询中包含的地质信息，坡度控制小组有可能从矿体中的每个地层区向每个主要库存分配材料。这样可确保以最大的实际同质性和一致性来设计初级库存。仅使用初级运动，以层状蛋糕的形式存储分配的矿石。 Ispimple矿石在堆放区的整个宽度上倾倒，并在完成一层堆放后，通过一个入口坡道进行堆放，允许在下一个升降机上开始倾倒。最初的堆料被回收到正常的构造方向，并且磁铁矿全部被粉碎到选矿厂的原料堆中。矿石从破碎机的下降流中取样。这些测定数据可用于基准分析和对照图，其可用于选矿厂饲料库存的等级和变异性。选矿厂的进料堆在堆内变化和堆间变化之间显示出堆内变化在统计上的显着减少，这主要归因于发育矿的混合。该选矿厂直接看到了持续，改进的性能，从而降低了每吨选矿厂的成本，提高了产量和质量。

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  • 来源
    《Iron ore 2011》|2011年|p.173-178|共6页
  • 会议地点 Perth(AU)
  • 作者

    M Darvall;

  • 作者单位

    OneSteel, GPO Box 21, Whyalla SA 5600. Email: DarvallM@onesteel.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

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