Fine and Coarse Iron Ore Beneficiation – An Evaluation into Global Technologies and Techniques

機譯：粗粗鐵礦選礦—對全球技術的評價

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The mining of iron ore is a high volume low margin business because the value of this commodity isrnsignificantly lower than that of base metals. The main metallurgical challenges in most of the iron orernprojects proposed for treatment nowadays have been in finding the optimum flowsheet for therntreatment of magnetite ores, mixed magnetite-hematite ores and even ores that have banded ironstonernformations (BIF). The associated plant designs incorporate very high capacity milling systems torngrind the ore down prior to magnetic separation and in being highly capital intensive requiresrnsubstantial investment in mega processing plants with associated infrastructure to mill down the runof-rnmine ore to the desired treatment size for upgrading.rnTo minimise the cost of infrastructure, better beneficiation techniques and technologies are beingrnsought to assist in reducing upfront ROM feed to allow for reduction in overall treatment plantrnfootprint necessary in extracting the desired downstream product. This paper discusses suchrnbeneficiation techniques and advancement in technologies for the upgrading of coarse and fine ironrnore utilising dense media separation (DMS), jigging, wet magnetic separation, dry magneticrnseparation, flotation and x-ray processing.rnAnother group of iron ore projects involve the mining of hematite ore below the water table. Often thernmined ore is wet and sticky. This combination requires high capacity processing of feed materialrnutilising large scrubbers or attritioning units to effectively remove the slimes component present in thernfeedstock. The fines removed, usually below 1 mm, are then discarded in large tailings storagernfacilities. Approaches to recovering the saleable material contained within these fines will also berninvestigated in this paper. This not only implies possible reduction in slimes discard footprint, but alsornholds potential benefit in augmenting overall yield and recovery of hematite product.

機譯：鐵礦石的開采是一項大批量，低利潤的業務，因為該商品的價值大大低于賤金屬。如今，大多數提議進行處理的鐵礦項目的主要冶金挑戰是尋找最佳處理流程，以處理磁鐵礦，混合磁鐵礦-赤鐵礦礦石甚至帶鐵礦巖層（BIF）的礦石。相關的工廠設計包括非常高容量的銑削系統，用于在磁選之前將礦石磨碎，并且是高度資本密集型的??需求-對大型加工廠的大量投資以及相關的基礎設施，將純天然的礦石磨碎至所需的處理尺寸以進行升級。為了最大程度地減少基礎架構的成本，人們正在尋求更好的選礦技術和技術，以幫助減少前期ROM進料，從而減少提取所需下游產品所需的總體處理廠占地面積。本文討論了這樣的選礦技術以及利用稠密介質分離（DMS），跳汰，濕磁選，干磁選，浮選和X射線處理技術提純粗鐵礦和精鐵礦的技術進展。另一組鐵礦石項目涉及采礦地下水位以下的赤鐵礦礦石。被開采的礦石通常是濕的且發粘的。這種組合需要利用大型洗滌塔或減磨裝置對原料進行高容量處理，以有效去除原料中存在的煤泥成分。除去的細粉通常在1毫米以下，然后丟棄在大型尾礦存儲設施中。本文還將研究回收這些罰款中所包含的可銷售材料的方法。這不僅意味著可以減少煤泥丟棄物的足跡，而且還具有提高總產量和赤鐵礦產品回收率的潛在優勢。

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來源
《Plant design amp; operating strategies - world's best practice》|2013年|584-598|共15頁
會議地點 Perth(AU)
作者
L M van Niekerk;
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DRA Pacific, PO Box 1283, West Perth WA 6005. Email: lehman.vniekerk@drap.com.au;

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原文格式 PDF
正文語種 eng
中圖分類
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入庫時間 2022-08-26 13:44:17

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Fine and Coarse Iron Ore Beneficiation – An Evaluation into Global Technologies and Techniques

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