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Dry processing of magnetic iron ores - addressing cost and environmental issues

机译：磁铁矿石干燥加工 - 解决成本和环境问题

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The iron ore industry has reached the end of an unprecedented period of expansion triggered by China's demand for iron ore. Lower ore prices have led producers to focus on optimising mining operations while extracting the maximum tonnage from the infrastructure presently in place or from projects already underway. A rising global surplus is expected to further force ore prices down and lead to output curtailments, which in turn will help to restore market balance. However, investment in the development of new resources and the development of new infrastructure will inevitably become necessary. Making the right decisions in relation to future processing infrastructure in a climate of uncertain demand and price volatility will not be as straightforward as in the past, where expanding the scale of a proposed operation has been the answer to ensuring economic viability. Overall cost and environmental pressures particularly in relation to wet processing will dominate the decision-making process. IMP Technologies (IMPTEC) has anticipated the need for a dry low cost processing alternative, which can open the way for the development of lower grade magnetite deposits and ensure the sustainability of processing in Australia. The lower grade magnetite deposits are generally fine grained and require grinding to p_(80) of 30 to 40 microns. Historically, the cost of grinding to these sizes has been and remains a key factor determining the economic viability of a magnetite processing operation. The IMPTEC Super-fine Crusher and Cyclomag Separator are the key components of a proposed radically simplified dry processing alternative, which addresses both cost and environmental issues. This paper reports on the results of pilot super-fine crushing and cyclomag separation test work, focused on supporting the feasibility of the proposed dry processing route for the production of high-grade pellet plant feed from fine grained low-grade magnetic ores.
机译：铁矿石行业已达到了中国对铁矿石的需求引发的前所未有的扩张期结束。较低的矿石价格有LED生产商专注于优化采矿业务，同时提取目前从基础设施的基础设施或已经开始的项目的最大吨位。预计全球盈余的上涨将进一步迫使矿石价格下跌并导致产出削减，这反过来有助于恢复市场余额。但是，对新资源的发展和新基础设施的发展将不可避免地成为必要的。在不确定的需求和价格波动的气氛中，使未来加工基础设施有关的正确决策并不像过去那样直截了当，在那里扩大拟议行动的规模一直是确保经济可行性的答案。整体成本和环境压力尤其与湿法处理有关将主导决策过程。 IMP技术（IMPTEC）预计需要干燥的低成本处理替代品，这可以为较低级磁铁矿沉积物开辟道路，并确保在澳大利亚的加工可持续性。较低级磁铁矿沉积物通常细粒粒度，并且需要研磨30至40微米的P_（80）。从历史上看，磨削这些尺寸的成本已经是确定磁铁矿加工操作的经济可行性的关键因素。 IMPTEC超细破碎机和环磁销分离器是所提出的基本简化的干燥处理替代方案的关键部件，其解决了成本和环境问题。本文报告了试点超细压碎和环磁分离试验工作的结果，重点是支持所提出的干燥加工途径的可行性，从细粒粒度低级磁性矿石生产高档颗粒植物饲料。

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