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- W2247264980 abstract "Despite technological simplicity and economic viability of heap leaching method, its application for nickel (Ni) exploitation from Australia's complex, low grade Ni laterite ores is limited. This is mainly due to difficulty of forming a heap with desirable porosity, permeability and long-term geotechnical stability. Agglomeration of fine particles into coarse granules can be conducive to enhanced heap leaching operation only if the agglomerates are structurally strong enough to withstand heap leaching conditions (i.e., not to easily break up under compressive load or disintegrate upon contact with lixiviant). In the present paper, two different approaches including (i) addition of coarse (2-15 mm) particles into the -2 mm feed ore, and (ii) using geopolymeric binders (sodium silicate solution and sodium aluminate powder), are used to investigate improving the structural strength and stability of siliceous goethitic Ni laterite agglomerates. The results indicated that the addition of competent coarse particles (e.g., goethite and quartz) in the feed ore leads to noticeably higher agglomerate structural strength and hence, may enhance bed stability. In contrast, addition of 5 - 60 kg of both geopolymers per t of dry ore had no effect on agglomerate strength and stability." @default.
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- W2247264980 date "2012-01-01" @default.
- W2247264980 modified "2023-09-23" @default.
- W2247264980 title "Improving nickel laterite agglomerate strength for enhanced heap leaching" @default.
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