Acid Leaching Process Nickel

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Acid leaching of nickel sulphide concentrates ScienceDirect

1976. 4. 1. The obvious acid leaching process, viz. digestion with acid to produce H2S and a nickel salt, has not been used at all, simply because the reaction does 362 not go to completion. For example, Kambalda nickel concentrates yield only 10% of their nickel into solution even with prolonged leaching using an excess of mineral acid.

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Nickel-cadmium batteries: effect of electrode phase

However, leaching of the nickel metallic phase was more difficult, requiring higher values of temperature, acid concentration and reaction time (e.g. 85 degrees C, 1.1 M H2SO4 and 5 h, respectively) in order to obtain a good leaching efficiency for anodic and cathodic materials (70% and 93% respectively).

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ACID LEACHING PROCESS FOR TREATING HIGH GRADE

During the first leaching stage of the process, the nickel values present in the matte are preferentially leached by reaction with any copper sulphate present in the spent solution recycled from the electrowinning stage and by the sulphuric acid present in the spent electrolyte and formed during the leaching reaction or added as such to the first leaching stage.

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US6391089B1 Acid leaching of nickel laterite ores for the

An improved process of hydrometallurgical treatment of laterite ores predominantly of the limonitic type for the recovery of nickel and cobalt using sulphuric acid. In order to obtain high...

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The HPAL Process :: Total Materia Article

High-pressure acid leaching (HPAL) is being used for the recovery of nickel from nickel laterite ores, and increasingly atmospheric leaching is also being considered. As mentioned above, major reserves of nickel are contained in laterite ores, which have traditionally been treated by pyrometallurgical methods.

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Selective Nickel Leaching from Nickel and Cobalt Mixed Sulfide

The mechanism of nickel leaching from MS using sulfuric acid was identified. It was shown that nickel-selective leaching using sulfuric acid is difficult because of the formation of elemental sulfur and NiS 2 precipitates on the MS surface that interfere with the leaching reaction. [doi:10.2320/matertrans.M2018080]

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Atmospheric acid leaching of nickel laterites review: Part I.

2008. 3. 1. The operating costs for sulphuric acid leaching processes for nickel laterite ores are strongly impacted by the acid requirements. It is important here to distinguish between acid consumption during leaching and acid utilised which also includes the amount neutralised before nickel

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Selective leaching of nickel from prereduced limonitic laterite

2016. 10. 31. meet during AL process development have been high acid consumption, selective leaching, iron control and acceptable nickel recovery. Generally, under AL conditions, nickel is more difficult to leach from limonite than from smectite (clay) and saprolite ores [3]. To achieve high nickel extraction, often high acid consumption is required, as

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The Direct Nickel Process Total Materia Blog

Using nitric acid as a leaching agent the direct nickel process can treat all types of nickel ore and produces a single flow sheet for a number of final saleable products. As an atmospheric hydrometallurgical process the direct nickel process has an impressive

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NICKEL MATTE CHLORIDE LEACHING

2017. 6. 26. since been extended to nickel, zinc, and gold processing. This latest solution, the Outotec Nickel Matte Chloride Leaching Process, is suitable for nickel refining and is a highly flexible, calcium chloride based processing route for nickel matte and other nickel-containing raw mate-rials. It incorporates two-stage leaching and iron precip-

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