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saprolite iron ore process

saprolite iron ore process

Saprolite - an overview | ScienceDirect Topics

A: the saprolite frequently displays grayish colors. Weathered quartz veins in the saprolite are accompanied by red to orange iron oxides, the so-called Hunsrück ore, because the quartz veins were better aerated than the dense, loamy saprolite around them.

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Development of a Low-Temperature Bloomery Process for ...

2020-3-31 · We studied samples of the saprolite ore from Indonesia (Sulawesi island) and the ore from the Buruktal deposit (Russia, Orenburg region). Table 1 gives the chemical compositions of the ore samples. The ores are high-magnesia: the mass ratio MgO/SiO 2 is 0.52 (Indonesia ore) and 0.65 (Buruktal ore). The Buruktal deposit ore is characterized by a very low nickel content (0.77%) and the

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Nickel production from low-iron laterite ores: Process ...

The concentrate with 10.28% of nickel grade and 66,57% of iron grade was produced from reduced ore at temperature 1000 ºC for 1 hour, 10 % of coal addition and 20% of Na 2 SO 4 addition with ...

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A Study on Classification of Limonite and Saprolite from ...

2021-10-21 · As is well known, the process of direct reduction and magnetic separation is effective route to deal with low-grade saprolite laterite, but generally limited by the reduction of nickel (iron ...

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Atmospheric acid leaching of nickel laterites review: Part ...

2008-3-1 · Saprolite ore can then be used for neutralisation of the product liquor and precipitation of iron. Perhaps the best known example of two-stage leaching is the AMAX (or AMAX-COFREMMI) process patented by Chou et al. (1978) and described at subsequent international meetings ( e.g. Duyvesteyn et

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[PDF] A Study on Classification of Limonite and Saprolite ...

Nickel laterite ore is classified into two principal ore types: saprolite (silicate ore) and limonite (oxide ore). Saprolite-type ore characterized by high magnesia and silica contents is treated by pyrometallurgy process. On the other hand, limonite-type ore is subjected to hydrometallurgy process to produce nickel products. Hydrometallurgy process requires that a raw material to meet the ...

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FERRONICKEL PRODUCTION AND OPERATION

2015-2-27 · Between the saprolite and limonite layer there is usually a magnesium rich transition layer (10-20% Mg) with iron which is called serpentine ... This process can be applied to high iron limonitic ores and tolerates more Mg than other acid ... The mixture, containing 30% reductant and 100 g ore, was smelted in different process durations varying ...

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Nickel Laterites in SE Asia - CSA Global

2019-7-30 · ore Bedrock Bedrock Saprolite (Serpentine, chlorite, smectite) Smectite zone Ferruginous zone Colluvium Bedrock Saprolite ... • Ore composition (Mg, Al) CARON PROCESS • Energy (dry and roast) • Capital cost of front end ... Ni pig iron • Well proven low risk technology

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US20110083533A1 - Saprolite Neutralisation of Heap

A heap leach process for the recovery of nickel and/or cobalt from a laterite ore, said process including the steps of: a) providing one or more heaps of a nickeliferous laterite ore; b) leaching the ore in a heap leach step by applying acid to one or more heaps to provide a pregnant leach solution; c) neutralising the pregnant leach solution with ground saprolite ore; and d) recovering the ...

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(PDF) Study effect of Na2SO4 dosage and graphite on the ...

2021-8-10 · The selective reduction process is the process to separate nickel and iron on limonite with the combination of magnetic separation. ... limonite and saprolite ore will be selectively reduced using ...

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High-efficiency leaching of valuable metals from saprolite ...

2021-1-1 · With the concentration of iron ions increasing from 60 to 160 g·L −1, the leaching efficiency for Fe from saprolite laterite ore slightly decreases from 95.5% to 92.5% while the R Fe/M value increases from 1.88 to 4.32, implying that high-efficiency leaching of valuable metals and the leach solutions with various R Fe/M values could be both ...

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A Study on Classification of Limonite and Saprolite from ...

2021-10-21 · As is well known, the process of direct reduction and magnetic separation is effective route to deal with low-grade saprolite laterite, but generally limited by the reduction of nickel (iron ...

Read More
[PDF] A Study on Classification of Limonite and Saprolite ...

Nickel laterite ore is classified into two principal ore types: saprolite (silicate ore) and limonite (oxide ore). Saprolite-type ore characterized by high magnesia and silica contents is treated by pyrometallurgy process. On the other hand, limonite-type ore is subjected to hydrometallurgy process to produce nickel products. Hydrometallurgy process requires that a raw material to meet the ...

Read More
Investigation of the reduction roasting of saprolite ores ...

Laboratory studies have been undertaken to determine the mechanisms and kinetics of reactions occurring during the reduction roasting of saprolite ores with 1 wt% elemental sulphur addition.

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Atmospheric acid leaching of nickel laterites review: Part ...

2008-3-1 · Saprolite ore can then be used for neutralisation of the product liquor and precipitation of iron. Perhaps the best known example of two-stage leaching is the AMAX (or AMAX-COFREMMI) process patented by Chou et al. (1978) and described at subsequent international meetings ( e.g. Duyvesteyn et

Read More
Atmospheric leach process for the recovery of nickel and ...

Leaching of the saprolite fraction is carried out at high temperature (150°-250° C.) and pressure for effective iron and aluminum rejection, but with relatively low nickel extraction from the saprolite ore. In another process, U.S. Pat. No. 4,097,575 teaches saprolite ore roasting at 500°-750° C. under oxidizing conditions to increase its ...

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Atmospheric leach process for the recovery of nickel and ...

The process of claim 27, wherein the saprolite ore is pulped in seawater that provides a source of the iron precipitating agents. 31. The process of claim 27, wherein at least a portion of the jarosite compound is added to the leach slurry prior to addition of the saprolite to serve as a seeding surface to enhance precipitation of iron as jarosite.

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Extraction and separation flowchart of the saprolite ...

The extraction and separation flowchart of the saprolite laterite ore is presented in Fig. 2. All the experiments were conducted in duplicate to assure that the whole procedure was accurate.

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Nickel Laterites in SE Asia - CSA Global

2019-7-30 · ore Bedrock Bedrock Saprolite (Serpentine, chlorite, smectite) Smectite zone Ferruginous zone Colluvium Bedrock Saprolite ... • Ore composition (Mg, Al) CARON PROCESS • Energy (dry and roast) • Capital cost of front end ... Ni pig iron • Well proven low risk technology

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A Study on Classification of Limonite and Saprolite from ...

2021-10-21 · As is well known, the process of direct reduction and magnetic separation is effective route to deal with low-grade saprolite laterite, but generally limited by the reduction of nickel (iron ...

Read More
Investigation of the reduction roasting of saprolite ores ...

Laboratory studies have been undertaken to determine the mechanisms and kinetics of reactions occurring during the reduction roasting of saprolite ores with 1 wt% elemental sulphur addition.

Read More
Atmospheric leach process for the recovery of nickel and ...

The process of claim 27, wherein the saprolite ore is pulped in seawater that provides a source of the iron precipitating agents. 31. The process of claim 27, wherein at least a portion of the jarosite compound is added to the leach slurry prior to addition of the saprolite to serve as a seeding surface to enhance precipitation of iron as jarosite.

Read More
Atmospheric leach process for the recovery of nickel and ...

Leaching of the saprolite fraction is carried out at high temperature (150°-250° C.) and pressure for effective iron and aluminum rejection, but with relatively low nickel extraction from the saprolite ore. In another process, U.S. Pat. No. 4,097,575 teaches saprolite ore roasting at 500°-750° C. under oxidizing conditions to increase its ...

Read More
Improved beneficiation of nickel and iron from a low

2020-1-11 · As is well known, the process of direct reduction and magnetic separation is effective route to deal with low-grade saprolite laterite, but generally limited by the reduction of nickel (iron)-bearing minerals and growth of Fe-Ni alloy particles in the reduction ...

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Nickel Laterites in SE Asia - CSA Global

2019-7-30 · ore Bedrock Bedrock Saprolite (Serpentine, chlorite, smectite) Smectite zone Ferruginous zone Colluvium Bedrock Saprolite ... • Ore composition (Mg, Al) CARON PROCESS • Energy (dry and roast) • Capital cost of front end ... Ni pig iron • Well proven low risk technology

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Laterite-saprolite Au - USGS

DESCRIPTIVE MODEL OF LATERITE-SAPROLITE Au By Gregory E. McKelvey BRIEF DESCRIPTION SYNONYM: Eluvial gold placers (Boyle, 1979), Au-bearing saprolite (Becker, 1895). DESCRIPTION: Au disseminated in laterite and saprolite that

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(PDF) Economic Geology - Supergene ore deposits

2021-11-16 · Lateritic iron ore deposits are not an. ... garnierite-saprolite horizon) ... process is of economic significance. The oxidation of sulphur and iron in one.

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Nickel Processes | PDF | Nickel | Smelting

2020-7-13 · Caron process could be used for limonitic ores or a mixture of limonite and saprolite The process can tolerate a higher amount of Mg in the feed than the PAL processes Examples: Nicaro, Punta Gorda, Yabulu, Nonoc (Closed) Process Description and Examples PAL Processes. PAL. processes use ore that: are. predominantly limonitic, or nontronitic in

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Iron and Steel Manufacturing - IFC

Iron and Steel Manufacturing Industry Description and Practices Steel is manufactured by the chemical reduction of iron ore, using an integrated steel manufac-turing process or a direct reduction process. In the conventional integrated steel manufacturing process, the iron from the blast furnace is con-verted to steel in a basic oxygen furnace ...

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