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

A process for the recovery of nickel and/or cobalt from a lateritic ore by heap leaching, the process including the steps of : a) forming one or more heaps from a lateritic ore body wherein that lateritic ore body includes a blend of both limonitic and saprolitic type ores; b) leaching the one or more heaps with a leach solution; and c) recovering the nickel and/or cobalt from the resultant

Jan 01, 2021 Saprolite has higher basicity than limonite. The difference between magnesium and silicon oxide in lateritic nickel ore plays an important role in the selective reduction process. Therefore, in this work, the selective reduction of saprolite and limonite was carried out to reveal the effect of lateritic nickel ore basicity (MgO/SiO 2 ratio) on

Jun 12, 2014 The saprolite and limonite zones tend to contain the higher grades of Ni and can range from 1.5-3% and 1.2-1.7% respectively. How do they form? Many factors affect the formation of nickel laterites, including the original rock the soil develops from, the climate, the rate in which weathering occurs, drainage of groundwater and the tectonic setting

Limonite type laterites (or oxide type) are highly enriched in iron due to very strong leaching of magnesium and silica. They consist largely of goethite and contain 1-2% nickel incorporated in goethite. Absence of the limonite zone in the ore deposits is due to erosion. Silicate type (or saprolite type) nickel ore formed beneath the limonite

Our mid-grade saprolite ore were sold to Japanese and Chinese clients. Our Chinese clients use the material as feed for electric furnaces for production of high and medium- grade NPI. We sell two types of limonite ore: high-iron, and low- grade. High-iron limonite ore has a nickel content of less than 1.0% and an iron content of 48 to 50%

Saprolite usually reaches down to more than 50 m in humid areas on crystalline rocks, where they form an important part of the regolith. Due to long-term weathering under stable tropical conditions, most present-day humid tropical soils developed from deeply weathered saprolites rather than from the parent rock, and their physical and chemical

Saprolite (from Greek σαπρος = putrid + λιθος = rock) is a chemically weathered rock (literally, it means rotten rock ). More intense weathering results in a continuous transition from saprolite to laterite.. Saprolites form in the lower zones of soil horizons and represent deep weathering of the bedrock surface. In lateritic regoliths – regoliths are the loose layer of rocks

Apr 04, 2018 Labor costs made up 26% of total costs at sulfide operations in 2017, compared with an average of 15% across limonite and saprolite operations. This is a result of sulfide operations — which exploit hardrock deposits, sometimes at significant depth — using more complicated mining techniques, which require a greater number of employees

limonite and saprolite in which the water table ed fluctuatalong the years. The situation becomes more complicated when the problematic soils present in the cut slope in which topographic of depression (commonly a swampy area, sag ponds, and small basins) constitutes a tectonic product of

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 developed under conditions of tropical weathering (fig. 32) over a wide variety of bedrock types but distal to known bedrock gold deposits

limonite saprolite fractions Prior art date 2008-11-28 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Withdrawn Application number EP09828442A Other languages German (de) French (fr) Inventor Damien Krebs

of saprolite ore and limonite samples shown on figure 3. Figure 3 is the relationship between the reduction temperature of saprolite samples at various variations of reduction time There is the influence of the amount of reducing agent on metallization of nickel at a

Dec 01, 2017 The limonite and saprolite ores used in this study were obtained from Southeast Sulawesi, Indonesia and were ground to obtain the grain sizes of − 250 + 177 μm, − 177 + 149 μm, and − 149 + 75 μm.ED-XRF analysis of limonite and saprolite samples determined their chemical composition as summarized in Table 1.X-ray powder diffractrometry (XRD) analysis showed their mineralogical

Apr 04, 2018 Labor costs made up 26% of total costs at sulfide operations in 2017, compared with an average of 15% across limonite and saprolite operations. This is a result of sulfide operations — which exploit hardrock deposits, sometimes at significant depth — using more complicated mining techniques, which require a greater number of employees