Ug2 Chromite Processing

Oct 01, 2011 Indeed, the main challenge in processing the UG2 ore is to try to limit the chromite content of the PGM concentrate to a maximum of 2.5% Cr 2 O 3. It has been shown that higher chromite contents in the furnace feed would negatively impact the pyrometallurgical process (McKenzie, 1996). Download : Download full-size image; Fig. 1.

UG2) relative to a potential tholeiitic liquid ( 40 ppb (Davies & Tredoux, 1985)) is about 200. These ball-park figures are within a factor of 4 and suggest that the process that led to the crystallization of chromite simultaneously led to the crystallization and co-concentration of PGM. This requires the processing of a large volume of liquid

chromite and the valuable minerals predisposes the PGM ores to an inefficient froth flotation and thereby leads to drastic problems at the smelters. Entrainment of fine chromite is a major problem, so the reduction of fine chromite content in the UG2 ore prior to flotation is therefore crucial.

Processing of UG2 ore for concentration of platinum group minerals (PGMs) is a challenging task. UG2 ore contains significant amounts of chromite which is hydrophilic in nature and reports to the concentrate by means of mechanical entrainment. This is a serious problem for

produced with UG2 or metallurgicalgrade South African chromite: A case study,” 2015. [3] S.D.Opoubou-Lando, “Mineralogical characterisation of chromite in the UG2 Reef from Waterval Mine , Western Bushveld : Implications for minerals processing,” Cape Town, 2010.

Chromite contained in UG2 concentrates presents challenges in smelting, with constraints being placed on the amount of chromite that flotation concentrates can contain reducing flotation recovery. Kell was designed to remove this chromite constraint and it is completely insensitive to chromite. Over the years of development, the Kell Process ...

high-chromite UG2 and the lower-grade Platreef ores, and less from the traditional Merensky Reef, which is historically the backbone concentrate feed to PGM smelters. The impact of higher chromite contents and lower PGM grades on smelter furnace efficiency and operating costs is of prime importance to the ongoing sustainability of the PGM industry.

UG2 Chromitite layer . Figure 3.2 Pyroxenite and chromitite layers of the UG2 Reef (Photographed by Anel McDowell, 2007). 3.3 MINERALOGY OF THE UG2 REEF . 3.3.1 General mineralogy . According to McLaren and De Villiers [21] the UG2 Reef consists primarily of chromite (60 -90% by volume), orthopyroxene (5-25%) and plagioclase (5-15%).

Oct 18, 2015 The UG2 reef is the dark material at the top of this photo which was taken in the Bushveld complex; one of the mines there. PGE’s may also be unassociated with chromite and instead be associated with minor amounts of copper nickel sulfide as in …

Sep 28, 2020 Chromite ore fines are produced as a result of mining and processing of various chromitite seams, either as a by-product of PGM ore processing or purely for their Cr content. Previously, chromite was mined to produce mainly lumpy or …

UG2 or metallurgical grade South African chromite ... b Minerals Processing Division, Mintek, Randburg 2125, South Africa c Glencore Alloys, PO Box 2131, Rustenburg 0300, South Africa Contributions to article The contributions of the various co-authors were as follows. The work was conducted

The chromite recovery plant then reprocesses the UG2 tailings generated by the concentrator to recover the chromite. The chromite recovery plant was commissioned in 2013 and is owned and operated by Two Rivers, which also has an offtake agreement with Chrome Traders whereby all of the concentrate produced is purchased on a free carrier basis ...

Processing of UG2 ore for concentration of platinum group minerals (PGMs) is a challenging task. UG2 ore contains significant amounts of chromite which is hydrophilic in nature and reports to the concentrate by means of mechanical entrainment. This is a serious problem for the downstream smelting process, which generally has a constraint of 3 ...

It is common practice in the mineral processing industry to use hydrocyclones for particle classification. However, classification in the UG2 platinum circuits using the hydrocyclone poses major challenges due to the differences in density between silica and chromite, the …

Oct 01, 2011 Indeed, the main challenge in processing the UG2 ore is to try to limit the chromite content of the PGM concentrate to a maximum of 2.5% Cr 2 O 3. It has been shown that higher chromite contents in the furnace feed would negatively impact the pyrometallurgical process (McKenzie, 1996). Download : Download full-size image; Fig. 1.

processing plant chromite Bonda's Specials. chromite processing plant design. Previous Projects Metallicon Process Consulting Development of fine grinding flow sheets and process design criteria -, Chrome from UG2 tailings spiral plant. More Price

Jan 14, 2021 Reprocessing of UG2 secondary tailings for the recovery of additional PGMs after the extraction of chromite has become common practice for UG2 tailings operators. When chromite is recovered from UG2 tailings, the resultant waste material retains any PGMs that were “lost” during the initial processing of primary ore.

PGM extraction circuit and secondary chromite extraction activity as applied specifically to UG2 ore against a background of actual plant experiences and circuit configurations applied in order achieve a suitable quality of chromite concentrate. Keywords UG2 chromite, spiral concentrators, chromite beneficiation * Xstrata, Rustenburg, South Africa.

A major challenge in the processing of PGM-bearing UG2 ore is the fact that it is comprised largely of chromite (60–90% by volume). Chromite is generally not naturally floatable but significant ...

producers have begun to mine the less attractive UG2 reef because of its cheaper mining costs. This UG2 reef contains significant quantities of chromite with typically a chrome-to-iron (Cr/Fe) ratio of 1.35. UG2 ores can contain between 10 and 25% Cr2O3 depending upon the …

Jan 07, 2021 The UG2 Reef is a platiniferous chromitite layer which, depending on the geographic location within the complex, is developed some 20 to 400 m below the Merensky Reef. The UG2 consists predominantly of chromite with lesser silicate minerals (5–30% pyroxene and 1–10% plagioclase). Other minerals present in minor concentrations can include ...

Oct 01, 1999 Abstract. The UG2 reef of the Bushveld Igneous Complex in South Africa is a valuable source of platinum group metals (PGMs) that is beneficiated by flotation. Chromite is one of the main gangue consituents of UG2 ore and it is essential that the amount of chromite reporting to the concentrate during flotation be minimised since it is ...

The upper group two (UG2) concentrate from a platinum group metal (PGM) mine in Rustenburg is also selected. Each mine produces 3 grades of chrome ore, namely lumps, chips, and concentrates. The lumps and chips of chrome ores are used as raw material and are directly fed in submerged arc ...