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chrome from ug2 tailings process design criteria
Posted at: August 8, 2012. Metallicon Process Consulting Development of fine grinding flow sheets and process design criteria-Chrome from UG2 tailings spiral plant process design.-PGM…
What is chromite (chrome) ore and where is it found
UG2 tailings is the material left after the PGMs have been extracted from the UG2 ore through a floatation and concentration process. The UG2 tailings have low Cr:Fe ratios and chromite content, compared to conventional Lower Group (LG) and Middle Group (MG) chrome ores, which are the conventional chrome bearing ores mined in South Africa.
Beneficiation of South African chromite tailings using
Keywords: Ultra-fine chromite tailings, Magnetic separation, Characterization, Chromite 1. Introduction Chromite recoveries is a major concern particularly in processing of finely disseminated ores due to its inherent complexities. The gravity separation process is the main beneficiation process used to recover chromite mineral. However,
A study on the recovery of fine chromite from UG2 tailings
Semantic Scholar extracted view of "A study on the recovery of fine chromite from UG2 tailings" by V. Ross et al. ... Chrome ore beneficiation challenges & opportunities – A review ... Flotation can be considered as a leading process to beneficiate the fine chromite which cannot be enriched by gravity separation. … Expand. 6. PDF.
Experiences in the production of metallurgical and chemical grade UG2
Recovery of a chromite concentrate from UG2 flotation tailings streams, of a grade suitable for further pyrometallurgical treatment for the production of ferrochrome, has certain specific ...
A study on the recovery of fine chromite from UG2 tailings
Section snippets Ore. A typical composition of the PPM UG2 tailings material in terms of size and Cr 2 O 3 content is shown in Table 1. The concentrator flowsheet is configured in an MF2 (mill-float-mill-float) arrangement, with the final tailings being a combination of the secondary rougher and secondary first-stage cleaner tailings.
Application of Response Surface Methodology on the
The aim of this study was to optimize the recovery of chromite from the chrome plant tailings of the South African Middle Group chromite seams using a shaking table. …
A study on the recovery of fine chromite from UG2 tailings
Chromite is usually recovered as a by-product from coarser UG2 tailings by gravity separation, involving spirals and/or Reflux classifiers. The focus has now shifted to also …
Process development for elemental recovery from PGM …
5 Figure 1. Process flow diagram for the multi-stage extraction of major elements from PGM mine tailings (* MT tct contains M-SO 4 compounds, where M is a metal; the highlighted area represents the focus of this study).
The impact of platinum production from UG2 ore on …
the latter process, even more UG2 can be used due to the higher chrome recovery of the process. The pellets are fed in various forms, including prereduced, sintered/pre-oxidized, cold or preheated, to a SAF. In terms of DC-arc furnace smelting, the process is inherently suitable for the use of UG2 The Journal of The South African Institute of ...
Chrome ore beneficiation challenges & opportunities – A …
Research highlights High tailing losses from the existing chromite plants (9–20% Cr 2 O 3). Accumulation of huge amount of low and sub-grade fines (10–30% Cr 2 O 3). Utilization of stockpiled tailings containing chromite values. Concentrate with required Cr 2 O 3 content and Cr/Fe ratio. Unrecoverable ultrafine chrome particles.
(PDF) Recovery of Chromite Values from Plant …
The maximum of 83% recovery of chromite is possible with 22 to 23% Cr 2 O 3 content and thus obtained FDS underflow is suitable for flotation circuit. A low teeter water flow rate with a high bed ...
cost of chrome process beneficiation plant
chrome from ug2 tailings process design criteria Fonz. 6.1.1 The selection and splitting process for the preparation of the UG2 HG FT composite sample (UG2 Tailings sample) As indicated in section 3.4 the majority of chrome present in the UG2 Reef exploited by the platinum producers deports to the tailings stream from the Concentration process.
(PDF) Recovery of Chromite Values from Plant …
The Tata Steel Chrome Ore Beneficiation (COB) plant is generating 50 tph of tailings assaying 17% Cr 2 O 3. A critical review on practice of the plant operating personnel is concerned in the grade ...
chrome ore tailings in cement industry
chrome ore tailings beneficiation . Chrome beneficiation from PGM flotation tailings Know More. Platinum Group Metals PGMs concentrators in the Eastern Limb of the Bushveld Complex in South Africa treat UG2 ore that contains a high chrome content Chrome has a low beneficiation cost compared to other metals and is therefore an integral part of the extraction …
OVERVIEW OF PGM PROCESSING
UG2/Platreef, 3-6 4E g/t) •Composite concentrate (100-500 4E g/t) •Tailings (to tailings dams) •Chromite recovery •Converter matte (>2,800 4E g/t) •Sulphuric acid •Autocatalysts •Jewellery •Other Industrial products (e.g. chemicals, electronics, fuel cells) Mining Crushing & Milling Froth Flotation Drying and smelting in
Fine chrome beneficiation and reverse PGM upgrade of …
Multotec Process Equipment, Johannesburg, South Africa The main differences between a vertical and a horizontal ring WHIMS machine are described. Four UG2 samples with P 80=100 μm were delivered from four different slimes dams on the western limb of the Bushveld Complex containing gravity separation tailings.
Extraction of Platinum Group Metals | IntechOpen
The UG2 concentrate has higher chrome content when compared to the Merensky as seen in Tables 3 and 4. UG2 also has higher PGM content than the Merensky concentrate. ... Another innovation able to manage …
The extractive metallurgy of South Africa's platinum ores
This paper explores bioleaching as a viable method for extracting precious group metals (PGMs) with potential advantages over the traditional energy-intensive extraction processes that cannot cope ...
Metallurgical Testwork From Scoping To Feasibility Study …
Testwork will include chemical and mineralogical analyses of each test composite followed by metallurgical testing to evaluate the recovery process, whether it is flotation, agitated cyanidation for gold or silver recovery, heap leaching for gold or copper recovery, etc. Testwork is directed at developing a preliminary flowsheet and material ...
PGM recovery from chromite tailings
1 Abstract. Recent years has seen an upsurge in the interest for recovering Platinum Group Metal (PGM) concentrates from traditional chrome producer's tailings streams and dams. This is evident ...
Converting Tailings Dumps into Mineral …
This is particularly the case for tailings dumps created from the processing of platinum group elements (PGEs) from the UG2 reef in the Bushveld Complex (BC) of South Africa, which are now being retreated to recover …
The Reduction of Chrome in UG-2 Flotation Concentrate by
Pareto chart of 2 4 full factorial design of main and interacting factors. A, B, C and D are main factors: A -temperature, B -time, C -acid concentration, D -oxygen flowrate.
A study on the recovery of fine chromite from …
The tailings typically has a grade of between 17 and 21% CrO3 and 31% SiO2, with 78% of the. chromite and 73% of the mass contained in the -38 μm fraction. With such a fine grind, it is evident ...
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Application of Response Surface Methodology on the
The aim of this study was to optimize the recovery of chromite from the chrome plant tailings of the South African Middle Group chromite seams using a shaking table. The optimization process employed the response surface methodology in conjunction with the central composite design. The independent variables considered in the investigation included …
Chrome beneficiation from PGM flotation tailings
Chrome has a low beneficiation cost compared to other metals and is therefore an integral part of the extraction process on UG2 ores during these difficult economic times.
A study on the recovery of fine chromite from UG2 tailings
1. Introduction. The recovery of chromite from the tailings streams of South African UG2 platinum concentrators adds significant financial returns to the mining operations. …
Chromium ore at Implats
pumped to the tailings dams. The UG2 tailings at Two Rivers that have been reprocessed at an average Cr 2 O 3 grade of 15%. The tailings dams at Two Rivers currently contain some 24 million tonnes of milled and processed ore, at an average Cr 2 O 3 grade of 17%. No mining has taken place at Afplats. The UG2 Reef in this area has an average in ...
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