This paper describes the results of a series of physical separation, and chromite bench flotation tests that have been carried out at acidic and natural pH respectively, on UG2 tailings from ...
Characterisation. Chromite sample was obtained from the western limb of the BIC along the Middle group seam. The samples were from MG1, MG2, MG3 and MG4.
By this work, selective flotation of various chromite ores were studied to determine some of the features of chromite flotation. Different chromite ores from South Africa were made flotation using the anionic collector, A825 (petroleum sulfonate), after conditioning with H2SO4 at low pH values in the range of 1 and 3.
A specific silica/chromite sand blend referenced in the 2014 University of Northern Iowa research at the World Foundry Organization is crucial to this future effort (Fig. 9). This article is based on the paper "Chromite Sand as a Replacement for Zircon and Zircon/Silica Sand in Shell Applications" (Paper 23-013) originally presented at the ...
The reduction behavior of a natural chromite from the Bushveld Complex of South Africa was studied at 1300 °C to 1500 °C. Reduction was by graphite in the presence of silica. Thermo-gravimetric analysis, X-ray diffraction (XRD) analysis, energy-dispersive X-ray analysis (EDAX), and metallographic analysis were the experimental techniques …
Chromite occurs as chromium spinel, a complex mineral containing magnesium, iron, aluminum, and chromium in varying proportions depending upon the deposit. It varies widely in composition according
The recovery of chromite from the tailings streams of South African UG2 platinum concentrators adds significant financial returns to these operations. Whilst the coarser fractions are amenable to processing by physical separation, the focus is now also on the recovery of fine (typically −75 µm) chromite by flotation.
Different chromite ores from South Africa were made flotation using the anionic collector, A825 (petroleum sulfonate), after conditioning with H2SO4 at low pH …
Download scientific diagram | Separation by flotation of the (GL30 Olivine-M4 chromite) system at various amounts of chromite added (3.3-20%) with 150 mg/L CTMAB at pH 11; (a) fraction of ...
Download scientific diagram | Separation by flotation of the (GL30 Olivine-M4 chromite) system at 3.3% chromite added with 50 and 150 mg/L CTMAB at pH 11 without stirring; a) fraction of recovered ...
The flotation of naturally occurring chromite was found to depend on whether the ground material was aged in air or not and whether the mineral had been heated. In general the observed effects could be …
Chromite is a dark, opaque mineral with a high specific gravity and metallic luster. It is typically found in the form of euhedral crystals, irregular grains, or as interstitial material between other minerals in the host rock. Chromite is composed of chromium, iron, and oxygen, with variable amounts of magnesium, aluminum, and other elements.
Chromite is an important strategic mineral usually associated with other gangue minerals, mainly silicates. A good knowledge of the flotation behaviour of chromite and the establishment of ...
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.
For the PCMZ_HG flotation tailings the chromite abundance decreased with increased milling from 10% in the unprocessed ore to 5% at the coarsest grind, and increased to 8% at a target grind of P80 of 75 µm …
The dominant flotation process currently used for processing of siliceous phosphates in Central Florida is the Crago "Double Float" process (Giesekke, 1985; Zhang et al., 1997).The simplified flotation flowsheet is given in Fig. 1.In this process, after desliming and sizing, the ore is conditioned with fatty acids and fuel oil at a pH of 9.0–9.5.
As mentioned earlier above, the effect of silica addition on reduction of chromite at 1300 °C was minimal at all the particle sizes and at all levels of silica addition.At higher temperatures of 1400 °C and 1500 °C, the influence of silica was strong at an optimum level of 7.5% addition.A typical plot is illustrated in Fig. 1.The results for …
Download scientific diagram | Separation by flotation of the (GL30 Olivine-M4 chromite) system at 3.3% chromite added with 150 mg/L CTMAB at pH 11 depending on the stirring conditions; (a ...
ORIGINAL ARTICLE Processing of Low-Grade Chromite Ore for Ferroalloy Production: A Case Study from Ghutrigaon, Odisha, India Asish Kumar Das1 • Somnath Khaoash1 • Sarada Prasad Das 2 • Birendra Kumar Mohapatra1 • Nilima Dash2 • Saroj Kumar Singh3 • Patitapaban Mishra1 • Jayakrushna Mohanty3 Received: 13 December 2019/Accepted: …
Intensive research on iron ore flotation started in America in 1930s. A variety of flotation routes have been developed to remove silica from iron minerals. The flotation routes of iron ore can be classified into f ive major groups, i.e. cationic flotation of iron oxide, cationic flotation of quartz, anionic. Ver artículo
Floatation feed thus also tends to be significantly fin er than in conventional PGM floatation circuits. Float feed d80's of 38 µm has been reported at cer tain operations with the d80 at times ...
Kolkata Flotation Of Chromite From The Silica. Kolkata Flotation Of Chromite From The Silica. Chromite ores, as might many others, be mined by open-pit and underground methods. The share of underground mining varies between countries and deposits. The extracted ore is subjected to crushing and sorting normally rich ore containing more than …
Flotation of high silica and high alumina ore as a function of pH; effect on Fe (a) grade and (b) recovery. 3.3.3. Direct flotation studies of high Al and high Si iron ore. The ores studied by reverse flotation were also subjected to direct flotation in order to understand the difference in their response. However, both the ores showed very ...
Flotation recovery of chromite as a function of pH at constant SDS concentration 1 x 10 -4 M is shown in figure 2. The four separate curves of the figure demonstrate the effect of aging of dry …
Indian chromite ore. The removal of silica from different . ... Based on the results, two flow sheets comprising gravity, magnetic separation and flotation, were used to recover chromite values. A ...
The requirement for higher quality pellets demands that the silica content be lowered to levels ranging from 0.25% – 2.0% SiO2. Reverse flotation (silica is floated away from the iron concentrate) has proven to be an economical and effective method for reducing the concentrate silica content to very low levels.
Using glassware will introduce negligible silica into the analysis, although one must be careful not to unintentionally add silica by accidentally chipping a stirring rod, etc. Carefully police all glassware and crucibles to remove particles of silica. Nonignited silica is quite sticky and adheres readily to most surfaces.
This data on chemicals, and mixtures of chemicals, commonly known as reagents, is presented for the purpose of acquainting those interested in froth flotation with some of the more common reagents …
Typical flotation size/recovery curve (Rule, et al., 2007) As demonstrated in Fig 4, the ideal range for better flotation is well-optimized for most plants for sizes ranging between 75 and 105 µm.
