The flotation of complex solid–liquid multiphase systems involve interactions among multiple components, the core problem facing flotation theory. Meanwhile, the combined use of multicomponent flotation reagents to improve mineral flotation has become an important issue in studies on the efficient use of refractory mineral resources. However, …
Comparative results, assuming the same selectivity of the natural pH tests when normalised to the acidic feed grade of 23.3% Cr2O3. Recoveries are expressed in terms of the deslimed samples as feed.
Dispersion characteristics and flotation recovery of different size coal slimes affected by the impeller stirring speed or effective power in a mechanical flotation cell were investigated. The effe...
Batch flotation tests were carried out in a single-tank flotation cell (RK/FD11 1.5 L). The detailed operation process can be found elsewhere [27], and will not be presented herein.During each batch flotation tests, the pre-conditioned pulp was diluted to 1.5 L with a density of 20 g/L. 2-octanol was added to the pulp as frother, and its dosage …
Different grinding media had significant effects on flotation performance and chemistry. • Mild steel rods produced the highest recoveries, highest EDTA extractable …
Changing of the grinding media used for the ore sample from a high carbon steel to a high chromium alloy steel resulted in a significant increase in the maximum recovery and flotation rate ...
To understand the effect of these interactions in the context of the processing of sulfide minerals, this study seeks to consider the effect of three factors, viz mineral type – pyrite (Py) and galena (Gn) -, milling media of different compositions – forged steel (FS), 21 per cent high chrome and ceramic media -, and water chemistry, viz ...
An example of testing the effect of pH on rougher flotation on pit samples and the results are presented. Since this is only an example, it needs reminding that not all ores will respond the same. Here, rougher …
The mechanical strength of high strength gypsum prepared from PG concentrate was significantly better than that of raw PG, indicating that flotation purification can effectively improve the ...
The effect of high intensity conditioning before flotation on hydrophobic flocculation of sulfide minerals and its relationship with flotation of low-grade copper-nickel sulfide ore were ...
During flotation the amount of chrome recovered with PGMs need to be minimized to avoid smelter feed containing high chrome content. The relationship between chrome grade and recovery is shown in Fig. 4. Highest chrome grades are achieved at pH of 11 whilst the highest recovery is at pH of 9.
Under milling conditions of low impact and high abrasion, the more expensive high-Cr white cast irons can be cost effective (Farge and Barclay, 1975). Our previous research (Blickensderfer, et al., 1983) showed that the impact resistance of high-chromium white cast iron is greatly affected by heat treatment.
Flotation concentrates derived from processing UG-2 ore are typically characterized by high chrome contents (>3 wt.%) which are not amenable to conventional PGM smelters. The net effect of high chrome, inter alia, includes increased smelting energy requirements and the reduction of effective furnace capacity.
The dosage of a collector is an important factor that determines the efficiency of a froth flotation process. The representative sample of the carbonatitic Palabora copper ore ground 45 % passing 75 µm was froth-floated with sodium isobutyl xanthate (SIBX) collector at 60, 70, 80, 90 and 100 g/t dosages. The concentrates and tails were dried …
In contrast, high chrome steel grinding media have been found to produce higher sulfide flotation recovery (Greet et al., 2004; Greet et al., 2005). The results in this study agree well with these ...
1. Introduction. Flotation is an effective method for the selective separation of minerals, which depends on the differences in the physicochemical properties of various particles [1], [2].It's widely used in mineral beneficiation [3], water treatment [4], biotechnology [5], microplastics removal [6] etc. In the mining industry alone, over two …
steel to high chrome media (30% chrome), the recoveri es and the grade of copper were expected to improve f rom the laboratory tests done. The wear ra te of the high chrome media was 3 times less ...
The proper/ideal flotation reagent needs to be selective and aims at putting the correct metals in the correct concentrates and maximize specific revenues. More mass can kill you! Why is %Mass Recovery/Pull important. Comparing Hydroxamate Collectors. Copper Oxide Flotation. Flotation of Oxide. Naturally Floating Gold. Flotation Without …
flotation rate, particle size recovery, air flow, pulp density, etc.) As a result, it is difficult to study the effects of any single factor in isolation, and compensation effects within the system can keep process changes from producing the …
International Journal of Mineral Processing and Extractive Metallurgy 2021; 6(3): 41-52 43 Figure 1. Eh-pH diagrams of the system Cr-O-H. 298.15K, 10 5 Pa [23]. The chromite dissolution mechanism ...
The flotation was also found to favour the recovery of chromite particles with high chrome to iron ratio.The experiments showed a distinct abundance between the chromite surface charge and the ...
These changes can be deleterious to copper flotation. It has been shown that chrome alloy balls can have beneficial effects on flotation performance in some systems by limiting the formation of ...
Relative wear resistance of two types of ball materials, namely high carbon low alloy (HCLA) cast steel and high chrome cast iron balls was assessed. The influence …
The samples of scheelite, calcite and fluorite were all obtained from Xintianling mine, Hunan, China. Hand-selected crystals of these minerals were crushed to −1 mm by a laboratory roll crusher.The crushed products were then ground in a ceramic ball mill and dry-sieved to obtain the −74 + 38 μm-size fractions for micro-flotation tests.A …
Corrosion of grinding media in ball mills can be affected by several variables. The impact on corrosion potential and rate of chromium content of grinding …
The frothers, Dowfroth 200 (DOW 200) and Dowfroth 250 (DOW 250), supplied by Betachem were added at dosages of 40, 50 and 60 g/t.The collector, sodium isobutyl xanthate (SIBX), supplied by Senmin was added to the mill prior to grinding at a dosage of 150 g/t.The polymeric depressants used in the batch flotation tests were …
strength etc.) on the efficiency of the flotation process (Rao and Finch, 1989). Studies have shown that recycled process water in mineral processing has a high salinity, contains po-tentially toxic metals ions, flotation reagents, organics …
The pH of the flotation was held constant at 9.5 using lime. Time cuts of concentrate were taken using a batch Wemco flotation cell with an automated paddle removal device at 30 seconds, 1, 2, 4, 8, and 16 minutes. Table 3 lists the overall R and K values measured for the total flotation feed run under each condition.
All flotation tests were performed soon after sample preparation to avoid oxidation. Table 2 lists the reagents used for flotation tests which were performed in a 5-liter cell. The value of pH was set to be 11.2 for all tests. All reagents were used based on the plant practice. Table 2 Reagents used in flotation tests
hydrodynamic properties of frothers and collectors and their effect on flotation performance. This new understanding of ... The tail in a flotation circuit is high. The operator wants to increase the mass pull and increases the frother dosage to increase kinetics. The froth persistency and volume is increased significantly but the mass pull is …
It is reported that good flotation is obtained in the neutral pH range. The mech-anism of this flotation is not, however, clearly established. Chemisorption of oleate on hematite has been proposed to be the major factor causing the flotation. Effect Of …
The high resistance of the chrome balls could be attributed to the resistance of the balls to corrosion (passivation), especially in the presence of oxygen, as discussed before. Moroz (1984) has used marked ball wear tests in wet ores to examine the effect of the microstructure of 0.90% C forged steel balls on their wear resistance.
The influence of grinding conditions on the pulp chemistry of oxidised pyrite and its subsequent flotation behavior was studied in this paper. The oxidised pyrite particles were ground with forged steel or 30% chrome steel either in atmosphere or in a nitrogen …
DOI: 10.1016/J.MINENG.2012.03.028 Corpus ID: 96358829; The effect of frother type and dosage on flotation performance in the presence of high depressant concentrations @article{Wiese2012TheEO, title={The effect of frother type and dosage on flotation performance in the presence of high depressant concentrations}, author={Jennifer Gael …
Recent years has seen an upsurge in the interest for recovering PGM concentrates from traditional chrome producer's tailings streams and dams.
