effects of gypsum on copper flotation

The interaction of clay minerals with gypsum and its effects on copper–gold flotation. June 2015. Minerals Engineering 77. DOI: 10.1016/j.mineng.2015.03.010. …

The presence of clay leads to low recoveries in the process of flotation of copper ores which is also reflected in a decrease of the concentrates grades. Due to this, the scientific interest in studying the effect and mechanisms of action of clay minerals in the flotation process has increased, which has resulted in a better understanding of the …

Semantic Scholar extracted view of "Interactions of clay minerals in copper–gold flotation: Part 1 – Rheological properties of clay mineral suspensions in the presence of flotation reagents" by N. Cruz et al.

Abstract Calcium and magnesium are commonly present in flotation process waters in the order of 500 and 50 ppm, respectively. The effect of Ca (500 ppm) and Mg (50 ppm) ions on the uptake of copper … Expand

As well, several studies have reported that the addition of sodium carbonate enhanced the flotation kinetics of galena and sphalerite (Grano et al., 1995, Espinosa et al., 2009), as this reagent causes the dissolution of gypsum (adhered on the mineral surface) and the precipitation of calcium carbonate (which disperses in the bulk solution ...

The interaction of two clay minerals, kaolinite and bentonite with gypsum and its effects on the flotation of a copper–gold ore was investigated in this study. It was found that bentonite increased the viscosity more than kaolinite when mixed with the …

The effect of gypsum on rheology and flotation was more noticeable than the effect of pH modifiers and this is because gypsum released sufficient quantities of Ca2+ to modify double layers of the clay minerals and inhibit the swelling of bentonite, which was not the case when lime or soda ash was added to adjust pH.

An investigation was made of the effects of the cooling rate and slag modification by simultaneous additions of gypsum and carbon on copper and copper …

Copper recovery increased from 85% to 90%, 94% and 93% at the end of flotation, in the presence of DP-1777, DP-1775 and DP-1778, respectively. DP-1775 and DP-1778 had a better effect on copper recovery than DP-1777. The presence of biopolymers also led to an increase in flotation rate, seen as the higher copper …

An investigation was made of the effects of the cooling rate and slag modification by simultaneous additions of gypsum and carbon on copper and copper matte particle sizes in an industrial copper matte smelting slag. ... Bruckard WJ, Somerville M, Hao F (2004) The recovery of copper, by flotation, from calcium-ferrite-based slags …

Gypsum supersaturated process water has been shown to have an adverse effect on the flotation of sphalerite minerals. This study probes the mechanism of such effect by determining the uptake of copper and xanthate on sphalerite in gypsum supersaturated water using zeta potential distribution measurement, atomic absorption …

authors, the effect of gypsum on the flotation of a copper-gold. ore in the presence of clay minerals was investigated (Cruz et al. 2015c). As shown in Figure 11, …

The effect of clay minerals in flotation and treatment methods are summarized, which is helpful to provide technical reference for the research of flotation technology with high …

Before copper activation of sphalerite, heterocoagulation cannot be produced by gypsum due to the negative charge of both sphalerite and gypsum. However, after copper activation, sphalerite becomes positively charged and, therefore, interacts with negatively charged gypsum such that heterocoagulation will occur (Davila-Pulido and …

The effect of biopolymer dispersants on copper flotation in the presence of kaolinite @article{Wang2016TheEO, title={The effect of biopolymer dispersants on copper flotation in the presence of kaolinite}, author={Yanhong Wang and Rolf Andreas Lauten and Yongjun Peng}, journal={Minerals Engineering}, year={2016}, volume={96}, …

1. Introduction. Molybdenite (MoS 2) is the main source of molybdenum which plays a significant role in the modern society with its principal use as a ferro-alloy in iron and steel industries (Dutta and Lodhari, 2018).Molybdenite is often associated with copper sulfides such as chalcopyrite (CuFeS 2) and chalcocite (Cu 2 S). Conventionally, …

A high-clay-content gold ore and a clean gold ore with a low clay content were supplied by a gold flotation plant. The key mineral and elemental compositions of the two ores are listed in Tables 1 and 2, respectively.The analysis by quantitative X-ray Diffraction (XRD) indicates that the major gangue minerals in the high-clay-content ore are kaolinite …

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 performance of PG. Phosphogypsum (PG) is a massive industrial solid waste. In this paper, PG was purified by flotation method, and α …

In this study, three lignosulfonate-based biopolymer dispersants, DP-1775, DP-1777 and DP-1778 were used to mitigate the deleterious effect of kaolinite entrainment in copper flotation. The rheological measurements indicated that the yield stress of kaolinite suspension decreased with increasing biopolymer addition and this is seen as a …

The effect of flotation operational parameters on froth stability and froth recovery was studied. Froth stability was measured using a special column. To determine the froth recovery, the froth height change model and froth height exponential model were used. It was found that since the interactions between the pulp and froth zones affect the ...

Abstract. Amorphous silica is an abundant gangue mineral in ore deposits, but its effect on mineral flotation is unknown. In this study, the effect of amorphous silica on pulp rheology and chalcopyrite flotation was investigated. It was found that the presence of amorphous silica increased the pulp viscosity more significantly than quartz ...

DOI: 10.1016/J.MINENG.2015.03.010 Corpus ID: 93657867; The interaction of clay minerals with gypsum and its effects on copper–gold flotation @article{Cruz2015TheIO, …

For the past few years, an increasing number of studies have considered gypsum as gangue mineral in mineral flotation [22, 23], because mass of calcium and sulfate ions are dissolved by gypsum ...

Semantic Scholar extracted view of "Effects of aluminosilicate minerals on copper-molybdenum flotation from Sarcheshmeh porphyry ores" by E. Jorjani et al. ... The interaction of clay minerals with gypsum and its effects on copper–gold flotation. N. Cruz Yongjun Peng Elaine M. Wightman Ning Xu. Materials Science.

economic to acid heap leach the stockpile. The recovery of these copper minerals by flotation or. hydrometallurgy from ores, typically containing 0.5%TCu (open pit mines) and 1-2%TCu (underground ...

An efficient flotation separation process is mostly governed by variables from two fundamental aspects: surface chemistry, and hydrodynamics. Judging from the numerous research work reported in the open literature, it can be seen that significant progress has been made of flotation chemistry; however, flotation hydrodynamics …

The effect of aluminosilicate minerals on floatability of copper sulfides was evaluated and ways to decrease their unwanted effects tested. It was shown that ore types that contain muscovite and vermiculite have the greatest effect on the floatability of copper sulfides. A mixture of reagents as well as flotation at reduced pulp density can be ...

It can be observed that the flotation recovery of quartz increased with pulp pH and reached the maximum 94% around pH 5.0–8.0. While the flotation recovery of gypsum was below 16% within the examined pH range. The flotation recovery differences between quartz and gypsum were exceeding 60%. The results in Fig. 3 clearly show …

The effect of process water salinity on the processes of copper flotation from the Lubin mine area was described. The results of laboratory flotation experiments conducted in tap water and in ...

Phosphogypsum (PG) is a massive industrial solid waste. In this paper, PG was purified by flotation method, and α-hemihydrate gypsum (α-HH) was prepared by the autoclaving method. The morphology ...

The flotation of copper minerals is typically carried out at a pH above 10.5, to depress non-valuable sulfides such as pyrite, which will otherwise float and contaminate the concentrate [6,7].

DOI: 10.1016/J.CLAY.2019.01.013 Corpus ID: 104460720; The effect of clay minerals on the process of flotation of copper ores - A critical review @article{Jeldres2019TheEO, title={The effect of clay minerals on the process of flotation of copper ores - A critical review}, author={Ricardo I. Jeldres and Lina Uribe and Lu{'i}s A. Cisternas and Leopoldo …

The effect of gypsum on rheology and flotation was more noticeable than the effect of pH modifiers and this is because gypsum released sufficient quantities of Ca2+ to modify …

The effects of TDBAC concentration on the flotation recovery of quartz and gypsum were investigated at nature pulp pH 7.5 ± 0.1 and the results are shown in Fig. 4. When TDBAC concentration was lower 10 −4 mol/L, the flotation recoveries of quartz and gypsum were all increased with increasing TDBAC concentration. After that the …

DOI: 10.1016/J.CLAY.2019.01.013 Corpus ID: 104460720; The effect of clay minerals on the process of flotation of copper ores - A critical review @article{Jeldres2019TheEO, …

Abstract Calcium and magnesium are commonly present in flotation process waters in the order of 500 and 50 ppm, respectively. The effect of Ca (500 ppm) and Mg …

The precipitation of Ca2+ and SO 4 2− ions as gypsum had a detrimental effect on the natural floatability of molybdenite because of gypsum crystal attachment on the faces of the molybdenite particles. This precipitation phenomenon may be initiated in copper-molybdenite flotation circuits that use recycled saline water, like seawater ...

Formation of calcium sulphate (gypsum) by the interaction of calcium ions with sulphate ions in the pulp produces fines slime coatings on the sulphide minerals and hinders the flotation of the desired minerals ( Raghavan and Hsu, 1984, Grano et al., 1995, Zanin et al., 2019 ). Sulphate may also increase capital expenditure because of its …

For example, molybdenite flotation is favored by the presence of Na + and Cl − ions, but Ca 2+ and SO 4 2− reduce its flotation, and gypsum (CaSO 4 ⋅2H 2 O) coats molybdenite particles ...

Flotation waste of copper slag (FWCS), neutralization sludge (NS), and arsenic-containing gypsum sludge (GS), both of which are difficult to dispose of, are major solid wastes produced by the copper smelting. ... The effects of four factors on the synthesis of the ... Ke, Y. et al. Co-treatment of flotation waste, neutralization sludge, …