Flocculation measurement with PDAThe batch flotation results show that the addition of PEO can reduce quartz entrainment and improve concentrate grade in chalcopyrite and sulphide ore flotation. In order to confirm that the lowering of quartz entrainment is due to the bridging flocculation by PEO, a series of photometric dispersion analyzer ...

flocculation of slime phosphate in the presence of clay (9) as a starting point, the Bureau of Mines developed a method for treating finely ground iron ores (4-6). The process has three steps: (T) dispersion of the ore ground with sodium hydroxide for pH control …

Sulfide minerals comprise a group of minerals in which the inorganic anion sulfide (S-2) is typically bound to a metal. The pyrite Jeremiah found in the river is an iron sulfide with the chemical ...

nated ores and for selective desliming, the Bureau of Mines has been investigat­ ing the flocculation beiavior of several cross-linked starch derivatives contain­ ing chelating groups. This report dis­ cusses the flocculation of sulfide miner­ al fines by insoluble cross-linked starch xanthate (ISX).

The topics include: experimental methods in studying flocculants and flocculation; polymeric depressants; use of dispersants and flocculants in flotation (sulfide ores, potash ores, coal preparation, etc.), effect of dispersants on pulp rheology; use of flocculants in solid/liquid separation.

Hydrophobic flocculation of sulphide minerals is the main reason that high intensity conditioning improves the flotation recovery of low-grade sulfide ore. Read more Article

A process for desliming sylvinite ores by a selective flocculation and froth flotation of the slimes is provided. The process involves treating the ore pulp with a high molecular weight acrylamide polymer to flocculate the slimes and then with a cationic collector for the flocculated slimes. The treated ore pulp is then subjected to froth flotation to float off the slimes.

Bio-hydrometallurgical methods to treat various sulphide and oxide ores have been developed during the years and these processes have been adopted by certain mineral industries. Bio-beneficiation processes involving the separation of value minerals from ores and materials using conventional flotation and flocculation methods have been shown to ...

behavior of sulphide ores, such as that in Wushan Mine in Jiangxi Province and Xinqiao and Xiangshan Mines in Anhui Province. Several sulphide ore stockpiles on the ground were also confronted with the risk of spontaneous fire hazards, as shown in Fig. 1 [5, 6].

140 Beneficiation of Hematite Ore by High Intensity Magnetic Separation and Selective Flocculation. 5 Sulphide Flotation 141 Copper and Molybdenite Recovery in Plant and Batch Laboratory Cells in Porphyry Copper Rougher Flotation 142 Electrochemical Study of Synthetic and Natural Enargites

Purpose and goal There are several industrial advantages with a cost and time effective way to evaluate new flocculants in mineral flotation. The main objective of this project was therefore to demonstrate an effective approach to identify potential flocculants for selective flocculation of hydrophilic mineral fine particles.

Selective Flocculation and Flotation. The selective flocculation-cationic flotation system includes (1) stage grinding of the oxidized taconite, with dispersants to liberate the iron minerals from the gangue, (2) selective flocculation of the iron minerals with starch, (3) rejection of a siliceous slime, and (4) finally, cationic flotation of the selectively flocculated material to

The Bureau of Mines conducted research on the flocculation of various minerals with insoluble cross-linked starch xanthate (isx) to determine its potential as a beneficiation technique for low- grade, highly disseminated ores and for selective desliming. Covellite, chalcocite, pyrite, pyrrhotite, chalcopyrite, bornite, sphalerite, galena, and molybdenite fines flocculate with isx.

The presence of fine and ultra-fine gangue minerals in flotation plants can contribute to sub-optimal valuable ore recovery and incomplete water recycling from thickeners, with the performance of the latter equipment relying on adequate flocculation. In order to study the dependence of the flocculation process on the suspension-flocculant mixing conditions, a series of experiments—chosen ...

Base metals such as copper, lead, and zinc are mainly extracted from sulfide ores. Mostly these base metals tend to exist together in an ore. Flotation process is widely used to separate these minerals in sulfide ores [1]. A wide range of chemical reagents are used in the flotation process to separate the different minerals.

Consideration is given to the influence exerted by styrene-butadiene copolymer on wettability of the surface of pyrite, sphalerite, and chalcopyrite as well as on flocculation and floatability of mineral slimes. It is established how pH and styrene-butadiene copolymer combined with xanthate affect the change in hydrophoby of the sulfides in question and the processes of flocculation and ...

A method for the flotation of nickel and copper sulphide minerals from talcose bearing ores using an alkaline circuit in which at least one of the alkaline reagents is soda ash or ammonium hydroxide and following conditioning of the pulp with a collecting agent of the xanthate family to activate the nickel and copper sulphide materials, the pulp is conditioned with a flocculating agent to ...

Selective flocculation using polymers is a promising method for beneficiat-ing mineral fines [1,2J. However, the results obtained for the selective floc-culation of natural ores or the synthetic mixtures do not often correlate with those from single mineral tests [3 J. This can be due to the interactions of

hydrometallurgical methods to treat various sulfide and oxide ores have been developed during the years and these processes have been adopted by certain industries. Bio-beneficiation processes involving the separation of value minerals from ores and materials using conventional flotation and flocculation methods, have been shown to be promising in

Flocculation tests The ground complex sulphide ore has been subjected to flocculation tests which were carried out in a 500-ml graduated cylinder. For this purpose a desired amount of ore was mixed in 450 ml water and the pH of the slurry was adjusted by using dilute HC1 and NaOH.

Experiments to obtain selective flocculation of sulfides from quartz were attempted. Good selectivity was only obtained for the bornite-quartz system. Postflocculation separations resulted in flocculated bornite in grades as high as 92 pct. Evidence is presented that the flocculation of many of the sulfide minerals with isx may involve covalent ...

Design of Experiment (DoE) Studies to Optimize the Selective Dispersion-Flocculation of Indian Iron Ore Slime Using Guar gum Flocculants Dharmendr Kumar*, Venugopal Tammishetti, Kaustubh Joshi, Beena Rai and Pradip Tata Research Development and Design Centre, A division of Tata Consultancy Services 54-B, Hadapsar Industrial Estate, Hadapsar, Pune, Maharashtra, India -411013 *Email-ID ...

PEO was then tested as a selective depressant in the flotation of a commercial Au–Cu sulphide ore sample in which quartz was the major gangue mineral. This ore sample was ground to 90% passing 75 μm. Two sets of batch flotation tests were carried …

Chemometric Optimisation of a Copper Sulphide Tailings Flocculation Process in the Presence of Clays ... The presence of fine and ultra-fine gangue minerals in flotation plants can contribute to ...

Sulphide ore at the Nkomati Mine Concentrator Prepared by: Riyard Kahn (783709) Supervised by: Prof Vusumuzi Sibanda 28 January 2017 A dissertation submitted to the faculty of Engineering and the Built Environment, University of Witwatersrand in fulfilment of the requirements for the degree of Master of Science in Engineering

Commonly, hydrophobic flocculation is obtained by the addition of specific Keywords: Flotation, Floc-flotation, Silver sulphide, Scaven- collectors to render desired fine minerals hydrophobic ger concentrate and by slurry conditioning at a high shear rate.8,9 In some cases, non-polar oil is also used to enhance flocculation.

One of the important features in managing or treating sulfide fine tailings is separating solids from liquid by settling test. This thesis presents results of studied conducted on flocculation of Kaolin suspensions (a model tailings) and sulfide mineral tailings. Two polymers (PAM …

Lately, bacterial leaching methods gained further impetus with the introduction of biopreoxidation processes for the liberation of precious metals from sulfide-bearing minerals [54–56].If gold occurs in a finely disseminated form within the sulfide ore matrix, the economic viability of conventional gold extraction processes by cyanide leaching becomes less than marginal.

Keywords: Complex sulphide ore, Hallimond flotation, depression, activation, process water, tapwater, sulphate ions (SO4 ... as well as about the salinity and redox control of flocculation in such systems. Another prominent obstacle to utilizing process and tailing waters is the 51. presence of the reduced sulphur compounds (RSC) ...

LIST OF ORES AND THEIR NAMES SULPHIDE ORE PbS Galena HgS Cinnabar ZnS Zinc blende Cu2S Copper glance CuFeS2 Copper Pyrites (Chalcopyrite) FeS2 Iron pyrites or Fool's gold Ag2S Silver glance or Argentite Cu2S.Ag2S Copper silver glance Ag2S.Sb2S3 Pyrargirite or Rubisilver HALIDE ORE NaCl Rock Salt KCl Sylvine