modifiers for chalcocite flotation

NIOSHTIC-2 Publications Search - 10004717 - The Flotation ...

04 Flotation Modifiers - Free download as Powerpoint Presentation (.ppt), PDF File (.pdf), Text File (.txt) or view presentation slides online. Scribd is the world's largest social reading and publishing site.

Adsorption of dextrin onto sulphide minerals and its ...

Depression of pyrite in porphyry copper flotation Ian Wark Research Institute Australian Research Council Special Research Centre For Particle and Material Interfaces M. Zanin and S. Farrokhpay Case Study. High pyrite recovery in Cu/Mo operation 4800 tph d80 = 150 µm Polishing Mills FINAL TAIL SCAVENGER FINAL CON CLEANER

Possibility of sodium cyanide elimination from a flotation ...

found that chalcocite flotation was significantly depressed by. the presence of bentonite, while the flotation of chalcopyrite. ... ash as pH modifiers on the flotation of a copper ...

Froth Flotation Handbook - Mineral Processing & Metallurgy

Possibility of sodium cyanide elimination from a flotation process . Ahmad K. CDarban. 1. Abstract: - In base metals concentration using flotation technique, pyrite decreases the quality of metal concentrates and increases the amount of sulfur compounds.

Flotation of Copper Sulfide Ores - PDF Free Download

The flotation of chalcocite, bornite, chalcopyrite, and pyrite has been studied in a microflotation cell in which the potential of a bed of the mineral particles could be controlled electromechanically. The ethylxanthate-induced flotation of each mineral is markedly dependent on electrochemical. The Flotation of Chalcocite, Bornite ...

(PDF) Managing clay minerals in froth flotation—A critical ...

The major constituents of the Inco matte, chalcocite (Cu2S) and heazlewoodite (Ni3S2), are separated by differential flotation with diphenylguanidine as collector. To select an effective organic depressant, many dextrins were tested and tapioca dextrin 12 was found to have an exceptional affinity towards heazlewoodite surface at a particular pH of the mineral suspension. A new reagent system ...

Flotation on the copper ore processing | All details about ...

The basic factors, principles and variables affecting froth flotation are enumerated in condensed form below:. Ore. (a) Mineralogical character. (b) Fineness of grinding. (c) Method of grinding. Agents. (a) Principal flotation agent. (“Oil”) α Character.

Dextrin as a non-toxic depressant for pyrite in flotation ...

Lime in flotation, as a pH modifier, can also regulate not only collector adsorption, but also the effect of other commonly-used depressants such as sodium sulphide or sodium cyanide (Yoon, 1981, Ghiani et al., 1984, Wang and Forssberg, 1996). Cyanide acts by dissolving copper from the surface of the activated sulphides, thus preventing ...

04 Flotation Modifiers | Acid | Ph

The flotation results presented in this work agree with those of a previous study that demonstrated the effect of Mg 2+ and Ca 2+ ions on the respective floatability of molybdenite and chalcopyrite in the absence of flotation reagents (Hirajima et al., 2016).

Flotation Conditioners -Modifiers -Activators -Depressants

Dextrins as selective flotation depressants for sulfide minerals 275 RESULTS AND DISCUSSION The results of flotation of chalcocite and separately galena, both with xanthate and dextrins are presented in Figs 1-2, respectively. They show that the depression of flotation of the investigated sulfides appears at a rather high, about 20 kg/ton,

Depression of pyrite in porphyry copper flotation

and iron) sparked noticeable peaks of froth flotation usages in large scales in 1960 and 1980 [24]. There are six types of reagents used in froth flotation; these are activators, depressants, collectors, flocculants, frothers and modifiers.

Differential Flotation of Matte with Dextrin - Electrokinetics

Richardson and Walker showed that the flotation of chalcocite, bornite, chalcopyrite and pyrite with potassium ethyl xanthate is controlled by the conditioning potential, similar to earlier findings by Heyes and Trahar. The active surface entities for chalcocite and bornite

pH Ranges for Sequential Cu Pb Zn Flotation | Separation

By modifying Flotation pH to create kinetic/speed differences between the metals and achieve sequential flotation and take full advantage of the hydrophobic nature of each mineral, it is best to first lower the pH and see about recovering copper.

FROTH FLOTATION : RECENT TRENDS Flotation of Sulphide …

International Journal of Sciences: Basic and Applied Research (IJSBAR) (2017) Volume 34, No 2, pp 145-165 . 146 . This has allowed companies to sustain their mining operations and the livelihood ...

Centenary of Flotation Symposium - nanoparticles.org

In the rougher flotation prior to regrinding, high chalcopyrite and chalcocite recovery were obtained in conjunction with high pyrite flotation recovery due to the activation of pyrite by copper ions during primary grinding. The rougher flotation concentrate was reground in a rod mill before cleaner flotation.

International Journal of Sciences: Basic and Applied ...

In the selective depression of sulphide minerals a wide variety of modifiers are employed. Any advances in the effective use of polysaccharides in such applications will, however, depend on the understanding of the interaction mechanism. In industrial sulphide flotation systems, dextrins have been used as depressant due to their low molecular weight, highly branched structure and high hydroxyl ...

DEXTRINS AS SELECTIVE FLOTATION DEPRESSANTS FOR …

The flotation of chalcocite, bornite, chalcopyrite, and pyrite has been studied in a microflotation cell in which the potential of a bed of the mineral particles could be controlled electromechanically. The ethylxanthate-induced flotation of each mineral is markedly dependent on electrochemical potential, with the recovery changing from 0 to ...

The depression of pyrite in selective flotation by ...

Choice of modifiers and their effect on flotation In most operating plants, lime is used as a pH modifier as well as for the depression of pyrite during the cleaning operation. Only in a small number of plants, an alternative pyrite depressant is used. ... If the copper concentrate is chalcocite or other minerals such as bornite, covellite ...

Basic Principles & Variables Affecting Froth Flotation

1 1 Froth Flotation – Fundamental Principles Froth flotation is a highly versatile method for physically separating particles based on differences in the ability of air bubbles to selectively adhere to specific mineral surfaces in a

Floatability of molybdenite and chalcopyrite in artificial ...

These principles generally involve the chemical and electrochemical aspects considered in flotation, which include the use of various reagents namely, collectors, frothers and modifiers such as ...

Optimization of reagent dosages for copper flotation using ...

The feasibility of using sodium sulfide as the sole modifier for the flotation of Xinhua molybdenite ore was examined. The potential mechanisms involved in the different flotation systems were ...

Mineral Flotation - International Mining

Flotation Conditioners -Modifiers -Activators -Depressants. ... These four types of reagents are basic for use in a flotation circuit. Modifiers ... It may be found in association with other copper bearing minerals like Bornite and Chalcocite or non-copper bearing minerals like Galena, Zinc, Silver and Gold. To start with, let’s keep this simple.

Flotation of Xinhua molybdenite using sodium sulfide as ...

beneficiation plants, all adopting froth flotation technology. The phenomenal progress is a result of HZL's emphasis on research and development with an objective to improve the efficiency and to optimize performance, and to seek innovative modern technology and control systems in their flotation …

OPTIMISATION OF THE FROTH FLOTATION PROCESS OF …

For more than a century now, flotation has been at the heart of the mineral processing industry. In this month’s SPOTLIGHT FEATURE ARTICLE, direct from the November issue of INTERNATIONAL MINING magazine, John Chadwick examines new technologies and applications from some of the key players in mineral flotation, a technique that is so important to the global industry.

Lime use and functionality in sulphide mineral flotation ...

It is shown that dextrin is an effective depressant for pyrite in flotation of copper in the chalcopyrite ore at pH 8, but the pulp needs to be aereated in order to promote the surface oxidation ...

Optimisation of Spodumene Ore Flotation using Zeta Potentials

The depression of pyrite in selective flotation by different reagent systems – A Literature review. ... 2.1. pH modifiers. ... G.W. WalkerThe flotation of chalcocite, bornite, chalcopyrite and pyrite in an electrochemical flotation cell.

(PDF) A Review of the Flotation of Copper Minerals

important part of the flotation process. In commercial plants, the control of reagent additions is the most important aspect of the flotation strategy[6]. Reagent schemes used for the treatment of porphyry copper and copper-molybdenum ores are relatively simple and usually involve lime as a modifier, xanthate

The separation of chalcopyrite and chalcocite from pyrite ...

Methods of flotation. Methods of flotation may be classified for purposes of study into three varieties, on the basis of the force that acts to buoy the mineral of metallic luster, as: skin-flotation methods, oil-flotation methods, froth-flotation methods.. Skin-flotation. Skin is a methods depend for their operation on the comparative reluctance of the minerals of metallic lustre in an ore to ...

effect of ph on bornite flotation

Cupriferous mica, chalcocite, bornite, chalcopyrite, malachite and pseudomalachite were the ... flotation procedure since all copper minerals respond differently to different flotation conditions. Further intensive study of the cupriferous mica is recommended to gain a better ... 2.2.3. MODIFIERS. ...

1 Froth Flotation – Fundamental Principles

Foam flotation is a process by which collectors condition a mixture of water (suspension) to make the copper minerals water repellent while leaving the non-Cu minerals hydrophilic.Flotation is made from finely ground copper ore in flotation cells.The previous page explains the types of copper ore that exist and the extraction process that results in finely ground copper ores.