The species sulfide and sulfites (SO 3 2−), bisulfite (HSO 3 1−), metabisulfite (S 2 O 5 2−), and sulfur dioxide (SO 2) have been widely used to control the flotation of sulfide minerals at moderately alkaline pH [133,146,147,148,149,150,151,152,153]. The reducing characteristics of this type of …
This report presents research and conclusions in improving mineral recoveries and minimizing waste production in the flotation of sulfide ores. Froth flotation is a widely used, inexpensive process for commercial separation of minerals from gangue and minerals from each other. Extensive research has demonstrated that …
This paper describes, in detail, the treatment of a copper/molybdenum sulfide ore (0.94% Cu and 0.05% Mo) using emulsified oil extender flotation (Ext-F) at laboratory scale.
The fundamental aspects of the flotation of sulphide minerals both in the absence and presence of thiol collectors are discussed in relation to their crystal structure, surface …
1.1 Three Periods of Flotation of Sulphide Minerals The one hundred year history offroth flotationmay be classified into three periods. The earliest stage is from the end ofthe 19th century to the early zo" century, i.e. surface flotation or bulk oil flotation. The natural hydrophobic sulphide minerals can be collected by the addition ofoil.
III.H.2.c Sulfide flotation. ... and sphalerite (ZnS). The other mechanism is electrochemical and gives an oxidation product that is the hydrophobic species adsorbed at the mineral surface. This is the primary mechanism for ... Alonso et al. [170] studied the feasibility of using vegetable oil as flotation collectors to recover coal from ...
In the DEHTT-treated chalcopyrite, the other S 2p 3/2 XPS peak at 161.04 eV was assigned to the S species of chalcopyrite. As shown in Fig. 10 (4) and Table 6, ... Lime use and functionality in sulphide mineral flotation: A review. Miner. Eng., 143 (2019), Article 105922, 10.1016/j.mineng.2019.105922. View PDF View article View in …
Rm~ mlnERIIL PRO(EBIn6 ELSEVIER Int. J. Miner. Process. 52 (1997) 81-120 The activation of sulphide minerals for flotation: a review N.P. Finkelstein * IMI Institute for Research and De~,elopment Ltd., Haifa, Israel Received 23 December 1996; revised 15 April 1997; accepted 9 July 1997 Abstract The chemistry of the activation of …
Sulfide flotation refers to the electrochemical process in which sulfide minerals are recovered by froth flotation, involving the transfer of electrons between different sulfide …
Modifiers in the flotation of sulphide minerals mainly include depressants and activators. A depressant is defined as a reagent which inhibits the adsorption ofa collector on a given mineral or adsorbed on the mineral to make the surface hydrophilic, and includes inorganic depressants such as lime, sodium cyanide,
Strong evidence of increased sulphide mineral oxidation, formation/precipitation of metal sulphate and replacement of collectors by sulphate ions at the mineral surface have been provided, which all result in decreased surface hydrophobicity (Ikumapayi et al., 2012b, Li et al., 2018) and therefore depression of …
1. Introduction. The continuous development of the global economy has resulted in a high demand for copper production and high copper consumption [1], [2], and exploitation and effective use of copper oxide mineral resources have attracted attention [3].Copper oxide deposits evolve from shallow copper sulfide deposits after long-term …
CHAPTER 7– FLOTATION OF SULPHIDE MINERALS. Contents: Xanthate adsorption. Oxidation reactions. Activation & depression. Flotation of chalcopyrite, galena, …
Sulfide minerals are floated using mostly xanthates, dithiophosphates, and other thio compounds as collectors. The mineral-collector interactions and the selectivity in separating individual sulfide minerals from each other and from the rest of the nonsulfide particles can be controlled by a careful adjustment of pH and oxidizing, reducing, and …
WO2000009268A1 PCT/US1999/018055 US9918055W WO0009268A1 WO 2000009268 A1 WO2000009268 A1 WO 2000009268A1 US 9918055 W US9918055 W US 9918055W WO 0009268 A1 WO0009268 A1 WO 0009268
corpus id: 62830861; flotation of sulfide mineral species with oils cross-reference to related applications
This invention is directed to the use of non-sulfur containing compounds as collectors in the froth flotation of certain mineral sulfide and metallic compounds. These non-sulfur-containing compounds may be from natural sources, such as vegetable oils, or synthesized commercial sources. These non-sulfide collectors can be used singularly, in …
NEW Patent CD for Flotation of sulfide mineral species with oils : Everything Else. Skip to main content.us. Delivering to Lebanon 66952 Update location All. Select the department you want to search in. Search Amazon. EN. Hello, sign in. Account & Lists Returns & Orders. Cart All ...
Recycling of process water in sulphide flotation: Part 3. Effect of calcium and sulphate species on sphalerite flotation to be submitted to Journal of Colloid and Interface Science. 4. Fatai K Ikumapayi, Maria Makitalo, Björn Johansson, K Hanumantha Rao, Recycling of process water in sulphide flotation: Part 4. Effect of calcium and sulphate ...
Apart from mineral flotation facilitated by collectors, collectorless flotation of sulfide minerals by electrochemical process has attracted research interest for decades [99]. The electrochemical treatment could enhance the surface hydrophobicity of sulfide minerals via formation of hydrophobic sulfur-rich species, e.g., metal-deficient ...
Flotation is a common mineral processing method used to upgrade copper sulfide ores; in this method, copper sulfide mineral particles are concentrated in froth, and associated gangue minerals are…
This invention is directed to the use of non-sulfur containing compounds as collectors in the froth flotation of certain mineral sulfide and metallic compounds. These non-sulfur-containing compounds may be from natural sources, such as vegetable oils, or synthesized commercial sources. These non-sulfide collectors can be used singularly, in …
This invention is directed to the use of non-sulfur containing compounds as collectors in the froth flotation of certain mineral sulfide and metallic compounds. These non-sulfur-containing compounds may be from natural sources, such as vegetable oils, or synthesized commercial sources. These non-sulfide collectors can be used singularly, …
In this study, isothermal microcalorimetric technique and soil enzyme assay techniques were employed to investigate the toxic effect of typical sulfide mineral flotation collectors on soil microbial activity and showed a significant adverse effect of butyl xanthate, butyl dithiophosphate, and sodium diethyldithiocarbamate. The sulfide mineral …
sulfide appears to have a pronouncedeffec t on boththe flotation response and the associated reaction mech anisms. Bornite (CusFeS4 ) is a widely occurring copper bearing mineral often found associated with other sulfides (i.e., chalcoc ite, chalc opyrite, covellite, pyrrhotite, and pyrite) . Ifthe flotation edge of a sulfide
Sulphide Mineral Flotation A New Insight Into Oxidation Mechanisms Alireza Javadi ISSN: 1402-1757 ISBN 978-91-7439-592-1 (tryckt) ISBN 978-91-7439-593-8 (pdf) ... very much lower amount of oxidized iron species in the mill discharge than mild steel medium (Huang and Grano, 2006). The use of iron grinding materials slightly depressed the f
The results of the flotation of Cu−Mo sulfide ores with seawater at pH 11 and natural pH presented in this investigation confirm the results presented in the studies by Castro 13 and Jeldres et ...
1.. IntroductionOver the last few decades, there has been considerable progress made in the understanding of how certain sulfide minerals can demonstrate natural or "collectorless" flotation under certain conditions (Heyes and Traher, 1977; Gardner and Woods, 1979; Traher, 1984).The purpose of this paper is to discuss some …
The activation of sulphide minerals with Cu2+ and other cations induces collectorless flotation, i.e. the minerals become hydrophobic and can be floated without …
Redox potential (Eh) control can play a critical role during sulphide mineral flotation by influencing the reactions on the surface of the minerals and consequently the flotation behaviour.
1. Introduction. In the mineral processing industry, lead-zinc sulfide ores are usually processed by froth flotation to enrich the purpose minerals [1].Flotation is a complex process, and the selective separation of minerals depends on the balance between the hydrophilic species and hydrophobic species on the mineral surface [2], …