There have been only a few studies on the effects of sulphate addition on the flotation of sulphide ores. For example, sulphate addition (63 mg/L) to a complex sulphide ore showed mixed results on the flotation of the major minerals: Pb recovery increased but Zn recovery decreased while Cu recovery slightly decreased.
Fluctuations in flotation kinetics: for example, a kinetics study into sulphide flotation showed that the flotation rate constant increases with temperature [Citation 86]. Deterioration of reagent ... Work by Cooke et al. on iron ore …
The most widely used sulphidizer is sodium sulphide, which is commonly used in the flotation of lead carbonate ores and also slightly tarnished sulphides such as pyrite and galena. In the sulphidization of ores containing …
Sulfide flotation refers to the electrochemical process in which sulfide minerals are recovered by froth flotation, involving the transfer of electrons between different sulfide minerals. This electron transfer affects the surface properties of the minerals, promoting or depressing their recovery.
Although the flotation of sulphide ores has been practised and studied for almost 75 years, the mechanisms that ... the processing of Climax molybdenum ore, which is of or even shape and dissolved ions concentrations, play an a finely disseminated nature, most of the loss in the important role in determining the flotation of fines of . ...
Abstract The authors discuss application of nitrogen–oxygen–sulfur heterocyclic agents as collectors and frothers in flotation of sulfide minerals. Efficient collectors are the compounds which contain nitrogen heteroatom and sulfur atom in pendent group: they can generate complex compounds, including chelate, with copper, antimony and other metals in …
In bulk flotation all of the sulphide minerals are collected and floated off together while the gangue remains unaffected and is rejected as tailing. Non- selective promoters serve very well for this purpose. ... and in general for sulphide or metallic minerals .01 to .20 lbs. per ton of ore are required. Flotation of metallic oxides and non ...
In this study, QEMSCAN® analysis is used to track the behaviour of the minerals during the flotation of a sulphide Cu-Co ore from the DRC. Mineral-specific size distributions and recoveries are studied, allowing to investigate the differences in flotation characteristics between copper sulphide and cobalt sulphide minerals. The changes in key ...
The sample ore used in this study was mainly the flotation waste that has been stored for more than 30 years comprising mixed sulfide minerals and partially oxidized sulfides.
Current flotation practice often involves the separation of three or four sulphides from the same …
A sulphide ore may experience various oxidation processes either during in-situ weathering or throughout various stages of extraction and processing, including mining operations, stockpiling, crushing, milling, and flotation (Jacques et …
International Journal of Mineral Processmg, 38 ( 1993 ) 157-175 157 Elsevaer Science Publishers B V, Amsterdam Influence of grinding method on complex sulphide ore flotation: a pilot plant study K.S. Eric Forssberga, T.V. Subrahmanyamb* and Leif K. Nilssona ~Dzvtston of Mmeral Ppoce~smg, Lulea Untverstt)' of Technology, S-951 87 Lulea, Sweden …
Sulfide ore flotation methods are extremely important in the mining industry. Efficient extraction of valuable metals from low-grade ores helps maximize resource utilization and reduce waste. Compared with traditional processing technologies, the combination of flotation, gravity separation, magnetic separation and other processes has higher recovery rates, thus …
Froth flotation is widely used for concentration of base metal sulphide minerals in complex ores. One of the major challenges faced by flotation of these ores is the ever varying grade and mineralogy. This therefore calls for a continual characterisation and optimisation of flotation parameters such that concentrator performance as a whole is always maintained. In this study, …
Several nickel processing operations have practiced hydrometallurgical processing of nickel sulfide flotation concentrates or whole ore at commercial scale and these are summarized in Table 4. It can be seen in Table 4 that there is wide variability in terms of the feedstocks processed, finished nickel products and leaching technology employed ...
Today, about 400 million tonnes of sulphide ore is treated annually by flotation process worldwide. M/s Hindustan Zinc Ltd. (HZL), a leading lead-zinc mining and smelting company in India has experienced a spect- acular growth from the time of its inception. Starting from a single 500 MT per day lead-zinc mine at Zawar, HZL has expanded its ...
According to the electrochemical theory of flotation, in sulfide ore flotation system, anode reaction is that the collector (xanthate) reacts with sulfide ore minerals to form the metallic salt collector or dimer of collector (dixanthogen) while the cathode reaction is that the oxygen in the pulp is reduced by receiving the electrons given by the anode reaction.
This paper presents the study of Raman spectroscopy for online detection of enriched sulfide ore minerals from froth flotation. The Raman instrument with a custom-made probe connector allowed for the recording of good quality Raman spectra during froth flotation and for the identification and analysis of the valuable minerals levels ...
Behaviour and mechanism of collectorless and collector-induced flotation of sulphide minerals in various flotation systems are also discussed. The example of electrochemical flotation separation of sulphide ores shows an industrial …
Batch flotation tests on the Au–Cu sulphide ore sample were conducted in a laboratory Wemco flotation machine with a 2-L flotation cell at the University of Alberta. Prior to flotation, 1 kg of the ore sample was ground with 700 mL of Edmonton tap water in a mild steel ball mill to 90% passing 75 μm.
The sulfide ore flotation process can be studied by both chemical and electrochemical phenomena considering the interfacial energies. A broad application of this process in industrial field is the ...
Nickel is an important raw metal material in industry, which has been identified as a strategic mineral resource by the Chinese Ministry of Land and Resources. Nickel sulfide ore accounts for 40% of all nickel ores worldwide. However, magnesium silicate gangue minerals in sulfide nickel ores, particularly serpentine, pose significant challenges to the flotation of nickel …
Copper sulfide ores frequently co-occur with pyrite, presenting a significant challenge for their selective separation during beneficiation processes. Despite advancements in flotation technology, there remains a critical need for efficient methods to enhance copper recovery while suppressing pyrite interference, particularly without compromising the …
Selective flotation of sulphide minerals from complex ore is dependent on the several parameters such as: type and dosage of collectors, galvanic interactions and activation by dissolved ions 5,6 ...
sulphide ore the galena can be floated first at higher using cyanide to prevent sphalerite and …
The common flotation processes of lead-zinc sulphide ore are mainly: priority flotation, mixed flotation, equal flotation, fractional-speed branch flotation and separation potential flotation.
The sulfidization-amine flotation method is commonly used for the beneficiation of zinc oxide ores. Lanping zinc oxide ores contains 8.40% zinc, with the main mineral being smithsonite; additionally, they have a high mud content. Conventional sulfidization–ammonium flotation presents a low flotation index and unsatisfactory flotation froth. A new open-circuit …
The suggested mechanisms for flotation of sulphloes with and without thiol collectors are …
Desliming preceding flotation is an industrial practice established over 60 years ago, introduced in the USBM process for the iron ores cationic reverse flotation (Clemmer, 1947).A high dispersion degree of the particles in the pulp is essential for effective desliming, a requisite for the selectivity in most non-sulphide flotation systems.
Surface chemistry investigation of froth flotation products of lead-zinc sulfide ore using ToF-SIMS and multivariate analysis. Sep. Purif. Technol., 254 (2021), Article 117655, 10.1016/j.seppur.2020.117655. View PDF View article View in Scopus Google Scholar. Leiva …