-
- دوشنبه تا شنبه: 10:00 - 16:00 / یکشنبه تعطیل است
In this research, the factors limiting performance have been identified and a new process has been devised that raises recovery significantly. The process exploits the particle …
به خواندن ادامه دهید
Fine serpentine, however, causes problems in flotation processes, for example, by increasing the viscosity of the pulp. ... It is obvious that there are still many unknown reactions and processes in nickel separation, and in sulphide flotation generally. They include the interaction of ions and process iron, for example. Viscosity effects are ...
به خواندن ادامه دهید
At present, scholars mainly study the relationship between nanobubbles and useful minerals, often ignoring the influence of bubbles on fine gangue minerals. When selecting nickel sulfide ore, scholars often faced with mudded and irrepressible serpentine, which seriously affects the quality of the concentrate. This mudded serpentine mineral often enters products …
به خواندن ادامه دهید
Flotation studies conducted on 60 g samples showed that the sulphides responded to flotation with maximum grades of up to 6–7 wt.% nickel being achieved. Recoveries were approximately 50% on a sulphide basis and it was determined that the low nickel grades were due to the entrainment of mag-netite fines.
به خواندن ادامه دهید
Keywords Flotation, nickel sulphide, serpentine, lizardite, chrysotile, carboxy methyl cellulose, slime dispersion, salt water. INTRODUCTION Western Mining Corporation mines several nickel sulphide deposits in the Eastern Goldfields region of Western Australia, north and south of Kalgoorlie. Concentrates are railed to the flash smelter at ...
به خواندن ادامه دهید
The extraction of nickel from sulfide ores typically commences with comminution and flotation to produce a sulfide concentrate, which is subsequently smelted and pyrometallurgically refined (termed converting) to produce a …
به خواندن ادامه دهید
In anticipation of future demands, a comprehensive understanding of the chemical and mineralogical characteristics of nickel-bearing minerals is a prerequisite to devising effective nickel beneficiation methods. Of particular importance are markers in the mineralogy of the flotation concentrate that inform beneficiation strategies to improve concentrate grades, …
به خواندن ادامه دهید
Sea water has been used in flotation plants, showing a promising way to save fresh water usage. Previous studies indicated that divalent salts in sea water played negative roles in chalcopyrite…
به خواندن ادامه دهید
In order to improve the flotation of nickel sulphides, sodium hexametaphosphate, sodium silicate, carboxymethyl cellulose (CMC), and other agents are used to disperse serpentine coating from sulphide surfaces in the flotation of the Jinchuan deposit and other nickel ores in China ( Kirjavainen and Heiskanen, 2007; Lu, et al., 2011).
به خواندن ادامه دهید
Nickel sulfide ore is the most important nickel ore resource in the world at present and is commonly sorted by bubble flotation (Long et al., 2022; Tian et al., 2022). The nickel minerals of the Jinchuan copper-nickel sulfide ore are mainly nickel-pyrite and contain abundant magnesium-bearing silicate gangue (Bo et al., 2018a).
به خواندن ادامه دهید
The process exploits the particle size dependence of nickel sulphide flotation and the different ways that pH change and pulp density influence the response of coarse and fine particles. ... It has been suggested (Anon, 1977, Mani et al., 1997), however, that it can also act as a dispersant for serpentine minerals, though we are not aware of ...
به خواندن ادامه دهید
The processing of ultramafic ores requires fine grinding, which can result in slime-coating of the nickel-bearing mineral, pentlandite, by the phyllosilicate gangue mineral, serpentine. This ...
به خواندن ادامه دهید
The deterioration of the flotation performance of Cu-Ni sulfide suggested that the hetero-coagulation was not the only factor affecting the flotation of Cu-Ni sulfide containing serpentine, high ...
به خواندن ادامه دهید
In case of nickel sulfide flotation, the pulp pH is regulated using soda ash (Na 2 CO 3) or lime (Ca ... mechanisms — all of which facilitate particle-to-bubble attachment—have been proposed for improved pentlandite flotation and less serpentine entrainment in froth for saline vs fresh process water: electrical double layer compression, ...
به خواندن ادامه دهید
Serpentine (Mg 3 Si 2 O 5 (OH) 4), a phyllosilicate mineral abundant in magnesium, commonly coexists with sulfide ores, especially copper-nickel sulfide deposits, as the gangue composition (Zhou and Feng, 2015).To separate the target minerals from gangue minerals, flotation, which mainly bases on the differences in the natural or induced hydrophobicity of different …
به خواندن ادامه دهید
Flotation tests revealed that the stirred tanks with two impellers had an advantage over those with one impeller in intensifying agitation pretreatment, and the higher agitation …
به خواندن ادامه دهید
In this study, a new type of non-ionic dispersants, Pluronic triblock copolymers were examined with an objective of improving the flotation of ultrafine pentlandite (a nickel sulphide...
به خواندن ادامه دهید
Serpentine, a magnesium silicate mineral with positive surface charge in many sulfide ores around the world, usually deteriorates the flotation behavior by covering the target mineral surface. In this paper, the effect of surface potential regulation on serpentine flotation was revealed by flocculation experiments, zeta potential measurements, infrared spectrum …
به خواندن ادامه دهید
Researchers have tried to improve nickel laterite flotation recovery by using a number of feed preparation techniques. ... However, this work is not included in Table 1 as the ore they used was indeed a nickel sulphide, but the authors had classified it as lateritic probably because of its low grade. Table ... serpentine, garnierite, and chlorite.
به خواندن ادامه دهید
The need for desilicating flotation concentrates of nickel sulfide ores is urgent but presents several challenges: (1) serpentinite exhibits natural floatability and can transform into talc during flotation, further enhancing its …
به خواندن ادامه دهید
The synergistic mechanism of acidified water glass (AWG) and carboxymethyl cellulose (CMC) in the flotation of the nickel sulfide ore was studied through flotation tests, zeta potential ...
به خواندن ادامه دهید
In the flotation process of serpentine-containing copper-nickel sulfide ore, serpentine slime coatings significantly reduced the flotation performance of copper-nickel …
به خواندن ادامه دهید
In the processing of nickel sulfide ore, serpentine may report to the flotation concentrate through attachment to the valuable minerals as "slime coatings". The flotation behavior and surface properties of talc and serpentine are different. ... in neutral or weak alkaline pH ranges where nickel sulfide flotation is conducted, serpentine has ...
به خواندن ادامه دهید
ELSEVIER Int. J. Miner. Process. 43 (1995) 209-234 HITERnlITIOIliBaL JOURML OF mlnERgt PRO(ESSln6 The selective flotation of pentlandite from a nickel ore G.D. Senior, W.J. Trahar, P.J. Guy CSIRO Division of Mineral and Process Engineering, Box 312 Rosebank MDC, Clayton, Vic. 3168, Australia Received 14 June 1994; accepted after revision 15 …
به خواندن ادامه دهید
It was found that at low temperatures, the Fe–Ni–S phase was submicron in nature and heating to temperatures between 1050 and 1100 °C allowed for the growth of the particles, due to the increased sulphide mobility associated with the formation of a liquid sulphide matte phase, containing dissolved oxygen.Flotation studies conducted on 60 g samples showed that …
به خواندن ادامه دهید
The pressure for saving water by closing the water loops in mineral processing is increasing continuously. The drivers for higher recirculating rates include water scarcity in dry areas, environmental legislation that is becoming stricter in most countries, limitations set for wet tailings management and the increased demands for social licenses to operate. At the same …
به خواندن ادامه دهید
Therefore, PAAS can be used as an efficient dispersant of serpentine in copper-nickel sulphide ores flotation system. Gum Arabic (GA) is derived from the trunk exudate of GA legume, and its main ...
به خواندن ادامه دهید
Serpentine (Mg3Si2O5(OH)4) is a common magnesium-bearing silicate gangue in sulphide ores [5], and flotation of sulphide ores associated with serpentine is complex, owing to the interactions between sulphide minerals and serpentine, especially in the flotation of copper-nickel sulphides [6].
به خواندن ادامه دهید
ABSTRACT The effects of configuration of the stirred tank and energy input on the flotation performance of nickel ores were systematically investigated in this paper. Flotation tests revealed that the stirred tanks with two impellers had an advantage over those with one impeller in intensifying agitation pretreatment, and the higher agitation speed led to a better flotation …
به خواندن ادامه دهید
Effect of a novel phosphate on the flotation of serpentine-containing copper-nickel sulfide ore. Miner. Eng., 150 (2020), Article 106276, 10.1016/j.mineng.2020 ... The role of carboxy methyl cellulose in the flotation of a nickel sulphide transition ore. Miner. Eng., 5 (1992), pp. 381-395, 10.1016/0892-6875(92)90218-X. View PDF View article ...
به خواندن ادامه دهید
In the flotation process of serpentine-containing copper-nickel sulfide ore, serpentine slime coatings significantly reduced the flotation performance of copper-nickel sulfide. Sodium phytate is a highly effective dispersant for MgO control in …
به خواندن ادامه دهید
Nickel is sourced from sulphide and laterite ores. While 70% of the nickel resources are contained in laterites, these ores are often complex and expensive to treat using conventional methods. ... with less amount of serpentine, olivine, and clays. Nickel is mainly carried by goethite in the I and L laterite samples. The size fraction of −300 ...
به خواندن ادامه دهید
This study investigated the effect of oxygen and micro-cracking on the flotation of low grade nickel sulphide ore. The ore treated contained serpentine minerals which have a history of being difficult to process efficiently. ... These minerals can affect the flotation process, and the typical visible problems of serpentine mineral in the ...
به خواندن ادامه دهید
The process exploits the particle size dependence of nickel sulphide flotation and the different ways that pH change and pulp density influence the response of coarse and fine particles ...
به خواندن ادامه دهید
In the flotation process of serpentine-containing copper-nickel sulfide ore, serpentine slime coatings significantly reduced the flotation performance of copper-nickel sulfide.
به خواندن ادامه دهید