The Effect of Oxidation on the Flotation Behaviour of Nickel-CopperOres S Kelebek 1 ABSTRACT Surface oxidation is one of the most imponant factors that influence the flotation selectivity and recovery in the processing of complex sulphide or It is an inherent ,
pyrrhotite (241 %) and concentrate pentlandite and chal-copyrite (both only 37 %), but the pyrrhotite contains about 14 % of the total nickel content in the ore, as can be inferred from the composition in Table 1 Rejecting the total pyrrhotite content therefore implies that the overall recovery will, by such process design, be capped below 86 %
Optimisation of Reagent Addition during Flotation of a Nickel 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
However, arsenic bearing nickel ore may be treated by blending with 'clean' ore sources, to produce a blended feedstock which the mill and smelter can handle with acceptable recovery The primary problem for treating nickeline in conventionally constructed nickel mills is the specific gravity of nickeline versus that of pentlandite
One rejects primarily monoclinic pyrrhotite that is magnetic After a secondary FLOTATION OF CHALCOPYRITE, PENTLANDITE, PYRRHOTITE ORES 1 1 magnetic separation and regrinding to liberate most of the chalcopyrite and pentlandite, a two stage flotation separation is done to produce a "copper- nickel concentrate" before the pyrrhotite is rejected
The separation of pentlandite from chalcopyrite, pyrrhotite and gangue in nickel projects throughout the world V Lawson, G Hill, L Kormos, G Marrs AusIMM Mill ,
passed to two parallel rougher scavenger flotation, and then were cleaned, while the overflows of the only second stage cyclones passed to the flotation column As a result, a substantial increase in the nickel recovery was achieved (Senior and Thomas, 2005) Other approaches proposed to improve flotation of pentlandite minerals
of SHMP could restore the recovery of pentlandite which had been depressed by lizardite At pH value 9, where Àotation of nickel sul¿de ore is routinely performed, the recovery of depressed pentlandite increased from 31% to 88% when 100 mg/dm3 SHMP had been added
mineral separation for nickel transsportbe mineral separation for nickel mineral separation for nickel Separation of pentlandite and nickel arsenide minerals by aeration Separation of pentlandite and nickel arsenide minerals by aer ation conditioning flotation separation of mineral from crushed ore nickel gnducnjsin how nickel is separated from mineral expertswingin Nickel mineral .
In this paper, an alternative beneficiation process was developed to recover nickel minerals from low-grade weathered or The studied sample, 03% Ni grade, is essentially composed of nickel sulfides (pyrrhotite and pentlandite); magnetite and silicates (mostly talc and amphibolites) are the primary gangue minerals
flotation cells had deteriorated and, affected stability of the operations due to frequent repairs on these units with a resultant loss of recovery In order to improve the nickel recovery, the condition of the two critical flotation banks warranted their replacement as they were beyond the economic life and compromising plant recovery
May 05, 2010· Froth Floatation Process , The scavenger cell froth  is usually returned to the rougher cells for additional treatment, but in some cases may be sent to special cleaner cells,
Flotation of low grade Ni ores with serpentinite host rock tend to yield low recoveries of Ni with high MgO contents in the concentrate The recovery can be enhanced by optimizing the sub-processes in the pulp and in the froth The new OF-100 flotation cell has been designed to be adaptable to different feed fineness (Coarse, Fine) Due to the properties of the serpentine group minerals many .
The selective flotation of pentlandite from a nickel ore ScienceDirect Nickel sulphide ores containing pentlandite, pyrrhotite and talc have traditionally been treated by bulk sulphide flotation, an approach which seeks to maximise nickel recovery and talc rejection but which does not reject pyrrhotite
The overall nickel recovery is around 60-70% with slime and coarse recovery being much lower (Senior and Thomas, 2005) The separation of pentlandite from serpentine by froth flotation has been .
nickel recovery has been achieved In 2005, after implementing acid treatment on the coarse ﬂotation stream, the overall nickel recovery achieved was y70% with a 19%Ni grade for a normal ore type (Senior and Thomas, 2005) To further improve the nickel ﬂotation at Mt Keith, copper sulphate was tested in an attempt to activate pentlandite .
The optimum nickel and pentlandite recovery was achieved at particle size of 6473 µm milled for 15 h, pH of 965 and using a new flotation cell Also, collector recovered more nickel and pentlandite contents compared to PAX and SIBX collectors when optimum parameters of particle size, milling time, pH and flotation cell were considered
ABSTRACT Efficient separation of minerals is the essence of mineral processing Separation of hexagonal pyrrhotite in processing of NiCu sulphide ores was investigated together with particle size effects with respect to selective flotation recovery of pentlandite and nickel The recovery by size response was compared
Define pentlandite pentlandite synonyms, pentlandite pronunciation, pentlandite translation, English dictionary definition of pentlandite n A yellowish-brown nickel iron sulfide that is the principal ore of nickel n a brownish-yellow mineral consisting of an iron and nickel sulphide in cubic.
Jul 12, 2016· FIG 2 presents results for the cumulative recovery of pentlandite and pyrrhotite in the rougher flotation of the same nickel-copper ore as used in Example 1, in which Na 2 SO 3 was added with D-912 into the rougher The ore was ground in the same manner as in Example 1, including the 5 g/t addition of the collector (PAX) and the 400 g/t .
The pilot plant experimental scope included over 50 tests A grade recovery curve for each stream was developed, as well as information on the effect of ore type, feed rate, wash water, air flow, collector and frother on the performance of the cell The single StackCell was able to achieve nickel recoveries of 168% and 165% on the Rougher
nickel benefication plant - print-flyerscoza High-performance reagent modes for flotation recovery IOPscience increase in the recovery of copper, nickel and PGM in the flotation of the low-sulfide platinum low-sulfide ore sulfides content is 1 3% and the average content of PGMs is and pyrrhotite predetermines the use of gravity-flotation beneficiation plant Pechenganikel and
Abstract The one-step electroleaching-electrowinning of nickel from violarite and pentlandite iron-nickel sulphide concentrates has been demonstrated using an electrochemical cell fitted with a ,
pentlandite in the ore occurs as exsolutions in the pyrrhotite and the grain sizes ranges from 8 to 38µm about 25% of the nickel bearing pentlandite is medium grained and subhedral This kind of pentlandite occurs along the cracks of pyrrhotite or as inclusions in pyrrhotite The rest of pentlandite present is disseminated in the gangue matrix
Keith nickel operation in Western Australia that treats a low grade pentlandite ore the 4 , Recovery must be economic for the operation to continue but owners reported nickel recovery of only 60% in 1994 the year after start up, increasing to , initial objective of the test work was to investigate whether the G-Cells could increase nickel .
Froth flotation is a process for selectively separating hydrophobic materials from hydrophilicThis is used in mineral processing, paper recycling and waste-water treatment industri Historically this was first used in the mining industry, where it was one of the great enabling technologies of the 20th century
The selective flotation of pentlandite from a nickel ore Bulk flotation An efficient procedure for nickel recovery is to combine copper sulphate to activate pentlandite with guar gum to depress talc This is the method which has been used for the flotation of nickel ores in industry and which we have termed the "standard bulk float"
Aug 15, 2018· The recovery increased to 88% from 80% when the conditioning time was increased from 3 min to 40 min at a conditioning speed of 2800 r/min The results in Fig 5(b) illustrate that with the increase of nickel recovery, the grade of nickel decreased The longer conditioning time produces a vastly superior nickel grade-recovery relationship
Pentlandite is a rather pale brassy yellow metallic sulphide, one of the most important nickel ores, and a primary mineral in many ultramafic rocks It is usually found associated, and commonly finely intergrown, with pyrrhotite , and rarely shows microscopically visible crystals
Recovery of Nickel and Pentlandite in a Low Grade Nickel Sulphide Ore Using Optimum Flotation Parameters B D Ikotun, F V Adams & A G Ikotun , Flotation cell is made up of 25 L removable .