هل ستصبح شريكنا القادم ؟
The mineral system characteristics of the Sudbury Ni-Cu-Co-PGE sulfide ore deposits. Peter C. Lightfoot, in Nickel Sulfide Ores and Impact Melts, 2017 The principal Cu-Fe-S minerals. The principal Cu-Fe-S minerals are chalcopyrite, cubanite, and bornite (Table 4.2).Chalcopyrite accounts for by far the major part of the Cu in the Sudbury deposits.
اقرأ أكثر
Abstract. The roasting of sulfide ores and concentrates is one of the most important steps in pyrometallurgical metal production from primary raw materials, due to …
اقرأ أكثر
Ores Sulfides. Canadian ores are sulfides containing nickel, copper, and iron. The most important nickel mineral is pentlandite, (Ni, Fe) 9 S 8, followed by pyrrhotite, usually ranging from FeS to Fe 7 S 8, in which some of the iron may be replaced by nickel. Chalcopyrite, CuFeS 2, is the dominant copper mineral in these ores, with small amounts …
اقرأ أكثر
The influence of ore mineralogy and ore texture on flotation response was studied for 29 samples from the main mineralised zone at Pit 3 of the Nkomati Ni mine, through laboratory scale flotation ...
اقرأ أكثر
2007). Concentrate smelting is carried out either by roasting- electric furnace smelting or via flash smelting and the key process steps in both processes are presented in Figure 2; the key principles of both methods are covered in detail elsewhere (Crundwell et al. 2011c, 2011f). The production details of both
اقرأ أكثر
Contribute to redmik40/sbm development by creating an account on GitHub.
اقرأ أكثر
This allowed investigating the mass-dependent fractionation of Ni isotopes during the Ni-laterite ore smelting and refining. ... Economic Ni resources are found either in magmatic sulfide deposits, where the principal ore mineral is pentlandite ((FeNi) 9 S 8) (Naldrett et al., 1979, Hoatson et al., 2006), or in laterite-type ores deposits where ...
اقرأ أكثر
In batch tests on an ore containing pentlandite, pyrrhotite, pyrite and talc the procedure rejected 57% of the iron sulphides and 98% of the talc and recovered 81% of the nickel in a concentrate assaying 16.5% Ni. ... ores frequently contain high levels of pyrrhotite which if concentrated with pentlandite raise SO2 emissions during smelting ...
اقرأ أكثر
Nickel ore refers to the naturally occurring rocks or minerals that contain significant amounts of nickel. Nickel is a chemical element with the symbol Ni and atomic number 28. It is a silvery-white metal with a …
اقرأ أكثر
There are two commercial classes of nickel ore, the sulfide ores (pentlandite and pyrrhotite) and silicate-oxide. Most nickel is produced from the sulfide ores, and the two largest producers, Canada and the Russian Federation, account for 20–25% each of total annual production, which was 784.82 thousand tones in 1988.
اقرأ أكثر
Thermodynamically possible reactions in the Ni-S-O and Fe-S-O systems were proposed. and the changes in Gibbs free energy at 298 K, 773 K, 923 K and 1073 K were calculated. Kinetic analysis of ...
اقرأ أكثر
The aim of the study was to investigate whether there is any compositional variation of pentlandite particles from the flotation concentrate samples and selected …
اقرأ أكثر
The mineral system characteristics of the Sudbury Ni-Cu-Co-PGE sulfide ore deposits. Peter C. Lightfoot, in Nickel Sulfide Ores and Impact Melts, 2017 Cobalt. Pentlandite is the principal host for the bulk of the cobalt in the Sudbury ores (Naldrett, 1961), and there is a range in Ni/Co ratio depending on whether the pentlandite was formed in a contact or …
اقرأ أكثر
matte smelting-leaching (4). Because of long processing times en countered with conventional treatment of PGM sulfide concentrates and the ultimate probable dependence on a foreign smelter and refinery to produce the platinum group metals, alternative processing of Stillwater Complex concentrates is being considered.
اقرأ أكثر
Generally, floated pentlandite concentrate (often accompanied by violarite pyrrhotite/mss and other sulfide minerals) is used as feedstock in the flash smelting …
اقرأ أكثر
Flotation separation of pentlandite from pyrrhotite using sulfur dioxide-air conditioning (1988) ... in particular for processes involving flotation and smelting, leading to significant cobalt losses to mine tailings or smelter slags. ... with a particular focus on ore mineralogy which exerts a significant control over ore processing behaviour ...
اقرأ أكثر
The ore contained cobalt-bearing pentlandite as the predominant Ni-Co mineralization, with Kaolinite-serpentine group, magnesite and hydrotalcite the predominant oxide and pyrrhotite as the predominant sulfide gangue minerals. ... The matte-smelting process and ancillary processes involves a combination of grinding, froth flotation, …
اقرأ أكثر
Coupled with the mature smelting technologies, nickel sulfide ore is currently the most important source of mineral production in the nickel industry, ... The controlled oxidation of feed sulfide minerals demonstrated that the hydrothermal oxidation of pentlandite occurs via violarite and subsequently vaesite. Under the conditions …
اقرأ أكثر
The specific gravity of iron-nickel pyrite is 4.5-5 g/cm3. It has no magnetic properties. In 90% of all copper-nickel ores mined for nickel smelting, pentlandite is present, they also contain a lot of copper, cobalt, platinum, and other valuable metals. Chalcopyrite or copper pyrite
اقرأ أكثر
Galena ore Oxide Sphalerite concentrate Galena concentrate (70% Pb) SO2 Coke + flux Slag ... Blast furnace smelting, 1250°C APPENDIXES 561. A.3a Flow Sheet for Extraction of Nickel from Pentlandite via ... A.3b Flow Sheet for Extraction of Nickel from Pentlandite via Hydrometallurgical Route 1. Formation of nickel ammonium
اقرأ أكثر
The kinetic analysis of the pentlandite-bearing ore oxidation process was performed using the method of non-isothermal kinetics of Daniels and Borchardt under a …
اقرأ أكثر
Ore. An ore is a mineral which has a valuable metal inside it. Ores are usually extracted by being mined. They can sometimes be found on the Earth's surface. Most ores are chemical compounds such as oxides or sulfides. There are different ways to get the metal out of the ore, which is called smelting. Iron ore, for example, is smelted in a ...
اقرأ أكثر
The pentlandite, chalcopyrite and pyrrhotite from Enonkoski ore ground in a steel mill Soated easily without a collector at low pH values of 3}5 (Figure 1). The Soatability of …
اقرأ أكثر
The majority of the platinum-group elements in the Merensky ore are associated with pentlandite [(Fe,Ni) 9 S 8], occurring either in pentlandite grains or at the pentlandite–gangue grain boundaries (Peyerl, 1983, Jones, 1999). Palladium and rhodium are the PGEs contained mostly in pentlandite (Peyerl, 1983, Cabri, 1992, Godel et al., …
اقرأ أكثر
Purchase this Article for $25.00. "A new hydrometallurgical process for nickel extraction from a low grade laterite ore such as limonite has been developed by RIST and POSCO. This POSCO Nickel Extraction Process (PosNEP) consists of five main processes: ore reduction using hydrogen as a reductant; acid leaching at atmospheric pressure and ...
اقرأ أكثر
Separating sulfide minerals from each other, for example, separating pentlandite [(Ni,Fe) 9 S 8] from pyrrhotite [Fe 8 S 9], is more complex. It relies on modifying the surfaces of the pyrrhotite so that the xanthate collector does not attach to them. The most common modifier in water–ore slurry is the OH − ion (hydroxyl ion).
اقرأ أكثر
Pentlandite (Pn), the primary Ni-bearing mineral of the sulfide ores is typically associated with pyrrhotite (Pyrr), pyrite, chalcopyrite, as well as non-sulfide gangue minerals. While Pn itself contains ∼36 wt% Ni, the average Ni grade of the sulfide ore is in the range of 1.3–2.8 wt% [ 9, 10 ].
اقرأ أكثر
Abstract. This chapter explains the process of nickel concentration from ground sulfide ore, the starting material. This is necessary because mined nickel sulfide ores contain between 1% and 3% Ni ...
اقرأ أكثر
In addition to the sulfides mentioned above, pentlandite [(Fe,Ni) 9 S 8] and its alteration product, violarite (FeNi 2 S 4), are important as the major ore minerals of nickel; bornite (Cu 5 FeS 4) and chalcocite (Cu 2 S) as major copper minerals; and molybdenite (MoS 2) is the primary source of molybdenum.
اقرأ أكثر
The kinetic analysis of the pentlandite-bearing ore oxidation process was performed using the method of non-isothermal kinetics of Daniels and Borchardt under a constant heating rate. The heating of the sample was performed in an air atmosphere, in a temper-ature range of 298–1273 K under a heating rate of 15 min 1.
اقرأ أكثر
