Oxidizing roast is carried out to prepare a totally or a partly oxide product. For example, dead roasting of sphalerite concentrate to an all-oxide product is the prerequisite for the pyrometallurgical smelting processes. For copper and nickel extraction, only partial roasting is practiced. In order to produce a mixed oxide–
Synchronous extraction of nickel and copper from a mixed oxide–sulfide nickel ore in a low–temperature roasting system. Journal of cleaner production 177, 371–377 (2018). Article CAS Google ...
The key process requirements for arsenic removal from metal concentrates (copper and nickel) and ores (gold) by roasting are summarized from open literature. A simple flow diagram is presented for ...
Sulfation roasting, a common activation technique, is a potential method for cleaner production of nickel from complex low-grade ores. In this study, nickel oxide–sulfide mixed ore concentrate was…
The effect of high intensity conditioning before flotation on hydrophobic flocculation of sulfide minerals and its relationship with flotation of low-grade copper-nickel sulfide ore were ...
Other articles where roasting is discussed: history of Europe: Control over resources: …mining techniques and needed initial roasting before smelting. At the same time, they were more widely available than surface deposits, and there were sources in both central and western Europe—ores in Germany, Austria, and the Czech and Slovak Republics …
An original methodology based on the use of experimental values of the conditional equilibrium constants in metallurgical calculations was employed to perform a theoretical modeling of the exchange interactions in melts formed during joint matte smelting of oxidized saprolite nickel ore and a product (cinder) of partial oxidizing …
The low-temperature sulfide roasting process with ammonium sulfate has been successfully applied globally to various types of mineral feeds [23], such as lateritic …
Nickel processing - Extraction, Refining, Alloying: The extraction of nickel from ore follows much the same route as copper, and indeed, in a number of cases, similar processes and equipment are used. The major differences in equipment are the use of higher-temperature refractories and the increased cooling required to accommodate the higher operating …
andCaO of ore concentrate enter into roast product. Fe n. ith Fe or with Cu. ts and products are N 6 ore one can do either SiO 6 balance or Al 6. O 7 balance or even CaO balance. roa t à â Ú Roas ns Cu All copper in the roasted ore is as Cu and Fe partly oxidized to Fe and partly to Fe . During roasting 5000 of ore concentrate is used.
The ore sample used in the work was low-grade nickel sulfide ore provided by Jinchuan Group, China. The chemical composition of the ore analyzed by XRF (XRF, S8 TIGER II, Germany) was shown in Table 1. It can be seen that the valuable metals contained in the ore are nickel and copper, with the content of 4.63 % and 2.75 %, respectively.
Sulfation roasting, a common activation technique, is a potential method for cleaner production of nickel from complex low-grade ores. In this study, nickel oxide–sulfide mixed ore concentrate was … Expand
A new extraction technology of chlorination roasting with a mixture of MgCl 2 ·6H 2 O and NaCl was investigated to co-extract nickel and copper from low-grade nickel ores. The effects of some key factors on the extraction of nickel, copper, and iron were studied, and the results show that,when the roasting temperature is 850°C, the …
In the hydrometallurgical processes, the ore or concentrate is brought into close contact with a leach solution (frequently sulfuric acid) that dissolves the copper and leaves a residue of gangue (and frequently precious …
Sulfation roasting, a common activation technique, is a potential method for cleaner production of nickel from complex low-grade ores. In this study, nickel oxide–sulfide mixed ore concentrate ...
Reduction roasting–magnetic separation technology has been extensively applied to the extraction of nickel from laterite nickel ores with low nickel content due to its short process flow, low energy consumption, and minimal influence on the environment (Zhang et al., 2020, Zhu et al., 2019).
The effects of some key factors on the extraction of nickel, copper, and iron were studied, and the results show that,when the roasting temperature is 850°C, the roasting time is 1.5 h, the mass ...
found that certain ores, consisting of simple pyrites, suffered great loss of gold in roasting with salt which had been added at the commencement of the operation; only a small part of this gold was condensed in the flue, in which was found a yellowish fluffy precipitate, consisting largely of chlorides of copper and iron, and …
Sulfation roasting, a common activation technique, is a potential method for cleaner production of nickel from complex low-grade ores. In this study, nickel oxide–sulfide …
In this paper, the process of solid-state metalized reduction and magnetic separation was investigated for preparation of nickel–iron concentrate from a low-grade laterite nickel ore. The effects of reduction temperature, reduction time, amount of dosages, and magnetic field strength on grades and recoveries of nickel and iron were studied. The results …
The possibility of applying a combined concentration and metallurgical method for processing low-grade and refractory copper–nickel ores was considered. The resulting rougher and scavenger flotation concentrate contained 2.07% nickel and 0.881% copper at a recovery of 85.44% and 89.91%, respectively. The concentrate was then …
The direct hydrometallurgical processing of nickel sulfide concentrates and whole ores may be a remedy to these issues and hydrometallurgy offers several advantages over pyrometallurgy such as ...
The possibility of applying a combined concentration and metallurgical method for processing low-grade and refractory copper–nickel ores was considered. The resulting rougher and …
Sulfation roasting, a common activation technique, is a potential method for cleaner production of nickel from complex low-grade ores. In this study, nickel oxide–sulfide mixed ore concentrate ...
Keywords: copper–nickel ore; flotation; rougher concentrate; ammonium sulfate; roasting; aque-ous leaching 1. Introduction To date, more than 400 copper–nickel ore deposits have been discovered worldwide, and the combined global reserves of copper and nickel are currently estimated at 1.6 billion tons and 210 million tons, respectively.
Nickel sulfide ore is an important raw material for nickel production. It is a complex mineral containing nickel, copper, cobalt and platinum group elements, which can provide 60% of the world's nickel products. 1,2,3 China's Jinchuan Nickel Mine is one of the well-known and super-large polymetallic associated magmatic nickel sulfide …
The effect of roasting temperature in the range of 300–550 °C on the extractions of nickel, copper, cobalt, magnesium and iron was investigated using the …
The paper discusses methods of processing copper-containing molybdenite concentrates. A process flow diagram based on roasting with sodium chloride (or carbonate) and subsequent water leaching is presented. The chemistry of sulfide interaction with salt additives is described. The effect of the roasting temperature on copper and …
A more recent paper, "Roasting of Arsenical Gold Ores and Concentrates" by F. R. Archibald contains a bibliography listing 23 references on the subject of roasting gold and silver ores. There are four general types of roasting furnace in use:
Sulfation roasting, a common activation technique, is a potential method for cleaner production of nickel from complex low-grade ores. In this study, nickel oxide–sulfide mixed ore concentrate ...
The major portion of platinum and palladium produced today from primary sources originates from the Bushveld Igneous Complex in South Africa. The most important reefs mined are the Merensky, Upper Group Two (UG-2) and Platreef (Cramer, 2001).Ore grades range from 3 to 8 g/t PGM, with associated nickel and copper in the 0.1–0.2% …
The chloridization and reduction roasting of high-magnesium, low-nickel oxide ore containing 0.82 pct Ni and 31.49 pct MgO were investigated in this study. Mineralogical investigation indicated that 84.6 pct of nickel was associated with silicates, and nickel was well distributed in mineral in the form of isomorphism. A series of …
In this study, a process of reduction roasting–magnetic separation of laterite nickel concentrate is proposed. The effects of spent cathode carbon as a reducing agent, with a low amount of CaO used as an additive, on the reduction roasting processes of laterite nickel ores are studied.
The products of oxidation roasting of sulfide copper ores can be considered as an effective sulfiding agent and collector of valuable metals during …
