The data of the 675° C. segregation roast show copper recoveries in excess of 80% with good selectivity can be obtained by practice of the present invention. A copper nickel bulk flotation sulfide concentrate containing 13.5% copper and 2.7% nickel was dead roasted at 850° C. to a sulfur content of 0.2%.

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Various processes are used to treat nickel matte. One process is the ammonia pressure leach, in which nickel is recovered from solution using hydrogen reduction, and the sulfur is recovered as ammonium sulfate for use as fertilizer.In another, the matte may be roasted to produce high-grade nickel oxides; these are subjected to a pressure leach, and the solution is electro- and carbonyl refined.

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At the INCO (International Nickel Co.) operation in Sudbury, Ontario, further separation of nickel from copper is accomplished by application of mineral dressing techniques to slow-cooled nickel mattes. These mattes contain about 50 pct Ni, 30 pct Cu, 20 pct S, and <1 pct Fe. They consist of grains of chalcocite (Cu2S) in a matrix of ...

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The iron sulfide along with the associated nonferrous sulfide minerals is comminuted to at least about minus 20 mesh Tyler Screen Size (T.S.S.) in order to insure good solid-liquid and solid-gas contact and dispersion and to insure good separation of nickel from copper with corresponding high grade copper concentrates being obtained.

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Synchronous extractions of nickel, copper, and cobalt by selective chlorinating roasting and water leaching to low–grade nickel–copper matte. Separation and …

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In the treatment of copper-nickel sulfide ores, separation of copper from the nickel has been one of the major metallurgical problems. This article describes techniques adopted by Inco on the basis of its laboratory studies and pilot-plant development.

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Nickel Extraction and purification. Apr 24 2010 · Nickel sulfide ores undergo flotation differential flotation if Ni Fe ratio is too low and then are smelted After producing the nickel matte further processing is done via the Sherritt Gordon process First copper is removed by adding hydrogen sulfide leaving a concentrate of only cobalt and nickel

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Improved copper / nickel separation in milling operations has the potential to substantially improve the processing of the resulting concentrates and thus the overall return from the extraction of nickel and copper from sulfide ores.INTRODUCTIONNickel metal by itself or in alloys with other metals and materials makes a significant contribution ...

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Abstract As a result of the innovative solutions found due to the joint efforts of Russian and Finnish researchers, the recovery of nonferrous and precious metals in Norilsk Nickel Harjavalta was significantly increased (%): the recovery of Ni was increased to 98.7; that of Cu, to 99.5; Pt, to 99.6; and Pd to 99.6. Simultaneously, a copper cake (one of the main commercial products) of an ...

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bottom layer of nickel matte is tapped intermittently. By careful control of temperature and sulphur content a nickel matte can be obtained containing little copper and all the platinum metals, whereas any gold will have followed the copper sulphide into the "tops" layer. Casting the enrichd nickel matte into pigs. These are then crushed ...

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The technique utilizes a two-stage bulk sulfide flotation procedure to obtain a copper concentrate that analyzed 25 percent copper and 0.5 percent nickel, and a nickel concentrate that analyzed 10 percent nickel and about 1 percent copper. As an alternative route, flotation of matte was also investigated.

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In the end, you can recover the metals by means of crushing, grinding, flotation and magnetic separation. Besides, leaching one or two metals from the matte also can …

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The process of oxidizing low-nickel matte using flowing air in a horizontal converter results in a large amount of slag containing nickel, cobalt, copper, and other metals.

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The nickel industry worldwide has traditionally smelted concentrates produced from nickel, copper and cobalt sulphide ores to make an intermediate sulphide product called matte. Hydrometallurgy has been used for refining the matte to produce high purity nickel, copper and cobalt for the market.

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1. Introduction. The global production of nickel is largely based on nickel sulphide minerals (60%) with pyrometallurgical converting into matte, followed by a hydrometallurgical process with unit processes such as leaching (atmospheric and/or pressure), iron removal, solvent extraction (SX) for cobalt and nickel and final product recovery, typically by electrowinning (EW), hydrogen ...

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12%In the treatment of copper-nickel sulfide ores, separation of copper from the nickel has been one of the major metallurgical problems. This article describes techniques adopted by Inco on the basis of its laboratory studies and pilot-plant development.

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The residue is removed. A feed of matte and sulfide concentrate containing approximately 0.4% cobalt and 30% sulfur is pressure leached at elevated temperature and pressure in an ammoniacal solution to produce a solution of nickel, copper and cobalt. By boiling away the ammonia; copper is precipitated as a sulfide and sent to a smelter.

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Highly efficient separation of nickel and iron is essential and difficult for the extractive metallurgy of either nickel laterite or nickel-oxide-sulfide mixed ore (NOSMO) . The conventional matte smelting technique, which is famous for its high efficiency in sulfide ore metallurgy, can produce difficulties when processing oxide-based ores [ 3 ].

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SUBSTANCE: proposed method includes floatation separation of converter matte into copper and nickel concentrates, oxidizing annealing of nickel concentrate, reduction of nickel monoxide, leaching-out of reduced nickel monoxide, cleaning the leaching-out solutions in succession from iron, copper, cobalt and electrical extraction of nickel.

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discovered that heat made copper more malle-able. Casting and smelting of copper began around 4000-3500 B.C. (see figure 6-2). About 2500 B. C., copper was combined with tin to make bronze—an alloy that allowed stronger weapons and tools. Brass, an alloy of …

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In smelting ores and concentrates of copper or nickel, matte fall is obtained by recycle of ferrous sulfate which is produced when the matte is leached with sulfuric acid. The residue from leaching then contains the copper, nickel or cobalt values in concentrated form. In this method the ferrous sulfate is reduced to ferrous sulfide at elevated temperatures.

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Nickel Ore Processing / Highmetals KDS Technologies. The magnetic separation and re-election is usually secondary dressing method. Flotation of sulfide copper-nickel ore, it is often uses copper sulfide flotation...

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Chlorination technique for simultaneously extracting Ni and Cu from mixed oxide-sulfide copper-nickel ore or selective chlorination for the removal of copper from copper slag was developed. Copper film is a promising material which can ... in the separation between matte and slag, low recovery of valuable metals, and etc. A low-temperature ...

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Sulfide deposits are usually mined by underground techniques in a manner similar to copper, although some deposits have been mined using open pits in the early stages. The mining of laterites is basically an earth-moving operation, with large shovels, draglines, or front-end loaders extracting the nickel-rich strata and discarding large ...

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A mineralogical study of the phases formed during the CuSO 4 H 2 SO 4 O 2 leaching of nickel-copper matte Can. Metall. Q., 26 ( 1987 ), pp. 265 - 276 View Record in Scopus Google Scholar

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Then wait until the matte cools down, during which time, particles of copper sulfide, nickel sulfide, and a metallic fraction will be formed. In the end, you can recover the metals by means of crushing, grinding, flotation and magnetic separation. Besides, leaching one or two metals from the matte also can be used to separate the copper and nickel.

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Nickel Ore Mining Process. Nickel ore mainly consists of copper-nickel sulfide ore and nickel oxide ore, beneficiation and processing of both methods is completely different. Copper-nickel sulfide ore beneficiation methods: The most important is the flotation. The magnetic and the gravity separation is usually secondary dressing method.

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Nickel is a silvery white, naturally occurring metallic element with a light golden tinge. There are two main types of nickel deposits - laterite and sulphide – each requiring a different extraction technique. Stainless steel. Nickel sulphide and laterite ore are used to make nickel metal, predominantly for the production of stainless steel.

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The Rapid development of new energy vehicle industry leads to the sharp demand for nickel, cobalt and precious metals in recent years. Because of the similar chemical properties, these metals often exist in Ni-Cu sulfide ores. Traditional treatment of Ni-Cu sulfide ores includes smelting and converting operation. In the smelting process, nickel, copper, cobalt and precious metals are enriched.

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excellent cobalt-nickel separation primary leach liquor by Cyanex 272. However, manganese extraction from the leach liquor along with cobalt could not be avoided, thus increasing the cost of the process. For sulphide ores, there is another alternative; if the ore can be concentrated by flotation, matte smelting is used instead of leaching.

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