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process by significantly reducing nickel emissions and notably improving the working hygiene of operators. This new technology reduces operating costs and enables fully automated process and oxygen recovery from the electrowinning process. Nickel crystals recovery .
Nickel is recovered through extractive metallurgy: it is extracted from its ores by conventional roasting and reduction processes that yield a metal of greater than 75% purity. In many stainless steel applications, 75% pure nickel can be used without further purification, depending on .
With the increased requests for more sustainable extraction processes feedstocks with low metal content are becoming more attractive. In this research, an additional refining step is investigated in order to recover valuable metals from slag generated during nickel extraction process, particularly copper, nickel, and cobalt.
The ability to fire assay a substance relies on a number of facts. First of all, the samples that contain gold and silver should be solubility in molten metallic lead and that gold and silver are insolubility in slag. Fire assay also relies on the difference in specific gravity between the two liquids, the molten lead and the slag.
Described here is a process for recovering chromium and other metals from superalloy scrap. Laboratoryscale experiments were conducted to test a complex flowsheet utilizing a wide range of extractive metallurgical operations.
streams of some process effluents to prevent a buildup of various impurities. Solid wastes from nickel sulfide ores often contain other metals such as copper, and precious metals, and consideration should be given to further processing for their recovery. Slag can be used as construction material after nickel recovery .
Meanwhile, an economically viable extraction process was proposed to preliminarily utilize the nickel slag based on textural and mineralogical characteristics of the slag, and the magnetic concentrate, assaying about 62% iron grade at over 75% recovery rate, was obtained through the recommended method. View FullText
A hydrometallurgical process for the recovery of nickel and cobalt values from a sulfidic flotation concentrate. The process involves forming a slurry of the sulfidic flotation concentrate in an acid solution, and subjecting the slurried flotation concentrate to a chlorine leach at atmospheric pressure followed by an oxidative pressure leach.
Nickel processing Nickel processing Extraction and refining: 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 highertemperature refractories and the increased cooling required to accommodate the higher operating temperatures in nickel ...
Abstract. Nickel slag can be recycled as one of the excellent secondary sources due to valuable iron resource. Slag viscosity during iron recovery from nickel slag by aluminum dross was studied from 1773 to 1873 K, and the viscosity evolution in different periods was systemically discussed.
method. In addition to the recovery of valuable metals, the slag product of the process, known as Plasmarok®, can be sold for use as an aggregate, owing to its inertness, low leachability and engineering properties. The exhaust gases pass into a secondary combustion chamber to .
USA US05/931,804 USA USA US A US A US A US A US A US A US A US A US A Authority US United States Prior art keywords set forth process source nickel ore Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.
The method of removal of chromium and/or Nickel from a liquid slag or mixtures thereof, including the supply of liquid slag containing chromium and/or Nickel, in a liquid metal bath, in particular ironcontaining bath, and recovering the liquid slag in two stages, with the first stage of recovery is carried out by introducing carbon or media ...
Mintek has been working on the recovery of cobalt, and the associated valuable metals, from slags, since 1988, using DCarc furnace technology to effect selective carbothermic reduction of the oxides of cobalt, nickel, copper, (and zinc, where present), while retaining the maximum possible quantity of iron as oxide in the slag.
During the pyrometallurgical treatment of the nickelbearing laterite in the plant of LARCO, slag is produced after treatment in electricarc furnace (EAF) that contains to % Ni.
OUTOTEC SMELTING SOLUTIONS FOR THE PGM INDUSTRY L. Aspola Outotec R. Matusewicz Outotec K. Haavanlammi Outotec ... As in any extraction process, recovery of the metals is crucial. Fortunately there is little tendency for the ... Figure 4Nickel smelting slag target chemistry
The Sherritt process is a hydrometallurgical process named for Sherritt Gordon Mines Ltd. (now Sherritt International) of Sherridon and Lynn Lake Manitoba Canada, based on the older Forward process developed by Dr. Frank Forward for the recovery of copper and nickel from those same mines.
During the pyrometallurgical treatment of the nickelbearing laterite in the plant of LARCO, slag is produced after treatment in electricarc furnace (EAF) that contains to % Ni. Taking into account the great quantity of slag produced per year, the recovery of nickel from the EAF slag will add benefits to the entire process.
Outotec Slag Cleaning Slag cleaning at copper and nickel smelters is typically done using an electric furnace process. The design of Outotec slag cleaning furnaces is based on our extensive experience with different slag compositions and understanding of how to optimize the process for maximum recovery.
Milled slag as flotation feed showed recoverylimiting features such as free matte with oxidised surfaces and unliberated matte inclusions in the slag. The biggest nickel losses, assuming no tapping problems, are in the glass phase solid solution. Only around 40% of nickel would be recovered from the slag, even under ideal conditions.
The low recovery amounts at low temperature is due to the low reactivity of slag, while as the temperature increases, the nonmatching of zinc and copper recovery is due to partial hydrolysis of slag till 35°C but increasing the temperature to 70°C seriously decreases zinc recovery due to possible polymerization and hydrolysis.
attention in the utilization of nickel slag. This study involves the selective recovery of nonferrous metals (nickel and copper) versus iron, from nickel slag by selective reduction−magnetic separation process, with an aim to make highgrade nickel and copper concentrate for producing special steel,
process. This addition of sulphur will favor the transformation of nickel, copper and cobalt oxides into sulphides and at the same time will lower the melting temperature of the matte to less than 1300 ºC from the 1400 ºC of the nickel iron alloys [89, 16 ]. 2. experimental Converter slag .
nickel sulfide ores often contain other metals such as copper and precious metals, and consideration should be given to further processing for their recovery. Slag can be used as construction material after nickel recovery, as appropriate (, re turn of converter slag to .
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