atmospheric ammonia leach matte

Atmospheric Ammonia Leach Matte

Atmospheric Ammonia Leach Matte

Atmospheric Ammonia Leach Matte We are a large-scale manufacturer specializing in producing various mining machines including different types of sand and gravel equipment, milling equipment, mineral processing equipment and building materials equipment.

atmospheric ammonia leach matte - vuchterhoes.be

The deposition of atmospheric ammonia and its effects on Across Europe total nitrogen deposition is increasing and of this total atmospheric ammonia can contribute up to 50–80 . Average deposition of ammonia in the UK is likely to be around 15–20 kg ha −1 yr −1 while in The Netherlands which has some of the highest rates of deposition this value is likely to be …

NICKEL MATTE CHLORIDE LEACHING - Outotec

ammonia. The water balance is controlled by evapora-tion after the ammonia regeneration. Calcium chloride is regenerated into hydrochloric acid and the solution is returned to leaching. In total, the leaching process takes about 10 to 15 hours to complete. The leaching residue weight is about 25 percent of that of the matte fed into the process.

Outotec’s Innovative Nickel Matte Leach Process | E & MJ

Outotec, in fact, said it has constantly been developing new, sustainable, and economically viable nickel processing methods—and its nickel matte chloride leaching process is designed to leach matte in atmospheric OKTOP reactors using hydrochloric acid and oxygen, as well as ammonia …

:: Outotec’s Innovative Nickel Matte Leach Process

Outotec, in fact, said it has constantly been developing new, sustainable, and economically viable nickel processing methods—and its nickel matte chloride leaching process is designed to leach matte in atmospheric OKTOP reactors using hydrochloric acid and oxygen, as well as ammonia …

Atmospheric acid leaching of nickel-copper matte from ...

Therefore, the repulping stage is basically an atmospheric leach stage in which the matte containing mostly Ni and Cu is leached in copper-spent electrolyte from the tank house, resulting in dissolution of nickel and precipitation of almost all the copper.

Oxidative dissolution of nickel matte in dilute sulfuric ...

Leaching of the matte is performed in the presence of chloride compounds at temperatures close to the boiling point of solution. Falconbridge (now Glencore) employed a non-oxidative chloride process using excess concentrated HCl under atmospheric conditions (Winand, 1991).

(PDF) ATMOSPHERIC LEACHING OF MATTE AT THE PORT NICKEL ...

The results obtained revealed that the recovery of nickel and copper from the matte was greatly influenced by the concentration of ammonia, leaching time, leaching temperature, and pH.

Atmospheric acid leaching of nickel- copper matte from ...

Atmospheric acid leaching of nickel-copper matte from Impala Platinum Refineries The pre-leach stage in the second process route alternative, described above, is the subject of this study.

The Effect of Leaching Time and Ammonia Concentration on ...

The effects of ammonia concentration and leaching time were investigated to determine the optimum leaching conditions. The experiments were conducted in a leaching cell submerged in a water bath, with ammonia concentrations of 1.5 M, 2.0 M, 2.5 M and 3.0 M and varying leaching time from 0 to 300 min.

Parametric Effects on Leaching Behavior of Nickel-Copper ...

The oxidative ammonia/ammonium sulphate leaching of an artificial matte was carried out to investigate the extraction behavior of copper, nickel, and cobalt.

Atmospheric oxidative and non-oxidative leaching of Ni-Cu ...

Atmospheric oxidative and non-oxidative leaching of Ni-Cu matte the leaching behaviour of typical South African PGM-containing Ni-Cu mattes in chloride media is worth investi-gating. This study investigated the atmospheric leaching of PGM-containing Ni-Cu matte by acidic ferric chloride solution. The aim of this project was to achieve maximum ...

Ammonia/nitric Acid Leaching of Copper- Cobalt Oxidized Ore

reported that, copper from Cu matte can Ni-easily been leached by using ammonia at atmospheric condition. Ammonia leaching is also selective in that it will not dissolve all available nonspecific metals, such as iron and manganese, along with the copper or cobalt, as sulphuric acid does. More Ammonia leaching can be used in non-oxidative,

Outotecs innovative nickel matte leach process. - Free ...

Nov 01, 2014 · Outotec, in fact, said it has constantly been developing new, sustainable, and economically viable nickel processing methods--and its nickel matte chloride leaching process is designed to leach matte In atmospheric OKTOP reactors using hydrochloric acid and oxygen, as well as ammonia for pH control.

Recovery of nickel and copper from high-grade matte at ...

High-grade nickel-copper matte is treated at Impala Platinum to produce nickel briquettes and copper cathodes. The remaining residue is separately treated for the recovery of platinum group metals. The major portion of the nickel values is preferentially extracted in a first stage acid oxidation leach.

Atmospheric Ammonia: Sources and Fate

Atmospheric Ammonia: Sources and Fate June 2000 CENR Air Quality Research Subcommittee 1 INTRODUCTION Gaseous ammonia has long been known to play a key role in atmospheric stone processes and, following deposition, in the biogeochemical processes that occur in sensitive ecosystems (forests, soils, streams, and coastal waters). Ammonia also ...

Ammonia and Atmospheric Chemistry

Ammonia and Gas-Phase Chemistry • Most species in the atmosphere react with the hydroxyl radical (OH) • These reactions remove the primary species, but initiate a complicated chain of radical reactions leading to the formation of ozone and other secondary pollutants

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