nickel sulfide concentrating

Nickel Sulfide Versus Laterite : The Hard Sustainability ...

nickel. Given that many major nickel companies report annually on their sustainability performance, such as Eramet, Inco (now Vale Inco), WMC Resources (now BHP Billiton), Norilsk Nickel, there is data available to examine in detail the differences in the environmental costs of nickel sulfide versus laterite.

Sulfate as a Contaminant in Freshwater Ecosystems: Sources ...

Copper-Nickel Sulfide Mining in Minnesota and Sulfide Toxicity to Wild Rice In Freshwater Wetlands Mining of Sulfide Ores oxidation to sulfate discharge of sulfate to natural waters Effects on Wild Rice: healthy roots (left) and roots with sulfidic black discoloration (right) Symptons of Sulfide …

Recovery of precious metals using nickel sulfide fire ...

T1 - Recovery of precious metals using nickel sulfide fire assay collection. T2 - The Analyst. AU - Frimpong,A. AU - Fryer,B. J. AU - Longerich,H. P. AU - Chen,Z. AU - Jackson,S. E. PY - 1995. Y1 - 1995. N2 - The NiS fire assay is widely used for the separation and concentration of PGE and Au from geological materials.

Mechanisms of nickel toxicity in microorganisms

For example, a nickel-resistant strain of Desulfotomaculum cultured with high concentrations of this metal produces a dark-brown, soluble, nickel-sulfide product as a means to reduce the concentration of the free ion. 81 Pseudomonas putida S4 accumulates nickel in its periplasm, possibly in complex with an 18 kDa protein, as a mechanism of ...

What is the concentration of lead ions and sulfide ions in ...

Apr 11, 2016· What is the concentration of lead ions and sulfide ions in a saturated solution of lead sulfide (#PbS#) solution at 25°C? Chemistry Solutions Molarity. ... On dissociation the number of lead ions and sulfide ion in solution are in equal concentration we can reduce the above equation to, [ # Pb^(2+)# (aq) ] = ...

what is Ksp of nickel (II) sulfide if the equilibrium ...

Apr 01, 2010· Calculate the concentration of iodate ions in a saturated solution of lead(II) iodate if Ksp = 2.6 × 10–13.? More questions. Calculate Ksp for a saturated nickel (II) sulfide, NiS, solution with a molar concentration of 3.27 x 10-11? What is the pH of a saturated solution of Nickel(II)Hydroxide(ksp=2.0x10...

Nickel subsulfide CASRN 12035-72-2 | IRIS | US EPA, ORD

Basis: Increased risks of lung and nasal cancer in humans exposed to nickel refinery dust, most of which was believed to have been nickel subsulfide; increased tumor incidences in animals by several routes of administration in several animal species and strains; and positive results in genotoxicity assays form the basis for this classification.

Sulfide Ores - an overview | ScienceDirect Topics

Sulfide Ores. Sulphide ores were mostly created by (i) the intrusion of molten magma from the mantle into the crust of the earth and (ii) the formation of localized metal-rich sulphide ore bodies by sequential solidification and/or hydrothermal leaching and precipitation. From: Extractive Metallurgy of Nickel, Cobalt and Platinum Group Metals, 2011

Emission Estimation Technique Manual

Nickel Concentrating, Smelting & Refining 4 Likely emissions from facilities are discussed in Section 3, while Section 4 discusses the approach to emissions estimation and those elements of …

Chemistry Chapter 18 Flashcards | Quizlet

Start studying Chemistry Chapter 18. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Search. ... The Ksp of nickel sulfide (NiS) is 4.0 * 10^-20. ... (NiS) is 4.0 * 10^-20. What is the concentration of sulfide ion is a saturated solution of nickel sulfide to which 0.040 mol of nickel nitrate (NiNO3) is added?

Nickel(II) sulfate - Wikipedia

Nickel(II) sulfate, or just nickel sulfate, usually refers to the inorganic compound with the formula NiSO 4 (H 2 O) 6. This highly soluble blue-coloured salt is a common source of the Ni 2+ ion for electroplating. Approximately 40,000 tonnes were produced in 2005. It is mainly used for electroplating of nickel.

Enhanced methods for nickel recovery from low-grade ores ...

Sep 06, 2017· Low-grade ores, like nickel sulfide, are abundant on Earth. Nickel sulfide deposits contain high levels of magnesium silicate gangue minerals (MgO) and can be difficult to process with conventional flotation and smelting technologies. MgO is hydrophilic, which interferes with flotation of sulfide minerals, and reduces flotation recovery. In ...

Nickel processing - Extraction and refining | Britannica.com

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 higher-temperature refractories and the increased cooling required to accommodate the higher operating temperatures in nickel ...

Nickel Recycling in the United States in 2004

Nickel Recycling in the United States in 2004. By Thomas G. Goonan. ABSTRACT. As one of a series of reports that describe the recycling of metal commodities in the United States, this report dis-cusses the flow of nickel from production through distribu-tion and use, with particular emphasis on the recycling of

Nickel: smelting, producing-Metalpedia

Most sulfide deposits have traditionally been processed by concentration through a froth flotation process followed by pyrometallurgical extraction. In hydrometallurgical processes, nickel sulfide ores undergo flotation (differential flotation if Ni/Fe ratio is too low) and then smelted.

Nickel Deposits of - pubs.usgs.gov

Nickel Deposits of North America By H. R. CORNWALL GEOLOGICAL SURVEY BULLETIN 1223 Geology, resources, and reserves of nickel sulfide and nickeliferous laterite deposits in 7 Provinces of Canada and 15 States of the United States UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1966

Nickel subsulfide; CASRN 12035-72-2

Nickel subsulfide; CASRN 12035-72-2 Human health assessment information on a chemical substance is included in the IRIS database only after a comprehensive review of toxicity data, as outlined in the . IRIS assessment development process. Sections I (Health …

Determination of ultra-trace osmium and ruthenium in ...

Determination of ultra-trace osmium and ruthenium in geological samples by ICP-MS combined with nickel sulfide fire assay pre-concentration and microwave digestion. Author links open overlay panel Wenshan Ni 1 2 3 Hongli Zhang 1 2 3 Xiangju Mao 1 2 3 Lu Liu 1 2 3 Fang Xiao 1 2 3. Show more.

Nickel Electroplating | Products Finishing

Sep 29, 2011· A concentration of 4 oz/gal (30 g/L) nickel chloride is considered minimum for anode corrosion, unless special forms of anode material that contain nickel sulfide or nickel oxide are used as depolarizers. Low nickel chloride concentrations are used when throwing power is not a major consideration or when low deposit stress is required.

Chapter 6.10 Nickel - World Health Organization

There are two commercial classes of nickel ore, the sulfide ores (pentlandite and pyrrhotite) and the 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 tonnes in 1988 (5).