Background

sulfide ore making

Sulfur - Minerals Education Coalition

Sulfur attaches to metal ions, creating a number of significant sulfide ore minerals such as galena (lead sulfide), pyrite (iron sulfide), chalcocite (copper sulfide), and sphalerite (zinc sulfide). Mined sulfur is mostly from salt domes or bedded deposits. The vast majority is produced as a by-product of oil refining and natural gas processing.

Sulfide Mining and Human Health - Save the Boundary …

An example of the metal sulfide reaction is outlined in Figure 1. It demonstrates how sulfuric acid is generated in the presence of unearthed sulfide mineral rock. Copper-nickel ore frequently contains iron sulfide minerals such as pyrite (FeS2), one of the world's most common sulfide Iron hydroxide precipitating in a stream can be seen as

Online analysis of minerals from sulfide ore using near ...

The volcanogenic massive sulfide ore type is the most exploited type in Fennoscandia Shield. The ore of Pyhäsalmi contains copper (Cu), zinc (Zn), iron (Fe), and sulfur (S). In general, the mineral composition of ore deposits varies in terms of changing ore minerals, their quantitative ratios, and even as variation in mineral forms. Thus, the ...

Sulfide Ore Processing « TCB Metals and Refining

Instead of relying on autoclaves or roasting to prepare a sulfide ore for traditional leaching, our vibratory grinder on our circuit allows our leach to make contact with the precious metal encapsulated in the sulfide so leaching can occur. With the aggressive nature of our leach allowing us to process most ores in an hour, our process allows ...

Gold Ore - an overview | ScienceDirect Topics

Gold ores are classified "free-milling" and "refractory" based on their response to cyanide dissolution. Bioprocessing can be used to treat refractory gold-bearing sulfide ores as well as carbonaceous gold ores. It is essential to characterize different types of gold ores to understand the extent and nature of gold-entrapment in different associated mineral phases before an appropriate ...

Copper Ore Types: Sulfides vs. Oxides | An Investor's ...

Copper sulfide ores are typically the most profitable copper ore type to mine. That is because they have high copper content, and the copper in …

Lime in Gold Ore Mining Process | Flotation, Cyanidation ...

Gold flotation, in the treatment of simple metal sulfide ore with less cyanide harmful substances in the ore, generally control the flotation pH = 7~9 with lime. 2.2 Inhibiting the flotation of iron sulfide minerals. When flotation of various non-ferrous metal sulfide minerals (such as copper, lead, zinc, etc.) with xanthate collectors, the ore ...

A sulphide ore (A) on roasting leaves a residue (B) which ...

A sulphide ore (A) on roasting leaves a residue (B) which on reacting with HCl forms a water soluble compound (C ). Addition of KI to the solution of (C ), a...

Wisconsin and the Dangers of Sulfide-ore Copper Mining ...

Wisconsin legislators pass bill to repeal a Prove-it-First law, tacitly confirm that all sulfide-ore copper mines pollute.On Tuesday November 7, Wisconsin lawmakers eager to promote sulfide-ore copper mining passed and sent a bill to repeal that state's "Prove it First" sulfide mining moratorium law to Governor Walker's desk. The Prove-it-First law was passed in 1998 and obligates any ...

Sulfide Mining | Minnesota Center for Environmental Advocacy

Sulfide-ore mining for copper and nickel, however, has never been attempted here. In the case of PolyMet, MCEA has led the fight for accountability and true science-based decision-making. MCEA lawyers and experts have time and again cast light on the flaws inherent in the PolyMet proposal, first in the environmental review and permitting ...

Sulfide Mining Fact Sheet - MEPartnership

Sulfide mining is different from traditional iron ore mines and taconite mining (sometimes referred to as ferrous mining). Sulfide mines have never been operated safely – no mine of this type has been known to have operated and closed without polluting local lakes, rivers, or groundwater.ii

Sulfide Mining Overview - sosbluewaters.org

the economic feasibility of mining ores with even lower concentrations is likely to increase. For example, the proposed Polymet operation has an concentration of 0.28% copper and 0.08% nickel. 11 Sulfide Mining Process The sulfide mining process consists of: exploration, site preparation, mining,

Small Scale Treatment of PM Sulfide Ores | Gold Refining ...

The ore has a 5 to 10 percent sulfide content, so I expect about 10 to 20 pounds of sulfide concentrate. Dealing with 10 to 20 pounds is a lot easier than 200 pounds. There will be some loss of values in this operation - but I accept this because although the method is less than optimal, it's the best I can put together.

Copper Mining and Extraction Sulfide Ores

The smelter for sulfide ores produces sulfur dioxide gas. This is scrubbed from the flue gases to make sulfuric acid for leaching copper from oxide ores. Scrubbing sulfur dioxide also protects the environment. For example: FeO(s) + SiO 2 (s)→ FeO.SiO 2 (slag) This is …

Boundary Waters (BWCA) Sulfide Mining

Sulfide mining is the process of extracting trace amounts of copper, nickel and other metals from sulfide-bearing ores, which produces sulfuric acid. This is the same as battery acid. In addition to acidifying lakes and rivers, sulfuric acid leaches out heavy metals such as mercury, lead, arsenic and other toxins from the rock to produce acid ...

Nickel Statistics and Information - USGS

magmatic sulfide deposits where the principal ore mineral is pentlandite [(Ni,Fe) 9 S 8]. The ionic radius of divalent nickel is close to that of divalent iron and magnesium, allowing the three elements to substitute for one another in the crystal lattices of some silicates and oxides. Nickel sulfide deposits are generally associated with iron ...

Petrogenesis of Late Carboniferous–Early Permian mafic ...

This deposit is hosted by one of numerous small mafic-ultramafic intrusions in the Baoshan block and contains ∼0.52 million tonnes of sulfide ore with an average grade of 0.67 wt % Ni and 0.46 wt % Cu (Wang et al., 2018). Download : Download high-res image (2MB) Download : …

From Ore to Finished Product - Copper

7. Sulfide Ore Refining. The final step in processing sulfide ore copper from the smelter is to make high purity copper cathodes. 8. Copper Products & Many Uses. Copper cathodes are pure copper produced from the processing of copper ores. However, cathodes are not in …

GOLD FROM PYRITE !!!! How To Do It ..ask jeff Williams ...

We turns Fools Gold ( Iron Pyrite ) into real Gold and we show you how to get Gold from Pyrite. WARNING .....Very Dangerous ... A Step by Step How to do it...

What is roasting of a sulfide ore? - Quora

Answer (1 of 5): The concentrated ore ( received after crushing and floating) is roasted in a furnace in the presence of a current of air. Sulphur is oxidized to SO2 and impurities of arsenous and antimony are removed as volatile oxides. The following reaction takes place. 2CuFeS2 + O2 —- Cu2S ...

WO2013163712A1 - Sulfide ore leaching process - Google Patents

The present invention discloses a new process for leaching sulfide minerals consisting of leaching crushed ore in a vat reactor, wherein the leaching solution is fed with an ORP value close to the upper limit suitable for leaching and the exiting leaching solution leaves the reactor with an ORP above the lower limit suitable for leaching the ore.

Gold Recovery 101 - Sepro Systems

above, the sulfide-associated gold can cause issues with these processes. Some sulfide minerals consume large amounts of cyanide or dissolved oxygen (critical to the cyanidation process) and make whole ore leaching impractical or uneconomic. The ultra-fine gold particles associated with sulfide

Leaching of a pyrite-based ore containing copper using ...

The oxidation of sulfide-based ores is industrially relevant as it facilitates the extraction of valuable metals and eliminates undesired elements from an ore. Even though oxidation can be done thermally (pyrometallurgy), solution-based (hydrometallurgical) methods are currently sought as they represent a more sustainable option. Here, the leaching of a sulfide ore (32% Fe, 2% Cu) is ...

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

Sulfide ore grades range from 0.15-8% Ni, with 93% of known deposits ranging from 0.2-2% Ni. All nickel ores have relatively low nickel content, the classification is as follows: high-grade nickel ore has Ni content greater than 1.8%, middle-grade nickel ore has Ni content between 1.3-1.7%, low-grade nickel ore has Ni content between 0.6-1.2%.

Acid leaching of oxide–sulfide copper ore prior the ...

453 Acid leaching of oxide–sulfide copper ore prior the flotation – A way for an increased metal recovery Miroslav D. Sokić1, Vladan D. Milošević1, Velizar D. Stanković2, Vladislav Lj.Matković1, Branislav R. Marković1 1Institute for Technology of Nuclear and Other Mineral Raw Materials, Belgrade, Serbia 2University of Belgrade, Technical Faculty, Bor, Serbia

Recovery of Gold in Pyritic Sulfide Ores - Mine Engineer.Com

Sulfide ores, and pyrites in particular, have caused and continue to cause difficulty in recovering the gold values from these ores. In most instances, visible gold can not be seen under microscopic examination of pyrite gold ores. However, if the ore is ground to -200 mesh, most times, a few specs of gold can be visibly seen under microscopic ...

Well-regulated sulfide mining can be done effectively ...

Well-regulated sulfide mining can be done effectively. The Kennecott copper mine in Ladysmith, Wis., 1997. The dispute over mining Minnesota's world-class mineral deposits is …

Sulphide Gold Ore Treatment by Leaching and Flotation Process

Problem with gold recovery from sulphide ore: How may a mill get the maximum recovery of gold from a sulphide ore, at the least capital cost and at the same time obtain the highest net return.This latter point is most important. In many cases a gold mill using an all-cyanide flowsheet with fine grinding of all the ore will report very low gold content in the tailings particularly on an ...

What is Sulfide Mining? | Mining Action Group

Metallic sulfide mining (aka hard rock mining) is the practice of extracting metals such as nickel, gold and copper from a sulfide-rich ore body. Sulfides are a geologic byproduct of mining in this area, and by exposing sulfides to the air and water in our atmosphere, sulfuric acid can be created — threatening to poison the nearby water ...

Sulfide-Ore Copper Mining and/or A Sustainable Boundary ...

Proponents of sulfide-ore copper mining argue that the choice between this new type of mining and amenity-based development is a false choice for the Arrowhead region (Praxis Strategy Group, 2017). Those making this claim point to the continued …

Sulfide - Wikipedia

Sulfide (British English also sulphide) is an inorganic anion of sulfur with the chemical formula S 2− or a compound containing one or more S 2− ions. Solutions of sulfide salts are corrosive. Sulfide also refers to chemical compounds large families of inorganic and organic compounds, e.g. lead sulfide and dimethyl sulfide. Hydrogen sulfide (H 2 S) and bisulfide (SH −) are the conjugate ...

What Is Taconite Ore Used For?

Sulfide ores contain metals (such as copper or nickel) that are bonded to sulfur, forming sulfide minerals. How is steel made? To make steel, iron ore is first mined from the ground. It is then smelted in blast furnaces where the impurities are removed and carbon is added. In fact, a very simple definition of steel is "iron alloyed with carbon ...

Sulfide Minerals - ThoughtCo

Sphalerite can be found in many ore veins of sulfide minerals, commonly associated with galena and pyrite. Miners call sphalerite "jack," "blackjack," or "zinc blende." Its impurities of gallium, indium and cadmium make sphalerite a major ore of those …