Gold Refining Forum.com

Mar 25, 2018· 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.

Sulfide Ores - an overview | ScienceDirect Topics

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. Related ...

How copper is made - material, used, processing, steps ...

1 Most sulfide ores are taken from huge open-pit mines by drilling and blasting with explosives. In this type of mining, the material located above the ore, called the overburden, is first removed to expose the buried ore deposit. This produces an open pit that may grow to be a mile or more across.

Recovery of Gold in Pyritic Sulfide Ores - mine-engineer.com

Recovery of gold in sulfide ores has fallen into several categories. First is froth flotation, and second is cyanidation of the ores. Using cyanide to recover gold from sulfide ores generally results in 30 to 35% recovery, and the best I have heard of is around 50% recovery.

Empire Gold Mining Show Sulfide roasting - YouTube

Jan 03, 2015· Empire Gold Mining Show Sulfide roasting Empire Gold Mining. Loading... Unsubscribe from Empire Gold Mining? ... Sign in to make your opinion count. Sign in. 28. Loading...

Sulfide Ore Processing « TCB Metals and Refining

Sulfide Ore Processing. Home → Sulfide Ore Processing . Processing Sulfide Ores. Historically, miners have shipped their sulfide concentrates to overseas smelters that have little to no regulations or emissions controls. However, with the implementation of the Mercury Export Ban of 2008 and the high costs of installing equipment to prepare ...

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.

Treatment of Mixed Sulfide Oxide Ores of Copper

Many of our largest copper deposits contain both sulfide and oxidized copper minerals. The large porphyry mines, with a total copper content of from 1.3 to 2.0 per cent., send to their mills ore with an oxide content of from 0.2 to 0.4 per cent.

Sulfur - Simple English Wikipedia, the free encyclopedia

Hydrogen sulfide and sulfur dioxide are some sulfur compounds that are released when coal burns. They are reacted to make sulfur. Sulfur in the ground in melted, then forced up through pipes by compressed (squeezed) air. Uses. Sulfur is commonly used in gunpowder, medicine, and matches.

Concerns Over Sulfide Mining Resurface With Tiffany's Bill ...

Sep 20, 2017· Sulfide mining for metals like copper and gold hasn't been around in Wisconsin for more than two decades but Republican state Sen. Tom Tiffany is pushing a bill to make it easier for companies to operate in Wisconsin.

MASSIVE SULPHIDE DEPOSITS - Earth Science Australia Home …

The field relationships of the ore-bearing intrusion and the sulfide ore body are controlled by the geological features of the wall rocks. 2.Making sense of mining company press releases ... massive sulphide deposits are small, difficult to find targets. For every large, high grade deposit, there are likely to be large numbers of small, lower ...

Top 10 Reasons To Stop Twin Metal's Sulfide Mining ...

Backcountry Hunters & Anglers is the sportsmen's voice for our wild public lands, waters and wildlife. And the Minnesota chapter of Backcountry Hunters & Anglers (BHA) has been fighting to protect northern Minnesota's waterways, watersheds and wildlife from proposed sulfide-ore copper mines for going on a decade now.

PYRITE ROASTING, AN ALTERNATIVE TO SULPHUR …

PYRITE ROASTING, AN ALTERNATIVE TO SULPHUR BURNING M Runkel and P Sturm Outotec , Oberursel GERMANY Abstract The roasting of sulphide ores and concentrates is often the first step in the production of metals or chemicals. In many processes, the production of sulphuric acid is viewed as a ... The roasting of sulphide concentrates is often ...

SULFIDE MINING - Minnesota Center for Environmental ...

Sulfide mining, unfortunately, poses several significant environmental risks. The most significant one is the threat to water quality. When sulfide ores are exposed to air and water, the result is sulfuric acid, which causes the leaching of potentially toxic heavy metals and the release of sulfates that contribute to the methylation of mercury.

Sulphide Ores - Clariant Ltd.

Sulphide Ores Optimize your recovery and reagent consumption for sulfide ores with customized technical solutions. At Clariant Mining Solutions, we are proactive solution-seekers committed to optimizing your mineral processing operations through creative problem-solving.

Copper Mining and Processing: Processing of Copper Ores ...

Copper processing is a complicated process that begins with mining of the ore (less than 1% copper) and ends with sheets of 99.99% pure copper called cathodes, which will ultimately be made into products for everyday use.The most common types of ore, copper oxide and copper sulfide, undergo two different processes, hydrometallurgy and pyrometallurgy, respectively, due to the different ...

Sulfide Mining Overview - Save Our Sky Blue Waters

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,

Rebellious Ores: Sulfides, Selenides and Tellurides

Interested in solving the difficulties of dealing with rebellious ores and recover their gold and silver? Many types of valuable ores contain Sulfides, selenides or tellurides and they can make processing these ores more difficult. Recognizing these minerals can help us understand and find gold deposits in the field.

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 …

How to Extract Precious Metals From Sulfides | Sciencing

Extract sulfide ore deposits from the ground and place in to the crusher to mince ore from 5 to 50 micrometers. Crushing begins the separation process by preparing the ore to be floated in water. First, the ore is crushed using a gyratory crusher to reduce the ore to 6-inch diameter pieces.

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 ...

12.3 Primary Copper Smelting - United States Environmental ...

Ore concentration is roasted to reduce impurities, including sulfur, antimony, arsenic, and lead. The roasted product, calcine, serves as a dried and heated charge for the smelting furnace. Smelting of roasted (calcine feed) or unroasted (green feed) ore concentrate produces matte, a molten mixture of copper sulfide (Cu2S), iron sulfide

Copper extraction - Wikipedia

Supergene ores rich in sulfides may be concentrated using froth flotation. A typical concentrate of chalcocite can grade between 37% and 40% copper in sulfide, making them relatively cheap to smelt compared to chalcopyrite concentrates.

Mining and Extraction: Oxide Ores - processes for ...

Extraction of sulfide ores is covered in more detail in Copper Mining and Extraction: Sulfide Ores (11–14), but is introduced here because an important by-product of this process is used for the extraction of oxide ores. Pyroprocessing Sulfide Ores Provides Acid for Leaching. The process used to treat sulfide copper ores begins at the mine ...

How to Make Flux for Sulfide Ores | Hobbies, Games & Toys

How to Make Flux for Sulfide Ores. Flux is a material that is used to remove oxide film from metal. One application for flux is the soldering of metals such as copper. To make your old solder, mix ingredients with water which is boiled away.

Process to Recover Gold from Sulfide Ores - GOLD ...

May 27, 2016· This subject is a little off the topic of this website but Im trying to get some feedback on a technology I have been working on the past few years that was focused on remediation of toxic waste. I believe it has an application to recover gold from sulphide ores by eliminating the current roastin...

Nickel: smelting, producing-Metalpedia

In hydrometallurgical processes, nickel sulfide ores undergo flotation (differential flotation if Ni/Fe ratio is too low) and then 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. Then ...

Copper Ore Types: Sulfides vs. Oxides | INN

Both ore types can be economically mined, though they are processed in different ways. Copper sulfide ores are typically the most profitable types of copper ores to mine. That is because they have ...

The great sulfide mining divide: You can't save the BWCA ...

Sulfide-ore mining is dangerous everywhere and most dangerous in wet environments. And the Boundary Waters is nothing if not wet. ... MinnPost reporters take …

sulfide mines produce large amounts of solid waste. Most solid waste comes from waste rock and from ore processing byproducts. Waste rock is made up of the soil, rock and non-target materials that must be removed in order to reach and excavate the high mineral content ore. The amount of waste rock depends on the location and depth of the orebody.