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oxide gold hypochlorite

The reasons of gold refractory, Gold ore classification ...

Nov 28, 2016· I. The reason of the gold mineral refractory There are so many types of reasons that caused the difficulty of gold ore processing, including physical element, chemical element, and …

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Sodium hypochlorite pretreatment for heap leaching gold ore

When the sodium hypochlorite pretreatment was followed by cyanidation, greater than 85 per cent gold extractions were achieved. Gold extraction was shown to be dependent on sodium hypochlorite concentration, heap leach flowrate, temperature and leaching time or bed volumes.

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How to Leach Gold Ore With Chlorination | Sciencing

Apr 25, 2017· How to Leach Gold Ore With Chlorination ... The mixture should be 15 percent sodium hypochlorite and 33 percent hydrochloric acid. The mixture should cover the rocks, so multiply the mixture until the rock is covered. Insert the ORP meter so the probe side is in the water mixture. An ORP meter is used to measure oxidation, which is required to ...

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Hypobromite - Wikipedia

The hypobromite ion, also called alkaline bromine water, is BrO −.Bromine is in the +1 oxidation state.Hypobromite is the bromine compound analogous to hypochlorites found in common bleaches, and in immune cells. In many ways, hypobromite functions in the same manner as hypochlorite, and is also used as a germicide and antiparasitic in both industrial applications, and in the immune system.

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SODIUM HYPOCHLORITE SOLUTION WHMIS CONTROLLED …

Sodium hypochlorite solutions attack some plastics (such as nylon, Bisphenol A-fumarate and isophthalic polyesters), elastomers (such as soft rubber, neoprene and nitrile Buna-N) and coatings (such as coal tar epoxy, epoxy and vinyls). Sodium hypochlorite solutions do not attack acrylonitrile-butadiene-styrene (ABS), Butyl rubber,

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Leaching of an oxide gold ore with chloride/hypochlorite ...

An oxide gold ore was subjected to chloride/hypochlorite leaching at room temperature. The effects of three factors, including Ca(OCl) 2 vs. NaOCl, OCl − concentration, and HCl concentration on gold leaching performance were investigated. Due to formation of CaOCl + complex in solution and hence less reactivity, calcium hypochlorite produces a sluggish gold leaching kinetics, taking twice ...

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CHEMICAL RESISTANCE CHART - Plastic Buckets

CHEMICAL RESISTANCE CHART RATINGS — CHEMICAL EFFECT A — No effect—Excellent ... PTFE Polyphenylene Oxide ... Gold Monocyanide AD A B — Minor effect — Good 2. Polypropylene — Satisfactory to 72° F. ...

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Advances in Gold and Silver Processing

HYPOCHLORITE LEACHING OF GOLD ORE 69 Overall reaction of equations (I), (2) and (3) can be summarized as follows: It is obvious that both hydrochloric acid and sodium chloride have affected the gold dissolution in hypochlorite solution. RESULTS AND DISCUSSION Gold Precipitate The dissolution of gold in dilute hypochlorite solution is very slow.

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Sodium Hypochlorite Handbook

hypochlorite, the active ingredient in bleach. The molecular formula for sodium hypochlorite is NaOCl. Na+ + OCl- NaOCl sodium hypo- sodium cation chlorite hypochlorite anion The most common method for producing sodium hypochlorite is to react chlorine …

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Byproduct Mercury Production in Modern - EPA Archives

recovery of elemental gold and silver. Retorts are the primary source of byproduct production in oxide gold mines. The primary use of retorts is for mercury removal from gold and silver. Dore Furnaces: Residual mercury can be released during dore furnace treatment, where the ore is

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CHEMICAL RESISTANCE CHART - Plastic Buckets

302 Stainless Steel 304 Stainless Steel 316 Stainless Steel 440 Stainless Steel Aluminum TITANIUM NICKEL ALLOY C276 (HASTELLOY Cast Bronze Brass Cast Iron Carbon Steel POLYVINYLIDENE FLOURIDE (KYNAR) PVC (Type 1) Tygon (E-3606) PTFE Polyphenylene Oxide (Noryl

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Advanced Chemical Formula Nomenclature for Chem 1A (2 of 2 ...

Ionic compounds, polyatomic ions, hydrated ionic coumpound, molecular compounds, binary acids and oxyacids

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Leaching of an oxide gold ore with chloride/hypochlorite ...

Jun 01, 2007· Leaching of an oxide gold ore with chloride/hypochlorite solutions Leaching of an oxide gold ore with chloride/hypochlorite solutions Baghalha, Morteza 2007-06-01 00:00:00 An oxide gold ore was subjected to chloride/hypochlorite leaching at room temperature. The effects of three factors, including Ca(OCl) 2 vs. NaOCl, OCl − concentration, and HCl concentration on gold leaching …

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US3639925A - Recovery of gold from carbonaceous ores ...

Carbonaceous gold ores are rendered amenable to a conventional cyanide recovery process by pretreatment with sodium hypochlorite or calcium hypochlorite compounds at temperatures under 70* C. Hypochlorite solutions can be generated in situ by electrolysis of chloride solutions.

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A Comparative Study of Cyanide and Chloride – Hypochlorite ...

An oxide gold ore from Placer, Surigao Del Norte was subjected to chloride-hypochlorite and cyanide leaching at room temperature at 3 different hours – 4 hours, 12 hours and 24 hours. This project characterized the ore used and assessed the effects

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sulfide and oxide gold ore - weekendschool-denhelder.nl

Leaching of an oxide gold ore with … An oxide gold ore was subjected to chloride/hypochlorite leaching at room temperature. The effects of three factors, including Ca(OCl) 2 vs. NaOCl, OCl − concentration, and HCl concentration on gold leaching performance were investigated.

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CA1245459A - Sulfide as a hypochlorite kill agent - Google ...

ABSTRACT Residual hypochlorite contained in chlorinated slurries of either carbonaceous gold-containing ores or mixtures of carbonaceous and oxide gold-containing ores are reduced by reaction with sulfide ion-providing chemical compounds preferably sodium hydrosulfide, sodium sulfide or hydrogen sulfide. The hypochlorite "kill" step enables subsequent cyanide leach operations to be …

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The reasons of gold refractory, Gold ore classification ...

Nov 28, 2016· The reasons of gold refractory, Gold ore classification, and preprocessing methods. Published on November 28, 2016 November 28, 2016 • 59 Likes • 9 Comments

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A Method for Leaching or Dissolving Gold from Ores or ...

leaching step to produce a gold-bearing solution as an intermediate product while the recycling of secondary gold from electronic and precious metal scrap is based on the selective and fast dissolu-tion of the precious metal. Therefore, A Method for Leaching or Dissolving Gold from Ores or …

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Chloride-hypochlorite oxidation and leaching of refractory ...

PDF | In this research, oxidation of sulfide minerals and leaching of gold from a gold bearing sulfide concentrate using chloride hypochlorite solution was investigated. The effects of calcium ...

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(PDF) Leaching of Chalcopyrite with Sodium Hypochlorite ...

the number of moles of hypochlorite consumed to leach Furthermore, the former case has an option to dissolve 1 mole of chalcopyrite—is 8.5. Because the first stage copper oxide only, which leaves the layers of ferric oxide leaching is carried at a high pH, the …

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Sodium hypochlorite - Wikipedia

Sodium hypochlorite is a chemical compound with the formula NaOCl or NaClO, comprising a sodium cation (Na +) and a hypochlorite anion (OCl − or ClO −). It may also be viewed as the sodium salt of hypochlorous acid. The anhydrous compound is unstable and may decompose explosively. It can be crystallized as a pentahydrate NaOCl ·5 H

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Renee Alexis Taladua | Mindanao State University - Iligan ...

A Comparative Study of Cyanide and Chloride – Hypochlorite Gold Leaching of Oxide Ore from Placer, Surigao Del Norte more. by Renee Alexis Taladua. An oxide gold ore from Placer, Surigao Del Norte was subjected to chloride-hypochlorite and cyanide leaching at room temperature at 3 different hours – 4 hours, 12 hours and 24 hours. This ...

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Chloride–hypochlorite leaching of gold from a mechanically ...

Jun 01, 2013· Read "Chloride–hypochlorite leaching of gold from a mechanically activated refractory sulfide concentrate, Hydrometallurgy" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

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Right to Know Hazardous Substance Fact Sheet

Sodium Hypochlorite is a clear, slightly yellow or green liquid with a strong Chlorine odor. It is usually mixed in water and used as a cleaner, a disinfectant, and a bleaching ... Sodium Oxide and Chlorine. f Use water spray to keep fire-exposed containers cool. f Sodium Hypochlorite may ignite combustibles (wood,

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40 CFR § 117.3 - Determination of reportable quantities ...

The number in parentheses is the metric equivalent in kilograms. For convenience, the table contains a column headed "Category" which lists the code letters "X", "A", "B", "C", and "D" associated with reportable quantities of 1, 10, 100, 1000, and 5000 pounds, respectively.

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Leaching of an oxide gold ore with chloride/hypochlorite ...

An oxide gold ore was subjected to chloride/hypochlorite leaching at room temperature. The effects of three factors, including Ca(OCl)2 vs. NaOCl, OCl− concentration, and HCl concentration on ...

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STANDARD THERMODYNAMIC PROPERTIES OF …

STANDARD THERMODYNAMIC PROPERTIES OF CHEMICAL SUBSTANCES This table gives the standard state chemical thermodynamic properties of about 2400 individual substances in the crystalline, l iquid, and gaseous states.

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Quia - Ionic Compounds - Names and Formulas

From a list of almost 2000 names and formulas, students will be given the opportunity to practice their ability to name ionic compounds, given the formula, and determine the formula given the name.

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CHLORIDE HYPOCHLORITE OXIDATION AND LEACHING OF …

Chloride–hypochlorite oxidation and leaching of refractory sulfide gold concentrate 63 Fig. 1. The Pourbaix diagram of Fe–S at [Fe] –= 10 4 M, [S] = 10– M and 25 C (the chlorine species regions are also marked) (Marsden and House, 2005) Fig. 2.

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