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copper leaching with sodium hypochlorite

Leaching of chalcopyrite with sodium hypochlorite

sodium hypochlorite to propose an economical and environmentally friendly industrial process for recovery of copper. The objectives are: 1. To determine the effects of following parameters on the leaching rate/ conversion of chalcopyrite with sodium hypochlorite. • Temperature, • Initial pH,

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Molybdenum removal from copper ore concentrate by sodium ...

Jan 01, 2011  The removal of molybdenum from a copper ore concentrate by sodium hypochlorite leaching was investigated. The results show that leaching time, liquid to solid ratio, leaching temperature, agitation speed, and sodium hypochlorite and sodium hydroxide concentrations all have a significant effect on the removal of molybdenum.

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"Leaching of chalcopyrite with sodium hypochlorite" by ...

Chalcopyrite is the most important copper mineral source and also a refractory mineral for leaching. Several processing routes have been proposed to overcome the environmental problems related to copper extraction from chalcopyrite. In this study, the leaching of chalcopyrite has been investigated with a new reagent sodium hypochlorite (NaOCl).

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Leaching of chalcopyrite with sodium hypochlorite - NASA/ADS

Chalcopyrite is the most important copper mineral source and also a refractory mineral for leaching. Several processing routes have been proposed to overcome the environmental problems related to copper extraction from chalcopyrite. In this study, the leaching of chalcopyrite has been investigated with a new reagent sodium hypochlorite (NaOCl).

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Bleach (aka Sodium Hypochlorite) + Copper [H]ardForum

Aug 02, 2007  680. if your copper gets tarnished use a sodium bisulfate solution to clean it right off. More commonly used as a pool cleaning chemical available everywhere. You can use it cold or heat it up and it works awesome. It'll turn the copper a flat pinkish color that is easily polished away. It's a metalworkers trick.

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"Leaching of chalcopyrite with sodium hypochlorite" by ...

Chalcopyrite is the most important copper mineral source and also a refractory mineral for leaching. Several processing routes have been proposed to overcome the environmental problems related to copper extraction from chalcopyrite. In this study, the leaching of chalcopyrite has been investigated with a new reagent sodium hypochlorite (NaOCl).

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Leaching of chalcopyrite with sodium hypochlorite - NASA/ADS

Chalcopyrite is the most important copper mineral source and also a refractory mineral for leaching. Several processing routes have been proposed to overcome the environmental problems related to copper extraction from chalcopyrite. In this study, the leaching of chalcopyrite has been investigated with a new reagent sodium hypochlorite (NaOCl).

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Selective leaching of penalty elements from copper ...

Nov 01, 2016  Hypochlorite leaching is another leach system developed for the selective extraction of As from copper concentrates (Curreli et al., 2005, Mihajlovic et al., 2007, Viñals et al., 2003). In most studies hypochlorite leaching is carried out at atmospheric pressure, at relatively low temperatures (20–60 °C), and at alkaline pH (pH 12–12.5).

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Leaching of Chalcopyrite with Sodium Hypochlorite ...

Dec 24, 2009  A laboratory study was conducted on the leaching of chalcopyrite with NaOCl (sodium hypochlorite). Experiments were carried out in the following two stages: (1) Chalcopyrite was converted to CuO (cupric oxide) with a sodium hypochlorite solution, and (2) cupric oxide was dissolved to cupric ions with 1 normal sulfuric acid at room temperature. In the first-stage leaching, the initial pH varied ...

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CHLORIDE HYPOCHLORITE OXIDATION AND LEACHING OF

During leaching of concentrate by the chloride/hypochlorite solution, the changes of pH and ORP were detected to determine the optimum calcium hypochlorite concen-tration, sodium chloride concentration and initial pH. Effect of hypochlorite concentration The calcium hypochlorite powder, at various amounts of 2.5, 5, 10, 15, 20 and 25 g,

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Sodium Hypochlorite Handbook - Occidental Petroleum

Fifteen weight percent sodium hypochlorite will decompose approximately 10 times faster than 5 wt% sodium hypochlorite at 25°C. The pH has a significant effect on the stability of sodium hypochlorite solutions. Below pH 11 the decomposition of sodium hypochlorite is significant due to the shift in the equilibrium in favor of the more

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How to Use Bleach on Gold Ore to Remove Gold Sciencing

Apr 24, 2017  This was the first commercial method used for gold extraction. Place the ore into the mortar and grind it to the size of sand grains. Put the ore grains into a plastic bowl. Add the 35-percent hydrochloric acid to the sodium hypochlorite bleach into a flask or beaker, in a two-to-one ratio of acid to bleach. Ensure that the liquid mixture is at ...

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Optimization of the arsenic removal process from enargite ...

gite leaching with sodium hypochlorite, because the process is technically attractive in terms of its potential use in a commercial scale based on the previous inves-tigations of this matter. Selective oxidative alkaline leaching solution of enargite with hypochlorite may be used to remove arsenic from copper concentrates.

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Chlorination Leaching of Refractory Ores - Hydrometallurgy ...

If I understand it correctly, sodium chloride and calcium hypochlorite were each added to the leaching solutions at about 200 dm3. Initial pH was best at 11 and declined. The optimum pH to maintain HOCL in solution is 3.5-7.5.

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The leaching and adsorption behaviour of gold ores

4.3 CYANIDE LEACHING OF THE COPPER CONCENTRATE 92 4.3.1 The effect of copper 101 4.3.2 The role of iron 106 4.3.3 The role or nickel 107 4.3 .4 The role of silver 109 4.3.5 Theroleofzinc 109 4.4 THE EFFECT OF COPPER CYANIDE ON GOLD LEACHING FROM OXIDE AND SULPHIDE ORES 110 4.5 SUMMARY 114 CHAPTERS PREG-ROBBING PHENOMENA IN THE

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CN104294057A - Method for extracting gold from copper ...

The invention discloses a method for extracting gold from copper-oxide oxidized gold ores. The method comprises the following steps: 1, carrying out ammonia-cyanide leaching on the copper-oxide oxidized gold ores to obtain an ore pulp; 2, adding hypochlorite into the ore pulp, and stirring to remove copper in order to obtain a copper removed ore pulp; 3, carrying out countercurrent washing on ...

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Hypochlorite Leaching Of Gold Ore - Sisters Act,Johannesberg

Mining Copper Leaching With Sodium Hypochlorite. 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 aerating the mixture ...

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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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Chemical Compatibility Guide - Polyethylene

Copper Cyanide L Rust Inhibitors L Copper Nitrate L Sea Water L . Polyethylene Chemical Compatibility Guide Page 4 of 5 Copper Sulfate L Selenic Acid L ... Dimethylamine S Sodium Hypochlorite L Dimethyl Formamide S Sodium Iodide L Dinonyl Phthalate N Sodium Nitrate L Dioctyl Phthalate N Sodium Oxalate L

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Leaching of Chalcopyrite with Sodium Hypochlorite ...

Sep 01, 2011  Chalcopyrite is the most important copper mineral source and also a refractory mineral for leaching. Several processing routes have been proposed to overcome the environmental problems related to copper extraction from chalcopyrite. In this study, the leaching of chalcopyrite has been investigated with a new reagent sodium hypochlorite (NaOCl).

Read More
Adsorption characteristics of CN− species on the ...

Jul 19, 2021  Lv et al. used sodium hypochlorite as an oxidant to eliminate residual cyanide and used Cu−Pb bulk flotation process to treat the cyanide tailings from Shandong Province, China, and obtained a copper concentrate with grade of 13.17% and recovery of 70.00%. This is a great progress compared with the original copper grade of 0.21%.

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Chlorination Leaching of Refractory Ores - Hydrometallurgy ...

If I understand it correctly, sodium chloride and calcium hypochlorite were each added to the leaching solutions at about 200 dm3. Initial pH was best at 11 and declined. The optimum pH to maintain HOCL in solution is 3.5-7.5.

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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 household cleaner, a disinfectant, and a bleaching agent. It is also used in water treatment and purification. Reasons for Citation

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THE CYANIDE HEAP LEACHING BEHAVIOR OF CUPRIFEROUS

5.2 Leaching with copper cyanide solutions 125 5.2.1 Presentation of the copper behavior 125 5.2.2 The behavior of gold 130 ... Table 3-12 Calculations for determining the amount of required 12% sodium hypochlorite solution to oxidize the waste cyanide solutions 74 . IX

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Sodium Hypochlorite (Bleach) Storage Tanks Specifications

Sodium Hypochlorite Storage Tanks are manufactured from HDPE, XLPE, and FRP materials at 1.9 specific gravity. Secondary containment is required. Bleach is best stored out of direct sunlight, at temperatures below 60°F, filtered and diluted with pH kept above 10.

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The leaching and adsorption behaviour of gold ores

4.3 CYANIDE LEACHING OF THE COPPER CONCENTRATE 92 4.3.1 The effect of copper 101 4.3.2 The role of iron 106 4.3.3 The role or nickel 107 4.3 .4 The role of silver 109 4.3.5 Theroleofzinc 109 4.4 THE EFFECT OF COPPER CYANIDE ON GOLD LEACHING FROM OXIDE AND SULPHIDE ORES 110 4.5 SUMMARY 114 CHAPTERS PREG-ROBBING PHENOMENA IN THE

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Sodium Hypochlorite 16 - BLEACHTECH

16.0 max. Sodium Chlorate as NaClO3 ppm. 2500 Max. Appearance: Clear greenish-yellow liquid miscible in any proportion with water. This product meets the requirements of NSF standard 60 for drinking water. Issue Date 5-05-2015. BleachTech LLC. 2020 Bessemer Road Petersburg, VA 23805. Iron as Fe, ppm. Nickel as Ni, ppm.

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How to Use Bleach on Gold Ore to Remove Gold Sciencing

Apr 24, 2017  This was the first commercial method used for gold extraction. Place the ore into the mortar and grind it to the size of sand grains. Put the ore grains into a plastic bowl. Add the 35-percent hydrochloric acid to the sodium hypochlorite bleach into a flask or beaker, in a two-to-one ratio of acid to bleach. Ensure that the liquid mixture is at ...

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Is Pressure Treated Wood safe or not?

Dec 27, 2015  On January 1, 2004 the wood industry throughout North America has ceased to produce pressure treated wood treated with CCA (chrome, copper and arsenic) for residential use, replacing this chemical with what is generically called 'non-arsenic' treatments, primarily ACQ and Copper Azole (CA), both of which contains no arsenic but much more copper. In 2013 a different technology, MicroPro ...

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How is Molybdenum Extracted - samaterials

Sodium hypochlorite leaching method: mainly used for leaching low-grade ore tailings. In the leaching process, sodium hypochlorite itself will slowly resolve oxygen, some other metal sulfides will be oxidized by sodium hypochlorite hydroxide ion, these metals will precipitate and promote the production of molybdate, molybdenum solution returned ...

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Sodium Hypochlorite Handbook - Occidental Petroleum

Fifteen weight percent sodium hypochlorite will decompose approximately 10 times faster than 5 wt% sodium hypochlorite at 25°C. The pH has a significant effect on the stability of sodium hypochlorite solutions. Below pH 11 the decomposition of sodium hypochlorite is significant due to the shift in the equilibrium in favor of the more

Read More
Hypochlorite Leaching Of Gold Ore - Sisters Act,Johannesberg

Mining Copper Leaching With Sodium Hypochlorite. 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 aerating the mixture ...

Read More
CHLORIDE HYPOCHLORITE OXIDATION AND LEACHING OF

During leaching of concentrate by the chloride/hypochlorite solution, the changes of pH and ORP were detected to determine the optimum calcium hypochlorite concen-tration, sodium chloride concentration and initial pH. Effect of hypochlorite concentration The calcium hypochlorite powder, at various amounts of 2.5, 5, 10, 15, 20 and 25 g,

Read More