Leaching of an oxide gold ore with chloride/hypochlorite …
Calcium hypochlorite produced a sluggish gold leaching kinetics, requiring twice more time (46 h) to achieve the maximum gold recovery of 58% compared to …
Calcium Hypochlorite: How to Use It to Shock Your Pool
How to Use Calcium Hypochlorite to Safely Shock a Pool. Now that you have the basic understanding of why cal hypo is the smart choice for safely shocking your pool. We have to look at the best process for completing this task. You won't have to spend all that much time or energy; the process is quite simple. ...
Use of chloride–hypochlorite leachants to recover gold from …
This study evaluated the speciation of various gold and silver chloride species to determine their stability of gold and silver in a chloride solution. Optimum …
Simulation of cyanide oxidation using calcium and …
We employed PHREEQC software to model the oxidation of cyanide using calcium hypochlorite (Ca(OCl) 2) and sodium hypochlorite (NaOCl). The results indicated that Ca(OCl) 2 . and NaOCl con - centrations, as well as pH, influenced the oxidation of cyanide. The model was run in the constant temperature of 12°C and pH between 12 to 13. By …
Cyanide and removal options from effluents in gold mining …
Chlorine can be provided in the form of gaseous chlorine or sodium or calcium hypochlorite. Lime is an alkaline agent that is commonly used for pH control. ... and the solution is neutralised with sodium hydroxide or lime and recycled back to the leaching process to re-use the cyanide. Telfer Gold Mine in a remote location of …
(PDF) Detoxification of cyanide in a gold processing plant …
Detoxification of cyanide in a gold processing plant tailings water using calcium and sodium hypochlorite (Mine Water and the Environment (2008) 27 (52-55) DOI: 10.1007/s10230-007-0024-2)
Elimination Cyanide with Hydrogen Peroxide (H2O2) and Calcium …
In this study, the elimination of cyanide by the addition of hydrogen peroxide and calcium hypochlorite was investigated. This study was conducted to determine the optimum conditions of H 2 O 2 and Ca(OCl) 2: concentration, pH and contact time, and the combined ratio of concentration H 2 O 2 with Ca(OCl) 2 to remove cyanide in gold …
Chloride-hypochlorite oxidation and leaching of refractory sulfide gold
This study evaluated the hypochlorite leaching of refractory gold ore by using the response surface method–central composite design (RSM-CCD) as a statistical approach in determining the optimum ...
Cleaner flotation separation of chalcopyrite from pyrite at …
DOI: 10.1016/j.seppur.2024.127325 Corpus ID: 268863032; Cleaner flotation separation of chalcopyrite from pyrite at low alkalinity: Based on calcium hypochlorite oxidative modification in acid mine drainage system
Calcium Hypochlorite: Should You Use This Type of
The Benefits of Cal-Hypo. It's very strong, so you'll need to use less product to reach the required level of free chlorine chlorine in your pool.; It's fast acting since it's a large, pre-dissolved amount being added to the water.; It won't damage your pool or the equipment if properly pre-dissolved and poured.; It's easy to transport, so picking up …
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Elimination Cyanide with Hydrogen Peroxide (H 2 O 2 ) and Calcium …
In this study, the elimination of cyanide by the addition of hydrogen peroxide and calcium hypochlorite was investigated. This study was conducted to determine the optimum conditions of H2O2and Ca(OCl) 2: concentration, pH and contact time, and the combined ratio of concentration H2O2 with Ca(OCl) 2 to remove cyanide in gold mining …
Dichlor vs. Calcium Hypochlorite: What's the Difference?
On the other hand, calcium hypochlorite is not recommended to be used with vinyl pools. Calcium hypochlorite is much stronger in concentration and pH than dichlor. Cal hypo does not dissolve quickly, so the cal hypo granules can sit at the bottom of the pool and damage the vinyl liner. It is best to use dichlor or sodium hypochlorite for …
Calcium Hypochlorite: How To Use It In Your Pool
When to Use Calcium Hypochlorite in Your Pool. Calcium hypochlorite usually works most effectively at night. It contains unstabilized chlorine, which quickly dissipates in sunlight.Your best bet is to shock your pool with cal hypo at dusk.. While calcium hypochlorite is an excellent solution to a dirty pool, you should still try to keep …
[PDF] Detoxification of Cyanide in a Gold Processing Plant …
DOI: 10.1007/S10230-008-0042-8 Corpus ID: 189903316; Detoxification of Cyanide in a Gold Processing Plant Tailings Water Using Calcium and Sodium Hypochlorite @article{Khodadad2008DetoxificationOC, title={Detoxification of Cyanide in a Gold Processing Plant Tailings Water Using Calcium and Sodium Hypochlorite}, author={Ali …
Gold Leaching by Sodium Chloride and Calcium …
Initially, the effect of the NaCl and Ca(OCl)2 concentrations on the gold extractions was investigated in order to determine the optimum values of concentrations of these salts. Figure 1 present the gold extractions in different concentrations of Ca(OCl)2 with the NaCl concentration set …
Use of chloride–hypochlorite leachants to recover gold …
Sodium hypochlorite provides a faster reaction rate compared to calcium hypochlorite. To have a reasonable leaching rate, ... For the treatment of the gold tailing from Sunshin Mine which is located by the sea, it has been proposed that sea water should be used for gold leaching. Most sea water has a salt content of 30–35 g/L NaCl, which is ...
Cyanide Destruction: A New Look at an Age-Old Problem
Cyanide in mining and industrial wastewaters has been around from the beginning, including electroplating processes. This presentation reviews a number of current processes, and in particular, offers new technologies for improvement in cyanide destruction by the most common process, using sodium hypochlorite.
Use of chloride–hypochlorite leachants to recover gold …
DOI: 10.1016/J.MINPRO.2007.12.003 Corpus ID: 93226910; Use of chloride–hypochlorite leachants to recover gold from tailing @article{Nam2008UseOC, title={Use of chloride–hypochlorite leachants to recover gold from tailing}, author={Kwang Soo Nam and Byoung Hi Jung and Jeon Woong An and Tae Jun Ha and Tam Tran and Myong …
Leach Gold by Sodium Hypochlorite / Chlorine & Electrolytic Oxidation
The final concentration of calcium hypochlorite going to cyanidation was less than 0.02 pct. ... During initial pilot experiments at the Carlin gold mine, it was observed that barren solutions, obtained from precipitating the gold on zinc, were inordinately high in gold content. Whereas the normal plant barren solutions may …
Hypochlorite pretreatment in heap leaching of a low …
The concept of hypochlorite treatment prior to cyanidation in the heap leaching of low grade carbonaceous gold ores is discussed. Laboratory column leach tests using a low grade carbonaceous ore were performed to investigate the effects of pH, hypochlorite consumption and concentration, and bed height on total gold extraction. …
Hydrometallurgical Recovery of Gold from Mining Wastes
Li studied the gold extraction from tailings using sulfuric acid as a pretreatment before calcium hypochlorite leaching . The obtained results showed that …
Hydrometallurgical Recovery of Gold from Mining Wastes
Li studied the gold extraction from tailings using sulfuric acid as a pretreatment before calcium hypochlorite leaching . The obtained results showed that the leaching rate of Au was 81% using 8% calcium hypochlorite, 333 K chlorination temperature and 2 h chlorination time [ 39 ].
Calcium Hypochlorite [Ca(ClO)2]
What is Calcium Hypochlorite? Calcium hypochlorite is a chemical compound that has the formula Ca(ClO) 2. It is commonly referred to as bleaching powder or calcium oxychloride. It is an ionic compound that is made up of a calcium cation (Ca 2+) and two hypochlorite anions (ClO –).Despite being quite stable at room temperatures, calcium …
Detoxification of Cyanide in a Gold Processing Plant
In our last issue of Mine Water and the Environment (March 2008) the keywords of the following paper were missing and some smaller typos were found. We apologize for any inconvenience this might have caused. Keywords Calcium hypochlorite · Cyanide detoxification · Gold-processing waste water · Sodium hypochlorite · …
Calcium Hypochlorite
Group 17 (H, F, Cl, Br, I) Alkaline Earth Compounds. R.C. Ropp, in Encyclopedia of the Alkaline Earth Compounds, 2013 Calcium Hypochlorite. Calcium hypochlorite has the molecular formula of Ca(ClO) 2 and a molecular weight of 142.974 g/mol. Its CAS number is 7778-54-3. Its specific gravity is 1.21 g/cm 3.When dissolved in water, it can provide …
Cleaner flotation separation of chalcopyrite from pyrite at …
Download Citation | On Apr 1, 2024, Jiaqiao Yuan and others published Cleaner flotation separation of chalcopyrite from pyrite at low alkalinity: Based on calcium hypochlorite oxidative ...
CHLORIDE HYPOCHLORITE OXIDATION AND …
The effects of calcium hypochlorite ... neous oxidative pretreatment and gold leaching of a sulfide concentrate using the chlo- ... (Barika Mine in Sardasht). Flotation was conducted at 25°C with
Simulation of cyanide oxidation using calcium and sodium hypochlorite …
N. Kuyucak, A. Akcil, Cyanide and removal options from effluents in gold mining and metallurgical processes, Miner. ... oxygen generated by the reaction between hydrogen peroxide and hypochlorite, Miner. ... in a gold processing plant tailings water using calcium and sodium hypochlorite, Mine Water Environ., 27 (2008) 52–55. ...
Hypochlorite Leaching of Gold Ore
Leaching pure gold with an acidic sodium hypochlorite solution has been demonstrated to be effective. The initial rate of gold dissolution was extremely rapid. In a …