تعتبر شركة Olux شركة رائدة ومتميزة على المستوى الدولي في مجال البحث والتطوير وتصنيع وبيع محطات التكسير والغربلة واسعة النطاق ومعدات الطحن الصناعية ومصانع الاستفادة.
I picked up some honeycomb. I plan on leaching it in hot HCl-Clorox. What do I need to do before I begin the leach? If there is already a post on the subject please let me know. I can't seem to find anything detailed on honeycomb in HCl-Clorox. (I must say, PGMs don't hold the same allure...
WhatsApp: +86 18221755073
The recovery percentages R% are higher in 0.001 M than in the range 0.1–6 M HCl for the gold(III) ions. 3.2. Extraction Studies of Au(III) Using Cyanex 272 in Toluene. The extraction percentage (E%) for gold(III) were calculated from: ... In addition to acidic solutions, cyanides are also used for gold leaching . Cyanide is considered to be a ...
WhatsApp: +86 18221755073
Chlorine gas dissolved in water becomes hypochlorous acid (HOCl) and hydrochloric acid (HCl). It is not necessary to have an extremely low pH, as in the "Acid/Clorox" …
WhatsApp: +86 18221755073
by "most" if you mean iron, then yea, most of the iron will be removed. everything else will stay as is. you have to understand that iron will be the most troublesome element to a successful leaching process. by removing the iron, it should be somewhat easier. if you have free standing gold in the black sands, leaching will work to recover the largest portion. of coarse if …
WhatsApp: +86 18221755073
While gold will go into solution at extremely low pH's, iron oxides will also release iron and put it into solution at very low pH's, as well. This is why the promoters of the modern HCl/Clorox method, with a 4:1 ratio of HCl to Clorox, insist that all forms of iron be removed from your ore prior to leaching.
WhatsApp: +86 18221755073
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 ...
WhatsApp: +86 18221755073
During the gold leaching process a mixture of pool acid and bleach produces chlorine that is used to dissolve gold as follows: NaOCℓ + 2HCℓ Þ NaCℓ + H2O +... Forums. New posts Search forums. ... which is a consumption of approximately 62.7 ml of pure bleach and 30 ml of pure HCl. Normaly 15% sodium hyphochlorite and 33% hydrochloric acid ...
WhatsApp: +86 18221755073
What would happen if I covered pentium pros (cracked or whole) with a HCl-Clorox mixture? Has anyone ever tried something like this?
WhatsApp: +86 18221755073
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 …
WhatsApp: +86 18221755073
A leaching process was established based on the ability of platinum-group metals to form stable chloro-complexes in acidic chloride solutions. Industrial catalyst losses were examined for the recovery of platinum, palladium, and rhodium by leaching with a mixture of sulfuric acid and sodium chloride to avoid using aqua regia or autoclave conditions. Extraction of platinum and …
WhatsApp: +86 18221755073
The leaching of gold from copper leach residues reached 99 % efficiency at 40 °C for 90 min. Based on this, Lu et al. optimized the pretreatment of copper removal as well as parameters of gold leaching using a mixture of NaClO 3, H 2 SO 4, and NaCl for further separation and recovery of gold using liquid–liquid extraction (LLE) and ...
WhatsApp: +86 18221755073
You used way too much NaOH. You only need a fraction of a gram. Any more and you waste HCl making it active (acidic) again. Next time start small. Use just enough water to cover the CPU and add a proportional amount of Iodine. To precipitate the Gold, add small increments of NaOH solution until you see the black Gold powder precipitate.[/quote]
WhatsApp: +86 18221755073
variable, That was so many questions at once I do not think I could answer them all, if you have many questions you should spend more time studying and doing small experiments. I will not try to answer the questions, but I will try to get you to see something I …
WhatsApp: +86 18221755073
The first,and MOST important objective,is to establish that you in fact have gold in your material.There is nothing to be gained by removing base matals,and iron,if there are no values to be recovered. You need to start by determining that you have the precious metal(s) you desire first.A small test with AR will determine that. You stand to gain nothing from wasting …
WhatsApp: +86 18221755073
The environmental hazards and toxicity of cyanide have increased the interest in a new cyanide-free gold process (Aylmore, 2005).The typical challenges related to the new development-stage cyanide-free gold processes are related to the high costs of chemicals, selectivity for gold leaching, and final gold recovery from the solutions (Hilson and Monhemius, …
WhatsApp: +86 18221755073
So, you want to cover your material with 'enough' HCl, then add your bleach in small quantities until all the Gold is dissolved. I work with HNO3, so I don't have a good feeling for how-much bleach. With HNO3 I know that it …
WhatsApp: +86 18221755073
Treatment of carbonaceous gold ores from north central Nevada with sodium hypochlorite or chlorine, or by electrolytic oxidation resulted in favorable gold recovery by …
WhatsApp: +86 18221755073
i have a lot of spent powder from which i extracted gold, palladium,silver by the tradicional methods--as this time of the year i have less work then usual, i decided to make a ssn leach in some of this powder---not knowing if i had pms in the solution and curious of how long it takes to leach this powder (first time that i did this experiment)----after 2hours of leaching,itook …
WhatsApp: +86 18221755073
150 g ore added to 1 L pH 0.5 HCl solu tion at 40° C. ... rea and brine leaching experiments to recover gold, silver, and lead. In these tests, 350 g FeC13'6H20 was added to 3,500 mL of deionized water (acidified with 45 mL of concentrated HC-l)- -and heated to 40° C in a 4-L beaker. Dried, minus 200-mesh material (175 g) was mixed ...
WhatsApp: +86 18221755073
Gold leaching using thiourea (0.4 M thiourea, pH 1.5, 3 h) following pretreatment using HCl and Citrate and no pretreatment, M. Reprinted with perimission from [66]
WhatsApp: +86 18221755073
The aim of this study was to realize gold leaching from copper anode slime (CAS) with ionic liquid treatment. A novel medium, 1-butyl -3-methyl-imidazolium chloride (BmimCl), was used as the ...
WhatsApp: +86 18221755073
Your gold will now slowly settle to the bottom as a black powder. Or, you can filter the solution through a fine filter to recover the gold. Great, we got a whole bunch of gold but if we lose that iodine we are still going to be in the hole. Remember, at this point it don't look like iodine but it is still there.
WhatsApp: +86 18221755073
Gold extraction to the pressure oxidation leach solution is rapid and complete in one stage, thus eliminating the need for further cyanidation. More than a century ago, gold ores were treated …
WhatsApp: +86 18221755073
I put an oz of gold amalgam in some 30% hydrochloric acid to clean some dark stain on it but the hydrochloric acid turned yellow immediately. ... I put a .23 gram flake of the stuff in hcl/cl leaching solution. ... gram flake when it was first in the leaching solution. the silver precipitate disappeared after I dumped a bunch more clorox in ...
WhatsApp: +86 18221755073
When processing pins you should use just HCl alone for the first step as it dissolves all the base metals while leaving the gold intact.never use the HCl H2O2 method to do the primary stripping of any gold plated item as you may put the gold into solution with the other metals.I always do the prelininary stripping with HOT HCl in a crockpot setup as shown in my …
WhatsApp: +86 18221755073
This is not to say chlorine was not an effective method for leaching gold, it was simply that cyanide was a simpler and more inexpensive method. ... The most important thing to know about the HCl/Clorox method is that this was NOT the chlorine method employed to recover gold from ores in the 1890's. By using so much hydrochloric acid, the pH is ...
WhatsApp: +86 18221755073
The gold leaching was performed in a liquid culture medium that contained sulfide ore with a gold content of 0.26 wt%, the marine broth, and potassium iodide. The test was conducted in a pulp density of 3.3 w/v% for 30 days at 30 °C. One type of the isolated bacteria ...
WhatsApp: +86 18221755073
When combined with hydrochloric acid, the mixture produces chlorine that dissolves gold from gold ore. This was the first commercial method used for gold extraction. …
WhatsApp: +86 18221755073
Trying to adapt the HCl/Clorox method, designed for refining gold, to leaching gold from ore is a waste of time. Plus, you will lay out more money in acid to try and remove base …
WhatsApp: +86 18221755073
The black sands I say forget about trying to leach gold from them, pan the gold out of them, then if you wish make iron from the black sands (probably easier than getting the small amount of gold they may contain, the gold would be an impurity in the iron, so when the iron is forged check the slag in your blacksmith shop for value. this was ...
WhatsApp: +86 18221755073
Two-stage leaching was carried out: first to eliminate manganese from the sample using sodium sulfite (Na2SO3) as a reductive reagent and sulfuric acid (H2SO4) and a second stage to dissolve silver and gold with sodium hypochlorite (NaClO) and hydrochloric acid (HCl); the results show extraction around 96% for Mn and 98.73% and 83% of Ag and Au ...
WhatsApp: +86 18221755073
I havent done the hcl/clorox as of yet as I bought cheap filters that ended up dissintegrating and my current mush is paper and gold junk basically due to filter disolving apart...going to reclean with hcl/peroxide but doesnt really get ride of paper content in it.
WhatsApp: +86 18221755073
Research on the leaching of gold by thiourea has been reported extensively in the literature, but research on the recovery of gold from leach solutions has not been well documented. Some methods for recovering gold-thiourea complex reported in the current literature include electrochemical, activated carbon adsorption, ion-exchange adsorption ...
WhatsApp: +86 18221755073
Hi to everyone, thank you for a very informative forum. i have a great deal to learn for you all. Please excuse my current lack in expertise, i am just starting out and getting my head around things. i have always been a practical learner …
WhatsApp: +86 18221755073
On the other side of the coin, gold won't dissolve in nitric acid. Although nitric is an oxidizing acid, it won't dissolve gold since gold doesn't form a nitrate, except under unusual conditions. When you add HCl to the nitric to form aqua regia, you provide Cl-, which combines with the gold to form a complex ion in solution.
WhatsApp: +86 18221755073
This is in direct contradiction to the HCl/Clorox leaching method where we are told copious amounts of HCl must be added to lower the ph to 1-2. Sodium hypochlorite bleach exists only because sodium hydroxide (a base - NaOH) is added to bleach to raise the ph to over 12, preserving the NaClO and preventing it from becoming hypochlorous acid.
WhatsApp: +86 18221755073