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The advantages of gold electrolytic unit include：
1、High purity: Electrolytic refining can result in gold purity of 99.99% or higher.
2、High efficiency: Compared to other refining methods, electrolytic refining can extract gold quickly and efficiently.
3、Non-toxic: Most of the chemicals used in the electrolytic refining process are non-toxic and non-hazardous substances, which are not harmful to the environment and human body.
4、Controllable: The process of electrolytic refining can be precisely controlled so that the purity and shape of the gold produced can be adjusted as required.
5、Wide applicability: Electrolytic efining is applicable to all kinds of gold content metals, from high grade gold ores to low grade gold bearing scrap.
Advantages of gold refinery machines:
(1) Casting anode plate: the crude gold raw material with 99% gold content is melted into the medium frequency smelting furnace and cast into a gold electrolytic anode plate.
(2) Electrolyte preparation and waste electrolyte recovery: gold electrolyte is prepared by dissolving pure gold in aqua regia and diluting it with hydrochloric acid aqueous solution.
(3) Electrolysis: hang the anode plate into the gold electrolysis cell and start the gold electrolysis equipment for electrolysis.
The company's high-efficiency gold electrolysis unit (as shown in the figure) is developed based on years of experience in gold refining projects and customer suggestions. It adopts integrated and integrated design. The whole machine includes a single electrolytic cell, circulating pump, rectifier power supply, automatic electrolyte replenishment system, electrolytic flue gas condensation recovery system, electrolyte temperature, voltage, current The copper bar temperature intelligent monitoring system, the rectifier power supply is closed separately, isolated from the acid gas in the workshop, and has a long service life.
With a number of domestic patents and advanced technology, it has the following advantages:
① The product quality is stable and can meet the gold ingot standard of au99.99 (grade I) of Shanghai Gold Exchange; it can also produce gold ingots with purity of 99.999% according to the special needs of customers;
② Low production cost: about 0.02 yuan / gram gold;
③ The electrolysis adopts AC / DC superimposed power supply, which can effectively inhibit the generation of silver chloride on the gold anode and make the anode plate electrolysis more thorough;
④ High current density electrolysis technology; cathode current density up to 1200A / m2, high production efficiency;
⑤ The electrolytic cell is designed with a transparent closed smoke cover to prevent smoke from escaping, which is easy to operate and beautiful;
⑥ A flue gas condensing device is set. Due to the high temperature (60-70 ℃) required by the gold electrolysis process, the flue gas condensing device can condense the reflux volatile electrolyte to avoid the loss of gold;
The main material of the equipment is high performance polypropylene material, adding anti-aging agent to the material, which greatly prolongs the service life of the equipment. The whole bracket material is PPH, and the corrosion resistance is very strong; the cathode and anode conductive bar material is titanium coated copper with excellent conductivity.
This set of gold electrolysis unit is designed with PLC automatic operation system, controlled by touch screen, and has the function of electrolytic parameter storage. When the electrolytic voltage, current and copper bar temperature are abnormal, the rectifier power supply can be directly interlocked to stop. The whole set of equipment is simple, safe and convenient.
model number | external dimensions | ability to precipitate pure gold | power(kw) | power supply | material |
JQ-JDJ-2.5 | 1000*700*1800mm | 2.5kg/d | 2 | 380V | PPH |
JQ-JDJ-5 | 1000*700*1800mm | 5kg/d | 2 | ||
JQ-JDJ-10 | 1100*700*1800mm | 10kg/d | 4 | ||
JQ-JDJ-20 | 1700*800*1800mm | 20kg/d | 6 |
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What are the chemical refining methods for goldWhat are the chemical refining methods for goldAnswer: The chemical refining of gold mainly adopts processes including concentrated sulfuric acid boiling leaching, nitric acid silver parting, aqua regia gold parting, chlorination gold parting, and reduction with oxalic acid or sodium sulfite.
1、The concentrated sulfuric acid boiling leaching method uses concentrated sulfuric acid for long-term leaching and boiling at high temperatures. It converts base metals such as silver and copper in the alloy into sulfates for removal, so as to achieve the purpose of gold purification.
2、The nitric acid silver parting method features a fast reaction rate and high saturation concentration of silver in the solution. It is generally carried out under autothermal conditions (no heating is required, or heating can be applied at the later stage to accelerate dissolution), so it is widely used in industrial production.
3、The aqua regia gold parting method is suitable for refining crude gold with a silver content of less than 8%. During the process, gold dissolves into the solution, while silver forms silver chloride (AgCl) precipitate and is separated out. The platinum group metals (PGMs) contained in the solution are subsequently separated and recovered.
4、The feedstock for oxalic acid reduction refining is usually crude gold or crude gold powder obtained from the enrichment stage, and a gold grade of around 80% is sufficient. First, the crude gold powder is dissolved to transfer gold into the solution. After adjusting the acidity of the solution, oxalic acid is used as the reducing agent to reduce gold ions into pure sponge gold. Following acid pickling treatment, the sponge gold can be cast into gold ingots with a gold grade of over 99.9%.
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Precious Metal Mixed SolutionSeparating Rhodium (Rh) and Ruthenium (Ru) from Precious Metal Mixed SolutionThe method for separating rhodium and ruthenium from a precious metal mixed solution includes the following steps:
Add deionized water to the precious metal mixed solution to adjust the rhodium concentration in the system, then add dilute hydrochloric acid to adjust the pH of the mixed solution to 2.1~2.3.
Slowly heat the precious metal mixed solution to 125℃~130℃, then slowly add triethylenetetramine (TETA) solution under continuous stirring. Rhodium ions in the mixed solution react with triethylenetetramine to form rhodium salt precipitates. After cooling, filter the mixture to obtain filter residue and filtrate, with the filtrate reserved for subsequent use. Wash the filter residue until the washing effluent is colorless, then place the filter residue in a quartz boat and feed it into a muffle furnace.
This method can effectively solve the drawbacks of existing rhodium and ruthenium recovery processes: conventional recovery mostly adopts the melting method, which has complex procedures, can only recover target metals from solid waste, and cannot be applied to precious metal mixed solutions.
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High-Efficiency Recovery of Platinum Group Precious MetalsHigh-Efficiency Recovery of Platinum Group Precious Metals
Method for High-Efficiency Recovery of Platinum Group Precious Metals from Platinum-Containing Organic Alcohol Waste Liquor
To solve the defects of existing methods such as complex process, low platinum recovery rate, high energy consumption, environmental unfriendliness, poor product purity and potential safety hazards:
The method comprises the following steps: filter the platinum-containing organic alcohol waste liquor, remove filter residues to obtain a clear filtrate, and adjust the pH of the filtrate to 1.0-2.0 with acid or alkali liquor;
Under continuous stirring, add excess weak reducing agent into the pretreated platinum-containing organic alcohol waste liquor for reaction. The weak reducing agent refers to a reducing reagent whose reduction potential under the acidic condition of pH=1.0-2.0 can reduce metals with metal activity equal to or lower than platinum, but is not sufficient to reduce metals with potential higher than H⁺ potential;
Filter the reacted solution to obtain filter residues and tail liquor. The filter residues are washed and roasted to obtain powdery platinum group precious metals. The recovery process has the advantages of simple operation, short flow, high recovery rate, high product purity and low cost, and is of great industrial application value.
