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1、Customer demand
The metal copper in copper ore is extracted by physical and chemical methods, and a theoretical and practical process is found for extracting copper from copper ore.
2. Basic customer data
Feed type | Copper production | Product shape | process mode | Solution copper content | Effluent copper content |
20% copper ore concentrates powder | 100 kg | Copper sulfate solution | Batch processing | 5-20% | 20g/L |
Copper sulfate solution | 100 kg | Electrolytic copper plate | Batch processing | 10-40g/L | 2g/L |
3.Process introduction
The experiment was mainly carried out in three steps:
In the first step, the copper metal in the copper ore is dissolved in the liquid, and the solid copper metal is converted into the free ion state;
The second step, the solution of dissolved copper is filtered to remove impurities;
The third step is to extract and purify the copper in the copper containing solution. The result is a high purity copper sheet.
4.Experimental Process:
1.Configure the concentration of about 10% to 15% concentration of dilute sulfuric acid
solution standby.
2.A certain amount of copper ore is weighed and crushed, and the crushed copper ore powder is placed in dilute sulfuric acid. After the copper ore is put into dilute sulfuric acid,
a violent reaction occurs in the solution, some gas emerges, and the copper ore slowly dissolves. The color of the potion turns cloudy.
3.Add an appropriate amount of oxidant to accelerate the dissolution of copper in the ore powder.
4.After about 1 hour,the solution appears stratified, green clear liquid appears on the upper layer,and very colored insoluble solid or sludge appears on the bottom.
5.The precipitation was filtered and separated, and the green liquid was filtered out.
6.The copper content of the green filtrate was analyzed, and the concentration of copper ion reached 40g/L. High copper content.
7.The electrolysis experiment was carried out on the green copper filter liquid, with the filter
liquid as the electrolyte, titanium plate as the anode and stainless steel plate as the cathode.
8.A certain intensity current is applied to the anode and cathode plate for electrolysis, and a
copper substance appears on the cathode plate and is attached to the cathode stainless steel plate. Continue electrolysis.
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silver-concentrate extraction processsilver-concentrate extraction processMethods of Silver-concentrate Extraction:
Silver refining is often conducted in cyano and thiosulfate solutions, while the use of HCl and HNO3 for silver leaching is limited. In HCl solution, silver primarily exists as AgCl, forming precipitates under high chloride concentrations. Thus, precipitation methods are commonly used to recover silver rather than leaching methods.
In HNO3 solution, silver mainly exists as AgNO3 with a higher solubility. However, nitric acid acts as a strong oxidizer, which can degrade or age the leach solutions. For effective silver leaching, the leaching agents must possess good anti-oxidation properties. As a result, there are very few effective leaching agents for silver.
In cyano compounds, silver reacts similarly to gold, forming complexes like K3[Ag(CN)2]. These can be leached using appropriate cyanide-based leach solutions.
In thiosulfate-containing solutions, silver forms Ag(S₂O₃), which can be leached by specific reagents. -
electrolytic silver refining processelectrolytic silver refining processAn electrolytic silver refining process in which crude silver is anodically dissolved and refined silver is cathodically deposited and at the same time accompanying metals are selectively extracted from the spent electrolyte and separately cathodically deposited after having been transferred into an aqueous phase and the regenerated electrolyte stripped of accompanying metals is recycled to the refining process and in which further the spent electrolyte is anodically enriched in silver and accompanying metals are cathodically deposited from the aqueous phase in a joint electrolysis step.
The invention resides in that the joint electrolysis step is carried out in a diaphragm cell in which a diffusion zone is provided between one each cathode and one each anode and separated from the anode zone by an anionic separating membrane and from the cathode zone by a cationic separating membrane and that the diaphragm cell is charged via the diffusion zone with accompanying metal extract.
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process for refining copper anode slimeprocess for refining copper anode slimeProcess For Refining Copper Anode Slime.:
1、Sulfuric roasting: recovery of selenium from the fumes;
2、Sulfuric immersion of copper: separation of copper solution and silver, followed by recovery of copper from the silver residue;
3、Alkaline leaching: removal of boric acid from alkaline solutions;
4、Chloride separation of gold: initial gold solution is reduced (the rough gold is refined into fine gold); after reduction, the solution is replaced with palladium and platinum;
5、sodium sulfite separation of silver: sodium sulfite separates silver from sodium sulfite solution; followed by ethanol reduction of rough silver powder;
6、Refining of rough silver: electrorefining of silver
