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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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Recovering Gold and Silver from Refractory Gold OresRecovering Gold and Silver from Refractory Gold Oresa method for recovering gold and silver from refractory gold ores, which falls into the field of metallurgy. It consists of two parts:
First, destroying the inclusions encapsulating gold and silver through hot pressure pre-oxidation, oxidizing organic carbon in the ore, and recovering sulfur contained in the ore;
Second, recovering gold and silver from the pre-leach residue via cyanidation or other cyanide-free leaching processes.
Recovery gold and silver from refractory gold ores, the total recovery rate of gold and silver exceeds 90%, which is 40 percentage points higher than that of the conventional cyanidation process, and the sulfur recovery rate is above 50% at the same time. The production cost of this process is approximately RMB 400 per ton of ore. Compared with bio-oxidation, two-stage roasting and conventional hot pressure oxidation processes, can reduce investment and production cost, improve recovery efficiency, realize comprehensive recovery of multiple elements, and lower environmental pollution, with remarkable economic and social benefits.
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Waste Blue Adhesive Film SheetsWaste Blue Adhesive Film Sheets for Semiconductor ApplicationsAt present, pretreatment methods for precious metal-bearing waste blue adhesive film sheets include the roasting process and wet stripping processes (using inorganic solvents and organic solvents respectively).
The roasting process has the advantage of a short treatment flow, as alloy feedstocks can be obtained directly after roasting. However, it has drawbacks of high investment cost: it requires the procurement of incinerators and flue gas treatment devices (as a large amount of harmful flue gas generated during roasting needs to be treated), leading to high environmental protection costs.
For the organic solvent-based wet stripping process, its merit is that it is easy to realize large-scale and automated production. Nevertheless, this method has defects such as long process flow, high requirements for production equipment, large reagent consumption, great harm to human health caused by the high volatility of reagents, and difficult waste liquid disposal.
As for the inorganic solvent-based wet stripping process, it also has problems including long treatment flow, low mechanization degree during the treatment process and relatively low efficiency.
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Precious Metal Recovery Electric Arc FurnacePrecious Metal Recovery Electric Arc FurnaceThe precious metal recovery electric arc furnace is a metal smelting furnace adopting DC (direct current) electric arc furnace technology, designed for the recovery and enrichment of precious metals from deactivated precious metal catalysts with silica-alumina carriers, precious metal-bearing tailings and smelting slag.
An openable curved exhaust hood is installed at the top of the furnace body. The hood consists of two symmetric left and right halves, which can be rotated towards each other to splice and form a hermetic seal. A screw conveyor is arranged above the furnace body, with its discharge port directly aligned with the furnace top. An exhaust duct is set above the opening-closing joint of the two halves of the curved exhaust hood, and the duct is connected in sequence to a dry quench tower, a bag dust collector, an induced draft fan and an exhaust stack.
Through material pretreatment and batching, the process improves the metal capture rate and the quality of the silicate glass phase in the furnace slag, making the slag meet the raw material standards for Portland cement and slag wool. It realizes the comprehensive recovery of both precious metals and catalyst carriers, and achieves the compliant disposal of hazardous solid waste.
