Method for recycling gold and copper from copper-containing oxidization gold ores
A technology for copper oxidation and gold recovery, which is applied in the improvement of process efficiency, photographic technology, instruments, etc., can solve the problems of affecting the effect of activated carbon adsorption of gold, occupying the active points of activated carbon adsorption, and the effect of copper removal is not very ideal, and achieves leaching. The time is shortened, the leaching effect is obvious, and the effect of reducing infrastructure investment
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[0020] Example 1
[0021] A copper-bearing oxidized gold ore ore has a gold content of 5.7g / t and a copper content of 0.6%. (1) The raw ore is first coarsely crushed, and the raw ore is crushed 4 ) 2 SO 4 , 5.4 grams of CaO, 0.6 grams of NaCN; (3) The slurry after adding the leaching agent is adjusted by a mechanical stirring device, so that the slurry is in a suspended state in the electrolytic cell, and the electrodeposition condition is to use a ruthenium-iridium coated titanium plate as the anode , the cathode adopts graphite cathode, the electrode spacing is 5mm, and the current density is 150A / m 2 , the temperature of the electrowinning solution is normal temperature; (4) Direct current is applied, and after 12 hours of slurry electrolysis, the leaching slag is filtered and dried, the content of slag gold is analyzed and the leaching rate of slag gold is calculated. to 90%. (5) The filtrate after electrowinning is supplemented with part of the leaching reagent and wa...
Example Embodiment
[0023] Example 2
[0024] Except that steps (1), (3), (4), (5) are the same as in Example 1, the data of its embodiment are as follows:
[0025] Take 300 grams of finely ground ore sample, add 750 mL of water to make a slurry, add 5.4 grams of NH to the slurry 4 HCO 3 , 5.4 g Ca(OH) 2 , 0.3 g of NaCN; the leaching residue is filtered and dried, the slag gold content is analyzed and the slag gold leaching rate is calculated, and the slag gold leaching rate reaches 90%. After the filtrate after electrowinning is supplemented with some chemicals to the initial concentration, it is mixed with the raw ore sample to continue the electrowinning.
Example Embodiment
[0026] Example 3
[0027] Except that step (1) is the same as Example 1, the data of its embodiment are as follows:
[0028] Take 300 grams of finely ground ore sample, add 750 mL of water to make a slurry, and add 5.4 grams of (NH4) to the slurry. 4 ) 2 SO 4 , 5.4 grams of CaO, 0.6 grams of NaCN; the pulp after adding the leaching agent is adjusted by a mechanical stirring device, so that the pulp is in a suspended state in the electrolytic cell. Cathode, electrode spacing is 20mm, current density is 50A / m 2 , the temperature of the electrowinning solution is normal temperature; after 24 hours of slurry electrolysis, the leaching residue is filtered and dried, and the gold content is analyzed; the gold leaching rate reaches 91%.
[0029] Comparison experiment of leaching by conventional method: take 300 grams of finely ground ore sample, add 750 mL of water to make ore pulp, and add 5.4 grams of (NH4) to the ore pulp 4 ) 2 SO 4 , 5.4 grams of CaO, 0.6 grams of NaCN, st...
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