Pretreatment process for gold extraction of gold ore
A pretreatment and gold mine technology, which is applied in the field of pretreatment process for gold extraction from gold mines, can solve the problems of potential safety hazards, impact on gold recovery, high operating costs, etc., to reduce production costs and environmental pressure, reduce sulfur dioxide production, The effect of convenient storage, transportation and sales
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Embodiment 1
[0050] In this example, a refractory gold ore in Guangxi was selected, and the gold was encapsulated in sulfide in a fine-grained disseminated state. The specific operation steps and process parameters used in this example are as follows: take 100 grams of this refractory gold ore for crushing, ball milling and powdering, the particle size is less than 0.074mm, accounting for 95%, put it into a corundum crucible and put it into a closed heating furnace, pass nitrogen gas Oxygen-free roasting was carried out, the roasting temperature was controlled at 900°C, and the roasting time was 0.5 hours. The flue gas produced by roasting is cooled to obtain a sulfur-containing product, and the roasting slag is mixed with sulfuric acid for slurrying, and the weight ratio of liquid to solid is controlled to be 8:1. Sodium lignosulfonate was used as the agent, and the slurry after sizing was placed in a reactor for leaching. The leaching temperature was controlled to be 165 °C, the total pr...
Embodiment 2
[0055] In this example, a refractory gold ore in Yunnan is selected. The gold is in the form of fine-grained dissemination and is wrapped in sulfide and contains carbon with gold robbing effect. %, carbon 3.2%, arsenic 4.1%, antimony 1.1%. The specific operation steps and process parameters used in this example are as follows: take 100 grams of this refractory gold ore for crushing, ball milling and powdering, the particle size is less than 0.074mm, accounting for 65%, and place it in a heating furnace and pass into argon for roasting, and the roasting temperature is controlled at 750℃, calcination time is 3 hours. The flue gas produced by roasting is cooled to obtain sulfur-containing products, and the roasting residue is mixed with acid to make pulp. Calcium acid, the slurry after sizing is placed in the reactor for leaching, the leaching temperature is controlled to be 145°C, the total pressure is 1.3MPa, the partial pressure of oxygen is 0.7MPa, and the concentration of s...
Embodiment 3
[0060] In this example, a refractory gold ore in Liaoning was selected, and the gold was encapsulated in sulfide in a fine-grained disseminated state. The specific operation steps and process parameters adopted in this example are as follows: take 100 grams of this refractory gold ore for crushing, ball milling and powdering, the particle size is less than 0.074mm, accounting for 50%, and place it in a heating furnace and pass into hydrogen for roasting, and the roasting temperature is controlled at 550 ℃ ℃, the calcination time is 4 hours. The flue gas produced by roasting is cooled to obtain hydrogen sulfide and other products, and the roasting residue is mixed with acid to make pulp, and the weight ratio of liquid to solid is controlled to be 0.5:1, the concentration of sulfuric acid is 50g / L, and 0.1% of the weight of roasting residue is added. The desulfurizer lignin Potassium sulfonate, the slurry after sizing is placed in the reactor for leaching, the leaching temperatu...
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