Multiple roasting gold extracting method for unmanageable arsenic-containing gold concentrate
A technology of multiple roasting and gold concentrate, which is applied in the improvement of process efficiency, photography technology, instruments, etc., can solve the problem of low recovery of gold and silver from arsenic gold concentrate, and achieve the improvement of resource utilization. The method is simple and easy to implement. Effect
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[0015] Example 1
[0016] 1. Ingredients: The tailings after secondary roasting and cyanidation for gold extraction, in which the gold grade is 7.50g / t, and the high-grade sulfide ore containing gold, silver and copper in a ratio of 1:2, are mixed in a slurry tank. , and add water to adjust the slurry concentration to 70%, at room temperature and pressure, and continuously stir to obtain a slurry suitable for roasting conditions with a sulfur content of 25.10%;
[0017] 2. Roasting: The prepared pulp is sent to the boiling furnace for sulfate roasting, and the temperature is controlled at 630°C; the generated sulfur dioxide flue gas enters the acid production system to produce sulfuric acid; the generated slag enters the acid leaching process;
[0018] 3. Acid leaching: in the acid leaching tank, acid leaching the roasting slag with sulfuric acid, control pH=1, the temperature is 85°C, and the liquid-solid ratio is 1.5:1;
[0019] 4. The produced copper-containing acid leachi...
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[0021] Example 2
[0022] 1. Ingredients: Mix the tailings after secondary roasting and cyanidation for gold extraction, in which the gold grade is 8.10g / t, and the ratio of 1:2 with the high-grade sulfide ore containing gold, silver, and copper is carried out in the mixing tank. , and add water to adjust the slurry concentration to 68%, at room temperature and pressure, and continuously stir to obtain a slurry suitable for roasting conditions with a sulfur content of 25.90%;
[0023] 2. Roasting: The prepared pulp is sent to the boiling furnace for sulphation roasting, and the temperature is controlled at 580°C; the generated sulfur dioxide flue gas enters the acid production system to produce sulfuric acid; the generated slag enters the acid leaching process;
[0024] 3. Acid leaching: in the acid leaching tank, acid leaching the roasting slag with sulfuric acid, control pH=1.5, the temperature is 90°C, and the liquid-solid ratio is 1.4:1;
[0025] 4. The produced copper-co...
Example Embodiment
[0027] Example 3
[0028] 1. Ingredients: The tailings after secondary roasting and cyanidation for gold extraction, in which the gold grade is 9.28g / t, and the high-grade sulfide ore containing gold, silver and copper in a ratio of 1:2, are mixed in a slurry tank. , and add water to adjust the slurry concentration to 69%, at room temperature and pressure, and continuously stir to obtain a slurry suitable for roasting conditions with a sulfur content of 22.90%;
[0029] 2. Roasting: The prepared pulp is sent to the boiling furnace for sulphation roasting, and the temperature is controlled at 680°C; the generated sulfur dioxide flue gas enters the acid production system to produce sulfuric acid; the generated slag enters the acid leaching process;
[0030] 3. Acid leaching: in the acid leaching tank, acid leaching the roasting slag with sulfuric acid, control pH=2.0, the temperature is 70°C, and the liquid-solid ratio is 1.6:1;
[0031] 4. The produced copper-containing acid l...
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