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

Inactive Publication Date: 2007-11-28
SHANDONG GUODA GOLD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a simple, economical and practical method for extracting gold by multiple roasting of refractory arsenic-containing gold concentrate, which can recover gold and silver and other products to the maxi

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[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...

Example Embodiment

[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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Abstract

A kind of method to extract gold by time and time burning with aurin mine containing arsenic difficult to deal with, and it belongs to the mineral pretreatment technology field of gold meltallurgy industry. The following is it' s character: 1.blending: In the paste ark, the high-grade sulfide ore will be added into the ore tailing, which has been extracted gold by secondary burning cyanation, the content of sulfur will increased to more than 22%, the pulp density will be adjusted to 68%-70% by adding water, the temperature will be controlled at 580-680deg.C, the sulfur dioxide smoke gas will enter the acid-making system and produce vitriol, and the burning residue will be delivered into the acid dipping procedure. 3.acid dipping: In the acid dipping ark, the burning residue will be acid dipped by vitriol, and the pH of it will be controlled at 1-2, and the temperature of it is 70-90deg.C, and the liquid to solid is (1.4-1.6): 1. 4.The acid-immersing liquid containing copper will be delivered to electro depositing procedure to reclaim the cathode copper. And the acid-immersing residue will be delivered to cyanating gold extracting procedure to reclaim bullion. The problem that the reclaim of bullion from aurin mine containing arsenic difficult to deal with is low is resolved by this patent, and it fully take advantage of the bullion mineral resource, it does not need new equipments, it is easy to be carried on, and is economic and practical.

Description

1. Technical field [0001] The invention relates to a method for extracting gold by multiple roasting of refractory arsenic-containing gold concentrate, which belongs to the technical field of mineral pretreatment technology in the gold metallurgy industry. 2. Background technology [0002] In gold smelting enterprises, for refractory gold concentrates containing arsenic, carbon, sulfur, etc., the secondary roasting pretreatment is generally used, and the slag is then cyanided. The recovery rate of gold and silver can reach 90% and 75%. As mentioned above, gold extraction tailings generally contain less than 2.0g / t of gold and less than 30g / t of silver. These tailings generally do not continue to recycle valuable elements such as gold and silver, but are directly used as cement additives and iron red raw materials. , Ceramic raw materials, etc. However, there are some refractory gold concentrates containing arsenic, carbon, sulfur, etc. Even if the secondary roasting pretrea...

Claims

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Application Information

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IPC IPC(8): C22B11/00C22B1/06C22B3/08C22B3/26C22B11/08C25C1/12
CPCY02P10/20
Inventor 徐永祥王建政曹永超朱德兵
Owner SHANDONG GUODA GOLD
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