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Add：Xifeng Fourth Road,Hi-Tech Industry Zone, Xi'an ,China
Postal Code:710000
Study on Process Mineralogy of Cyanide Tailings
Time: 2023-02-15 Source: Writer:
After the flotation gold concentrate is filtered through cyanide operation, cyanide tailings are obtained. Due to the different ore properties and the gold extraction process adopted, the properties and types of valuable metals and minerals in the tailings are also different. .
The main metal minerals in cyanidation tailings are sulfides: mainly pyrite, followed by chalcopyrite, a small amount of galena, sphalerite, etc.; gangue minerals are mainly quartz, a small amount of chlorite, mica, stone, kaolinite, etc.
The relative content of minerals is shown in Table 2
By conventional flotation, copper can be recovered from cyanide tailings since the main copper mineral is chalcopyrite. Since the content of sphalerite and galena is small, and the content of pyrite is the largest, it can be considered to recover copper and sulfur.
There are some main characteristics of cyanide tailings: the mineral particle size is very fine, and the mudification is serious; the mineral composition is relatively complex; it contains a certain amount of CN- and some residual chemicals. Due to the influence of the above factors, some minerals in the cyanide tailings The buoyancy of the carbon dioxide is greatly reduced, and it is difficult to recover the valuable elements in it.
The recovery of metals from cyanide tailings is different from the recovery of metals from raw ore, the main reasons are:
1) After regrinding and long-time aeration and stirring of gold concentrate, the mineral particle size is very fine (the content of -0.045mm particle size reaches 95%, or even finer, and the specific surface increases, showing a colloidal dispersion system, resulting in floating Selection is difficult to separate.
2) The cyanidation process strongly inhibits some metal minerals because they are over-ground and oxygenated, and it is difficult to activate them.
3) A large amount of argillaceous silicate minerals and cyanide in the pulp will deteriorate the flotation process and affect the grade and recovery rate of the concentrate.
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The main metal minerals in cyanidation tailings are sulfides: mainly pyrite, followed by chalcopyrite, a small amount of galena, sphalerite, etc.; gangue minerals are mainly quartz, a small amount of chlorite, mica, stone, kaolinite, etc.
The relative content of minerals is shown in Table 2
There are some main characteristics of cyanide tailings: the mineral particle size is very fine, and the mudification is serious; the mineral composition is relatively complex; it contains a certain amount of CN- and some residual chemicals. Due to the influence of the above factors, some minerals in the cyanide tailings The buoyancy of the carbon dioxide is greatly reduced, and it is difficult to recover the valuable elements in it.
The recovery of metals from cyanide tailings is different from the recovery of metals from raw ore, the main reasons are:
1) After regrinding and long-time aeration and stirring of gold concentrate, the mineral particle size is very fine (the content of -0.045mm particle size reaches 95%, or even finer, and the specific surface increases, showing a colloidal dispersion system, resulting in floating Selection is difficult to separate.
2) The cyanidation process strongly inhibits some metal minerals because they are over-ground and oxygenated, and it is difficult to activate them.
3) A large amount of argillaceous silicate minerals and cyanide in the pulp will deteriorate the flotation process and affect the grade and recovery rate of the concentrate.
Follow us for more information about gold heap leaching pls contact:
Whatsapp:+8613319277356
Email: chemicals@oremagnetic.com