Gold ore beneficiation equipment, also known as placer gold ore beneficiation equipment, is directly referred to as gold ore beneficiation equipment in some places. The beneficiation production line of Jinqiang Gold Mine has advanced technology and sophisticated equipment.
At present, China has discovered 98 types of gold deposits and gold bearing minerals, of which only 47 are common, and only 10 or more minerals are directly utilized in industry. There are nearly 38 gold bearing substances in China, and the gold content in gold mines is generally relatively low.
The gravity separation process and flotation process of gold ore beneficiation production lines are commonly used beneficiation methods in gold mines. Most gold mines in China use the above methods to extract gold, and there have been significant improvements in the production line technology and equipment of gold ore beneficiation.
The current mainstream gold ore beneficiation production lines generally use placer gold ore beneficiation equipment such as crushers for crushing, followed by ball mills for crushing, gravity and flotation processes to extract the concentrate and tailings, followed by chemical methods and smelting. The product will become finished gold.
The gold ore beneficiation production line can be understood as:
After the initial crushing of the raw ore, it enters the double vibration screening process. The upper layer of the product is further crushed, and the second stage of crushing is carried out together with the middle layer of the product. The second stage of crushing products return to the previous stage of crushing products for screening.
The screened products are ground by the front stage ball mill and form a closed circuit grinding with the grading mechanism. The grading overflow is classified by the cyclone and then enters the second stage ball mill for further grinding, forming a closed circuit grinding with the cyclone.
The rotary overflow is first subject to preferential flotation. Its foam products are subject to secondary cleaning, and the tertiary cleaning is compared to become concentrate products. The tailings after preferential flotation go through the selection process of primary roughing, primary cleaning, secondary cleaning, tertiary cleaning, primary cleaning, etc. The tailings after primary cleaning and the foam products after primary cleaning enter the rotary products for re classification and re selection. The secondary cleaning and primary cleaning constitute closed circuit selection, Three rounds of selection and two rounds of selection constitute a closed loop selection.
Crushing and grinding processes of gold placer beneficiation equipment:
The crushing process of gold placer beneficiation equipment often uses jaw crushers for coarse crushing, standard cone crushers for crushing, and short head cone crushers and roller crushers for fine crushing. Small and medium-sized gold concentrators often use a two-stage closed circuit crushing process, while large gold concentrators use a three-stage closed circuit crushing process. In order to improve production and the utilization coefficient of placer gold ore beneficiation equipment, beneficiation plants generally follow the principle of more crushing and less grinding, reducing the grinding particle size.
Gravity separation process of gold placer beneficiation equipment:
The gravity beneficiation method of the gold ore beneficiation production line is based on the mineral Density contrast. The main beneficiation equipment for placer gold mines includes chutes, shakers, jigs, and short cone cyclones.
Flotation process of gold placer beneficiation equipment:
80% of the country's gold concentrators use the gold production line flotation method for gold separation, and the produced concentrate is mostly sent to non-ferrous smelters for treatment. With the continuous development of cyanide based gold extraction, in order to improve economic benefits and reduce concentrate transportation losses, enterprises often use on-site treatment. The flotation process of gold production lines has developed rapidly and occupies an important position in gold beneficiation production.
The chemical separation process of gold placer beneficiation equipment.
Currently, there are two main methods for gold ore beneficiation production line: mixed mercury method and cyanide method. The mixed mercury method is an ancient gold extraction process that is both simple and economical, suitable for the recovery and utilization of coarse single gold particles. However, the mechanized separation method of gold ore beneficiation production line has caused great environmental pollution, gradually being replaced by gravity separation, flotation, and cyanide methods.
The cyanide extraction process includes cyanide extraction, washing and filtration of leaching pulp, extraction of gold from cyanide solution or cyanide pulp, and smelting of finished products.
Smelting process of gold placer beneficiation equipment
Smelting is the subsequent process of extracting gold, divided into rough refining and refining. The development of gold smelting in China is rapid, and traditional crucible smelting is often used to produce high-quality gold, or to send it to non-ferrous metal smelters for processing and refining of finished gold.
The heap leaching process of gold placer beneficiation equipment.
In China's gold mine resources, low-grade oxidized ore accounts for a certain proportion. The conventional cyanide method for extracting metals from such ore is not cost-effective, but the use of stacking production technology has economic benefits.
Gold ore beneficiation production line technology
The gold ore beneficiation production line technology is used to obtain high recovery indicators of gold ore through gold ore processing. The equipment and technology used in the gold ore beneficiation production line must conform to the properties of the gold ore, fully utilize resources, and reduce the loss during the gold ore enrichment process.
The beneficiation equipment for gold placers mainly includes crushing equipment (jaw crusher for short, cone crusher for short), grinding equipment (high-efficiency energy-saving cone ball mill), classifier, mixing bucket, chute, flotation machine, etc.
Technical methods for beneficiation equipment of placer gold mines (gravity and flotation)
Firstly, the gravity separation of gold placer beneficiation equipment.
Gravity separation is a commonly used beneficiation process in gold ore beneficiation production lines, and the combination of gravity separation flotation magnetic separation process is also a favored beneficiation process by major gold ore beneficiation equipment manufacturers.
Sand gold beneficiation equipment has the advantages of simple operation, low investment, low power consumption, and early recovery of gold ore. However, the disadvantage is that the recovery effect of fine gold is poor, so the gold ore production line process is rarely used solely for gold ore beneficiation. Flotation cyanide process is often used to treat fine gold ore, which can directly produce high-quality gold, save gold concentrate losses and freight costs, and improve the economic benefits of material selection manufacturers.
Gravity beneficiation is a method of separating ores according to Density contrast of minerals, which plays an important role in modern beneficiation. The main beneficiation equipment for placer gold mines includes chutes, shakers, jigs, and short cone cyclones.
Secondly, the flotation of gold placer beneficiation equipment.
80% of domestic gold concentrators use flotation method for gold separation, and the produced concentrate is mostly sent to non-ferrous smelters for treatment. With the continuous development of cyanide extraction of gold and the efforts of enterprises to improve economic benefits and reduce concentrate transportation losses, the product structure has undergone significant changes. Many of them use on-site treatment (which is also due to conflicts and pricing issues between beneficiation and metallurgy, forcing mines to handle on site), resulting in significant development of the flotation process in gold mining production lines and occupying a significant position in gold beneficiation production. 98 types of gold and gold-bearing minerals have been discovered, with only 47 commonly found and only over 10 minerals directly utilized in industry. There are nearly 38 types of gold bearing substances in China, and the gold content is generally low.