In the field of gold mining, gold resources are usually found in the form of fine particles or inclusions within the ore. The traditional ball milling process has issues such as high energy consumption, uneven particle size control, and insufficient dissociation, leading to some gold minerals not being fully exposed, which affects the subsequent leaching or flotation recovery rates. Additionally, the fine gold particles remaining in the tailings are difficult to recover due to encapsulation or embedding, resulting in resource waste. As high-quality gold resources gradually decrease, improving the recovery efficiency of gold mines, especially the reuse of gold tailings, becomes crucial.

The multi-axis grinding equipment in vertical grinding machines provides an efficient solution for gold ore grinding and gold recovery from tailings, effectively enhancing the recovery efficiency of gold and maximizing resource utilization. The multi-axis grinder adopts a design concept that integrates gravity and fluidization technologies.Stirring shaftThe rotational kinetic energy of the stirring shaft creates a powerful vortex in the grinding chamber, mixing the medium and slurry. In this process, material particles collide and squeeze against each other under the shear force generated by the high-energy movement of the medium balls. This all-around, high-intensity grinding method can fully grind the minerals, allowing useful minerals to dissociate completely from the gangue, providing a suitable particle size and high dissociation degree for subsequent operations.PowderGreatly improves the recovery efficiency of gold mines. .

One.1. Gold ore grinding process

Crushing stage:The large blocks of gold ore extracted first enter the crushing stage. Typically, a jaw crusher is used for coarse crushing, breaking the large ore into smaller particles for subsequent processing. Then, equipment such as cone crushers is used for medium and fine crushing to further reduce the ore particle size. The crushed ore is screened through a double-layer vibrating screen to ensure that the particle size of the ore entering the next stage meets the requirements.

Grinding stage:The ore that has been crushed and screened enters the multi-axis grinder for grinding. During the grinding process, the stirring shaft's high-speed rotation drives the grinding medium and ore particles to form a vortex. The ore particles are gradually ground into fine particles under the impact and shear action of the medium balls. Compared to traditional grinding equipment, it can more efficiently grind the ore to the appropriate fineness, allowing the gold in the gold ore to be more fully exposed and improving the recovery rate of gold.Multi-axis grinderGrinding is carried out. During the grinding process,Multi-axis grinderThe stirringshafthigh-speed rotation drives the grinding media andOre particlesforms a vortex. The ore particles are gradually ground into fine particles under the impact and shear of the media balls. Compared to traditional grinding equipment,Multi-axis grinderIt can grind the ore to the appropriate fineness more efficiently, allowing the gold in the gold ore to be more fully exposed and improving the recovery rate of gold.

Classification stage:The ground ore is classified through classification equipment.PowderTo allowEnter the subsequentProcessingOperations.operation.

2. Gold tailings grinding and gold recovery processTailings pre-treatment:

Sampling and analysis of gold tailings are conducted to understand the composition, particle size distribution, and gold content of the tailings. Based on the analysis results, pre-treatment of the tailings is carried out, such as removing larger particle impurities through screening or using magnetic separation to remove magnetic minerals, creating favorable conditions for subsequent gold recovery operations.Regrinding stage:

The pre-treated tailings are sent to the multi-axis grinder for regrinding. Since the gold particles in the tailings have usually undergone one selection, they are finer, and some gold may be encapsulated in gangue minerals.With its powerful grinding capability and fine grinding effect, it can further dissociate the gold in the tailings, separating it from the gangue minerals. This effectively increases the recovery potential of gold in the tailings.Multi-axis grinderGold recovery stage:Multi-axis grinderThe regrinded tailings can be processed using suitable gold recovery methods based on their properties. Common gold recovery methods include gravity separation, flotation, and cyanidation.

Gold extraction stage:The tailings after regrinding can be processed using suitable gold extraction methods based on their properties. Common gold extraction methods include gravity separation, flotation, and cyanidation.

3.,Multi-axis grinderAdvantages of multi-axis grinding in gold ore grinding

High efficiency and energy saving:Multi-axis grinderWith its unique structure and working principle, it has a higher grinding efficiency compared to traditional horizontal ball mills and other grinding equipment, saving energy by more than 50%. Its low-density grinding medium not only reduces the consumption of the medium but also decreases the impact force during equipment operation, which can reduce carbon production in the grinding process by 30%-50%.can reduce the grinding process inProduct particle size is fine and uniform:.

It can grind the ore to the required particle size range of 300-2000 mesh,Multi-axis grinderand the product particle size distribution is uniform, which is beneficial for improving the dissociation and recovery rate of gold. At the same time, a uniform particle size distribution also provides good conditions for subsequent selection operations, reducing selection losses caused by particle size differences.the required particle size range of 300-2000 mesh.Low maintenance costs:

Whether during operation or downtime, all rolling bearings of the multi-axis grinder are subjected to symmetrical loads, reducing maintenance work and extending bearing life.Whether during operation or downtime,Multi-axis grinderSmall footprint:

With a modular design, compact structure, and small footprint, it can effectively save space in mineral processing plants and reduce infrastructure costs. This is a significant advantage for some mineral processing plants with limited space.Multi-axis grinderit adopts a modular design, is compact in structure, occupies a small area, and can effectively save space in the mineral processing plant, reducing infrastructure costs. This is a significant advantage for mineral processing plants with limited space.

Suitable for large-scale production:The multi-axis grinder can handle a large amount of mineral powder grinding.100 tons/hour, not only high efficiency but also low noise.

4. Application Cases

In the production of a certain iron ore mine in Yunnan, the recovery rate of iron concentrate reached72.4%, with a capacity of 100 tons/hour, while the electricity consumption was only 8.7/ton.