Gold deposits are widely distributed across Africa, with countries such as Ghana, Tanzania, Mali, Burkina Faso, Zimbabwe, and Sudan all having a large number of small and medium-sized gold mines.
Project Background
Gold mines are widely distributed across Africa, with countries such as Ghana, Tanzania, Mali, Burkina Faso, Zimbabwe, and Sudan all having a large number of small and medium-sized gold mines.
Weak infrastructure: The power supply is unstable, road conditions in mining areas are poor, and the construction of large-scale stationary crushing lines requires a long lead time and significant investment.
Complex ore characteristics: There is a high proportion of surface-oxidized ore with high clay content; in some mining areas, the rainy season is prolonged, resulting in high moisture content in the ore.
High transportation costs: Mining sites are scattered, and the cost of transporting ore from the quarry to the processing plant accounts for a significant portion of operating costs.
Shortage of skilled workers: It is difficult to ensure the operation and maintenance of complex equipment, necessitating robust and durable machinery.
Double roller crusher for gold ore
In a mining environment with limited access to power, roads, funding, and technology, the customer chose Huashengming’s double-roll crusher to obtain qualified feed material with uniform particle size and minimal over-crushing at the lowest possible cost and with the simplest operation and maintenance, thereby ensuring gold recovery rates and production continuity.
Advantages of Roll Crushers in Gold Mining
Minimize over-grinding to improve recovery rates
Traditional impact crushers tend to break gold particles into very fine particles, making flotation and cyanide recovery difficult. The compression crushing action of double-roll crushers produces fewer cracks, ensuring thorough liberation of gold particles while maintaining a good particle size distribution, which directly improves recovery rates in subsequent gravity separation and flotation processes.
Uniform and controllable particle size
The roller gap is hydraulically adjustable, ensuring that the output particle size remains consistently within the target range and preventing a mixture of coarse and fine particles.
Low energy consumption and low wear and tear
Compared to impact crushers and ball mills, double-roll crushers consume approximately 30%–50% less energy. Their roll surfaces are made of wear-resistant materials with a long service life, making them particularly suitable for use in the fine crushing stage of gold ore processing plants to partially replace ball mill feed, thereby reducing overall crushing and grinding costs.
Mobile Deployment On-Site Crushing
Tire- or track-mounted vehicles can drive directly into mining areas or to the edge of heap leaching pads; gold ore does not need to be transported long distances and, after crushing, is loaded directly onto the heap or fed into the mill, saving transportation costs.
mobile roll crusher for gold mining
Customer Feedback
A gold mine deployed a mobile double-roll crusher next to its heap leaching pad. After being coarsely crushed by a jaw crusher, the raw ore is fed directly into the double-roll crusher for fine crushing to -15 mm, and the finished product is evenly spread onto the heap. Since its implementation, the permeability of the heap leaching pad has improved significantly, the leaching cycle has been shortened, and the gold leaching rate has increased by approximately 3 percent, while also reducing the costs associated with second-time ore handling.
Conclusion
The price of a complete mobile double-roll crusher system is lower than that of a cone crusher or impact crusher production line with equivalent capacity. It also eliminates the need for infrastructure construction and reduces the number of transport vehicles required, allowing for a quick return on investment once operations begin. This meets the needs of small and medium-sized mine owners in Africa, who have limited capital and seek rapid returns.
