In the gold mining industry, the quality of the ore dressing process directly affects resource utilization, production costs, and environmental impact. Jiangxi Mingxin Metallurgical Equipment Co., Ltd. has stood out in the industry with its advanced and uniquely advantageous gold ore dressing process.
Jiangxi Mingxin Metallurgical Equipment Co., Ltd. adopts a multi-stage crushing process, where all links from coarse crushing to fine crushing are closely coordinated. In the coarse crushing stage, a jaw crusher with a high crushing ratio and low failure rate is selected, which can easily crush large raw ores to ≤ 150mm, laying a solid foundation for subsequent fine crushing. In the fine crushing stage, equipment using the principle of laminated crushing can further reduce the ore particle size to 10 - 30mm, with uniform finished product particle size, and energy consumption is reduced by 20% compared with traditional equipment. This refined crushing process greatly improves the efficiency of subsequent grinding operations, making a good start for the efficient operation of the entire ore dressing process.
In the grinding stage, Jiangxi Mingxin Metallurgical Equipment Co., Ltd. adopts a closed-circuit grinding system composed of a ball mill and a spiral classifier. The ball mill fully grinds the ore to below 0.074mm, while the spiral classifier accurately separates coarse and fine particles. The coarse sand is returned for regrinding in a timely manner, and the fine slurry smoothly enters the separation stage. The closed-circuit circulation mode effectively reduces over-grinding. Compared with open-circuit grinding, energy consumption is saved by 15% - 30%, which not only reduces costs but also ensures the quality of grinding products, providing good conditions for subsequent gold separation.
In terms of separation technology, the process of Jiangxi Mingxin Metallurgical Equipment Co., Ltd. has many highlights. First, a centrifuge is used for roughing. With the help of a strong centrifugal force field, gold-bearing heavy minerals are quickly enriched. The recovery rate of rough concentrate can reach more than 85%, and the hourly processing capacity is as high as 10 - 50 tons, with considerable processing capacity. For the rough concentrate produced by the centrifuge, a shaking table is used for cleaning, which can accurately separate fine gold particles, raising the gold grade to more than 90%, and the tailings grade can be controlled at ≤ 0.2g/t. At the same time, for the centrifuge tailings, a spiral chute is used for scavenging to further recover the residual fine gold, increasing the total recovery rate by 5% - 8%. Moreover, the spiral chute has a non-powered design, resulting in extremely low operating costs.
In addition to the scientific nature of the process design, Jiangxi Mingxin Metallurgical Equipment Co., Ltd. also shows ingenuity in equipment selection. For example, the crusher is equipped with a heavy-duty moving jaw plate made of high manganese steel, which extends the service life by 3 times; it has a hydraulic adjustment system, which can quickly adjust the discharge particle size to adapt to different ore types; the intelligent control system monitors the spindle speed and pressure in real-time to prevent blockage. The ball mill adopts frequency conversion drive, which can automatically adjust the speed according to the ore hardness, saving 10% - 15% of energy. The service life of its internal wear-resistant spiral blades exceeds 12 months, reducing maintenance costs by 40%. Some centrifuges adopt a double centrifugal drum design, integrating roughing and cleaning, increasing the gold recovery rate to 92%, and also have an automatic cleaning function, reducing the frequency of manual cleaning and enhancing operational continuity.
From an environmental protection perspective, Jiangxi Mingxin Metallurgical Equipment Co., Ltd.'s ore dressing process also performs well. The gravity separation process itself has no chemical pollution and meets the current strict environmental protection requirements. At the same time, the company pays attention to the recycling of water resources. The wastewater generated during the ore dressing process can be recycled for ore washing and jigging after being treated by a sedimentation tank, which greatly reduces water consumption and minimizes negative environmental impacts.
Jiangxi Mingxin Metallurgical Equipment Co., Ltd.'s gold ore dressing process, relying on efficient crushing and grinding processes, precise separation technology, advanced equipment configuration, and excellent environmental protection measures, has achieved the goals of a gold recovery rate of over 90% and a comprehensive cost reduction of 25%. Whether it is small and medium-sized mines or large-scale concentrators, this process can be quickly applied, helping to maximize the value of mineral resources, becoming an excellent model in the industry, and leading the development direction of gold ore dressing technology.
