In the gold mining industry, the quality of the beneficiation process directly affects resource utilization rate, production cost and environmental impact. Jiangxi Mingxin Metallurgical Equipment Co., Ltd. has made a name for itself in the industry with its advanced and unique gold ore beneficiation process.

The multi-stage crushing process adopted by Jiangxi Mingxin, from coarse crushing to fine crushing, all links 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 pieces of raw ore to ≤150mm, laying a solid foundation for the subsequent fine crushing. Entering the fine crushing stage, the equipment that applies the principle of lamination crushing can further reduce the particle size of the ore to 10-30mm, with uniform finished product particle size. Compared with traditional equipment, energy consumption is reduced by 20%. This refined crushing process has significantly enhanced the efficiency of subsequent grinding operations, setting a good precedent for the efficient operation of the entire mineral processing procedure.

In the grinding process, Mingxin Company adopts a closed-circuit grinding system composed of a ball mill and a screw classifier. The ball mill fully grinds the ore to below 0.074mm, while the screw classifier precisely separates coarse and fine particles. Coarse sand is promptly re-ground, and fine slurry smoothly enters the sorting stage. The closed-loop circulation mode effectively reduces overgrinding. Compared with open-loop grinding, energy consumption is saved by 15% to 30%, which not only lowers costs but also ensures the quality of ground products, providing favorable conditions for subsequent gold separation.

In terms of the sorting process, Mingxin Company's procedures are full of highlights. First, a centrifuge is used for rough selection. With the help of a powerful centrifugal force field, heavy gold-bearing minerals can be rapidly enriched. The recovery rate of rough concentrate can reach over 85%, and the processing capacity per hour can be as high as 10 to 50 tons, which is a very considerable processing capacity. For the coarse concentrate produced by the centrifuge, through the fine selection by the shaker, fine gold particles can be precisely separated, raising the gold grade to over 90%, and the tailings grade can be controlled at ≤0.2g/t. Meanwhile, for the tailings from the centrifuge, a spiral chute is adopted for sweeping and selection to further recover the residual fine-grained gold, increasing the total recovery rate by 5% to 8%. Moreover, the spiral chute is designed without power, resulting in extremely low operating costs.

In addition to the scientific nature of its process design, Jiangxi Mingxin also demonstrates unique ingenuity in the selection of equipment. For instance, the crusher is equipped with heavy-duty movable jaw plates made of high manganese steel, which extends its service life by three times. It is equipped with a hydraulic adjustment system, which can quickly adjust the output particle size and adapt to different types of minerals. The intelligent control system monitors the spindle speed and pressure in real time to prevent material blockage. The ball mill adopts variable frequency drive, which can automatically adjust the rotational speed according to the hardness of the ore, saving energy by 10% to 15%. The service life of the wear-resistant spiral blades inside exceeds 12 months, and the maintenance cost is reduced by 40%. Some centrifuges adopt a dual centrifugal drum design, integrating rough and fine selection. The gold recovery rate has been increased to 92%, and they also have an automatic cleaning function, reducing the frequency of manual cleaning and enhancing the continuity of operation.

From an environmental protection perspective, the mineral processing procedure of Mingxin Company also performs exceptionally well. The re-selection process itself is free from chemical contamination and meets the current strict environmental protection requirements. Meanwhile, the company attaches great importance to the recycling of water resources. The wastewater generated during the mineral processing, after being treated in sedimentation tanks, can be recycled for processes such as ore washing and jigging, significantly reducing water consumption and minimizing the negative impact on the environment.

The gold ore beneficiation process of Jiangxi Mingxin Metallurgical Equipment Co., Ltd. has achieved the goal of a gold recovery rate of over 90% and a 25% reduction in comprehensive costs, thanks to its efficient crushing and grinding techniques, precise separation technology, advanced equipment configuration and outstanding environmental protection measures. Whether it is small and medium-sized mines or large-scale concentrators, this process can be quickly implemented and applied, helping to maximize the value of minerals and becoming an outstanding model in the industry.