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The pre-concentrate effect of high-voltage electric pulse crushing on Yinshan copper ore was experimental investigated. High voltage electric pulse crushing and mechanical crushing were performed on 20–50 mm Yinshan copper ore. By the PEX150*250 jaw crusher, the different crushing morphology, particle size distribution, and grade distribution of ores under high voltage electric pulse crushing and mechanical crushing were compared. The results showed that useful minerals were often exposed at the fracture surface of the high-voltage electric pulse crushing product, while the fracture surface of the jaw crushing product was smooth and flat, without obvious fracture along the mineral interface. With the same energy consumption, there are more fine particle sizes in high-voltage electric pulse crushing products, the grade of fine-grained Cu and S in the high-voltage electric pulse crushing product is higher, indicating that high-voltage electric pulse has a stronger concentration effect on high-grade pyrite, and its selective breakdown provided the possibility of separating useful copper minerals from waste rock. Experimental research has found that under the same energy, high-voltage electric crushing exhibits significant selectivity and has a stronger pre-concentration effect. In order to compare the concentration effect differences under the same fine-grained content. Crushing is carried out in the PEX100 * 125 jaw crusher, and the fine particle content of mechanical crushing is increased by adjusting the width of the ore discharge port of the crusher. The results showed that adjusting the width of the discharge port of the jaw crusher significantly increased the content of medium and fine particles in the product. When the energy consumption increased to 60000J- The yield of 2mm particle size can reach up to 28.65%, but the distribution and yield of copper and sulfur are close to around 28%. This phenomenon can also be observed in other particle sizes, once again proving that mechanical crushing does not have selectivity and is difficult to achieve pre-concentration effect.

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The Pre-Concentration for Copper Ore by Using High Voltage Pulse

  • 会议论文

  • 发表日期：

    2026年

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  • Dong Luokang,
  • Fu Yingjie,
  • Qin Shenyi,
  • Yan Xin,
  • Zhong Cheng,
  • He Mengbing,
  • Liu Xiangyang

摘要

The pre-concentrate effect of high-voltage electric pulse crushing on Yinshan copper ore was experimental investigated. High voltage electric pulse crushing and mechanical crushing were performed on 20–50 mm Yinshan copper ore. By the PEX150*250 jaw crusher, the different crushing morphology, particle size distribution, and grade distribution of ores under high voltage electric pulse crushing and mechanical crushing were compared. The results showed that useful minerals were often exposed at the fracture surface of the high-voltage electric pulse crushing product, while the fracture surface of the jaw crushing product was smooth and flat, without obvious fracture along the mineral interface. With the same energy consumption, there are more fine particle sizes in high-voltage electric pulse crushing products, the grade of fine-grained Cu and S in the high-voltage electric pulse crushing product is higher, indicating that high-voltage electric pulse has a stronger concentration effect on high-grade pyrite, and its selective breakdown provided the possibility of separating useful copper minerals from waste rock. Experimental research has found that under the same energy, high-voltage electric crushing exhibits significant selectivity and has a stronger pre-concentration effect. In order to compare the concentration effect differences under the same fine-grained content. Crushing is carried out in the PEX100 * 125 jaw crusher, and the fine particle content of mechanical crushing is increased by adjusting the width of the ore discharge port of the crusher. The results showed that adjusting the width of the discharge port of the jaw crusher significantly increased the content of medium and fine particles in the product. When the energy consumption increased to 60000J- The yield of 2mm particle size can reach up to 28.65%, but the distribution and yield of copper and sulfur are close to around 28%. This phenomenon can also be observed in other particle sizes, once again proving that mechanical crushing does not have selectivity and is difficult to achieve pre-concentration effect.