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Metal Mine ›› 2020, Vol. 49 ›› Issue (07): 89-93.

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Ultra-fine Regrinding Process Application in a Copper-lead-zinc Polymetallic Mine in Russia

Kizil-Kashiturk copper-lead-zinc polymetallic sulphide ore in Russia disseminated in micro-fine size and the process with the original single ball mill for regrinding the copper-lead bulk roughing concentrate is difficult to meet the requirement of high mineral liberation. Therefore， the regrinding system transform and production practice was carried out based on mineralogy properties analysis and laboratory scale. By series connection of ball mill and ultra-fine mill， that is adding a new ultra-fine mill to regrind the overflow of the hydrocyclone matched with the original ball mill， final regrinding products of P80 size less than 10 μm was obtained， indicated that the liberation of metal minerals in ores is greatly improved， which makes it conducive to sorting. After stable running of the new regrinding process， it has obvious effect on product quality stabilizing. Compared with the previous system， the transfomation brought out the increase of recovery rate with Pb 16.84%， Zn 4.96% and Cu 2.70%. According to the annual processing of one million tons of ore， the increase of metal amounts with Zn 4 960 t/a， Pb 2 910 t/a，and Cu 208 t/a was realized， which could create a newly added profit of 120 million yuan for enterprises based on the calculation product price.   

  1. 1. Zijin Mining Group Co.， Ltd.， Shanghang 364200， China； 2. School of Civil and Resources Engineering， University of Science and Technology Beijing， Beijing 100083， China
  • Online:2020-07-15 Published:2020-08-21

Abstract: Kizil-Kashiturk copper-lead-zinc polymetallic sulphide ore in Russia disseminated in micro-fine size and the process with the original single ball mill for regrinding the copper-lead bulk roughing concentrate is difficult to meet the requirement of high mineral liberation. Therefore， the regrinding system transform and production practice was carried out based on mineralogy properties analysis and laboratory scale. By series connection of ball mill and ultra-fine mill， that is adding a new ultra-fine mill to regrind the overflow of the hydrocyclone matched with the original ball mill， final regrinding products of P80 size less than 10 μm was obtained， indicated that the liberation of metal minerals in ores is greatly improved， which makes it conducive to sorting. After stable running of the new regrinding process， it has obvious effect on product quality stabilizing. Compared with the previous system， the transfomation brought out the increase of recovery rate with Pb 16.84%， Zn 4.96% and Cu 2.70%. According to the annual processing of one million tons of ore， the increase of metal amounts with Zn 4 960 t/a， Pb 2 910 t/a，and Cu 208 t/a was realized， which could create a newly added profit of 120 million yuan for enterprises based on the calculation product price.

Key words: Copper-lead-zinc polymetallic sulphide ore, Copper and lead bulk roughing concentrate, Ultra-fine mill, Regrinding process transformation