Assessment of the Efficiency of Gold Ore Crushing by Repeated Dynamic Impacts: A Case Study of the Maltan Deposit Processing Plant
A. I. Matveev, E. S. L’vov
Chersky Institute of Mining of the North, Siberian Branch, Russian Academy of Sciences, Yakutsk, Russia
Keywords: Gold ores, ore preparation, crushing, repeated dynamic impacts, crusher DKD-300, gold recovery, circulating load, gravity separation, economic efficiency
Abstract
The issues of improving gold ore processing technology through the implementation of a crushing technique based on repeated dynamic impacts are examined. This study focuses on a seasonal modular processing plant, in which quartz-vein gold ore from the Maltan deposit is treated. A comparative analysis between the current ore preparation flowsheet with crushers SMD-116 and Barmac B-5000 and a proposed flowsheet with crusher DKD-300 is carried out. Material flows, circulating loads, processing performance, and economic efficiency of the new technology are calculated. The use of crusher DKD-300 reduced the total circulating load and the energy intensity of ore preparation. The crushing resulted in a complete liberation of gold particles coarser than 100 μm, which enabled pre-treatment of the crushed material. The flowsheet upgrade increased end-to-end gold recovery from 75.17% to 83.11%. The high technological and investment attractiveness of crushing by repeated dynamic impacts is confirmed at gold processing facilities.
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