Abstract
Ore liberation is one of the most important parameter in mineral processing, especially in flotation. To separate the valuable components from gangue minerals, it is necessary to liberate one from others. It is achieve primarily through crushing and grinding. These stages are one of the most expensive of mineral production. It is important to determine the adequate mineral liberation which would result in huge savings in the overall cost of flotation plant. The aim of the paper was the analysis of the influence of milling time on the laboratory flotation of the copper ore from stratiform Polish deposit. Three different milling time of copper ore in laboratory ball mill was applied. The flotation results were presented as the recovery-recovery and grade-recovery upgrading curves. The liberation of sulphides and the particle size of sulphides in flotation product were analysed and compared.
Highlights
The success of the separation process is related to the size and liberation of feed particles [1,2,3]
This paper focuses on the influence of liberation of sulphide minerals in flotation of Polish copper ore from the Lubin-Glogow Basin (LGOM, SW Poland), the biggest copper deposit in Europe [13]
The comparison of the grain composition and liberation of sulphides in the flotation feed is presented in Fig. 5 and 6
Summary
The success of the separation process is related to the size and liberation of feed particles [1,2,3]. The definition of liberation varies from author to author [4]. Locked particles can be binary, ternary, quaternary etc., as they consist of two, three, four or more minerals [5]. Liberation of particles is achieved mainly through crushing and grinding of the ore. These stages usually consume 30–50% of overall energy costs of mining operation, but it can rise even to 70% for hard and/or finely intergrown ores. Achieving ‘sufficient’ liberation can bring huge savings in costs of mineral production [68]
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