ABSTRACT
With energy costs increasing and ore grades diminishing, the role of pre-concentration in hard rock mining operations has been gaining greater interest. To maximize energy conservation, the pre- concentration process should be conducted at as coarse a crush size as possible while minimizing losses of pay metals.
coarse as 300 mm and 500 pm with high separation efficiency, depending on liberation characteristics of the value minerals, The DMS process involves three steps: feed preparation, dense medium separation, and ferrous-based media recovery. This paper diseusses each of these processing steps, but focus will be given to the dense medium separation stage. Various types of
DMS equipment are reviewed. Pilot plant campaign case studies conducted at the SGS Lakefield site are presented, which have included a variety of mineral systems such as spodumene, sulphide-bearing gold ores, and complex sulphie ores. These case studies demonstrate that for amenable ores, mass rejection of 20-60% is possible while maintaining recoveries greater than 90% in most cases.
ABSTRACT With energy costs increasing and ore grades diminishing, the role of pre-concentration in hard rock mining operations has been gaining greater interest. To maximize energy conservation, the pre- concentration process should be conducted at as coarse a crush size as possible while minimizing losses of pay metals. coarse as 300 mm and 500 pm with high separation efficiency, depending on liberation characteristics of the value minerals, The DMS process involves three steps: feed preparation, dense medium separation, and ferrous-based media recovery. This paper diseusses each of these processing steps, but focus will be given to the dense medium separation stage. Various types of DMS equipment are reviewed. Pilot plant campaign case studies conducted at the SGS Lakefield site are presented, which have included a variety of mineral systems such as spodumene, sulphide-bearing gold ores, and complex sulphie ores. These case studies demonstrate that for amenable ores, mass rejection of 20-60% is possible while maintaining recoveries greater than 90% in most cases.
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