Mine Safety- A Modern Approach
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Coal Mine Safety
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Best Practices for Dust Control in Metal-Nonmetal Mining
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Understanding Human Error in Mine Safety
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Mine health and safety management
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Human Factors for the Design, Operation, and Maintenance of Mining Equipment
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Ergonomics Processes - Implementation Guide and Tools for the Mining Industry
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لیست کارگاه های آموزشی دومین کنفرانس ملی فناوری های معدنکاری ایران.

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⚜Dense medium separation

🔹Principle
DMS is a gravity separation process. In the strictest sense, it implies separation of lower-density particles from higher-density particles at a specific separating density regardless of size, shape, and other secondary influences. In industrial reality, such simplistic gravity separation is seldom so perfectly achievable though, with appropriate design and operational care, DMS is generally able to achieve separation very close to that predicted by theoretical
particle density considerations alone as size and shape play
a less dominant role compared with other gravity techniques. A well-designed DMS operation can therefore be regarded as being size-independent (Bosman,2007). It is generally more efficient in terms of separation sharpness than competing gravity processes like jigging and yet is considered the simplest of all gravity processes (Wills,1985).

DMS machines and plants achieve the separation of different density materials in fluid media, and the terms “floats” and “sinks” are therefore often used to describe the lighter and heavier fractions. In the context of iron ore beneficiation, the separation medium is invariably made up of a suspension of very fine ferrosilicon (FeSi) particles in water that performs as a dense liquid. The lighter particles staying buoyant in the medium (“floats”) are always the undesirable part, while the heavier, denser “sinks” represent the upgraded part of the ore. Iron ore beneficiation is therefore opposite to coal beneficiation where DMS is even more extensively used but where the floats represent the desired outcome. Another notable difference is that while coal DMS can use a cheaper medium made up of ground magnetite particles, the higher separation densities required in iron ore beneficiation (in the order of 3–4 kg/l) necessitate the use of relatively expensive FeSi.

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