Concentrated

Gravity concentration kinetics of red sediment placer minerals

Summary: In the present investigation, a new deposit, red sediments of badlands topography of ­Bhimunipatnam associated with placer heavy minerals is chosen to study the gravity concentration kinetics on the misplacement of heavy minerals and recovery of heavy minerals using a mineral separator. The results of kinetics on different size fractions indicate that all the size fractions of deslimed feed follow first order kinetics At optimum conditions of deck angle and amplitude, a combined product (cleaner and scavenger) obtained contains 95.6 % grade (heavy minerals) with 29.6 % yield and 96.2 % recovery from a feed ­containing a total of 29.4 % heavy minerals.

1 Introduction

Gravity concentration is one of the oldest mineral beneficiation processes which has evolved over the decades and continues to play an important role in modern mineral processing operations. Gravity concentration has been used throughout the ages to separate minerals, with many of the historic methods still used to the present day. More recently gravity concentration has been reassessed due to the relative simplicity of gravity processes and the fact that they create significantly less environmental pollution. Gravity separation does not require the use of chemicals in the...

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