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...

Related articles:

Issue 12/2010

Valuable waste

Recovery of chromite values from ferrochrome industry flue dust

1 Introduction Waste is a source of secondary raw materials, but at the same time can negatively impact the natural environment and public health. The flue dust generated from the ferrochrome industry...

Issue 1-2/2009

Reduction of Magnetic Discoloring Mineral Impurities from Kaolin Clay Using High Intensity and High Gradient Magnetic Separators

1. Introduction Kaolinite occurs in sub-µm size and white in colour and its chemical composition varies from 46.54 % SiO2 and 39.50 % Al2O3 with 13.96 % H2O. The kaolinite samples are known as...


Beneficiation of a siliceous limestone sample

1 Introduction Limestone, a sedimentary rock, mostly compo-sed of calcite with some minerals like quartz, feldspar and mi-ca. The major industries which consume limestone are: cement production,...

Issue 10/2019 Placer gold

The use of intermittently operated launders in the recovery of heavy minerals

1? Current situation Gold has been recovered from fluviatile sediments for thousands of years. The saga of the Golden Fleece, for example, has its background in the use of sheep fleece to trap gold...


New Eriez® Hybrid Wet Drum Separators achieve unsurpassed magnetic recovery in heavy media circuits

Eriez® introduced its new Hybrid Wet Drum Separator, developed to enhance magnetic recovery in heavy media circuits. The hybrid element uses ceramic and high energy rare earth magnets in the circuit...