The Influence of Selected Properties of Particles in the Jigging Process of Aggregates on an Example of Chalcedonite

Agnieszka Surowiak,Agata Stempkowska,Tomasz Niedoba,Tomasz Gawenda,Alona Nad

doi:10.3390/min10070600

Agnieszka Surowiak, Agata Stempkowska + Show 3 more

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https://doi.org/10.3390/min10070600

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Journal: Minerals	Publication Date: Jun 30, 2020
Citations: 7	License type: CC BY 4.0

Affiliation: AGH University of Krakow

Abstract

The influence of the physical, geometric and chemical properties of particles on the results of aggregate separation by means of a laboratory ring jig is presented in this paper. The experiment was based on separation of chalcedonite particles in a narrow particle size fraction composed separately of regular and irregular particles, which was prepared in accordance with patent inventions. On its basis, the geometric properties—projection diameter and (volumetric and dynamic) shape coefficients—as well as physical properties—particle density—were determined in products of the regular and irregular particles. The terminal settling velocities of the regular and irregular particles were calculated for a randomly selected sample of particles in each obtained separation product. The statistical analysis of the geometric properties of the particles allowed to evaluate the influence of these parameters on aggregate processing with respect to selection of particles homogenous in terms of their shapes. The comparison of the particle shapes’ influence on the chalcedonite feed separation effects was made by the means of the values of the shape coefficients: the dynamic and volumetric ones. Additionally, tests were carried out using Raman spectroscopy in order to determine the mechanisms of density change in the aggregate. The research goal was realised through detecting and analysing the polymorphic forms of the silica and allogenic minerals precipitated on the surface and inside the chalcedonite particles.

Highlights

Beneficiation of raw materials is a process crucial to provide a product with the appropriate qualitative parameters and adequate strength properties, as required by a customer
The purpose of the experimental research was to investigate the possibility of mineral aggregate processing by means of jigging as well as to determine the settling velocity of the chalcedonite sample’s particles for the feed consisting of regular and irregular particles
The presented results of the investigation concerning beneficiation of chalcedonite separated in a jig demonstrated the possibilities to use this process to separate particles in industrial conditions provided that the applied processing methods are based on patented inventions PL233689 and PL23318B1, which allow to prepare the material for the beneficiation process in the appropriate way

Summary

Introduction

Beneficiation of raw materials is a process crucial to provide a product with the appropriate qualitative parameters (like a useful component grade or removal of pollutants) and adequate strength properties, as required by a customer. Ensuring such appropriate product parameters, apart from fulfilling customers’ expectations, is significant because of the influence on the natural environment and allows to rationally distribute materials for various branches of the economy in accordance with the rule of optimal use. In recent years, a high demand for good quality aggregates caused the development of structural solutions for the jigs They are mainly used to clean sand and gravel feeds by removing the organic and mineral pollutants that occur in their composition. The water pulsation angle in a jig is different, which allows to differentiate the course of a pulsation cycle in a working bed, and depends on the interval loads and quality of the products separated from them [1]

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