Jigging: A Review of Fundamentals and Future Directions

Abstract

For centuries, jigging has been a workhorse of the mineral processing industry. Recently, it has also found its way into the recycling industry, and the increasing concerns related to water usage has led to a renewed interest in dry jigging. However, the current scenario of increasing ore complexity and the advent of smart sensor technologies, such as sensor-based sorting (SBS), has established increasingly challenging levels for traditional concentration methods, such as jigging. Against this background, the current review attempts to summarize and refresh the key aspects and concepts about jigging available in the literature. The configuration, operational features, applications, types, and theoretical models of jigging are comprehensively reviewed. Three promising paths for future research are presented: (1) using and adapting concepts from granular physics in fundamental studies about the stratification phenomena in jigs; (2) implementing advanced control functions by using machine vision and multivariate data analysis and; (3) further studies to unlock the potential of dry jigs. Pursuing these and other innovations are becoming increasingly essential to keep the role of jigging as a valuable tool in future industry.

Construction and Demolition Waste Recycling through Conventional Jig, Air Jig, and Sensor-Based Sorting: A Comparison

“…A conventional jig from the AllMineral Company (Allmineral Aufbereitungstechnik GmbH & Co. KG, Duisburg, Germany), model AllJig S 400/600X400 ® , was used to perform the tests (Figure 2). The optimization of the best jigging parameters was determined and was fixed for all tests [68,69]: Expansion, 40 mm; frequency 70 pulses per min; height of water above the particle layer, 30 mm; and test duration, 240 s. bricks, and 3800 g of gypsum. The amount of each material was chosen to completely fulfill each jig chamber (Figure 2).…”

“…During the physical separation in the interface of the particle layers to generate the products. It is worth emphasizing that the error associated with the bed cut (during the discharge of the product) is presumably lower for industrial jigs, as the bed separation and the vertical motion (pulse) occur simultaneously [69], which is not the case for batch jigs.…”

An Online Flexible Sorting Model for Coal and Gangue Based on Multi-Information Fusion

“…The manual sorting method is gradually eliminated because of its poor working environment and low efficiency. Mechanical washing mainly includes the heavy medium method [3], jigging method [4] and flotation method [5], which have problems such as easy loss of separation equipment, waste of water resources, increase in production cost caused by drying treatment and medium recovery [6], [7]. The ray recognition [8] method is harmful to the human body, and the mechanical vibration [9] method is only applicable to a few scenes.…”

Challenges in Raw Material Treatment at the Mechanical Processing Stage

“…An exponential increase in the grinding energy can be observed, together with further decreasing the size of already fine material;  The optional application of separation within comminution circuits, especially devices based on physical separation, such as jigs [19]. Jig separation has a long history of existence in technological circuits of mechanical processing or raw materials; however, many investigations aiming to improve the process for specific conditions and individual materials have been carried out [20,21]. This cost-efficient technology may give favorable results in the extraction of useful mineral amongst certain particle size fractions.…”