Corona Electrostatic Separator

Both the electrostatic and corona-electrostatic separation methods are suitable for removing the metallic particles from WEEE. The plate-type electrostatic separator is easier to build, operate, and maintain, as it has fewer moving parts. However, its performance is less impressive than that of the roll-type corona-electrostatic separator.

There are many kinds of electrostatic separators, and the common classification methods are: (1) According to mineral electrification, it can be divided into conductive electrified separator, triboelectric separator, dielectric separator, and thermoelectric adhesive separator.

The results of this study can be used in configuration optimization design of "Corona Type Cylindrical Electrostatic Separation" for separating seed and straw in agriculture …

When a corona discharge occurs and the air surrounding the electrode needles is broken down, ions are produced. Using these ions, reverse-polarity static electricity is neutralized, and static is eliminated. Introducing solutions for …

The experiments were carried out on a laboratory roll-type corona electrostatic separators, and the sparks were generated by introducing 16 calibrated copper pins in 40-g samples of granular insulating material (PVC; typical granule size: 1.5 mm) that were fed at a constant rate onto the surface of the grounded rotating roll electrode.

Electrostatic separation works on the natural conductivity properties between minerals in feed. Separation is between economic ore constituents, noneconomic contaminants, and gangue. The common units are high-tension plate and screen electrostatic separator. The electrostatic plate separators work by passing a stream of particles over a charged ...

Numerical investigation of the separation mechanism in an electrostatic aerosol-to-hydrosol separator by glow corona discharge: a quantitative comparison of the effects of ionic wind and Coulomb force. ... Many studies have been conducted on the modeling and simulation of the corona discharge and electrostatic aerosol precipitation in gas ...

In this paper, the roll-type corona electrostatic separator was used to separate metals and nonmetals from scraped waste PCBs. The software MATLAB was used to simulate the distribution of electric field in separating space. It was found that, the variations of parameters of electrodes and applied voltages directly influenced the distribution of ...

Current methodologies in electrostatic separation are mainly based on the electrostatic forces exerted on charged particles. Among these, corona roll-type separators are used for the sorting of metal/plastic mixtures, where the predominant force is the image force, acting on plastic particles that are charged via corona discharge.

A corona-electrostatic separator (Inbraz-Eriez, ESP-14/01S) was employed for the settings optimization in copper concentration from the synthetic mixture with copper proportions close to those found in computers PCBs and from a real WPCB sample. The equipment consists of a grounded roller, corona electrode and electrostatic electrode.

Charges and forces on conductive particles in roll-type corona-electrostatic separators Abstract: Mathematical modelling is a powerful tool in the optimization of electroseparation technologies and equipment. This paper proposes the use of a numerical method of field analysis to evaluate more accurately the charges and forces on millimeter-size ...

Journal Article: Food waste management using an electrostatic separator with corona discharge ... The empirical results reveal that the corona electrostatic separation is an environmental-friendly way in recovering foods from municipal waste. The efficiency of the separator, under same operating conditions, varies with the particle size of the ...

The experiments were carried out in a roll-type corona-electrostatic separator (Prodecologia, Rivne, Ukraine) (Fig. 2), using samples of two sizes of ABS and HIPS particles with equivalent radius of 1.63 mm and 2.41 mm respectively (Fig. 1). The particles, which were characterized by non-uniform shapes, were obtained by grinding of plastic ...

The aim of this paper is to demonstrate that a belt-type corona-electrostatic separator could be an appropriate solution for the selective sorting of conductive and …

Journal of Electrostatics, 29 (1993) 255-267 255 Elsevier Numerical analysis of the electric field of roll-type electrostatic separators* Lucian Dascalescu Laboratoire d'Electrostatique et de Matiaux Diectriques, C.N.R.S., B.P.166, 38042 Grenoble Cedex 9, France (Received April 17, 1992; accepted in revised form October 28, 1992) Summary Previous experiments pointed …

The electrode structure usually uses HV corona-electrostatic compound electric field, but a few of them use pure HV electrostatic field or pure corona electric field. Rotor electrostatic separator is comprised of four components: material feeder, main machine, HV DC power supply, and control system. The main machine is comprised of the drum ...

The objective of this paper is to validate the numerical model of the behavior of insulating particles in roll type corona-electrostatic separators by using a high-speed camera to record their trajectories. Such a validation is very important as it is likely to encourage: (i) the efforts made to expand the model in view of simulating a flow of ...

A laboratory "two-roll corona-electrostatic separator" (Fig. 2) was employed for the experimental study of granular mixture separation. It consists of two classical roll-type separators (part A and part B) that arrayed in the vertical position. Each one has the same electrode configuration (a grounded roll electrode, a wire-type corona ...

The spark that might occur between the electrodes of a roll-type corona-electrostatic separator at the passage of over-sized conductive particles disturbs the charging process of the insulating particles. This process is blocked by the annealing of the space charge and the electric field that accompanies any such discharge and lasts for the ...

A corona-electrostatic separator (Inbraz-Eriez, ESP-14/01S) was employed for the settings optimization in copper concentration from the synthetic mixture with copper …

The corona discharge electrostatic separator operates through numerous physical mechanisms, indirectly indicating that the electrostatic separation process is essentially influenced by multiple factors. Pablo et al. employed the electrostatic separation technique under conditions of negative high-voltage to reclaim particulate mixtures from ...

A systematic reseach has been performed, aiming at the optimization of the corona and electrostatic electrodes of roll-type high-tension separators for mixed granular solids.

The purpose of this paper is to investigate the corona discharge behavior of direct current in a point–plane electrostatic separator according bias voltage. Physically the corona discharge …

1.. IntroductionCorona electrostatic separator (CES) has been investigated extensively in the minerals processing industry. The rotor-type CES, using corona charging, is utilized to separate raw materials into conductivity and non-conductivity fractions [1].The extreme difference in the density and electrical conductivity between metallic and non-metallic …

The electrostatic separation is an effective method for recycling waste electrical and electronic equipment (WEEE). The efficiency of electrostatic separation processes depends on the ability of the separator. As a classical one, the roll-type corona-electrostatic separator has some advantages in recycling metals and plastics from waste printed circuit board (PCB).

In this study, the corona electrostatic separator was controlled as shown in Fig. 4(a) and (b).The electric vibratory feeder ensured a monolayer of granular material on the surface of the rotating roll (earthed electrode) which carried the particles to be separated through the high-voltage electrostatic field.

In the widely-used roll-type corona-electrostatic separator, a high-intensity electric field is generated between a grounded electrode and one or several electrodes connected to a high-voltage supply, which achieve the corona-charging of non-conductive materials and the trajectories control of the electrostatic-induction-charged conductive ...

This study developed an efficient and integrated process for recovering valuable materials from waste MLCCs by chloride metallurgy (CM) and corona electrostatic separation (CES). In CM, NH 4 Cl was used as the …

Corona electrostatic separation is an important technique suitable for separating metals from nonmetals. A high-voltage electrostatic field is generated by a corona electrode …

However, how to effectively and in an environmentally friendly manner recycle waste MLCCs is seldom considered. This study developed an efficient and integrated process for recovering valuable materials from waste MLCCs by chloride metallurgy (CM) and corona electrostatic separation (CES). In CM, NH 4 Cl was used as the chlorinating agent.