Study of Metal Recovery from Printed Circuit Boards by …
In electrostatic separation, the efficiencies obtained were higher for the smaller particle size (−0.3 mm). ... The new solders are mainly composed of Sn, Ag and Cu. Other precious metals such as gold and palladium are also found in PCBs. Iron and nickel are commonly found in electronic components of the board. For epoxy resin, some metal ...
Recovery of metals and valuable chemicals from waste …
Eddy current separation, 43,51–53 corona electrostatic separation, 14,54 and triboelectric separation 55 are the three main methods used in the industry. The electrostatic …
Utilization of magnetic and electrostatic separation in the recycling
The use of magnetic separation and electrostatic separation was efficient to obtain fractions with relatively high concentrations of metals starting from scrap of printed circuit boards. The fractions magnetically separated reached 43% of iron on average in whole printed circuit boards scrap (PCB) and 46% of iron in electronic components scrap ...
Study on the extraction and separation of precious metals …
It was applied in the treatment of multi-component industrial wastewater containing high-concentration complex precious metals. We focused on the main influencing factors of the precious-metal-ion extraction process and the extraction reaction mechanisms, and realized an efficient separation and recovery of four precious metals.
Application of corona discharge and electrostatic force to …
The results show that (1) a two-step crushing process could completely strip metals from base plates; (2) the effect of aggregation opposed the production on fine powders; (3) particle sizes between 0.6 and 1.2 mm are most feasible for separation in industrial application; (4) Corona electrostatic separation is an efficient and …
Recovery of precious metals from processed wastewater: …
It involves the mechanical breaking and crushing of precious metals in the processed wastewater followed by separation . This process follows three basic steps, which are crushing, corona electrostatic separation, and metallic material recovery as described by Huang et al. (2009) and Zeng et al. (2014). An appreciable benefit of the …
Urban mining of E-waste: treasure hunting for precious nanometals
Precious metals can be found in the components such as PCBs, connectors as well as in the solders; for example, PCB from an LCD TV contains 575 ... electrostatic separation mostly eddy current separation, and magnetic separation (Hsu et al., 2019). Process of physical recycling is well demonstrated by Kaya (Kaya, 2016). When the …
(PDF) Extraction and separation of non-ferrous and precious metals …
PDF | On Mar 25, 2018, Eliza Istrate and others published Extraction and separation of non-ferrous and precious metals from waste of electrical and electronic equipment through ferric sulfate ...
Recycling of waste printed circuit boards: A review of current
Biometallurgy has been used for recovery of precious metals and copper from ore for many years [47], ... Movement behavior in electrostatic separation: recycling of metal materials from waste printed circuit boards. J. Mater. Process. Tech., 197 (2008), pp. 101-108. View PDF View article View in Scopus Google Scholar
Supergravity separation for recovering metals from waste …
A three-step separation process was adopted to selectively recover metals or alloys and to concentrate precious metals. Total recovery values for Pb, Sn, Zn, and Cu were 96.37%, 92.32%, 93.71%, and 97.90%, respectively. ... Utilization of magnetic and electrostatic separation in the recycling of printed circuit boards scrap. Waste Manage. …
Electrostatic Separation | SpringerLink
The electrostatic separation technique is generally utilized for recycling metallic materials from electronic waste [1,2,3,4,5,6].This dry separation technology is also successfully employed in mineral processing [7,8,9,10] and the food industry [11, 12].As a perfectly dry method, electrostatic separation is an environmentally friendly technique …
Gravity and Electrostatic Separation for Recovering …
efficiency of gravimetric and electrostatic separation was performed. A pre-treatment composed of comminution, granulometric, and magnetic separations was performed be- ... (Cu, Zn), precious metals (Au, Ag, Pd), and heavy metals even higher than those in natural minerals [8]. The chemical composition is also used to distinguish the
Electrostatic separation of metals and plastics from …
The paper presents the main conclusions of authors' 15-year involvement in theoretical study, laboratory experimentation, equipment development and industry application of electrostatic separation technologies. The roll-type separator with combined corona-electrostatic field is the most advantageous technical solution when the purpose is to …
A new two-roll electrostatic separator for recycling of metals …
DOI: 10.1016/j.jhazmat.2008.03.088 Corpus ID: 28745467; A new two-roll electrostatic separator for recycling of metals and nonmetals from waste printed circuit board. @article{Jiang2009ANT, title={A new two-roll electrostatic separator for recycling of metals and nonmetals from waste printed circuit board.}, author={Wu Jiang and Li Jia …
Recovery of metals and nonmetals from electronic waste by
After size reduction, mainly physical separation processes employing gravity, electrostatic, magnetic separators, froth floatation, etc. have been critically reviewed here for separation of metals and nonmetals, along with useful utilizations of the nonmetallic materials. The recovery of metals from e-waste material after physical separation ...
Impact of Grinding of Printed Circuit Boards on the …
These certainly include the methods of grinding and electrostatic separation. The efficiency of metal recovery using these methods depends on the degree of metal release. Therefore, in order to ensure high efficiency of electrostatic separation, PCBs should be ground to release the useful components (i.e., metals) from plastic and …
Efficient separation of precious metals from computer …
Magnetic separation to extract ferrous particles, eddy current, and high voltage electrostatic separators to separate the metal constituents are also utilized (Xue M. and Xu Z ... The e-waste volume reduction and precious metals separation at the liberation step was considered.-The hydrocyclone (3 bar), and the DGM (500 rpm, 22 °C …
A Novel Designed Bioreactor for Recovering Precious Metals …
In corona-electrostatic separation, precious metals (Au or Ag), present in waste PCBs in trace concentrations, were missed. In fact, physical treatment presents inability to recover precious...
Gravity and Electrostatic Separation for Recovering Metals …
PCBs typically consist of more than 60 different types of elements, having a content of base metals (Cu, Zn), precious metals (Au, Ag, Pd), ... The conductive material, from electrostatic separation, had metal concentrations of about 88% for the class size <0.3 mm and 62% for the >1.18 mm one. This lower content for the coarsest grain size …
Recovery of Metals and Nonmetals from Waste Printed …
The basic structure of the PCBs is the Cu-clad laminate consisting of fiber glass-reinforced epoxy resin and a number of metallic materials including precious metals. The concentration of precious metals especially Au, Ag, Pd and Pt is much higher than their respective primary resources, making waste PCBs an economically attractive …
Optimizing the operating parameters of corona electrostatic separation
The purity of precious metals in PCBs is more than 10 times that of rich-content minerals. Therefore, the recycling of PCBs is an important subject, not … Optimizing the operating parameters of corona electrostatic separation for recycling waste scraped printed circuit boards by computer simulation of electric field
Recovery of residual metals from − 0.5 mm non-metallic …
Electrostatic separation is a cleaning physical method to recover metals from waste printed circuit boards (WPCBs), but it has poor separation efficiency for finer sized fractions.
A new two-roll electrostatic separator for recycling of metals …
1.. IntroductionElectrostatic separation, defined as the selective sorting of charged or polarized bodies in an electric field [1], [2], presents an effective way for recycling metals and nonmetals from waste electrical and electronic equipment (WEEE) [3].Some kinds of electrostatic separators have been utilized in laboratory experiments …
Electrostatic Separation for Recovering Metals and …
Electrostatic separation is an effective and environmentally friendly method for recycling comminuted waste printed circuit boards (PCB). As a classical separator, the roll-type corona-electrostatic separator (RTS) has some advantages in this field. However, there are still some notable problems, such as the middling products and their further …
Gravity and Electrostatic Separation for Recovering Metals …
The results obtained from gravity separation showed a product with metallic concentrations of 89% and 76% for particle sizes of 0.3–0.6 mm and 0.6–1.18 mm, …
Electrostatic Separation of Minerals | Bunting
Electrostatic separation enables the separation of a wide range of minerals and this example, separating Pyrite from Silica Sand, provides a good example of the separation process. A feed of conducting (Pyrite FeS 2 ) and non-conducting (Silica Sand SiO 2 ) powders is fed via a vibratory feeder onto an earthed, stainless-steel roll …
Electrostatic and magnetic separations for the recovery of metals …
The aim of the study was to recover metals from e-scrap using electrostatic and magnetic separation successively. The type of phases in the four magnetic separation products was determined by X-ray diffraction (XRD). Three grain classes were tested: 2.00 - 0.56, 0.56 - 0.32 and 0.32 - 0.10 mm. Based on the tests, it …
Recovery of precious metals from processed wastewater: …
Precious metals are present in processed wastewater as pollutants. Conventional recovery methods are associated with limitations. Bio- and nano-sorption …
Optimizing the operating parameters of corona electrostatic separation
The purity of precious metals in PCBs is more than 10 times that of rich-content minerals. Therefore, the recycling of PCBs is an important subject, not only from the viewpoint of waste treatment, but also with respect to the recovery of valuable materials. ... The corona electrostatic separation (CES) was the effective method for separating ...
Study of Metal Recovery from Printed Circuit Boards by …
In electrostatic separation, the efficiencies obtained were higher for the smaller particle size (−0.3 mm). Keywords: printed circuit board (PCB); physical-mechanical separation; …