In this study, several tests were performed to analyse the triboelectrostatic charging behaviour of an artificially mixed sulfidic copper ore consisting of quartz and chalcopyrite. To check the surface charge of the pure mineral samples, they were analysed in a self-developed triboelectrostatic charging unit. After that, the artificially mixed …
The samples used in the macroscale particle charging tests are pure quartz particles. Prior to each experiment, coarse pure quartz particles (∼3 mm) were sorted and then ground to a grain size of 600–1250 μm by a ceramic mill (XPM-φ120 × 3, Wuhan Rock Grinding Equipment Manufacturing Co., Ltd., China) and the particles larger than 1250 …
Table 1 shows the characteristics of fly ash particles with different size. It can be seen from Table 1 that: (1) the residue on the 45 μm sieve was 32.43%, the overall loss-on-ignition was 14.70%, and the quality of original fly ash was poor, even lower than the grade 3 ash standard [15]; (2) the loss -on-ignition of pulverized coal ash samples with …
During triboelectrostatic separation, the 105 μm × 150 μm fraction of clean coal has the highest vitrinite content, whereas inertinite tends to concentrate at tailings <74 μm under the co-effect of separation granularity limit and electrical characteristics of macerals; this conclusion has a certain guiding significance to maceral separation.
A candidate processing technology for producing concentrated ilmenite, from which oxygen can be extracted for human use on the moon, is the triboelectrostatic separation method. In this research, an experimental study was conducted to investigate the fundamentals of triboelectrification and the potential of applying these fundamentals …
PANAT et al.: EFFECTS OF TRIBOELECTROSTATIC CHARGING BETWEEN POLYMER SURFACES 945 Fig. 3. Integrated circuit package sticking with the handler due to elec-trostatic forces. Fig. 4. Map showing sticking of flat Si pieces with the handler for different weights of Si. Y indicates that the triboelectrostatic force is sufficiently high
This study investigates the rotary triboelectrostatic separation of a fine coal and silica mixture (0.15–1 mm) to simulate the coal and silica minerals, which commonly exist in run of mine coal. The RTS with innovative designed particle charging and separation units was used to beneficiate the mixture.
The airflow in rotary triboelectrostatic chamber was annular and composed of rotating airflow and inlet airflow. The airflow expanded along the electrostatic separation chamber was the combination of inlet airflow, rotating airflow and co-flow. Two representative sections A (x = 0 mm) and sections B (x = 60 mm) in x direction were …
Tel: +1-859-2572953; E-mail address: [email protected] Dry coal fly ash cleaning using rotary triboelectrostatic separator TAO Daniel, FAN Mao-ming, JIANG Xin-kai Department of Mining Engineering, University of Kentucky, Lexington, KY 40506, USA Abstract: More than 80 million metric tons of fly ash is produced annually in the U.S. as …
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