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Apparatus and method for measuring charge amount of flat-plate particles using charge neutralization

A measuring device, a flat-panel technology, applied in the direction of measuring devices, measuring electrical variables, instruments, etc., can solve the problem of not being able to measure the absolute charge of particles, and achieve the effect of convenient operation and accurate measurement

Inactive Publication Date: 2020-08-11
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a flat-plate particle charge measurement device and method using charge neutralization to solve the problem that the existing charge measurement device cannot measure the absolute charge of particles

Method used

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  • Apparatus and method for measuring charge amount of flat-plate particles using charge neutralization
  • Apparatus and method for measuring charge amount of flat-plate particles using charge neutralization
  • Apparatus and method for measuring charge amount of flat-plate particles using charge neutralization

Examples

Experimental program
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Effect test

Embodiment 1

[0044] It is used for the measurement of particle charge and charge-to-mass ratio.

[0045] Before the measurement, connect the positive plate 9 of the measuring device with a high-voltage power supply, ground the negative plate 10, and turn on the computer 4 and the fan 2. During the measurement, the charged particles are in the vibrating feeder 3. When the vibrating feeder 3 is working, the charged particles 14 enter the measuring device under the pressure of the compressed air 15. At this time, the numerical control is input into the mechanical arm controller 12 The mechanical arm 13 and the pulling wire 16 adjust the position of the colliding particle 11; then the charged particle 14 obliquely collides with the colliding particle 11 in the measuring device, and neutralizes a part of the charge. The trajectory of the charged particle 14 after the collision is the collision trajectory 5, as shown in figure 1 Shown in C. Move toward the positive plate 9 of the particle, and ...

Embodiment 2

[0048] For the measurement of the ratio between differently charged particles.

[0049] as attached figure 1 As shown in Figure 2, the connection mode and working principle of embodiment 2 and embodiment 1 are the same, and the main differences are:

[0050] The colliding particles of Example 2 are not in contact with the charged particles. The trajectory at this time is the non-collision trajectory 8, as attached figure 1 Shown in C'. At this time, the colliding particles 11 and the wire 16 are charged, and the two can be equivalent to a wire electrode with a large curvature, which will form a corona electric field, and the sensor 6 becomes another electrode because it is a plane. Under the action of high voltage, the air around the wire electrode is broken down, so that the charged particles are deflected or deviated from the wire electrode, and then deflected to the sensors on both sides. At this time, the computer needs to simultaneously calculate the mass and charge o...

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Abstract

The present invention relates to a flat-plate particle charge amount measurement device and method by employing charge neutralization. There are two layers of wall surfaces of the measurement device,a positive pole plate and a negative pole plate are in the two layers of wall surfaces, a pressure sensor is pasted at the inner layer of the inner layer of wall surface, an impact particle fixing rodis connected with the wall surfaces through a sliding pad and is provided with impact particles, and the impact particles are connected with the tail end of a mechanical arm through a stringing in acompression and contact mode. Charged particles enter the measurement device under the carrying of compressed air and generate oblique impact with the impact particles in the measurement device, and the charged particles after impact are moved towards the positive pole plate of the particles and are in contact with the pressure sensor. The sensor can record the contact positions with the particlesand the speeds and the directions of the particles. Data are input into a computer through a data transmission line; and the mass, the charged amount and the charge-to-mass ratio of a single chargedparticle are calculated according to the compiled program and the formula. Through a lot of measurement, the charged amount of electrification by friction can be obtained. The method and the device provided by the invention are convenient to operate and accurate in measurement, can measure the absolute electric charge and the mass of the particles, can measure the charge-to-mass ratios of the particles, can be used for measurement of the charged amount and can be used for measurement of the proportion of the particles with different charges.

Description

technical field [0001] The invention relates to the field of particle charge measurement, in particular to a flat-plate particle charge measurement device and method using charge neutralization. Background technique [0002] Electric beneficiation is a very effective physical beneficiation method that utilizes the electrical differences of various minerals and materials in a high-voltage electric field for separation, and it belongs to dry separation. Because electric separation has the characteristics of simple process, economy, no waste water, no environmental pollution and so on. Tribocharging is a selective charging process caused by sufficiently strong contact between mineral particles or between them and the surface of a suitable ditch material. Triboelectric charging technology can replace other sorting processes to solve many problems satisfactorily, and often can get better results. Triboelectric separation is one of the basic technologies in the field of mineral p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R29/24
CPCG01R29/24
Inventor 李海生李超永温晓龙陈师杰孙猛陈英华章新喜
Owner CHINA UNIV OF MINING & TECH