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System and method for evaluating floatability of particles

A particle and buoyancy technology, which is applied in the field of particle flotation, can solve problems such as inaccurate judgment, and achieve the effect of simplifying the test operation process, shortening test time, and less equipment

Active Publication Date: 2019-04-05
CHINA UNIV OF MINING & TECH
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Problems solved by technology

[0005] In view of the above analysis, the present invention aims to provide a system and method for judging the buoyancy of particles to solve the problem of inaccurate judgment in the prior art by only judging the buoyancy of samples by induction time

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  • System and method for evaluating floatability of particles

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Embodiment 1

[0064] Such as figure 1 As shown, the liquid phase (flotation agent) is contained in the sample tank 5, first the particles to be measured are put into the bottom of the sample tank 5 and the particle bed is kept flat, and the sample tank 5 with the particles to be measured is placed on the three-axis On the sample stage 4, turn on and adjust the light source 2 and the high-speed camera 3, and manually adjust the relative distance between the particle and the lower end of the T-shaped capillary D through the three-axis sample stage 4, so that a clear image of the capillary and the particle bed can be obtained on the computer 7 . Through the hose 8 with a stop valve, the gas injector 9 generates air bubbles of appropriate size and closes the stop valve. The distance between the lower end of the bubble and the particle bed is fine-tuned by moving the drive unit 1 to the upper stage B, and the controller 6 is turned on. Control the movement of motion platform C (movement distanc...

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Abstract

The invention relates to a system and method for evaluating the floatability of particles, and belongs to the technical field of particle floatation. The problem that inaccurate evaluation is caused due to the fact that the floatability of samples can be judged only by induction time in the prior art is solved. The measurement system of floatation particle bubbles comprises a motion drive unit, avideo monitoring unit and a displacement acquisition unit; the displacement acquisition unit is used for measuring the critical desorption amplitude of the particles falling off from the bubbles; themotion drive unit is used for driving particle bubble flocs to perform simple harmonic vibration; the video monitoring unit is used for monitoring the adhesion state of the particles and the bubbles,and when the particles and the bubbles are desorbed, a data acquisition system collects the critical desorption amplitude. The test method comprises the steps that the bubbles are generated, the bubbles approach the samples, the data of inducing time is acquired, the samples, the bubbles and the flocs perform the simple harmonic vibration, and the data acquisition system acquires the amplitude. The system and method for evaluating the floatability of the particles realize the joint characterization of the particle floatability through the adhesion and desorption behavior between the particlesand the bubbles, and improve the accuracy of a test.

Description

technical field [0001] The invention relates to the technical field of particle flotation, in particular to a system and method for evaluating the floatability of particles. Background technique [0002] Flotation means that through the difference in surface properties between different particles (mainly the difference in hydrophilicity / hydrophobicity), in the solid-liquid-gas three-phase system of the pulp, through the selective adhesion between different component particles and air bubbles, the target composition is achieved. Separation of fractions from the rest of the components to achieve enrichment of useful components. For hydrophobic particles, the behavior between particles and bubbles is divided into three stages: the first stage, the collision between particles and bubbles; A three-phase perimeter is formed; in the third stage, particles slide along the bubble surface and finally adhere to the bubble surface. Among them, the time from the contact between the par...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/04G01N15/10
CPCG01N15/04G01N15/10G01N2015/1028
Inventor 邢耀文桂夏辉张友飞郭芳余曹亦俊丁世豪刘敏罗佳倩
Owner CHINA UNIV OF MINING & TECH
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