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CN-121988452-A - Improved magnetic ore particle size grading device and application method thereof

CN121988452ACN 121988452 ACN121988452 ACN 121988452ACN-121988452-A

Abstract

The invention relates to the technical field of screening machinery and discloses an improved magnetic ore particle size grading device and a use method thereof, wherein the device comprises a main screening device, a magnetic ore particle size grading device and a magnetic ore particle size grading device, wherein the main screening device comprises a box body with an opening at the top, a plurality of screen discs with different meshes are detachably arranged in the box body, and the screen discs are arranged in the box body at intervals in parallel along the vertical direction; the automatic screening device comprises a main screening device, a vibrating module, a magnetic module and an automatic spraying system, wherein the main screening device is arranged on the upper side of the main screening device, the vibrating module is connected below the main screening device and used for vibrating the main screening device, the magnetic module is arranged on the bottom surface in the box body and used for generating an adjustable magnetic field to prevent magnetic ore particles from agglomerating in the screening process, and the automatic spraying system is arranged above the main screening device and used for spraying into the box body. The invention solves the core problems of low precision, poor efficiency and poor reproducibility of the traditional wet screening method in processing magnetic fine ore by organically combining magnetic anti-agglomeration, high-frequency vibration and intelligent spraying technologies, and realizes more controllable size classification.

Inventors

  • HE MINGQIAN
  • CHEN FULIN
  • HUANG YAN
  • WANG ZHIJIE

Assignees

  • 攀钢集团攀枝花钢铁研究院有限公司

Dates

Publication Date
20260508
Application Date
20260122

Claims (10)

  1. 1. An improved magnetic ore particle size classification apparatus comprising: the main screening device comprises a box body with an opening at the top, a plurality of screen plates with different meshes are detachably arranged in the box body, and the screen plates are arranged in the box body at intervals in parallel along the vertical direction; A vibration module connected below the main screening device for vibrating the main screening device; The magnetic module is arranged on the bottom surface in the box body and used for generating an adjustable magnetic field so as to prevent magnetic ore particles from agglomerating in the screening process; and the automatic spraying system is arranged above the main screening device so as to spray into the box body.
  2. 2. The improved magnetic ore particle size classification apparatus of claim 1, wherein the magnetic module comprises a permanent magnet array and an electromagnetic assist member.
  3. 3. The improved magnetic ore particle size classification apparatus according to claim 2, wherein the permanent magnet array comprises a plurality of neodymium-iron-boron magnets arranged in N-S-N alternating polarities, and the electromagnetic auxiliary component is a pulsed electromagnetic coil.
  4. 4. The improved magnetic ore particle size classification apparatus of claim 1, wherein the automatic spray system further comprises: the main pipeline is connected with an external water source; The water distribution pipes are vertically connected with the main pipe and are arranged at intervals along the horizontal direction of the screen disc, the end part of each water distribution pipe is connected with an angle-adjustable spray header, and an adjustable water valve is arranged at the joint of each water distribution pipe and the main pipe.
  5. 5. The improved magnetic ore particle size classification apparatus of claim 4, wherein the water distribution conduit is a hose.
  6. 6. The improved magnetic ore particle size classifying device according to claim 1, wherein the box body is provided with a transparent glass door which can be opened and closed, and a plurality of horizontal clamping grooves for clamping different mesh sieve trays are arranged in the box body.
  7. 7. The improved magnetic ore particle size classification apparatus of claim 1, wherein a removable water bin is also provided within the main screening apparatus housing.
  8. 8. The improved magnetic ore particle size classification apparatus of claim 1, wherein the vibration module comprises a housing and a plurality of electromagnetic vibrators symmetrically disposed on the bottom of the tank.
  9. 9. An improved method for using a magnetic ore particle size classifying device is characterized by comprising the following steps: s1, installing screen trays with different meshes in a main screening device, and starting an automatic spraying system and a vibration module; S2, feeding a magnetic ore sample to be classified onto a sieve tray in the box body through a top opening of the box body; s3, observing a screening process, starting a magnetic module and adjusting the magnetic field intensity of the magnetic module in real time until the ore sample is free from caking; And S4, after the preset screening time is reached, sequentially closing all the modules, taking out the screen tray and the undersize products, and respectively drying, weighing and calculating.
  10. 10. The method of claim 9, wherein the vibration frequency of the vibration module is set to 50-100 Hz and the magnetic field strength of the magnetic module is adjusted to 0.5-1.5T.

Description

Improved magnetic ore particle size grading device and application method thereof Technical Field The invention relates to the technical field of screening machinery, in particular to an improved magnetic ore particle size grading device and a using method thereof. Background The particle size classification is a key link in the ore dressing process, and is not only a core index for evaluating the ore grinding efficiency, but also a key bridge for connecting crushing ore grinding and a subsequent sorting process. The accuracy of classification directly determines the optimization direction of grinding link parameters, and the recovery rate and the resource utilization rate of ores with different particle sizes in flotation, magnetic separation and other processes. Thus, classification efficiency and accuracy are highly dependent on the optimization of the performance and operating parameters of the dedicated equipment. At present, the traditional water screen device relies on water flow scouring and mechanical vibration to separate mineral particles, has low screening efficiency on fine-particle-grade or magnetic minerals such as vanadium titano-magnetite, ilmenite and the like, is easy to block a screen, and reduces the effective aperture of the screen. The existing particle size classifying equipment has the problems of poor controllability, low classifying precision, long sieving time and the like, particularly when the magnetic ore is processed, typical magnetic minerals such as vanadium titano-magnetite, ilmenite and the like are taken as examples, when the particle size of the magnetic mineral is reduced to a certain fineness, the magnetic attraction between particles can be obviously enhanced, and firm magnetic agglomerates are extremely easy to form in a wet sieving environment. These agglomerates not only are difficult to pass through the screen with corresponding pore sizes, but also adhere to and accumulate on the screen wires, causing serious physical blockage of the screen. The result is a screen with drastically reduced or even completely closed effective screening pore size, resulting in extremely slow screening rates, inclusion of large amounts of undersize fines in the oversize, and ultimately, severe distortion of the results of the particle size analysis. Accordingly, there is a need in the art for an improved apparatus for size classification of magnetic ores. Disclosure of Invention In view of the above, an object of the embodiments of the present invention is to provide an improved magnetic ore particle size classification apparatus and a method for using the same, which solves the core problems of low precision, poor efficiency and poor reproducibility in the conventional wet screening method when processing magnetic fine ore by organically combining magnetic anti-agglomeration, high-frequency vibration and intelligent spraying technologies, and realizes more controllable particle size classification. In view of the above object, an embodiment of the present invention provides an improved magnetic ore particle size classification apparatus, which is characterized by comprising: the main screening device comprises a box body with an opening at the top, a plurality of screen plates with different meshes are detachably arranged in the box body, and the screen plates are arranged in the box body at intervals in parallel along the vertical direction; A vibration module connected below the main screening device for vibrating the main screening device; The magnetic module is arranged on the bottom surface in the box body and used for generating an adjustable magnetic field so as to prevent magnetic ore particles from agglomerating in the screening process; and the automatic spraying system is arranged above the main screening device to spray into the box body. In some embodiments, the magnetic module includes a permanent magnet array and an electromagnetic assist component. In some embodiments, the permanent magnet array comprises a plurality of neodymium-iron-boron magnets, the plurality of neodymium-iron-boron magnets are arranged in N-S-N alternating polarities, and the electromagnetic auxiliary component is a pulse electromagnetic coil. In some embodiments, the automatic spray system further comprises: a main pipe, which is connected with an external water source; The water distribution pipes are vertically connected with the main pipeline and are arranged at intervals along the horizontal direction of the screen tray, the end part of each water distribution pipe is connected with an angle-adjustable spray header, and an adjustable water valve is arranged at the joint of each water distribution pipe and the main pipeline. In some embodiments, the water distribution conduit is a hose. In some embodiments, the box body is provided with a transparent glass door which can be opened and closed, and a plurality of horizontal clamping grooves for clamping different-mesh sieve trays are arranged