Vertical-ring magnetic separator for deferrization of pulverized coal ash

A magnetic separator and fly ash technology, applied in the direction of high-gradient magnetic separator, etc., can solve the problems of weak magnetism of iron minerals and reduce the effect of magnetic separation to remove iron, so as to relieve the pressure of iron removal and improve the effect of iron removal , the effect of reducing production costs

Inactive Publication Date: 2010-07-28
CHINA SHENHUA ENERGY CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of removing iron from fly ash, since the magnetism of iron minerals is very weak, if the feeding method is adopted, iron minerals may pass through the medium under the action of gravity without being adsorbed, which reduces the efficiency of magnetic separation. Effect

Method used

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  • Vertical-ring magnetic separator for deferrization of pulverized coal ash
  • Vertical-ring magnetic separator for deferrization of pulverized coal ash
  • Vertical-ring magnetic separator for deferrization of pulverized coal ash

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] In Embodiment 1 of the present invention:

[0039] The background magnetic field strength is 12000Gs, the excitation current is 40A, the material of the steel mesh is 1Cr17, the distance between the dielectric layers of the steel mesh is 3mm, the thickness is 1mm, the grid size is 5mm×10mm, the wire stem width is 1.6mm, and the edge and corner direction is upward. At this time, the mesh The field strength of the shaped medium node can reach 22000Gs, which is 20% higher than that of the traditional vertical swivel induction wet strong magnetic separator.

Embodiment 2

[0041]The background magnetic field strength is 12000Gs, the excitation current is 40A, the material of the steel mesh is 1Cr17, the distance between the dielectric layers of the steel mesh is 2mm, the thickness is 1mm, the grid size is 3mm×8mm, the wire stem width is 1mm, and the edge direction is upward. At this time, the mesh The field strength of the dielectric node can reach 20000Gs.

Embodiment 3

[0043] The background magnetic field strength is 12000Gs, the excitation current is 50A, the material of the steel mesh is 1Cr17, the distance between the dielectric layers of the steel mesh is 5mm, the thickness is 1.5mm, the grid size is 5mm×10mm, the wire stem width is 2mm, and the edge and corner direction is upward. At this time, the mesh The field strength of the shape medium node can reach 22000Gs.

[0044] Compared with the rod-shaped medium, the surface area of ​​the expanded mesh medium is increased by more than 5 times, the magnetic adsorption capacity is greatly increased, and the probability of magnetic substances being adsorbed is greatly increased. Moreover, the magnetic field intensity and gradient induced at the corners of the expanded mesh are also greatly improved compared with the rod-shaped medium. .

[0045] Using the vertical ring magnetic separator for fly ash iron removal according to the present invention, the magnetic field distribution diagram after...

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Abstract

The invention discloses a vertical-ring magnetic separator for de-ironing of pulverized coal ash. The vertical-ring magnetic separator comprises a rotating ring, an induction medium, an upper iron yoke, a lower iron yoke, an exciting coil, a feeding opening, a tailing bucket and a water washing device, wherein the induction medium is arranged in the rotating ring. The exciting coil is arranged at the periphery of the upper iron yoke and the lower iron yoke, so as to lead the upper iron yoke and the lower iron yoke to become a pair of magnetic poles for generating a magnetic field in the vertical direction. The upper iron yoke and the lower iron yoke are respectively arranged at the inner and outer sides below the rotating ring. The induction medium is layers of steel plate meshes, each steel plate mesh is woven by wire peduncles, and ridge-shaped sharp corners are arranged at the edges of the wire peduncles. The upper iron yoke is connected with the feeding opening, the lower iron yoke is connected with the tailing bucket for discharging, and the water washing device is arranged above the rotating ring. By adopting the vertical-ring magnetic separator in the invention, the de-ironing effect is improved by 20%, and the effective de-ironing rate is increased to 80% from 60%; moreover, the pressure for de-ironing of solution in the subsequent process is relieved, the production cost is reduced, and the production efficiency is increased.

Description

technical field [0001] The invention relates to a magnetic separation device, in particular to a vertical ring magnetic separation machine for removing iron from fly ash. Background technique [0002] At present, the structural design of the vertical ring is aimed at magnetic separation rather than iron removal. The magnetic medium used in the original equipment is a cylindrical dielectric rod. In the process of ash iron removal, there may be some particles with fine particle size and weak magnetism that will not be adsorbed through the magnetic medium, which will reduce the iron removal effect. [0003] First, the purpose of the current vertical ring magnetic separator is to select iron from weakly magnetic iron ores, and ultimately iron ores with a certain grade need to be selected. Therefore, the design of structure and magnetic field strength is mainly for iron selection. Not iron removal. The vertical ring magnetic separator adopts a round bar-shaped stainless steel m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03C1/025
Inventor 张文辉郭昭华魏存弟王永旺徐少南吕飒
Owner CHINA SHENHUA ENERGY CO LTD
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