Permanent magnetism backwashing filter for removing ultrafine iron powder in alkali lye and method thereof
An ultra-fine iron powder, backwashing technology, applied in the field of magnetic filtration, can solve the problems of inapplicability and whether it is resistant to alkali liquid corrosion is not clearly explained, and achieves the effect of reducing maintenance costs, production costs, and compact equipment.
Active Publication Date: 2017-01-11
ANGANG STEEL CO LTD
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Problems solved by technology
The magnetic filter device is only suitable for the filtration of fine magnetizable particles, not for the filtration of ultra-fine iron powder in cleaning lye, and whether it is resistant to lye corrosion is not clearly stated
Method used
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[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0026] The invention provides a method for removing a permanent magnetic backwash filter of ultrafine iron powder in lye, comprising the following steps:
[0027] Permanent magnetic backwash filter to remove ultrafine iron powder in lye such as figure 1 , figure 2 and image 3 As shown, 1—alkali inlet pipe; 2—electric valve for lye inlet; 3—filter cartridge lye inlet pipe; 4—permanent magnet; 5—hot flushing water pipe; 6—hot flushing water electric valve; 7—gas Water mixing tee; 8—compressed air electric valve; 9—compressed air pipe; 10—filter cartridge lye outlet pipe; 11—alkali outlet electric valve; 12—alkali outlet pipe; 14—filter cartridge; 15—filter element ; 16—filter cartridge iron powder discharge pipe; 17—iron powder discharge electric valve; 18—iron powder discharge pipe; 19—support; 20—filter element block; 21—honeycomb; 22—flushing hole;
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The invention discloses a permanent magnetism backwashing filter for removing ultrafine iron powder in alkali lye and a method thereof. The permanent magnetism backwashing filter comprises a filter cylinder, a filter core in the filter cylinder and the permanent magnets at two sides of the filter cylinder; an air-water mixing tee joint is arranged at the central part of an end cap at the upper part of the filter cylinder, an outlet is connected with the filter core through a pipeline, a filter cylinder alkali lye inlet pipeline is welded with an intermediate part at the lower part at one side of the filter cylinder, a filter cylinder alkali lye outlet pipeline is welded at the intermediate part over the other side, a filter cylinder iron powder discharge pipeline is welded at tip of pyramid body at the bottom of the filter cylinder; the filter core is formed by multi-group honeycomb superimposed filter core blocks, a flushing aperture is arranged at the center of each honeycomb, each group of the filter core block is vertically arranged on a support in the filter cylinder, and the electrically operated valves are arranged at the inlet and the outlet pipelines. The filtering and backwashing can be controlled through sequential control of the electrically operated valve and the permanent magnet, and steps of filtering, purging, backwashing and iron powder discharge are carried out. The ultrafine iron powder in the alkali lye can be rapidly removed, cleaning effect of the alkali lye is increased, cleaning quality of the strip steel surface is increased, alkali lye consumption is reduced, and production cost is reduced.
Description
technical field [0001] The invention relates to a magnetic filtration technology, which is a permanent magnetic backwash filter and method for continuously removing ultrafine iron powder in lye during the lye cleaning process of a cold-rolled steel plate. Background technique [0002] Residues on the surface of cold-rolled strip steel will affect the surface reflectivity of the strip steel, affect the quality of the subsequent process, and affect the surface appearance quality of the finished product in the downstream process. Taking the galvanizing production process as an example, part of the solid particles remaining on the surface of the strip sticks to the furnace roll of the annealing furnace, and the other part falls into the furnace or remains on the surface of the steel plate. nodules. The nodulated furnace rolls cause imprints on the surface of the strip steel, and when the imprint is heavy, the surface of the strip steel is scratched. In addition, the solid part...
Claims
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Login to View More IPC IPC(8): B01D35/06B01D35/16
Inventor 刘宝权宋君王奎越金耀辉吴萌李志峰王军生张岩秦大伟侯永刚
Owner ANGANG STEEL CO LTD