Stage treatment type magnetic filter device

Abstract

The invention discloses a stage treatment type magnetic filter device. The device comprises a liquid storage tank which is divided into a filtrate pre-treating area and a filtrate magnetic adsorption area by a clear liquid overflow plate, wherein the top of the filtrate pre-treating area is provided with an oil baffle plate, an oil sucking pipe inserted into a liquid level oil foam layer is arranged between the oil baffle plate and a filtrate inlet; the filtrate magnetic adsorption area is provided with a slag outlet, a clear liquid outlet and a rotary magnetic roller, the upper part of the rotary magnetic roller is provided with a slag guiding trough extending to the slag outlet, and the slag guiding slot is provided with a scraper plate matched with the surface of the rotary magnetic roller. The liquid storage tank is divided into the filtrate pre-treating area and the filtrate magnetic adsorption area, the filtrate pre-treating area is used for standing and precipitating suspended residual iron particles in a standing and precipitating mode, the precipitation is discharged from the liquid storage tank, and most of oil stain on the liquid level is sucked by the oil sucking pipe, the adsorption load of the filtrate magnetic adsorption area is effectively reduced, the filtrate magnetic adsorption area is used for scraping and guiding out the magnetic particles adsorbed on the rotary magnetic roller through the scraper plate. The device is simple in structure, the fault rate of the equipment is reduced, and the maintenance cost is lowered.

Description

technical field [0001] The invention relates to the field of metallurgy, and is a separation device for removing residual oil and residual iron in cleaning water of a galvanizing line to reduce ferromagnetic substances on the surface of strip steel, in particular to a graded treatment type magnetic filter device. Background technique [0002] Cold-rolled strip steel needs to use emulsified oil during the rolling process. On the one hand, it is used to lubricate the rolls, and on the other hand, it is used to take away a large amount of deformation heat generated during rolling. Due to rolling slippage, a large amount of ferrous substances (iron or its oxides) on the surface of the strip are mixed with emulsified oil, and the surface of the cold-rolled strip needs to be washed before galvanizing , to remove the residual emulsified oil and ferrous substances on the surface of the strip, so there will be a lot of residual oil and residual iron in the cleaning water. If the res...

AI Technical Summary

Problems solved by technology

However, the best removal effect cannot be achieved only through the above means. Except for a small part of the ferromagnetic substances in the liquid to be treated passively precipitated, most of the suspended ferromagnetic substances need to be adsorbed and scraped off by means of a magnetic chain device, which increases the magnetic flux. Adsorption load of the chain

Moreover, because the residual oil in the cleaning water is not completely eliminated after being neutralized by the lye, due to the bonding effect of oil and iron, it is difficult for the scraper to scrape off the ferrous material on the surface of the magnetic rod, and the scraping operation is carried out for a long time. , Excessive adsorption of residual iron causes severe scraper wear, poor scraping effect, frequent replacement is required, and increased maintenance and repair costs

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