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Galvanized Line Development Trends
Oct 10, 2017

When rolling steel strip surface will be sticky oil and contain iron powder dross, in the galvanized line and continuous annealing line before the annealing furnace to wash the surface of the steel strip before the oil and dross, and then after scrubbing trough scrub. When the steel belt is brushed, Galvanized line the iron powder and alkali wash solution attached to the surface of the steel strip is removed from the steel strip and into the scrubbing groove. The steel strip should be cooled on the roll surface during cold rolling, and a large amount of iron powder produced during the rolling process will flow back to the circulation tank. Galvanized line The iron powder must be removed to recycle the cleaning fluid and coolant. At present, there is no long time to use and the use of good results in the professional iron equipment, mainly by importing German or Japanese magnetic separator. But the import equipment price is high, the maintenance expense is also very high, and the spare parts preparation cycle is long. The author has developed a kind of high performance low-cost countercurrent type iron powder magnetic separator, Galvanized line which is used in practice, the iron removal rate of the magnetic separator is as high as 98.7%, exceeding the iron removal effect of 94% of the German magnet type iron powder magnetic separator. In addition, according to the use of the need to improve the magnetic induction of the permanent magnet to further improve the iron removal rate, this method is in line with the magnetic separator to the high gradient direction of development trend.

The surface of the roller is a smooth round surface, the ends of the rollers and the surface of the roller cylinder (cylindrical), the structure is conducive to scraping the scraper scraping the drum on the adsorption of iron powder, roller diameter of 1 $number mm, considering the roller barrel of magnetic and its own strength, roller thickness of 8 mm. In the inner cavity of the roller cylinder, Galvanized line the permanent magnet body which is not rotated with the roller is 6, and the magnetic angle of the permanent magnet is designed as 230°, which can not only adsorb the iron powder in the fluid, but also carry the adsorbed iron powder to the scraper 4. The magnetic angle of the permanent magnet is close to the outlet as the starting point, and the clockwise direction is filled with the inner cylindrical surface of the roller. The increase of magnetic induction will not affect the other parts of the separator, so the magnetic induction can be based on the increase in iron removal rate, Galvanized line the stronger the magnetic induction of permanent magnet, the better the effect of iron removal. The position of the permanent magnet (the starting point of the magnetic angle) is determined by adjusting the axle head of the roller shaft 11, so that the backflow water of the sample valve is the least iron powder, Galvanized line and then the position of the shaft head is fastened.

The roller is driven by the gear motor through the reducer, Galvanized line the transmission takes over, the roller rotates clockwise and low-speed rotation in the roller shaft (the permanent magnet is installed on the shaft of the roller, and does not rotate with the roller). Galvanized line It has been proved by many experiments that if the rotational speed is too fast, the amount of water contained in the iron powder adsorbed on the roller surface is too high, the waste collection bins will soon fill up, which is not conducive to the subsequent treatment of the separation of iron powder; If the roller rotational speed is too slow, Galvanized line the iron removal rate of the magnetic separator decreases, and when the drum speed is 1 min, the effect is best. In order to achieve 1 min roller speed, select the rated voltage $number V, rated Power 3.5 KW, output speed min gear motor and drive ratio of 1/20 reducer.