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Galvanized Line Rolling Process
Oct 24, 2017

The surface of the cold-rolled steel strip will contain scum containing iron and iron powder, the galvanized line will enter the galvanized line, and the annealing will be carried out before the annealing furnace. First, the surface and the dross of the steel can be cleaned first and then scrubbed through the brush tank. When the strip is scrubbed, the iron powder and the alkali wash solution attached to the strip surface are scrubbed from the strip and into the sink. The steel strip needs a cooling roll surface during cold rolling, a galvanizing line and a large amount of iron powder produced during the rolling process to cool the tank with coolant. The cleaning fluid and the coolant are recycled to remove the iron powder. At present, China has long been unable to use a good professional iron removal equipment, mainly through the import of German or Japanese magnetic separator. Import equipment, high prices, high maintenance costs, spare parts spare period is long. Galvanized line I developed a high-performance low-cost counter-current iron powder magnetic separator, galvanized line actually use the magnetic separator iron removal rate of up to 98.7%, more than the German magnetic iron magnetic separator 94% iron removal effect. In addition, according to the need, by increasing the permanent magnet magnetic induction strength, and further improve the iron removal rate, the method in line with the magnetic separator high gradient development trend.

The surface of the drum is made of stainless steel, and the surface of the surface of the galvanized wire is a rounded rounded surface with a rounded surface on both sides of the drum and a cylindrical surface (cylindrical), which is advantageous in removing the iron powder adsorbed on the roll , The diameter of the roll is 1100 mm, and the roll thickness is 8 mm in view of the permeability of the roll and its own strength. A permanent magnet 6 which does not rotate with the drum is provided in the inner cavity of the drum. The magnetic force of the permanent magnet is designed to be 230 °, and the galvanizing line maximizes the iron powder in the iron powder while allowing the adsorbed iron powder to the scraper 4. The magnetic force of the permanent magnet is close to the outlet as a starting point and the inner cylinder The surface is clockwise. The increase in magnetic induction does not affect the rest of the magnetic separator, so the magnetic induction can be increased according to the increase in iron removal rate. The stronger the magnetic induction of the permanent magnet, the better the iron removal effect. The galvanizing line determines the position of the permanent magnet (the starting point of the magnetic force angle) by adjusting the water of the intake valve of the intake valve by adjusting the shaft of the roller shaft 11, and then the positioning shaft is fixed.

The roller is driven by the gear motor and driven by the drive. The drum rotates in a low speed clockwise direction, i.e., countercurrent rotation (the permanent magnet is mounted on the shaft in the drum and does not rotate with the drum). Repeated experiments, the galvanized line if the speed is too fast, the drum surface adsorption of iron powder too much water, waste collection box is about to fill, is not conducive to the subsequent separation of iron powder processing; if the drum cylinder speed is too slow, Iron speed; galvanized line, the drum speed of 1 r / min when the best effect. Galvanized wire to achieve 1 r / min roll speed, select the rated voltage 220 V, rated power 3.5 kW, the output speed of 20 r / min, reducer gear ratio of 1 /