The higher temperature and aluminum content of the A1-Zn-Si melt make the reaction between Fe and Al very intense, resulting in a large amount of Fe dissolved into the melt and forming a large amount of slag. Its main components are Fe2A15 and FeAl3. Basically different from galvanizing, they differ in the density of the slag and the melt. Some iron-zinc compounds (such as FeZnlz) are denser than zinc and sink to the bottom of the pot. Some iron-zinc compounds (such as FeZn7) have a similar density to that of zinc. They are suspended in zinc and are floating. Slag, some slag (such as Fe2A15, ZnO) than the density of zinc liquid, floating on the surface of zinc dross, is the top slag. The iron-aluminum compound slag has a higher density than the melt and is mostly deposited on the bottom of the pot or on the parts in the pot. After the iron-aluminum compound slag is formed, it is often subjected to subsidence movement with less time for floating. Therefore, the chance of colliding with each other and growing up into slag particles is much less than that of galvanizing. Slag particles are fine and do not generally fall into the steel. Slag particles formed on the belt. The biggest hazard of the iron-aluminum compound slag is that it falls on the sinking and stabilizing rollers, forming a build-up of lumps and making the steel strip imprinted. When it is severe, the leveling machine cannot be straightened, affecting the final product quality. From the nodules form on the roller, the nodule formed by galvanized steel is generally agglomerate in sheets, instead of punctate or agglomerated when galvanized, there is no sharp corner, and the imprint generated on the steel strip is also round Angled, unlike the dent on the galvanized plate, it is relatively easy to eliminate some when pulling and straightening. When the nodule is already on the roller, it can be scraped off with a slag shovel made of a heat-resistant material, which is slightly easier than galvanizing.
Dampers
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