Galvanizing (Galvanizing) is also called hot -soaked zinc and hot -dip galvanizing: It is an effective metal anticorrosive method, which is mainly used for metal structure facilities in various industries. It is the zinc -removing steel parts that are removing rust removal into the melted zinc liquid of about 500 ° C to enable the surface of the steel component to attach the zinc layer to play a purpose of anticorrosion. Hot-dip galvanized process process: finished pickled-water washing-adding aid-drying-drying-hanging-cooling-medicinal-cleaning-polishing-hot-dip galvanized. Hot -dip galvanizing is developed from the older heat -plated method. Since France applied to the industry in 1836, it has a history of more than 170 years. In the past three decades, with the rapid development of cold -rolled steel, the hot -dip galvanized industry has developed on a large scale.
The hot -dip galvanized steel pipe uses the mechanical principles of all -immersive semi -automatic semi -automatic galvanization method to complete, suppress, spiral, pull out, and improve the heat galvanized process.
1. Process parameters control: Zinc fluid temperature should be controlled between 440-460 ° C; zinc dipping time should be controlled between 30-60 seconds; the amount of aluminum liquid surface (zinc liquid surface is 0.01-0.02%)
2. The use of zinc ingots should be the national standard ZN0-3 zinc ingot.
3. We must always maintain and control the reliable performance of the spiral of the downward pressure, the unplug the improvement of the improvement device, strengthen the lubrication of the cylinder, adjust the height and angle of the galvanized pipe assignor, and adjust the equipment to the best state.
4. The positioning of the switch should be accurate; the thermal power puppet and the table should be used uniformly. Otherwise, the temperature error will be large, and the protective sleeve of the thermocouple should be checked and replaced frequently.
5. The operator of the operating table shall be manually adjusted to prevent the stuck pipeline according to the operation of the equipment in front of the furnace and the gesture command.
6. Pre -warm -up before use tools before furnace to prevent zinc splash from hurting people; frequently check whether the steel pipe is dropped into the pot, and it should be cleared in time; adjust the device in time Safety.
7. When adding zinc to the zinc pot, preheat zinc ingots first. When adding zinc, a bundle of zinc is never allowed. The zinc is not as many as five pieces each time. Slowly plan, so as not to impact the damage to the zinc pot and splash a large amount of zinc injury; the iron material is strictly prohibited from falling in in the zinc solution to prevent a large amount of zinc residue.
8. When fusion zinc, it should be heated slowly. Do not burn the fire, otherwise there will be a life of a galvanized pot, and a large amount of zinc steam will volatilize. After this harmful gas is inhaled by the human body, it will suffer from a "casting fever" condition. In the process of melting zinc, once zinc has a higher temperature, you must not use your hand to mobilize zinc blocks to avoid burns. Appropriate tools should be used to mobilize it.
9. Clear zinc ash on the surface of the zinc liquid regularly. When scraping the ash, you should gently scrape the ash surface on the surface of the zinc liquid. You should not be stirred too much, so as to avoid the zinc ash raised. There is a personal accident or equipment accident.
10. Zinc blocks, crushed zinc, zinc, and steel pipes flowing from the ground in front of the furnace, zinc, and steel pipes flowing to the outside should be recovered at any time to reduce the heat loss of the zinc pot.
11. When adding aluminum ingots on the surface of the zinc liquid, it is necessary to ensure that the aluminum content of the zinc liquid surface is uniform.
12. In order to facilitate the residue and zinc pump, 20 tons of lead should be placed inside the zinc pot.
13. When fishing, the residue machine should be pre -heated first. The zinc residue should be stored in size. The temperature of the residue should be controlled above 455 ° C. When swinging the residue scratch machine, you must use a special tool to leave the zinc pot. The feet should be stood into a diced shape.
14. The heat -dip galvanized process is relatively strict. Therefore, in the process of hot -dip galvanized production, it is necessary to do a workshop, which means that the more roots or tonnage in the unit time, the lower the cost, and the higher the cost, the higher the cost.
