Today, hot-dip galvanized steel pipes are a common type of fire protection pipes, playing an irreplaceable role in the fire safety industry. Why can't hot-dip galvanized pipes be replaced by cheaper welded pipes or cold galvanized pipes? Hot-dip galvanizing was invented in the mid-18th century and developed from hot electrolytic tin plating processing technology. Up to this day, hot-dip galvanizing remains one of the most widely used and effective processing technologies for steel corrosion resistance.
Operators at the control console should manually adjust the speed based on the operation of equipment before the furnace and hand gestures to prevent pipe jamming.
Tools used by furnace operators should be preheated before use to prevent zinc splashing and injuring people; regularly check for any steel pipes falling into the pot and remove them promptly if found; adjust the equipment in time to prevent pipe jamming and ensure equipment safety.
When adding zinc ingots to the zinc pot, they should be preheated first. Adding zinc in bundles is strictly prohibited. Add no more than five zinc ingots each time, and slide them down the wall of the zinc pot longitudinally to avoid impact damage to the pot and splashing of large amounts of zinc that could injure people. Iron substances are strictly prohibited from falling into the zinc liquid to prevent the generation of a large amount of zinc dross.
When melting zinc, heat it slowly and avoid rapid heating, as it may damage the lifespan of the galvanizing pot and cause a large amount of zinc vapor to evaporate. Inhaling excessive amounts of this harmful gas can lead to a condition called "metal fume fever." During the zinc melting process, once the zinc reaches a high temperature, never use your hands to move the zinc blocks to avoid burns; use appropriate tools instead.
Regularly remove the zinc ash from the surface of the zinc liquid. When scraping, gently scrape the surface of the zinc liquid with a scraping board without stirring too vigorously to prevent the zinc ash from rising. The scraping board should not touch the steel pipes being galvanized or exiting the pot to avoid accidents or equipment malfunctions.
Zinc blocks, zinc fragments, zinc brought out during galvanizing, and zinc flowing out of steel pipes on the ground before the furnace should be recovered and returned to the pot at any time to reduce heat loss from the zinc pot.
When adding aluminum ingots to the surface of the zinc liquid, make sure to move them back and forth several times to ensure uniform aluminum content on the surface of the zinc liquid.
To facilitate slag removal and zinc extraction, 20 tons of lead should be added to the zinc pot.
Preheat the slag extractor before use. Store zinc slag in different sizes. The temperature for slag extraction should be controlled above 455°C. Use special tools when operating the slag extractor and stand with your feet in a "T" position, one meter away from the zinc pot.
The hot-dip galvanizing process requires strict control. Therefore, during hot-dip galvanizing production, it is necessary to maximize work efficiency. In other words, the more pieces or tons produced per unit time, the lower the cost, and vice versa.
