Hot Dip Galvanizing (Aluminizing) Technology --- JJRS-Sendzimir

Galvanizing Line (Hot dip) 0.8mm~2.0mm*750mm 250,000TPY ( steel metal)

The Hot-Dip Galvanizing Kettle
The freshly cleaned steel is submerged into a kettle of molten zinc at 830°-850° F. The zinc then bonds with the steel in a diffusion reaction, creating a brand-new layer of metallurgically bonded zinc alloy. Before the newly coated steel can be removed from the tank, the surface of the molten zinc must be swept to remove any residue to ensure that the steel is exiting through pure zinc.

Cooling Down
As soon as it’s removed from the galvanizing kettle, the steel is quenched in aqueous sodium dichromate at ambient temperature to help cool it down before the final cleaning process. This also helps the galvanized steel retain its shiny surface for a longer period of time.

Final Cleaning
Once galvanized, the coated surface of the steel is cleaned of any dirt, drip marks or excess zinc to ensure the final product is ready for testing.

Testing Hot-Dip Galvanizing Results
The steel is then moved outside and placed on poles for millage tests. These tests verify that the process was successful and that the zinc coating is the proper thickness. Different applications for the steel can call for different coating thicknesses.

Other Key Considerations for Hot-Dip Galvanizing
Protection Against Rust via Hot-Dip Galvanizing
The main purpose of hot-dip galvanizing steel is to protect it against rust, the natural predator of steel. One of the main benefits of the zinc alloy coating, other than generally being very resistant to abrasion, is that zinc and rust are inherent enemies. Rust simply can’t eat through zinc, so it follows that it can’t eat the steel beneath the zinc. either.

Two Core of " JJRS-Sendzimir"

Compared with the traditional technology, " JJRS-Sendzimir" method can greatly increase productivity. For its:

• High temperature flame on-time heating technology: In the heating furnace, steel strips from the normal temperature of 20 C can be heated directly to the re-crystallization temperature zone of strip steel in the non-oxidation atmosphere.
• Zero heat preservation and energy saving concept: On the premise of guaranteeing the annealing and restoration effects, heat energy can be reasonably allocated, steel strip heating is conducted as far as possible in the flame heating section of high thermal efficiency to shorten the length of reduction section, so as to improve productivity as much as possible and reduce the manufacturing and operation cost of spare parts.

Technology Patent of " JJRS-Sendzimir"

The launch of " JJRS-Sendzimir" depends on a number of technology patents innovated by ourselves.

• No-oxidation nozzle burner tehnology
• Steel strip constant pressure thermal treatment furnace
• Nozzle arrangement mode (Flame gas orientation heating technology)
• Hot dip galvanizing technology
• Regenerative no-oxidation patent technology
• Low thermal value gas (Blast furnace gas) radiant tube furnace
• Energy saving radiant tube patent technology
• Process heat recovery patent technology
• Energy saving furnace roller
• Software copyright: galvanized steel strip line control software