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

Hot dip galvanizing galvanizing Line 1.5mm~3.0mm*750mm 150,000TPY ( steel metal)

JJRS assembles excellent technology research team, high qualified management personnel, perfect management system and powerful engineering design and complete project capability. As an integrated solution provider, we are willing to provide iron and steel enterprises of all over the world with highest quality products and services, from general engineering contracting, integrated production lines, to single equipment, even components and spare parts.

JJRS owns a stable user group both at home and abroad; all the contracted engineering projects are highly praised by end users bringing us fruitful success and good reputation. We are promoting actively metallurgical equipments to international market, establishing good trade cooperation relationship with several multinational companies. Our products are exported to Indonesia, Uzbekistan, Russia, Southeast Asia, Middle Asia and other countries and regions.

Consolidating the advantages of the traditional technology " Improved Sendzimir" and "United States Steel Corp", and integrating the independently researched and developed regenerative nozzle and waste heat efficient recycling technology, the technology R&D team of Beijing JJRS Technology Development Co.,Ltd, launched a new generation of steel strip continuous annealing hot dip galvanizing process contrl technology based its latest self-designed process control technology by in-depth study and analysis, which is named as " JJRS-Sendzimir".

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.

Hot-dip galvanizing is essentially a process that coats steel with a protective layer of zinc alloy to protect it from corrosion. Not only is it a relatively simple and cost-effective process, but the resulting benefits will last for decades. Let’s take a look at the galvanizing process from start to finish.

The Process
Preparation
First and foremost, the steel itself must be thoroughly inspected to ensure that drainage and venting requirements are met. It wouldn’t do to have a flawed product at the outset.

Cleaning the Steel Prior to Hot-Dip Galvanizing
Before the galvanizing process can begin, the steel must be cleaned as thoroughly as possible. This isn’t just for appearances. The zinc coating simply can’t bond with a steel surface if foreign materials are present. There are several steps to cleaning:

The steel is submerged into a caustic tank at 180° F to remove any paint residue. It is then rinsed in a freshwater tank at ambient temperature to remove the caustic material.
The steel is pickled by being dipped into a tank of heated sulfuric acid at 140°-145° F to remove any mill scale. Afterward, it is again rinsed in a freshwater tank.
Lastly, the steel is washed in a flux tank containing a mixture of zinc chloride and ammonium chloride at 140°-170° F to provide protection against oxidation before galvanizing.
After these steps have been completed, the steel is ready to receive its new protective coating.