Continuous Galvanizing Line 1.0~1.5mm*650mm 100,000TPY ( steel
metal)
The process comprises a number of technically-advanced intermediate
stages, e.g. degreasing, pickling and rinsing, which result in the
achievement of a clean surface, ready to be immersed in a zinc
bath. The final product of the HDG process is a multi-layered
protective coat. Its innermost layer, the so-called Gamma layer, is
formed by Fe and Zn compounds, where iron makes for 25%. The
thickness of this layer is approx. 1 μm. Going towards the surface,
the second layer, Delta, contains up to 10% of iron. The iron
content in the third subsequent layer, Zeta, is even smaller. At
the surface, the external coat of steel is nearly completely
composed of pure zinc.
The minimum required thickness of zinc coating is worked out on the
basis of the following data:
thickness of the steel item to be galvanized,
time of immersion in the zinc bath,
silicon and phosphorus content in the steel.
A properly applied zinc coat should hold for 10 to 100 years,
depending on its thickness and the influence of mechanical erosion
and aggressive environments.
Hot-dip galvanization is a cost-effective and environmentally
friendly method of corrosion protection of steel, which provides
high performance anticorrosive coats that are pleasing to the eye.
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".
Research & Development Objective of " JJRS-Sendzimir"
Genuine heat regenerative non-oxidation heating
Waste heat "extreme recycling"
No end in energy conservation and environmental protection
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.
Technical Data of continuous hot dip galvanizing line(CGL):
| | |
| b) Type | Coil-to-Coil | Coil-to-Coil |
| c) Raw Material | Coil rolled low carbon steel (full hard & annealed) |
| d) Coil Thickness (mm) | 0.17 ~ 0.8 | 0.17 ~ 0.8 |
| e) Coil Width (mm) | 762 ~ 1000 | 762 ~ 1250 |
| f) Coil I.D(mm) | Ø508 | Ø508 |
| g) Coil Weight (Ton) | 20 | 20 |
| h) Production Capacity (Ton/hr) | 4.0 | 9.0 |
| i) Zink Coating Weight (g/m2) | 183 | 183 |
| j) Line Speed (m/min) | 50 | 100 |
