New Generation Steel Strip Continuous Annealing

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

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".

The plant consists of several furnaces in line, which operate independently with a common charging system. The Single-Coil Lifting Hearth Furnaces SCL are loaded by the charging machine, which moves under the furnaces. From a central charging and discharging station the charging machine takes the coil and transfers it to the individual chamber. Each furnace unit is loaded with one coil only.

The furnace system is working with electric or natural gas heating. With fuel heating the burners are installed in δ-tubes, which allow indirect heating of the furnace atmosphere. The recuperative burners are equipped with heat exchangers for heating the incoming combustion air by the outgoing flue gas.

The furnaces are gas tight for processing the strips in inert gas atmosphere. For complete burning of adhering rolling oil, which evaporates during heating up the strip, the furnace line can be equipped with a thermal oxidizer.

With Single-Coil annealing there is no need for complex batch assembly, considering coils of the same size, alloy composition and annealing program.

For bigger batches of similar coils, the Multi-Coil Annealing Line MCL is the right choice. Here the furnaces are loaded with a batch of the same coils.

Specific benefits of SCL:

Individual short heating-up and cooling time
No overheating of coil edges
Less space requirement
Individual annealing of a single coil
In time annealing
Integrated fully automatic charging
Automatic connection to warehouse system
Individual recording of the processing
Extendable line arrangement
High availability
Indirect gas firing or electric heating system
Specific benefits of MCL, besides the above mentioned:

Treatment of large batches
Homogeneous annealing temperature
Extendable line arrangement
Indirect gas firing or electric heating system

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