Kocks to Supply RSB for new Henan Jiyuan Bar Mill
08/13/2007 - Friedrich Kocks GmbH will supply a 3-roll, heavy-duty reducing and sizing block for Henan Jiyuan Iron & Steel’s new 600,000 tonne/year SBQ bar mill.
Henan Jiyuan Iron & Steel (Group) Co., Ltd. [JYGT], Jiyuan, P.R. China, will expand their production facilities with a new 600,000 tonne/year special bar quality (SBQ) bar mill. The addition will increase their annual rolled-products capacity to more than three million tonnes.
Friedrich Kocks GmbH & Co. KG, Germany, will supply a 3-roll "Heavy Duty" Reducing & Sizing Block [RSB] for the new SBQ mill. The scope of supply comprises design, supply, installation, and commissioning of the 4-stand RSB 370++ including associated equipment.
The 3-roll "Heavy Duty" RSB will be installed in the new bar mill as the finishing block, where it will roll finished bars in the range from 14- to 42-mm diameter in coils, as well as bars from 20- to 90-mm diameters in straight lengths onto the cooling bed. The RSB will significantly reduce the required number of pre-sections in the upstream mill, and thus enables operation of the complete mill with a one-pass family. Layout and design of the block, including the respective pass design, facilitate thermomechanical rolling, a state-of-the-art bar mill technology.
An extended "free-size" range of up to ± 1.5 mm from the nominal size allows rolling of a variety of sizes with the tightest tolerances by adjusting the stands and guides via remote control. The optimum adjusting values for motor speed, rolls and guides as well as the gear steps for the desired final product are calculated by the bar mill configuration system (BAMICON). The automatic adjustment, which is made during a billet gap, is completed within a maximum of one minute. When finished dimensions exceed the "free-size" range, a quick stand-changing system changes the stands in less than five minutes, so that any size can be rolled using a minimum number of roll sets and stand changes without need for complete mill availability.
Start-up of the new Kocks 3-roll Reducing & Sizing Block in "Heavy Duty" design is scheduled for the second half of 2008.
Formerly a state-owned company, Henan Jiyuan Iron & Steel was founded in 1958 and today counts some 5000 employees. In 2000, it became the first Chinese enterprise of the iron and steel industry to pass into private hands.
