EoW September 2010

technology news

Taihan Electric to replace copper rod mill

The PDH lubrication system is used in the most demanding drawing applications, allowing the highest drawing speeds, with all carbon steel rods/wires, mechanically descaled or acid cleaned, bare or pre-coated, bright or galvanized, including spring, high-tensile rope, PC strand, stainless steel spring, galvanised H/C and L/C wire, plating wire and CO 2 welding wire. The PDH system uses a unique multi-way interaction of lubricant pressure, temperature and viscosity to convert a solid lubricant into a liquefied solution and maintain its thermal stability at all drawing speeds, eliminating conventional wet pre-coatings for all drawing applications form rod, including mechanically descaled 0.90%C rod drawn without pre-coating chemicals. The system is highly regarded for its unique ability to provide closed circuit pressure lubrication at 350 bars, controlled lubricant injection at wire speed of 22 m/s and lubricant thermal stability at 240°C. The PDH system performs a high-performance wire rod dry coating with completely fused lubricant deposited instantaneously, in 5 to 10 micro seconds, operating at zero energy consumption, performing a high-density strongly adherent hard anti-friction (anti-wear) multi-layer coat with adjustable coating weight up to 8–10g/m 2 , at will, completely eliminating the need for phosphate and borax wet pre-coating chemicals. A typical application consists in drawing 5.5mm 0.83/0.88% C, mechanically descaled rod, without wet pre-coating, with an output of 2.2 tonne/hour and a die life of 200 tonnes/die in the first draft and 40 to 60 tonnes of wire drawn in last draft, with superior surface quality and improved wire ductility. Decalub – France Fax : +33 1 6020 2021 Email : info@decalub.com Website : www.decalub.com Wire lubrication by GP/PDH system ▲ ▲ Siemens VAI Metals Technologies has received an order from the Southwire Company, USA to supply a copper rod rolling mill and the associated coil handling system. The end customer is Taihan Electric Wire Co Ltd of Seoul, Korea. The new mill will replace the existing 30-year-old system in Anyang, originally built by Morgan Construction Company, a Siemens VAI business, as a subcontractor to Southwire. The new mill will be delivered by the end of 2010. In 1955, the Taihan Electric Wire Co became the first wire and cable manufacturer to be established in Korea. Taihan is the leading domestic cable manufacturer and a major supplier of power transmission cables to the Asian market. Southwire Company is constructing a completely new production line for Taihan Electric, including melting and casting plants with a production output of 40 tonnes of copper rod per hour, in diameters ranging from 8mm to 25mm. Siemens VAI is responsible for the engineering, manufacturing and commissioning of all the equipment for the rolling mill. This includes a roughing mill with one 18 " , one 16 " and two 12 " stands, as well as a finishing mill comprising eight 8 " stands. The rolling mill is completed by a pickling line, two pinch rolls, a rollerised downturn, coiler and conveyor. Siemens AG – Germany Website : www.siemens.com/metals Wire friction, wear and lubrication Advertorial on behalf of Decalub

45

EuroWire – September 2010