Document 2JZnOrd8DD6vY4d1yrYNN8YdN

FANSTEEL METALLURGICAL CORPORATION BOASTS COUNTRY'S LARGEST REFRACTORY METAL ROLLING MILL [) y C. P. Field Engineer, Elliott Company, Chicago A program for increased capacity of tanta relays with almost 5000 contacts. Fansteel is lum, tungsten, and molybdenum was one of the country's leading manufacturers of initiated in late 1950 by Fansteel Metallurgical electrical contacts as well as selenium rectifiers Corporation, North Chicago, Illinois, to meet which were used to supply 230-volt direct the never-ending demands of these refractory current required for control purposes. metals. In 1953 a rolling mill was completed, The Elliott 600-hp main drive motor can the last of an equipment installation project be operated at four speeds, forward or reverse enabling an increase in manufacture of tungs --450, 600, 900, or 1200 rpin, which corre ten by about 75 percent and molybdenum by spond to 132, 176, 264, and 364 fpm at the about 100 percent. This mill is the largest yet mill. Pushbutton control is also provided for built for this service in the United States. jogging or inching. Control is electrically inter Fansteel Metallurgical Corporation and its locked so that the mill does not start until oil subsidiaries, Tantalum Defense Corporation, pumps are running and oil pressure normal. Vascoloy-Rainet Corporation, and YV. \V. An automatic preset, screwdown control Alloys, Inc., have a combined plant area of enables the operator to preset the cam limit more than 650,000 sq ft. Its six divisions arc switches and automatically make 15 passes engaged in manufacturing and developing through the mill to the desired thickness. This tungsten, molybdenum, tantalum, coiumbi- feature has resulted in sulistantial savings in um, metal carbides, coppcr-)>asc alloys, and scrap, in time, and in rolling costs. aluminum bronze, just to mention a few Other Elliott auxiliary equipment was sup products. The corporations growth has Ix'cn plied by our Crockcr-YVheeler Division and rapid and its product quality high. consisted of two 15-hp, high-torque, high-slip, The new 26-in. by 36-in. rolling mill was screwdown motors; one 10-hp hydraulic roll engineered and built by United Engineering balance system and roll change motor; one Si Foundry Company, Pittsburgh, Penn 5-hp main drive, lube-system motor; and sylvania. Our own engineers from the In one lf6-hp screwdown, lube-system motor. dustry Engineering Department coordinated All auxiliary motors arc of the Sealedpower the electrical system with United's engineers. TEFC ribbed-frame design, much used by Control for the project was supplied by Clark steel mills throughout the country during the Controller Company and included about 100 last fifteen years. Closeup of the Elliott 600-hp main drive motor. The motor is afour-speed, constant horsepower, two-winding, consequent pole squirrel-cage induction motor which de velops not less than 250 percent pullout torque at all jour speeds. It is equipped with a zero-speed plugging switch so that the motor can be plugged to stop in emer gencies. It is of heavy-duty mill-type con struction, designed to withstand sudden shocks and heavy overloads. Motor at right is the 5-hp main lube system drive motor.