The operation of an EAF is a batch process in which steel scrap, pig iron, a source of iron oxide such as roll scale or iron ore, and limestone or burnt lime are charged into the furnace. The roof is closed over the furnace and electrodes are lowered until arcs are established between them and the metallic charge. The heat generated by the arc and the heat developed from the resistance to the flow of current in the metal melts the charge. When the heat (meaning the metal in the furnace) is finished, the furnace is tilted and poured into a tap ladle through a tap hole or spout in the furnace side wall. After each heat, repairs to the bottom and slag line are made by shoveling in a refractory bottom patching material.

With Steiner''s Model GN10KW Generator attachment, a Steiner tractor can generate 10,000 watts of electricity for uninterrupted operation of electrical power tools, appliances and equipment. At 10,000 watts, the generator has enough power to run six 2-hp. electric motors, 16 5.5-amp. power tools or 160 60-watt light bulbs. Both 110- and 220-volt outlets are provided. To use the full 10,000-watt output, several outlets must be used. The GN10KW mounts easily to the front hitch of Steiner tractors and is belt driven from the tractor''s front PTO. Other features include a voltmeter, a dual ball bearing rotor, a safety shut-off switch and a platform. The generator is also backed by a 90-day warranty. Onan generator sets come in models offering 2.8 to 40 kw. power. Feature reconnectable voltages of 50 or 60 Hz. Choose from diesel, gas, hydraulic, power take off (PTO), and alternative fuel-driven styles. Ideal for police, fire, and rescue vehicles, as well as for aerial lift bucket trucks, mobile offices, and construction site trailers. The popularity of the TV series Emergency boosted the recognition of rescue trucks. The show was about two Los Angeles County Fire Department paramedics and the staff of Rampart General Hospital''s emergency department. Each episode centered on a disaster or medical emergencies. It took viewers from the genesis of the paramedic program in early 1972 and showed their truck, Squad 51, a small rescue, in action during earthquakes, auto accidents, airplane crashes and fire fights.

* Basic brick is a general term used to designate a brick that is made from magnesia. A basic brick has high resistance to thermal spalling and excellent mechanical strength.Brick Installation--There are so many things to know when installing brick that entire books are needed to cover the many things pertinent to the task. It is not the intent of this article to rewrite those books, but rather to indicate some of the main points for proper installation. The most important of these are mortar and temperature.

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