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CONSTRUCTION: Bethlehem Steel Corp., Singapore,1975, Rebuilt, 1982; Modernized 1985.PERFORMANCE: Water depth--250''; drillpressmadeingermany Drilling depth--25,000''.QUARTERS: 74 persons, plus 3-man sick bay.HULL: 166'' x 132'' x 16''.HELIPORT: 83'' x 83''.STORAGE: Mud & Cmt drillpressmadeingermany Bulk--6,030 cf; Sackstorage--3,000 sks; Liquid Mud--1,800 bbl;Fuel--l,719 drillpressmadeingermany bbl; Water for Drilling 5,575 bbl; Potable Water--474bbl.DRILLING EQUIPMENT: Drawworks--Nat''l 1625DE, three 800 hp motors; Pumps--two Nat''l 12-P-160triplex, 1,600 hp; Prime movers--two EMD Though light in weight, Airbor magnetic drill has a powerful 1.6-hp air motor and 1,600-lb magnetic holding strength. With its extra rack, stroke length is extended to 10 1/4 in. Annular cutter capacity is up to 2 1/16 in. diam. Geared chuck adapter converts the unit to a standard drill press. The Slugger Air Force pneumatic drill, at 24 lbs, 6 1/4" high, is useful for confined area drilling. The drill''s features include a permanent magnet that turns on or off by air power, a cutter capacity of up to 1 1/16" diameter x 3/4" depth and the ability to use ShortSlugger cutters and frame cutters. These cutters'' geometry allows the operator to drill multi-layered truck frames in a single pass. Although this article started with a general overview of the iron and steel industry, we will refer only to one process for the rest of this feature, a gray iron foundry using an electric arc furnace. We will see how important brick and refractory are and why everyone should pay attention to their brick and refractory designs and installations.History and Background of the Electric Arc FurnaceThe electric arc furnace (EAF) has been around since the early 1900s and is primarily used to produce high quality alloy steels. EAFs have refractory-lined steel shells and vary ill size from only a few feet in diameter to twenty feet or more. The bottom, or hearth, of the furnace is dished to hold the metal charge. The vertical side walls include one or more doors and a tapping spout for removing the melted charge. The roof over the furnace is dome-shaped, and incorporates two or three openings near its center for the admission of electrodes into the furnace. The roof is usually detachable and is lifted off or turned aside for charging. The whole furnace structure is tilted forward and backward for slag skimming or tapping. The furnace capacity will depend upon the size of the furnace and can be less then one ton per charge to up drillpressmadeingermany and drillpressmadeingermany to eighty-five tons per charge.
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