Crosco Ltd.LABINRIG DESIGN: Levingston III-CCONSTRUCTION: Viktor Lenac, Rijeka, Croatia, 1985.PERFORMANCE: Water depth--300''; Drilling depth--20,000''.QUARTERS: 75 persons.VARIABLE LOAD: 1,500 mt.HULL: 200''x 186'' x 23''.HELIPORT: Sikorsky S-61, MI-8.STORAGE: Mud & Cmt Bulk--6,300 cf; LiquidMud--1,263 bbl; Fuel--4,500 bbl; Water forDrilling--5,562 bbl; Potable Water--755 bbl.DRILLING EQUIPMENT: Drawworks--Nat''l 1320UE; Pumps--two Nat''l 12P-160, 1,600 hp; Primemovers--three Pielstick Diesel drillpresses 16PA, one Pielstick Although this article started with a general overview of the iron and steel industry, we drillpresses will refer only to one process for the rest of this drillpresses 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 drillpresses 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 drillpresses 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, drillpresses 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 drillpresses 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 to eighty-five tons per charge.
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