Bethlehem Steel

About: Bethlehem Steel is a based out in . It is known for research contribution in the topics: Coating & Corrosion. The organization has 1529 authors who have published 1559 publications receiving 19098 citations. The organization is also known as: Bethlehem Steel Corporation.

One-spot car coke quenching method

Abstract: A process for quenching hot coke in a one-spot coke quench car. The process utilizes a unique arrangement of pipes and spray nozzles to quench the hot coke in a substantially watertight coke quench car having a sloping bottom. A plurality of pipes are directed downwardly from a header mounted on the bench side of the quench car to provide solid streams of water onto the shallow coke bed portion at the top of the sloped bottom for a portion of the quench period. After an initial period a flow of water from a plurality of spray nozzles mounted on additional headers is directed onto the substantially horizontal deep coke bed portion for the remainder of the quenching period. The unvaporized quench liquid is retained in the watertight car until the completion of the quench cycle when it is rapidly drained away.

Metal recovery method and system for electroplating wastes

Abstract: The present invention relates to a method of completely recovering nickel and zinc metal from multiple plating process waste streams by first separating the waste streams into a clean, relatively constant flow and/or concentration fraction and a dirty, variable flow and/or concentration fraction. Metal is recovered from the clean fraction by ion-exchange so as to concentrate the extracted metals for direct return to the plating bath. The effluent from the ion-exchange step is then blended with the dirty, variable flow and concentration fraction. This blended flow is first neutralized and then precipitated in a two-stage process using a sodium hydroxide solution. The resultant slurry containing the metal precipitate is filtered to yield a filter cake containing recovered nickel and zinc. This filter cake can then be further processed to recover the metal for reintroduction into the plating bath or for other uses.

Method and apparatus for determining coil sheet length

Abstract: Sheet material in a rolling mill passes over a measuring roll on its way to a coiler and causes the production of length measuring pulses at the roll and coil wrap pulses at the coiler. Sometimes slipping occurs between the moving sheet and measuring roll, thus causing variable errors in length measurements. A digital computer first stores predetermined constants and all pulse data until the tail end of the sheet is detected, then performs a regression analysis on the pulse data to compensate for measurement errors, and subsequently integrates the corrected data to obtain a highly accurate coil sheet length calculation. The computer also corrects the coil sheet length calculation for additional errors caused by a partial last wrap on large diameter coils, as well as for any significant differences in sheet thickness from a nominal value.

Method of treating ferrous strand for coating with aluminum-zinc alloys

Abstract: This invention relates to a method of hot-dip coating a ferrous strand. The strand is passed through a furnace in which the strand is heated, passed through a second furnace in which the strand is subjected to a reducing atmosphere and then passed through a protective hood and into the molten bath of aluminum-zinc alloy. A preheated reducing gas is introduced into the protective hood so as to sweep across and cover the surface of the molten bath within such hood prior to passing upwardly through it and the second furnace countercurrent to the movement of the strand. The preheated reducing gas has a temperature of at least 750° F, a dew point no greater then 0° F and is composed of at least 20% by volume of hydrogen, balance essentially nitrogen.

A comparison of the resistance spot weldability of bare, hot-dipped, galvannealed, and electrogalvanized DQSK sheet steels

Abstract: The spot weldability of various zinc-coated sheet steels was examined using several procedures and criteria