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.

Apparatus for storing and dropping expendable BOF sensors

Abstract: A sensor dropper for storing, shielding and dropping sensors into a BOF vessel. The sensor dropper includes a support frame to move the stored sensors toward or away from a sensor drop path leading into said BOF vessel, a dropper assembly supported on the support frame for storing and releasing sensors into the sensor drop path to the BOF, and a shield gate to protect the sensor dropper and stored sensors from BOF fume. The dropper assembly includes a plurality of storage and release mechanisms and corresponding shear mechanisms. Each storage and release mechanism includes a threaded sensor support shaft from which a stored sensor is suspended and dropped into the sensor drop path when the threads of the sensor support shaft are rotated in an outward direction, and each shear mechanism includes a shear blade housed within a tubular cutter having outer shear blades to sever an electrical sensor cable when the inner shear blade is rotated past the outer shear blades. The shield gate is rotatably mounted at a location along the sensor drop path between the dropper assembly and includes a counterweight to hold shield gate in a closed position. The counterweight is balanced to allow the shield gate to rotate to an open position upon impact from a dropped sensor and return to the closed position after the dropped sensor falls from the shield gate into the BOF vessel.

Metallic abrasive produced from a steel mill waste material

Abstract: A method for preparing a steel mill waste material comprised of inner metallic cores encased in outer shells of iron oxides for use as size-graded metallic abrasives and the product so produced are described. The waste material is screened to simultaneously separate it from all the foreign matter collected therewith and also to separate it into a fraction containing particles larger than about 6.35 mm and a fraction containing particles smaller than about 6.35 mm. The fraction containing the particles larger is recycled in the steel mill. The fraction containing the smaller particles is charged into a grinding mill containing appropriate grinding media. The smaller fraction remains in the mill for a time so that the outer shells are broken into small pieces substantially all of which are removed from the surfaces of the inner cores. The pieces of the shells and the metallic cores are separated from each other by screening. The metallic cores are graded into a plurality of sizes by screening. The pieces of shells are recycled in the plant. The metallic cores have a microstructure of untempered lath-like martensite substantially free from intergranular and intragranular cracking, a hardness of about Rc 20 to 35, and a grain size of between about 3 and 4 and are characterized by having good impact toughness and extended service life.

Maintaining the selective removal of H2 S from a variably flowing gas stream containing H2 S and CO2

Abstract: A method and apparatus for selectively removing H 2 S from a gas stream containing H 2 S and CO 2 and having a variable flow rate. The absorption system is divided into at least two absorption columns which are connected in parallel and contain at least two individual absorption volumes connected in series in which the gas and absorbent solution can countercurrently contact each other. The absorption system has means to control the passage of the fluid streams to each absorption column and the absorbent solution through the individual absorption volumes.

A large-scale application of the partial coverage uncapacitated facility location problem

Abstract: The traditional, uncapacitated facility location problem (UFLP) seeks to determine a set of warehouses to open such that all retail stores are serviced by a warehouse and the sum of the fixed costs of opening and operating the warehouses and the variable costs of supplying the retail stores from the opened warehouses is minimized. In this paper, we discuss the partial coverage uncapacitated facility location problem (PCUFLP) as a generalization of the uncapacitated facility location problem in which not all the retail stores must be satisfied by a warehouse. Erlenkotter's dual-ascent algorithm, DUALOC, will be used to solve optimally large (1600 stores and 13 000 candidate warehouses) real-world implemented PCUFLP applications in less than two minutes on a 500 MHz PC. Furthermore, a simple analysis of the problem input data will indicate why and when efficient solutions to large PCUFLPs can be expected.