L-D steelmaking at MID-1967

Scheduling High-Grade Steelmaking

The paper describes a scheduling system for a high-grade steel making plant. Because very specialized steel grades are produced the variety of the chemical analysis of the heats is very high and the lot sizes are small. One of the most constraining factors in the production is the infiltration of chemical elements between consecutive heats in the electric arc furnace. To find a schedule that vi...

Steelmaking and Casting

Thin slab casting and rolling was originally developed as a low cost alternative to a conventional casting and rolling process route. However, due to the technological restrictions of the first generation plants, only limited quality and productivity goals could be achieved, questioning its further application to more advanced applications. This paper describes the original contributions that D...

EARTH EXPANSION GENERAL RELATIVITY PROBLEMS OF ABSTRACT ALGEBRA D D C » JÜL 3 1967 jjl

L / d . ) . Liver transplantation at the University of Colorado

In this paper, we will try to cover three questions about orthotopic liver transplantation, that is to say about liver replacement. The first question is what are the indications for hepatic transplantation? Second, what have been the results? Third, what are the prospects for future improvement? In Figure 1 is depicted a reminder of what exactly is orthotopic liver transplantation. With this o...

Chapter 9 - Oxygen Steelmaking Processes

The oxygen steelmaking process rapidly refines a charge of molten pig iron and ambient scrap into steel of a desired carbon and temperature using high purity oxygen. Steel is made in discrete batches called heats. The furnace or converter is a barrel shaped, open topped, refractory lined vessel that can rotate on a horizontal trunnion axis. The basic operational steps of the process (BOF) are s...