Treatment of multiple injections in the iron blast furnace by the rist diagram

Abstract

The treatment of injections in the iron blast furnace by a graphics method in the Rist Diagram is refined further. This method employs lines and pivots to represent process conditions during an injection. Formulae locating the abscissae of the key pivotsI, J, K, andL in the diagram were established and applied in a previous study of simple injections. A procedure is now introduced for multiple injections which are treated as combinations of simple injections and which employ the pivot abscissae referring to the simple injections. In this procedure, the pivot abscissa for the multiple injection is shown to be a weighted mean, be it harmonic or arithmetic, of the pivot abscissae for the primary injections.