Search for dissertations about: "Johan Ekengård"

Found 2 swedish dissertations containing the words Johan Ekengård.

2. 1. Slag/Metal Metallurgy in Iron and Steel Melts

   Author : Johan Ekengård; Pär Jönsson; Attila Dioszegi; Johan Björkvall; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; austenit; syreaktivitet; slagg; fördelning; primär dendrit; metalldroppar; lamellär grafit; svavel; kompaktgrafit; skänk; nodulär grafit; raffinering; Metallurgical process science; Metallurgisk processvetenskap;

   Abstract : In this work, the metal and slag phase mixing in three steps of a ladle refining operation of steel melts and for an oxygen balance during cooling of cast iron melts have been studied at two Swedish steel plants and at two Swedish cast iron foundries, respectively. In order to predict the oxygen activity in the steel bulk in equilibrium with the top slag as well as in metal droplets in the top slag in equilibrium with the top slag, three slag models were used. READ MORE

4. 2. Aspects on slag/metal equilibrium calculations and metal droplet characteristics in ladle slags

   Author : Johan Ekengård; KTH; []
   Keywords : ;

   Abstract : In the present work the mixing between the metal and slagphase during the ladle refining process from tapping from theelectric arc furnace to casting in two different Swedish steelplants has been studied.Three slag models and the sulphur-oxygen equilibrium betweenslag and steel was used together with the dilute solution modelfor the liquid steel phase to predict the equilibrium oxygenactivity in steel bulk and metal droplets in top slag inequilibrium with the top slag. READ MORE