Search for dissertations about: "CFD in steelmaking"

Showing result 1 - 5 of 6 swedish dissertations containing the words CFD in steelmaking.

2. 1. Modeling of Gas Flows in Steelmaking Decarburization Processes

   Author : Zhili Jack Song; Pär Jönsson; Seppo Louhenkilpi; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; VOD; nozzle; jet; vacuum; BOF; LD; AOD; post combustion; flue; CFD;

   Abstract : The purpose of the current study is to increase the understanding of different steelmaking processes at the decarburization stages by use of mathematical modeling. More specifically, two De-Laval nozzles from a VOD (Vaccum Oxygen Decarburization) process, which is used for producing stainless steels with ultra-low carbon grades, was investigated for different vessel pressures. READ MORE

4. 2. On some positive effects of swirling flow for the continuous cast mould billets

   Author : Shavkat Kholmatov; Pär Jönsson; Simon Lille; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; swirling flow; round mould; divergent angle; aspect ratio; temperature distribution; velocity fluctuations; continuous casting of steel; mathematical modeling; CFD; Metallurgical process engineering; Metallurgisk processteknik;

   Abstract : Continuous caster moulds are the last and most important stage in the steelmaking process, where inclusions can either be generated or removed. With increasing casting speed using conventional immersion nozzles critical problems, such as unstable bulk mould flow have been noticed. READ MORE

5. 3. Decarbonising the Stainless Steelmaking through Alloy Solutions

   Author : Wenjing Wei; Pär Jönsson; Peter Samuelsson; Birat Jean Pierre; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; stainless steel; optimization; raw material; process; quality; decarbonisation; rostfritt stål; optimering; material; process; kvalitet; avkarbonisering; Materials Science and Engineering; Teknisk materialvetenskap;

   Abstract : To reach the goal of the Paris Agreement, the reduction of greenhouse gas emissions (GHG)is becoming one of the most pressing issues in the world today. Unlike most other sectors, thestainless steel industry has a significantly higher burden from upstream emissions comparedto operational emissions. READ MORE

6. 4. Modelling Approaches of Multiphase Phenomena Focusing on an Integrated Steelmaking Route

   Author : Reza Safavi Nick; Pär Jönsson; Björn Glaser; Dong-Yuan Sheng; Stein Tore Johansen; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials Science and Engineering; Teknisk materialvetenskap;

   Abstract : Improvements in numerical methods and developments of computer hardware brought attention to the modelling of metallurgical processes. This has been a critical step in understanding in-furnace conditions throughout the ironmaking and steelmaking process since it is, if not impossible, extremely difficult to conduct measurements during the process. READ MORE

7. 5. A study of some aspects of gas-slag-metal interactions : Towards dynamic process model and control

   Author : Mattias Ek; Sichen Du; Stuart Millman; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; BOF; process modeling; phosphorous capacity; penetration depth; slag foaming; mixing time; inclusion removal;

   Abstract : The present thesis deals with the development of a new type of dynamic model for metallurgical reactors. It also covers some of the theoretical aspects of steelmaking that is necessary to include in such an application. The thesis consists of modeling work, high temperature experiments and cold model experiments. READ MORE