Development of Technology for Controlling BOP (Basic Oxygen Process) Charging Emissions.

摘要

The report gives results of a study of the basic oxygen process (BOP) hot metal charging emission control technology,conducted with a 900kg pilot vessel designed for the experiments. Complete instrumentation was provided to measure the emissions,the effectiveness of the various systems investigated,and the BOP operating parameters. Twenty heats were made:four had no emission controls operating,to establish base line conditions;three used a slot hood;six used inert gas purging of the vessel,to suppress emissions at the source;two were to evaluate the closure plate concept;two were launder pours (pouring through the vessel hood);two were tests of a canopy hood;and the last was an evaluation of slow hot metal pouring. These tests showed that: a means of minimizing kish carryover will reduce emissions;slot hoods and gas purging are not practical;systems such as closure plates and launders,which allow the vessel to remain under the main hood,are effective;and canopy hoods are effective,if large enough. The study also included:tabulation of domestic BOP shops;an historical review of BOP steelmaking;the influence of scrap type on the type and amount of potential emissions; a survey of BOP charging emission controls in use or which have been tried;and emission tests of a production BOP vessel during hot metal charging.