Influence of Obstruction at Gas-Injection Nozzles (Number and Position) in RH Degasser Process
| Autor: | Eduardo Prado Baston, Carlos Antônio da Silva, Renata Carolina Zanetti Lofrano, Fabiano Luiz Naves, Juan Canellas Bosch Neto, Johne Jesus Mol Peixoto, Alexandre Boscaro França, David Tiago de Faria, Luis Carlos Trindade |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science Degasser Nozzle Flow (psychology) 0211 other engineering and technologies Metals and Alloys Process (computing) 02 engineering and technology Mechanics Condensed Matter Physics 01 natural sciences Circulation (fluid dynamics) Mechanics of Materials Position (vector) 0103 physical sciences Metallic materials Materials Chemistry Constant (mathematics) 021102 mining & metallurgy |
| Zdroj: | Metallurgical and Materials Transactions B. 50:578-584 |
| ISSN: | 1543-1916 1073-5615 |
| DOI: | 10.1007/s11663-018-1474-6 |
| Popis: | One of the main problems that affects Ruhrstahl-Heraeus (RH) degasser circulation rate is the obstruction of the gas-injection nozzles. This study aims to elucidate the effects of obstructions in quantity and location using a physical model that depicts 16 injection nozzles on the up-leg distributed symmetrically in 2 rings (8 nozzles/ring). We simulated six, symmetric and nonsymmetric, obstruction conditions to gas flow. The gas-flow rate was varied from 30 to 130 NL/min. The results for symmetric obstructions when the gas-flow rate is kept constant, indicates that the circulation rate in the equipment does not significantly change. However, when these obstructions are non-symmetric, the circulation rate varies drastically, even when the gas-flow rate is kept constant. The analysis of the experimental data generated from this study allowed to determine an equation for the circulation rate that takes into consideration the number and distribution of blocked nozzles. |
| Databáze: | OpenAIRE |
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