The analysis of acoustic noise in a submerged arc furnace

Simple item page
dc.contributor.advisorNaudé, D Een_ZA
dc.contributor.authorChadowitz, Jacken_ZA
dc.date.accessioned2016-03-17T07:05:17Z
dc.date.available2016-03-17T07:05:17Z
dc.date.issued1977en_ZA
dc.descriptionBibliography: page 123.en_ZA
dc.description.abstractThis project deals with Acoustic Noise Analysis in a submerged Arc Furnace. Operators and Metallurgists believe that the acoustic noise coming from the furnace conveys information as to the operating conditions of the furnace. This submerged arc furnace reduces ferrochrome ore to the metal. A carefully made-up mixture of ore and slag producing materials is continually fed into the furnace. Three large carbon electrodes provide the heat to melt the ore by means of resistance heating and/or arcing. The exact mechanism is unknown. The furnace is rated at 48 MVA maximum and the electrodes carry currents of the order of 100 kiloamperes. The metal is tapped approximately every four hours. The term submerged arc is used because the furnace is completely enclosed and the arc occurs below a layer of ore mix. This differs from an open arc furnace which does not have a roof and where the operators can actually see into the top of the furnace. The operation of the submerged arc furnace is also different from that of a scrap melting electric arc furnace. A scrap furnace has set melting cycles and has acoustic noise changes determined by falling metal, melting and initial arcing. Higgs, Papadakis and Sheets (Ref .1) performed signature analysis on acoustic noise from a scrap furnace to differentiate between different operating conditions in the furnace. The aim of the present project was to collect and analyze data records of acoustic noise and operating conditions from the number four furnace at Ferrometals 1 Witbank. The data was recorded on analogue and computer magnetic tape and analyzed at UCT. The analysis was aimed at explaining the operators' theory of the acoustic noise relating to operating conditions of the furnace. This procedure is different from that of Reference 1 in that they did their analysis with an on-plant analyzing computer, and that their furnace had a set defined cycle whereas the submerged arc furnace is a continuous feed system. Reference 1 is the only known information relating to the analysis of noise in the electric arc furnaces, and their furnace operation is largely different to that of the furnace used in this project.en_ZA
dc.identifier.apacitationChadowitz, J. (1977). <i>The analysis of acoustic noise in a submerged arc furnace</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Electrical Engineering. Retrieved from http://hdl.handle.net/11427/17857en_ZA
dc.identifier.chicagocitationChadowitz, Jack. <i>"The analysis of acoustic noise in a submerged arc furnace."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Electrical Engineering, 1977. http://hdl.handle.net/11427/17857en_ZA
dc.identifier.citationChadowitz, J. 1977. The analysis of acoustic noise in a submerged arc furnace. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Chadowitz, Jack AB - This project deals with Acoustic Noise Analysis in a submerged Arc Furnace. Operators and Metallurgists believe that the acoustic noise coming from the furnace conveys information as to the operating conditions of the furnace. This submerged arc furnace reduces ferrochrome ore to the metal. A carefully made-up mixture of ore and slag producing materials is continually fed into the furnace. Three large carbon electrodes provide the heat to melt the ore by means of resistance heating and/or arcing. The exact mechanism is unknown. The furnace is rated at 48 MVA maximum and the electrodes carry currents of the order of 100 kiloamperes. The metal is tapped approximately every four hours. The term submerged arc is used because the furnace is completely enclosed and the arc occurs below a layer of ore mix. This differs from an open arc furnace which does not have a roof and where the operators can actually see into the top of the furnace. The operation of the submerged arc furnace is also different from that of a scrap melting electric arc furnace. A scrap furnace has set melting cycles and has acoustic noise changes determined by falling metal, melting and initial arcing. Higgs, Papadakis and Sheets (Ref .1) performed signature analysis on acoustic noise from a scrap furnace to differentiate between different operating conditions in the furnace. The aim of the present project was to collect and analyze data records of acoustic noise and operating conditions from the number four furnace at Ferrometals 1 Witbank. The data was recorded on analogue and computer magnetic tape and analyzed at UCT. The analysis was aimed at explaining the operators' theory of the acoustic noise relating to operating conditions of the furnace. This procedure is different from that of Reference 1 in that they did their analysis with an on-plant analyzing computer, and that their furnace had a set defined cycle whereas the submerged arc furnace is a continuous feed system. Reference 1 is the only known information relating to the analysis of noise in the electric arc furnaces, and their furnace operation is largely different to that of the furnace used in this project. DA - 1977 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1977 T1 - The analysis of acoustic noise in a submerged arc furnace TI - The analysis of acoustic noise in a submerged arc furnace UR - http://hdl.handle.net/11427/17857 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/17857
dc.identifier.vancouvercitationChadowitz J. The analysis of acoustic noise in a submerged arc furnace. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Electrical Engineering, 1977 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/17857en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Electrical Engineeringen_ZA
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherElectrical Engineeringen_ZA
dc.titleThe analysis of acoustic noise in a submerged arc furnaceen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMSc (Eng)en_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
thesis_ebe_1977_chadowitz_jack.pdf
Size:
4.64 MB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Masters