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Direct steelmaking through microwave...

Wang, Yongqing.

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Direct steelmaking through microwave and electric arc heating.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Direct steelmaking through microwave and electric arc heating./
Author:	Wang, Yongqing.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2005,
Description:	147 p.
Notes:	Source: Dissertations Abstracts International, Volume: 67-01, Section: B.
Contained By:	Dissertations Abstracts International67-01B.
Subject:	Materials science. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3167438
ISBN:	9780542032462

Direct steelmaking through microwave and electric arc heating.
Wang, Yongqing.

Direct steelmaking through microwave and electric arc heating. - Ann Arbor : ProQuest Dissertations & Theses, 2005 - 147 p.

Source: Dissertations Abstracts International, Volume: 67-01, Section: B.

Thesis (Ph.D.)--Michigan Technological University, 2005.

This item must not be sold to any third party vendors.

The research for this dissertation is associated with a new steelmaking technology, in which microwave heating and electric arc heating are used as heating methods. The innovative core of this technology is the microwave assisted electric arc furnace (MEAF) process, which can produce molten steel directly from pellets consisting of iron ore and powdered coal. The direct steelmaking technology is a revolutionary change from conventional steelmaking. This technology is intended to offer a competitive solution, which meets the challenge of increasing environmental and energy pressures currently confronted by the steel industry. As a key apparatus for investigating the direct steelmaking technology, a bench-scale microwave assisted electric arc furnace was designed and implemented. This furnace mainly consists of an electric arc heating subsystem and a microwave heating subsystem, whose output power is 6000 W and frequency is 2.45 GHz. A series of direct steelmaking tests were conducted in the bench-scale MEAF. The effects of pellet composition, binder, microwave/electric arc heating ratio, and heating times on steel yield were investigated. Based on the evaluation of steels and slags, the effects of pellet composition, refractory materials and linings on steel quality and slag basicity were investigated. In addition, the role of microwave heating in the MEAF process was studied and demonstrated in three specially-designed direct steelmaking experiments. In order to calculate the actual specific energy consumption of MEAF process, an energy consumption model was developed. In this model, the different contributions of coal as fuel and as reductant to energy input were distinguished. Equations for calculating the actual specific energy consumption of MEAF process and the minimum coal ratio of pellet sample were presented. The energy efficiency of the new direct steelmaking technology was assessed by comparing with the two popular routes of conventional steelmaking. (Abstract shortened by UMI.).

ISBN: 9780542032462Subjects--Topical Terms:

543314
Materials science.
Subjects--Index Terms:

Electric arc heating

Direct steelmaking through microwave and electric arc heating.
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100 1 $a Wang, Yongqing. $3 1902772
245 1 0 $a Direct steelmaking through microwave and electric arc heating.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2005
300 $a 147 p.
500 $a Source: Dissertations Abstracts International, Volume: 67-01, Section: B.
500 $a Publisher info.: Dissertation/Thesis.
500 $a Advisor: Hwang, Jiann-Yan.
502 $a Thesis (Ph.D.)--Michigan Technological University, 2005.
506 $a This item must not be sold to any third party vendors.
506 $a This item must not be added to any third party search indexes.
520 $a The research for this dissertation is associated with a new steelmaking technology, in which microwave heating and electric arc heating are used as heating methods. The innovative core of this technology is the microwave assisted electric arc furnace (MEAF) process, which can produce molten steel directly from pellets consisting of iron ore and powdered coal. The direct steelmaking technology is a revolutionary change from conventional steelmaking. This technology is intended to offer a competitive solution, which meets the challenge of increasing environmental and energy pressures currently confronted by the steel industry. As a key apparatus for investigating the direct steelmaking technology, a bench-scale microwave assisted electric arc furnace was designed and implemented. This furnace mainly consists of an electric arc heating subsystem and a microwave heating subsystem, whose output power is 6000 W and frequency is 2.45 GHz. A series of direct steelmaking tests were conducted in the bench-scale MEAF. The effects of pellet composition, binder, microwave/electric arc heating ratio, and heating times on steel yield were investigated. Based on the evaluation of steels and slags, the effects of pellet composition, refractory materials and linings on steel quality and slag basicity were investigated. In addition, the role of microwave heating in the MEAF process was studied and demonstrated in three specially-designed direct steelmaking experiments. In order to calculate the actual specific energy consumption of MEAF process, an energy consumption model was developed. In this model, the different contributions of coal as fuel and as reductant to energy input were distinguished. Equations for calculating the actual specific energy consumption of MEAF process and the minimum coal ratio of pellet sample were presented. The energy efficiency of the new direct steelmaking technology was assessed by comparing with the two popular routes of conventional steelmaking. (Abstract shortened by UMI.).
590 $a School code: 0129.
650 4 $a Materials science. $3 543314
650 4 $a Metallurgy. $3 535414
653 $a Electric arc heating
653 $a Microwave heating
653 $a Steelmaking
690 $a 0794
710 2 $a Michigan Technological University. $3 1032921
773 0 $t Dissertations Abstracts International $g 67-01B.
790 $a 0129
791 $a Ph.D.
792 $a 2005
793 $a English
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3167438