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preheat and furnace scrap burners

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Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005195
EISBN: 978-1-62708-187-0
... hole, water-cooling system, preheat and furnace scrap burners, and ladles. The article describes the acid and basic steelmaking practices. It discusses the raw materials used, oxidation process, methods of heat reduction, and deoxidation process in the practices. The article provides a discussion...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005350
EISBN: 978-1-62708-187-0
.... Everything is melted under the surface of the bath for greatly reduced metal melt loss (2 to 5% in gas-fired furnaces and less than 1% with electric furnaces). Many options are available: preheat hearths for sows and ingots, circulation wells for scrap, vortexing for chips, flue pressurization, well space...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006484
EISBN: 978-1-62708-207-5
... container/new can stock Lacquers, paints 2–3 Used lithographic plate Phenolic resin, inks 2 Window frames Thermolacquers, resins 21 Source: Ref 13 For scrap with low organic content, decoating in the preheating chamber of a twin-chamber melting furnace is effective and eliminates...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005285
EISBN: 978-1-62708-187-0
... carbides and nitrides to the suspended inclusion matter in the metal and ultimately wind up in the dross. Finally, excessive melting temperatures, long holding periods, improper burner adjustment or electrical heating controls, worn elements, and deteriorating furnace doors that permit air aspiration...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003173
EISBN: 978-1-62708-199-3
... bottom. Melting in a direct current furnace takes longer unless a heel of molten metal is left in the furnace. Fig. 8 Sectional view showing the basic components of a direct current arc furnace As in other melting methods, the scrap should be preheated, and dust and fume hoods are required...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003050
EISBN: 978-1-62708-200-6
... combustion air is preheated. A number of techniques can be used to reduce NO x emissions. Flue gas recirculation, obtained within the kiln or by external duct work with the combustion air or fuel, lowers the flame temperature that inhibits NO x formation. Cold air burners that use a flat flame also...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005197
EISBN: 978-1-62708-187-0
... preheated air blast recuperative hot blast systems duplex electric holders refractory lining water-cooled cupolas emission-control systems THE CUPOLA is basically a simple cylindrical shaft furnace that burns coke for fuel. The heat generated is intensified by the blowing of air through the heated...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006337
EISBN: 978-1-62708-179-5
... associated with the cupola operation and its accompanying support facilities. A cupola can also use a wider variety of lower-cost ferrous scrap than is suited to induction melting. The cupola furnace generally is the better economic solution where uniform types of castings are produced at high hourly...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005196
EISBN: 978-1-62708-187-0
... hood equipped with gas burners, which heat the solids on a vibrating conveyor by means of forced convection of the hot gases through the material. Figure 10 shows the various major components of the system. It is important to get the preheated charge into the furnace quickly to take advantage...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005198
EISBN: 978-1-62708-187-0
... by gas or oil burners, there are both high levels of metal loss and increased oxidation due to the combustion products generated. In fuel-fired crucible furnaces, however, the flame is isolated from the metal, and the metal is heated indirectly with heat conducted through the crucible. This indirect...
Book Chapter

By John C. Bittence
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003222
EISBN: 978-1-62708-199-3
... and Procedures for Small Operations A major step in scrap processing is size reduction. Large items must be cut to simplify handling, increase density, and to enable them to be charged into a furnace. For small-scale scrap processing, gas-cutting, plasma-arc, or carbon-arc torches are the tools...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006535
EISBN: 978-1-62708-207-5
... and holding, and various burner capacities and types. Recuperation concepts include charge preheating, preheating combustion air, and cogeneration. The growth in recycling has resulted in a number of specialized processes, furnaces, and systems to improve metal recovery from scrap. Molten metal pumps have...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001118
EISBN: 978-1-62708-162-7
... can be utilized very effectively to preheat the constant flow of scrap and/or combustion air. In the batch process of the open hearth furnace, the supply and demand of waste heat for scrap preheating are essentially out of phase. The new melters improve fuel efficiency 12% on the basis of constant...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005904
EISBN: 978-1-62708-167-2
..., and dealing with disturbances. channel furnace crucible furnaces cupola furnaces energy consumption extraction induction furnaces induction melting metal scrap optimized design pouring furnaces process monitoring refractory lining refractory materials wear MELTING IN IRON FOUNDRIES...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005352
EISBN: 978-1-62708-187-0
... that the burners above the melt transfer more radiant heat to the surface of the melt. If the surface temperature becomes hotter than the lower parts of the bath, then the heat transfer for melting become less efficient in reverberatory furnaces. Other nonferrous alloys, such as zinc, magnesium, and copper, also...
Series: ASM Handbook
Volume: 4B
Publisher: ASM International
Published: 30 September 2014
DOI: 10.31399/asm.hb.v04b.a0005931
EISBN: 978-1-62708-166-5
...-acquisition (SCADA) system is used to monitor, collect, and store data from multiple pieces of equipment. burners configurable controllers flow measurement control systems fuel-fired furnaces heat treating furnaces mechanical motion component programmable logic controllers pumps quench agitators...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003091
EISBN: 978-1-62708-199-3
... furnace from iron ore, limestone, and coal (coke) (see Fig. 1(a) ). Because it contains excessively high levels of silicon, manganese, carbon, and other elements, this liquid iron, together with scrap and fluxing agents, is then introduced into either a basic oxygen furnace or electric-arc furnace...
Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005807
EISBN: 978-1-62708-165-8
.... High-Velocity Convection Burner The high-velocity convection burner is basically a miniature refractory-lined furnace in which heat is released at rates as high as 415 MJ/m 3 · s (4 × 10 7 Btu/ft 3 · h). The air-gas premixture, supplied through a pipe connection, flows through the orifices...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005899
EISBN: 978-1-62708-167-2
... masses (a) in the crucible wall and (b) on the crucible floor. Source: Ref 4 Alternatively, the refractory lining can be sintered solely by electricity, without using a burner for preheating: the crucible with the fitted template is charged with melting stock and inductively heated up...
Book Chapter

Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005199
EISBN: 978-1-62708-187-0
... of steel being made. Foundries that have access to a good grade of scrap, and therefore do not need to reduce the phosphorus and sulfur contents of the steel to meet specifications, usually prefer to use a furnace lined with silica refractories (acid lined). Foundries that do not have a good source of low...