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169:, can burn at atmospheric (20%) concentrations of oxygen because it has a high surface area-to-mass ratio and relatively low mass, which prevents the heat from being dissipated in the bulk of the material. When the oxygen concentration is increased, steel wool will burn faster. Burning steel wool is simply the rapid oxidation of iron into
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Leo
Malcher filed for a patent in 1922 entitled "Process of attacking compact mineral material, noncombustible in oxygen". The patent uses "a suitable disintegrating flux to act upon the material at the point where it is desired to attack it ... the fuel employed in the example to be described is
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Often used as a heavy duty demolition tool, the thermic lance is also used to remove seized axles of heavy machinery without damaging the bearings or axle housing. This technique is often used on the pins and axles of large equipment such as cranes, ships, bridges, and sluice-gates. In addition,
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metallic iron, and is arranged in the form of two concentric pipes". The annulus between the two pipes was filled with a flux (sodium carbonate borax and sodium chloride in equal proportions) and oxygen was supplied through the inner tube.
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Thermal lances have been constructed for demonstration using foodstuffs (including bacon and dried spaghetti) as the fuel instead of steel rods; a supply of pure oxygen is more important to drive rapid oxidation than the fuel being burned.
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The temperature at which a thermal lance operates varies depending on the environment. Some estimates put the maximum temperature at 4,500 °C (8,130 °F), while others calculate it to be 2,730 °C (4,950 °F).
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192:; the thermal lance uses steel in the form of rods rather than wool, the rods will burn with a sufficiently high supply of concentrated oxygen.
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Kosanke, B. J.; Sturman, B.; Kosanke, K.; von
Maltitz, I.; Shimizu, T.; Wilson, M. A.; Kubota, N.; Jennings-White, C.; Chapman, D. (2004).
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torch. An intense stream of burning steel is produced at the working end and can be used to cut rapidly through thick materials, including
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thermal lancing is used to clean the bottom of steel furnace pots, which accumulate a skull layer of slag and iron during operation.
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One end of the tube is placed in a holder and oxygen is fed through the tube. The far end of the tube is pre-heated and lit by an
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Wang, Haorong; Hlavacek, Vladimir; Pranda, Pavol (2004). "Model
Analysis of Thermal Lance Combustion".
553:(device for fixing holes by method of smelting, especially into buildings, invented by Berczes et al.)
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to create very high temperatures for cutting. It consists of a long steel tube packed with
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521:, Leo M Malcher, issued May 13, 1924, assigned to Oxweld Acetylene Co
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314:"Thermal Lancing case study - dust collector extends deskulling operation"
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337:"Here's How Steel Wool Burns (and Why It Looks Like the Death of Krypton"
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385:"Chapter 16.3: Characterization; Description of Select Technologies"
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Thermal lance cutting a railroad bridge to prepare for replacement
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rods, which serve as fuel; these are sometimes mixed with
246:"Numerical Model for the Combustion of a Thermal Lance"
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MartĂ-RossellĂł, T.; Ray, P.; Li, J.; Lue, L. (2021).
364:. University of Washington, Department of Chemistry
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441:Industrial & Engineering Chemistry Research
118:Simplified principle and graph of temperature (
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254:Industrial and Engineering Chemistry Research
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16:Thermal tool that cuts dense heavy materials
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418:. Journal of Pyrotechnics. p. 124.
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391:. New York: ASME Press. pp. 4â46.
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122:) vs distance from the reacting tip (
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494:"Thermic lance made from spaghetti"
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492:Nathan, Mike (February 11, 2011).
335:Emspak, Jesse (October 24, 2017).
106:rods to increase the heat output.
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466:Gray, Theodore (April 15, 2009).
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362:"Combustion of Steel Wool"
289:"What is a Thermic Lance?"
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550:U.S. patent 3,460,223
542:U.S. patent 3,921,542
519:US grant 1494003A
415:Pyrotechnic Chemistry
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90:that heats and melts
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48:oxygen lance
341:LiveScience
100:alloy steel
84:burning bar
51:burning bar
37:Other names
561:Categories
231:References
167:steel wool
159:See also:
275:236384938
110:Operation
498:Hackaday
224:Thermite
218:See also
140:concrete
104:aluminum
572:Welding
503:11 July
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320:11 July
298:11 July
209:History
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96:oxygen
271:S2CID
249:(PDF)
136:steel
92:steel
86:is a
82:, or
505:2022
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