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wet fly ash systems

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Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004161
EISBN: 978-1-62708-184-9
...Abstract Abstract Ash handling is a major challenge for utilities and industries using coal as a primary fuel. This article discusses the operating problems associated with conventional fly ash/bottom ash handling systems. It describes the two types of fly ash systems, namely, dry and wet fly...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005339
EISBN: 978-1-62708-187-0
...-rich zone Fig. 30 (a) Microstructure of Al-SiC-graphite hybrid composite. (b) Cylinder liners made out of hybrid composites. (c) Hybrid composite disc brake. (d) Hybrid composite brake rotor Fig. 31 (a) Fly ash cenospheres. (b) Fly ash cenospheres in α-aluminum matrix Fig...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003050
EISBN: 978-1-62708-200-6
... industry and as raw materials for other processes. This article describes the recycling of in-process scrap and industrial wastes (fly ash, red mud, metallurgical waste, and other waste products), and applications of these recycled products. It focuses on environmental regulations such as Resource...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001816
EISBN: 978-1-62708-180-1
.... The first is increases in heat flux. In a superheater or a reheater, partial blockage of the convection pass by fly ash will increase the flue-gas flow to certain regions. Higher velocity will increase the steam-side heat-transfer coefficient, h 0 , and will increase metal temperature. Flame impingement...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004137
EISBN: 978-1-62708-184-9
... the materials. Erosion generally occurs as a result of fly ash carried by the gas impacting a surface in a relatively dry area of the system or the liquid slurry impinging on a wetted surface. In either case, areas susceptible to corrosion attack are produced. Where pH is neutral or higher, austenitic...
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003843
EISBN: 978-1-62708-183-2
... Material Primary contribution/desired property Portland cement Cementing material/durability Blended cement Cementing material/durability; high strength Fly ash Cementing material/durability; high strength Slag Cementing material/durability; high strength Silica fume Cementing...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004159
EISBN: 978-1-62708-184-9
... precipitator housing and fittings and on the chimney stack. Fly ash precipitators are not normally used on oil- or gas-fired equipment, but are usually present on coal-fired systems or incinerator exhaust streams. Filter bags are sometimes used instead; however, both methods of dust collection are located...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003568
EISBN: 978-1-62708-180-1
... of mechanical seals for abrasive service are even axially split for ease of replacement. Another example of abrasive erosion is the impact of fly ash entrained in the flue gases in screen tubes or superheater tubes of boiler systems. Erosion is enhanced by high flow velocities; thus, partial fouling of gas...
Series: ASM Handbook
Volume: 5A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v05a.a0005708
EISBN: 978-1-62708-171-9
.... Sci. , Vol 46 , 2004 , p 1311 – 1331 10.1016/j.corsci.2003.09.026 14. Hearly J.A. , Liu C. , Little J.A. , and Sturgeon A.J. , Corrosion of Ni-Al High Velocity Oxyfuel (HVOF) Thermal Spray Coating by Fly Ash and Synthetic Biomass Ash Deposits , Br. Corros. J. , Vol...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006795
EISBN: 978-1-62708-295-2
... of mechanical seals for abrasive service are even axially split for ease of replacement. Another example of abrasive erosion is the impact of fly ash entrained in the flue gases in screen tubes or superheater tubes of boiler systems ( Ref 91 ). Erosion is enhanced by high flow velocities; thus, partial...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004168
EISBN: 978-1-62708-184-9
...) concrete mix designs. Fly ash, a by-product from burning coal, is a pozzolanic material that can be used to replace cement. Pozzolans are finely divided mineral additions, or mineral admixtures, that, when mixed with calcium hydroxide, alkalis, and water, produce a cementitious material. Good mix designs...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004124
EISBN: 978-1-62708-184-9
... Erosion Fly ash Falling slag Sootblower Coal particle Waterside corrosion Caustic corrosion Hydrogen damage Pitting (localized corrosion) Stress-corrosion cracking Fatigue Vibration Thermal Corrosion Fireside corrosion Low-temperature Waterwall Coal ash Oil...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001091
EISBN: 978-1-62708-162-7
... from coal fly ash and phosphorus flue dust. Despite the fact that gallium is currently being used in some sophisticated military and satellite systems, and is planned to be incorporated into additional systems, it has not been designated as a material to be added to the U.S. National Defense...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006787
EISBN: 978-1-62708-295-2
... and Incoloy 800H in molten 34.42wt%NaCl-5.58wt%LiCl at 650 and 700 °C (1200 and 1290 °F) under nitrogen. Corrosion increases with increasing temperature. Source: Ref 77 Fig. 19 Schematic of nominal design of concentrating solar power system using molten salts. Solar energy is concentrated...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003472
EISBN: 978-1-62708-195-5
... production alloys, a hard second phase such as silicon carbide (SiC) or aluminum oxide (Al 2 O 3 ) is used. Other reinforcements include graphite, boron, boron carbide, fly ash, and titanium carbide. The alloys can be discontinuously reinforced with particles and whiskers or continuously reinforced...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006297
EISBN: 978-1-62708-179-5
..., and gas-triggered systems. It discusses three main types of reclamation systems: wet, dry, and thermal. The article concludes with a description of both nonpermanent and permanent mold processes. References References 1. Principles of Sand Control , AFS Green Sand Committee 4-M, American...
Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006040
EISBN: 978-1-62708-172-6
... in which steel substrates are protected from corrosion by both protective coatings and ICCP systems. This criterion is really all about good weathering resistance, including good resistance to UV light (resistant to chalking), moisture vapor, salt fog, and wetting and drying cycles. Coatings with good...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003684
EISBN: 978-1-62708-182-5
...; and over expansion joints in concrete slabs not to exceed 6 m (20 ft) on centerlines. A monolithic lining can be applied over acid-attacked masonry construction. The first step is the surface preparation of the brick. Fly ash and other contaminants should be removed by sandblasting or waterblasting...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003555
EISBN: 978-1-62708-180-1
... Fe 2 O 3 + 4 SO 2 2 SO 2 + O 2 ⇄ 2 SO 3 3 K 2 SO 4 + Fe 2 O 3 + 2 SO 3 ⇄ 2 K 3 Fe ( SO 4 ) 3 The greatest metal loss creates flat sites at the interface between the fly-ash-covered half...
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003805
EISBN: 978-1-62708-183-2
... supplementary cementing materials or blended cements proven by testing to control the reaction. Supplementary cementing materials include fly ash; ground, granulated blast furnace slag; silica fume; and natural pozzolans. See the article “Environmental Performance of Concrete” in this Volume. Chloride...