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Coal pulverizers

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Published: 01 January 2002
Fig. 11 6150 steel coal pulverizer shaft that failed by fatigue. (Left) Section through pulverizer showing the inner main shaft that fractured, repaired itself by friction welding, and fractured a second time. (Right) Photograph of the friction welded surface More
Image
Published: 31 August 2017
Fig. 37 High-chromium (ASTM III-A) tire and wear track segment for coal pulverizing. Courtesy of Columbia Steel Casting Co. More
Image
Published: 31 August 2017
Fig. 41 High-chromium (ASTM II-D) coal-pulverizer ring. Courtesy of GIW Industries, Inc. More
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
... using coal as a primary fuel. The combustion process—cyclone, pulverized-coal, or fluidized-bed firing—determines the type and characteristics of the ash. Waste ash, fly ash, and bottom ash are generated in large volumes and must be dealt with in an environmentally acceptable manner. Fly ash comprises...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004151
EISBN: 978-1-62708-184-9
...-Uhde) process in Spain, and a plant based on the Shell process in the Netherlands. All present plants include entrained slagging gasifiers and cold-gas cleanup equipment. In this type of gasifier, the fuel—coal, petroleum coke, or heavy oil bottoms—are pulverized and fed to the gasifier in dry...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003630
EISBN: 978-1-62708-182-5
..., the coal is pulverized in a highly abrasive process. Heated air, which accelerates corrosion, carries the coal fines through metal tubes to the burner units. The moving fines erode these metal pipes. At the end of the pipes, the fines are injected into the boiler through nozzles that themselves are eroded...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001808
EISBN: 978-1-62708-180-1
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004144
EISBN: 978-1-62708-184-9
..., industrial gas turbine, and combined-cycle power plants. The most common and widely used is the pulverized-coal-fired steam power plant. Because of the complex and corrosive environments in which power plants operate, corrosion has been a serious problem, with a significant impact on reliability...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006341
EISBN: 978-1-62708-179-5
... from powdered coal containing 1.25–2.00% S. (b) Completely oxidized. (c) Exposed to a heat cycle, 600 h at 870–925 °C (1600–1700 °F), 600 h at 870–925 °C (1600–1700 °F) and 425–480 °C (800–900 °F), 600 h at 425–480 °C (800–900 °F). Source: Ref 7 Figure 16 illustrates the wide range...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005327
EISBN: 978-1-62708-187-0
... for the more severe applications that justify its added alloy costs. It is commonly used for pump volutes handling abrasive slurries and coal pulverizer table segments and tires. The class I type C alloy (Ni-Hard 3) is specifically designed for the production of grinding balls. This grade is both sand cast...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003692
EISBN: 978-1-62708-182-5
... the moisture resistance of coal tars. Can embrittle after prolonged exposure to dry environments or temperatures above 150 °C (300 °F), and can soften and flow at temperatures as low as 40 °C (100 °F) Often used as relatively inexpensive coating in atmospheric service, where coal tars cannot be used...
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
... the temperature has a mixed effect on the erosion rate for ductile materials ( Ref 69 , 81 ). A substantial amount of high-temperature erosion testing has been done in support of the gas turbine and coal gasification industries. This testing has provided a substantial amount of results on temperature effects...
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
... in support of the gas turbine and coal gasification industries. The testing provided a substantial amount of results on temperature effects. Corrosion can increase or decrease the apparent erosion rate, depending on the rate of oxide or other corrosion product formation and the resistance of the product...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006825
EISBN: 978-1-62708-329-4
... or hot water. Power boilers using pulverized coal, fuel oil, or natural gas as the fuel are used in thermal power plants to produce steam for generation of electricity. They are very large in size and are operated at high pressure and temperature in order to produce high-pressure, high-temperature...
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
... SCC not only in the low-temperature heat exchangers, but also in the hot boiler casings. Dry Flue Gas Handling Systems in Conventional Combustion Systems A conventional coal-fired power generation boiler is illustrated in Fig. 5 ; the locations of items prone to dew-point corrosion...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003091
EISBN: 978-1-62708-199-3
... temperatures and the need to control the flame temperature has allowed the use of hydrocarbon fuel injection. This development enhances the reducing power of the bosh gas and in turn lowers the coke rate. Natural gas, coke-oven gas, oil, tar and pulverized coal, or oil-coal slurry have all been effectively...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001104
EISBN: 978-1-62708-162-7
.... Almost 50% of the total production of cemented carbides is used for nonmetal cutting applications. Their properties also make them appropriate materials for structural components, including plungers, boring bars, powder compacting dies and punches, high-pressure dies and punches, and pulverizing hammers...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003471
EISBN: 978-1-62708-195-5
... fuel, because its heat value is typically equivalent to that of a low- grade coal. EnerGroup has reported that ASR, for 12 samples used, has an average heat value of 12.6 MJ/kg. The mass of ASR may be reduced 50% by incineration—thus reducing disposal costs and landfill volumes ( Ref 15 ). Japanese...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001277
EISBN: 978-1-62708-170-2
... into a thin sheet, which is cooled and crushed. The chips are pulverized to a fine powder of carefully controlled particle size, ensuring optimum fluidity and efficient flow through the finishing system. For more information on powder painting, see the section on methods of paint application in this article...
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001733
EISBN: 978-1-62708-178-8