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drossing fluxes

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Image
Published: 01 December 2008
Fig. 9 Typical range of dross fluxing aluminum recovery More
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
... implications of dross, and in-plant enhancement or recovery of dross. It discusses the influence of the melter type on dross generation and the influence of charge materials and operating practices on melt loss. Fluxing is a word applied in a broad sense to a number of melt-treating methods. The article also...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005300
EISBN: 978-1-62708-187-0
.... It reviews the classification of solid fluxes depending on their use and function at the foundry operation. These include cover fluxes, drossing fluxes, cleaning fluxes, and furnace wall cleaner fluxes. The article also examines the operational practices and applications of the flux injection...
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
..., drossing fluxes, cleaning fluxes, and furnace wall cleaner fluxes. The article reviews the basic considerations in proper flux selection and fluxing practices. It explains the basic principles of degassing and discusses the degassing of wrought aluminum alloys. The article describes filtration in wrought...
Image
Published: 01 December 2008
Fig. 8 Fluxed black powdery dross low in aluminum More
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005306
EISBN: 978-1-62708-187-0
.... In remelt pots, where trim scrap and other scrap is melted, chloride-base drossing fluxes can be used. Pitch, sawdust, or wood chips are used to agglomerate the residues that accumulate on the surface. The lead is usually first softened (refined) in the production of the newer Ca-Pb-Sn alloys used...
Book Chapter

Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005307
EISBN: 978-1-62708-187-0
... casting alloys). The intermetallic particles can be lighter than the base alloy and therefore rise to the top dross. Fluxing salt inclusions and exogenous refractory particles can also be present, as with the other nonferrous alloy systems. Oxide inclusions in zinc are somewhat limited because...
Image
Published: 01 December 2008
Fig. 13 Dross Boss unit with 70 kg (160 lb) of hot dross capacity serving a well on a reverberatory melter. The average recovery of metallics is +50% on the weight of dross and flux charged, and the recovered metal is returned in molten form to the well. More
Book Chapter

By Paul T. Vianco
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001401
EISBN: 978-1-62708-173-3
... on process parameters, which can be divided into three groups: the fluxing operation, solder wave properties, and process schedule. It provides information on various solder defects. printed circuit boards solder defects surface-mount technology through-hole technology wave soldering WAVE...
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
... temperatures. The high heat flux generated by direct radiation at the bath surface is typically much greater than conductive and natural convective forces, which distribute the heat through the bath. In turn, surface oxidation and dross formation ensue. There are two types of gas reverberatory furnace...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005193
EISBN: 978-1-62708-187-0
...: Exogenous: those derived from external causes Indigenous: those that are native, innate, or inherent in the molten metal treatment process Exogenous Inclusions Slag, dross, entrapped mold materials, and refractories are examples of inclusions that would be classified as exogenous. In most cases...
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
... sorting, such as hand sorting, air classification, magnetic separation, eddy-current separation, heavy-media separation, and sensor-based sorting. The article also describes thermal processing, refining and casting, and dross processing of aluminum. It provides information on reverberatory and electric...
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
... in controlling dross formation and removing oxides from aluminum melts and melting furances. The basic types of aluminum fluxes are: Cover fluxes designed to barrier “blanket” on the surface of molten aluminum Drossing fluxes with wetting action that promotes coalescence of aluminum Melt-cleaning...
Book Chapter

By David V. Neff
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005353
EISBN: 978-1-62708-187-0
... Abstract Gas porosity is a major factor in the quality and reliability of castings. The major cause of gas porosity in castings is the evolution of dissolved gases from melting and dross or slag containing gas porosity. Degassing is the process of removing these gases. This article describes...
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
... fluidity and part integrity. Good casting techniques direct oxides into the gate and riser system. Therefore, a more conservative approach would be to process gating separately with the fluxing procedure outlined below. Extra cleaning is required as the level of SiC in the alloy increases, since even low...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005351
EISBN: 978-1-62708-187-0
... exceeds the liquid solubility level of the element, which is often quite low (<0.02% for manganese, silicon, chromium, and nickel in die casting alloys). The intermetallic particles can be lighter than the base alloy and therefore rise to the top dross. Fluxing salt inclusions and exogenous refractory...
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
... processes such as demagging, degassing, filtering, composition adjustment, and fluxing are important to the reuse of often heavily contaminated scrap in the production of new products. See the article “Nonferrous Molten Metal Processes” in Casting, Volume 15 of ASM Handbook for a comprehensive overview...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001272
EISBN: 978-1-62708-170-2
... content of the fluxes reacts with the aluminum in the bath, producing a surface film of dross, oxide, and chloride on the bath surface. Coating Thickness In addition to base metal chemistry and surface profile, the thickness of coatings applied by hot dipping is primarily a function...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001273
EISBN: 978-1-62708-170-2
... to casting, the workpiece must be scrupulously prepared by various cleaning, fluxing, and tinning steps. Babbitting of bearing shells can be accomplished by three methods, namely, static babbitting, centrifugal casting, and metal spray babbitting. babbitting bearing shells bond quality centrifugal...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005247
EISBN: 978-1-62708-187-0
... (tons) lose the effectiveness of phosphorus refinement over a matter of many hours and even days, whereas small melts (a few kilograms) can lose it within 4 to 5 h. The AlP 3 clusters are easily floated into the dross and removed during fluxing and degassing, especially when “active” (de-wetting...