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Topic: Dross


In the News (Tue 22 Dec 09)

  
  Lead Melting Equipment, Lead Melting Furnaces, Exporter, Supplier of Lead Led Dross, Lead Melting Operation   (Site not responding. Last check: 2007-10-28)
Dross is a mass of solid impurities floating on a molten metal bath.
Dross is distinguished from slag, which is a (viscous) liquid floating on the alloy, by being solid.
Drossing: During drossing operations, dross is skimmed to the rim of the kettle and manually shoveled or "spooned" into a container.
www.gravitaexim.com /Lead-Metal/lead-dross.html   (437 words)

  
  Process for the preparation of calcium aluminates from aluminum dross residues - Patent 5407459
Such dross is normally treated either by a plasma or in a conventional furnace with a salt mixture, to remove recoverable aluminum metal, leaving a dross residue having reduced aluminum content.
The actual way in which the aluminum is removed from the dross affects the nature and composition of the dross residue and, to a certain extent, the way in which the dross residues should be treated before it is used in the process of the present invention.
A more conventional way of treating aluminum dross to remove contained aluminum is to heat the dross in a conventional furnace with a salt mixture which reduces the surface tension of the molten aluminum and causes the aluminum droplets to coalesce.
www.freepatentsonline.com /5407459.html   (4699 words)

  
 Method of processing hot dross of aluminum resulting from an aluminum smelting process and a deoxidant obtained from ...
Thereafter, the hot dross of aluminum is subject to mechanical stirring so that molten aluminum residing in the hot dross in the form of droplets covered with the low protective oxide layer is removed the oxide layer therefrom and divided from the removed low protective oxide layer.
Further, since the hot dross after the aluminum content is removed is in a powder state and so has a large amount of surface area, where the hot dross is cooled for a long period of time in the atmosphere, metal aluminum residing in the hot dross reacts with oxygen and nitrogen.
Since the hot dross 4 is gradually compressed by application of the impact load, the hammer mechanism 11 has a pair of hydraulic cylinders 14 to adjust the position of the hammer head 12 in the vertical direction according to the compression of the hot dross 5 in the container 2.
www.freepatentsonline.com /5439501.html   (5608 words)

  
 Dross - Wikipedia, the free encyclopedia
Dross is a mass of solid impurities floating on a molten metal bath.
With tin and lead the dross can also be removed by adding sodium hydroxide pellets, which dissolve the oxides and form a slag.
Dross is distinguished from slag, which is a (viscous) liquid floating on the alloy, by being solid.
en.wikipedia.org /wiki/Dross   (281 words)

  
 Dross Interview 2
Dross: We went above and beyond the norm because we are seeking to establish a precedent.
Dross: Some of the songs on the CD are pretty old and others are relatively new.
Dross: I am a friend with Mike the owner of Black Plague Records and he suggested that I contact them about distributing the CD in Japan.
www.sothis.us /Int_Dross02.html   (2090 words)

  
 Dross: The Thinking Man's Pop-Rock, straight from Austin, Texas
Dross: The Thinking Man's Pop-Rock, straight from Austin, Texas
Dross was featured in the Austin American Statesman and on Indie-Music.com.
Check out the Press page for more articles and reviews.
www.drossrocks.com   (229 words)

  
 Alcoa: Environment: New Recycling Plant Reduces Landfilled Waste
Dross is the accumulated scum that floats on the surface of aluminum that is being melted down from scrap.
Dross dust from the fume and dust collection system baghouse is currently being evaluated for use in the ceramics industry.
With the new recycling plant, 60% of the dross is recovered as metal pure enough to be used onsite for the manufacture of aluminum ingot.
alcoa.com /global/en/environment/initiatives/hot_dross.asp?...   (534 words)

  
 Advanced Manufacturing - November 2001 - Case Study   (Site not responding. Last check: 2007-10-28)
Beyond the demanding physical requirements of dross skimming, there is a tedious and repetitive nature about the job, which can cause a manual operator's pace to slow, and for the quality of their work to become inconsistent by the end of their shift.
Dross pot replacement requires a temporary shut down of the robot because the operator must enter the robot's work envelope to remove the full dross pot and replace it with an empty one.
Dross viscosity and the amount of dross on the surface of the zinc bath vary from day-to-day.
www.advancedmanufacturing.com /November01/appliedtech.htm   (1117 words)

  
 ESAB Helpful Article: Plasma Cut Quality Dross Problems
Dross is re-solidified oxidized molten metal that is not fully ejected from the kerf during cutting.
Dross may form as a thick bubbly accumulation along the bottom edge of the plate (low speed dross), a small hard bead of uncut material (high speed dross) or a light coating along the top surface of the plate (top spatter).
Dross formation is dependent on many process variables including torch travel speed, standoff distance, amperage, voltage and consumable condition.
www.esabcutting.com /service/esab_helpful_articles/017.asp   (509 words)

  
 Case Study - FANUC Robotics Dross Removal - Robotics Online   (Site not responding. Last check: 2007-10-28)
Prior to robotic dross skimming, DNN Galvanizing had annually rotated employees through the task of skimming the dross (metal oxides) that form on the 6 foot by 13 foot surface of the zinc galvanizing bath through which they dip more than 147,000 lbs.
Dross skimming requires an operator to manipulate a skimmer (a large 'spoon' with holes in it attached to a ten foot long handle) across the entire surface of the zinc bath in multiple passes.
In a manner of speaking, the dross removal robot is skimming up more profits for them and their company by performing the most labor intensive, back breaking and monotonous job in their facility.
www.roboticsonline.com /public/articles/index.cfm?cat=289   (1020 words)

  
 Dross removal system and method patent invention   (Site not responding. Last check: 2007-10-28)
During the cutting process, which commonly occurs in-line after the continuous caster, there is a molten metal residue or dross formed at the point where the oxygen torch flame exits the steel structure.
A stream of oxygen is directed at the molten dross which causes the dross to fall off the steel structure.
Dross 18 forms on both sides of the exit of the cut.
www.freshpatents.com /Dross-removal-system-and-method-dt20051006ptan20050218567.php   (1266 words)

  
 SoundClick artist: Dross - industrial metal / grindcore
Dross consists of Daniel Euphrat on guitar, bass, keyboard, and synth, Greg Euphrat on vocals, synth, and very occasionally guitar.
Dross is the scum that forms on the surface of molten metal.
Dross formed in 2003 from two members of the unsigned death metal influenced hardcore band Entropy (formerly Apocalyptic Omen).
www.soundclick.com /dross   (389 words)

  
 Bar Solder by P. Kay Metal
By eliminating dross, MS2™ molten solder surfactant allows manufacturers to reduce their solder usage by as much as 70%, depending on production volume, resulting in significant cost savings.
Dross is formed when molten solder comes into contact with oxygen.
Dross consists of metal oxides plus otherwise good solder metal that is bound up with the oxides and is thus unavailable for soldering.
www.pkaymetal.com /dross.php4   (336 words)

  
 Assembly Innovations: Surfactant Eliminates Dross From Wave Soldering - Archives - ASSEMBLY   (Site not responding. Last check: 2007-10-28)
Dross is the oxide scum that forms on the surface of molten solder.
How much dross is generated during production depends on the temperature and agitation of the solder bath.
To ensure a quality wave-soldering process, dross must be removed periodically from the surface of the molten solder.
www.assemblymag.com /CDA/Archives/a8fbc21bd16c9010VgnVCM100000f932a8c0____   (620 words)

  
 [No title]
The dross formation is related to the internal defects such as cracking and porosity that occur during the solidification of aluminum sow.
Dross formation is much less in specimens with water spray cooling than those with air cooling.
Dross formation as a function of the bulk concentration of magnesium in: (a) 9-in.
www.ms.ornl.gov /programs/mplus/projects/reducingdross.doc   (1059 words)

  
 Science Devotions: Purity: Purified by Fire : the Dross   (Site not responding. Last check: 2007-10-28)
Ezekiel 22:17-22 The word of the Lord came to me, saying, "Son of man, the house of Israel has become dross to Me. They are all bronze, tin, iron, and lead, in the midst of a furnace.
The coal is oxidized to carbon monoxide, which then removes oxygen from the metal ore. As the gaseous by-products including carbon dioxide, nitrogen dioxide, and water rise from the furnace, the pure metal sinks to the bottom.
Other impurities react with the flux or coal forming slag or dross, which floats above the molten metal and is removed.
sd.gospelcom.net /043.html   (579 words)

  
 Dross - Austin Live Music - MusicAustin - Music Austin   (Site not responding. Last check: 2007-10-28)
Dross is mainly Michael Daross and a varying sized band that plays smart, jazzy, anti-establishment pop-rock for the sophisticated listener.
Dross' debut album is The Age of Ignorance.
Dross appears in venues such as Arturo's Cafe, The Carousel Lounge, and Spider House Cafe.
www.musicaustin.com /jazz/dross.html   (1615 words)

  
 Centricut Training Lessons   (Site not responding. Last check: 2007-10-28)
Between the extremes of high and low speed dross is a window of dross free or minimum dross cutting.
Many operators have the tendency to slow the machine down at the first appearance of dross, but often an increase in speed is necessary.
The second method is to watch the arc (through the appropriate welding lens!) during the cut and dynamically change the speed to produce the optimum arc characteristics.
www.centricut.com /New_Lessons/lessons_4.html   (1044 words)

  
 Southpinellas: Hotelier Dross was drawn to people
Dross, who also managed the McCarthy and Princess Martha hotels in downtown St. Petersburg and the Don CeSar Beach Resort and Spa in St. Pete Beach, died Tuesday (Jan. 6, 2004) at Twin Lakes Nursing Center in Burlington, N.C. He suffered from Parkinson's and Alzheimer's diseases.
Dross said in the twilight of his long career.
Dross came to the St. Petersburg area to take over the Tides, which was built in 1936.
www.sptimes.com /2004/01/18/Southpinellas/Hotelier_Dross_was_dr.shtml   (621 words)

  
 Lead: Secondary Lead Smelter eTool: Refining and Casting - Drossing
During drossing operations, dross is skimmed to the rim of the kettle and manually shoveled or "spooned" into a container.
Use a drossing shovel, which allows molten lead to drain prior to removal of dross.
As the employee skims dross (oxide and other impurities) from the kettle, the increasing red bar indicates that the local exhaust ventilation is inadequate to effectively capture lead dust generated during the transfer of dross from the kettle to the ventilated dross receiving vessel.
www.osha.gov /SLTC/etools/leadsmelter/refiningcasting/drossing.html   (396 words)

  
 Solder Saver--New Solder Recovery Tool Cuts Wave Solder Cost in Half   (Site not responding. Last check: 2007-10-28)
The removal of dross from solder pots has predominately been performed in an antiquated manual method of a slotted spoon.
The use of chemical additives to lower the amount of dross in solder pots has been shown to be effective.
The efficient task of solder dross removal, and solder reclamation is addressed with the compact, low cost Solder Saver.
prweb.com /releases/solder/recovery/prweb454236.htm   (607 words)

  
 FAQS
Dross se levanta todos los días a las 11 de la mañana y por lo general, desayuna en la cama.
Dross no está contento con su estilo de vida porque no es un conformista de mierda: él quiere hacer todavía menos.
Dross está a punto de terminar una carrera en el turno de la noche de Comunicación Social.
www.dross.com.ar /FAQS.htm   (1441 words)

  
 Alcoa: About Alcoa: Sustainability & Alcoa: Sustainability Links: Case Studies: Dross Processing System Provides ...
Dross consists of impurities and entrapped aluminum that rise to the surface when used aluminum is melted for recycling.
To eliminate the inefficiencies in the process—reheating the dross and transporting it—Tennessee Operations designed and built an onsite dross processing facility in 2002.
In addition, the change to more frequent skimming of the dross has resulted in a reduction of dross generated and an increase in the amount of aluminum recovered.
www.alcoa.com /global/en/about_alcoa/sustainability/case_studies/2005/Dross_Recycling.asp   (265 words)

  
 Solder dross Inhibitors - Interflux USA, Inc.
The anti-dross#7 can also be used as a blanket on the surface of the solder pot to prevent dross formation.
Interflux SPC is a unique solder pot cover that fuses at normal soldering temperatures into a formable material which acts as an air seal and inhibits dross formation.
It's useful lifespan is 80 hrs at 500º F and can be removed as a continuous film at elevated temperatures.
www.interfluxusa.com /products_3.html   (138 words)

  
 Dross Collection with Duty of Care by Warton Metals Limited - Manufacturers and Suppliers of Solders, Solderpastes, ...
Telephone Customer Services for the quantity of dross buckets you require and they will arrange for them to be shipped out to you.
We hold all the details on our central database, which is open to inspection by the regulatory authorities to help you meet your legal obligations.
By completing a Duty of Care transfer note it ensures solder dross is returned in line with current legislation.
www.warton-metals.co.uk /dross-collection.html   (360 words)

  
 Plasma Arc Cutting - Cut Quality Problems | Centricut Training Articles   (Site not responding. Last check: 2007-10-28)
DROSS - Many fabrication shops spend a lot of time and money grinding, chipping, and sanding parts that were cut on the plasma machine to remove dross.
The window varies with plasma gas used: For example, nitrogen and air plasma gasses have a relatively narrow dross free window on carbon steels while oxygen plasma has a wider dross free window.
With nitrogen or argon/hydrogen, a slight trailing arc is best, and with oxygen plasma gas, the best cut speed is one that gives you a slight leading arc.
www.centricut.com /TA_CutQualityProblems_2004.htm   (1141 words)

  
 dross. The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.
Waste or impure matter: discarded the dross after recycling the wood pulp.
The scum that forms on the surface of molten metal as a result of oxidation.
Worthless, commonplace, or trivial matter: “He was wide-awake and his mind worked clearly, purged of all dross” (Vladimir Nabokov).
www.bartleby.com /61/84/D0398400.html   (110 words)

  
 Work instructions for Anti-Dross #7
Before starting this procedure make sure your air exhaust is in good working condition.
- Collect the dross on one side or corner of the solder bath.
- Sprinkle 2 to 3 tablespoons of the anti-dross over the dross and wait a couple of minutes for the material to melt.
www.interfluxusa.com /Technical/WI-Anti-Dross.htm   (320 words)

  
 Definition of dross - Merriam-Webster Online Dictionary
Learn more about "dross" and related topics at Britannica.com
Find more about "dross" instantly with Live Search
See a map of "dross" in the Visual Thesaurus
www.m-w.com /dictionary/dross   (56 words)

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