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Topic: Atomisation

In the News (Mon 28 May 12)

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	Powder Metallurgy — Powder Processes (Solid State Reduction, Electrolysis, Atomisation, Mechanical C
		With the REP process the avoidance of contact with refractory is a potent means of reducing the number of non-metallic inclusions in the powder, and in components manufactured from the powder.
		Atomisation is particularly useful for the production of alloys in powder form, since the constituents metals are fully alloyed in the molten state.
		In this process, granular material, which may be coarsely atomised powder, is fed in a stream of gas under pressure through a venturi and is cooled and thereby embrittled by the adiabatic expansion of the gas before impinging on a target on which the granules shatter.
	www.azom.com /details.asp?ArticleID=1689 (1167 words)

	NETRAMM
		The influence of pressure and nozzle diameter on an average size of a powder and output of atomisation is shown.
		The results of atomisation of a magnesium, bronze, tin, aluminum and alloys (fractional composition, contents of oxygen, plasticity and specific surface) are reduced.
		The results of investigation of influence of a gas pressure in atomisation chamber (at invariable pressure of a melt) on fractional composition of a powder is reduced.
	www.netramm.com /eng/lit (1065 words)

	Pendred Humidification&Water Systems
		Filtered and de-mineralised water is pressurised (130psi) and periodically atomised into small droplets (8-15 microns) directly into the display area of the food counter.
		In fact, any extra humidity added by the Atomisation system is lost into the atmosphere around the open display area of the cabinet, or removed as the air passes by the refrigeration coils.
		Atomisation is not dependent on refrigeration 'Airflow; or refrigeration fans to operate effectively.
	www.pendred.com /atom.htm (628 words)

	The IRC in Materials Processing
		The Atomisation and Spray Forming research group was set up originally in 1990-1991 as part of the IRC's activities on Plasma Melting.
		Central to this re-organisation has been the de-coupling of the equipment used for plasma melting and spray forming and the procurement of a dedicated vacuum induction melting facility for atomisation and spray forming.
		Work on atomisation and spray forming within the IRC has developed from the technological, metallurgical and economic benefits which accrue from the direct conversion of liquid metal into a powder or near net-shaped preform, and from the unique ability to produce novel, highly alloyed materials which are free from chemical and microstructural inhomogeneity.
	www.irc.bham.ac.uk /theme1/atomisation (315 words)

	The EuroFlam Consortium - UWC projects list
		Atomisers studied include plain-orifice, pressure-swirl and various types of twin-fluid, and projects include work on primary and secondary atomisation, impingement, etc..
		Atomisation via cloud chambers is a novel area of research, and a optical cloud chamber designed for generating fuel mists has been designed and calibrated.
		Transient and steady atomisation processes are considered, including breakup of liquid jets and ligaments, and single or multiple droplets.
	www.euroflam.net /uwc-projects-bowen.html (685 words)

	Atomising Systems Limited home page
		A major area of expertise is water atomisation, with experience of atomising rates from 3 to 500 kg.min and melt weights from 200 gms to 80 tonnes.
		A small scale water atomiser and a small scale water quenched gas atomiser (30kg batches), whilst a larger water atomiser is also to be installed during 2005 (also with a 50kg and 150kg batch capability).
		Atomising Systems Ltd (“ASL”) is pleased to announce that it has signed a Manufacturing Agreement with pSiMedica Ltd, the UK operating subsidiary of Australia-based global nanotechnology company pSivida Limited, for the manufacture of the process intermediate for its lead brachytherapy (cancer treatment) product 32-P BioSiliconTM (“BrachySil™”) at ASL’s Sheffield manufacturing facility.
	www.atomising.co.uk (479 words)

	[No title]
		The potential advantages of effervescent atomisation over conventional atomisers are: smaller droplets obtainable with a given injection pressure, lower gas flow-rates, larger exit orifice, lower droplet velocity and efficient atomisation of even viscous feeds (1).
		In effervescent atomisation the atomisation gas is injected into the liquid to be atomised and a two-phase mixture is created.
		The atomisation gas has two separate functions: As the feed passes through the exit orifice, the gas takes up space, so that the size of droplet forming liquid ligaments and shreds are reduced.
	www.dfh.dk /phd/forskningensdag/2004/p13.doc (455 words)

	Wolfson Electrostatics - Hazards
		The efficient atomisation of liquids into a uniformly dispersed aerosol and the application of surface coatings of controlled thickness can be achieved using electrostatic techniques.
		Electrostatic atomisation is achieved by directing the liquid to be sprayed through an electrified applicator - this may be a nozzle, array of tubes, blade or other geometry suited to the spraying requirements and conditions.
		As the charged liquid leaves the applicator it is dispersed by the electric field (which is established between the emerging liquid and the work-piece or a counter electrode).
	www.soton.ac.uk /~wolfson/applications/apps-electroatom.shtml (443 words)

	Danmarks Farmaceutiske Højskole: Stipendier
		Effervescent atomisation is a relatively new atomisation technique, which has been developed for effective atomisation of liquid fuel for jet and diesel engines.
		The results so far have shown that effervescent atomisation is superior to pneumatic nozzle atomizers with regard to uniformity and small droplet size of the aerosol of even viscous liquids and primarily with regard to a very low air-to-liquid mass ratio.
		The aim of the present project is to investigate the potential of effervescent atomisation in the microencapsulation of particulate solids.
	www.dfh.dk /dra/Microencapsulation.htm (558 words)

	Prilling - Multiple Core Encapsulation
		For this purpose 2-fluid- and pressure-nozzles were applied as atomisers, taking the Particle Size Distribution (PSD hereafter) to as coarse as "95% between 400 and 2000 microns" equal to an average particle size (d50 hereafter) of 1200 microns or 1.2 mm.
		Figure 1a shows a newly developed and patented atomiser wheel (4) of the medium-slow type with hundreds of big, not filled holes operating in the laminar range and producing the typical narrow droplet size distribution.
		Beyond the atomisation device discussed previously, the most important part is a process chamber to confine the droplets and the process gas.
	www.niroinc.com /html/chemical/cprilling.html (3921 words)

	Dryers
		The solutions and slurries in fine atomised droplets are pumped in a stream of hot air inside a spray chamber.This atomised spray instantly vapourises the water or the solvent present in the liquid feed and immediately forms the dry powder.
		Rotary Atomisation : A wheel or disc rotating at high speed is used for atomising the liquid feed.
		This technique is used in nozzle atomisation spray dryers.
	www.compengg.com /HTML/dryers.htm (1152 words)

	BUNKERWORLD -- Viscosity: Atomisation -- Bunkers, Marine Fuel, Bunkering, Bunker Prices, BunkerNews, Suppliers, ...
		Residual Fuels invariably have to be heated to reduce the viscosity to that required for atomisation.
		For diesel engines the injection viscosity is usually in the range 8-27 cSt, whilst for a steam plant the atomisation viscosity is usually in the range 15-65 cSt.
		The viscosity/temperature relationship for any particular fuel depends on the crude oil source and the refinery processes employed during manufacture, estimations from charts cannot be considered as precise.
	www.bunkerworld.com /technical/tech_viscosity_4.htm (194 words)

	News Release (Site not responding. Last check: 2007-11-05)
		The development stems from the simple observation that gas exit velocities in the supersonic gas nozzles used in atomisation increases substantially as the stagnation temperature in the atomisation die increases.
		In addition to the generation of high temperature/pressure gas the atomisation nozzles that mix the high velocity gas with the melt stream must safely withstand the rapid and cyclic temperature increases experienced during batch atomisation and nozzles must be dimensional stable throughout an atomisation cycle.
		Also the greater heat loads induced in the atomisation plant have to be dissipated including means of cooling powders on-line.
	www.psiltd.co.uk /dtifund.htm (411 words)

	EC90 Electrically Heated Atomisation Cell - Thermo Electron Corporation
		Electrical heating instead of flame heating means you can optimise the atomisation temperature for each vapor element to get the highest sensitivity and the best precision.
		The EC90 is an electrically heated atomisation cell for flameless vapor generation AAS.
		The EC90 must be used with either the VP90 or FI90 accessory and is suitable for all hydride forming elements.
	www.thermo.com /com/cda/product/detail/0,1055,22843,00.html (116 words)

	[No title] (Site not responding. Last check: 2007-11-05)
		ULTRASONIC ATOMISATION An ultrasonic fog or atomisation cloud is usually produced by a piezoelectric operating in thickness mode immersed in a liquid facing a free surface.
		Beyond a power threshold, these effects become finite amplitude and the waves are elongated at the crests emitting atomised droplets with the resultant formation of the atomisation cloud [2].
		Operating frequencies are in the range 0.4 to 3 MHz and atomisation performance is typically quite low (less than 0.1 g/s or 360 g/hour) [1].
	www.ctech.ac.za /conf/due/documents/Bmortimer.doc (562 words)

	DeVilbiss Compact Spray Guns
		Extensive research and development incorporating the latest computational fluid dynamics produced working prototypes that were evaluated by spraygun users and leading paint and coatings companies throughout the world.
		To provide outstanding coatings’ atomisation for handling all types of solvent and waterborne materials.
		This provides considerable paint savings whilst producing the highest levels of atomisation, high speed application with flow rates of up to 600cc/min or more.
	www.syntema.co.uk /devilbiss_compact.htm (328 words)

	Validation of An Enhanced Liquid Sheet Atomisation Model Against Quantitative Laser Diagnostic Measurements
		The new spray model incorporates the effect of spray swirl by preserving the angular velocity component of droplets, which are injected in a circle, and also includes a transi- tion between the initial solid cone pre-spray and the ensuing hollow cone spray.
		Laser-induced fluorescence, Mie scattering and Particle Image Velocimetry were used to image a high-pressure fuel swirl spray at room tempera- ture and pressure and results were compared against modelling predictions in order to evaluate the code.s ability to capture the resulting atomisation and mixing phenomena.
		Both visual and quantitative comparisons were made to assess the predictive capabilities of the model.
	me.engin.umich.edu /autolab/Publications/P2002_02.htm (189 words)

	ABINIT. Tutorial #1
		1.5.a The atomisation energy is the energy needed to separate a molecule in its constiuent atoms, each being neutral.
		The atomisation energy will be the difference between the total energy of H
		The bond length is awful (nearly 10% off), and the atomisation energy is a bit too low, 5 % off.
	www.abinit.org /Infos_v5.0/tutorial/lesson_1.html (3896 words)

	Condair Dual humidifiers combine the benefits of, atomisation and evaporation for successful results.
		Condair Dual humidifiers combine the benefits of, atomisation and evaporation for successful results.
		The Condair Dual humidifiers combine the benefits of two humidification principles, atomisation and evaporation.
		Incorporating a silver ion based water sterilisation technique and ceramic evaporation elements for efficient, hygienic operation, Condair Dual humidifiers are now a popular choice for commercial and industrial buildings around the UK, from financial institutions to offices, hospitals to manufacturing plants.
	www.humideco.co.uk /news.htm (287 words)

	Atomisation Issues - NASIOC
		It seems to me as if the majority of the spray hits the opposite wall to the nozzle, then trickles down the pipe walls and pools in my FMIC piping.
		It just seems like an awful lot of fluid coming out of the 1 nozzle in such a small space (ie 3" piping) when I did a demo with the pipe off the car.
		What I saw was the spray coming out of the nozzle was like a jet just spraying the walls inside the pipe.
	forums.nasioc.com /forums/showthread.php?p=15628855 (1145 words)

	More about combustion
		During atomisation, the size of the droplets can be decreased by:
		In the coke combustion stage, the ignition temperature is lowered, resulting in faster and prolonged combustion.
		Bycosin´s additives contain dispersant agents and surface active ingredients that will affect the physical properties of the fuel in such a way as to improve its atomisation.
	www.bycosin.se /Comb_more.htm (1684 words)

	ANI Suction Feed HVLP Spray Guns - Made in Italy - Gravity Feed HVLP Spray Gun
		The elevated degree of atomisation and the large size of the fan-
		holes in the atomisation cap, have permitted air consumption to be reduced while providing extremely high atomisation for today’s latest-
		F1 CAR HPS: new high atomisation system developed by A.N.I. whereby transfer efficiency equal or superior to the HVLP and LVLP
	www.bloomertool.com /HVLP-Spray-Guns-F1.html (606 words)

	Boiler Forum and Steam Forum - HSD ATOMISATION
		[size=6]PRESENTLY FOR OUR STEAM BOILERS,In burners for High speed diesel(hsd)atomisation,we are using air at 5.5 kg/cm2,we want to use steam for atomising HSD,(Steam at 8.0 kg/cm2 and 280 degree centigrade),is it possible,is it safe.what problems are expected.?
		However, it is advisable to contact the Burner manufacturer for the best advise.
		Please check cost of steam & air atomizing.
	www.firecad.net /boilerforum/topic.asp?TOPIC_ID=59 (247 words)

	bidorbuy - bidorbuy 1778271 - ** Ultrasonic atomisation machine / mist maker / mini fog generator - Pretoria / Tshwane ... (Site not responding. Last check: 2007-11-05)
		bidorbuy - bidorbuy 1778271 - Ultrasonic atomisation** machine / mist maker / mini fog generator - Pretoria / Tshwane - South Africa
		Ultrasonic atomisation** machine / mist maker / mini fog generator
		Item Description : Ultrasonic atomisation** machine / mist maker / mini fog generator
	www.bidorbuy.co.za /jsp/item/Item.jsp?Trade_TradeId=1778271 (193 words)

	(WO/1995/013864) A PROCESS AND A SPRAY DRYING APPARATUS FOR PRODUCING AN AGGLOMERATED POWDER (Site not responding. Last check: 2007-11-05)
		An apparatus suitable for carrying out the process has means for performing the separation and recycling of the fine particles as specified.
		Le liquide à sécher par atomisation dans ladite chambre est introduit par atomisation dans un flux central descendant de gaz de séchage, et le gaz de séchage usé est évacué, conjointement avec des particules fines entraînées, en des points non centraux (5, 11) situés dans la partie supérieure de la chambre de séchage.
		Les particules fines sont recyclées dans la chambre de séchage par injection pneumatique en un point situé dans la partie inférieure de la chambre de séchage, lesdites particules étant injectées selon une ou plusieurs directions formant un angle de 0 à 90° avec l'axe central vertical de la chambre.
	www.wipo.int /pctdb/en/wo.jsp?WO=1995/13864 (261 words)

	(WO/2002/018058) NOZZLE DEVICE AND NOZZLE FOR ATOMISATION AND/OR FILTRATION AND METHODS FOR USING THE SAME (Site not responding. Last check: 2007-11-05)
		Subscribe to receive e-mails of news and updates on WIPO's activities regarding patents and the PCT
		Nozzle device and nozzle for atomisation and/or filtration as well as methods for using the same.
		The invention is further related to a nozzle part for filtration as well as means and methods to facilitate atomisation and filtration.
	www.wipo.int /pctdb/en/wo.jsp?WO=2002/018058 (323 words)

	IngentaConnect Ultrasonic atomisation: A novel technique for surface coatings (Site not responding. Last check: 2007-11-05)
		In this work, ultrasonic atomisation as a possible spray coating on a moving surface has been studied.
		Unter der experimentellen Methode, die in diesen Versuchen verwendet wurde, wurde eine Tinte senkrecht nach unten auf ein Papier gesprüht, das von Seite zu Seite bewegt wurde.
		Wir stellten fest, daß der Anteil der besprühten Oberfläche mit dem Abstand des Ultraschall-Atomisators von der Papieroberfläche, der Vibrationsamplitude des Atomisators und der linearen Geschwindigkeit des Papieres zunahm.
	www.ingentaconnect.com /content/occa/ct/2005/00000088/00000003/art00006 (425 words)

	Atomisation technology for microfine powders.(Workshop)(Brief Article) Finishing - Find Articles
		Atomisation technology for microfine powders.(Workshop)(Brief Article) Finishing - Find Articles
		Read the full article with a Free Trial of HighBeam Research »
		Collaboration between Hosokawa Micron Ltd and Novel Technical Solutions Ltd has led to the development of atomisation technology which revolutionises the production of microfine powders.
	www.findarticles.com /p/articles/mi_hb4307/is_200307/ai_n15018315 (170 words)

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