Fluidizing media for bulk powder handling and …

1 The high-strength cleanableeasily fabricated porous metal sheetfor all Fluidizing applicationsThe high-strength cleanableeasily fabricated porous metal sheetfor all Fluidizing applicationsCopyright 1999 MKIAll Rights ReservedFluidizing mediafor bulk powder handling and processingFluidizing mediafor bulk powder handling and processingLFMTMand HFMTM controlled permeabilitymedia are constructed of multiple layers of carefullyselected stainless steel wire mesh, laminated byprecision sintering (diffusion bonding ) and resultant monolithic structure is permanently bondedand has highly uniform flow characteristics. Dynaporelaminates are ideal for even flow distribution of gases influidizing and aeration constructed of 100% AISI type 316 stainless steel. Othertemperature and corrosion resisting alloys are availableon special request. Custom laminates offering enhancedmechanical strength are also are easily sheared,formed, punched, welded andcleaned using standard equipment and laminates are available from stock in convenient 24 x 48 and 36 x 36 sheets.

2 Larger TIG butt-welded sizes are also available. MKI, of course,offers custom fabrication are abrasion and punctureresistant and will not chip, flakeor shed fibers. Depending upon load, Dynapore canwithstand continuous operating temperatures up to1000 F with intermittent spikes of 1200 F. The abrasion, corrosion, and temperature resisting propertiesof Dynapore media are superior to that of polyester,metal felts, or sintered powder and HFM air flow ratings and pressure drop curves are presented on the adjacent page. LFM 3-layer media rangein air flow from 5 to 25 scfm /sf @ 2 in. water columnpressure drop. HFM 2-layer media range from 50 to 400scfm/sf @ 2 in. water column. Custom permeabilities areavailable on special SILOS DRYERS HOPPERS REACTORS AIR-GRAVITY CONVEYORS LIME CEMENT FLY ASH GYPSUM ALUMINA TEREPHTHALIC ACIDD ynaporeDynaporeDynaporeDynaporeDynaporeD ynaporeDynaporeDynaporeDynaporeDynaporeF or more information, request the following Bulletins:401 Mechanical Properties402 Installation Recommendations403 Fluidized Conveyor Truss and Bolt Spacing404 Flow Equations and Permeability ConstantsNO ONE BUT MKI CAN GIVE YOU :Alumina (aluminum oxide) fluidized on Dynaporeflows like FLOWNOMINALSCFM/FT2 @ P THICKNESS2 IN.

3 FLOWNOMINALSCFM/FT2 @ P THICKNESS2 IN. -LAYER LAMINATE (WEIGHT LBS/FT2)2 -LAYER LAMINATE (WEIGHT LBS/FT2)PRESSURE DROP vs AIR FLOW - 3 LAYER DYNAPOREPRESSURE DROP vs AIR FLOW - 2 LAYER DYNAPORE200100 80 60 40 20 10 8 6 4 1 2 1 2 6 10 40 80 200 800 1000 400 100 60 20 8 4 600 2000 4000 RATING POINTHFM-100 HFM-200 HFM-400 UPSTREAM CONDITIONS1 ATM. 70 FHFM-50200100 80 60 40 20 10 8 6 4 1 2 2 6 10 40 80 200 800 1000 800 400 100 60 20 8 4 1 LFM-10 LFM-25 LFM-5 UPSTREAM CONDITIONS1 ATM. 70 FRATING POINT P, PRESSURE DROP, in. water P, PRESSURE DROP, in. waterPA RTNUMBERMEDIUMTYPEPA RTNUMBERMEDIUMTYPEG, AIR FLOW, scfm /ft2G, AIR FLOW, scfm /ft2 LFMLFMHFMHFMThe air flow rating values for 3- layer LFM and 2- layer HFM Dynapore laminates arepresented in the following tables. LFM laminates cover the air flow range from 5 to 25scfm/ft2 @ 2 in.

4 Water column pressure drop. HFM laminates flow from 50 to 400 cfm/ft2@ 2 in. water column. In general, HFM media are lower in weight and thickness, and havelarger mean pore FLOW CHARACTERISTICSAIR FLOW CHARACTERISTICSBULK POWDERS FLOW LIKE LIQUIDS ONSTAINLESS STEEL Fluidizing MEDIAMARTIN KURZ & CO., Liberty AvenueMineola, New York USA 11501-3580 Tel: 516-746-7000 Fax: 516-746-1818 INTERNET ADDRESS: NOTE: MKI makes no warranties, express or implied, regarding the information herein, or the products described suitability must be determined by the end user of the products prior to flowuniformityengineeredporous mediaapplication versatilityDynaporeis easy to clean because ordinary water anddetergent, high pressure steam or chemical methodsmay be used to remove most oil and be easily fabricated, punched, sheared,or is excellent using TIG or otherstandard available from stock,in seamless 24 x 48 and 36 x 36 temperature diffusion bonding and precisioncalendering create the precise and uniform air flowproperties of are not limited to LFM and HFMconstruction.

5 By careful mesh selection and sequencing,a porous metal medium can be engineered to fit almostany specification for: pore size; pore density; tortuosity;mechanical strength; permeability; corrosion resistance;and acoustical resistance. Fluidized hoppers,beds and slides Air film conveyors Air bearings Spargers and diffusers Transpiration coolingmedia Flame and sparkarresters Flow restricters Pressure snubbers Acoustical mufflers Propellant surfacetension devices Resin and catalystbeds Filter leaves andcartridges Particle classificationscreens Vacuum forming andmolding media Drying/de -wateringmedia{{{{For extremely fine powders, MKI offers DynaporeParticle Control Fluidizing MediaTM. PCMTM media are available in the same flow ranges asLFM and HFM but with particle barrier meshes asfine as two microns sintered to the downstreamsurface. Consult the factory for more proven product for more than 25 YearsFluidizing media Mechanical PropertiesMEDIAU ltimate TensileYield Strength @Elongation, 2 modulus ofThickness (in)TYPES trength (psi) offset (psi)gauge length (%) elasticity (psi x 106)approximateLFM-540,00028, ,00027, ,00019, ,50014, ,00019, ,00017, ,85011, ,0007, ,9005, ) Approximate weight: LFM lbs/sq.}}}}

6 Lbs/sq. ) Testing in accordance with ASTM A ) All data are approximate or average, and are based on standard AISI T-316 stainless steel ) Specifications are subject to change without ) Designs should reflect the decreasing yield strength of type 316 stainless steel at temperatures over 400oF. Sintered wire mesh laminates Sintered powder metal Sintered fiber metalBulletin No. 401 Martin Kurz & Co., Liberty Avenue Mineola, 11501-3580 Phone: (516) 746-7000 Fax: (516) 746-1818E-mail: Dynapore LFM & HFM Fluidizing media :Generally speaking, Dynapore Fluidizing media can be handled as if they were solid stainless steel may be readily cut to size on a power shear, band saw, or nibbler of proper capacity. These mediamay also be formed using suitable bend radii. (Please consult factory for recommendations). Dynaporemedia may be punched using standard punches and dies.

7 A punch-to-die clearance of 31 2% per side :Welding Dynapore sheets together to make larger pieces can be accomplished readily through butt-welding. After shearing or cutting the media to obtain a clean straight edge, butt the sheet edgestogether on top of a copper plate or bar for support and to serve as a heat sink. TIG weld the joint with aninitial setting of around 32 volts and 45 amps. Use a diameter 2% thoriated Tungsten electrode andT-347 filler wire of to diameter. If cleaning the weld is required, use only a STAINLESSSTEEL wire brush. These media can also be welded using plasma, laser, and electron beam Finishing:Some applications may require passivation or electropolishing of the media . Dynapore media may be finished by either of these chemical finishing processes. However, due to variances in bath compositionsand concentrations, residence times may vary.

8 Always test a small sample or test coupon before proceeding with the production lot. In addition, thorough rinsing is very :Airflow losses must be prevented around the panel edges where the media are clamped between plenumflanges. An appropriate caulking compound should be applied to seal both upper and lower surfaces ofthe media . Where Dynapore media are used to retrofit an existing slide, or in conjunction with anothermedium, shimming may be required if variations in media thicknesses are greater than flange Supply:To provide optimal operating life, the Fluidizing air supply must be of instrument quality, , clean and replacement of the air supply filters, as well as providing moisture free air, will help insure longlife. In addition, thorough cleaning of the plenum prior to installation will prevent immediate plugging,assuming the plenum has been properly and adequately No.

9 402 Martin Kurz & Co., Liberty Avenue Mineola, 11501-3580 Phone: (516) 746-7000 Fax: (516) 746-1818E-mail: applications where the conveyor is subjected to an intermittent load from dropping powder , adeflector plate, cross supports and bolting arrangement, as shown in the sketch, are recommended. The accompanying table gives the support spacing for a range of inside conveyorwidths and air supply No. 4036-- - - TYPSSW1 4- 20 cres. screw selfthreadingCRES. WASHERDYNAPORE1 x 1 x 1/4 STEEL ANGLE OR EQUIVALENTAIR INDEFLECTOR PLATEFOR ABSORBINGIMPACT OF BUCKET DROP2 CROSS SUPPORTSBEYOND SIDE OFINLET CHUTEWELDCEMENT INAAWIDTH W 1 PSIG2 PSIG3 PSIG4 PSIG5 PSIG6 PSIGSPACING OF CROSS SUPPORTS, S , InchesSECTION A-AMartin Kurz & Co., Liberty Avenue Mineola, 11501-3580 Phone: (516) 746-7000 Fax: (516) 746-1818E-mail: RecommendationsFluidizing media Technical DataBulletin No.

10 404 AIR FLOW CHARACTERISTICSThe air flow rating values for the 3-layer and 2-layer Dynapore laminates are presented in the following table. The 3-layerlaminate covers the air flow range from 5 to 25 scfm /ft2at 2 in. water pressure drop. The 2-layer laminate flows from 50to 400 scfm /ft2at 2 in. water pressure FLOW RATINGP ressure drop curves for the 3-layer and the 2-layer laminates are given in the following figures for standard pressure andtemperature air entry conditions. For other conditions, flow equations are provided to facilitate pressure drop DROP VS AIR FLOW - 3-LAYER DYNAPORE3-LAYER LAMINATE (WEIGHT FT.) P, PRESSURE DROP, in. waterG, AIR FLOW, scfm /ft2 AIR @ PTHICKNESSNUMBER2 IN. LAMINATE (WEIGHT FT.)AIR @ PTHICKNESSNUMBER2 IN. Kurz & Co., Liberty Avenue Mineola, 11501-3580 Phone: (516) 746-7000 Fax: (516) 746-1818E-mail: 80 60 40 20 10 8 6 4 1 2 2 6 10 40 80 200 800 1000 800 400 100 60 20 8 4 1 LFM-10 LFM-25 LFM-5 UPSTREAM CONDITIONS1 ATM.