Highly flexible air classifier mill for the processing of soft to medium hard materials. High-speed impact mill combined with single or multi-wheel Turboplex
305 KB – 14 Pages
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PROCESS TECHNOLOGIES FOR TOMORROWSMPOWDER AND PARTICLE PROCESSING ALPINE CLASSIFYING TECHNOLOGY Hosokawa Alpine is a member of the Hosokawa Micron Group, responding to global needs through emphasis on materials science and engineering. The Group is an international provider of equipment and technology for powder and particle processing, plastics processing and confectionery products. The Group maintains facilities for research, engineering, manufacturing and service in each of the world’s major industrial markets. © Hosokawa Alpine 2009. Printed in Germany. HOSOKAWA ALPINE Aktiengesellschaft P.O. Box 10 11 51 86001 Augsburg, Germany Delivery address: Peter-Doerfler-Straße 13 Œ 25 86199 Augsburg, Germany Phone: + 49 821 5906-0 Fax: + 49 821 5906-101 E-mail: mail@alpine.hosokawa.comwww.alpinehosokawa.com Subject to change without notice. All information in this brochure is purely informative and non-binding. Our quotations are authoritative with regard to orders. Sichtertechnologie 02.09/1e
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2 / 3PROCESS TECHNOLOGIES FOR TOMORROWSMWE ARE YOUR COMPETENT PARTNER HOSOKAWA ALPINE ONE COMPANY – TWO BUSINESS DIVISIONS WE ARE YOUR COMPETENT PARTNER POWDER & PARTICLE PROCESSING Formed in 1898, Hosokawa Alpine’s range includes the development, design and manufacture of components and turnkey systems to produce powders, granules and bulk materials for the chemical, pharmaceutical, food, minerals, metals and recycling industries. Whether the task is comminution, classification, dust removal, handling, metering, weighing or packing, you will always find Hosokawa Alpine to be a competent and innovative partner. Hosokawa Alpine has been in business for over 100 years. Regardless of the field, i.e. blown film processing or powder & particle processing, we are traditional trendsetters on the market. The driving force behind refining our technologies is the experience we gain and the challenges we face as market leaders. DIVISIONAL STRUCTURE The name ALPINE stands for competence in all areas of comminution technology. The long years of close cooperation between our engineers and the development departments of our customers have made us leading specialists for powder and particle processing technology around the world. Because our aim is to offer our customers the very best in professional and accomplished advice tailored to their specific branch of industry, our powder and particle processing division is divided into five subdivisions: BLOWN FILM PROCESSING As a specialist for film blowing lines to manufacture thin plastic film, Hosokawa Alpine ranks among the world’s foremost suppliers in this market segment. The vast fund of know-how, the high quality standards, the continuous innovation and high degree of reliability are all reasons for the constant growth of this business division. EVERYTHING FROM ONE SINGLE RESPONSIBLE SOURCE.- P HARMA & F OODThe manufacture of powdery substances for the pharmaceutical industry is a job for specialists. Hosokawa Alpine conforms with international pharma standards and supplies a wide range of products and performance, including special processes for the food industry. Whatever method of size reduction is used, we are the specialists. – CHEMICALS The range of chemical products is just as wide and diverse as are the different demands on the properties of pigments or powders. We supply process-technological solutions for the chemical industry as a single-source partner. Our comprehensive range of products means that we are able to meet a vast number of different require -ments. We also offer competent advice on solutions for basic chemical products and auxiliary products, as well as for toners, paints, pigments, herbicides or fertilisers. – M INERALS & M ETALS We supply complete dry and wet processes with state-of-the-art mills and classifiers for processing mineral raw materials. Our machines and systems for fillers, ceramic raw materials, metallic compounds and alloys all meet the high demands set by our customers. We are not just manufacturers, however, but also competent partners for the engineering and design of complete turnkey systems. – RECYCLING & GRANULATORS We design, build and deliver complete granulator systems to include all necessary system components. Whether the feed material is injection mouldings, sprues, film webs or film edge trims, our granulators are designed for even the most difficult cutting tasks. In addition, we also supply in-line recycling solutions for rubber or cable which are tailored to the individual requirements. – S ERVICE Our service division gives support during the entire lifetime of any Hosokawa Alpine system or machine. Our extensive range of services includes spare parts supply, maintenance, inspection, servicing, repairs, general overhauls, system upgrading, and training. A fairly recent addition to our portfolio of services is a range of pre-owned ALPINE machines. No matter what part of the world you are in or what your processing challenge is, Hosokawa Alpine is never far away with the best solutions and support. Our range of services includes project management, installation, commissioning, training, maintenance and system upgrades.
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PROCESS TECHNOLOGIES FOR TOMORROWSM2001005030201053 2 µmParticle size d97/ µm10Mohs’ hardnes sCWZPS ACMAW MLGM S.O.S.O. -S.F.ATR/ANRAFGt/hStratoplex ASPVentoplex CMicron MSTurboplex ATP multi-wheelTurboplex ATP Turbo Twin TTCTSP/TTSPTurboplexATP-NG2001005030201053 2 µmParticle size d97/ µmFINES YIELDsingle-wheel2001005030201053 2 µmKorngröße d97/ µm10Mohs-Härte CWZPS ACMAW MLGM S.O.S.O. -S.F.ATR/ANRAFGt/hStratoplex ASPVentoplex CMicron MSTurboplex ATP MehrradTurboplex ATP EinradTurbo Tw in TTCTSP/TTSPTurboplexATP-NG2001005030201053 2 µmKorngröße d97/ µmFEINGUTLEISTUNG4 / 5OVERVIEW THE CLASSIFIER EXPERTS We offer systems for a wide variety of different products and fineness ranges, tailored to meet with the technical and economical demands of the individual application.ZIRKOPLEX CLASSIFIER MILL ZPS Highly flexible air classifier mill for the processing of soft to medium hard materials. High-speed impact mill combined with single or multi-wheel Turboplex classifier for precise control of product topsize. Fineness range d 97 < 10 - 200 µm. ALPINE SUPER ORION SO BALL MILL OPERATED IN CIRCUIT WITH AN ALPINE TUR -BOPLEX CLASSIFIER ATP to produce a range of paper filler in coating quality (d 80 2 µm) as well as coarse fillers (e.g. dolomite powder for road-work paint with a d 97 of 100 µm). FLUIDISED BED OPPOSED JET MILL AFG For the processing of powders with a Mohs Hardness of up to 10, producing a steep particle size distribution with precise control of product topsize in the fineness range < 5 µm to 200 µm. Classifier wheel(s) incorporated into top section which is hinged back or removed for easy clean. Since the market introduction of the Mikroplex spiral air classifier MP in 1948, Alpine has continued with its successful development and manufacture of air classifiers. GRINDING AND CLASSI FICATION Where size reduction is required with control of particle size Alpine mills are operated either in conjunction with downstream classifiers or with an integral air classifier. STRATOPLEX AIR CLASSIFIER ASP Classifier designed for high throughput rates in the fine to medium separation range of d97 20 Œ 200 µm. High fines yield with low specific power consumption. TURBOPLEX ULTRAFINE CLASSIFIERS ATP AND ATP-NG Single- and multi-wheel classifiers for ultrafine separations. Superfine powders in the fineness range of d 97 3 Œ 10 µm, and in NG design, finenesses down to d 97 2 µm (d 50 0.5 µm) are possible. Spatter-grain free operation over the entire separation range. Integrated coarse material classifier in-creases the yield. TURBO-TWIN-CLASSIFIER TTC Newly developed classifier wheel geometry pushing the limits of air classification to new levels - d 50 0.5 µm achievable. CLASSIFIERS TSP / TTSP One- or two-stage ultrafine classifier with a high precision of cut. Ideally suited for classifying toner and pigments, e.g. to minimise the ultrafine portion < 2 - 5 µm (see separate brochure). MULTI -PLEX ZIGZAG CLASSIFIERS MZM AND MZF Gravity classifiers for sharp separations in the range 0.3 - 10 mm. VENTOPLEX AIR CLASSIFIER V Circuit-air classifiers for high throughputs. Fineness range approx. d 97 = 32 µm to 200 µm. Low energy consumption. MICRON AIR CLASSIFIER MS Air-stream classifier designed for pneumatic product feed. Fineness range approximately d97 15 Œ 150 µm. High throughput rates. TABLE ROLLER MILL AWM WITH INTEGRATED CLASSIFIER TOP SECTION For end-product finenesses of approx. 10 µm - 100 µm. An MS classifier or Turboplex ultrafine classifier is integrated into the mill top section. The grinding process in the material bed is advantageous above all for flaky fillers such as talc or abrasive products such as feldspar. 2001005030201053 2 µmParticle size d97/ µm10Mohs' hardnes sCWZPS ACMAW MLGM S.O.S.O. -S.F.ATR/ANRAFGt/hStratoplex ASPVentoplex CMicron MSTurboplex ATP multi-wheelTurboplex ATP Turbo Twin TTCTSP/TTSPTurboplexATP-NG2001005030201053 2 µmParticle size d97/ µmFINES YIELDsingle-wheel2001005030201053 2 µmKorngröße d97/ µm10Mohs-Härte CWZPS ACMAW MLGM S.O.S.O. -S.F.ATR/ANRAFGt/hStratoplex ASPVentoplex CMicron MSTurboplex ATP MehrradTurboplex ATP EinradTurbo Tw in TTCTSP/TTSPTurboplexATP-NG2001005030201053 2 µmKorngröße d97/ µmFEINGUTLEISTUNG
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PROCESS TECHNOLOGIES FOR TOMORROWSM6 / 7APPLICATION AREASLimestone, quick lime, fertilising lime, feed lime, bentonite, dolomite, gypsum, chamotte, quartz, feldspar, pegmatite, raw kaolin, ore, phosphor, glass powder, abrasives, rice flour, bone meal, etc. Because of the high wear resistance and the high achievable fines throughput, the Ventoplex air classifier is ideal for use in the mineral powder industry, especially for ceramic powders that need to be produced without iron contamination. FEATURES - Wide fineness range - High fines throughput rate - Insensitive to overload - Low specific energy consumption - Low peripheral speed - Low air circulation rate - Low overall height - Good accessibility for inspections - Maintenance-friendly design, use of inexpensive wear parts and thus low maintenance costs. *) Reference material: limestone with density 2700 kg/m³; feed material with 70% < d f97VENTOPLEX® CLASSIFIER C Ventoplex Typ C C9V C12V C15V C18V C21V C25V C28V C32V C36V Scale-up factor F = approx. 1 1.8 2.8 4 5.6 8 10 12.5 16 Drive power of internal fan kW 3.0 5.5 7.5 11 15 22 30 37 55-75 Material feed: from above centrally via hollow shaft from the side via feed screw or air conveying channel Drive power of classifier kW 1.5 2.2 3.0 4.0 5.5 7.5 11 15 22 Max. classifier speed 1/min 1120 800 670 560 475 400 355 315 280 Max. feed rate t/h 3 5 8 12 17 24 30 38 48 Fineness d97 = approx. µm 32 - 200 32 - 200 32 - 200 32 - 200 32 - 200 40 - 200 40 - 200 45 - 250 50 - 250 Fines yield *) d f97 32 µm t/h 0.4 0.7 1.1 1.6 2.2 --- --- --- --- 45 µm t/h 0.5 0.9 1.5 2.2 3.0 4.3 5.4 6.8 (8.5) 63 µm t/h 0.7 1.2 1.9 2.8 3.9 5.6 7.0 8.8 11.2 90 µm t/h 0.9 1.6 2.5 3.6 5.0 7.2 9.0 11.3 14.4 200 µm t/h 1.6 2.9 4.5 6.4 9.0 12.8 16 20 25.6 Ideal for sharp separations in the range d 97 = approx. 0.3 - 10 mm. Throughputs can range from a few kg/h in the case of the laboratory classifier up to approx. 200 t/h for the industrial-scale multi-tube classifier. Classification takes place at every change in direction of the Zig-Zag tube and permits an extremely high, steplessly adjustable precision of cut. The result is clean-cut fines or lightweight material, even under overload conditions. APPLICATIONS AREA OLEAGINOUS FRUITS Classifying systems for separating cracked soy beans or sunflower seeds. PRECIOUS METALS The separation of copper, aluminium or lead from the insulation material of previously cut cable scrap. Dust removal from plastic granules, coke, chalk, fertilizers, bauxite, etc. Alpine offers zigzag classifiers in two different designs: MZM and MZF. Each design is available in a range of machine sizes from a single-tube to a multi-tube classifier. MZM DESIGN Feature:Feed material introduced into the middle part of the zigzag tube. MZF DESIGN Feature:Feed material introduced at the lower end of the classifying tube via a flybed channel. MZF classifiers are used for granular materials that are either free- flowing or can be dispersed with air. FEATURES - Maintenance-free and wear-resistant - Overload-proof- Insensitive to changes in the feed material composition Because of these characteristics once set, the classifying system can be operated over long periods without any supervision at all. FUNCTION The Ventoplex C is an internal recirculation air classifier. In contrast to the former Ventoplex B with central drive, the new C design has a separately driven classifying wheel. In the new machine, the fan and classifying wheel are coaxially arranged and are driven by means of two separate hollow shafts. This makes it possible for the user to set different speeds and thus permits a significant extension of the fineness range from currently 32 µm to 200 µm. The product is fed to the centre of the classifier head via a hollow shaft, from which the material falls onto a centrifugal plate underneath the classifying wheel. The centrifugal plate distributes the feed material uniformly in the classifying chamber. Coarse particles fall against the upward flow of classifying air to the bottom, collect in the coarse material cone and are discharged through the side of the Internal recirculation air classifier with high fines yield. Fineness range approx. d 97 = 32 µm Œ 200 µm. machine via a gravity chute. Fine particles in the feed material become entrained in the upward flow of classifying air and enter the classifying wheel along with the classifying air. The particles in the classifying wheel are classified by the two competing forces, namely centrifugal force and flow force. Coarse particles are rejected by the centrifugal force, whereas for the fine particles, the drag force of the air flow predominates, allowing the particles to pass through the classifying wheel. The Ventoplex air classifier requires no additional external dust collector to separate the fines. MULTI-PLEX ® CLASSIFIER MZM A ND MZF
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PROCESS TECHNOLOGIES FOR TOMORROWSM1234566678910118 / 91 Feed bin 2 Feed metering unit 3 Change-over flap 4 Super orion ball mill 5 MS air classifier 6 Rotary valve 7 Automatic reverse jet filter 8 Control valve 9 Fan10 Fines collection bin 11 Control cabinet MICRON AIR CLASSIFIER MS Robust air-stream classifier (pneumatic product feed) for high throughputs. Fineness range: approx. d 97 = 15 - 150 µm. The slow rotation of the MS wheel in the medium fineness range brings advantages regarding the pressure drop and wear rate. The classifier can also be operated with high air flow rates. PRINCIPLE OF OPERATION The feed material enters the classifier with the main air flow which can be a highly cost effective process option if integrated into a system with direct pneumatic feed. The classifying wheel is driven by a belt drive and a three-phase asynchronous motor. The classifying wheel speed can be steplessly adjusted by means of a frequency converter. By altering the classifying wheel speed, the particle size can be easily adjusted even during operation. Fine particles whose size is below the set cut point are transported through the rotor blades along with the classifying air, then discharged via the fines discharge in the main air flow, and finally collected in a suitable filter. Coarse particles are rejected by the classifying wheel and discharged via the coarse material discharge. Before being discharged, the coarse material is rinsed intensively in a spiral flow taken from the secondary air stream to remove any last fines, i.e. this final classi- fication step improves the precision of cut and increases the fines yield. APPLICATION AREAS Talc, calcium carbonate, bentonite, kaolin, loam, dolomite, quartz, kieselguhr, pigments, fine-grade chemicals, etc. The MS Micron air classifier unit can be operated in closed circuit operation with a ball mill or as a classifier head in conjunction with a table roller mill. The MS classifier wheel is suspended from a vertical shaft and is of welded construction. The vanes of the wheel are inclined and tapered into a conical shape. During operation oversize product is deflected away from the rotating wheel. The Micron air classifier is a robust air-stream classifier for separations in the medium fineness range at high throughput rates. DESIGNSFor operation on abrasive materials the classifier can be offered in a wear protected design. For applications in the food or pharmaceutical industries, the classifier can be manufactured in stainless steel. SPECIAL MICRON MS DESIGN* Feed material with 70% < d f97Micron Air Classifier Type MS-1H MS-2H MS-3H MS-4H MS-5H MS-6HScale-up factor F = approx. 1 2.7 5 10 20 40Drive power kW 5.5 11 15 30 45 55Max. speed rpm 5000 3300 2500 1600 1100 800Air flow rate m3/h 900 2400 4800 9000 18000 36000Fineness d97 = approx. µm 7 8.5 10 12.5 15 18Fines yield, max* d f97 20 µm in t/h 0.2 0.6 1.1 2.1 4.2 8.4 45 µm in t/h 0.3 0.8 1.6 2.9 5.9 12.0 63 µm in t/h 0.4 0.9 1.8 3.4 6.7 13.5MICRON® AIR CLASSIFIER MS
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PROCESS TECHNOLOGIES FOR TOMORROWSM10 / 11 STRATOPLEX ® AIR CLASSIFIER ASPDeflector-wheel classifier for the medium- fine separation range between approx. d97 = 20 - 200 µm. The Stratoplex is a cost-effective classifier characterised by it's high precision of cut, high fines yield, low energy consumption and ease of adjustment. The cut point can be adjusted by means of a frequency converter as a function of the classifying wheel speed. The two design variants - one equipped for separations in the fine range, the other for separations in the coarse range - make it easy to adjust the classifier for optimum performance on the particular application. The quality of classification is maintained even when the feed rate is high. And the low pressure drop of only 600 - 800 daPa for the entire classifying system permits extremely low-energy operation. 630 ASP WITH WEAR-PROTECTED CERAMIC CLASSIFYING WHEEL, FINE-RANGE EQUIPMENTFEATURES The ASP classifier can be operated in the following modes: - through-air mode - circuit-air mode with approx. 10% leakage air The compact and modular design of the Stratoplex air classifier results not only in maximum performance at modest dimensions, but also permits an easy and space-saving system configuration. And because most of the main components can be accessed easily from above, Stratoplex air classifiers are quick and easy to maintain. Stratoplex air classifiers are budget-priced standard classifiers for the fine to medium separation range. WEAR PROTECTION In spite of the fact that the wear rate is relatively low, all major product- contact components of the Stratoplex air classifier can be equipped with special wearprotection elements, e.g. - Pur- Al2O3- NaxtraSIMPLE DESIGN PRINCIPLE OF OPERATION Because the drive of the Stratoplex air classifier is fitted underneath the classifying zone and the feed product is fed centrally from above, the result is an optimum distribution and dispersion of the product. The feed product is charged by means of the feed unit via the product intake to the centrifugal plate of the classifying wheel, where it is distributed uniformly and radially dispersed towards the baffle ring. The feed material is deflected by the baffle ring and routed downwards into the classifying zone. The classifying air enters the spiral housing and flows through the helical vanes of the vane ring and the classifying wheel in a centripetal direction. The fines portion is removed thereby from the feed material as it gravitates downwards in the classifying zone, i.e. the zone between the vane ring and the classifying wheel. The fines, extracted as a function of the cut point set on the classifier, are entrained in the classifying air and flow towards the fines discharge. The fines must be separated from the classifying air in a downstream collection device (cyclone, filter). The coarse material is rejected by the classifying wheel and falls down into the lower section of the classifier. The coarse material discharge must be air- sealed by means of a rotary valve. Rinsing air, either drawn in automatically or supplied under pressure, prevents unclassified product from migrating into the fines through the gap between the classifying wheel and the labyrinth seal. The classifying wheel is usually driven via a V-belt drive with a fixed transmission ratio; the classifier speed can be set by means of a frequency converter. The classifier is delivered complete with filter, fan and cyclone. APPLICATION AREAS Alpine's ASP classifiers are used above all for processing feldspar, quartz, nepheline, and wollastonite, etc. The Stratoplex ASP is also available in a special design for processing products such as hydrated lime that tend to deposit. CLASSIFYING WHEEL VANE WITH BONDED CERAMIC OVERLAY Stratoplex ASP Type 315 400 500 630 800 1000 1250 1500 1800Scale-up factor F = approx. 1 1.6 2.5 4 6.4 10 16 25 33Drive power kW 5.5 7.5 11 15 22 37 55 90 132Speed / coarse rpm 2000 1600 1250 1000 800 630 500 420 350 Speed / fine rpm 4000 3200 2500 2000 1600 1250 1000 840 700 Air flow rate m3/h 2500 4000 6300 10000 16000 25000 40000 64000 82000Fineness d97 = approx. µm 8 9 10 11 13 15 17 20 25Fines yield, max*) df97 20 µm in t/h 1.8 2.1 2.7 3.2 3.8 5.5 6.8 10 - 63 µm in t/h 2.2 3.6 5.4 9 14 22 36 50 80 90 µm in t/h 2.5 4 6 10 16 25 40 55 80*) Feed material with 70% < d f97
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PROCESS TECHNOLOGIES FOR TOMORROWSM11 2 341123314 / 15 TURBOPLEX®-MULTI-WHEEL CLASSIFIER The cut point size x T is proportionate to the root of the radial air velocity w r and the root of the collector diameter D, and inversely proportional to the peripheral velocity u ( L = dynamic viscosity of the air, S = density of solid, F = adaptation parameter). For small particle diameters, therefore, it is best to target low flow rates, small classifying wheel dimensions and high peripheral speeds. The equation also delivers the basis for Alpine's multi-wheel principle: a small wheel can separate finer assuming constant operating conditions. In order to satisfy the demand for super- fine products at high throughput rates Alpine developed the concept of the Turboplex multi-wheel classifier whereby several smaller classifier wheels are installed in a single machine. This multi-wheel concept enables the production of superfine products, typically in the 3 - 6 µm range, with an extremely high fines yield at an optimum precision of cut. The multi-wheel Turboplex classifier operates in conjunction with a single cyclone / filter and fanset so represents a cost effective method of achieving superfine separations at high throughput rates. Dependent on the end-product fineness, the feed product and the machine size, the feed rate of Turboplex multi-wheel classifiers ranges between about 150 and 30,000 kg/h. APPLICATION AREAS Especially developed for ultrafine classifying operations, Alpine's multi-wheel classifiers are ideal for processing metal powders, mineral powders, abrasives, toner, and wax. Superfine end products can usually only be manufactured with relatively small classifiers, i.e. laboratory or pilot units, and naturally only in correspondingly small amounts. Once the pilot plant is scaled up to production scale, the desired ultrafine separation is no longer achievable. Theoretically, during classification of particles separated in the field of centrifugal force, an equilibrium of forces is established between the centrifugal force and the drag force of the fluid flowing around it. According to Stoke's law (Re < 1), which applies in the case of very fine particles examined here, the following is obtained for the diameter of the cut-size: Scale-up through the classifier range to achieve greater throughputs influences not only capacity but also the performance of the classifier in terms of the cut point and the precision of cut. MULTI-WHEEL CLASSIFIER 630/4 ATP 1 Several horizontal classifying wheels of the same diameter are driven independ- ently. The common speed control is accomplished by a frequency converter. 2 The product is either gravity fed from the side via a rotary valve or is fed entrained in the flow of classifying air. 3 Common fines discharge. 4 Coarse material discharge with optimised coarse material classifying WEAR PROTECTION Classifier wheels: - Al2O3 all-ceramic for sizes ATP 50, 100, 200 and 315 - SiC for the sizes 100 and 200 - Steel classifying wheel with tungsten carbide coating Product-contact classifier parts: - PUR lining - Ceramic lining - Exchangeable steel wear-protection elements with welded special alloy PRINCIPLE OF OPERATION Besides first-class performance, Turboplex multi-wheel classifiers offer numerous technical and operating advantages: - Instead of a number of small parallel- connected classifiers, only one single classifier for superfine end products and high throughput rates. - The product is fed via only one single port; this means that only one metering unit is required. - The fines are discharged through a common outlet duct, enabling simple adjust of airflow through the machine. - The coarse material is collected at only one exit point. Because of the high throughput rates, Turboplex multi-wheel classifiers can be combined in circuit with correspondingly large mills. SiC CLASSIFYING WHEELSCERAMIC LINING
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PROCESS TECHNOLOGIES FOR TOMORROWSM10090807060504030201000,511,522,516 / 17 TURBOPLEX® ATP-NG e.g. the Hosokawa Alpine ball mill S.O.-SF or the agitated ball mill ATR, fine products with a d 50 of 0.7 and even 0.3 µm have been achieved.Whereas when manufacturing ultrafine limestone and talc filler it is the fineness of the classification that is all-important, other applications target a coarse end product with a particle size distribution that is as steep as possible. Here, too, the new generation of classifiers has proved itself. In contrast to conventional methods, it was possible in this particular case to increase the coarse yield with the new classifier from 33 % to 38 % without any appreciable change to the quality of the coarse material. At the same time, the reduction of the pressure drop also led here to substantial energy savings. THE TURBOPLEX ATP- NGIn a grinding-classifying circuit, the amount of energy needed for the classification increases with increasing end-product fineness. This fact gave rise to the demand for a low-energy classifier that was capable of achieving fineness values in the range of d 50 < 1 µm. The "New Generation" Turboplex (ATP-NG) operates in accordance with a completely new classifying principle that is based on the concept of solid-bed flow instead of the conventional potential flow. This new concept has made it possible to reduce the pressure drop and the entire classifying energy quite considerably. A special vane geometry permits a uniform material flow and thus an even finer classification. The advantages of this new classifier generation are especially con -spicuous when used in the submicron range: low energy consumption at high yield. Another plus point is the ease with which existing ATP classifiers can be upgraded with the new classifying wheels. With the new NG wheels, it has been possible to reduce the pressure drop by approx. 60 % when compared with the ATP standard classifying wheel. And because in the ultrafine range, it has also been possible to improve the yield, the result in many cases is an energy saving of between 30 and 50 % referred to the fines yield. With the new classifier generation, end-fineness values are possible that were to date inconceivable with production-scale systems. And in combination with new mills, Multi-wheel classifiers are the classifier of choice for ultrafine classifying operations, and because the particle diameter is also directly dependent on the classifying wheel diameter, it is possible in the majority of cases to fulfil customer requirements. FEATURES - 30 - 50 % less energy requirement in comparison with the standard Turboplex classifier- Classification down to d 50 = 0.5 µm - High fines yield - Easy Upgrade - conversion of existing machines to ATP-NG design can be achieved by simple replacement of the classifier wheel and drive unit. WEAR PROTECTION - Classifying wheels with tungsten carbide. (Ceramic classifying wheels are not used with the ATP-NG.) d50 [µm] ENERGY REFERRED TO THE FINES YIELD (%) = ATP = ATP-NG MULTI-WHEEL CLASSIFIER 315/6 ATP-NG Turboplex ATP-NG Type 315 500 630 750 315/3 315/6 500/3 500/4 630/4Scale-up factor F = approx. 2.5 6.25 10 13.5 7.5 15 19 25 40Drive power kW 18.5 30 45 55 3 x 18.5 6 x 18.5 3 x 30 4 x 30 4 x 45 Max. speed rpm 5600 2800 2400 1920 5600 5600 2800 2800 2400Max. air flow rate m3/h 3500 8800 14000 22000 10500 20000 26000 35000 56000Fineness d 97 = approx. µm 2.5-150 3.5-150 6-200 7-200 2.5-150 2.5-150 3.5-150 3.5-150 6.0-200 Fines yield max*) d f97 4 µm in t/h 0.10 0.25 - - 0.3 0.6 0.75 1.0 - 5 µm in t/h 0.2 0.45 - - 0.5 1.1 1.3 1.8 - 6 µm in t/h 0.3 - - 0.8 - - - - - 8 µm in t/h 0.4 1.0 1.6 2 1.2 2.3 3.0 4.1 6.2 10 µm in t/h 0.6 1.3 2.0 2.6 1.5 3.1 3.9 5.3 8.5*) Feed material with 70% < d f97
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PROCESS TECHNOLOGIES FOR TOMORROWSM12331351112761191110818 / 19 TURBO TWIN CLASSIFIER TTC The patented classifying wheel geometry of the Turbo Twin permits high throughput rates and loading factors at a steep top cut, and therefore constitutes an attractive alternative to the Alpine multi-wheel classifiers. The low pressure drop results in an even lower energy consumption than that of the ATP. The classifying wheel is supported at both ends and permits extremely high speeds, i.e. peripheral speeds of up to 120 m/s can be realised. Product feed is either by gravity or pneumatic.The classifier bottom section corresponds to that of the ATP, meaning that any existing ATP machine can be retrofitted with the TurboTwin classifier. The classifying wheel is driven by means of a three-phase asynchronous motor with frequency converter and flat belt drive. There are currently 5 machine sizes with drive outputs between 18.5 and 132 kW available. TURBO T WIN CLASSIFIER TTC This new classifier for fineness values of d 97 between 2 and 4 µm at high product yields is ideal for the ultrafine classification of mildly abrasive products such as limestone, talc, silica, graphite, barite, mica and kaolin. APPLICATION AREAS - Superfine end products - Mildly abrasive feed products, e.g. lime- stone, talc, silica, graphite, barite, mica, kaolinWEAR PROTECTION - Naxtra classifying wheel - and tungsten carbide coating FORCED VORTEX FLOW IN CLASSIFYING WHEEL Turbo Twin Classifier TTC Type 200 315 500 630 710 Scale-up factor F = approx. 1 2.5 6.25 10 12.5 Drive power kW 18.5 30 55 90 132 Max. speed rpm 10000 7300 4600 3650 3250 Max. air flow rate m³/h 1600 4000 10000 18000 25000 Fineness d97 = approx. µm 2.5 3 3.3 3.5 4 Fines yield max*) d 97 3 µm in t/h 0.04 0.09 - - - 4 µm in t/h 0.07 0.18 0.42 0.63 - 5 µm in t/h 0.11 0.26 0.65 0.98 1.3 6 µm in t/h 0.14 0.35 0.88 1.4 1.9 8 µm in t/h 0.23 0.56 1.4 2.3 2.9 10 µm in t/h 0.28 0.79 1.8 2.8 3.5*) Feed material with 70% < d f971 Feed bin 2 Feed metering device 3 Diverter valve 4 Super Orion Ball Mill S.O. 5 Bucket elevator 6 Safety screen 7 Stratoplex Classifier ASP 8 Cyclone9 Turbo Twin Classifier TTC 10 Product collection filter 11 Fan12 Nuisance dust extraction 13 Control cabinet SYSTEM FOR LIMESTONE PROCESSING
305 KB – 14 Pages