The large size of material lumps is the cause for the increase of the width of the aprons and the height of the skirts. Apron feeders use sprockets and caterpillars, while belt feeders use rubber belts with motorized head pulleys to convey the material. You would be amazed at how little power it takes to run an apron feeder as they are run through a gear box that is usually reduced down from 3450 rpm or less to x which is the speed of the final driven shaft which powers the sprockets which drive the apron itself. For efficiency of differently shaped feeders, see fig.
Rexnord apron feeders the industrys most preferred feeder. The discharge is positive volumetric in nature, if lump size is small compared to the flow cross section width and depth. Apron feeder calculations archive bulkonline forums can anyone tell me where i could find the detailed calculation to design an apron feeder. The apron feeder consists of heavyduty conveyor chains, on which the apron pans are mounted. Williams patent crusher is an industryleading manufacturer of heavyduty, industrialsized apron pan feeders. Design calculation of vibrating feeder pdf youtube jan 2, 2014, vibrating feeder design calculations pdf, apron feeder calculations bulkonline forums can anyone tell me where i could find the detailed calculation to design an apron feeder regards ziggy more details get price stone crushing vibrating feeder manufacturers. Page 5 the apron feeder can extract material from hopper outlet. Apron feeder design calculation method we have designed and installed several apron feeders in the iron ore industry in western australia. Suitable for most robust applications and for absorbing heavy impact loads. Apron feeders groundbreaking excellence in design metsos heavy duty and robust apron feeders are engineered and built with an intense. The face of the conveyor is made from heavy armour plating, and works like the track on a crawler type tractor. An apron weigh feeder for use in the heavy bulk materials industry includes a feeder. Cutting edges feeder pans perform well in a range of heavy duty applications with high loads and high impact conditions.
The accuracy of the calculations of bulk material flow always contains a high factor of uncertainty. How industrial plants benefit from apron feeder magnetic. How to design efficient and reliable feeders for bulk solids. Ypt apron feeders designed for all type of heavy duty mining operating condition. Spillage conveyor hcc the spillage conveyor is a chain conveyor mounted directly on the apron feeder. As the transported material is lumpy, its maximum lump size will determine the apron width b, in meters. For a symmetrical hopper there is a tendency for the feeder to draw material preferentially from the front of the hopper. Parameter measured by required to cohesive strength direct shear tester calculate outlet sizes to. The plot of predicted pressure is therefore irrelevant when the feeder is on standby. The head shaft produced with forged steel and mounted on heavy duty.
Dec 26, 2012 apron feeder power calculation crusher south africa. How to design efficient and reliable feeders for bulk solids by john w. They are the feeder of choice for reliability, high uptime and high returns on capital, and are designed for decades of service. These pan feeders are built rugged for longlasting performance for any job. This robust and versatile apron feeder has many applications and is ideal for quarry, aggregate and recycling applications. Eclass c36 tsubakiofcanadalimited,1630drewroad,mississauga,onl5s1j6 tel. In other cases, transfer chutes are employed to direct the flow of bulk material from one conveyor belt to another, often via a three dimensional path. We enjoy answering the most challenging apron feeder. The calculation of the af is similar to that of the apron conveyors, but there are some peculiarities. Feeder the feeder controls and meters the flow of bulk material from the hopper to meet the specified discharge flow rate. Get price stone crushing vibrating feeder manufacturers. Critical flow properties of bulk solids are required for proper selection of bins, hoppers, feeders, and chutes. Metso apron feeders diversity can be found throughout the mineral processing circuit fitting different applications with robust designs and high uptime for a more efficient operation. Pan feeders learn about our apron pan feeders williams.
Elecon has supplied appron feeders with capacity upto 3000 tph and pan width upto 2. The apron feeder for ore transportation abstract this paper gives the methodology for driving power calculation of an apron feeder for ore transportation on the example of the apron feeder dof in the open pit of the copper mine majdanpek. Rexnord apron feeders, with their continuous apron of overlapping pans, provide protection against damaging impact of freefalling heavy materials when feeding belt conveyors, screens, crushers and other material handling equipment. Static apron feeder terex jaques apron feeders use heavyduty crawler tractor carrying rollers and chain, a fabricated support frame and highstrength steel head shafts and tail shafts. The fl apron feeder uses the highest quality componentry. The skirtings of the apron feeder are designed according to the expected layer height. Of significant importance on any apron feeder installation is the design of the bin or hopper which will be used to feed the machine.
Apron feeder power calculation formulas thermoscreens. Request quotation apron feeder design calculation free pdf. That is why we manufacture customized apron feeders that are designed to handle specific materials and capacities. Therefore, predicted loads during periods for which a feeder is on standby are inaccurate. For vibratory feeders it appears more appropriate to use the major. Uniform draw can be achieved by making the hopper outlet asymmetrical with the back wall at the correct hopper half angle. Nov 23, 2006 apron feeder calculations izaharis i wnat to know what to take itno account when checking the apron feeder. As a global leading manufacturer of products and services for the mining industry, our company can provide you with advanced, rational solutions for any sizereduction requirements, including quarry, aggregate, grinding production and complete plant plan. Nico apron feeder 48 in 4 ft width 15 ft long feeding section provided with new fabricated pans. Apron feeders are slow moving, heavily loaded conveyors that feed a deep bed of ore from a bulk holding location a bunker as a controlled stream, often into a large capacity crusher. All of boundarys feeder pans are jigged to ensure proper fit and clearance. Apron feeders mclanahaninformation critical to the power calculation and design of an apron feeder includes type of material feed rate size of material and more please contact mclanahan for a questionnaire you can fill out so we can help you select the proper apron feeder.
Sizes and capacities can also be altered as per customer needs. If you have a more detailed question, we can provide the answers. If you prefer a copy of our basic apron feeder calculations form, download this pdf. A special feed hopper design together with the transport of the material leads to a certain layer thickness.
Nov 23, 2006 you would be amazed at how little power it takes to run an apron feeder as they are run through a gear box that is usually reduced down from 3450 rpm or less to x which is the speed of the final driven shaft which powers the sprockets which drive the apron itself the average apron. Metsos worldclass apron feeder is not a new design. This clip shows a rud apron feeder conveyor for a customer in the. Metso builds apron feeders that are the global standard in quality, durability, and reliability. Belt feeder calculation cema apron belt conveyor power calculation xls. Hello to all, i am quite new to bulk material handling equipment design.
Apron feeder highstrength, heavyduty productive processing. The impact loads are absorbed by a natural material bed on top of the feeder, and in combination with heavy duty impact beams in the feeding area, the apron feeder is designed to handle the toughest operational conditions. The standard apron feed is used for feeding crushers and screeners. Calculation of deck speed for any given capacity deck speed mminute hopper design hopper. The analysis was done by calculation for given operating parameters. Boundarys apron feeder pans exhibit the tightest fit with enhanced overlap to avoid trapping material in between the feeder pans. The lifetime of all parts is long, even under severe conditions, and maintenance requirements are low.
The basic formulae for apron chain feeders calculation are given only for references, since that each manufacturing company has its own methodology for calculation. It regulates the feed by carrying the ore to the delivery point at a controlled rate of speed. The performance of feeders affects the efficiency of chp. Without this information, bin geometry may be chosen based on guesswork. Our pans are designed with a wiper to keep fines out of the mating surfaces and feature a machined fit for close tolerances. Apron feeders pans designed and manufactured to deliver better plant productivity. An overview of feeder design and performance focussing on belt and apron feeders is presented the importance of correct hopper and feeder interfacing is stressed the objective is to achieve uniform drawdown in the hopper and procedures for achieving. Apron feeder power calculation formulas apron feeder calculations bulkonline forums. Pdhonline course m360 1pdh chain conveyors practical.
Standard salt tractor chain and carrying rollers used. Box 15043, york, pennsylvania 174057043, usa general information. The feeders used in chp are apron feeder, vibrating feeders, roller screens and vibrating screen feeders etc. Aim of the present paper is the systematization and the unification of the formulae for calculation, the ascertaning of the values of the coefficients for the calculation, the proposition of new formulae for the determination of some of the apron feeders parameters, and to calculate specific apron feeders. Weve produced a variety of apron feeder applications with a diverse range of material and capacity. Based on our experience, we believe, that one size doesnt fit all when it comes to material handling equipment. Another successful project nearing completion by our engineering and production teams. Design calculation of vibrating feeder pdf youtube jan 2, 2014, vibrating feeder design calculations pdf, apron feeder calculations bulkonline forums can anyone tell me where i could find the detailed calculation to design an apron feeder regards ziggy more details. The higher of the two values of feeder volume given by equations 1 and 2 satisfies both requirements and thus taken as the actual volume of the.
The essential requirement is to promote uniform feed with the whole of the. Apron feeders must always be employed to ensure that the feed to a crushing machine is drawn at a constant rate from the bin which serves it. Longlasting apron feeder increases productivity i flsmidth. The presence of fixed skirts causes additional resistances due to skirt friction. Terex minerals processing systems d series apron feeders. In the case of vibratory feeders, there is a tendency for feed to occur. Proper design of dump hoppers for apron feeders published on. The chains run on support rollers that are mounted to the apron feeder frame. As the originator of the crawler tractortype apron feeder, metsos. Hopper some extracts from the book belt feeder design and. Primary apron feeders are for highcapacity applications up to 10,000 tph, speed between 10 to 25 mmin. Information critical to the power calculation and design of an apron feeder includes type of material, feed rate, size of material and more. Elecon apron feeders are of extremely rugged construction and.
The large lubricant reservoir is factory sealed for life. Over 50 years experience in designing heavyduty apron feeders for all applications. The rugged design remains the preferred choice of material handling and processing industries around the world. Conveying capacities of up to 2500 t h with piece sizes of 2. Overview of feeder design focusing on belt and apron feeders. Supply apron feeder power calculation rock crusher. The various available standard pitches and tensile strength ratings of this chain allow a suitable selection for all widths and lengths of apron feeder applications. A group of apron feeders at bhpbios port facilities in port hedland were analysed during this study. Please contact mclanahan for a questionnaire you can fill out so we can help you select the proper apron feeder. Operating principle the feed material from the feed hopper above the apron. They are driven by chain sprockets and tensioned either mechanically or hydraulically. Lowwear and highoutput conveyor capacities apron feeders hazemag apron feeders haf are used for feed hopper discharging in primary crushing plants as a loading or discharging conveyor e. Apron feeders are a reliable solution for extracting or feeding ores that are wet, sticky, dry or even frozen.
The average apron feeder is also capable of running in reverse as well. The apron feeder is used for dealing with materials which are very hard, abrasive, tough and for lumps of larger dimensions. Prevent flooding rexnord apron feeders are the solution to flooding problems by regulating delivery of material. Pdf design of belt and apron feeders an overview of. When designing apron feeders, we take into account many factors such as. Apron feeder power calculation formulas pejawcrusher zenith screen can separate the stuff of different size range it is the most general means of size control. Tunra method roberts 2001, calculations were made using the geometry of each hopper. Apron feeders must always be employed to ensure that the feed to a. Apron feeder continuous barge unloader shredder design adjustment for top roll float 127 5. A group of apron feeders at bhpbios port facilities in port hedland were. Of the many designs in existence by far the most widely used are the apron and pan feeders, although the ross chain feeder is coming into favour for handling coarse ore. An overview of feeder design and performance focussing on belt and apron feeders is presented. Apron feeders are generally used as a primary or bin feeder application designed for varying applications, from lightduty to severeduty, from low tonnage to high tonnage of material.
An apron feeder is in fact a conveyor that is constructed from metal. Carrying and return rollers have hardened wheels and pins for long wear life. In otherwords how to design chain for apron feeder. Aug 02, 2016 figure 1 apron feeder application to dump hopper and feeding primary crushing plant. In our faq frequently asked questions section, each question incorporates a specific answer. The presence of fixed skirts cause additional resistances due to skirt friction. Apron feeder design calculation free pdf downloads. Chat online apron feeder power calculation equation addoorbiz calculation of apron feeder ijcmsin. Design, dimensioning and power calculation of the apron. The hopper outlet length can be up to 7 to 8 m lesser the length the more favourable is the situation. Click here to download our apron feeder catalogue as a pdf. Our apron pan feeder line has a cast manganese pan deck and is made with parts from the worlds most popular crawler tractors for extra heavyduty use.
Apron feeders are normal y employed for heavy duty application. Cuttingedges quality apron feeder pans provide superior performance for a wide range of apron feeders. To enable osborn engineers to calculate the optimum size apron feeder, also taken into consideration as well as the completed data sheet are the following points that we insert into our formulae. Metso apron feeder s diversity can be found throughout the mineral processing circuit fitting different applications with robust designs and high uptime for a more efficient operation. If you prefer a copy of our basic belt feeder calculations form, download this pdf. The need for feeders and massflow hoppers to be designed as an integral unit to promote uniform feed is emphasised. Apron feeders have capacities up to 6000 th and are able to transport materials with maximum lump size up to 2000 mm. The apron feeder layout is also pre sented, as well as the technical characteristics of the. Apron feeder is the best solution for wet, sticky and abrasive material when other type of feeders can not handle. Whatever the material to be moved, the best method will be found with the complete line of rexnord apron feeders. Apron feeders are a version of belt feeders and are useful for feeding large tonnages of bulk solids being particularly relevant to heavy abrasive ore type bulk. A well designed hopper may be prevented from functioning correctly if the feeder is.
Generally vibrating feeders, which are used, are of electromagnetic type. Volume 241 minerals beneficiation design criteria for bin feeders. A feeder is an extremely important element in a bulk material handling system, since it is the means by which the rate of solids flow from a bin or hopper is controlled. The importance of the hopper and feeder to be designed as an integral unit cannot be too greatly emphasised. Figure 18a shows an apron feeder with parallel outlet which is inducing funnelflow down the rear wall of the hopper.
The apron feeder for mining showcases cast manganese steel aprons, salt chain components and forged alloy steel main shafts. The importance of correct hopper and feeder interfacing is stressed. Look to rexnord for the right answer to bulk material feeding solutions. Dec 26, 2012 apron feeder design calculation free pdf downloads.
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