The essential requirement is to promote uniform feed with the whole of the hopper feeder interface active. Heavy duty apron nico fd8 feeder for sale used heavy duty. The skirtings of the apron feeder are designed according to the expected layer height. Apron feeder continuous barge unloader shredder design adjustment for top roll float 127 5. Nico model fd4466, 56 x 27 l apron feeder with hagglunds drive.
Metallurgical contentapron feeders apron feeder capacity formula. Primary apron feeders are for highcapacity applications up to. Panapron suggested thickness service inches conditions materialhandled 38 heavy highlyabrasive,corrosiveor largeimpactloads 14516 medium moderatelycorrosive,abrasive orimpactloads 316 light mildlyabrasive,corrosive orimpactloads. Apron feeders must always be employed to ensure that the feed to a. Feeder loads investigation 38 if the tunra method was to predict feeder loads with complete accuracy, the design of the hopperfeeder system would still be conservative due to the safety factors applied during design of the feeder drive system and the steel supporting structure. A procedure for estimating feeder loads for massflowfeeder combinations has. Nico apron feeder design henan mining machinery and. The design procedures are illustrated by example 4. With over 125 years of combined experience in the application, engineering and manufacturing of heavyduty apron feeders, metso is truly the worldwide leader in the supply of this equipment. Apron feeders are a version of belt feeders and are useful for feeding large. If you prefer a copy of our basic apron feeder calculations form, download this pdf. Pdhonline course m360 1pdh chain conveyors practical. Ivan rilski sofia 1700, bulgaria abstract 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. Apron feeder design calculation free pdf downloads.
Calculation method for design silos and hoppers silos. Feeder loads investigation 38 if the tunra method was to predict feeder loads with complete accuracy, the design of the hopper feeder system would still be conservative due to the safety factors applied during design of the feeder drive system and the steel supporting structure. Apron feeder locations continental conveyor ontario ltd. Sizes and capacities can also be altered as per customer needs. A design formula has to be conservative to deal with the general case, so there is an inherent. Innovative design features and tightest tolerance boundarys custom designs include recessed bolt holes and often a short grouser to prevent wash out and reduce downtime to replace worn bolts. Dust will require special consideration in the design of the equipment, possibly a dust chute prior to the feeder or an. A special feed hopper design together with the transport of the material leads to a certain layer thickness. How to design efficient and reliable feeders for bulk solids by john w. Pdf design of belt and apron feeders an overview of feeder. Mention is made of the basic design requirements of feed chutes. Conveying capacities of up to 2500 t h with piece sizes of 2. Nico model fd 4466 56 x 27 39 l apron feeder with hagglunds.
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. Ascertaining the methodology for apron feeders calculation hristo sheiretov university of mining and geology st. Calculation method for design silos and hoppers silos and. This is metsos world class apron feeder which combines the best. Can anyone tell me where i could find the detailed calculation to design an apron feeder. Aug 02, 2016 figure 1 apron feeder application to dump hopper and feeding primary crushing plant. Apron feeder power calculation formulas thermoscreens. They are the feeder of choice for reliability, high uptime and high returns on capital, and are designed for decades of service. 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. A simplified methodology is presented for the design of belt feeders and feed hoppers with extended skirtplates for feeding directly onto conveyor belts.
Overview of feeder design focusing on belt and apron feeders. As the transported material is lumpy, its maximum lump size will determine the apron width b, in meters. Calculation of deck speed for any given capacity deck speed mminute hopper design hopper. Texas feeder 72 wide x 65 long krupp heavy duty apron feeder with hopper. Primary apron feeders are for highcapacity applications up to 10,000 tph, speed between 10 to 25 mmin. Our suppliers have used the tunra method andor their inhouse calculations to size the feeders. Rcr is a leader in the design and manufacture of heavy articles apron feeder design radiusharbourheightsmazgaon. Metsos worldclass apron feeder is not a new design. Pdf construction parts of apron feeder grinding mill.
Pdf design of belt and apron feeders an overview of. The importance of correct hopper and feeder interfacing is stressed. The suppliers calcs have provided the same or very similar feeder loads and powertorque requirements to those we have determined during preliminary design. Design, dimensioning and power calculation of the apron. If you have an apron feeder question, please email us at. An apron feeder in the shop with its guards loose material flowing smoothly out of the underground a belt feeder destined for arizona, usa basic apron feeder design calculations if you would like more information, please fill out our apron feeder design calculations form and we. The specific function of these three components is briefly outlined and the need for the hopper and feeder to be designed as an integral unit is stressed. Weak coil springs that are not generating sufficient accelerating forces can also cause low speed and reduce the performance. Apron feeder power calculation formulas apron feeder calculations bulkonline forums. Design of belt and apron feeders an overview of feeder design focusing on. Nov 23, 2006 apron feeder calculations izaharis i wnat to know what to take itno account when checking the apron feeder.
As the originator of the crawler tractortype apron feeder, metsos. It is calculated from an abascus, knowing the hopper discharge angle calculated in step 2. Krupp 1 one krupp industries 72 wide x 65 long heavy duty apron feeder, 100 h. Generally vibrating feeders, which are used, are of electromagnetic type. We have designed and installed several apron feeders in the iron ore industry in western australia. Rcr is a leader in the design and manufacture of heavy duty apron feedersrcr apron feeders are recognised throughout the in. Apron feeder, vibrating feeders, roller screens and vibrating screen feeders etc. Spillage conveyor hcc the spillage conveyor is a chain conveyor mounted directly on the apron feeder. The tractortype apron feeder remains the preferred design throughout the world. Figure 1 apron feeder application to dump hopper and feeding primary crushing plant. Longlasting apron feeder increases productivity i flsmidth.
Either one or two holes are normally provided in the platform, being designated k1 or k2 respectively. The h parameter is used in the formula to calculate the critical outlet diameter to prevent arching. Tunra method, feeder design loads were being overestimated. Traylor apron feeder and jaw crushermetso apron feeder with hagglunds hydraulic drive 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.
Apron speed is determined from the above formula for calculating capacity. 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 in the shop with its guards loose material flowing smoothly out of the underground a belt feeder destined for arizona, usa basic apron feeder design calculations if you would like more information, please fill out our apron feeder design calculations form and we will do our best to offer our suggestions. The need for feeders and massflow hoppers to be designed as an integral unit to promote uniform feed is emphasised. The rugged design and popularity of crawler tractor chain makes it particularly well suited for the severe environment of the apron feeder application. Apron feeders are a reliable solution for extracting or feeding ores that are wet, sticky, dry or even frozen. 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. Dec 26, 2012 apron feeder design calculation free pdf downloads. The apron feeder for mining showcases cast manganese steel aprons, salt chain components and forged alloy steel main shafts. Elecon has supplied appron feeders with capacity upto 3000 tph and pan width upto 2. The springs and coils and suspension rods are the critical parts.
The analysis was done by calculation for given operating parameters. The basic design features of belt and apron feeders is presented. This robust and versatile apron feeder has many applications and is ideal for quarry, aggregate and recycling applications. 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. 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 suppliers calcs have provided the same or very similar feeder loads and powertorque requirements to those we have determined during. Apron feeder design calculation,free pdf downloads. This paper presents an overview of the concepts of feeder design in relation to the loading of bulk solids onto belt conveyors. Apron feeders are used for continuous feeding or volume dosing of. Boundarys apron feeder pans exhibit the tightest fit with enhanced overlap to avoid trapping material in between the feeder pans. The basic formulae for apron chain feeders calculation are given only for references, since that each manufacturing company has its own methodology for calculation. The apron feeder layout is also pre sented, as well as the technical characteristics of the.
An overview of feeder design and performance focussing on belt and apron feeders is presented. Calculation of deck speed for any given capacity deck speed mminute hopper design hopper more detailed. How to design efficient and reliable feeders for bulk solids. 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. The standard apron feed is used for feeding crushers and screeners. A group of apron feeders at bhpbios port facilities in port hedland were analysed during. We enjoy answering the most challenging apron feeder. Some design aspects for selection of heavy duty apron feeders. Of the many designs in existence by far the most widely used are the apron and pan feeders, although. Pan apron suggested thickness service inches conditions materialhandled 38 heavy highlyabrasive,corrosiveor largeimpactloads 14516 medium moderatelycorrosive,abrasive orimpactloads 316 light mildlyabrasive,corrosive orimpactloads.