· Armoured Face Conveyor or AFC. Essentially an AFC is a one-sided trough scraper conveyor, the second side of the trough being formed by the coal face. Cut coal falls into this trough which has an endless chain with scraper flights attached running along the base plate and returning below the base plate in an enclosed lower section or "race".
· This Armored Face Conveyor, or AFC, comprises of twin strands of high diameter chain that lie in a casted trough, with perpendicular ''flight bars'' providing the mechanism to drive the material to one end of the coal face. Figure 1: A detailed image of a section of the Armored Face Conveyor (left) and simple schematic of a longwall and ...
· Armoured face conveyor 1. ARMOURED FACE CONVEYOR By Yashwardhan Singh Naruka 2. In longwall coal mining, the coal cut down by the shearer is transported by the armoured face chain conveyor (AFC), which is laid across the full face width, to the head entry T-junction, where it is transferred to the entry belt conveyor through the mobile stage loader. The armoured face chain con
Variable Speed Drives on Armored Face Conveyors Gareth Rimmington B.Eng, C.Eng, MIET, MIMMM
· 3D Design - Dual Drum Working Face Conveying System. The conveying system is a Face Chain Conveyor (also called Armoured Face Conveyor or Scraper Conveyor), it can convey ore material and provide ...
· An armored face conveyor (AFC) is a key piece of equipment for a fully mechanized long-wall mining system and is currently the only means for transporting bulk material in hard coal mines. To date, the AFC power train design has mainly been based on heuristics obtained via experience, coupled with simple calculations, which cannot take the dynamic behaviors and coupling effects of the ...
system for face conveyors with Baldor Electric since 1991. The CST drive is a planetary gearbox with an integrated infinitely variable multi-disc CST clutch. Also incorporating the proven PMC-D drive control unit featuring no-load motor startup, AFC soft start and …
Entry Conveyors and Belt Tailpieces. Entry conveyor or stage loader pans are normally of the same type as used in the face. These are normally wider than the AFC. While the return roller is integrated into the cross frame design, the head drive frame of the stage loader is tensionable using hydraulic cylinders.
· @article{osti_427897, title = {Prediction of power requirements for a longwall armored face conveyor}, author = {Broadfoot, A R and Betz, R E}, abstractNote = {Longwall armored face conveyors (AFC`s) have traditionally been designed using a combination of heuristics and simple models. However, as longwalls increase in length these design procedures are proving to be inadequate.
The AFC is powered by drive units located either at the maingate or tailgate ends or at both ends. The chain is driven along the face by the use of a gear and sprocket arrangement that transports the coal at a speed in excess of 1 metre/second. However some face conveyors …
AFC means Armored Face Conveyor. AFC is an abbreviation for Armored Face Conveyor. Share this. Have you found the page useful? Please use the following to spread the word: Do you enjoy All Acronyms as much as we do? Ready to support?👍 🙏
For armoured face conveyors (AFC) in coal mines, fracture and jam phenomena of the chain are common failure patterns in the chain assembly. These failure patterns are caused by chain''s severe vibrations from uneven loads on the conveyor. However, due to limitations of harsh operating environment in coal mines, performing underground experiments ...
• Armored Face Conveyor (AFC) • Stage Loader • Main Haulage. Extraction Procedures • Cutting machine moves parallel to the extraction face • Coal is "cut" and falls into the AFC which transports the product from the face • Following successive "passes" of the cutting machine,
How is Armoured Face Conveyor (mining) abbreviated? AFC stands for Armoured Face Conveyor (mining). AFC is defined as Armoured Face Conveyor (mining) somewhat frequently.
When it comes to couplings for armored face conveyors, you can depend on Voith. Voith armored face conveyor (AFC) couplings are built to keep things moving, making it possible to carry the maximum amount of coal smoothly away from the coal face. They''re insensitive to the harsh effects of …
· Longwall armoured face conveyors (AFC''s) have tradi- tionally been designed using a combination of heuristics and simple models. However, as longwalls increase in …
Meeting all Needs From AFC tail drive to entry belt conveyor return end, AFC systems are designed for a variety of performance requirements in low, medium and high seams, for short and long faces. meets the demand of today''s high-capacity shearers …
Entry Conveyors and Belt Tailpieces. Entry conveyor or stageloader pans are normally of the same type as used in the face. These are normally wider than the AFC. While the return roller is integrated into the cross frame design, the head drive frame of the stageloader is tensionable using hydraulic cylinders.
History . Mohler built the first Water-Cooled Armored Face Conveyor (AFC) motors in 1988. Mohler is a leading manufaturer of XP Water-Cooled Electric motors for Longwall Coal Production in U.S.A. and is a Master Rebuilder of electric motors.
· Fig. 5.2. Shows a plan view of an AFC side discharge gear-head. Dowty Meco, Worcester. Courtesy A side discharge conveyor provides a smooth and continuous path for the mineral, turning large lumps easily from the face conveyor to the stage loader and thus eliminate delays caused by lumps blocking the transfer point.
It utilises the "tried and tested" RAMBOR Longwall Face Drill (LFD) which is trolley mounted onto the Spill / Bretby Tray on the Armoured Face Conveyor (AFC), this can be moved and operated with all Operators on the safer, chock side of the spill tray.
· The premium face conveyor is composed of PF6 line pans. The modular design separates wear-resistant hardened steel parts and the substructure made of high-strength steel. The design enables easy replacement of wear parts without damaging the substructure. The front AFC has transport capacity of 2,500t/h, and the rear AFC has capacity of 3,000t.
Joy Armored Face Conveyors. ... Our AFC linepans, fully tested for articulation and horizon management, have become the linepans of choice for high-performance, heavy-duty mining applications and feature: Simple but rugged linepan construction for superior reliability, tighter tolerance assurance, wear and fatigue resistance, and in-service ...
· The data was gathered by measuring the AFC motor currents. The face width monitored was a 1,250-ft wide panel with three 1,250-hp motors using CST technology, 42-mm chain, and 1,142-mm wide AFC. The graph shows that rarely is the conveyor loaded more than 76% of the rated capacity in load during operation.
Entry Conveyors and Belt Tailpieces. Benefits. • Stage loader and crusher completely matched to AFC, both with higher capacity to prevent bottlenecks; tailor-made belt tailpiece for required capacity and belt dimensions, allowing BTP to handle longitudinal and lateral …
16 · SGZ630/110 AFC is a kind of inboard double chain armored face conveyor, which could …
Description. Conveyor Kit – 9.0″ conveyor kit shown. Fits most 1.5″ and 3.0″ aluminum extrusion. Part number based on features. example AFC-1002-90-XX is a conveyor kit with 2 legs stands (AFC-1002), 9.0″ wide (AFC-1002-90), and the last 2 letters stand for the drive kit needed (AFC-1002-90-BP, AFC-1002-90, BI, or AFC-1002-90-OR).
Armoured Face Conveyor (AFC) We develop and produce state-of-the-art Armoured Face Conveyors (AFC) for longwall installations of all sizes. Tensionable drive frames allow for the chain tension to be adapted to the prevailing conditions. Chain tension may be monitored and recorded via load sensors within the AFC. In this way, the chain can be ...
Other articles where Armoured face conveyor is discussed: coal mining: Haulage: …mechanized longwall systems is an armoured face conveyor (AFC). In addition to carrying coal from the face, the AFC serves as the guide for the longwall shearer, which …
· In respect to the data study and classification, conveyor belt with failure abundance of 50.5 % is the most critical, while AFC with the failure abundance of 22.3 % shows the best performance. The results of data analysis indicate that all three machines'' reliability distribution function obeys the power law process.
The new VFD-A800/W800 Variable Frequency Drive (VFD) for longwall systems is designed to work in conjunction with UEL and CST gearboxes to deliver variable speed of the armored face conveyor (AFC), very accurate load sharing between gearboxes, and better efficiency when operating in weak power networks. The advanced technology medium-voltage drive controls torque and speed to …
· superior product support. Of course, that''s what any AFC manufacturer would like to promise. But we can. Our engineers invented the AFC in the early 1940s. Of the ten most productive mines in the world, eight use our face conveyors. Several systems have successfully operated in 350 to 470 m (1,150 to 1,540 ft)
Armoured Face Conveyors from Joy Mining Machinery. Joy manufacturers all the key elements for the armored face conveyor (AFC) including the head and tail frames, line pans, gear boxes, sprockets, couplings and shearer haulage systems. The JOY AFC design uses cast steel sigma sections with exacting tolerances. This casting technology eliminates ...
Armored Face Conveyor (AFC) is one of the most important machineries in underground mines, which has a direct role in production. Hence, reliability of this machine is very important this paper ...
