Conveyor Chain in Coal Mining: The Role of the Feeder Breaker & How VOLER Helps

In coal mining operations, chain is the hard-working component that keeps the whole material handling chain moving — from run-of-mine (ROM) coal all the way to barge loading. When one chain fails, the entire line can stop, and the production loss per hour is enormous. This article covers the coal mining process, which stations run on chain (especially the feeder breaker), the problems operators typically face, and how VOLER helps with reverse engineering, delivery scheduling and budgeting.

Process Flow and the Stations That Use Chain

Coal generally flows through several stages: mining (ROM) → sizing → stockpiling → reclaiming → transfer → crushing → loading. Several key stations along this flow depend on conveyor chain:

• Feeder Breaker — receives ROM coal from the hopper or dump, drags it with heavy drag chain while breaking up large lumps. The most critical and most heavily loaded station.
• Apron Feeder — feeds large lumps from the hopper to the crusher or next conveyor under impact loading.
• Drag Chain Conveyor / Redler — moves fine coal or reject inside an enclosed, dust-tight casing.
• Armored Face Conveyor (AFC) — in underground (longwall) mines, running very high-strength flight chain.
• Scraper / Chain Conveyor — for reject, ash or material at transfer points.
• Reclaim Feeder — draws coal from beneath the stockpile.

The Feeder Breaker: Heart of ROM Coal Handling

A feeder breaker does two jobs: it feeds (controlling the coal feed rate) and it breaks (sizing oversize lumps so they can safely enter the crusher or conveyor). Its chain — usually a dual-strand drag chain with flight bars — must drag ROM material mixed with hard rock while absorbing impact from dump trucks. The main components are forged chain links, pins and bushings, flight bars and drive sprockets.

Common Problems

Because it works under the heaviest conditions, the feeder breaker faces recurring issues:

• Chain wear and elongation: abrasion from ROM coal and rock wears pins and bushings quickly; the chain stretches and no longer fits the sprocket.
• Worn or bent flight bars: impact loads damage the flights and reduce dragging efficiency.
• Sudden chain breakage: leading to unplanned downtime — and in coal mining, one hour stopped can cost hundreds of millions of rupiah.
• Very long OEM lead times: many feeder breakers are imported (Stamler, Joy and similar). Replacement chain can take 3–6 months to import.
• High cost and currency risk: expensive OEM pricing plus import duty, freight and exchange-rate swings.

How VOLER Helps

As specialists in forged conveyor chain and custom material handling, VOLER solves these problems end to end — not just selling chain, but securing your production continuity.

1. Reverse Engineering

Your feeder breaker chain is no longer produced, the OEM is hard to reach, or all you have left is an old sample? Through reverse engineering, VOLER precisely measures the old chain and flights (or works from drawings), specifies the right material and heat treatment — often more wear-resistant than the original — and remanufactures it to fit your existing sprockets and system. No more dependence on the OEM.

2. Reliable Delivery Schedules

Because we manufacture locally in Indonesia, lead times are far shorter than importing. VOLER commits to a clear production and delivery schedule from the start, can expedite urgent orders, and offers a buffer stock programme — holding spare chain and flights against your production plan so replacement happens during a scheduled shutdown, not when a chain breaks mid-production.

3. Controlled Budgeting

VOLER helps you plan realistic, cost-effective budgets:

• More competitive pricing with no import duty, international freight or currency risk.
• Transparent cost comparison between imported OEM chain and VOLER chain, including Total Cost of Ownership (longer life = lower cost per tonne).
• Phased or scheduled procurement aligned with your budget and maintenance cycle.
• Lower downtime cost — the biggest value is often not the chain price but production that keeps running.

Conclusion

In coal mining, chain — especially on the feeder breaker — is the component that decides uptime. By combining precise reverse engineering, dependable local delivery and controlled budgeting, VOLER helps coal mines secure production without being trapped by long import lead times and expensive OEM pricing. See also our solutions for apron feeders, drag chain conveyors and scraper conveyors.