Coal
Bituminous Coal · Anthracite · Lignite · Thermal Coal · Metallurgical Coal
Coal is a carbonaceous solid formed from ancient plant material subjected to heat and pressure over millions of years. It exists in various grades, ranging from lignite to anthracite, each differing in carbon content, hardness, and moisture. Coal is dense, abrasive, and dusty, and can generate explosive atmospheres when handled in fine particulate form. KWS designs conveying and feeding systems that manage coal safely with robust construction, dust containment, and explosion protection.
Overview
Chemical Formula
Common Names
Common Forms
Applications
- Electric power generation (thermal coal)
- Steelmaking and metallurgical coke production
- Cement and lime kilns as fuel source
- Chemical feedstock for gasification and liquefaction processes
Material Characteristics
| Property | Value / Description |
|---|---|
| Common Forms | Crushed Coal, Pulverized Coal, Lump Coal |
| Bulk Density | 45–85 lb/ft³ (varies by grade and moisture content) |
| Flow Behavior | Free-flowing to cohesive; can bridge when wet or compacted |
| Abrasiveness | High causes significant wear on metal surfaces |
| Corrosiveness | Moderate may contain sulfur and acidic compounds |
| Dust Potential | Very High fine coal dust is combustible and explosive |
Handling Challenges
- Severe abrasion and wear on screws, housings, and liners
- Combustible and explosive dust requiring enclosure and suppression systems
- Caking and bridging from moisture or freezing conditions
- Corrosion due to sulfur and acidic compounds
- Degradation of material from excessive impact or crushing
Summary
Coal requires heavy-duty conveying systems designed for abrasion resistance, dust control, and explosion protection. KWS Manufacturing provides engineered solutions—including screw conveyors, drag conveyors, and rotary feeders—constructed from wear-resistant materials for dependable and safe performance.
With extensive experience handling fuels and abrasive minerals, KWS ensures efficient, durable, and compliant operation for coal conveying and storage systems.
