Zhengzhou Dongding Machinery recently commissioned a complete turnkey coal slime drying and granulating line for a long-term partner in Indonesia, hitting the client's capacity and final-moisture targets on the very first trial run.
Project Overview
The Indonesian client processes coal slime from a local washing plant and needed a reliable way to turn a high-moisture by-product into a saleable fuel. Dongding engineered, manufactured and delivered a 15 t/h rotary drum drying line — from wet-cake feed through dewatering, drying, dust collection and finished-product handling.
The raw material enters at roughly 35–40% moisture and leaves the line at below 10%, ready for briquetting and direct combustion. Every system was pre-assembled and load-tested at our Zhengzhou workshop before dispatch, cutting on-site installation time by nearly half.
Tailor-Made Process Design
Because coal slime is sticky and agglomerates easily, a standard dryer clogs and wears quickly. Our engineers designed a dedicated self-cleaning feed and dispersing system so the wet cake enters the drum evenly and never builds up on the shell.
- Feed and metering system with a breaking screw conveyor
- Self-cleaning rotary drum dryer with adjustable lifting flights
- Hot-air furnace with PID-controlled burner
- Cyclone and bag filter dust collection
- Automatic PLC control cabinet with remote monitoring
Commissioning and After-Sales
Dongding dispatched a senior commissioning team to the site for installation supervision, cold and hot trials, and operator training. After three days of stable running, the line was handed over with all performance guarantees met.
“The line has run smoothly since commissioning — Dongding's engineering support and spare-parts response have been excellent.”
— Production Manager, Indonesian plant
Looking Ahead
With this delivery, Dongding strengthens its presence in Southeast Asia's coal-drying market. We continue to expand our local service network to support customers with commissioning, training and lifetime maintenance.
