Coal Slime Dryer
Coal slime drying equipment removes the free water left in fine coal slime after mechanical dewatering, and the Baichy single-drum coal slime dryer is published at 1-75 t/h across 27 drum sizes. The published working range is coal slime at a water content of ≤30%; wetter slime is dewatered before it reaches the dryer.
What Moisture Can a Coal Slime Dryer Take?
The single-drum dryer is published for coal slime at a water content of ≤30%, inside a general feed humidity range of 10%~40%, and the coal slime moisture content target is set by what the next process will accept. Slime above the limit is dewatered first: Baichy publishes a reduction from 30-50% moisture in slurry form to 12% to 15% for a coal slime dewatering screen.
Internal structure of the single-cylinder dryer
Particle size decides how tightly the remaining water is held. A peer-reviewed study of coal slime reports that the particles below 10 μm account for 74.71% of the sample, and that this fineness makes the water storage capacity of coal slime stronger, and the water between particles is difficult to remove (Guo et al., ACS Omega 2022, 7(8):6710-6720).
Coal Slime Dryer Specifications
Seven of the 27 published sizes are listed below, from the mid range upwards; the smaller and intermediate sizes are not repeated here. All 27 published sizes share a 3～5% drum gradient and a 700～800 ℃ highest inlet air temperature.
| Model | Volume (m³) | Capacity (t/h) | Rotate Speed (r/min) | Main Motor (kW) |
|---|---|---|---|---|
| Φ1800×12000 | 30.5 | 6.5–8.1 | 2–6 | 18.5 |
| Φ2000×20000 | 62.8 | 9.0–13.6 | 1.5–6 | 22 |
| Φ2200×20000 | 75.9 | 13.0–16.5 | 1.5–6 | 30 |
| Φ2400×20000 | 90.4 | 19.3–24.1 | 1.5–5 | 55 |
| Φ2600×24000 | 127.4 | 27.2–34.0 | 1.5–5 | 75 |
| Φ3000×25000 | 176.6 | 37.7–47.1 | 1.5–5 | 90 |
| Φ3200×25000 | 201 | 42.9–53.6 | 1.5–5 | 110 |
Published capacity depends on material, feed particle size and other factors. The page header lists the single-drum dryer range as 1-75 t/h at 3-110 kW motor power and a maximum feeding size of <10 mm; the largest drum in the table is Φ3200x25000.
How Do You Size a Coal Slime Dryer?
Size a rotary dryer for coal slime from four inputs: inlet moisture in %, target outlet moisture in %, wet feed in t/h, and the heat source available on site. Baichy publishes the heat source as coal, gas, oil or electric heating, at a thermal efficiency of about 50%60% and a power consumption of about 515 kWh/ton of material, both depending on material moisture and system design.
Capacity bands are published separately from the model table: 520 tons/hour for small duties, 20100 tons/hour for small and medium mines, and 100~500 tons/hour for large ore dressing plants. The published maintenance cycle runs daily for bearing lubrication, gear wear and lifting plate fixation, weekly for drum cleaning, monthly for the refractory lining and hot air duct, and annually for support wheels, gears and seals.
Single Drum or Three-Cylinder Dryer for Coal Slime?
A three-cylinder dryer is published for high-moisture and high-viscosity materials, with an overall thermal efficiency increase of as much as 40-50% and a nested cylinder design that cuts the length required by a traditional single-cylinder dryer by approximately two-thirds.
The single-drum dryer is the lower-cost route at the same moisture, and its published limit is explicit: high-viscosity materials such as sludge and heat-sensitive materials are listed as inapplicable, so an agglomerating slime needs a trial before selection. Baichy asks for a 5-10 kg material sample for a free drying experiment that reports moisture, heat consumption and output.
coal slime drying equipment
Where Does a Coal Slime Dryer Sit in a Coal Preparation Plant?
The coal slime dryer sits after dewatering and ahead of blending or sale, and the size of the fine coal stream explains why. United States coal preparation generates 109 million metric tons of coal refuse a year across more than 600 coal preparation plants in 21 coal-producing states, of which about 75 percent is coarse and 25 percent is fine (FHWA-RD-97-148, 1997).
Fine coal refuse is less than 2 mm and is usually discarded in slurry form, and the same source records that fine coal refuse has been recovered for reuse as fuel and burned in cogeneration facilities in the United States. That recovery route is the commercial case for drying slime instead of pumping it to a settling pond.
FAQ: Coal Slime Dryer Selection
1. What is a coal slime dryer?
A coal slime dryer is the rotary drying equipment that removes free water from fine coal slime after dewatering. Baichy publishes the single-drum coal slime dryer from Φ600x6000 to Φ3200x25000, at 1-75 t/h and 3-110 kW.
2. What moisture content can a coal slime dryer handle?
The published working range is coal slime at a water content of ≤30%, inside a general feed humidity range of 10%~40%. Slime above that range is dewatered first: a coal slime dewatering screen is published to take slurry at 30-50% moisture down to 12% to 15%.
3. How much does a coal slime dryer cost?
A coal slime dryer is quoted per project, because drum size, heat source, dust collection and control level change the price of the same duty. Send inlet moisture, target outlet moisture, wet feed in t/h and the heat source to receive a quotation.
4. What is the capacity of a coal slime dryer?
Published capacity runs from 6.5-8.1 t/h on the Φ1800x12000 drum to 42.9-53.6 t/h on the Φ3200x25000 drum, at 18.5 kW and 110 kW respectively. The source page states the output varies with material, feed particle size and other factors.
5. Which dryer suits high-moisture coal slime?
A three-cylinder dryer, which is published for high-moisture and high-viscosity materials with a thermal efficiency increase of as much as 40-50% and about two-thirds less length than a traditional single-cylinder dryer.
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