Trial Overview

• Trial Date: September 23, 2026

• Location: Guoxin Equipment Testing Workshop

• Target Raw Material: Fine Anthracite Coal Powder / Coal Slime

• Core Machinery: Wheel-Pan Edge Runner Mixer, Hydraulic Roller Briquette Press, Batch Drying Test Cabinet

• Briquette Geometry: Pillow / Oval Shape (Goose-Egg Form)

• Target Application: Industrial Boiler Fuel, Commercial Heating, Gasification Feedstock

1. Material Challenge & Processing Objective

Fine anthracite coal dust and coal washing slime generated during crushing, screening, and mining operations pose significant handling challenges:

• Combustion Efficiency Loss: Fine coal powder blocks airflow when loaded directly into industrial boilers or gasifiers, leading to incomplete combustion and high carbon loss in ash.

• Storage & Dust Pollution: Loose anthracite dust creates severe air pollution during transport and windage loss during outdoor storage.

Forming anthracite coal dust into dense, uniform pillow-shaped briquettes restores bed permeability in furnaces, prevents dust entrainment, and converts low-value coal fines into high-density commercial fuel.

2. On-Site Trial Workflow

The September 23 workshop testing validated a complete 4-step preparation, compaction, and drying evaluation process:

Fine anthracite dust was loaded into a wheel-pan edge runner mixer. Liquid binder was added directly to the coal powder. The heavy grinding wheels kneaded the mixture to crush minor lumps, coat every coal particle uniformly, and develop necessary plasticity for pressing.

Step 2: High-Pressure Hydraulic Compaction

The conditioned coal mixture was discharged from the mixer and fed into the hopper of the compact Guoxin roller press. Synchronized counter-rotating rollers equipped with precision oval pockets compressed the powder under high pressure.

Step 3: Slatted Chute Screening & Green Strength Inspection

Freshly pressed pillow-shaped briquettes were discharged continuously onto a short belt conveyor. The briquettes passed across an inclined slatted chute that separated loose edge flash, allowing clean, intact briquettes to fall into collection trays. Manual inspection confirmed smooth surfaces, sharp mold seams, and high initial green strength.

Step 4: Laboratory Batch Drying Verification

Trays filled with green coal briquettes were transferred into a temperature-controlled drying cabinet. This step verifies the moisture reduction rate and final structural strength required for full-scale industrial continuous belt dryer sizing.

3. Production Line Technical Specifications

4. Key Performance Results

1. Homogeneous Binder Integration: The wheel-pan mixer ensured complete liquid binder dispersion without localized wet spots, reducing binder consumption while maintaining structural integrity.
2. Clean Pocket Mold Release: Precision CNC-milled roller pockets delivered clean briquette ejection with zero sticking or surface deformation during continuous discharge.
3. High Green Strength: Green briquettes withstood drop impacts immediately after pressing, ensuring minimal breakage during transfer to drying systems.