Sundy SDHCW400×260 Wet Coal Crusher

Overview

The Sundy SDHCW400×260 Wet Coal Crusher is a heavy-duty, laboratory-scale primary and secondary crusher engineered specifically for the size reduction of high-moisture coal and other moderately brittle mineral samples. Designed in strict accordance with GB/T 474–2008 “Methods for Preparation of Coal Samples”, this unit employs a dual-rotor hammer-and-grate crushing mechanism combined with a fully enclosed, sealed chamber architecture to minimize moisture loss and prevent cross-contamination. Unlike conventional jaw or roll crushers, the SDHCW400×260 integrates dynamic anti-caking features—including an integrated feed-throat cleaning device and optimized rotor-sieve kinematics—to ensure consistent throughput and particle-size distribution even when processing coal with surface moisture content exceeding 12%. Its robust mechanical design supports continuous operation in QC laboratories across power generation, coal trading, metallurgical testing, and geological survey institutions where sample integrity, repeatability, and regulatory traceability are critical.

Key Features

• Moisture-resilient crushing architecture: Sealed chamber with minimal internal dead volume and non-stick internal surfaces reduces evaporative moisture loss to <0.3% (measured per ISO 11723:2019 guidelines for coal moisture retention during comminution).
• Anti-clogging feed system: Motor-driven rotary brush assembly at the hopper inlet actively dislodges adhering wet particles, preventing bridging and maintaining nominal throughput under variable feed moisture conditions.
• Modular, tool-free sieve exchange: Insert-type grate plates with standardized mounting allow rapid replacement (≤90 seconds) to accommodate discharge size specifications from ≤6 mm to ≤13 mm—fully compliant with ASTM D2013 and ISO 13909 sampling protocols.
• Wear-resistant critical components: Hammer heads fabricated from alloy steel (HRC ≥58) and grating bars made from Mn13Cr2 high-manganese abrasion-resistant steel ensure >8,000 hours of service life under typical coal QA/QC duty cycles.
• Integrated safety compliance: Full-guard enclosure meeting IP54 ingress protection; emergency stop circuit with mechanical interlock; CE-compliant electrical control panel with overload and phase-failure protection.

Sample Compatibility & Compliance

The SDHCW400×260 is validated for use with bituminous, sub-bituminous, lignite, and anthracite coals, as well as shale, claystone, and low-hardness industrial minerals (Mohs hardness ≤5). It meets mandatory requirements of GB/T 474–2008 for representative sample preparation and is routinely deployed in laboratories accredited to CNAS-CL01 (equivalent to ISO/IEC 17025). The unit’s closed-loop material path and zero-residue chamber design satisfy GLP principles for sample chain-of-custody, eliminating carryover between batches. Optional dust extraction port (Φ120 mm, flanged) enables direct integration with central lab ventilation systems conforming to OSHA 29 CFR 1910.94 and EU Directive 2004/37/EC on carcinogens.

Software & Data Management

As a standalone mechanical instrument, the SDHCW400×260 operates without embedded firmware or digital control interfaces. All operational parameters—including voltage stability, motor current draw, and runtime—are monitored via analog panel meters and logged manually in accordance with paper-based SOPs. For laboratories implementing electronic recordkeeping, the unit is compatible with external data acquisition systems via its 4–20 mA motor load signal output (optional retrofit). While it does not support FDA 21 CFR Part 11 electronic signatures, its mechanical simplicity ensures full auditability during GMP/GLP inspections, with maintenance logs, calibration certificates (for torque wrenches used in hammer tightening), and sieve certification records constituting the complete validation dossier.

Applications

• Routine coal sample reduction prior to proximate analysis (ASTM D3172), ultimate analysis (ASTM D3176), and calorific value determination (ASTM D5865).
• Preparation of reference materials for interlaboratory comparison programs administered by ISO/CEN/IEC standards bodies.
• Size reduction of wet biomass-coal blends in R&D facilities evaluating co-firing characteristics.
• Primary comminution step in automated coal analysis lines where downstream equipment (e.g., pulverizers, dividers) requires feed consistency within ±0.5 mm tolerance.
• Geological core sample fragmentation for ash fusion temperature testing (ASTM D1857) and petrographic analysis.

FAQ

What moisture range is the SDHCW400×260 rated for?
It is validated for coal samples with total moisture content up to 18% (as received basis), with optimal performance observed between 8–15% surface moisture.
Can the discharge size be adjusted during operation?
No—sieve plate replacement requires shutdown and lockout/tagout (LOTO) procedures per OSHA 1910.147. However, multiple pre-calibrated sieve sets can be staged for rapid changeover.
Is third-party calibration available for this unit?
Yes—Sundy-certified technicians provide annual verification of throughput rate, discharge size distribution (via Tyler mesh analysis), and motor thermal stability under load.
Does the unit include dust suppression?
It provides a dedicated 120 mm diameter duct port compatible with standard lab cyclone or baghouse collectors; no built-in misting or HEPA filtration is integrated.
What documentation is supplied with delivery?
Factory test report, GB/T 474–2008 conformance statement, mechanical drawing package, spare parts list, and preventive maintenance schedule aligned with ISO 13374 condition monitoring standards.