MingShen Science FC-6 Rapid Float-Sink Dewatering Centrifuge

Overview

The MingShen Science FC-6 Rapid Float-Sink Dewatering Centrifuge is a purpose-built laboratory-scale centrifugal dewatering apparatus engineered for coal preparation laboratories conducting density-based separation (float-sink) analysis per ASTM D3174, ISO 1171, and GB/T 477–2018 standards. It operates on the principle of centrifugal force generation via high-speed rotation of a perforated stainless-steel drum, enabling rapid mechanical removal of surface moisture from coal samples after float-sink testing in heavy media solutions (e.g., zinc chloride or cesium formate). Unlike general-purpose centrifuges, the FC-6 integrates structural and operational safeguards specific to coal lab workflows—including corrosion resistance to halide-based dense media, controlled acceleration to prevent sample displacement, and mechanical interlock systems preventing lid access during operation. Its design prioritizes repeatability in moisture retention measurement, supporting accurate ash and sulfur content determination downstream.

Key Features

• Stainless steel (AISI 304) inner drum with uniform 3-mm perforations for optimized drainage and minimal sample loss
• V-belt drive system with stepped-start pulley mechanism ensuring smooth, low-torque acceleration—reducing mechanical stress on coal particles and minimizing fines generation
• Integrated mechanical lid interlock that physically disables motor activation when the cover is open, complying with IEC 61000-6-2 EMC and basic functional safety expectations for Class I electrical equipment
• Centrifugal braking system providing controlled deceleration (< 45 s full stop from max speed), eliminating coast-down hazards and enabling timely sample retrieval
• Grounded metal chassis with dedicated earth terminal (M6 screw) meeting IEC 61000-6-3 requirements for laboratory electromagnetic compatibility and operator safety
• Modular accessory set including one calibrated float-sink bucket (with volume markings), one stainless steel捞勺 (sample scoop), and corrosion-resistant drip tray

Sample Compatibility & Compliance

The FC-6 accommodates coal samples ranging from coarse (+6 mm) to fine (<0.5 mm) fractions, provided total mass remains below 2.0 kg per cycle. It is compatible with common dense media solutions used in coal washability analysis, including aqueous ZnCl₂ (up to 2.0 g/cm³), CsHCOO, and magnetite suspensions. The stainless-steel drum resists pitting corrosion under repeated exposure to chlorinated media when rinsed promptly post-use. Units are supplied with factory calibration documentation traceable to national metrology institutes (CNAS-accredited reference standards). While not certified to UL/CSA or CE for medical or pharmaceutical use, the FC-6 conforms to GB 4706.1–2005 (Chinese household and similar electrical appliance safety standard) and meets baseline mechanical safety expectations for industrial laboratory equipment under ISO 12100:2010.

Software & Data Management

The FC-6 is a manually operated, non-programmable instrument with no embedded microcontroller or digital interface. All operational parameters—including run time, speed profile, and cycle count—are recorded manually by the user in accordance with GLP-compliant lab notebooks. No electronic data logging, audit trail, or FDA 21 CFR Part 11 compliance is provided. However, its deterministic mechanical behavior (fixed acceleration ramp, consistent final speed, repeatable braking) supports robust manual SOP execution in regulated environments where paper-based records remain acceptable per ISO/IEC 17025:2017 Clause 7.5.2.

Applications

• Routine dewatering of coal samples following ASTM D3174 float-sink analysis for proximate and ultimate analysis
• Preparation of moisture-equilibrated specimens prior to proximate analysis (ASTM D3172) or calorific value testing (ASTM D5865)
• Removal of residual heavy medium from sink/float fractions prior to drying and weighing
• Supporting quality control workflows in coal beneficiation plants, third-party testing labs, and university mining engineering departments
• Complementary use with automated float-sink separators (e.g., MSL-200 series) where rapid offline dewatering is required between density cuts

FAQ

What is the maximum rotational speed of the FC-6?
The FC-6 does not specify or monitor RPM electronically; its motor-driven V-belt system achieves a nominal operating speed optimized for dewatering efficiency and sample integrity—typically in the range of 900–1100 rpm, empirically validated across >10,000 operational cycles in coal labs.
Can the FC-6 be used with organic dense media such as bromoform?
No. Bromoform and other halogenated organics may degrade the nitrile rubber components in the V-belt and bearing seals. Only aqueous-based heavy media (ZnCl₂, CsHCOO, magnetite/water) are recommended.
Is routine maintenance required beyond cleaning and lubrication?
Yes. Quarterly inspection of V-belt tension, drum mounting bolts, and grounding continuity is advised. Bearing lubrication (ISO VG 32 mineral oil) should be performed every 200 operational hours or biannually—whichever occurs first.
Does the unit include overload or thermal protection?
Yes. The motor incorporates a bimetallic thermal cutout rated for continuous duty at 180 W, automatically resetting after cooldown.
How is compliance with laboratory safety audits demonstrated?
Through documented evidence of grounding verification (using a calibrated earth resistance tester), lid interlock functionality testing logs, and preventive maintenance records aligned with ISO/IEC 17025 Clause 6.4.4.