Ash and Volatile Matter Crucibles and Crucible Racks for Laboratory Proximate Analysis

Product Overview

This comprehensive thermal analysis consumable suite provides the core hardware required for standard proximate analysis of solid fuels, mineral ores, and carbonaceous materials. Comprising high-temperature volatile matter crucibles, heavy-duty nickel-chromium wire crucible racks, specialized rectangular muffle furnace ash dishes, and ground-glass moisture weighing bottles, this integrated system delivers uncompromising thermal endurance and gravimetric consistency. Every component is precision-engineered to endure severe thermal cycling, rapid furnace insertion, and precise analytical balance taring, providing testing laboratories with an end-to-end apparatus suite for standardized moisture, ash, and volatile matter determination.

Engineered specifically for demanding quality assurance and testing environments, the equipment serves coal-fired power stations, commercial assay laboratories, coking plants, metallurgical smelters, biomass processing facilities, and cement manufacturing operations. These vessels and handling racks conform to rigorous standard protocols, ensuring that sample combustion, volatile pyrolysis, and moisture desiccation occur under strictly uniform thermodynamic and aerodynamic conditions. By standardizing sample exposure, this laboratory hardware enables procurement specialists and analytical chemists to achieve highly reproducible proximate analysis data day after day.

Reliability under elevated temperatures is paramount in high-throughput testing environments. The high-purity refractory ceramic crucibles and dishes feature exceptional thermal shock resistance, allowing instantaneous introduction into muffle furnaces operating up to 1200°C without mechanical failure or catastrophic cracking. Simultaneously, the specialized nickel-chromium alloy racks withstand continuous high-temperature oxidative environments without sagging, flaking, or scaling. This steadfast operational resilience guarantees long service life, minimizes consumable replenishment costs, and safeguards critical analytical data from contamination or sample spillage.

Key Features

• 1200°C High-Temperature Thermal Resistance: Engineered from specialized high-purity refractory ceramics, the volatile matter crucibles reliably operate at sustained temperatures up to 1200°C. This exceptional thermal shock tolerance permits direct insertion into and withdrawal from hot muffle furnaces without thermal fracture, ensuring maximum operator safety and continuous testing uptime.
• Oxidation-Resistant Nickel-Chromium Wire Racks: Constructed from industrial-grade nickel-chromium (Ni-Cr) resistance alloy wire, both the volatile crucible rack and the ash dish rack maintain structural stiffness at peak operating temperatures. The alloy forms a self-passivating oxide skin that prevents surface scaling, mass shedding, and thermal embrittlement over thousands of heating cycles.
• Optimized Volatile Matter Pyrolysis Geometry: Featuring a 20 ml volumetric capacity, a 33 mm top outer diameter, an 18 mm bottom outer diameter, and a height of 40 mm, the volatile matter crucible features a precisely matched ceramic lid. This tight-fitting closure prevents oxygen ingress during volatile expulsion, ensuring strict compliance with standard volatile matter pyrolysis conditions.
• Shallow-Profile Muffle Furnace Ash Dishes: Measuring 55 mm in top length, 45 mm in bottom length, 22 mm in width, and 14 mm in height, the rectangular ash boat maximizes surface-area-to-depth ratio. This thin-layer geometry guarantees thorough atmospheric oxygen diffusion across the sample bed, accelerating complete carbon burnout and preventing incomplete combustion cores during ash determination.
• Ergonomic Six-Hole Batch Handling Architecture: Both the 128 × 90 × 50 mm volatile crucible rack and the 135 × 110 × 50 mm ash dish rack feature standard six-aperture configurations. The precision-welded wire frame securely cradles each vessel, preventing tilting or tipping while allowing technicians to transfer six specimens simultaneously into furnace hot zones using standard laboratory tongs.
• Calibrated Analytical and Total Moisture Weighing Vessels: High-precision borosilicate glass weighing bottles provide airtight sample containment during gravimetric moisture analysis. The 40 × 25 mm format is specifically proportioned for 0.9–1.1 g analytical moisture testing samples, while the 70 × 35 mm format accommodates bulk 10–12 g total moisture samples, effectively isolating samples from ambient relative humidity fluctuations.
• Chemically Inert and Non-Hygroscopic Ceramic Matrix: The refined ceramic surfaces resist chemical attack by molten coal ash constituents, basic slag fluxes, and volatile sulfur oxides. The non-porous structure exhibits virtually zero moisture absorption after cooling, eliminating tare mass fluctuation and guaranteeing sub-milligram balance precision.
• Precision Dimensional Uniformity: Manufactured under tight dimensional tolerances, each crucible, dish, rack, and bottle exhibits consistent physical profiles and predictable thermal mass. This uniformity promotes balanced heat conduction across all six sample positions within the muffle furnace, eradicating temperature gradient discrepancies during critical analytical runs.

Applications

Technical Specifications

Operational and Metallurgical Characteristics

Why Choose This Product

• Superior Thermal Fatigue Resistance: Unlike conventional ceramic crucibles that experience sudden spalling or micro-cracking when subjected to thermal shock, these ceramic vessels and Ni-Cr racks undergo rigorous thermal formulation to ensure long-term durability across sustained 1200°C heating cycles.
• Heavy-Gauge Oxidation-Resistant Metallurgy: The nickel-chromium wire racks eliminate the severe scaling, flaking, and structural sagging typical of basic stainless steel or iron racks, protecting analytical samples from foreign iron oxide contamination and preserving rack geometry.
• Absolute Gravimetric Integrity: Ultra-low porosity vitrified surfaces prevent molten slag infiltration and eliminate post-cooling moisture absorption inside desiccators, guaranteeing stable baseline tare weights and highly repeatable balance determinations.
• Direct Compliance with Standardized Test Methods: Fabricated in strict accordance with the geometric, volumetric, and material specifications required by ISO 562, ISO 1171, ASTM D3172, and GB/T 212 standards, simplifying quality audits and ensuring seamless laboratory cross-validation.
• Integrated End-to-End Analysis Platform: Supplying matching volatile crucibles, shallow incineration dishes, precision-welded six-hole racks, and calibrated weighing bottles from a single engineering manufacturer eliminates mechanical fit discrepancies and streamlines laboratory replenishment.

Contact our technical sales team today to request a quotation, discuss bulk laboratory consumable schedules, or configure specialized rack and crucible solutions tailored to your high-temperature testing furnaces.

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