Assay Equipment Accessories & Consumables
Tungsten Carbide Grinding Bowl Laboratory Pulverizing Dish Milling Vessel Set
Item Number : KT-TH
Price varies based on specs and customizations
- Material Composition
- 94% WC, 6% Co (Submicron Grade)
- Surface Hardness
- ≥ 90.5 HRA (≥ 1450 HV30)
- Final Analytical Fineness
- < 40 µm (D90 down to < 20 µm)
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Product Overview
Manufactured from premium submicron tungsten carbide consolidated with a cobalt binder matrix, this heavy-duty grinding bowl set delivers rapid, contamination-minimized comminution for exceptionally hard and abrasive laboratory samples. Operating inside high-energy vibratory disc mills and puck pulverizers, the milling vessel harnesses intense multidirectional centrifugal forces to reduce coarse, heterogeneous feed materials to analytical fineness below 40 microns within tens of seconds.
Engineered specifically for geochemical assay laboratories, mining exploration facilities, primary metallurgy, and technical ceramic research, this equipment processes challenging sample matrices such as ferroalloys, quartz, granite, and slag. It provides a non-ferrous grinding environment essential for high-precision X-ray fluorescence, X-ray diffraction, and trace element spectroscopy where extraneous iron contamination must be strictly excluded.
Built with a reinforced stainless steel protective outer shell and precision-lapped sealing interfaces, the assembly withstands severe multi-axis impact stresses and continuous high-frequency vibration without structural fatigue. Its hermetic O-ring sealing mechanism prevents fine dust escape and sample cross-contamination, ensuring reproducible particle reduction, maximum specimen recovery, and dependable service life in demanding, high-throughput testing environments.
Key Features
- Ultra-Dense Tungsten Carbide Formulation: Sintered from high-purity submicron tungsten carbide powder with an optimized 6% cobalt binder phase, this assembly achieves a surface hardness exceeding 90.5 HRA. This extreme material density offers peerless resistance against gouging and abrasive scouring caused by minerals with a Mohs hardness up to 9.5.
- Contamination-Controlled Sample Preparation: Specifically engineered to eliminate parasitic iron, nickel, and chromium cross-contamination typical of standard tool steel vessels, this grinding bowl preserves baseline elemental purity. Analytical results for geological exploration, mining assays, and metallurgical quality control remain uncompromised during subsequent spectroscopic evaluations.
- High-Kinetic Energy Comminution Geometry: The vessel cavity, concentric impact rings, and solid center puck are mathematically proportioned to optimize energy distribution during high-frequency vibration. This dynamic arrangement generates immense compression and shearing forces, reducing 15 mm feed chunks down to an analytical fineness of D90 < 40 µm in 60 to 180 seconds.
- Hermetic Fluoroelastomer Sealing Mechanism: Precision-machined circumferential sealing grooves accommodate a resilient Viton O-ring gasket that completely isolates the milling chamber. This hermetic containment prevents fine aerosol loss, protects laboratory personnel from hazardous respirable dust, and permits both dry and wet grinding with organic solvents or deionized water.
- Heavy-Duty Protective Stainless Steel Armor: The inner brittle tungsten carbide bowl is permanently shrink-fitted into an exterior heavy-gauge stainless steel protective casing. This composite configuration absorbs external mechanical shock, guards against edge chipping during handling, and distributes clamping pressures evenly across the vessel structure.
- Dynamic Balancing for Mill Longevity: Every bowl shell, impact ring, and puck is dynamically balanced to tight mass tolerances before final inspection. This strict balance eliminates eccentric harmonic vibration transmission to the vibratory pulverizer motor and main drive bearings, reducing operational noise and extending machinery service intervals.
- Chemical Inertness and Rapid Cleaning: The polished, non-porous tungsten carbide contact faces resist chemical degradation from acidic or basic sample constituents and thermal breakdown up to high operating temperatures. The mirror-finish interior facilitates rapid turnaround, minimizing sample carryover between batches through simple ultrasonic bathing or dry abrasive scrubbing.
- Standardized Clamp Interfacing: Engineered with universally compatible exterior dimensions, this milling set seamlessly integrates into single-chamber or multi-chamber vibratory disc mills featuring manual eccentric, pneumatic, or automated clamping mechanisms.
Applications
| Application | Description | Key Benefit |
|---|---|---|
| Geological Exploration & Geochemistry | Rapid pulverization of bulk rock samples, core drillings, river silts, and silicate minerals for comprehensive trace element mapping. The milling system breaks down resistant quartz, feldspar, and granite cores without introducing iron background noise that distorts sensitive spectroscopic measurements. | Eliminates Fe and Cr interference while achieving <40 µm analytical fineness for precise XRF, ICP-OES, and ICP-MS geochemical surveys. |
| Mining Ore Assay & Grade Control | Continuous comminution of high-grade run-of-mine ores, concentrates, and tailings, including chromite, ilmenite, bauxite, and gold-bearing pyrite. The dense carbide milling elements crush heterogeneous mineral rocks into fine, homogenous test specimens required for reliable daily assaying. | Withstands aggressive 24/7 abrasive wear, maintaining consistent volume capacity and zero sample retention across extreme test regimes. |
| Cement, Clinker & Raw Meal Analytics | Daily quality control grinding of hard Portland cement clinker, gypsum, limestone, and raw feed materials prior to automated pellet pressing and X-ray analysis. The high-energy disc action pulverizes unground nodules into uniform micro-particulate powders in under two minutes. | Delivers exceptionally narrow particle size distributions essential for repeatable fusion beads, pressed pellets, and ASTM/ISO standard compliance. |
| Ferrous & Non-Ferrous Metallurgy | Pulverization of brittle ferroalloys, blast furnace slags, electric arc furnace (EAF) dust, and metal-matrix composites for production heat analytics. The high kinetic impact easily disintegrates difficult materials like ferrosilicon, ferromanganese, and titanium sponge. | High impact toughness prevents puck shattering when processing extremely tough, dense ferroalloy chunks up to 15 mm starting size. |
| Advanced Ceramics & Superhard Materials | Processing of raw technical ceramic formulations, including silicon carbide, boron nitride, alumina, and zirconia precursor powders. The milling chamber facilitates both intensive dry comminution and wet solvent-based blending to disperse micro-additives homogeneously. | Ultra-high hardness (HRA >90.5) resists rapid groove gouging, preserving sample stoichiometry and preventing unwanted phase contamination. |
| Environmental Waste & Incineration Ash | Preparation of municipal solid waste bottom ash, incinerator fly ash, vitrified waste, and heavy-metal-laden soils for hazardous material leaching tests. The hermetic sealing system protects operators from toxic respirable particulates and volatile compounds. | Complete seal integrity prevents aerosol dust escape and ensures complete recovery of toxic trace metals for EPA regulatory validation. |
| Glass, Glaze & Enamel Manufacturing | Comminution of raw silica sands, cullet glass, ceramic frits, and enamel fluxes to verify batch composition and melting kinetics. The non-porous tungsten carbide interior prevents moisture entrapment and cross-color contamination across diverse formulations. | Super-smooth ground interior allows rapid mechanical brush-down and solvent rinsing, ensuring zero cross-batch contamination in fast-paced QC labs. |
Technical Specifications
Dimensional and Capacity Specifications
| Parameter | KT-TH-50 | KT-TH-100 | KT-TH-250 | KT-TH-500 |
|---|---|---|---|---|
| Item Number | KT-TH-50 | KT-TH-100 | KT-TH-250 | KT-TH-500 |
| Nominal Capacity | 50 ml | 100 ml | 250 ml | 500 ml |
| Recommended Sample Feed Volume | 10 – 35 ml | 20 – 70 ml | 50 – 180 ml | 100 – 350 ml |
| Maximum Initial Feed Particle Size | < 5 mm | < 8 mm | < 12 mm | < 15 mm |
| Final Particle Size (D90) | < 40 µm | < 40 µm | < 40 µm | < 40 µm |
| Internal Grinding Elements | 1 Solid Puck | 1 Puck + 1 Ring | 1 Puck + 1 Ring | 1 Puck + 2 Rings |
| Outer Dimensions (Diameter × Height) | 130 × 75 mm | 145 × 85 mm | 200 × 105 mm | 240 × 125 mm |
| Typical Grinding Duration | 30 – 90 seconds | 45 – 120 seconds | 60 – 180 seconds | 90 – 240 seconds |
| Outer Protective Shell Material | AISI 304 Stainless Steel | AISI 304 Stainless Steel | AISI 304 Stainless Steel | AISI 304 Stainless Steel |
| Gasket Sealing Type | Viton Double O-Ring | Viton Double O-Ring | Viton Double O-Ring | Viton Double O-Ring |
| Applicable Grinding Medium | Dry or Wet (Solvent/Water) | Dry or Wet (Solvent/Water) | Dry or Wet (Solvent/Water) | Dry or Wet (Solvent/Water) |
Material and Mechanical Characteristics
| Material Property | Nominal Value | Standard / Test Method |
|---|---|---|
| Matrix Composition (Tungsten Carbide, WC) | 94.0 wt% (±0.5%) | ASTM B760 / EDX Spectroscopy |
| Binder Composition (Cobalt, Co) | 6.0 wt% (±0.5%) | ASTM B760 / EDX Spectroscopy |
| Average Carbide Grain Size | 0.8 – 1.2 µm (Submicron Grade) | Metallographic Scanning Electron Microscopy |
| Surface Hardness | ≥ 90.5 HRA (≥ 1450 HV30) | ASTM E18 / ISO 3738 |
| Sintered Material Density | 14.85 – 15.05 g/cm³ | ASTM B311 Archimedes Principle |
| Transverse Rupture Strength (TRS) | ≥ 2400 MPa | ASTM B406 / ISO 3327 |
| Compressive Strength | ≥ 4500 MPa | ASTM E9 Standard Test Method |
| Modulus of Elasticity (Young's Modulus) | 620 – 650 GPa | Ultrasonic Pulse-Echo Measurement |
| Thermal Conductivity | 80 – 100 W/(m·K) at 20°C | Laser Flash Method |
| Maximum Continuous Temperature | 400°C in Air / 600°C in Inert Gas | Standard Laboratory Operating Limit |
Operational Guidelines and Mill Compatibility
| Operational Parameter | Specification & Recommendations |
|---|---|
| Mill Compatibility | Laboratory vibratory disc mills, puck pulverizers, cup mills, and swing mills |
| Clamping Systems | Compatible with pneumatic clamping devices, eccentric manual toggle clamps, and threaded mechanical spindles |
| Operating Frequency Range | 700 to 1450 rpm (11.6 to 24.2 Hz) standard vibrational operating speeds |
| Chemical Resistance | Highly resistant to alcohols, acetone, hexane, neutral solvents, and mild organic acids; avoid hydrofluoric acid |
| Cleaning Procedures | Ultrasonic bath cleaning with volatile solvents, dry wiping, or brief pre-milling conditioning with pure quartz sand |
Why Choose This Product
- Submicron Hot Isostatic Pressing Metallurgy: Manufactured using pure submicron tungsten carbide consolidated through hot isostatic pressing, this grinding assembly eliminates micro-voids, porosity, and cobalt segregation. This microstructural uniformity maximizes fracture toughness, preventing cracking or spalling under severe impact forces generated by high-frequency pulverizers.
- Precision Balanced Dynamic Performance: Each vessel, concentric impact ring, and solid puck is precision-machined and dynamically balanced to exact mass tolerances. This balanced symmetry dampens harmonic vibration transmission into the mill drive train, extending drive bearing life, lowering operational noise, and ensuring identical grinding kinetics across batches.
- Unrivaled Chemical Purity for Trace Analysis: By completely eliminating iron, chromium, and nickel wear contamination typical of conventional steel bowls, this equipment maintains baseline sample integrity. Analytical laboratories can confidently perform sub-ppm elemental quantification via XRF, XRD, and ICP-OES spectroscopy without distortion from tool wear.
- Reinforced Dual-Layer Protective Architecture: The heavy-gauge stainless steel outer jacket permanently encases the dense carbide inner bowl, absorbing external handling shocks and distributing clamping stresses uniformly. This robust armor design protects the premium carbide core against edge chipping, ensuring prolonged operational life in rigorous production environments.
Contact our technical application specialists today to request a quotation or to determine the optimal vessel capacity and grinding parameters for your laboratory sample preparation requirements.
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