How can trace metal contamination be avoided during grinding?

By selecting non-metallic or chemically inert grinding jars such as high-purity Zirconia (ZrO2), Agate (SiO2), or Tungsten Carbide depending on the elements to be quantified via XRF or ICP.

Does Orbit supply standard sieves with calibration certificates?

Yes. Orbit supplies precision woven wire and perforated plate test sieves certified to ISO 3310-1 and ASTM E11 with individual calibration certificates.

Which mill is right for XRF sample preparation?

A ring mill / pulveriser that takes crushed material below 75 µm produces the flat, homogeneous pellet XRF requires. We will recommend the vessel material based on your sample hardness and contamination limits.

Do you supply replacement sieves and mill parts?

Yes — test sieves (ISO 3310 / ASTM E11), sieve shakers, mill rings, sets, vessels and gaskets are stocked as consumables and dispatched nationwide.

How do I avoid cross-contamination between samples?

Use dedicated vessels per sample type, clean between runs with brushed or rinsed cycles, and run a blank. We can advise on a cleaning protocol and supply separate vessels for different materials.

Milling & Pulverising | Laboratory Mills & Sample Preparation India

Q: How do I choose between planetary ball mills and disc pulverisers?

Planetary ball mills provide extremely high energy impact and are ideal for colloidal wet grinding, mechanical alloying, and hard materials down to nanometer or sub-micron sizes. Disc pulverisers are designed for rapid, high-throughput dry comminution of medium-hard materials (ores, cement, coal) down to standard 75 µm analytical fineness.

Technical Sample Preparation & Comminution Methodology

Accurate analytical results rely entirely on representative sample preparation. Laboratory mills, jaw crushers, and disc pulverisers reduce bulk ores, coal, cement clinker, and industrial raw materials into fine, homogenous powders with controlled particle size distributions. Orbit Technologies supplies heavy-duty comminution equipment and sieve shakers engineered to prevent sample contamination, preserve volatile fractions, and prepare specimens for XRF pressed pellets, fusion beads, and ICP acid digestion.

Measurement Principles & Technology

Planetary Centrifugal Grinding: Sun wheels rotate bowls in opposing directions, creating high-energy Coriolis forces and grinding ball impacts that pulverize hard materials down to sub-micron fineness.
Contamination-Free Grinding Bowls: Jars and grinding balls manufactured in tungsten carbide, zirconium oxide, agate, and stainless steel prevent trace element contamination.
Electromagnetic 3D Sieving: Tri-dimensional throwing motion distributes particles evenly across the entire sieve surface for reproducible sieving kinetics.
Heavy-Duty Primary Crushing: Oscillating jaw crushers reduce rock and ore chunks down to manageable 2 mm granules prior to secondary fine pulverization.

International Standards & Regulatory Compliance

ISO 3310-1Compliance

Test Sieves — Technical Requirements and Testing

Manufacturing tolerance standards for woven wire cloth test sieves.

ASTM E11Compliance

Standard Specification for Woven Wire Test Sieve Cloth and Test Sieves

Global particle size distribution testing reference.

ASTM D2013Compliance

Standard Practice for Preparing Coal Samples for Analysis

Standardized crushing, milling, and dividing procedures for solid mineral fuels.

ISO 13909Compliance

Hard Coal and Coke — Mechanical Sampling

Protocols for representative sample reduction and preparation.

Core Industrial Applications

Mining & Geological Exploration

Crushing drill core samples, rocks, minerals, and pulverizing samples for XRF assay.

Cement & Building Materials

Grinding clinker, raw meal, gypsum, and concrete specimens for routine QA/QC testing.

Pharmaceuticals & Nanotechnology

Mechanical alloying, wet colloidal milling, and fine grinding of active pharmaceutical ingredients.

Battery & Energy Materials

Homogenizing cathode precursor powders and carbon nanotube dispersion.

Laboratory Selection Checklist

Feed Material Hardness (Mohs): Jaw crushers and tungsten carbide bowls for hard/brittle ores (Mohs 7-9); knife mills for soft/fibrous agricultural products.

Target Fineness: Planetary ball mills achieve sub-micron particle sizes; disc pulverisers provide typical analytical fineness (<75 µm / 200 mesh).

Grinding Media Material: Select grinding bowl materials that do not contain elements targeted during subsequent elemental analysis.

Why Laboratories Across India Partner with Orbit Technologies

Established in Hyderabad in 1995, Orbit Technologies manufactures and represents world-class scientific instruments. As Parr Instrument Company's exclusive partner and #1 Global Dealer for new orders, we provide full end-to-end support: from testing application guidance and custom engineering to factory-certified installation, NABL-traceable calibration, and lifetime spares.

Pan-India Support Network

14 Dedicated Sales & Service Branch Locations:

Hyderabad · Delhi · Mumbai · Kolkata · Chennai · Bangalore · Pune · Nagpur · Lucknow · Baroda · Bhubaneswar · Bilaspur · Raipur · Ranchi

Direct Sales Desk:+91 - 81438 85547

Common Technical Questions: Milling & Pulverising

Key questions on testing standards, operating methods, maintenance, and calibration.