Egypt Iron Ore Laboratory Sample Preparation Project: Ring Puck Mill and Single Stage Hammer Crusher

An iron ore laboratory in Egypt required a complete sample preparation setup for XRF chemical analysis of magnetite ore. The scope covered two preparation stages: coarse crushing of dry magnetite lumps, followed by fine pulverising to a powder fine enough for X-ray fluorescence analysis. The line pairs a single-stage laboratory hammer crusher with a ring & puck mill.

• Location: Egypt
• Sample type: Iron ore (magnetite)
• Analysis method: XRF (X-ray fluorescence) chemical analysis
• Goal: reliable, reproducible sample preparation from raw lumps to analytical powder

The laboratory needed to reduce hard, dry magnetite from large lumps down to a fine, homogeneous powder suitable for XRF spectrometry. Two requirements drove the design:

• Coarse crushing: reduce dry magnetite blocks of 50-70 mm to 1-2 mm in a single crushing stage;
• Fine pulverising: grind the 1-2 mm material to below 75 microns (0.075 mm), the fineness needed for accurate XRF chemical analysis, while processing several samples in parallel.

To match these requirements, the following equipment was specified.

Raw magnetite from the mine is first fed to the single-stage laboratory hammer crusher. Because the crusher reduces 50-70 mm blocks to 1-2 mm in one pass, the laboratory avoids a second crushing step and keeps the preparation line short. The 1-2 mm product is then charged into the 4MZ-200 ring & puck mill.

The 4MZ-200 uses four independent sealed grinding bowls, each rated for a 200 g magnetite sample. This allows up to 4 x 200 g to be pulverised in a single run and keeps the samples separated to prevent cross-contamination. The mill reduces the material to below 75 microns (0.075 mm), producing the homogeneous powder that XRF analysis requires.

• Complete workflow: Coarse crushing and fine pulverising are covered on site, from 50-70 mm lumps to below-75-micron powder.
• Higher throughput: The four-bowl ring & puck mill processes up to four 200 g samples per run, matching the laboratory's parallel sample preparation needs.
• Reliable analysis: Sealed bowls and consistent fine grinding support homogeneous, contamination-free samples for dependable XRF results.
• Matched pairing: The 1-2 mm output of the hammer crusher feeds directly into the ring & puck mill, forming a simple two-stage preparation line.

XRF analysis uses only a very small portion of each sample, so the material must be fine and homogeneous to be representative. Grinding to below 75 microns (0.075 mm) gives a consistent powder and improves the accuracy and repeatability of the chemical result.

Four independent sealed bowls let the laboratory pulverise up to four samples of 200 g each in a single run, increasing throughput. Sealed bowls also prevent cross-contamination between samples, which is important for reliable analysis.

Yes. A single-stage laboratory hammer crusher reduces dry magnetite blocks of 50-70 mm to 1-2 mm in one pass, which is the ideal feed size for the ring & puck mill and avoids the need for a second crushing stage.

Y&X Beijing Technology Co., Ltd. supplies laboratory crushing, grinding and pulverising equipment for mining and mineral testing laboratories, including laboratory hammer crushers, ring & puck mills, disc mills and related consumables, with configuration advice based on each project's sample type, feed size and target particle size.

Planning a similar iron ore laboratory? Contact us to discuss your sample preparation requirements.