Dolomite Powder FAQ: Specifications, Ordering and Support Questions

Whether you are sourcing this mineral powder for the first time or evaluating a new supplier, the questions below cover the specifications, applications and ordering details you need to make a confident purchasing decision.

What is dolomite powder?

It is an anhydrous carbonate mineral powder composed mainly of calcium carbonate and magnesium carbonate — a natural double salt of the two. In its pure form the material is white with a glassy lustre. The crystal structure is compact with relatively few impurities, giving it a smooth surface, good whiteness and uniform particle size. Chemical properties are stable: it does not change in air and is almost insoluble in water. Mohs hardness falls in the 3–4 range and specific gravity is 2.8–2.9.

What mesh sizes (fineness grades) are available?

Standard grades are 325 mesh, 500 mesh, 600 mesh, 1 000 mesh and 3 000 mesh. Custom fineness grades can also be produced to match specific customer requirements. Finer grades (e.g., 1 000–3 000 mesh) are typically chosen where high surface area or a tight particle-size distribution is required, such as in coatings, rubber compounding or specialty ceramics.

Which industries and applications does it serve?

This is a multi-sector industrial mineral with documented uses across:

• Glass & ceramics — raw material for advanced glassware, medical bottles, optical glass and ceramic batches.
• Metallurgy & refractories — basic refractory material, blast-furnace iron flux, steelmaking slag agent, kiln-industry ingredient.
• Construction materials — cement raw material; used in the production of magnesium oxychloride cement, magnesium hydroxide cement and magnesium sulfate cement.
• Coatings & pigments — functions as a white pigment filler in coating formulations.
• Rubber — added to natural and synthetic rubber compounds to improve the strengthening performance of the finished products.
• Agriculture & environment — applied in agricultural and environmental-protection contexts.
• Chemical & medical — used as a chemical-industry input and in certain medical applications.

What are the key physical and chemical properties buyers should know?

The compact crystal structure and low impurity level make the material well suited to applications where chemical stability and consistent particle morphology are important.

Why is it used in magnesium cement production?

Calcined (flame-separated) material yields a caustic powder used to prepare magnesium oxychloride cement with improved stability. The resulting non-hydraulic cementing materials — magnesium hydroxide cement and magnesium sulfate cement included — share these documented advantages: high compressive and flexural strength, strong adhesion, good elasticity, wear resistance, convenient moulding, low energy consumption and corrosion resistance.

Can specifications be customised, and how do I request a sample?

Lingshou County Fangzhishun Mineral Products Co., LTD. states that mesh specifications can be customised according to customer needs. Professional proofing engineers handle sample processing and personalised design requirements. Contact the supplier directly to discuss target fineness, purity requirements and order volume, and to request a sample for laboratory evaluation before placing a bulk order.

What should I include in an inquiry?

To receive an accurate quotation and ensure the right grade is supplied, include:

1. Target mesh size or particle-size distribution — e.g., 325 mesh, 1 000 mesh, or a custom D50/D98 value.
2. Intended application — specifying the end use helps the supplier confirm which grade is most appropriate.
3. Required quantity — the company maintains large warehouse capacity (multiple large warehouses holding tens of thousands of tons), accommodating both trial and bulk volumes.
4. Packaging and logistics requirements — bag weight, packaging type, destination port or region.
5. Quality or test requirements — whiteness targets, MgO/CaO ratios or other parameters should be shared upfront so the quality team can confirm conformance.

Have a question not covered here? Contact Lingshou County Fangzhishun Mineral Products Co., LTD. directly for product-specific technical support.