How to Choose High-Purity Industrial Magnesium Oxide: Key Indicator Insights

Industrial magnesium oxide (MgO) is a widely used material in sectors such as metallurgy, ceramics, environmental protection, rubber, and chemical manufacturing. However, not all magnesium oxide products are created equal. Selecting high-purity industrial MgO is critical for ensuring performance, safety, and process efficiency.

In this article, we break down the key indicators that help you make an informed purchasing decision.

✅ 1. Purity Level (MgO Content)

The most critical indicator is the MgO content.

• High-purity MgO generally has a content above 96%, with >99% used in high-end applications such as electronic ceramics and specialty glass.

• Lower MgO percentages may contain impurities like CaO, Fe₂O₃, or SiO₂ that affect performance.

✅ 2. Impurity Profile

Check for low levels of:

• Calcium Oxide (CaO)

• Iron Oxide (Fe₂O₃)

• Silicon Dioxide (SiO₂)
  These can interfere with reactivity and final product quality. Especially in high-temperature or precision industries, impurity control is essential.

✅ 3. Particle Size and Surface Area

Different applications require different particle sizes:

• Fine powder (D50 < 5μm) is ideal for rubber fillers, adhesives, and chemical reactions.

• Granular MgO works better in steelmaking or refractory applications.

• A higher surface area increases reactivity, making the MgO more effective in chemical and environmental uses.

✅ 4. Reactivity and Loss on Ignition (LOI)

• Reactivity is a measure of how fast the MgO reacts in a given system—important for wastewater treatment and flue gas desulfurization.

• LOI (typically < 1.5% for high-quality MgO) reflects the presence of bound moisture or CO₂. A low LOI means better thermal stability.

✅ 5. Production Process

There are two main production methods:

• Dead-burned (DBM): for refractory use, low reactivity.

• Light-burned or Calcined MgO: high surface area and reactivity.

• Brine-derived MgO (like ours) offers higher purity, better flowability, and lower heavy metal content, ideal for advanced applications.

✅ 6. Customization & Packaging

Choose suppliers who offer:

• Custom particle size, purity level, and moisture control

• Flexible packaging: 25kg bags, jumbo bags, moisture-proof options

• Third-party COA, MSDS, and technical support

  
  

  

Why Choose Us?

At Shandong Runfu Ca Mg Chemical Technology Co., Ltd., we specialize in high-purity industrial magnesium oxide produced via a brine-based process. Our MgO features:
✔️ Purity >99.5%
✔️ Low heavy metal content
✔️ Customizable granularity
✔️ Excellent reactivity and stability
✔️ Packaging tailored to your needs

Get in Touch Today!
We’re ready to help you choose the right grade of magnesium oxide for your industrial application.
Email: sales@runfucamg.com
Website: runfucamg.com
WhatsApp: +86 18365673536