Magnesium Hydroxide Storage — Mg(OH)2 Slurry Tank Selection

Storing Magnesium Hydroxide? Start Here

Magnesium hydroxide is commonly used in its slurry form for applications like wastewater pH control and flue-gas desulfurization. This white powder is typically mixed into a slurry with a specific gravity of 1.55 to 1.60, ensuring it stays suspended with moderate agitation. It's a popular choice because it’s gentle on materials and doesn't pose severe risks like some other chemicals. If you're considering using magnesium hydroxide, it's important to know how to store it properly to ensure safety and longevity.

Can you store it in a poly tank?

Yes, you can store magnesium hydroxide slurry in a polyethylene tank. Both HDPE and XLPE are suitable materials for this purpose. These tanks are resistant to the mild alkalinity of the slurry, though you should be mindful of potential abrasion over time, especially in pump and pipe systems.

Managing Slurry Settling and Abrasion

The key issue with magnesium hydroxide slurry is managing the settling of particles and the abrasion they can cause. If agitation stops, particles can settle and form deposits, which may lead to increased wear on pumps and pipes. Regular maintenance and ensuring continuous agitation are essential to prevent these issues.

The safety that actually matters

• Ensure continuous agitation to prevent settling and abrasion.
• Use abrasion-resistant materials in pumps and pipes.
• Consider heat tracing in cold environments to maintain slurry viscosity.

Common questions

Can magnesium hydroxide slurry freeze?

Yes, the slurry can become more viscous below 25°F, so heat tracing is recommended in cold climates.

What type of gaskets should I use?

EPDM gaskets are standard for slurry service, but consult the manufacturer's chart for specific recommendations.

Is magnesium hydroxide safe to handle?

Yes, it has a safer profile compared to more caustic alternatives, with no severe chemical burns risk.