Metallurgical Powder Mixer, Doebritz Heavy-Duty Industrial Blender, Capacity 50L-5000L / ATEX Certified

Product Summary

The Doebritz Metallurgical Powder Mixer is a heavy-duty industrial blender engineered specifically for homogeneous mixing of fine metal powders, abrasive granules, and flake materials. With capacities ranging from 50L to 5,000L and ATEX-certified explosion-proof construction, this mixer delivers axial and radial material movement for batch uniformity of >98%. Ideal for ferroalloys, aluminum dust, copper concentrates, and flux powders in pneumatic conveying and hopper discharge systems.

Why Source Doebritz Metallurgical Powder Mixer

• Ultra-Low Air Leakage: Precision CNC-machined housing and rotor clearances down to 0.1mm, achieving leakage rates <0.01% for hazardous metal dusts.
• ATEX Certified Safety: Full explosion-proof design (Ex II 2D c T6) for Zone 21 & 22 dust atmospheres, with grounding shafts and anti-sparking rotor tips.
• 20-Year Wear Life: Hardened cast iron body (GGG 40) or 304/316L stainless steel with optional ceramic coating for abrasive metallurgical powders.
• Global OEM Supply: End-to-end production from Doebritz’s ISO 9001:2025 foundry and CNC shop, supporting custom flanges, drives, and inlet/outlet configurations.
• 25-Day Lead Time: Stock rotor assemblies and rapid customization for non-standard sizes, backed by 24/7 technical support.

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Housing & Rotor Engineering

The Doebritz Metallurgical Powder Mixer features a split cast housing (ASTM A536 65-45-12 ductile iron) with removable wear liners. The proprietary rotor design combines 6 to 12 mixing paddles and helical ribbons, CNC-balanced to eliminate vibration at speeds up to 75 RPM. Outboard-mounted bearings with labyrinth seals prevent powder ingress, while the cartridge-style stuffing box accepts nitrogen purge to seal toxic metal fines. All contact surfaces achieve Ra 0.8μm finish to reduce material adhesion and cross-contamination risk.

Technical Specifications

Standard Doebritz models meet demanding metallurgical duty cycles. For custom pressure ratings or high-temperature configurations (up to 400°C), consult our engineering team.

Specification	Detail
Body Material	Ductile Cast Iron GGG 40 / SS304 / SS316L
Rotor Design	6 to 12 Paddles + Helical Ribbon (CNC-balanced)
Capacity Range	50L, 200L, 500L, 2000L, 5000L
Max Operating Pressure	3.5 bar (51 psi)
Max Temperature (Std)	-20°C to +150°C
ATEX Classification	Ex II 2D c T6 (Zone 21/22)
Clearance (Rotor to Housing)	0.1mm – 0.3mm
Drive Power	1.5 kW to 75 kW
Mix Homogeneity	>98% coefficient of variation

Heavy-Duty Application Scenarios

Pneumatic Conveying Systems

Integrates directly as an airlock mixer for dilute- or dense-phase pneumatic transfer of metal powders. Maintains pressure differential up to 3.5 bar while continuously blending in-line.

Silo Discharging & Blending

Mounted beneath metallurgical silos to homogenize material layers during discharge. Eliminates segregation of particle sizes (10μm to 5mm) before bagging or smelting.

Dust Collector Discharge Homogenization

Collects and mixes fine dusts from baghouse filters, producing a consistent secondary product stream for recycling or disposal, with <5% residual oxygen enclosure.

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Frequently Asked Questions

What is the minimum order quantity for a Doebritz Metallurgical Powder Mixer?

1 unit for standard sizes (50L-5000L). Custom-engineered mixers require a minimum of 2 units, but single prototypes are available for qualified OEM partners.

Can you customize the inlet/outlet flange to my existing system?

Yes. Doebritz offers full flange customization to DIN, ANSI, JIS, or custom bolt patterns. Provide your drawing or existing equipment model, and we will match exactly.

Is this mixer certified for ATEX Zone 21 metal dust?

Absolutely. Our standard metallurgical mixer is ATEX Ex II 2D c T6 certified for conductive dusts (aluminum, magnesium, titanium). Optional inert gas purge and temperature monitoring are available for Zone 20.

What is the maximum operating temperature?

Standard design: -20°C to +150°C. High-temperature version with graphite seals and 316L housing: up to 450°C for pre-heated metal powders or direct smelter feed.

How long is the warranty and typical lead time?

24-month warranty against manufacturing defects. Lead time: 20 days for standard cast iron models, 35 days for stainless steel or ATEX-certified units. Rush assembly available.