Concrete Mixer Bottom Liner
Especificações Técnicas
Key Attributes
| Product Name | Concrete Mixer Bottom Liner / Floor Trough Wear Tile |
| Material Grade | Cr20 / Cr26 High-Chromium Cast Iron, Ni-Hard 4 |
| Hardness Rating | 62 – 66 HRC (Vickers Micro-Hardness 1500–1800 HV) |
| Machine Compatibility | BHS, SICOMA, Liebherr, Teka, SIMI, ELKON, MEKA, Linz |
| Mixer Types | Twin-Shaft, Single-Shaft, Planetary, Pan Mixers |
| Primary Function | Trough Floor Protection & Heavy Impact / Abrasion Shielding |
| Casting Process | Vacuum Sand Casting & Automated Isothermal Heat Treatment |
| Brand Name | VOTNE |
| Place of Origin | China |
| Liner Thickness | 18mm, 20mm, 25mm (Customized) |
| SEO Keywords | concrete mixer bottom liner, mixer floor liner, trough bottom tile, BHS floor liner, SICOMA bottom liner, concrete wear parts |
Product Overview
VOTNE Concrete Mixer Bottom Liners are heavy-duty wear-resistant tiles engineered to line the lower curved trough floor of twin-shaft, planetary, and pan concrete mixers, protecting the main mixer shell from severe aggregate impact and high-velocity sliding friction.
Located directly underneath the rotating mixing arms, bottom trough liners bear the highest normal forces and impact shock when coarse stone aggregates (40mm to 60mm) are loaded from aggregate weigh hoppers. If low-grade steel plates are used, severe gouging, micro-cracking, and rapid thinning occur at the bottom apex, leading to shell distortion and slurry leaks around discharge doors. VOTNE bottom liners utilize ultra-hard Cr20 and Cr26 high-chromium alloy metallurgy, forming a dense micro-structure of discontinuous M7C3 eutectic carbides (1500 to 1800 HV) bound inside a tempered martensitic matrix.
Designed with precision-machined countersunk bolt holes and interlocking joint radii, VOTNE bottom floor liners fit seamlessly against drum contours, maintaining strict 3.5mm arm tip clearance and delivering up to 3 times longer wear life than standard white iron plates.
Material & Alloy Grade Selection
| Alloy Grade | Chemical Composition | Hardness | Microstructure | Best Application |
|---|---|---|---|---|
| VOTNE Cr26 Super High-Cr | C: 2.8-3.6%, Cr: 24-28%, Mo/V | 63-66 HRC | M7C3 Carbides in Martensite | Extreme Heavy Aggregate (Crushed Granite, Quartzite, Basalt) |
| VOTNE Cr20 Standard High-Cr | C: 2.6-3.4%, Cr: 18-22%, Mo | 62-65 HRC | Discontinuous M7C3 Carbides | Commercial Ready-Mix & General Concrete Plants |
| Ni-Hard 4 White Iron | C: 3.0%, Ni: 5.5%, Cr: 9.0% | 58-62 HRC | Fe3C / M3C Carbide Network | Fine Mortar & Light-Duty Batching Mixers |
Technical Specifications & Dimensions
| Mixer Brand / Model | Liner Position | Standard Thickness | Bolt Hole Type | Approx. Weight (kg) |
|---|---|---|---|---|
| BHS DKXS 2.0 / 3.0 | Bottom Trough Segment | 20mm / 25mm | M16 Countersunk | 18.5 kg |
| SICOMA MAO 2250 / 3000 | Floor Trough Tile | 18mm / 20mm | M16 Countersunk | 15.8 kg |
| Liebherr DW 2.25 / 3.0 | Central Bottom Floor | 20mm / 25mm | M20 Countersunk | 21.0 kg |
| TEKA TPZ 1500 / 2250 | Planetary Floor Ring | 18mm / 20mm | M16 Countersunk | 14.2 kg |
| Custom OEM Drawings | Tailored to Spec | 15mm - 30mm | As Per CAD Drawing | Custom |
Key Advantages for Plant Operators
Severe Vertical Drop Impact Defense
High-density M7C3 eutectic carbides absorb multi-ton stone batch dumps without cracking or surface spalling.
Precision Contour Fit
CNC-machined radius curvature matches original mixer trough profiles, ensuring tight joints and zero slurry seepage.
Maintains 3.5mm Arm Tip Clearance
Minimal surface wear rate keeps mixing arm tip-to-liner clearance consistent, preserving high mixing speed and efficiency.
Extended Replacement Intervals
Extending floor liner life by up to 3x reduces maintenance teardowns and keeps your batching plant operating at peak capacity.
Standard & Custom OEM Stock
Direct replacement bottom liner tiles in stock for major European and Asian mixer brands, with rapid custom casting available.
Applications & Field Use Cases
VOTNE Concrete Mixer Bottom Liners are widely specified across industrial concrete mixing operations:
- Commercial Ready-Mix Concrete Batching Plants (Twin-Shaft Mixers 1.0m³ to 4.5m³)
- Precast Concrete Manufacturing Facilities (Planetary and Counter-Current Pan Mixers)
- Infrastructure & Dam Construction Projects (Mass concrete mixing with 40mm to 60mm aggregate)
- Asphalt & Cold-Recycled Pavement Mixing Plants
- Mining Paste Fill & Underground Backfill Preparation
- Refractory & Industrial Chemical Mixing Equipment
Frequently Asked Questions (FAQ)
1. What is the difference between a Bottom Liner and a Drum Liner?
In many plant specifications, 'Bottom Liner' and 'Drum Liner' refer to the floor wear tiles lining the lower curved section of the mixing trough. 'Bottom Liner' specifically highlights floor tiles positioned directly beneath the mixing arms and discharge zone.
2. Which alloy grade is recommended for bottom liners: Cr20 or Cr26?
For standard commercial ready-mix concrete batching, VOTNE Cr20 (62–65 HRC) provides long wear life. For plants mixing highly abrasive materials like crushed granite, quartzite, or iron slag, we recommend VOTNE Cr26 (63–66 HRC) for maximum resistance to heavy sliding abrasion.
3. What installation steps prevent slurry bleeding behind bottom floor liners?
Before fitting new bottom liners, clean the mixer trough housing to raw steel. Apply a continuous 3mm bead of high-tack RTV polyurethane sealant or install 2mm EPDM rubber backing gaskets behind each floor tile. Torque M16 Grade 10.9 countersunk bolts to 210–230 N·m.
4. Do you support custom OEM bottom liner manufacturing for older mixers?
Yes. VOTNE produces custom floor liner tiles based on customer samples or 2D/3D CAD drawings. We can customize tile dimensions, bolt hole locations, radius curvature, and alloy compositions to match any mixer model.
5. What are your lead times and trade terms for export orders?
Standard replacement floor tiles for BHS, SICOMA, and Liebherr mixers are kept in stock for immediate dispatch. Custom casting orders take 15 to 25 days. We support EXW, FOB, CIF, and DDP trade terms with global shipping.