Graphite Chute Liner and Wear Plate for Aluminum Casting
Product Overview
Our graphite chute liners and wear plates are consumable refractory components installed in aluminum casting launders, troughs, and transfer chutes to contain and direct molten aluminum from furnace to mold. Graphite liners provide a non-wetting, erosion-resistant surface that keeps molten metal flowing cleanly without buildup, dross adhesion, or iron pickup. We manufacture custom-shaped graphite launder liners, trough sections, and trough covers for die casting, ingot casting, and aluminum extrusion operations, machined to fit existing steel trough housings.
Molten aluminum is highly corrosive to steel and iron, causing erosion, iron contamination, and costly trough maintenance. Graphite chute liners solve these problems: they resist aluminum wetting, do not contaminate the melt, and can be replaced quickly when worn. At Jincheng Graphite, we machine graphite launder liners to customer trough dimensions, with curved sections, joints, and end dams as required. Each liner is precision-shaped for a snug fit in the steel trough shell, minimizing metal penetration and extending liner life.
Key Features
- Non-wetting surface - molten aluminum does not stick or build up on graphite
- Erosion resistant - withstands flowing molten aluminum at 700-750°C
- No iron contamination - graphite does not introduce iron into aluminum melts
- Custom shapes - curved troughs, straight sections, end dams, and covers
- Quick replacement - worn liners swap out without rebuilding the trough
- Thermal shock resistant - handles repeated hot and cold cycling
- Tight fit to trough shell - machined to minimize metal seepage behind liner
- Cost effective - lower total cost vs. cast iron or steel trough maintenance
Technical Specifications
| Parameter | Value |
|---|---|
| Material | Extruded / isostatic graphite |
| Bulk Density | 1.70 - 1.80 g/cm³ |
| Melt Temperature | 700 - 800°C (aluminum and alloys) |
| Wall Thickness | 8 - 20 mm |
| Bottom Thickness | 10 - 25 mm |
| Section Length | 300 - 1500 mm per section |
| Trough Width Range | 50 - 300 mm (custom) |
| Dimensional Tolerance | ±0.5 mm |
| Surface Finish | Ra 3.2 µm (machined) |
| Service Life | 30 - 90 days (application-dependent) |
| Optional Covers | Flat graphite trough covers to reduce heat loss and dross |
| Lead Time | 10-15 business days |
Applications
- Die casting furnaces - launder liners from holding furnace to die casting machine
- Ingot casting - trough liners for direct chill and ingot casting lines
- Aluminum extrusion - transfer troughs from melting furnace to extrusion press
- Aluminum wheel casting - tundish and trough liners for low-pressure casting
- Recycling furnaces - launders for recycled aluminum melting and casting
- Laboratory casting - small custom troughs for research and pilot casting
Why Choose Jincheng Graphite?
- Custom trough design - liners machined to your exact trough dimensions
- Material selection - recommend graphite grade based on flow rate and temperature
- Tight fit - precision machining minimizes metal seepage behind liners
- Sectioned design - long troughs split into replaceable sections for maintenance
- Fast delivery - standard liners ship within 10-15 business days
- Cost savings - graphite liners reduce iron contamination and trough downtime
- Volume supply - reliable monthly liner supply for foundry maintenance
- Technical support - we help optimize liner geometry and thickness
FAQ
Q: How long does a graphite chute liner last?
A: Under typical aluminum casting at 720-750°C with moderate flow, graphite liners last 30-90 days. Life depends on flow rate, melt temperature, alloy type, and how often the trough is emptied. High-flow, high-temperature operations see shorter liner life.
Q: How do I install the liner in my existing steel trough?
A: We machine the outer dimensions of the graphite liner to match the inner dimensions of your steel trough with a small clearance. Simply drop the liner in place. If your trough is irregular or worn, we can provide a shim set to ensure a snug fit.
Q: Can you make curved or angled trough sections?
A: Yes. We machine curved, angled, and branched trough sections from solid graphite blocks. Send us a drawing or describe your trough layout, and we will fabricate matching liner sections.
Q: Should I use covers on the trough?
A: Graphite trough covers reduce heat loss, minimize dross formation, and protect the metal stream from ambient air. They are recommended for long troughs or cold-weather casting operations. We supply matching flat covers with handle cutouts.
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