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Rectangular slab crystallizers are deployed in slab casters for wide steel slabs used in shipbuilding, pipelines, and heavy plates. Funnel shapes suit thin slabs (40-90 mm) in CSP/ISP processes, while parallel designs handle thicker sections. They enable stable casting at speeds up to 5 m/min, reducing breakouts in integrated steel plants.
Rectangular slab crystallizer copper plates measure 900-2200 mm wide, 25-50 mm thick, and 800-1200 mm long, using Cu-Cr-Zr or Cu-Ag alloys with >350 W/mK conductivity. Designs include parabolic tapers (1.0-1.5%), chamfered corners for crack control, chrome plating, and water slots for uniform cooling. Narrow faces taper 1.1-1.25% to match shrinkage.
Rectangular slab crystallizers ensure even heat dissipation, minimizing air gaps, cracks, and bulging for campaigns >10 hours and higher throughput. Chamfered narrow plates eliminate corner longitudinal cracks, improving rolled plate quality. Suited for medium/thin slab casters in construction and energy sectors.
| Attribute | Parameter | Description |
|---|---|---|
| Product Name | Rectangular Slab Crystallizer | Copper mould tube or plate used in continuous casting machines to form rectangular steel slabs. |
| Application | Continuous casting of slabs | Solidifies molten steel into slabs with precisely controlled thickness and shape. |
| Copper Alloy Grade | Cu-Ag (0.07–0.1% Ag), Cu-DHP, Cu-Cr-Zr | Silver addition improves recrystallization temperature and wear resistance of the copper alloy. |
| Dimensions (Thickness) | 27–60 mm | Thickness range based on slab thickness and casting requirements. |
| Dimensions (Length) | 1100–1200 mm | Length optimized for funnel or parallel plate crystallizer designs. |
| Dimensions (Width) | 1220–1700 mm | Matches slab widths in medium to thin slab continuous casting. |
| Shape Variants | Funnel-shaped, parallel plate, H² shape | Designs tailored for cooling efficiency, hydraulic flow, and slab quality. |
| Cooling Design | Water channels integrated parallel to working surface | Ensures uniform heat removal across crystallizer copper plates. |
| Surface Coating | Chromium plating (single layer) | Enhances wear resistance but subject to peeling with use. |
| Thermal Conductivity | High (~390 W/m·K) | Critical for rapid solidification and heat extraction in CCM operations. |
| Service Life | 200–500 heats (extendable by grinding) | Longevity dependent on alloy quality and operational parameters. |
| Key Features | Funnel bulge accommodates nozzle immersion | Funnel shape enhances molten steel flow and slab surface quality. |
| Industry Use | Steel slab continuous casting | Applied in processes like CSP, ISP, FTSR for hot rolled flat product manufacture. |
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