Plunger-Type Ladle Baking Device
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Sealed Plunger Locking Structure for Extreme Energy Saving
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Uniform Full-range Temperature Field to Extend Refractory Service Life
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Shortened Baking Cycle for Higher Ladle Turnover
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Full Automatic Intelligent Control with Multi-layer Safety Interlock
- Modular Split Assembly for New & Existing Steel Plant Retrofit
1. Product Overview
Plunger Type Ladle Baker is dedicated intelligent ladle preheating equipment matched for long & short-process steel plants. It adopts innovative hydraulic plunger sinking sealing structure with full-oxygen / oxygen-enriched multi-fuel combustion system, applicable for drying new ladle refractory lining, preheating circulating cold ladles and heating overhauled ladles.
The hydraulic plunger lifting unit drives burners to sink fully into ladle cavity, and plunger cover tightly seals ladle mouth to trap high-temperature flue gas inside, thoroughly eliminating major defects of traditional top-mounted bakers including massive heat loss, huge temperature difference and excessive gas consumption.
It supports multiple fuels such as natural gas, blast furnace gas and converter gas, equipped with PLC segmented intelligent temperature control system for both online & offline baking modes. It can be matched with full series multi-frequency screens and scrap steel continuous preheating system, forming an integrated low-carbon steelmaking solution: mine raw material screening – scrap preheating – constant-temperature ladle baking.
2. Detailed Description
After accurate positioning of the ladle, the hydraulic plunger unit descends vertically to sink burners into the ladle, and the plunger cover compresses the ladle mouth to form a sealed high-temperature chamber and block flue gas leakage.
Fuel and high-purity oxygen are fully mixed and combusted in integrated anti-backfire burners. High-temperature flame reaches ladle bottom directly, and hot gas circulates along refractory lining from top to bottom without cold heating dead zones.
The PLC intelligent system stores 3 standard baking curves: low-temperature stage for slow moisture removal, medium-temperature stage for uniform gradient heating, high-temperature stage for constant holding. It automatically adjusts fuel-oxygen ratio to stabilize internal temperature at 800–1100℃.
After baking finished, the plunger unit lifts up completely, and preheated ladles can be directly transported to smelting stations. All flue gas is collected and purified to reduce thermal NOx generation fundamentally for compliant emission.
3. Why Choose Us
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Plunger sealed sinking structure, zero heat loss, 50%-60% comprehensive energy saving:The lifting plunger cover fully seals ladle mouth, burner sinks into ladle to avoid heat radiation loss; eliminate heat absorption by nitrogen, cut gas consumption by over half, save millions of gas cost for 3Mt steel plant annually.
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Full oxygen high-temperature rapid heating, 40% shorter baking time, improve ladle turnover efficiency:Oxygen-fuel flame over 2600℃, small ladle reaches 1100℃ within 10-15min, 200t ladle baking cycle cut to 2-3 hours. Synchronous scrap preheating shortens converter waiting time and increases overall production capacity by 10%-15%
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Dual-mode for ladle baking & scrap preheating, greatly increase scrap ratio and reduce hot metal consumption:Dual-function for empty ladle refractory baking and full ladle scrap preheating. Preheat scrap to 400~850℃ to evaporate moisture, oil and coating, eliminate splashing risk, reduce hot metal consumption by 70~100kg per ton steel and increase scrap ratio over 10%.
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Segment intelligent temperature control curve, prevent refractory cracking and extend ladle service life:Three-stage heating curve of low-temperature drying, medium-temperature curing and high-temperature sintering avoids refractory cracking caused by rapid heating. Precise temperature control ±5℃ ensures uniform heating, extends refractory service life by over 20%.
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Fully enclosed low-emission structure, low flue gas and dust, adapt to ultra-low emission plant:Fully enclosed structure eliminates open dust emission and cold air infiltration, flue gas volume reduced by over 55%. Organics are fully decomposed during scrap preheating with low dust and odor, fully compliant with steel plant ultra-low emission standards.
4. Specifications & Technical Data
| English Parameter | Tech Parameters |
| Model | ZSKBQ-Plunger Plunger Sealed Sinking Ladle Heater |
| Combustion Mode | 3 switchable modes: full oxygen combustion, oxygen-enriched combustion, gas direct combustion |
| Max Flame Temp | 2600~2800℃ |
| Max Ladle Temp | 1100℃ |
| Fuel Options | Converter gas, blast furnace gas, coke oven gas, natural gas |
| Gas Working Pressure | 0.008~0.025MPa |
| Oxygen Working Pressure | 0.3~0.6MPa |
| Temperature Control | PLC touch screen automatic segmented heating curve, PID closed-loop regulation |
| Temp Accuracy | ±5℃ |
| Plunger Drive | Hydraulic lifting plunger sealing assembly |
| Plunger Stroke | 800~1200mm (customized according to ladle height) |
| Sealing Form | High-temperature resistant fiber flexible compression sealing, zero flue gas leakage |
| Burner Material | 310S high temperature resistant stainless steel + silicon carbide lining |
| Operating Noise | ≤70dB |
| Power Supply | for control circuit |
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