Corundum Plastic Refractory – High-Temp Wear-Resistant Ramming Mass for Furnace Lining

Corundum Plastic Refractory – High-Temp Wear-Resistant Ramming Mass for Furnace Lining

1. What Is Corundum Plastic Refractory?

2. Core Raw Material Advantages of Corundum Base

1. Ultra high refractoriness: The melting point of corundum reaches above 2050℃, suitable for long-term service under 1600℃–1800℃ high-temperature working conditions;
2. Outstanding abrasion resistance: Dense corundum aggregate structure resists scouring of high-temperature flue gas, molten slag and solid materials;
3. Good chemical stability: Weak reaction with acid and neutral slags, anti-oxidation and anti-corrosion inside high-temperature kilns;
4. Low thermal shrinkage: Small linear shrinkage after baking, less cracking and peeling of furnace lining during long-period operation.

3. Key Product Performance Characteristics

• Permanent room-temperature plasticity: Easy to cut, patch, tamp and mold on construction sites, perfect for irregular lining parts and local patch repairs;
• No extra water mixing needed: Delivered with matched plastic binder, avoiding performance damage caused by improper water addition;
• Fast construction & quick startup: No long-time curing required after ramming. Only low-temperature preheating is needed before furnace operation, greatly shortening construction downtime;
• Strong bonding performance: Firmly adheres to old refractory linings, steel anchor bricks and metal anchor pieces, effectively preventing lining shedding;
• Excellent thermal shock resistance: Resists frequent temperature rise and drop without large-area spalling.

4. Main Application Scenarios

• Industrial heating furnaces, roller kilns, shuttle kilns, high-temperature tunnel kilns;
• Steel industry: Heating furnace hearth, furnace arch, slag line area, runner lining local repair;
• Thermal power plants: Boiler furnace lining, flue high-temperature section, ash erosion area;
• Non-ferrous metal smelting furnaces, ceramic firing kilns, petrochemical high-temperature reactors;
• Emergency patch repair of irregular curved surfaces, anchor brick gaps, worn and collapsed lining areas.

5. Construction Instructions

1. Surface treatment: Clean up dust, loose residues and residual slag on the original furnace lining surface to ensure tight bonding;
2. Direct forming: Take corundum plastic refractory blocks, tamp layer by layer with ramming tools, compact the material to eliminate internal gaps;
3. Surface finishing: Smooth the surface with trowels after ramming to form an integrated seamless lining;
4. Baking guidance: Adopt staged heating curve for baking to discharge internal moisture evenly and prevent lining burst from rapid temperature rising.

6. Comparison With Similar Unshaped Refractories

1. VS Corundum castable: Castables need water mixing, vibration and long curing. Corundum plastic refractory supports instant ramming and quick furnace restart, ideal for urgent maintenance;
2. VS Air-setting mortar: Mortar is for thin-layer gap filling. Corundum plastic refractory can build thick integrated lining with better wear resistance and longer service life;
3. VS Ordinary clay plastic refractory: Corundum type owns much higher refractoriness and slag resistance, fit for ultra-high temperature working environments where clay plastic cannot meet demands.

7. Storage & Shelf Life Tips