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Heavy-Density Refractory Brick For Lead Furnaces - High-Temp Resistant & Corrosion-Proof
Our Heavy-Density Refractory Brick is a specialized lining material for lead furnaces, crafted from high-purity clay and alumina aggregates (Al₂O₃ 30%-42%). It features medium refractoriness (1580-1770℃), high bulk density (1.9-2.2g/cm³), and excellent volume stability (resisting lead melt penetration and thermal shock). Designed to solve pain points like short service life of ordinary bricks in lead smelting, easy corrosion from molten lead, and poor structural stability, it’s widely used in lead furnace linings, crucibles, and smelting tanks. Backed by CE certification, TüVRheinland verification, and 3000 tons monthly capacity, we offer factory-direct pricing ($271.80-$398/ton) and multi-shape customization to meet global non-ferrous metal smelting demands.
Description
1. Product Overview
This heavy-density refractory brick for lead furnaces is manufactured via precision processes: high-quality clay/alumina raw material selection (low impurity to avoid reaction with molten lead), graded crushing (to control aggregate size 0-5mm), high-pressure shaping (800-1200 tons press to enhance density), low-temperature drying (120℃ to remove moisture), and high-temperature sintering (1600-1700℃ to form stable crystal structure). Unlike ordinary refractory bricks, its high bulk density (1.9-2.2g/cm³) reduces porosity (≤26%), preventing molten lead from seeping into brick pores and causing corrosion. The product line covers 4 core grades by Al₂O₃ content (30%-42%), adapting to different temperature zones of lead furnaces (e.g., 30% Al₂O₃ for preheating zones, 42% Al₂O₃ for smelting zones), and supports straight, wedge, arch, split shapes to fit irregular furnace structures.
2. Key Features
Lead Melt Corrosion Resistance: High bulk density (1.9-2.2g/cm³) + low apparent porosity (≤26%) – prevents molten lead (327℃ melting point) from penetrating brick pores, service life 2× longer than ordinary clay bricks in lead furnaces.
Grade-Specific High-Temp Adaptability: Al₂O₃ 30%-42% covers 1250-1350℃ working temps – 30% grade for lead furnace preheating zones, 42% grade for smelting zones (1350℃), no softening or cracking.
Strong Mechanical Strength: Cold crushing strength ≥20-35MPa, flexural strength ≥3MPa – resisting impact from lead ore charging and thermal shock (1100℃ water quenching ≥10 cycles), reducing brick breakage rate.
Stable Volume & Easy Installation: Reheating linear change ≤0.5% (1350℃, 2h) – no deformation after long-term use; straight/wedge/arch shapes fit furnace linings, wedge bricks eliminate gaps between curved surfaces.
Cost-Effective & Scalable: Factory-direct pricing ($271.80-$398/ton) + bulk discounts (10% off for 1-9 tons); 3000 tons monthly capacity ensures timely delivery for large lead smelting projects.
3. Technical Parameters
| Parameter | 30% Al₂O₃ Grade | 35% Al₂O₃ Grade | 38% Al₂O₃ Grade | 42% Al₂O₃ Grade |
|---|---|---|---|---|
| Al₂O₃ Content (%) | 30-35 | 35-38 | 38-42 | 42-45 |
| Fe₂O₃ Content (%) | ≤4.0 | ≤3.5 | ≤3.0 | ≤2.5 |
| SiO₂ Content (%) | 60-65 | 58-62 | 55-58 | 50-55 |
| Refractoriness (℃) | ≥1690 | ≥1710 | ≥1730 | ≥1750 |
| Bulk Density (g/cm³) | 1.9-2.0 | 2.0-2.1 | 2.1-2.15 | 2.15-2.2 |
| Apparent Porosity (%) | ≤26 | ≤25 | ≤24 | ≤22 |
| Cold Crushing Strength (MPa) | ≥20 | ≥25 | ≥30 | ≥35 |
| Working Temperature (℃) | ≤1250 | ≤1300 | ≤1320 | ≤1350 |
| Reheating Linear Change (1350℃, 2h) (%) | 0~-0.5 | 0~-0.4 | 0~-0.3 | 0~-0.2 |
| MOQ | 1 ton (standard); 10 tons (custom shape) | Same as left | Same as left | Same as left |
4. Application Scenarios
Lead Smelting Industry:
Lead furnace linings (smelting zone, tapping zone) – resisting molten lead corrosion and high-temperature impact.
Lead refining crucibles – high density prevents lead seepage, ensuring refining purity.
Lead alloy smelting tanks – stable volume avoids tank deformation during temperature fluctuations.
Non-Ferrous Metal Smelting:
Zinc/copper smelting auxiliary furnaces – high-temp resistance (1250-1350℃) adapts to similar smelting environments.
Industrial Heating Equipment:
High-temperature stove linings, pizza oven fireboxes – yellow appearance + high strength meet decorative and functional needs.
5. Service & Support
Customization Service: Supports shape customization (straight/wedge/arch/split) with MOQ 10 tons, size adjustment (e.g., 230×114×65mm standard, 230×57×65mm split) – 5 days to provide sample drawings.
Pricing & Discounts: Tiered pricing: 1-9 tons ($358.20-$398/ton), 10-24 tons ($301.50-$335/ton), 25-49 tons ($283.50-$315/ton), ≥50 tons ($271.80-$302/ton); $80 off for $1000+ orders.
Samples & Quality Assurance: Free 10pcs samples provided (customer covers shipping); each batch undergoes 100% inspection (chemical composition, density, strength) with test reports; 1-year quality warranty (free replacement for corrosion-related damage).
Delivery & Packaging: 1-20 tons shipped within 10 days, 21-50 tons within 14 days, bulk orders (>50 tons) negotiable; standard packaging: fumigated wooden pallets (0.92×0.92m) + steel belts + plastic film (moisture-proof); shipped via Qingdao/Tianjin ports (FOB/CIF terms available).
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