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Insulating Aggregate - Dirgodaz Amol Refractories Company
Insulating Aggregate

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Technical Specifications

Insulating Aggregate

General Description

Insulating aggregates are lightweight refractory products with low thermal conductivity. Dirgodaz Amol Industries produces various types of insulating aggregates (SD-IA series) based on aluminosilicate compositions or with low iron oxide content.

The technical features of these products include:

  • Higher thermal stability compared to other lightweight materials such as perlite, vermiculite, and certain ceramic fibers
  • Low thermal conductivity
  • Adequate strength
  • High purity and low iron oxide content
  • Suitable resistance in corrosive and reducing chemical environments (carbon monoxide, etc.)
  • Safe to use

Technical Specifications Table

Property Unit Product Grade
SD-IA 401 SD-IA 402 SD-IA 601 SD-IA 602
Service Temperature °C 1400 1400 1550 1550
Bulk Density (Coarse/Fine Particles) g/cm³ 0.55-0.70 0.90-1.10 0.65-0.80 0.90-1.10
Permanent Linear Change % ≤1 ≤1 ≤1.5 ≤1.5
Condition 1350°C for 24 hours 1350°C for 24 hours 1500°C for 24 hours 1500°C for 24 hours
Al₂O₃ % ≥40 ≥40 ≥60 ≥60
SiO₂ % ≤55 ≤55 ≤36 ≤36
Fe₂O₃ % ≤1 ≤1 ≤1 ≤1

Available Particle Sizes (mm)

  • 1-3
  • 3-5
  • 5-8

Applications

  • As raw material in monolithic refractories such as insulating castables
  • As filler in lightweight blocks and industrial furnace components
  • As covering material in casting of ferrous and non-ferrous metals

Additional Technical Specifications

These products are available in different technical specifications in terms of alumina content and density, and in particle sizes of 1-3 mm, 3-5 mm, and 5-8 mm. Additionally, new products can be manufactured according to specific technical requests and design needs of customers for various industrial applications.

The data below represent average values of quality properties for the product types, which also have typical variation ranges.

Chemical Properties

  • High-purity aluminosilicate compositions
  • Low iron oxide content (Fe₂O₃ ≤1%)
  • Resistance to corrosive and reducing chemical environments