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Nozzles and Stoppers - Dirgodaz Amol Refractories Company
Refractories for Metal Casting Industry

Full Product Catalog

To access complete technical specifications, standard tables, and detailed product information, download our catalog.

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General Description

Dirgodaz Amol Refractories Company produces various shaped refractories used in the metal casting industry.

Production Process

The above products are manufactured using different raw materials or forming processes such as isostatic pressing and slip casting, followed by high-temperature sintering. This production process results in high-quality parts with uniform microstructure and outstanding technical properties.

Key Advantages

  • Increased service life and reliable performance
  • Ability to cast more pieces before replacement
  • Maximum geometric compatibility with other components
  • Optimal molten metal flow control with high dimensional accuracy
  • Resistance to thermal shock and chemical corrosion

Technical Features

Physical and Mechanical Properties

  • High thermal stability
  • Suitable thermomechanical properties
  • Good thermal shock resistance
  • Low wettability
  • High resistance to abrasive corrosion

Product Types

Carbon-Containing Refractories for Casting Industry

  • Graphite Stopper Rod
  • Graphite Nozzle
  • Graphite Stopper Head

Alumina-Silica Refractories for Casting Industry

  • Nozzle
  • Well Block
  • Stopper Head

Graphite Nozzle

Graphite nozzles are used as part of the molten metal flow control system in metal casting and play a critical role in precisely directing the melt into the mold.

Key Features

  • High resistance to corrosion by molten metals
  • Excellent thermal stability
  • Smooth surface for uniform melt flow
  • Long service life and wear resistance

Alumina-Silica Nozzle

Alumina-silica nozzles are designed for specific applications in metal casting and are used in conditions where carbon-based refractories are not suitable.

Technical Specifications of Alumina-Silica Nozzle
Chemical Composition Al₂O₃: 50-70%, SiO₂: 20-40%, Others: ≤5%
Density (g/cm³) 2.8-3.2
Compressive Strength (kg/cm²) ≥800
Thermal Shock Resistance Excellent
Maximum Operating Temperature 1600°C

Well Block

Well blocks are used as part of the melt distribution system in casting and play an important role in uniformly distributing the melt among multiple molds.

Distinctive Features

  • High thermal resistance to temperature shocks
  • Resistance to corrosion by molten metals
  • Uniform structure without cracks
  • Precise dimensions for optimal installation and performance