Brictec Drying Car Technical Standards for Fired Brick Production Lines

Brictec Point of View:

• "Uniform drying is superior to rapid drying" for drying cars.
• "Galvanized anti-corrosion standards are a key quality indicator" for drying cars.
• "Stability of the automation system" for drying cars is one of the critical factors determining the efficiency and quality of high-end automated brick plants.

In modern clay sintered brick production lines, the drying car (also referred to as dryer car) serves as an important conveying and supporting equipment linking the forming and firing processes. Its structural design and manufacturing quality directly affect the drying uniformity of green bricks, production efficiency, and equipment service life.

Common types of drying cars currently used in the industry primarily include:

1. Steel structure drying car
2. Cast iron drying car

As brick plants move towards high automation, long service life, and low maintenance, the manufacturing process for drying cars has gradually developed into a systematic quality control standard. Brictec, drawing on international advanced experience, proposes the following technical requirements for the design and manufacturing of drying cars.

Drying cars are subjected to the following during operation:

• Load from multi-layer green bricks
• Thermal stress effects (temperature cycling)
• Long-term operational fatigue

Therefore, the structural design must meet the following requirements:

• Utilize high-strength steel sections or composite structural frames
• Perform finite element analysis (FEA) for strength verification on key load-bearing areas
• Prevent structural deformation or sagging over prolonged use

Steel Structure Drying Car (Traditional)

• Features: High strength, mature manufacturing process
• Application: Multi-layer stacking, hollow brick production lines

Cast Iron Drying Car

• Features:
  • Excellent corrosion resistance
  • Strong resistance to thermal deformation
  • Good thermal stability
• Advantages:
  • Better suited for high-temperature flue gas drying systems
  • Long service life
• Application:
  • Utilizing kiln waste heat for drying
  • High-end automated brick plants

Drying car design must balance:

• Uniform heating of upper and lower brick layers
• Stability of drying rate

Key control points:

• Matching thermal conductivity of the car deck material
• Avoiding localized overheating or cold spots
• Ensuring uniform hot air flow through the brick layers

When producing hollow bricks or low-strength green bricks: intermediate partition plates must be installed, typically dividing into 2–3 layers.

Design requirements:

• Sufficient strength of partition plates
• Ensuring ventilation gaps
• Avoiding localized pressure deformation

For brick plant equipment, drying cars typically employ: Hot-dip Galvanizing

Recommended technical standards:

• Galvanized coating thickness: ≥ 80–120 μm
• For highly corrosive environments (high humidity + high temperature): Recommended ≥ 120 μm

Process requirements: Surface sandblasting (Sa2.5 standard), uniform coating without missed spots, no blistering, peeling, or cracks

For high-temperature drying systems: key components require heat-resistant coatings to prevent oxidation and thermal fatigue.

Optional processes: Silicone heat-resistant coating, high-temperature anti-corrosion paint.

Industry standards: Wheel track: 610 mm; Rail gauge: 600 mm; Rail specification: 8 kg/m

Design requirements: Reasonable wheel-rail clearance, ensuring stable operation without deviation

Quality control focus:

• Adoption of high-temperature resistant bearing structures
• Dust-proof bearing seal design

Wheel materials must possess:

• Wear resistance
• Thermal fatigue resistance
• Impact resistance

Key structural welds use CO₂ gas shielded arc welding.

Welds undergo: Non-destructive testing (UT / MT) to prevent cracks and porosity.

Key control points: Car deck flatness, consistency of wheel gauge, diagonal tolerance of the frame, ensuring that drying cars do not deviate or wobble during long-distance operation.

Prior to delivery, Brictec drying cars must undergo:

• Static load testing
• Dynamic operational testing
• Anti-corrosion coating inspection

Combining international standards with engineering practice, Brictec drying cars offer the following advantages:

(1) Structural Advantages

• High-strength modular design
• Strong resistance to deformation
• Adaptable to various brick types

(2) Thermal Advantages

• Uniform drying
• Reduced cracking and deformation
• Improved product yield

(3) Durability Advantages

• High-standard galvanized anti-corrosion
• Suitable for high-temperature and high-humidity environments
• Long service life

(4) Operational Advantages

• Smooth operation
• Low maintenance costs
• Suitable for automated production lines

As a critical piece of equipment in sintered brick production lines, the design and manufacturing quality of drying cars directly affect:

• Drying quality of green bricks
• Production efficiency
• Equipment operational stability

By introducing advanced manufacturing concepts, Brictec systematically optimizes structural design, thermal performance matching, anti-corrosion processes, and manufacturing standards, resulting in a high-performance drying car system tailored for modern brick plants.

This system effectively meets the comprehensive demands of high-end brick plants for:

• High efficiency
• Low energy consumption
• Long service life
• Automated operation