Project Type: Ceramic Fiber Energy-Saving Lining for Hot Air Furnace & Powder Calcination System
Supplier: Henrui High-Temperature Energy-Saving Materials Co., Ltd.
Industry: Powder Drying · Lithium Battery Materials · Nano Oxides
Location: Chengdu, Sichuan, China
Client: A leading drying-equipment manufacturer in Southwest China

Project Background

Traditional refractory-brick linings result in high heat loss, slow heating rates, and increased energy consumption.
To improve the performance of a newly designed hot air furnace, the client selected Hengrui’s ceramic fiber module system to upgrade the thermal insulation structure.

The key project objectives were:

• 15–25% energy savings compared with refractory brick structures
• Shorter installation time to accelerate project delivery
• Improved thermal uniformity and longer furnace service life

The system is used for drying and continuous dehydration of materials such as iron phosphate, nano zinc oxide, and other moisture-containing powders. The application requires high thermal efficiency, fast response, and stable multi-zone temperature control.

Technical Specifications

Maximum temperature: 800°C

Operating temperature range: 200–800°C

Tube diameter: φ800–2000 mm

Total furnace length: 12,000 mm

Heating method: High-temperature alloy resistance wire/band or gas heating

Temperature zones: 7 independent heating zones + 1 m transition zone

Shell temperature rise: ≤ ambient temperature + 45°C

Material standard: GB/T 3003-2017

Lining Design Solution

To ensure heat efficiency, durability, and uniform temperature distribution, a multi-layer ceramic fiber design was adopted:

1. Furnace Roof

• 25 mm ceramic fiber blanket (back lining)
• 280 mm ceramic fiber module

2. Furnace Sidewalls

• 25 mm ceramic fiber blanket
• 200 mm ceramic fiber module
• 50 mm ceramic fiber board (additional insulation & shock resistance)

3. Furnace Bottom

• 25 mm ceramic fiber blanket
• 280 mm ceramic fiber module

4. Anchoring System

• 304 stainless-steel anchors
• Bolts and nuts
• Dedicated installation wrench
• Cold-side anchor positioning for improved corrosion resistance and longer life

Advantages of Ceramic Fiber Modules

1. Lightweight Structure
   Density of only 192–220 kg/m³—about one-fourth of refractory bricks—reducing furnace weight and thermal load.
2. High Installation Efficiency
   Modular design with pre-positioned anchor points.
   Installation of 1,000 modules can be completed in 7–10 days.
3. Outstanding Energy Savings
   Low thermal conductivity delivers fast heat-up, reduced heat storage, and 15–25% overall energy reduction.
4. No Dry-Out Required
   After natural air drying of the surface hardener, the furnace can be put into operation immediately.
5. Durable in High-Temperature Environments
   Anchors positioned away from the hot face ensure excellent resistance to corrosion and thermal shock.

Project Outcomes

After adopting the new ceramic fiber lining system, the furnace achieved:

• Significant energy savings of 15–25%
• Shell temperature rise controlled below +45°C
• Improved temperature uniformity across all zones
• Faster commissioning and reduced maintenance cycles
• Higher operational stability for continuous powder drying

The system has been fully commissioned and has received positive feedback from the client.

About Hengrui High-Temperature Materials

Hengrui High-Temperature Energy-Saving Materials Co., Ltd.
A manufacturer with over 11 years of experience in ceramic fiber products and industrial furnace insulation engineering.
We provide high-efficiency, safe, and energy-saving lining solutions for a wide range of industrial furnace applications—
contributing to China’s carbon-neutral future.