Key Considerations for Selecting Mesh-Belt Furnaces

Key Points for Selecting Mesh Belt Furnaces

The heating elements of the mesh belt furnace adopt FEC ceramic heating plates or ceramic heating rods. The temperature control system is controlled by an imported multi-stage intelligent program temperature controller from Japan. A data communication interface can be configured as required, with stepless frequency conversion speed regulation, heat-resistant steel mesh belt transmission, and a large wrap angle tension pulley design concept, ensuring stable product transportation. So, what key points should be considered when selecting a mesh belt furnace?

1. Reliability

• Furnace Type Selection: The design starts with type selection, and the correct selection of a muffle or muffle-free furnace type should be made first.
• Heat-Resistant Steel Material Selection: High-quality Fe-Cr-Ni, Fe-Ni-Cr, and Ni-based alloy materials are used, and reasonable material selection is conducted according to the furnace's operating temperature range, heat treatment process, etc. This extends the actual service life and optimizes the cost-performance ratio.
• Instrument and Electrical Component Selection: High-reliability PLC programmable logic controllers, SRC heating modules, adaptive digital display temperature controllers, and carbon potential controllers are commonly used, enabling stable operation throughout the entire equipment life cycle.
• Sensing Element Selection: The service life of the oxygen probe for atmosphere control is 1 year, with a carbon potential control accuracy of ±0.05%; the service life of the thermocouple is more than 5 years, with a control accuracy of ±0.05%.
• Refractory Material Selection: 0.48 ultra-lightweight carburization-resistant bricks, ultra-lightweight insulation boards, and refractory cotton are adopted, with a service life of 5 years.
• Devices for Preventing Common Defects: Cushion pads to prevent parts from being scratched or damaged; baffles to prevent parts from bouncing out and scattering; torque limiters to prevent parts from bouncing out and jamming the transmission mechanism; spray cleaning devices to prevent parts from sticking; grooved lifting devices to prevent parts from sticking; mountain-shaped and roller-type drying devices to prevent cleaning fluid from being difficult to drain from pits on parts. The tempering furnace is enlarged and lengthened to ensure high hardness uniformity, etc.

2. Maintainability

• Automatic display of fault points; automatic shutdown of the previous process of the fault point after a fault occurs; automatic sound and light alarm; and provision of special maintenance tools, etc.

3. Supportability

• Thoughtful after-sales service ensures customers have no worries after purchase. The seller sets up a spare parts warehouse for the buyer's users. The seller establishes a forecasting system for spare parts required by the buyer's users. With the development of emerging network technologies, remote control has become a reality. The cooperation between suppliers and users will be more tacit, and the application of new processes and technologies will further reduce costs.

4. Energy Conservation

• According to the requirements of the "Tenth Five-Year Plan" for heat treatment, the average electricity consumption of professional heat treatment plants in major industrial cities should be reduced to below 500 KWh/t. The energy utilization rate of mesh belt furnaces will be increased to 360-420 KWh/t. Heat exchanger technology, waste heat utilization technology, airtight furnace shell welding technology, and energy-saving technology for reducing the surface area of the furnace body are generally adopted. The furnace wall temperature rise is controlled at 6℃ by using furnace building technologies such as 0.48 ultra-lightweight carburization-resistant bricks, ultra-lightweight insulation bricks, ultra-lightweight insulation boards, and refractory cotton.