Working principle of customized laboratory rotary furnace

Working principle of customized laboratory rotary furnace

1. Basic structure:
Furnace body: usually made of high-temperature resistant materials (such as ceramic fibers, refractory bricks, or carbon steel lined refractory materials), cylindrical in shape, installed horizontally or slightly inclined, with a common inclination of 3% -6%.
Heating system: provides thermal energy, resistance wire or heating rod.
Transmission system: It drives the rotation of the furnace body, usually consisting of a motor, a reducer, and a transmission chain or gear, to make the furnace body rotate at a constant speed of 0.2-10 revolutions per minute.
Control system: Accurately control temperature and rotation speed, including temperature sensors (such as thermocouples), controllers, and actuators (such as solid-state relays), and achieve temperature stability through PID regulation.
Feeding and discharging system: convenient for material entry and exit, materials are added from the higher end and discharged from the lower end.
Furnace tube: Optional materials include heat-resistant alloys, quartz, or corundum, selected according to material characteristics.

2. Working process:
Material entry: The materials to be processed are fed into the rotary furnace through the feeding system.
Rotary motion: The furnace body slowly rotates under the drive of the transmission system, causing the materials to continuously roll and mix inside the furnace. Due to the inclination of the furnace body, the material gradually moves from the high end to the low end during the movement process.

3. Heating process:
Heat transfer: The heating system transfers heat to the material through radiation, convection, and conduction.
Temperature control: The control system precisely controls the temperature inside the furnace by adjusting the heating power and transmission system speed according to the preset temperature curve.
Chemical reaction: Materials undergo physical and chemical reactions at high temperatures, such as decomposition, reduction, oxidation, sintering, etc.
Product discharge: The reacted product is discharged from the furnace through the discharge system, completing the entire processing process.

4. Key features:
Uniform heating: The rotation of the furnace body causes the material to constantly flip, ensuring uniform heating and avoiding local overheating or underheating.
Adapt to multiple processes: can meet different temperature curve requirements, suitable for various materials and process needs.
Continuous production: It can achieve continuous feeding and discharging, improving production efficiency.
Flexible operation: The rotation speed and temperature can be adjusted according to experimental requirements.

5. Application areas:
Materials Science: Used for the synthesis, sintering, and heat treatment of materials.
Chemical industry: calcination of catalysts, drying and pyrolysis of solid materials.
Metallurgical industry: melting and refining of metals.
Building materials industry: producing building materials such as cement and lime.
Environmental protection industry: handling hazardous waste and incineration of garbage.
In the field of new energy: calcination of positive and negative electrode materials for lithium batteries, such as lithium iron phosphate and ternary materials.

6. Customized design:
Furnace size and material: Select the appropriate furnace size and material based on the amount and characteristics of the material.
Heating method and power: Choose resistance heating, induction heating, or gas heating according to temperature requirements, and determine the heating power.
Temperature control accuracy: High precision temperature sensors and PID controllers are used to ensure temperature control accuracy between ± 1 ℃ and ± 5 ℃.
Atmosphere control: It can be equipped with an atmosphere control system that supports various atmospheres such as nitrogen, argon, hydrogen, etc., to meet specific reaction requirements.
Security protection: integrates functions such as over temperature alarm, leakage protection, vacuum monitoring, and gas leakage alarm to ensure the safe operation of the equipment.