The experimental multi-gradient tubular rotary furnace is a commonly used heat treatment equipment that combines multi-temperature zone gradient control with rotary functionality. Its core design lies in achieving uniform heating of materials through rotating the furnace tube, while utilizing multi-temperature zone gradients to meet complex process requirements. Let's take a closer look at the working principle, advantages, and application areas of the experimental multi-gradient tubular rotary furnace!

A commonly used experimental multi gradient tube rotary furnace (click on the image to view product details)

1. Technical principle: The synergistic effect of rotation and gradient
Rotating structure
The furnace tube can rotate 360 ° or tilt at a certain angle (such as 10 ° -20 °), and achieve uniform rotation through a gear, reducer, and motor drive system. Rotation keeps the material rolling inside the furnace, avoiding local accumulation or overheating, and ensuring uniform heat transfer. For example, in ceramic sintering experiments, powder materials are thoroughly mixed with rotation to improve sintering density.
Multi gradient temperature zone
The furnace tube is divided into multiple independent temperature control zones (such as 3-5 gradients), each equipped with independent heating elements (resistance wires, silicon carbide rods, etc.) and temperature sensors (thermocouples). Real time power regulation through PID control system to achieve precise temperature gradient control (± 1 ℃). For example, in the synthesis of nanomaterials, a low-temperature zone (200-400 ℃) can be set up for nucleation, while a high-temperature zone (800-1000 ℃) can promote crystal growth.
atmosphere control
The two ends of the furnace tube are sealed with stainless steel flanges, and inert or reducing gases such as nitrogen, argon, and hydrogen can be introduced to prevent material oxidation. Some models are equipped with vacuum pump interfaces and support heat treatment in vacuum environments (≤ 10 ⁻ ³ Pa).

2. Core advantages: Efficient, uniform, and flexible
Improved thermal uniformity
The rotating design increases the heating surface area of the material by 3-5 times, and the temperature difference is controlled within ± 5 ℃ (traditional tube furnaces can reach a temperature difference of ± 20 ℃). For example, in metal annealing experiments, a rotary furnace can eliminate the problem of uneven internal stress distribution and improve the consistency of material toughness.
Flexible and adjustable process parameters
Rotation speed: adjustable from 0-10 rpm, suitable for materials of different particle sizes (such as micron sized powders that require low-speed rotation to prevent splashing).
Tilt angle: 0 ° -30 ° electrically adjustable, optimizing material flow path (such as tilting 15 ° to prevent particle settling).
Temperature gradient: supports linear or nonlinear gradient settings, simulating actual working conditions (such as simulating temperature changes during charge and discharge cycles in battery material testing).
Energy saving and safety
Efficient insulation: Using ceramic fibers or nano insulation materials, the surface temperature is lower, improving thermal efficiency.
Multiple protections: over temperature alarm, leakage protection, gas pressure monitoring and other functions to ensure experimental safety.

3. Typical application areas
material science
Nanomaterial synthesis: Shape control of quantum dots, nanowires, and other materials is achieved through gradient temperature control.
Ceramics and Glass: Sintering ceramics such as alumina and silicon nitride, or melting glass to prepare thin films.
Metal heat treatment: Annealing, quenching, tempering to improve mechanical properties (such as grain refinement of high-strength steel).
new energy technology
Battery materials: Carbon coating and sintering of positive and negative electrode materials for lithium-ion batteries, such as lithium cobalt oxide, graphite, and lithium iron phosphate.
Fuel cell: catalyst preparation (such as reduction treatment of platinum carbon catalyst) and membrane electrode assembly (MEA) hot pressing.
Chemical Industry and Environmental Protection
Catalyst evaluation: Test catalyst activity under simulated reaction conditions (such as VOCs catalytic combustion).
Waste disposal: Pyrolysis of plastics and biomass to generate fuel oil, or thermal desorption for remediation of polluted soil.

4. Selection suggestions
Number of temperature zones
Select 3 temperature zones for basic research to meet the requirements of gradient experiments;
Industrial simulation or complex processes with 5 or more temperature zones, supporting multi-step reactions.
Furnace tube size
Laboratory level: inner diameter of 50-100 mm, length of 600-1200 mm, suitable for small batch (50-500 g) experiments;
Industrial grade: Inner diameter ≥ 150 mm, length ≥ 2000 mm, supports continuous production.
additional function
Program temperature control: supports more than 30 stages of heating/cooling programs to improve the automation level of experiments;
Data recording: Export temperature, atmosphere, and other data via USB or Wi Fi for easy analysis.

Multi gradient tubular rotary furnace commonly used in battery material heat treatment experiments (click on the image to view product details)

Summarize
The experimental multi gradient tube rotary furnace, through the collaborative design of rotation and gradient temperature control, greatly improves the uniformity of heat treatment and process flexibility, becoming a key equipment in fields such as materials science, new energy, and chemical engineering. When selecting, it is necessary to consider the experimental scale, process complexity, and budget, and prioritize models with high-precision temperature control, rotation and tilt adjustment, and safety protection functions.Click to learn more experimental tubular rotary furnaces! Or click on online customer service to learn more about product information!