1. Core structure and working principle of vertical tube furnace
Vertical furnace body design
The material is added from the top of the furnace, heated by the furnace, and discharged from the bottom. Gravity is used to assist in material transportation, reducing the risk of blockage. The heating elements inside the furnace (such as resistance wires and silicon carbide rods) are evenly distributed to ensure the uniformity of the temperature field, and the temperature difference can be controlled within ± 5 ℃.

Heating and atmosphere control
Heating method: Electric heating is the main method, which converts electrical energy into thermal energy through alloy wire or ceramic heating element, with high thermal efficiency.
Atmosphere control: Pre vacuum can be applied and protective gases such as hydrogen, argon, and nitrogen can be introduced to meet the requirements of oxidation, reduction, and other processes. For example, in the preparation of semiconductor materials, vertical tube furnaces can achieve processes such as oxidation, evaporation, and deposition by precisely controlling the atmosphere.

Combination of fluidized bed technology (optional)
Partial vertical tube furnaces integrate fluidized bed technology, where gas enters from the bottom and is distributed through a distribution plate to make solid particles fluidized, enhancing heat conduction and chemical reaction rate. It is suitable for powder material processing.

A commonly used multi zone vertical tube furnace (click on the image to view product details)

2. Performance advantages of vertical tube furnace
Compact structure, high space utilization rate
Vertical design reduces footprint, facilitates installation and movement, and is suitable for laboratory or industrial production line layout.

Uniform heating and precise temperature control
The heating elements are evenly distributed and combined with intelligent temperature control systems (such as PID closed-loop control), resulting in minimal temperature fluctuations and ensuring consistent product quality.

The atmosphere is controllable and the process adaptability is strong
Supports vacuum and various gas environments, and can simulate complex process conditions. For example, in metal heat treatment, high-strength metal connections can be achieved by heating in a vacuum environment; In ceramic sintering, a stable atmosphere environment can ensure the density of the product.

Efficient and energy-saving, in line with environmental trends
Adopting advanced insulation materials and heating technology, it has high thermal efficiency, lower energy consumption than traditional furnace types, and reduces operating costs.

Easy to operate, high safety
Equipped with high-definition touch screen and automatic protection functions (such as over temperature alarm and pressure control), reducing operational difficulty and accident risk.

3. Application fields of vertical tube furnace
scientific research
Material property research: Analyze the physical and chemical changes of materials at high temperatures.
New material preparation: such as semiconductor material oxidation, evaporation, deposition, and synthesis of nanomaterials.
Sample processing: Laboratory scale pyrolysis, gasification, and combustion experiments.

metal heat treatment
Quenching, tempering, and annealing: improve the mechanical properties, hardness, and strength of metals.
Welding: Heating metal parts in a vacuum environment to achieve high-strength connections.

Ceramic sintering
Manufacturing high-density and high hardness ceramic products, such as ceramic tiles and vessels.

glass processing
Hot bending, melting, vessel manufacturing, precise control of heating temperature and atmosphere environment.

new energy sector
Preparation and heat treatment of lithium battery positive and negative electrode materials to optimize material properties and stability.

Large industrial grade customized vertical tube furnace with preheating function (click on the picture to view product details)

4. Suggestions for selection of vertical tube furnace
temperature range
According to the process requirements, common models cover temperatures from 1000 ℃ to 1800 ℃, and some high-end models can reach temperatures above 2000 ℃.

Furnace size and material
Size: Depending on the material processing capacity, the effective heating zone length ranges from 100mm to 2000mm.
Material: Stainless steel, quartz or alumina ceramics. Quartz furnace tubes are suitable for high-temperature vacuum environments, and ceramic furnaces have strong corrosion resistance.

Atmosphere control ability
Confirm whether it supports vacuum and multiple gas inputs, gas flow control accuracy, and pressure range.

Temperature control system
Priority should be given to intelligent temperature control instruments, which support multi-stage program heating and have a temperature control accuracy of ± 1 ℃.

Security and Additional Features
Security protection: over temperature alarm, power outage protection, pressure relief valve, etc.
Additional functions: automatic feeding, water cooling, data recording and analysis, etc.Click to learn more Vertical tube furnaces! Or click on online customer service to learn more about product information!