3 Zone Tube Furnace
2.Lab Box Furnace Equipment:1L-36L
3.Working Temperature can reach 1200℃-1700℃
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Description
Technical Parameters
In the realm of materials science and engineering, the 3 zone tube furnace stands as a pivotal piece of equipment, offering unparalleled versatility and precision in heat treatment processes. This sophisticated instrument is designed to cater to the diverse needs of researchers and industrialists, enabling them to explore new materials, optimize existing processes, and achieve unprecedented levels of control over material properties. With a detailed exploration of its design, functionality, applications, and future innovations.
The furnace tubes of 3 zone tubular furnaces are usually made of quartz, ceramic, or metal and are used as crucible, where the material is heat treated. Heating elements, usually resistance heaters or induction coils, are strategically placed around the tube to ensure an even distribution of heat within each area. Advanced temperature control systems using thermocouples or pyrometers to monitor and regulate the temperature in each zone with high precision.
Parameter


3 Zone Tube Furnace-Operation guide
Preparatory work
Design rise and fall curve: Design reasonable rise and fall curve according to experiment or process requirements. The heating rate should not be higher than 10 ° C/min, and the cooling rate should be lower than 15 ° C/min.
Clean the environment: keep the operating environment clean and clean to avoid debris interfering with the operation.
Check the equipment: check whether the oil line of the mechanical pump is above the line, remove the two end covers, and clean the corundum furnace tube with a vacuum cleaner.
Place the sample: Push the sample boat into the middle of the corundum tube furnace (the constant temperature length is usually 10cm), plug two insulated furnace plugs, so that the end of the second furnace plug is flush with the side of the furnace body.
Install flanges: Install the gas furnace flanges, ensure that the sealing gasket falls into the slot, assemble the inner flange sleeve, sealing ring, pressure ring, sealing ring, and outer flange sleeve in the order of assembly, and evenly fasten the three hexagonal screws in turn several times to ensure that the flange does not skew.
Charge gas




Connect the ventilation path: Select the appropriate working gas (such as hydrogen, inert gas, etc.) according to the experimental requirements, and connect the ventilation path.
Leak detection: If hydrogen is used as the working gas, soapy water should be used to detect the leak at each joint to ensure that there is no gas leakage.
Open the valve: Open the hydrogen cylinder main valve, outlet pressure reducing valve and other valves in order to adjust the outlet pressure to the appropriate value. If inert gas is used, it is also necessary to connect the mechanical pump for evacuation operation.
Adjust the gas flow rate: By adjusting the flow meter knob, the gas flow rate can meet the experimental requirements. It is usually determined by the continuous bubbling of a bubble in the safety bottle.
Blow-on
Power on: Turn on the power after the air switch is turned on.
Start panel: Power on panel (turn Lock knob clockwise) to start panel.
Set the program temperature: Press Enter to enter the time setting state, by pressing the left key to move the cursor, press the up key and down key to adjust the time setting value. Then set the temperature curve and holding time and other parameters.
Start heating: Press the green TurnOn key to start the heating power supply. Observe the ammeter and voltmeter to ensure that the working current does not exceed the rated value.
Monitoring process: In the heating, insulation, cooling process, closely monitor temperature changes and gas pressure. In case of tripping and other abnormal conditions, should be dealt with immediately.
Normal shutdown
After the program is completed, the main heating power supply automatically stops, and the instrument is in the initial state.
Press the red TurnOff key to disconnect the main relay.
When the temperature drops below 100 ° C, turn off the Lock to cut off the panel control power.
Close gas line components such as cylinder valve doors and pipe furnace inlet and outlet valves.
Turn off the main power supply of the wall tube furnace.
Open the tube furnace end cover and take out the two insulated furnace plugs and sample boat.
Shut off the furnace improperly
If the furnace is not controlled by the program, press the up key for more than two seconds, and SV flashes Stop.
Press the red TurnOff key to disconnect the main relay.
Proceed with the normal shutdown procedure.
Applications in waste treatment
High temperature incineration treatment

Provide stable high temperature environment
The three-zone tube furnace can provide a stable high temperature environment, which is the key to the high temperature incineration of waste. By precisely controlling the temperature in the furnace, it can ensure that the waste is fully burned at a high enough temperature, thus effectively reducing the emission of harmful substances.

Reduce waste volume and mass
High temperature incineration can significantly reduce the volume and quality of waste, which is of great significance for reducing the pressure on landfill sites and saving land resources. At the same time, the ash generated by incineration can also be further processed and utilized, such as for the production of building materials.

Achieve harmless processing
During the incineration process, harmful substances such as organic pollutants and heavy metals in the waste can be decomposed at high temperatures or converted into harmless substances. This helps to reduce the pollution of the environment and achieve the harmless treatment of waste.
Resource utilization
Heat recovery
The heat generated during incineration can be recovered and used for purposes such as power generation or heating. This can not only improve the efficiency of energy use, but also reduce the dependence on fossil energy and achieve sustainable energy development.
Ash utilization
The ash generated by incineration can be used to produce building materials and road laying materials after treatment, so as to realize the resource utilization of waste. This helps to reduce waste disposal costs and improve economic efficiency.
Application advantage
Efficient processing
The three-zone tubular stoves have efficient processing capacity and can quickly handle large amounts of waste. This is of great significance for solving the problem of urban waste disposal and improving the level of urban environmental hygiene.
Good environmental effect
Through the precise control of incineration conditions and subsequent treatment process, the waste can be realized harmless and resource utilization. This helps to reduce environmental pollution and protect the ecological environment.
Strong adaptability
The three-zone tube furnace can handle many types of waste, including domestic waste, medical waste, industrial waste, etc. This enhances its flexibility and adaptability in practical applications.
Application example
In practical applications, the three-zone tube furnace has been widely used in the treatment of various wastes. For example, in the field of municipal waste treatment, the three-zone tube furnace can be used to incinerate domestic waste and medical waste; In the field of industrial waste treatment, it can be used to treat chemical waste residues, printing and dyeing wastewater sludge and other toxic and harmful wastes. These application examples fully demonstrate the extensive application prospects and significant advantages of the three-zone tube furnace in the field of waste treatment.
Application in phase transformation and crystal growth
Phase transformation
Phase transition refers to the transformation of a substance between different states, such as solid to liquid, liquid to gas, etc. The three-zone tube furnace provides a controlled high temperature environment that enables the material to undergo phase changes within a specific temperature range.
The three-zone tube furnace can be used to study the phase change behavior of various materials at different temperatures, such as the decomposition of metal solid solution, the ordering of alloys, the sintering of ceramics, etc. By precisely controlling the temperature and time, it is possible to observe the changes in the structure and properties of the material during the phase transition.
With the help of the three-zone tube furnace, researchers can study the dynamic process of phase transition, including the rate and mechanism of phase transition. This is important for understanding the nature of phase transitions and optimizing material properties.
Under high temperature and specific atmosphere, the three-zone tube furnace can promote the material to undergo new phase changes, so as to discover new phases or prepare new materials with special properties. This has an important role in promoting the development of materials science.
Crystal growth
Crystal growth refers to the process in which atoms, molecules or ions are arranged according to certain rules under specific conditions to form crystals. The three-zone tube furnace also has significant advantages in terms of crystal growth.
The three-zone tube furnace can form a certain temperature gradient by adjusting the temperature of different regions, which is essential for crystal growth. The temperature gradient can affect the convection of the melt and the diffusion of the solute, thus affecting the growth rate and morphology of the crystal.
In the process of crystal growth, the atmosphere and pressure have an important effect on the quality and performance of the crystal. The three-zone tube furnace can precisely control the atmosphere and pressure in the furnace to meet the needs of different crystal growth.
The crucible descent method (also known as Bridgman method) is a commonly used crystal growth method in three-zone tube furnaces. By melting the crucible containing the crystal raw material in the high temperature region and then slowly descending through the temperature gradient region, the melt begins to crystallize in the growing region and eventually forms the desired single crystal. This method can grow high quality, large size single crystals.
In addition to the crucible descent method, the three-zone tube furnace can also be used for other crystal growth methods, such as lifting method, zone melting method, etc. These methods have their own characteristics and are suitable for different types of crystal growth.
Application example
In practical applications, the three-zone tube furnace has been widely used in the study of phase transformation and crystal growth of various materials. For example, in the field of semiconductor materials, three-zone tube furnaces can be used to grow high-quality silicon, germanium and other single crystals; In the field of metal materials, it can be used to study the phase change behavior of alloys and prepare new materials with special properties. In the field of ceramic materials, it can be used to prepare high-performance ceramic products and polycrystalline materials.
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