High temperature atmosphere box furnaceThe operation must follow strict steps, including equipment inspection, sample preparation, parameter setting, operation monitoring, and shutdown maintenance. The specific operation steps are as follows:
1、 Preparation before operation
Equipment inspection
Confirm that the furnace body is free of cracks or damage, the power cord is tightly connected, and the grounding protection is reliable.
Check whether the heating elements (such as silicon carbide rods and heating wires) are intact to avoid interruption of the experiment due to malfunction.
Verify that the temperature control system, gas supply device (such as float flowmeter), and cooling system (such as circulating water circuit) are operating normally.
Sample preparation
Select suitable materials according to experimental requirements to ensure that they can withstand the target temperature (such as industrial grade furnaces reaching 1700 ℃ or above).
Cut the sample size to fit the furnace space and avoid hot spots caused by concentrated placement.
Use crucibles to carry materials, prevent direct contact with the furnace, and reduce the risk of pollution.
Environmental Requirements
The equipment should be placed in a place with good air circulation, no vibration, no flammable or explosive gases, or high dust.
Ensure good ventilation to prevent the accumulation of harmful gases released by the sample at high temperatures.
2、 Parameter Setting and Startup
Temperature program setting
Heating curve: Set a stepwise heating program based on material characteristics (such as holding at 200 ℃ for 2 hours) to avoid sudden cooling and heating that may cause sample fracture. The heating rate is generally controlled between 5 ° C-20 ° C/min.
Target temperature: Enter the desired temperature value to ensure that it does not exceed the rated temperature of the device (such as 1050 ℃).
Insulation time: Set the heating time to ensure sufficient reaction or sintering of the material.
Cooling program: If slow cooling is required, set the cooling rate (such as 5 ° C/min) to prevent crack formation.
Atmosphere control (if necessary)
Check the gas supply system to ensure that the flow rate and pressure meet the experimental requirements (such as oxygen, nitrogen, or vacuum environment).
The furnace adopts an external sealing method, with a silicone seal at the furnace mouth and a waste gas discharge port at the top.
Start the device
Connect to the main power supply, turn on the power switch, and the instrument light will turn on.
Enter the temperature control program curve, press the start button, and the main contactor will close.
Press and hold the key on the temperature control meter for 2-5 seconds, and the instrument will enter automatic control mode (RUN light on).
3、 Operation monitoring
Real time observation
Pay close attention to temperature changes, the working condition of heating elements, and the atmosphere inside the furnace to ensure that the equipment operates according to the set program.
If the temperature deviation is large, adjust the temperature control parameters appropriately (such as M5, P, t values).
exception handling
If abnormal conditions such as overheating, electrical leakage, or gas leakage are detected, immediately stop heating and cut off the power supply.
It is strictly prohibited to disassemble the equipment by oneself, and professional personnel are required to troubleshoot.
4、 Shutdown and Cleaning
Stop heating
After the experiment, gradually reduce the temperature to a safe range (such as room temperature) to avoid the sample from cracking due to sudden cooling.
Press the stop button to disconnect the main contactor and turn off the control power switch.
Take out the sample
After the furnace temperature drops to a safe level, open the furnace door and quickly remove the sample using crucible tongs.
Close the furnace door and lock the valve to prevent external air from entering and affecting the atmosphere inside the furnace.
Equipment maintenance
Clean up the residue inside the furnace, keep the furnace dry, and avoid corroding the heating elements.
Regularly inspect the sealing ring, temperature controller, and gas supply device to ensure that the equipment is in good condition.
After a new furnace or long-term shutdown, it is necessary to divide the furnace into sections (such as 2 hours each at 200 ℃, 300 ℃, and 400 ℃) to remove moisture from the furnace.
5High temperature atmosphere box furnaceSafety precautions
personal protection
Wear heat-resistant gloves, goggles, and protective clothing during operation to prevent burns or splashes.
Stay away from high temperature areas and avoid direct contact with the furnace body or heating elements.
Operating Specifications
It is strictly prohibited to put flammable and explosive materials into the furnace to prevent fire or explosion.
Do not leave the post for monitoring to ensure timely handling of abnormal situations.
Emergency handling
Immediately cut off power in case of malfunction, close the gas supply valve, and evacuate personnel to a safe area.
Record the fault symptoms and time, and contact professional maintenance personnel to investigate the cause.