How to extend the service life of Xining box type resistance furnace (intelligent integrated)

Abnormal operation of electric furnace wire muffle furnace, silicon carbon rod muffle furnace, and silicon molybdenum rod muffle furnace can shorten the service life of muffle furnace, so accurate operation is very important. So, how to operate accurately? Below, I will analyze in detail:

Electric furnace wire type muffle furnace

For initial use, the muffle furnace needs to be dried. When the electric furnace is used or used again after a long period of disuse, it is necessary to dry the furnace monotonically: according to the instructions of the controller, adjust the electric furnace to the standard power for use. After using or not using for a long time, it is necessary to dry the furnace before use to avoid excessive expansion and contraction of the furnace and door, which may cause breakage. Oven temperature and time:

*Step: Open the furnace door at room temperature to 200 ℃ for 2 hours

Step 2: Close the furnace door at 400 ℃ for 2 hours

Step 3: Close the furnace door at 600 ℃ for 2 hours

(If the temperature of the electric furnace is 900 ℃, it can be used after baking to 800 ℃, and if the temperature is 1200 ℃, it can be used after baking to 1000 ℃)

The wiring terminals inside the thermostat and the power connection wires between the furnace body and the thermostat should be twisted firmly to avoid touching and damaging electrical components. The firmness of each wiring terminal should be checked regularly, and the furnace interior should be cleaned before and after each use.

There is no conductive dust, explosive gas, or corrosive gas that can severely damage metal and insulation around the muffle furnace. Wet, flammable, and explosive materials should be placed inside the furnace for baking. The temperature controller should be kept at a distance of 30cm from the furnace body as much as possible. The temperature controller should be placed directly on the furnace body for operation, and the heated materials should be handled gently to avoid conflict and harm to the furnace.

Silicon molybdenum rod type muffle furnace:

The same operation process as the silicon molybdenum rod type muffle furnace needs to be repeated for the electric wire type muffle furnace. Of course, some details need to be paid special attention to. Below, I will briefly introduce them:

After discovering that the silicon molybdenum rod is damaged, it should be converted to a new silicon molybdenum rod with the opposite specifications and a resistance value close to it. When converting, first remove the maintenance covers and silicon molybdenum rod clamps at both ends, and then take out the damaged silicon molybdenum rod. As the silicon molybdenum rod is prone to breakage, be careful when using the equipment. Some of the exposed furnace shells at both ends should be flat, and the clamps must be tightened to ensure excellent contact with the silicon molybdenum rod.

After using it for a period of time, if the clamp has severe oxidation, it should be replaced with a new one. The gaps at the equipment holes on both ends of the silicon molybdenum rod should be plugged with pearl cotton or ceramic fiber insulation cotton. The furnace temperature of the muffle furnace shall not exceed the mission temperature of 1600 ℃.

After using the muffle furnace continuously for a long time, when the muffle furnace is used at normal high temperatures, the temperature rises to around 800 degrees, which can appropriately increase the power of the electric furnace. After reaching the required temperature, adjust the output knob of the dispatch controller to the standard power. Avoid using it for a long time beyond the rated power. If the heating power dispatch knob is turned clockwise to the desired direction, the heating current still cannot increase, indicating that the silicon molybdenum rod has aged and needs to be replaced.

The muffle furnace should be placed in a monotonically ventilated, non corrosive gas environment with an ambient temperature of 10-50 ℃ and a temperature not exceeding 85%. The specific operation shall be based on the silicon carbon rod type muffle furnace.

Silicon carbon rod type muffle furnace

In addition to the above operating procedures, attention should also be paid to the following details of the silicon carbon rod type muffle furnace:

After discovering damage to the silicon carbide rod, it should be replaced with a new one with the opposite specifications and a resistance value close to it. When converting, first remove the maintenance covers and silicon carbide rod clamps at both ends, and then take out the damaged silicon carbide rod. As the silicon carbide rod is prone to breakage, be careful when using the equipment. Some parts of the exposed furnace shell at both ends should be flat, and the clamps must be tightened to ensure excellent contact with the silicon carbide rod.

Assuming that the clamp has severe oxidation, it should be replaced with a new one. The gaps at the equipment holes on both ends of the silicon carbide rod are blocked with ceramic fiber board and insulation cotton. The furnace temperature of the experimental electric furnace shall not exceed the mission temperature of 1350 ℃.

The silicon carbon V-type mixer rod promises a continuous mission of 4 hours at temperature. After using the electric furnace for a long time, if the heating power dispatch button is turned clockwise to the desired direction, the heating current still cannot increase.

The distance from the rated value of the small labeling machine is far, and the required heating power cannot be achieved. It is explained that the silicon carbide rod has aged, and when the power is scheduled, it still cannot reach the satisfactory temperature. Therefore, it is necessary to replace the silicon carbide rod with the same resistance and specifications.

When modifying the connection method of the muffle furnace, it is not necessary to install silicon carbon rods. Only the connection method needs to be modified. After modifying the connection method, the heating power knob should be slowly adjusted from low to high when using the muffle furnace, and the heating current value should not exceed the rated value.

The instrument should be placed in the direction of a monotonically ventilated, non corrosive gas small mixer, with a mission environment temperature of 10-50 ℃ and a temperature not exceeding 85%.

To ensure accurate measurement, a DC potential difference meter is used annually to calibrate the temperature meter of the temperature controller to prevent significant errors.

Regularly inspect each part of the low-temperature box type muffle furnace for loose wires, ensure that the contacts of the communication touch device are outstanding, and promptly correct any defects that appear.

Specification parameters:

Furnace specifications:

Xining Box type Resistance Furnace (Intelligent Integrated)Special furnace dimensions can be customized according to customer requirements!

Reasons and solutions for temperature control faults in ceramic muffle furnaces

Temperature shows equilibrium solid

reason:

1. Poor contact of thermocouple grid;

2. Thermocouples have intermittent short circuits or road trips;

3. Thermocouples have intermittent grounding;

4. The status of thermocouples has been constantly changing;

5. Compensate for grounding, intermittent short circuit or road robbery of the wire;

6. Temperature display measuring tool malfunction;

Solution:

1. Reconnect the thermocouple;

2. Review thermocouples to eliminate fault points or replace them;

3. Eliminate contact points;

4. Flow good thermocouples;

5. Review and repair wires to eliminate fault points;

6. Repair or replace the temperature display meter;