How to use a high temperature box type resistance furnace

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1. Before opening the furnace, the tightness of the gas pipeline valve and the pressure on the gas pipeline should not be lower than the regular value.

2. The task status of the empty furnace experimental push rod mechanism, pull rod mechanism and lifting mechanism.

3 Loosen the hold-down spring into the regular size area.

4. Adjust the water level of the water seal, open the valve of the extinguishing pipe discharged by the water seal, and close the valve of the water seal.

5. Close the furnace door at the feeding end, open the furnace door at the discharge end to observe, and close the furnace door when the direction of the kerosene spraying out of the mist activity is normal.

6 Ignite the extinguishing nozzle in the feed room.

7. The exhaust gas should be discharged through the valve that is not sealed by water.

8 Continuous consumption first carburizes the furnace tank.

9. When the parts are placed, the distance between the parts shall not be less than 5 mm; The edge of the part does not exceed the length of the base plate and the regular height.

10 The inlet and outlet doors should be opened and closed quickly, but the speed of the push-pull lever should be bumpy.

11 The position of the parts in the pre-cooling chamber should be directly opposite the thermocouple.

12. Only 24 chassis are allowed to be filled in the furnace, and the continuous feeding must be pulled first and then pushed.

13. When the furnace is stopped, the furnace area should be lowered to the same temperature, and then the natural cooling should be started.

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1. When the chamber furnace is used for the first time or after a long period of out-of-use, the oven must be baked. The time of the oven should be 200 hours at room temperature. 200 to 600 four hours.

When using, the maximum furnace temperature shall not exceed the rated temperature, so as not to burn the electric heating element. It is forbidden to pour all kinds of liquids and dissolved metals into the furnace, and it is best to work below the maximum temperature of 50 degrees below the maximum temperature of the Maofrich furnace, when the furnace wire has a long life.

2. The chamber furnace and the controller must work in a place where the relative temperature does not exceed 85% and there is no conductive dust, high-quality gas or corrosive gas. When metal materials such as grease are attached and need to be heated, a large number of volatile gases will affect and corrode the surface of the electric heating element, destroying it and shortening its life. Therefore, when heating, it should be prevented in time and sealed containers or properly opened holes to eliminate them.

3. The box furnace controller should be limited to the ambient temperature range of -10-75.

4. According to the technical requirements of Jingxiu Thermal Engineering, regularly check whether the wiring of the electric furnace and controller is good, whether there is any stuck and stranded phenomenon when the indicator pointer moves, and use the potentiometer to calibrate the error increase caused by the magnetic steel, demagnetization, wire expansion, fatigue and balance damage of the shrapnel.

5. Do not pull out the thermocouple suddenly at high temperature to prevent the coat from bursting.

6. Keep the furnace clean frequently, and remove oxides and other things in the furnace in time.

The box-type resistance furnace is made of rectangular shape, the task room is made of high-quality carbon capsule filling machine silicon refractory material, the furnace shell is made of high-quality cold-rolled steel plate by small pellet machine folding and welding, and the furnace chamber and the furnace shell are made of high-quality insulation materials as thermal insulation layer. In order to increase the heat loss of the furnace mouth and improve the average temperature in the furnace chamber, the muffle furnace is equipped with a heat baffle made of high-quality refractory materials on the inside of the furnace door.

Structure and working principle.

The shell of the resistance furnace is made of high-quality cold-rolled steel plate or stainless steel shell, the surface is sprayed by process, the furnace door adopts a full-door structure, and the opening and closing are flexible.

Structural features 1. The appearance is treated with high-temperature resistant and corrosion-resistant paint.

2. The console adopts a smart PID digital display controller, with good stability, high precision, equipped with an ammeter and a novel structure.

3. The furnace door is thickened and reinforced to prevent deformation.

4. The furnace lining is made of high-quality insulation cotton, which has good insulation effect.

5. The furnace temperature is detected from time to time (the actual temperature of the furnace is also displayed without heating, which is convenient for observing the furnace temperature at any time).

6. The wiring is simple, the diagram is clear, and the operation is convenient. 7. It has overload protection and short-circuit protection.

8. The furnace shell is made of high-quality steel plate folding and welding, the studio is a furnace made of refractory materials, the heating element is placed in it, and the furnace and the shell are masonry with thermal insulation materials. As the name suggests, a box-type resistance furnace is shaped like a rectangular box.

Safe operating methods.

1. Do not exceed the maximum temperature of the resistance furnace when using.

2. Be sure to cut off the power supply when loading and taking the sample to prevent electric shock.

3. The opening time of the furnace door should be as short as possible when loading and taking the sample, so as to prolong the service life of the electric furnace.

4. It is forbidden to pour any liquid into the chamber furnace.

5. Do not put the sample stained with water and oil into the furnace; Specimens should not be loaded with clamps stained with water and oil.

6. Wear special gloves when loading and taking samples to prevent burns.

7. The sample should be placed in the middle of the furnace, neatly placed, and should not be placed indiscriminately.

8. Do not touch the electric furnace and the surrounding samples.

9. The power supply should be cut off after use.

10. Non-professional operators are not allowed to operate the resistance furnace and operate in strict accordance with the operating procedures of the equipment.

Box-type resistance furnace use.

The box-type resistance furnace is suitable for all kinds of colleges and universities laboratories, industrial and mining enterprise laboratories, for chemical analysis, physical determination, sintering and dissolution of metals and ceramics, heating, roasting, drying, heat treatment, etc.

The box-type resistance furnace is mainly suitable for quenching, normalizing, annealing, quenching and tempering heating of carbon steel, alloy steel and other workpieces. The box-type resistance furnace is suitable for heat treatment of various small parts, springs and molds. The new energy-saving furnace lining is adopted, the temperature rises quickly, the loss of the empty furnace is small, and the energy saving is more than 20% compared with the old products.

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Summary. The temperature difference of the box-type resistance furnace is generally around 3 as the normal range.

The temperature difference of the box-type resistance furnace is generally around 3 as the normal range.

You've done a great job! Can you elaborate on that?

Under normal circumstances, the temperature difference of the box void god resistance furnace should be within 3, if the temperature difference exceeds 3, it may be caused by the uneven temperature distribution inside the resistance furnace. Reasons:1

The uneven temperature distribution inside the resistance furnace may be caused by the uneven heat distribution inside the resistance furnace, such as the uneven heat source inside the resistance furnace, or the uneven heat conduction inside the resistance furnace. 2.Improper temperature control inside the resistance furnace may be caused by improper temperature control inside the resistance furnace, such as incorrect temperature control system inside the electric car Yuyuan resistance furnace, or incorrect temperature control parameters inside the resistance furnace.

Workaround:1Check the heat distribution inside the resistance furnace to ensure that the heat distribution inside the resistance furnace is even, so as to ensure that the temperature distribution inside the resistance furnace is uniform.

2.Check the temperature control system inside the resistance furnace to ensure that the temperature control system inside the resistance furnace is correct to ensure that the temperature control parameters inside the closed-state resistance furnace are correct. Personal Tips:

1.When using the resistance furnace, attention should be paid to check the heat distribution and temperature control system inside the resistance furnace to ensure that the temperature distribution inside the resistance furnace is uniform. 2.

When using the resistance furnace, attention should be paid to checking the temperature control parameters inside the resistance furnace to ensure that the temperature control parameters inside the resistance furnace are correct. Related knowledge: A resistance furnace is an electrical appliance used for heating, and it works by converting electrical energy into heat energy, which increases the temperature of an object.

The temperature control of the resistance furnace refers to the process of controlling the temperature inside the resistance furnace, which can be achieved by controlling the heat distribution and temperature control parameters inside the resistance furnace.

Optomechanical Safety Operation Procedures [Printing] 1. Refuel each lubrication point before starting the machine. 2. Check whether there is any debris in the steel belt. 3. Tighten the steel belt before starting, and then run from low to high speed, and then turn it on.

1.Check the electricity safety before use, and start working after the indicators are detected.

2.During the test, protective measures such as gloves and masks should be taken to avoid inhaling harmful volatile gases from high temperatures.

3.The thermocouple is not easy to pull out at high temperatures, preventing the outer sleeve from bursting.

4.If the electric furnace is a vacuum-sealed structure, flammable and explosive gases cannot be introduced.

5.After a period of use, small cracks will appear in the furnace chamber, which is a normal phenomenon, which will not affect the experimental production, and can be repaired with alumina coating.

6.Do not leak the high-temperature solution to the bottom of the furnace, and the avoidance scheme can be isolated by backing plate or alumina powder.

7.The instrument should be placed in a well-ventilated place to keep the furnace clean.

8.1 1 Dan 3 7 now 2 have 1 so 6 obstacles 7, 8 stand 5 moments 7 off 1 closed power supply. Luo@Yangya Bo% kiln & furnace.

Box-type, you must not put things within 2 meters around, and the leakage switch and circuit breaker should be selected!

First of all, considering the life of the heating element and the furnace chamber and avoiding the quenching and heating of the furnace, it is recommended not to open the furnace door when the temperature is too high.

In addition, the heating rate of the high-temperature electric furnace is limited, it is best to be lower than the rated value, if it is too large, it will cause the program temperature to rise rapidly, thereby increasing the difference between the actual temperature and the electric furnace, at this time, the electric furnace will automatically increase the heating current, which will cause the current to rush too high. It will cause damage to the program setting module and cause the electric furnace heating program to fail. If the heating resistance wire is not exposed to the outside, there is no problem in opening the furnace below 200 degrees; If the resistance wire is exposed to the heating chamber, it is best to wait until it is below 100 degrees or even room temperature, or it will not cause damage to the furnace, and the heating resistance wire will cause damage due to the temperature difference.

You have to ask him if it is burned, it may be that the wire joints in the furnace are burned, or the heating element (furnace wire) is burned. (When the heating element is broken, there is generally a display, but the temperature does not go up.) Or maybe the temperature sensor (the thing that measures the temperature) burned out.

These are common failures.

Can I open the furnace door? Is that the question asked?

What do you mean by that?

1. a furnace door; 2-electric heating element; 3-furnace shell; 4-control box; 5- Lining.

It is mainly composed of two parts: furnace body and control box. The box-type resistance furnace generally works under the conditions of natural atmosphere, and is mostly used for internal heating, and refractory materials and insulation materials are used as the lining. It is used for heat treatment such as normalizing, annealing, quenching and other heating purposes of the workpiece.

According to the different heating temperatures, it is generally divided into three types, the temperature is higher than 1000 is called the high temperature chamber resistance furnace, the temperature between 600 and 1000 is called the medium temperature chamber resistance furnace, and the temperature is lower than 600 called the low temperature chamber resistance furnace to meet the needs of different heat treatment temperatures.

The shell of the box-type resistance furnace is made of high-quality cold-rolled steel plate, and the surface of the furnace is treated with spraying technology, and the furnace door is full of structure, and the opening and closing are relatively flexible. The casing of the box-type resistance furnace is made of a thin steel plate that is folded and then welded. Its furnace chamber is made of a box-shaped monolithic lining made of high-alumina refractory.

The heating element of the box-type resistance furnace is made of OCR25A15 iron-chromium-aluminum alloy wire wound into a spiral shape, and then worn into the wire grooves on the upper, lower, left and right of the furnace lining. The wire groove is connected to the furnace chamber, which allows the heating element to radiate heat directly to the furnace chamber. This can effectively speed up the heating rate of the furnace, thereby improving the accuracy of temperature control.

Between the lining and the shell of the chamber resistance furnace, aluminum silicate fiber felt, diatoms, and adobe bricks are also used as insulation.

The furnace door of the box-type resistance furnace is fixed on the panel of the electric furnace through the long arm of the multi-stage hinge, and the furnace door rotates more flexibly, and when it is closed, it is pressed down or pushed to the handle, and the door hook is buckled, and the furnace door will be tightly attached to the furnace mouth. When opening, you only need to lift the handle up or in, and after decoupling, push the door to the side.