Atmospheric Furnace Characteristics

Atmosphere furnace is a high temperature furnace which integrates the double characteristics of box and tube furnace. It is suitable for the experiment and production with large proportion of samples and the requirement of atmosphere. It adds the air inlet and outlet, the furnace body is sealed and welded. There is a ring of high temperature silicone rubber seal at the door of the furnace, and the sealing ring is equipped with water-cooling protection device. So vacuum ventilation atmosphere can be pumped during the test. The vacuum effect can reach 100 Pa.

Resistance furnace of tubular atmosphere furnace mainly uses metallurgical, glass, positive and negative materials of lithium battery, new energy and other materials under certain atmosphere and vacuum conditions. There are single tube, double tube, horizontal, vertical, open, single temperature zone, double temperature zone, three temperature zone, multi-temperature zone and other furnace types. Suitable for heating and sintering of small sample workpiece, with safe and reliable, simple operation, good temperature control **, good heat preservation effect, wide temperature range, high furnace uniformity, multiple temperature zones, optional atmosphere, vacuum furnace type, can compile 31 sections of program, working mode will put the furnace tube into the furnace for heating.

The atmosphere furnace uses silicon-molybdenum rod as heating element and double shell structure. Phase shift trigger and thyristor control. Furnace uses alumina polycrystalline fibre material, double shell is equipped with air cooling system, which can quickly cool down the temperature control system. Furnace uses shell integral seal, cover plate seal, silica gel pad and water cooling system. Gas enters and exits from the back chamber after flowmeter, and there are several inlets for furnace washing. The furnace has the advantages of balanced temperature field, low surface temperature, fast temperature rise and fall, energy saving and so on. It is an ideal product for atmosphere protection sintering and atmosphere reduction in universities, scientific research institutes and industrial and mining enterprises.

Вакуумная печь

VACUUM FURNACE

industrial vacuum pumps,vacuum furnaces

Design Requirements of Industrial Furnace

The design or modification of industrial furnaces should select the right type structure and new energy-saving materials to increase mechanization and energy utilization as far as possible according to production requirements.

1. The part of uniform heat transfer effect with circular furnace instead of box furnace can strengthen the premise of using reasonable fireplace and increasing the space volume of heat exchanger with workpiece surface without increasing. As a result of reducing the heat loss of the outer wall round furnace and the furnace wall, the heat loss is reduced accordingly.

2. Use high-speed burner or installation in furnace fan to improve convective heat transfer in furnace. Especially the small high-speed air flow destroys the heat and mass transfer of the heater which is stagnated on the surface, and the lower boundary of the interface reaction gas shortens the heating time, and accelerates the function of increasing the temperature of the workpiece.

Вакуумная печь для спекания

Вакуумная паяльная печь

Вакуумная термообработкаp

Maintenance of Vacuum Furnace

In the process of using vacuum furnace, we usually encounter the problem of carbon deposit. Today, let's analyze some reasons for carbon deposit in vacuum furnace.

1. No charcoal burning for a long time;

2. Failure of carbon controller;

3. Long-term use of high carbon potential, excessive flow of rich gas, easy to appear furnace carbon deposition.

4. Uncontrolled atmosphere

5. The easiest carbon deposit is inadequate methanol cracking.

6. Excess adsorption due to poor decomposition

If carbon deposits in radiation tubes, the consequences will be more serious. It is easy to cause the furnace temperature to rise up or slow. In this case, we can tell you that burning carbon in vacuum furnace can effectively remove carbon deposits on Anti-carburizing bricks and radiation tubes. The method is that when there is no product in the front and back chambers of the vacuum furnace, the temperature of the back chamber should be around 800 C. Then open the front door with a sickle, then extinguish the fire-fighting sickle; open the middle door for about one minute, and then open the middle door for another minute after five minutes (so repeated three times). The carbon deposit in the furnace burns almost.

Vacuum Heat Treatment Furnaces

Vacuum Brazing Furnace

Vacuum stripping furnace

The method of arc heating and smelting metal in vacuum strip-throwing furnace. The electrodes used in this smelting method are self-consuming electrodes and non-self-consuming electrodes.

Consumable electrodes are made of melted materials (i.e. furnace charge), which are gradually consumed in the process of vacuum strip throwing furnace melting, while non-consumable electrodes are made of high melting point materials such as tungsten, which are basically not consumed in the process of furnace charge melting. Vacuum arc furnace with consumable electrodes is called self-consuming electrode arc furnace, which is short for self-consuming electrode arc furnace. Vacuum arc furnace with non-consumable electrodes is called non-consumable electrode arc furnace, which is short for non-consumable electrode arc furnace.

At present, non-consumable electrode smelting has been less used, and consumable electrode smelting has been widely used in production practice, becoming one of the main means of secondary remelting. Crucibles for vacuum arc melting are usually made of copper and cooled by water outside, which is called water-cooled copper crystallizer.

In vacuum strip-throwing furnace, consumable electrodes (melted materials) can be connected with negative electrodes, and water-cooled copper crystals can be connected with positive electrodes. Arc discharge occurs between the two poles after electrification, which converts electric energy into heat energy and produces high temperature to melt materials. In the melting process, the liquid metal droplets fall into the metal melting pool after passing through the high temperature arc zone, and solidify into ingots in the water-cooled copper crystallizer. Through a series of physical and chemical reactions between liquid metal and gas as well as in the molten pool, the purpose of improving the purity of metal and its crystalline structure and properties is achieved.

Vacuum Sintering Furnace

Vacuum Debinding Furnace

Medium Frequency Induction Melting Furnace

The working frequency of IF induction smelting furnace is between 50 Hz and 10 kHz, which needs frequency modulation by frequency converter. Medium frequency induction smelting furnace has more advantages than power frequency induction smelting furnace because of its high electric and thermal efficiency, short smelting time, less power consumption, less land occupation, lower investment, flexible production and easy implementation of process automation. It is suitable for smelting all kinds of cast iron, especially alloy cast iron, nodular cast iron and vermicular cast iron. It has strong adaptability to burden, and the variety and size of burden can be changed in a wide range. Medium frequency induction smelting furnace has the advantages that other iron smelting furnaces do not have, so it has gained remarkable development in recent years, and has been widely used in cast iron production.

With the continuous improvement of power density of medium frequency induction smelting furnace, the requirement of safety, lining life and noise is becoming higher and higher, and the rationality of furnace body structure is becoming more and more important. Heavy steel shell furnace has many advantages such as strong durability, high efficiency and productivity, low noise, easy maintenance and repair.

Heavy-duty steel shell furnace is different from frame furnace. It has a high strength annular steel shell with several large checkpoints. When the furnace is running, the checkpoints are closed and each checkpoint can be opened. The internal structure of heavy-duty steel shell furnace is strong, which can avoid the deformation that may be caused by tapping and pouring, and prolong the service life of furnace lining. Moreover, the sound absorption and isolation material can be added to the enclosed solid steel shell and its interior, which greatly reduces the working noise. The strong steel shell can also effectively protect the induction coil from the danger of splashing metal, so that the furnace has the greatest safety in operation. In order to effectively insulate and heat preservation and prolong the life of lining, cooling rings are installed at the top and bottom of heavy-duty steel shell furnace, which plays the role of uniform lining temperature and reducing thermal expansion. The stainless steel cooling ring with low energy consumption and high strength greatly improves the furnace efficiency.

Lab Vacuum Furnaces

Vacuum Graphitizing Furnace And Carbonization Furnace

Safety Characteristics of Vacuum Furnace

Vacuum furnace heat treatment is a comprehensive technology combining vacuum technology and heat treatment. It refers to all and part of the heat treatment process carried out in vacuum. China divides vacuum into low, medium, high and ultra-high vacuum. At present, the working vacuum of most vacuum heat treatment furnaces ranges from 1.33 to 1.33 x 10 Pa.

Vacuum heat treatment can achieve almost all heat treatment processes, such as quenching, annealing, tempering, carburizing, nitriding, gas quenching, oil quenching, nitrate quenching, water quenching, vacuum brazing, sintering, surface treatment and so on. Vacuum heat treatment furnace has high thermal efficiency, can achieve rapid heating and cooling, can achieve no oxidation, no decarbonization, no carburization, can remove the phosphorus chip on the surface of the workpiece, and has the function of degreasing and degassing, so as to achieve the effect of surface bright purification.

Generally speaking, the processed workpiece is heated slowly in the furnace, the difference of internal heat temperature is small, and the thermal stress is small, so the deformation is small. The qualified rate of products is high. The utility model can reduce the cost and has the function of degassing, thereby improving the mechanical performance and service life of the work. Good working environment, safe operation, no pollution and pollution. The treated workpiece has no danger of hydrogen embrittlement. It can prevent surface hydrogen embrittlement of titanium and refractory metal shell. The vacuum heat treatment process has good stability and repeatability. This series of advantages, the development of vacuum heat treatment equipment and process has been more and more attention and application.

Vacuum Brazing Furnace

Vacuum Induction Melting Furnaces

Production and Operation Flow of Vacuum Furnace

Work in the production workshop needs to be done with great care. A little carelessness will have inestimable consequences for life and safety. Especially in industrial production, we all know that Luoyang Kiln Factory is a big factory. The teachers in the experimental electric furnace, high temperature electric furnace, tubular furnace and vacuum furnace are trained and possessed before they go on duty. Certain experience shows the rigor of the production process, so what can be done to minimize the danger point in the specific operation of the vacuum furnace?

Every master of vacuum furnace knows how to start the power supply of vacuum furnace and set the switch of control cabinet at the position of automatic control. The parameters of the vacuum furnace process regulations are input into the computer. The workpiece is then smoothly fed into the furnace with a loading trolley, and the door (cover) is closed and locked to ensure sealing.

The cooling medium, cooling mode and pressure of vacuum furnace should be selected according to the technological requirements. Press the cycle start button, and the equipment executes the program: vacuum heating cooling is automatically completed. Remember to always check whether the equipment system is working properly, and report any abnormalities to the foreman in time. Before discharging, the normal pressure in the furnace should be restored, and the door (cover) should be opened after the indicator lamp is normal. When discharging, careful operation should be taken. No workpiece or tooling should collide with the furnace mouth.

Vacuum Debinding & Sintering Furnace

Vacuum Heat Treatment Furnaces