What are the advantages of a vacuum induction furnace

What are the advantages of a vacuum induction furnace

First, let's take a look at the advantages of vacuum induction furnaces:
1, there is no air and vacuum induction furnace slag pollution, has certain environmental benefits, induction furnace smelting alloy is relatively pure, high performance level.
2, if the vacuum induction furnace smelting under the condition of vacuum, can go to gas to create a good environment, the content of such melting out of steel and alloy gas will be lower.
In a vacuum, the metal that is processed is not easily oxidized.
4, will be processed workpiece in smelting into some impurities, such as Pb, Bi, etc., and the impurities in the vacuum state can evaporate out part of this will make the material be purified.
When the vacuum induction furnace is smelting, it can use carbon to deoxidize, and the product of deoxygenation is the gas and the purity of the alloy is higher.
The vacuum induction furnace can accurately adjust and control its chemical composition, and can also use the return material.

Induction smelting technique is used in cast-iron production

Induction smelting technique is used in cast-iron production

At present, most used in cast iron production, the most common induction melting furnace with power frequency induction furnace and intermediate frequency induction furnace, the characteristics of various induction melting furnace as shown in table
The composition of iron liquid is small. But power frequency induction furnace melting speed is slow, go against slagging, start to start block cold furnace, the production is not flexible, so the power frequency induction furnace is commonly used in heating and the remelting of the metal. In addition, the power factor of the working frequency induction furnace is low, and it is necessary to allocate a large amount of compensation capacitor to increase the production cost.
The intermediate frequency induction furnace is efficient and high thermal efficiency, short smelting time, easy to realize process automation and production flexibility. The medium frequency induction furnace is suitable for smelting cast iron, especially suitable for smelting vermicular cast iron, nodular cast iron and alloy cast iron. It is also more adaptable to the furnace material, and the variety and block degree of the burden can vary widely.
Although the advantages of medium frequency induction furnace is more, fast development, but the power frequency induction furnace in iron liquid storage, heat preservation, adjust the alloy composition and superheat temperature, etc., is still a good equipment, especially for blast furnace, cupola melting furnace duplex furnace is still widely used.
With the continuous development and application of induction melting furnace in industrial production, cast-iron production has entered a new stage. Although power frequency induction melting furnace some deficiencies, but it in metal heating and heat preservation, as well as the adjustment of iron liquid component has a unique advantage, especially as with other furnace duplex stove is still widely used. Medium frequency induction melting furnace for melting cast iron, vermicular cast iron, nodular cast iron and alloy cast iron are particularly, shows the superiority of, make its in recent years in the present widely used in the production of cast iron new trend.

The process of vacuum induction smelting

The process of vacuum induction smelting

Description: vacuum induction smelting is a method of smelting of eddy heating furnace in a metal conductor under vacuum condition
Vacuum induction melting is under the condition of vacuum, using electromagnetic induction heating furnace charge to produce eddy current in the metal conductor melting method, has the melting chamber volume is small, short time and vacuum smelting period, is advantageous for the temperature and pressure control, recycling volatile elements, accurate control of alloy composition, etc. As a result of above characteristic, has now for the development of special steel, precision alloy, electrothermal alloy, high temperature alloy and corrosion resistant alloy, and other special alloy production of one of the important working procedure.

Cleaning of vacuum furnace

Cleaning of vacuum furnace

First you put the wash in the basket and push it inside, then tighten the door and tighten it. Use 30 minutes to heat the workpiece to 350 degrees and open the vacuum pump when the temperature reaches 340. It is important to observe whether the needle on the thermometer is gradually rising, and if there is no increase or speed, you need to check for leaks.
The temperature in the furnace is kept at 350 degrees for 90 to 120 minutes, and more than 80 percent of the experimental high polymer melt into the waste collection tank, which is cooled and then processed. The period can be increased or reduced according to the content of the high polymer. Then heat the oven to 480 degrees in 30 minutes.
In the furnace temperature of 500 degrees heat preservation after at least six hours, make the rest of the small amounts of polymer under the conditions of high temperature, vacuum, low oxygen, oxidative decomposition, this is the main stage can wash clean. During this time, the high polymer in the furnace will be decomposed into carbon dioxide and water. At this time, through the suction of the water ring vacuum pump, the carbon dioxide and water vapour generated in the furnace are processed by the water spray scrubber. As long as there is enough time, there will be no organic matter to be cleaned, and the process will be set at 7.5 or 8 hours, when the high polymer above is more.
Fourth steps to run after the procedure at the end of the whole, this furnace immediately with water and electricity meter electricity, only enter a state of natural cooling, without human intervention.