Vacuum Induction Melting Furnace

2016年8月16日星期二

Aluminium scrap melting equipment - induction melting furnace

Common induction melting furnace, the core and has two kinds of core, the advantage of this furnace is:
(1) breathe in less and less oxidation burning loss, general metal aluminum burning only around 0.5%. Raw material broken hours is not 1%, up to 5% for aluminium scrap.
With a strong magnetic field lines (2) when the melt mixing, uniform composition, melting fast, very favorable for broken material.
(3) the unit power consumption is little, high thermal efficiency. In general, power consumption is 380 ~ 450 KWH/tons, thermal efficiency can reach 70%. Resistance furnace is corresponding to 430 ~ 600 KWH/t and 50%.
(4) covers an area of less, good operating environment
Defect is melting channel type induction furnace to replace the aluminum melting trench must be clear, when the species difficult. Followed by melting trench polluted by molten aluminum washout flake refractory in the melt.

2016年8月12日星期五

Induction melting inject new vitality for casting production

Medium frequency induction furnace is the main equipment in the foundry, stability, reliability and security of its work is flow process of casting production line ensure normal and stable work. At present, the induction melting furnace has been developed rapidly, has gradually replaced the cupola.
Induction furnace except to smelting in the atmosphere, can also in a vacuum and argon and helium protection atmosphere such as smelting, to meet the requirements of special quality. Compared with other melting furnace, in addition to the melting principle, have the following features:
(1) using electromagnetic induction heat the material directly, high thermal efficiency.
(2) due to the melting is not used in the air, burning less elements, less impurities mixed with.
(3) the operation is simple, composition adjustment, easy to add trace elements and temperature control.
(4) around the furnace heat and less smoke generates low, improve the working environment, good for the environment protection.
(5) cover an area of an area small.
(6) current density is high, suitable for high temperature melting.
(7) easy to realize automatic control, especially can use computer to process control.
(8) frequency magnetic field of molten metal has magnetic stirring effect, beneficial ingredients evenly, and dross, uniform composition and temperature of liquid metal.
The application of the induction heating technology in China, originated in the 1950 s, the technique of inductive heating almost entirely from the former Soviet union and the Czech republic and other countries, is mainly used in machine tools, textile machinery, automobile, tractor and other manufacturing industries. Induction heating power supply amount applied to industrial production is in the 1980 s.

2016年8月9日星期二

Vacuum induction furnace smelting ingot

Die casting process, commonly used vacuum induction smelting ingot quality has very big effect on its performance. Common defects cause analysis of ingot, the author of this paper, through the experiment of different solutions, choose suitable insulation riser, add heat preservation agent, to reduce the tundish on the surface of the molten steel level, increase the speed of pouring of casting, improve casting process stirring power and so on ways to improve the quality of ingot. The results show that the aluminum silicate fiber type riser and heat preservation heat preservation agent, upper steel ingot shrinkage cavity in the region of the riser, all it is open and centralized and; As soon as possible make the surface of molten steel in tundish height to a quarter of the tundish height, cold bean skin defects and slag on the surface of the steel ingot defect will greatly reduce; Improve the stirring power in the process of casting can reduce the chemical composition segregation of steel ingot.
Because under the condition of vacuum smelting can avoid the atmosphere produces in the process of melting and pouring easy oxidation of alloy elements, the problem such as burning, which can realize the precise control of chemical composition, it also has low gas content, low metal inclusions and low content of harmful impurity, making it the precise control of chemical composition, preparation of high purity materials. For steel material alloy content is not high, after pouring into ingot, that don't have to electroslag remelting or vacuum consumable secondary remelting, timber can be directly forged.

2016年8月4日星期四

Medium frequency induction furnace is suitable for steel casting production

Steelmaking method are many, mainly include induction furnace steelmaking, open hearth steelmaking, eaf steelmaking, etc. In the cast steel workshop in general use in electric arc furnace and induction furnace. They demand for raw materials is relatively loose, the refining of molten steel quality is higher, and the characteristic of steel cycle is suitable for steel casting production, furnace, the furnace is more convenient, easy to shape, box coordinated progress of pretreatment, easy to organize production. In addition, electric furnace steelmaking equipment is simple, less investment, infrastructure and capital recovery fast.
In recent years, the series intermediate frequency furnace steelmaking development gradually. Induction medium frequency electric furnace steelmaking process is simpler, molten steel quality can be guaranteed. Many factories to pouring small castings with induction furnace steelmaking, especially revestment precision casting workshop, widely used in induction furnace for melting steel.
In heavy machinery works, still use open hearth steelmaking, open hearth furnace capacity is generally larger than the electric furnace, using open-hearth steelmaking can be a devil out of a large number of molten steel, suitable for heavy castings poured too large and complex. Open hearth steelmaking cycle is long, however, a furnace smelting steel usually need to more than six hours of time. Open hearth furnace large and complex structure, low production, steel quality is better than electric furnace, so its development is limited by a lot of. In some countries, is no longer build new open hearth furnace.
In recent decades, medium frequency induction furnace steelmaking are widely used in steel industry, the steel method is fast, high productivity, molten steel quality is guaranteed, the furnace is applicable to steel ingot production.

2016年8月3日星期三

Medium frequency induction heating furnace for steel casting production

Steelmaking method are many, mainly include induction furnace steelmaking, open hearth steelmaking, eaf steelmaking, etc. In the cast steel workshop in general use in electric arc furnace and induction vacuum furnace. They demand for raw materials is relatively loose, the refining of molten steel quality is higher, and the characteristic of steel cycle is suitable for steel casting production, furnace, the furnace is more convenient, easy to shape, box coordinated progress of pretreatment, easy to organize production. In addition, electric furnace steelmaking equipment is simple, less investment, infrastructure and capital recovery fast.
In recent years, the series intermediate frequency furnace steelmaking development gradually. Induction medium frequency electric furnace steelmaking process is simpler, molten steel quality can be guaranteed. Many factories to pouring small castings with induction furnace steelmaking, especially revestment precision casting workshop, widely used in induction furnace for melting steel.
In heavy machinery works, still use open hearth steelmaking, open hearth furnace capacity is generally larger than the electric furnace, using open-hearth steelmaking can be a devil out of a large number of molten steel, suitable for heavy castings poured too large and complex. Open hearth steelmaking cycle is long, however, a furnace smelting steel usually need to more than six hours of time. Open hearth furnace large and complex structure, low production, steel quality is better than electric furnace, so its development is limited by a lot of. In some countries, is no longer build new open hearth furnace.
In recent decades, medium frequency induction furnace steelmaking are widely used in steel industry, the steel method is fast, high productivity, molten steel quality is guaranteed, the furnace is applicable to steel ingot production.
As the production and the development of science and technology, dc electric arc furnace, vacuum induction furnace and equipment of the new steel refining outside the furnace method appear constantly, melting molten steel quality is greatly increased, medium frequency induction heating furnace for steel casting production reason of casting quality will be improved in the future.

2016年7月27日星期三

Induction furnace and vacuum induction melting furnace

Vacuum induction melting furnace used for smelting heat resistant alloy, magnetic alloy, electrician alloy and high strength steel, etc. No.1 characteristic is in the process of smelting furnace temperature, vacuum degree and smelting time control easily, so the degassing burden can be quite sufficient. In addition, the alloy material to add quantity also can be precisely controlled, so is the lively element such as melting aluminum and titanium heat resistant alloy and precision alloy is suitable on the stove.
The induction melting furnace in addition has the general advantages of electricity, metallurgy, such as easy to cause must atmosphere, easy to adjust temperature specifications, and reduce metal loss and ensure the quality of the casting, improve productivity and reduce the labor intensity of workers, it is because of the effects of the electromagnetic stirring the liquid metal, to ensure the uniform for the alloy composition.

2016年7月22日星期五

What is a high frequency induction furnace

High frequency induction furnace is also called high frequency furnace, it is a kind of induction furnace. High frequency furnace heating mode is through the tube oscillation circuit to produce high-frequency electromagnetic fields, and then added to the sample, the sample to carry on the induction, produce eddy current (eddy current), resulting in a joule heat, melt sample heated up fast, so called high frequency induction vacuum furnace.
High-frequency induction is an advanced way of heating, because only in the sample is high frequency power output during burning, burning, after the completion of high frequency induction is stopped. High frequency furnace after the start, do not need temperature preheating time, may at any time of the sample for analysis.
Has a very excellent combustion performance, high frequency furnace carbon sulfur conversion rate were higher than tube furnace, carbon can think a few of 100%, sulfur according to relevant data, can reach more than 99%.
The prominent advantages of high frequency furnace is adaptable for samples, especially for tubular furnace, electric arc furnace special material is difficult to burn, for example, high chromium stainless steel, high manganese steel, electrothermal alloy, intermediate alloy, pure metal (Ni, Co, Cu, etc.), silicon in the alloy, chromium iron, ore, slag, sinter, oil shale, graphite, tungsten carbide, rare earth materials and various non-metallic materials, etc., all have good burning effect.

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