A brief introduction of medium frequency melting furnace

A brief introduction of medium frequency melting furnace

Medium frequency melting furnace is a kind of will power frequency 50 HZ alternating current into intermediate frequency (above 300 HZ and 20 k HZ) power supply device, induction coil, deserve to go up and compensation capacitor, applying the principle of electromagnetic induction heating equipment, widely used in non-ferrous metal melting, heating.
 Such as molten pig iron practice, ordinary steel, stainless steel, tool steel, copper, aluminum, gold, silver and alloy, etc.; Diathermy forging USES the steel parts, copper parts, used for extrusion forming of aluminum ingots, tempering, quenching heat treatment of metal. Medium frequency melting furnace heating device has small volume, light weight, high efficiency, the advantages of hot working quality and favorable environment, are quickly eliminated coal furnace, gas furnace and oil furnace and ordinary resistance furnace, is the new generation of metal heating equipment.
 Medium frequency melting furnace is a main equipment in the foundry, stability, reliability and security of its work is flow process of casting production line ensure normal and stable work.

Medium frequency induction furnace

Medium frequency induction furnace

Intermediate frequency furnace power supply system is one of the biggest amount of harmonic in power system harmonic source, common has the power of the medium frequency furnace and high frequency induction furnace. The six pulse intermediate frequency furnace, mainly produce 5, 7, 11, 13 second-class characteristic harmonic; For 12 pulse converter medium frequency furnace, mainly produce 11, 13, 23, 25 inferior characteristic harmonic. In general, small converter device adopts 6 pulse, relatively large adopts 12 pulse. Such as furnace transformer connect/delta Y/Y type, or to use two electric furnace transformer power supply.
For intermediate frequency furnace filter unit, we have many successful running of equipment. General design of two or more circuit, combined filtering methods for harmonic governance:
1, according to different medium frequency furnace, provide you with special filter and reactive power compensation of complete sets of equipment;
2, according to different management goal, the demand of the actual working condition, we reasonable design filter compensation scheme for you;
3, according to the actual number of intermediate frequency furnace and the load distribution, reasonable design is a single governance medium frequency furnace, or more than one centralized management;
4, according to your actual demand of industrial, we reasonable design filter compensation scheme for you, to meet the diverse needs of your industrial and mining.

The structure of the medium frequency melting furnace

The structure of the medium frequency melting furnace

Medium frequency melting furnace furnace shell structure is divided into two kinds of aluminum and steel shell structure: small capacity furnace shell generally adopt aluminum alloy material, reasonable structure small volume, convenient installation, simple maintenance, low maintenance cost. Large capacity of intermediate frequency furnace shell adopts steel structure, furnace body structure is composed of the fixed frame of blast furnace and ontology, furnace fixed frame and the furnace USES the integrity of the skeleton structure. Furnace body is rotated by a hydraulic system control, depend on either side of the furnace to achieve two hydraulic cylinder jacking, and furnace is reset by the pressure of the furnace body weight of produce.
Furnace iron liquid height and diameter is quite high. This reference foreign advanced type furnace, furnace is set on the basis of computer analysis, slim than increase, improve natural power factor, power efficiency was improved. Furnace built-in copying yoke, magnetic yoke block can reduce the magnetic flux leakage, prevent furnace heating, improve efficiency. At the same time as supporting effect, induction coil, fixed yoke furnace to achieve high strength and low noise. Yoke is to use cold rolled silicon steel sheet, stainless steel plate produced by crescent-shaped yoke, the combination of core and coil surface for circular arc surface, pressure JinChu is a surface rather than a line in the past, the structure of the compaction effect is good, less magnetic flux leakage. For the silicon steel sheet pile, instead of a cast, a splint dedicated to tighten, without special wear heart screw tightening, this structure can make full use of the permeability of silicon steel sheet area, reduce the probability of local heating.

Characteristics of medium frequency furnace melting furnace series

Characteristics of medium frequency furnace melting furnace series

(1) melting with high efficiency power-saving effect is good, compact structure, strong overload capacity.
(2) low temperature around the stove, smoke less, good working environment.
(3) simple technology, melting operation and reliable operation.
(4) metal ingredients evenly.
(5) melting heat up fast, easy temperature control, high production efficiency.
(6) high utilization rate of intermediate frequency furnace, easy replacement of varieties.
(7) long arc yoke shielding magnetic flux leakage and reduce the external magnetic resistance, shielding at the ends of the coil magnetic flux leakage and magnetic yoke cross section is the inside of the arc at outside Wall seamless to increase the effective permeability area, make the better support. Unique positive and negative spiral coil greatly improve the efficiency of the system.

Principle of intermediate frequency furnace by what job

Principle of intermediate frequency furnace by what job

How intermediate frequency furnace works, the principle of intermediate frequency furnace is what? , for example, put a metal cylinder has alternating medium frequency current in induction coil, metal cylinder has no direct contact with induction coil, electric coil temperature is very low, but the surfaces are heated to redness, and even melt, and the redness and melting speed as long as adjust the size and the strength of the current frequency can be achieved. If the cylinder on the coil center, surrounding the cylinder temperature is the same, the cylinder heating and melting did not produce harmful gases, light environmental pollution.
Here is to introduce: medium frequency furnace is a kind of will power frequency 50 HZ alternating current into intermediate frequency (above 300 HZ and 20 k HZ) power supply device, the three-phase alternating current (ac) power frequency, after rectification into direct current, then laid adjustable intermediate frequency electric current, direct current supply by capacitance and induction coil in through the intermediate frequency alternating current, generate high density magnetic field lines in the induction coil, induction coil, and cutting in cheng fang of metal materials, produce a lot of eddy current in the metal materials. The vortex also has some properties of intermediate frequency electric current, i.e., the metal itself free electrons in the resistance of the metal body flow to generate heat.

A common use of vacuum furnace

            A common use of vacuum furnace

A common use of vacuum heat treatment furnace steel alloy. Many applications involving heat treatment of steel, makes it tough, through a service of quenching and tempering. Sclerosis involving heat the steel to a predetermined temperature, and then rapidly cooling.
The application of vacuum furnace brazing ideal choice. Brazing is a kind of heat treatment process, the other is used to connect two or more base metal parts, through the filler metal melting thin layer in the space between them.
Further applications of vacuum furnace, vacuum carburizing, also known as the low pressure carburizing or LPC. In the process of gas (such as acetylene) was introduced to the temperature of the hot spots, usually in the partial pressure of 1600 f and 1950 f. Broken into its constituent elements (in this case, the carbon and hydrogen) gas. Carbon atoms, and then spread to the surface of the part of the area. Often repeat, the function of the input of the gas and the duration of the diffusion time. Work once the correct "shell", usually adopt oil or high pressure gas (HPGQ) normally, nitrogen or helium faster quenching induction quenching. This process is also known as case hardening.

Resistance furnace and Intermediate frequency furnace for melting aluminum

Resistance furnace and Intermediate frequency furnace for melting aluminum

Intermediate frequency furnace for melting aluminum has higher efficiency than the electric resistance furnace.
Medium frequency induction furnace to melt aluminum is based on the principle of electromagnetic induction heating, the heating efficiency can reach 0.59, and it can improve the melting rate by improving power.
The resistance type furnace with radiating heat to transfer Heat, according to the results of the previous design, the total efficiency is only 0.15 ~ 0.30.