The phenomenon of electromagnetic induction was discovered in the early 19th century, and it was known that a conductor in an alternating magnetic field would induce a current to produce heat. However, this heat has long been regarded as dissipation and every effort has been made to reduce it in order to protect electrical equipment and increase its efficiency. It was not until the end of the 19th century that people began to make use of this heat for purposeful heating smelting, heat treatment and diathermy of various thermal pressures, and the experimental electric furnace appeared. The early experimental electric furnace was a slotted layer melting furnace, which was born in Sweden in 1899 and is now rarely seen. From 1914 to 1918, closed flume type core melting furnace began to appear in the industry. A high - frequency non - core furnace also appeared in this period. By the 1930s, intermediate frequency smelting equipment has begun to put into operation, following the step: the rise of frequency electric furnace. The experiment of induction heating heat treatment was in the 1920s.
As the name suggests, the experimental electric furnace is mainly used for experiments, and is mostly used for quantitative analysis of sintering and ashing tests. It is a kind of intermittent resistance furnace, but not to say that intermittent electric furnace is the experimental electric furnace. Experimental electric furnace is mainly used for experiments, mostly used for quantitative analysis of sintering, ashing test, is a kind of intermittent resistance furnace. Nowadays, it is used for experiment and small batch production in colleges and universities, industrial and mining enterprises.
The resistance wire of the experimental electric furnace is generally arranged in the firebrick hole of the furnace. Sometimes, a part of the resistance wire is burned off, resulting in the single electric furnace can not be used, double parallel electric furnace unilateral heating, affecting the furnace temperature uniformity and increase the heating time. After the above situation occurs, the electric furnace can be turned over 90° so that the furnace door touches the ground. Screw the screw that fastens the iron plate of the back wall, remove the iron plate, and take out the thermal insulation brick at the back end, and then the firebrick and resistance wire of the back wall can be seen. The ohmic range of the multimeter is used to measure the resistance of two adjacent holes one by one. If the resistance value is very high, it is the stagnation of the resistance wire when it is burned off. Short connect the two holes of rhJ circuit, l bad technology is installed without bricks and back wall iron plate as is, the furnace can continue to use.
On 2018-08-08 11:45:46
