Graphite electrode in industrial silicon production and use of the general electrode joint shedding and electrode fracture problems, the following graphite electrode crushing manufacturer for you to introduce in detail some of the use of graphite electrode in industrial production problems and causes.
In industrial silicon production, the loosening of graphite electrode causes graphite electrode to fall into the furnace of smelting industrial silicon. At this time, not only production should be stopped, but also the graphite electrode should be removed from the furnace at a temperature of 2000 degrees, which is the last thing industrial silicon production wants to see. The main reasons for carbon electrode loosening are:
A. The electrode is not strong enough to tighten up, the electrode and the joint are not tightly connected, resulting in loose electrode.
B. The large deviation of thread machining tolerance and the inadequate machining precision of the joint lead to the vibration of the electrode caused by the impact of the electric pulse of the current when the electrode is in use. A series of vicious cycles will eventually lead to electrode loosening.
C. The reason for power transmission is due to incorrect phase sequence of three-phase alternating current, unstable voltage and uneven current.
D. The quality of the electrode joint itself is not good, such as poor material, high resistance, and so on.
The head of the electrode joint is cracked and dropped.
In industrial silicon production and smelting, the master button of graphite electrode part often breaks, or explodes, and the block master button part falls off. The phenomenon of graphite electrode falling off is serious. The reasons are:
A. Because of the low quality of power supply and the overload operation, the low voltage and the fluctuation amplitude of power supply make the current through the electrode change from big to small, extremely unstable, which destroys the heat balance state of the electric furnace, produces concentrated local stress, and the micro-crack inside the electrode expands under the action of the electric power, and finally in the electrode. The weak point is the phenomenon of the female button cracking and falling off at the electrode joint.
B. Improper operation of the manufacturer. Industrial silicon smelting temperature as high as more than 2000 degrees, now the working environment is relatively bad, some places just to make money without environmental awareness, dust everywhere, in this blanking is not blanking, or more blanking, graphite electrode will be squeezed by quartz stone and other materials, but also by mechanical ramming furnace in graphite electrode by. When the force is not uniform, the graphite electrode will break in the weak place, and the master button at the graphite electrode joint is the weakest place of the graphite electrode, so it is often broken here.
C. Graphite electrode has low flexural coefficient and graphite electrode has low flexural coefficient. Graphite electrode can not withstand the damage of uneven force from all aspects of production and use. The master buckle part of graphite electrode breaks at the weak part of graphite electrode.