Distribucija tehnologija silicij taljenje

Electric arc furnace is a device that uses the heat generated by the electric arc to heat. In the process of chemical silicon smelting, physical and chemical changes are closely related to electrical systems. The quality of power distribution operation has a very important impact on smelting efficiency. The arc mainly exists at the electrical end, and the cavity is subjected to the impact and thrust of the arc, which opens the material legs and forms a bulb shape. During the smelting process, the control of electrical parameters of the electric furnace is completed by the power distribution work. In general, it is to control the depth of electrode embedding. Shallow buried electrodes generally indicate an excess of reducing agent, the formation of a flame near the electrode, loud arc sound, low silicon temperature, low quantity, and high power consumption. Deep buried electrodes, if there is too little reducing agent in the furnace material, the electrode will be in a lower position. Because the resistance of the furnace charge increases with the decrease of carbon in the charge, the increase in resistance leads to a decrease in current load, an increase in electrode consumption, and a decrease in productivity. In production, the burial depth of electrodes is determined based on on-site operations. Adjusting the depth of electrode embedding is the best way to adjust the furnace condition by changing the resistance value of the furnace material. When the secondary voltage of the electric furnace exceeds a certain value, the electrodes will be damaged, the volatilization loss of silicon will increase, and the upper part of the furnace will overheat, resulting in increased heat loss. The secondary current is limited by the allowable current density of the electrode and cannot be arbitrarily increased.
The ratio of current to voltage is an important factor in furnace operation. If the current to voltage ratio is too small, the electrode cannot be removed, making it difficult to operate open arc production. The current to voltage ratio is too high, the electrode is inserted too deeply into the furnace material, and the production is not very ideal. In production, only when an appropriate current to voltage ratio is found, the working current is stable, the material is balanced, and the electrode is even raised or lowered, can the best production results be achieved. Adjusting the working voltage is an important means of adjusting the productivity of the furnace. The working voltage of the furnace depends on two aspects: on the one hand, the short network structure requires high Electrical efficiency and appropriate power factor. On the other hand, it is the furnace condition, including the furnace structure and production operation. The resistance value of the working resistance during smelting is crucial, and it is easy to change. Efforts should be made to stabilize it and approach the optimal value. In general, to ensure normal material surface temperature, increase the voltage. The normal material surface temperature for this package is around 600 degree C. When using raw materials that meet specifications, the larger the particle size of the furnace material, the smaller the resistance, the higher the branch current, and the less likely the electrode to penetrate.