Method for automatically controlling electrode with less carbon in calcium carbide furnace

Abstract

The invention discloses a method for automatically controlling an electrode with less carbon in a calcium carbide furnace. The method comprises the following steps of: collecting a real-time parameter value of an electrode in the calcium carbide furnace, converting the real-time parameter value into a direct current voltage analog signal and then converting into a digital signal through an A / D (Analog to Digital) sampling plate to perform an operation processing by a computer; carrying out a clamping processing on the electrodes with the maximum and the minimum displacement data when an absolute value of a relative displacement difference between any two phase electrodes is greater than a stored position deviation permissible value which is input to the computer through a keyboard in advance; and forcibly ascending the electrode when the electrode current at the lowest position maintains unchanged or continuously decreases. The invention has the advantages that the invention decreases the current value of the phase electrode through forcibly ascending the electrode so as to maintain the work position of arc discharge of the phase electrode in a proper position all the time for maintaining the normal operation of a smelting process of the calcium carbide furnace, thereby achieving the purposes of enhancing the electrical and thermal efficiencies, reducing the smelting power consumption and improving the yield.

Description

technical field [0001] The invention relates to an automatic control method, in particular to an automatic control method for electrodes with less carbon in a calcium carbide furnace. Background technique [0002] Calcium carbide furnace is a kind of submerged arc furnace series. The smelted product is calcium carbide. The core theory of its smelting is: through ionized air to form a directional high-temperature ion flow-arc, convert electrical energy into heat energy, and provide a high enough temperature for the reduction reaction field. [0003] The state of the arc depends on the distance between the electrode tip and the discharge body, the conductivity of the discharge body, the voltage, the temperature around the electrode, and the resistance characteristics of the charge medium. During the smelting process, as the liquid level (or slag level) of the molten pool at the bottom of the furnace continues to rise, the charge often stays down, the electrode tip moves up du...

AI Technical Summary

Problems solved by technology

[0004] During the smelting process of calcium carbide furnace, the ingredients are often uneven. When there is less carbon raw material around the electrode of one or two phases, it will cause the electrode of this phase to be inserted too deep or drop rapidly, which seriously affects the quality of the smelting process. Normal operation, resulting in lower output and higher power consumption

[0005] The existing automatic control system of calcium carbide furnace electrodes cannot handle the situation of low carbon in the furnace. When encountering such situations, the electrodes tend to drop rapidly, resulting in high power consumption and reduced output in smelting