The function of electrode tube in operation of calcium carbide furnace-Part
The function of electrode tube in operation of calcium carbide furnace-PartSelf-baking electrode is composed of electrode cylinder and electrode paste added i
The function of electrode tube in operation of calcium carbide furnace-Part
Self-baking electrode is composed of electrode cylinder and electrode paste added into the electrode cylinder. In the production process of calcium carbide furnace, the electrode paste below the conductive clip is roasted into mature carbon electrode by resistance heat, conduction heat and radiant heat, and is constantly consumed under the action of the end arc. The electrode cylinder needs to be continuously welded on the upper part of the electrode cylinder.Continuous production of self-baking electrode can be formed by adding electrode paste continuously in the electrode tube.
The role of electrode tube
Make electrode paste sintering model, power supply pole forming.Electrode paste during sintering molding is the small block, before gradually softened into a paste in the sintering process of viscous liquid, through the heat resistance, radiation heat conduction heat and volatile, sintering is gradually becoming one of the good conductive electrode, the electrode paste block and paste liquid electrode tube is the model block paste and liquid paste, soften the massive paste, sintering molding.
(2) The electrode bears part of the current during sintering and plays a conductive role.Before baking the electrode completely, the electrode paste has a high specific resistance (2001600μ ω ·m) between room temperature and 500℃. When the temperature is above 800℃, the electrode gradually becomes a conductive electrode with a resistance below 100μ ω ·m. Therefore, the electrode cannot completely transmit electrode current when the temperature is below 500℃.Part of the current also relies on electrode tube transmission.In general, the current density allowed to pass through the electrode tube section is 2.22.4A/mm2. If the thickness and diameter of the electrode tube iron sheet, the thickness and width of the rib plate and the number of the rib diameter and number of the electrode tube are known, the cross-sectional area of the electrode sheet can be calculated, thus the maximum current that the electrode tube can bear can be calculated.In the initial stage of electrode roasting, the electrode current must be controlled below the maximum current that the electrode tube bears, otherwise it will break down the electrode tube due to excessive current, resulting in electrode leakage or soft break accident.
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Article Tags:
electrode tube
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