CGM Online

 Electrode accidents are common accidents in ferroalloys and calcium carbide enterprises smelted by submerged arc furnaces. The cause of electrode accidents is analyzed and judged accurately, and targeted preventive measures can be taken to reduce the occurrence of electrode accidents. However, due to the analysis of electrode accidents, it is supplied by electrode paste. The manufacturer and the electrode paste use the interference of multiple factors. To accurately determine the cause of the electrode accident requires objective evidence recognized by both parties, and the electrode section is a good objective evidence, so the analysis of the electrode section is of great significance. . 1. Electrode paste segregates, resulting in layering of aggregate and powder 1. Section status: There is obvious particle layer segregation on the section of the electrode. According to the size and cross-section of the radiant heat source for electrode baking, there are two situations, one is the ac

 The liquid electrode paste flows out from the damaged part of the electrode shell, which is called leakage paste. The reasons are: (1) The welding quality of the electrode shell is not good, and the welding seam is cracked; (2) The copper tile is in partial contact with the electrode shell, and the electrode shell is burned out; (3) The load was not lowered when the electrode was discharged or the electrode case was burned through due to excessive load due to the electrode sliding down beyond the allowable lowering length. Paste leakage usually occurs soon after the electrode is lowered. At this time, the power should be cut off immediately, and the leaking parts should be found. When the leaking hole is not large and the flow is not much, plug the hole with asbestos rope or the like, press the hole in the copper tile, send power and slowly heat up. If the hole is too large to be blocked, repair the iron sheet of the hole after the paste flow is exhausted, and press it into the copper

 Silico-manganese alloy is a common compound deoxidizer, it is also a reducing agent. High-silicon-manganese-silicon alloy is used for external reduction dephosphorization. CaSi-CaF2-CaO is used as dephosphorization agent. Under the condition of extremely low oxygen potential, the combination of calcium in the dephosphorization agent and phosphorus in the alloy generates Ca3P2, which can make The phosphorus in the alloy is removed, and the alloying elements in the alloy are not lost. The raw materials used in smelting high silicon-manganese silicon alloys are: manganese-rich slag, silica, coke, charcoal, and lime. The basic principle of reductive dephosphorization is to rely on the combination of calcium in the dephosphorizing agent and phosphorus in the alloy to generate Ca3P2 under the condition of extremely low oxygen potential, so that the phosphorus in the alloy can be removed. Adopting process methods: inverted bag method, powder spraying method. Two hot metal ladle A and B are r

 The height of the electrode paste refers to the height from the upper end of the electrode clip to the top of the electrode paste. If the electrode paste is too high, the coarse and fine particles in the electrode paste are prone to stratification, or the electrode cylinder will be swollen due to too much pressure of the paste column. If the electrode paste column is too low, the pressure of the paste column is too small and the filling is poor, and it is difficult to obtain Dense electrodes. The electrode paste is consumed too quickly. The proper height of the electrode paste column is beneficial to improve the quality of electrode firing and reduce consumption. Electrode paste is the conductive electrode of various submerged electric furnaces, and it is an indispensable product in industrial production. We at Rongxin Carbon have read many domestic and foreign materials, but we have not found any materials that specifically discuss the mechanical strength of electrode pastes. In orde

 　　The cause of electrodepaste leakage and its preventive treatment 　　Electrode leakage refers to the liquid electrode paste melted in the electrode, which flows out from the damaged electrode cylinder. There are two locations where the leakage occurs: one is below the bottom ring (copper tile), and the other is above the bottom ring (copper tile). 　　(1) Causes of electrode leakage 　　When the consumption speed of the electrode is greater than the sintering speed, the softening section of the electrode is pressed below the conductive element (copper tile). The electrode current exceeds the safe current that the motor barrel can withstand, and the flow paste or soft break will occur. 　　①The quality of electrode paste is not good 　　The volatile content and softening point of the electrode paste are too high, which causes the three-phase electrode to be in a state of underburning, which cannot meet the requirements of the production process, and causes the paste to leak when