Dumping furnace smelting brown aluminum oxide self-baking electrode and production technology thereof

Abstract

The invention relates to the electric furnace metallurgy technology field and especially relates to a dumping furnace smelting brown aluminum oxide self-baking electrode. The electrode is formed through roasting an electrode paste of a 9 to 12% weight percentage of a volatile content, an electrode barrel with an inner diameter of 690 to 710 mm is fixed in a fixing sleeve, a copper tile in the fixing sleeve holds the electrode barrel tightly, and the electrode barrel is fixed to a load-bearing steel platform through a holding system. An electrode paste feeding mechanism is used to add the electrode paste into the electrode barrel for roasting, and a height of an electrode paste column is controlled between 300 and 500 mm. When the electrode paste in the electrode barrel is roasted, coolingwater is injected into the fixing sleeve to form a self-baking electrode with a diameter of 690-710 mm and a volume density of 1.3-1.5 g / cm<3>. Through adopting the technical scheme, the self-bakingelectrode which is not suspended and pasted, and does not generate chipping is manufactured, and the electrode is suitable for smelting of a brown aluminum oxide and is worth promoting.

Description

Technical field [0001] The invention relates to the technical field of electric furnace metallurgy, in particular to a dumping furnace smelting brown corundum self-baking electrode and its production process. Background technique [0002] In the electric furnace smelting, the current output from the transformer passes through the short net, copper tile and other conductive systems, and finally enters the molten pool in the furnace through the electrode, generating arc heat and resistance heat, and then smelting the metal. Electrodes are divided into carbon electrodes, graphite electrodes and self-baking electrodes. Among them, the price of self-baking electrodes is low, and the use of self-baking electrodes in electric smelting furnaces can greatly reduce production costs, so the use is more common. [0003] The current production process of self-baking electrodes is usually as follows: add electrode paste to the electrode cylinder, make the electrode paste pile up in the electrod...

AI Technical Summary

Problems solved by technology

[0006] The invention provides a brown corundum self-baking electrode for smelting brown corundum in a dumping furnace to solve the problems that the quality of the self-baking electrode produced in the prior art is unqualified, and problems such as hanging paste or falling blocks occur during the roasting process.

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