Submerged arc furnace drying method

Abstract

The invention discloses a submerged arc furnace drying method. The submerged arc furnace drying method includes the following steps that firstly, a layer of fire-resisting material is flatly laid at the bottom of a submerged arc furnace lining bottom, and a fire-resisting material layer is formed; secondly, three iron roasting cylinders are placed on the fire-resisting material layer, and the three iron roasting cylinders are distributed in a regular triangular shape; thirdly, coke is contained in the roasting cylinders, and the coke particle size ranges from 10 mm to 40 mm; fourthly, a layerof coke is laid in the space between each roasting cylinder and the inner wall of a submerged arc furnace lining, the coke particle size ranges from 10 mm to 40 mm, coke layers are formed, the thickness of the coke layers is smaller than the height of the roasting cylinders, and a layer of slag making material is laid on each coke layer to form a slag making material layer; and fifthly, three electrodes matched with a submerged arc furnace are inserted into the coke in the corresponding three iron roasting cylinders and electrified to form electric loops, and furnace drying is completed afterthe slag making material layers are completely melted.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a submerged arc furnace baking method. Background technique [0002] At present, after the lining of the large-scale submerged arc furnace in the ferroalloy industry is completed, it is necessary to carry out the oven operation to drive out the volatile impurities (such as a small amount of water) in the carbonaceous lining of the submerged arc furnace to ensure the long-term stable operation of the submerged arc furnace lining. . [0003] At present, the commonly used oven methods for submerged arc furnaces are: material oven + coke oven + electric oven or coke oven + electric oven. [0004] The current oven method has the following shortcomings: [0005] 1. The furnace method of material drying + coke drying + electric drying, material drying + coke drying can only increase the temperature in the furnace to 1000-1100 ° C, and the ore raw materials are directly converted into materia...

AI Technical Summary

Problems solved by technology

[0005] 1. The furnace method of material drying + coke drying + electric drying, material drying + coke drying can only increase the temperature in the furnace to 1000-1100 ° C, and the ore raw materials are directly converted into materials when they are electric drying, and the temperature of molten iron is directly raised to 1400 ℃, since the furnace lining has not experienced the temperature range of 1100-1400 ℃, it may even lead to cracking of the furnace lining in severe cases

[0006] 2. When coke drying + electric drying, electric drying will directly produce molten iron, which will erode the carbonaceous furnace lining and cause damage to the furnace lining

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