Masonry structure for 18TAOD furnace lining

Abstract

The invention belongs to the technical field of steelmaking converters, in particular to a masonry structure for an 18TAOD furnace lining, which comprises a furnace bottom and a furnace wall; the bottom of the furnace wall is provided with a blower gun; an area spread in a sector shape on the upper part of the blower gun on the furnace wall is an airhole area; the first layer, the second laeyr and the third layer of the airhole area are made of magnesite-chrome bricks; the fourth layer, the fifth layer, the sixth layer, the seventh layer, the eighth layer, the ninth layer and the tenth layer are made of high-purity magnesia-calcium bricks; and the eleventh layer, the twelveth layer, the thirteenth layer, the fourteenth layer, the fifteenth layer, the sixteenth layer, the seventeenth layer, the eighteenth layer and the nineteenth layer and other furnace wall are made of common magnesia-calcium bricks. In the masonry structure, the whole furnace lining is basically uniform through reasonable use of refractory bricks made of different materials in different areas so as to achieve the aims of improving the furnace life and reducing the cost.

Description

technical field [0001] The invention belongs to the technical field of steelmaking converters, in particular to a masonry structure of 18TAOD furnace lining. Background technique [0002] AOD is the abbreviation of Argon Oxygen Decarburization. It adopts normal pressure operation, and there are multiple tuyeres on one side of the furnace body. Oxygen, argon and nitrogen can be delivered to the furnace through the tuyeres. During operation, the type and volume of gas supplied can be adjusted to reduce CO emissions. Partial pressure is an important refining method to achieve the purpose of reducing carbon and maintaining chromium. The AOD furnace mainly includes the furnace shell and the furnace lining. The furnace lining material is required to be able to withstand high temperature and severe temperature fluctuations, chemical erosion of slag and mechanical erosion of molten steel. [0003] In the two-step smelting of stainless steel, the refractory bricks in the working la...

AI Technical Summary

Problems solved by technology

The disadvantage of this scheme is that only the furnace lining in the wind eye area is thickened, without considering the different degrees of erosion in other parts; on the other hand, if the thickness of the furnace lining in the wind eye area is increased to the original 1.5 to 2 times, it will actually cause waste of materials, and reduce the volume of the furnace, so that the molten steel level rises, and accelerate the erosion of the upper furnace lining

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