Mammoth converter lining and construction method thereof

Abstract

The invention discloses a mammoth converter lining and a construction method thereof. The mammoth converter lining comprises a converter bottom part, a melting bath joint seam part, a converter body part and a converter cap part, wherein the converter bottom part, the melting bath joint seam part, the converter body part and the converter cap part comprise permanent layers, middle padding layers and working layers; the working layer at the melting bath joint seam part on a left lug shaft side and a right lug shaft side is manufactured from MT-18A marked magnesium carbon bricks; and the MT-18A marked magnesium carbon bricks have same length and are constructed into an arc-shaped transitional surface with a smooth inner side. A wedge brick is embedded into a seal part of the converter cap and a ramming material completely fills the seal part. The method comprises the following steps of: step 1) setting a lining brick construction sequence; step 2) constructing all the bricks according to a preset construction sequence during a construction sequence; step 3) measuring the inclination angle of the upper plane of the lining bricks after one layer is constructed so as to ensure that the inclination angles of all the parts are same; 4) measuring the lining brick levelness after the last layer of the arc-shaped transitional surface part is constructed; and 5) performing full-process monitoring during the construction process, and baking the converter after achieving acceptance.

Description

technical field [0001] The invention relates to the technical field of building a converter lining for steelmaking, in particular to a large-scale converter lining and a building method. Background technique [0002] The invention relates to the lining masonry technology of a converter for steelmaking. Generally, the converter for steelmaking is an alkaline converter. The furnace lining is composed of a permanent layer, an intermediate packing layer and a working layer. The working layer is generally made of magnesia-carbon refractory bricks. According to different parts in the furnace, the converter lining can be divided into furnace bottom part, molten pool joint part, furnace body part and furnace cap part from bottom to top, and can be divided into feeding side, left trunnion side, tapping side and Right trunnion side, combined with figure 2 , Figure 4 , Figure 6 Due to the different erosion, damage mechanism and erosion degree of each part in the smelting process, ...

AI Technical Summary

Problems solved by technology

The invention is suitable for the arc transition radius of the converter with a nominal capacity of more than 150 tons, can meet the requirement that the thickness ratio of the front and rear ends of the arc transition brick is greater than 0.5, and avoids the small arc transition radius of the converter with a nominal capacity of less than 150 tons, which causes the thickness ratio of the front and rear ends to be less than 0.5 will cause the problem that the strength of the back end is too small

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