Construction method of integrated full-pouring refractory material structure applied to blast furnace lining

Abstract

The invention relates to the technical field of blast furnace building construction processes, in particular to a construction method of an integrated full-pouring refractory material structure applied to a blast furnace lining. The construction method comprises the following steps that pouring construction is carried out on a furnace bottom area by using furnace bottom castable to replace a traditional ceramic cup mat, furnace cylinder castable is used for a furnace cylinder part by replacing traditional ceramic cup bricks, a filling layer between a traditional ceramic cup and carbon bricks is eliminated, a thermal resistance layer is reduced, and the overall heat transfer efficiency of the poured furnace cylinder is guaranteed. A tuyere area adopts tuyere castable to replace traditionaltuyere combined bricks, a tapping hole area adopts tapping hole castable to replace traditional tapping hole high-aluminum bricks, and furnace belly and furnace waist parts and a furnace body adopt steel fiber silicon carbide high strength pre-hanging slag skin castable and steel fiber high alumina high toughness pre-hanging slag leather castable respectively for pouring construction. According tothe method, a sealed and stable lining structure is formed in the blast furnace in a pouring mode, and the service life of the blast furnace can be prolonged. Compared with a traditional mode, the machining process is greatly simplified, and the construction period is shortened.

Description

technical field [0001] The invention relates to the technical field of blast furnace construction technology, in particular to a construction method for an integrated fully cast refractory structure applied to the inner lining of a blast furnace. Background technique [0002] In the past, our domestic large blast furnaces all adopted the hearth structure mode of ceramic cup + carbon brick. Although this structure has a relatively good effect in domestic application, there are still many domestic blast furnaces whose service life has not reached the designed service life. Experts are working on longevity applications of blast furnaces. The use of traditional ceramic cup combination bricks has the following disadvantages: [0003] A. The traditional blast furnace hearth ceramic cup has a long production cycle (generally about 3-4 months). The production process needs to go through many complicated processes such as batching, molding, drying, firing, selecting, and grinding, ...

AI Technical Summary

Problems solved by technology

[0004] The original staves of domestic large blast furnaces usually adopt hot surface bricklaying, brick inlay and wet spraying methods. These three processing methods all have shortcomings: A. Bricklaying structure: because the refractory bricks built by masonry are layer by layer from the lower refractory bricks Support, lack of self-stability, once the lower refractory brick is eroded, the upper refractory brick will be difficult to gain a foothold, as a result, the hot surface of the stave is exposed in the furnace

C. Wet injection structure: Since the construction process uses high-pressure pumping to spray on the cooling wall surface, there is dust pollution during construction, and a certain amount of rebound material falls into the bottom of the furnace during construction, resulting in waste of materials and high requirements for construction technology If the combination of materials in a certain area is not complete or the injection pressure is low, it cannot form a tight bond with the hot surface of the cooling wall. After the furnace is turned on, it is easy to fall off due to the erosion of materials and airflow, and cannot effectively protect it.

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