Novel flash furnace bottom brick local maintenance method

Abstract

The invention discloses a novel flash furnace bottom brick local maintenance method. The method comprises the following steps of S1, determining the maintenance range; S2, conducting sampling; S3, dismantling the furnace bottom; and S4, determining the degree of refractory bricks. After judging that the bottom of a flash furnace can be locally excavated and repaired, the portion between a furnace wall and the furnace bottom is firstly dismantled to form a movable space during furnace bottom dismantling, slag on the upper portion of the furnace bottom is removed through drilling blasting, slag, close to the refractory bricks at the furnace bottom, on the lower portion of the furnace bottom is removed through a drilling extrusion method, and then the refractory bricks at the furnace bottom are locally dismantled. On the basis of the method, the refractory bricks at the bottom of the flash furnace do not need to be completely replaced, and the goal of safe operation of the furnace can be achieved just by local dismantling and rebuilding in a small range. The method overcomes the defects that the bricks and slag at the bottom of the flash furnace are difficult to dismantle, and all renovating wastes time and labor and is high in economic cost.

Description

technical field [0001] The invention relates to the technical field of non-ferrous metal metallurgical furnaces, in particular to a method for partial maintenance of a novel flash furnace bottom brick. Background technique [0002] When non-ferrous metals are smelted, a flash furnace is required. However, during the production process of the flash furnace for many years, when the copper water jacket and the water-cooling element above the furnace wall leak, the water slowly penetrates from above along the furnace wall to the bottom of the furnace. Bricks and furnace bottom refractory bricks are mostly alkaline refractory materials. When alkaline refractory bricks encounter water, they will undergo hydrolysis reaction, which will change the internal structure of the refractory bricks, appear pulverization and deformation, and expand outwards, resulting in steel structures around the furnace bottom. Bulging outwards also increases the risk of copper liquid leakage and affects ...

AI Technical Summary

Problems solved by technology

After the long-term use of the flash furnace is shut down, there is thick slag on the bottom of the furnace, up to 1 meter thick. The slag is rich in metals such as copper and iron, which is difficult to dismantle. It is difficult to replace all the refractory bricks on the bottom of the furnace. Big, long time, high economic cost

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