Method for removing salamander from hearth roller of roller-hearth non-oxidation furnace

Abstract

The invention discloses a method for removing salamander from a hearth roller of a roller-hearth non-oxidation furnace. In the method, the furnace temperature of the roller-hearth furnace is reduced to 500 DEG C in a non-blowout state, and the salamander on the hearth roller is removed by mutual friction between the lower surface of a furnace dragging plate and the hearth roller. The method comprises the following specific steps of: making a bottom groove and edges of the dragging plate into a herringbone structure; manufacturing two steel plates for connecting the dragging plate with a chain and ensuring that the chain is positioned on the central line of the dragging plate; putting the dragging plate on a centering platform for centering, connecting the dragging plate with the chain, putting into the furnace, and connecting a hoisting machine with the chain through a steel wire rope for dragging the furnace; and changing the connecting position of the steel wire rope and the chain after dragging for a certain distance to carry out a next-section furnace dragging process until the salamander is completely removed from the hearth roller of the roller-hearth non-oxidation furnace. The method is high-efficiency and convenient; the salamander on the hearth roller is removed under the non-blowout condition; the lower surface quality of the discharged steel plates is ensured; and energy and production cost are saved.

Description

technical field [0001] The invention relates to a method for removing nodules on the bottom rollers of a roller hearth type non-oxidizing furnace. Background technique [0002] At present, the roller hearth non-oxidizing furnace has good sealing performance, no or very little oxide scale in the furnace, so it can obtain excellent surface quality under the premise of ensuring the chemical properties of the steel plate, so this kind of Heat treatment furnaces are favored by various steel mills because they can meet various heat treatment requirements in the steel market. If the sealing of the furnace body is not good or the radiant tube is burned through and the combustion air or unburned gas leaks into the furnace, an oxidizing atmosphere will be generated in the furnace, which will cause nodules on the hearth rolls, which will affect the performance of the hearth rolls. At the same time, indentations will be formed on the lower surface of the steel plate, which will serious...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the many problems in the prior art that there are a large number of hearth rollers, serious nodules, and manual removal is time-consuming and laborious, the purpose of the present invention is to provide a method for removing the bottom of a roller hearth type non-oxidizing furnace without shutting down the furnace. roll nodulation method

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