A kind of repair method of roasting furnace

Abstract

The invention discloses a roaster repairing method. The roaster repairing method specifically comprises the following steps that a high-pressure water gun is used for cleaning the surface of a roaster, a hidden and infirm coating on the surface of the roaster is removed, and a firm coating is reserved; silica sol is sprayed through the high-pressure water gun; a spraying machine is used for spraying a first layer of spraying materials on the pretreated roaster surface; when the first layer of spraying materials are thick, a layer of glass fiber or carbon fiber is sprayed to the first layer ofspraying materials; after the first layer of spraying materials are dried, the spraying machine is used for spraying a second layer of spraying materials; and after the second layer of spraying materials are dried, if fine cracks are generated, the spraying machine is used for spraying the first layer of spraying materials, and slight cracks are filled. Through successful application of the disclosed roaster repairing method, safety risks caused by fire path blockage during roasting are effectively reduced, the labor intensity of personnel is effectively reduced, generation of roasting waste blocks can be reduced as well, the natural gas consumption rate during roasting is reduced, and the effect is obvious in the aspects of energy saving and consumption reducing.

Description

technical field [0001] The invention belongs to the technical field of chemical smelting, and in particular relates to a method for repairing a roasting furnace. Background technique [0002] The fourth-phase roaster of Chinalco Qinghai Branch has been operating at full capacity for five years since it was put into operation for technical renovation and overhaul in 2013. The long-term operation loss of the roasting furnace has caused cracks and deformation of the refractory bricks in the furnace chamber. At present, most furnace chamber material boxes have material leakage, and the maximum cracking distance of the vertical joints of the flue wall reaches 20 mm, resulting in an increase in the air leakage rate of the furnace chamber. , which not only makes the negative pressure leakage of the system serious, which has a certain impact on the temperature rise, but also significantly increases the consumption of natural gas, and greatly increases the loss of carbon block fillin...

AI Technical Summary

Problems solved by technology

The removal of the flue wall is time-consuming, labor-intensive, and poor in integrity, which increases the production cost of the roasted block. After construction, due to the insufficient adhesion of the materials at the interface between the new and the old, after one cycle of operation, due to the high temperature environment in the furnace chamber The refractory brick lining surface and the cement layer will crack, protrude and fall off, which will not only affect the production efficiency of the furnace, but also affect the service life of the furnace, and cannot fundamentally achieve the purpose of repair

The cracks in the furnace chamber are plugged and smoothed, and the efficiency of putting into operation is low. When entering the next cycle, it has to be repaired again. The use time is short, which greatly increases the labor intensity of the workers.