Magnesium ramming mass for repairing annular shaft kiln and preparation method thereof as well as method for repairing annular shaft kiln

Abstract

The invention relates to the field for repairing a lower sleeve refractory of an annular shaft kiln, in particular to magnesium ramming mass for repairing an annular shaft kiln and a preparation method thereof as well as a method for repairing the annular shaft kiln, which solve the problem for repairing and combining a novel blockwork in the repaired annular shaft kiln and original kiln body. The invention provides the magnesium ramming mass for repairing the annular shaft kiln. The magnesium ramming mass consists of magnesium sand with the granularity of 8mm to 5mm, magnesium sand with the granularity of 5mm to 3mm, magnesium sand with the granularity of 3mm to 1mm, magnesium sand with the granularity of less than 1mm, magnesium sand with the granularity of 0.074mm, aluminum oxide with the granularity of 0.074mm and metal aluminum, so that different repairing blocks can be customized according to the requirements and are applicable to the internal structure of a kiln body; the overall stress of the repaired kiln body is uniform, and the overall stress strength of the kiln body can be satisfied; the magnesium ramming mass is not obviously deformed in a retracting manner along the variation of the temperature, so that the dropping of a repaired part after the temperature is reduced can be avoided, and the repairing efficiency can be guaranteed.

Description

[0001] technical field [0002] The invention relates to the field of repairing refractory materials for the lower sleeve of an annular sleeve kiln, in particular to a magnesium ramming material for repairing an annular sleeve kiln and a preparation method thereof, and a repairing method for an annular sleeve kiln. [0003] Background technique [0004] At present, after the masonry is completed or in the middle and late stages of the kiln age in China, due to the high temperature of the lower arch bridge, the refractory materials have been washed by materials for a long time or the oven curve setting in the kiln stage after the masonry is completed is unreasonable, resulting in the lower inner Part of the refractory material below the arch bridge under the sleeve fell off in a large area, which had a great impact on production, and the kiln had to be stopped for processing. [0005] During the repair process, one of the difficulties is how to choose the filling material fo...

AI Technical Summary

Problems solved by technology

[0004] At present, after the masonry is completed or in the middle and late stages of the kiln age in China, due to the high temperature of the lower arch bridge, the refractory materials have been washed by materials for a long time or the oven curve setting in the kiln stage after the masonry is completed is unreasonable, resulting in the lower inner The part of the refractory material below the arch bridge under the sleeve has a large area of ​​falling off, which has a great impact on production, and the kiln must be stopped for processing

[0005] During the repair process, one of the difficulties is how to choose the filling material for the joint between the lower arch bridge and the new masonry. The reasons are: 1. The joint is irregular and cannot be repaired with shaped materials; The stress strength of the entire masonry body; 3. To ensure that it will not fall off after repair, how to set the repair height

[0006] At present, the refractories below the lower arch bridge of the lower inner sleeve of the sleeve kiln are basically made of magnesia-aluminum spinel, which can adapt to the erosion of alkaline materials (quicklime), but the reburning line has a large change rate. Therefore, in repairing It must be considered at this time. If the repair material is not selected properly, the temperature in the kiln will drop when the kiln is stopped, the refractory material will shrink, and the repair part may fall off, which will not achieve the purpose of repair.

Images