Method for laying bottom of prefabricated block ladle by using small building blocks

Abstract

The invention discloses a method for laying the bottom of a prefabricated block ladle by using small building blocks. The method comprises the following steps of: vertically laying the bottom with small upright prefabricated blocks after an inner lining of the wall of the ladle is laid; reserving a gap of 40 to 50mm between the periphery of the bottom and the wall; and filling the gap with corundum-spinel castable and laying two layers of bricks along an annular joint of the bottom and the wall after the bottom is laid. The method has the advantages that: 1, the upright small prefabricated blocks are fired at high temperature, have high strength and low residual moisture, are suitable for rapid baking and quicken the turnover of the ladle; 2, because the bottom of the ladle is formed by laying a plurality of upright small fabricated blocks, the thermal stress can be uniformly dispersed during use and the bottom of the ladle has high high-temperature volumetric stability; 3, a comprehensive laying process is flexibly used to prolong the comprehensive ladle life of the ladle; 4, the bottom of the ladle is convenient to disassemble and maintain, and partial maintenance or replacement is realized; and 5, the use safety of the ladle is improved and a steel drilling accident of the bottom is prevented.

Description

technical field [0001] The invention relates to a steel ladle used in a steelmaking furnace, in particular to a method for adopting small blocks at the bottom of a prefabricated block ladle. Background technique [0002] For prefabricated block ladles conventionally used in steelmaking furnaces, the bottom of the ladle generally adopts the method of integral pouring, large prefabricated parts or a combination of large prefabricated parts and pouring. The above method has the following outstanding problems: 1. The large prefabricated part has a large weight and a large surface area, and the volume expansion and contraction generated during baking and use are concentrated around the prefabricated block; after repeated use, it is easy to produce large The thermal stress will easily cause the surrounding refractory materials to fall off and fall off. 2. Because the surrounding corundum spinel castable is mixed with water on site, there is a large performance difference with the...

AI Technical Summary

Problems solved by technology

The above method has the following outstanding problems: 1. The large prefabricated part has a large weight and a large surface area, and the volume expansion and contraction generated during baking and use are concentrated around the prefabricated block; after repeated use, it is easy to produce large Thermal stress, easy to cause the surrounding refractory materials to fall off and fall off

2. Because the surrounding corundum spinel castable is mixed with water on site, there is a large performance difference with the prefabricated parts baked at high temperature in the refractory material factory. The expansion coefficient and water content are inconsistent, and it is difficult to achieve the entire bottom performance during the baking process. basically the same

3. A large amount of corundum castables are used around large prefabricated parts, which is easily affected by factors such as on-site temperature, construction conditions, baking, and product storage cycle; 5. The ladle bakes for a long time, which is not conducive to ladle turnover; more importantly, The baking of prefabricated blocks needs to control a reasonable heating curve to ensure that the product does not appear internal cracks during baking; Big threat to production safety

6. It is difficult to dismantle and maintain the steel ladle, and cannot be partially maintained or replaced, and the labor intensity of the workers is high

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