- Time:Jul 14, 2023
The masonry method and essentials of blast furnace refractory bricks are the key to ensure that the inner lining structure of blast furnace is firm, compact and able to withstand high temperature environment. The following is a detailed introduction to the general masonry methods and essentials of blast furnace refractory bricks:
一. Preparation of refractory bricks for blast furnace masonry
1. Check the design drawings and specification requirements to understand the masonry scheme and required materials.
2. Clean the blast furnace cavity to ensure that there is no ash, sundries and loose refractory brick residues.
3. Preheat refractory bricks to prevent cracks caused by thermal stress.
二. Blast furnace refractory brick masonry method
1. Bottom cushion layer: first lay a layer of bottom cushion layer with a thickness of about 100mm on the bottom of the blast furnace. The base layer can use alkaline or low refractory refractory materials to reduce the impact of thermal stress on the bottom structure.
2. Main body of masonry: According to the design requirements, refractory bricks are built layer by layer on the bottom cushion. Commonly used masonry methods include full brick masonry, half brick masonry, and cutting masonry. During the entire masonry process, attention should be paid to maintaining the close contact between bricks and taking appropriate filling measures for brick joints to ensure the overall structural stability and fire resistance.
3. Associated parts and detail treatment: According to the design requirements, install connecting bricks, blocks, supporting steel plates and other associated parts, and carry out detailed treatment on the welds to improve the stability and sealing of the structure.
三. blast furnace refractory brick construction essentials
1. Masonry quality: Construction shall be carried out in strict accordance with the design scheme and specification requirements to ensure the accurate position and vertical level of the refractory bricks. Avoid gaps or dislocations between bricks to prevent slag erosion and thermal stress concentration.
2. Masonry sequence: Masonry is carried out in the order from bottom to top and from inside to outside. Ensure that the lower layer of refractory bricks is cured before proceeding with the upper layer of masonry to prevent stress caused by compression.
3. Temperature control: During the masonry process, the temperature and cooling rate of refractory bricks need to be controlled to avoid thermal stress and cracks caused by too fast or too slow cooling.
4. Masonry inspection: Strict quality inspection is carried out during the masonry process, including dimensions, levelness, verticality, brick joint filling, etc. Find problems and fix and adjust in time.
The masonry methods and essentials of blast furnace refractory bricks need to be adjusted and implemented according to specific design requirements and engineering conditions. Reasonable masonry methods and correct operation can ensure the stability and durability of the inner lining of the blast furnace, thereby ensuring the normal operation and long-term use of the blast furnace.
