Combustor refractory lining prefabricated building block for cement kiln, production method and application of combustor refractory lining prefabricated building block

Abstract

The invention relates to a prefabricated building block which comprises a building block 1, an annular lug boss 2 and an annular groove 3, wherein the annular lug boss 2 and the annular groove 3 can be inserted and coincidently connected. A production method of the prefabricated block comprises the following steps of: pouring raw materials in a mould, curing at a 25 DEG C environment temperature and naturally curing for 48 hours after construction, baking in a shuttle kiln by modes of raising the temperature for 5 hours at a temperature raising speed of 25 DEG C/h under an environment of a room temperature 25 DEG C, insulating for 16 hours, and raising the temperature for 10 hours at a temperature raising rate of 25 DEG C/h, and insulating for 6 hours, and then demoulding to obtain the finished block. When the prefabricated building block is use, a high-temperature ceramic fiber blanket is spread on the outer surface of a combustor, and the prefabricated building block is sleeved on the combustor, the annular lug boss of the later building block is inserted into the annular groove of the former building block, and a circular seam is filled by using fire clay, and so on, a refractory lining wrapped outside the combustor is made. The prefabricated building block has the advantages of convenience and rapidness in construction, convenience for disassembly and good use effect during use.

Description

Technical field [0001] The invention belongs to the application field of refractory materials, and is a refractory building block used in a specific part of the cement industry, especially a refractory lining body for a burner. Background technique [0002] The burner is the main heat source of the cement rotary kiln. Its head has a length of 1.5m to extend into the kiln. It has to bear the heat from the flame and clinker, and it is also attacked by the dust carried by the secondary air fan. Therefore, Its refractory lining often peels off due to high heat and dust-laden airflow, and its lifespan is generally 3-6 months, which does not match the life cycle of the cement rotary kiln. The independent shutdown of the kiln for maintenance will bring greater economic losses to cement enterprises . [0003] At present, the refractory lining of the cement kiln burner is cast on-site with refractory castables. The process includes welding anchors, supporting molds, pouring, curing,...

AI Technical Summary

Problems solved by technology

The refractory castable with excellent refractory performance is selected to provide the superior refractory performance of the prefabricated block of the lining body, and the combination of materials, prefabricated products and construction technology solves the problem of short service life of the refractory lining of the burner. The application of the present invention is simple and fast in construction and good in use effect

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