Mullite phosphate and chamotte phosphate refractory ramming material and preparation method thereof

Abstract

A preparation method of a phosphate mullite refractory ramming material comprises the following steps: preparing a base material: preparing a base material: according to the mass percentage, weighing 30-40% of a mullite aggregate with the particle size of 3-5 mm, 15-25% of a mullite aggregate with the particle size of 1-2 mm, 5-10% of a mullite aggregate powder with the particle size of 0.1-1 mm, 15-25% of a mullite powder with the particle size of less than 0.09 mm and 5-15% of a clay powder with the particle size of less than 0.1 mm; then stirring evenly the weighed raw materials; and preparing a phosphoric acid solution with the amount 5-15% of the total amount of the base material; preparing a wet material: adding 40-70% of the total amount of the phosphate solution into the base material, and continuing to stir; ageing the material: sealing the prepared wet material in a sealed container, and allowing air not to be left in the container; and blending the material: again adding 1-5% of CA-50 cement into the wet material, stirring evenly, then adding the remaining phosphoric acid solution, at the same time, sprinkling steel fibers with the amount 1-5% of the total amount of the base material, and stirring for 3-5 minutes.

Description

technical field [0001] The invention relates to the field of preparation of refractory ramming materials for entrained bed pulverized coal gasification equipment, in particular to mullite phosphate used as the inner lining of burners and gas pipelines in entrained bed pulverized coal gasification equipment, and the outer lining of the lower outlet of the equipment body Refractory ramming material, phosphoric acid coke gemstone refractory ramming material and preparation method thereof. Background technique [0002] Refractory materials are basic materials in the field of high-temperature technology, and are widely used in a wide range of applications. The most common application is as structural materials and linings that resist high-temperature effects in various thermal equipment and high-temperature containers. However, according to different operating departments, even in different parts of the same equipment, the working conditions are not the same, so the requirements ...

AI Technical Summary

Problems solved by technology

Different parts of this kind of entrained bed pulverized coal gasification equipment are used and operated at different high temperatures for a long time, which may cause physical, chemical, mechanical and other effects, causing the material to deform, soften, melt, or be eroded, eroded, or cracked and damaged. , not only may make the operation unsustainable, interrupt the service period of the material, affect production, but also affect the quality of the product, so refractory materials with high temperature resistance must be used

Images