High-purity corundum pouring material containing nano calcium carbonate and preparation method thereof

Abstract

The invention relates to a high pure corundum castable material containing nanometer calcium carbonate and a preparation method thereof. Based on the present commonly used corundum castable material, by adding nanometer calcium carbonate powder as well as adopting efficient dispersant and suitable mixing technology, the invention prepares corundum castable material that contains nanometer calcium carbonate. The invention solves the disadvantage of low strength of the present high pure corundum castable material in low and middle temperature, more particularly, the strength in about 800 DEG C. Furthermore, the variation of the burnt cool strength of the corundum castable material containing nanometer calcium carbonate from 800 DEG C to 1600 DEG C is comparatively small, and the cool strength and hot strength are both higher than those of the corundum castable material containing cement with the same content of CaO. The corundum castable material that contains nanometer calcium carbonate and is prepared by the utility model can be widely applied to such industries fields as iron and steel, nonferrous metals, ceramics and petrochemical etc. The invention can also be applied to fireproof materials products cast, molded and burnt by a porous brick etc., which can greatly reduce the burnt temperature and save energy.

Description

technical field [0001] The invention belongs to the technical field of inorganic non-metallic materials. Specifically relates to a high-purity corundum castable containing nano-calcium carbonate and a preparation method thereof. Background technique [0002] Compared with shaped refractory products, unshaped refractory materials, as a large category of refractory materials, have developed rapidly in all countries in the world because of their advantages in production, labor productivity, construction efficiency, material consumption, and energy saving. In recent years, due to the emergence of high-quality and high-performance raw materials, the introduction of ultrafine powder and high-efficiency dispersion technology, the adoption of new construction methods and the strengthening of basic research, etc., one of the main varieties of monolithic refractories has become one of the main varieties of castables in material, variety, Performance, construction and application have...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to improve the disadvantages of low medium-temperature strength and difficult sintering of current corundum castables by utilizing the advantages of fine particle size of nano-calcium carbonate powder, easy decomposition, and generation of highly active calcium oxide after decomposition, and to prepare a kind of corundum castable with excellent medium-temperature performance. High-purity corundum castable containing nano-calcium carbonate