Nanometer processing method for working surface of ladle precast block lining brick

Abstract

The invention provides a nanometer processing method for the working surface of a ladle precast block lining brick. The method comprises the following steps: 1) putting a working lining of a ladle precast block in a vacuum apparatus, carrying out vacuum-pumping on the ladle precast block, wherein a degree of vacuum is allowed to be less than 0.08 MPa, and maintaining a pressure for more than 3 hours; 2) under a vacuum condition, adding a nanometer aluminum oxide sol solution, wherein the nanometer aluminum oxide sol solution is allowed to totally immerse the ladle precast block, Al2O3 solid content in the nanometer aluminum oxide sol solution is 10 to 25 wt%, and the pH value of the solution is 3.0 to 6.5; 3) relieving pressure in the vacuum apparatus and allowing an nanometer aluminum oxide sol to enter into the ladle precast block under the action of atmospheric pressure; 4) drying the ladle precast block treated with nanometer aluminum oxide at a low temperature of less than 250 DEG D; and 5) carrying out impurity removal and rubbing on the surface of the dried ladle precast block, which enables a bricklaying surface of the ladle precast block to be smooth so as to facilitate bricklaying of the ladle precast block. The method provided by the invention realizes uniform filling of pores in a refractory product with nanometer sol and overcomes the problem of agglomeration of nanometer powder.

Description

technical field [0001] The invention relates to the processing technology of corundum spinel refractory products, in particular to a nanometer treatment method for the working face of the lining brick of the ladle prefabricated block. Background technique [0002] Nanomaterials have a large specific surface due to their small particle size, so that nanomaterials exhibit singular small size effects, specific surface effects and extraordinary surface activity. [0003] In recent years, although many refractory oxides have been prepared by experimental methods (sol-gel method, vacuum freeze-drying method, etc.), in practice, the remarkable activity of nano-powder particles and the problem of agglomeration have become nano-powder in refractory. The bottleneck of material application restricts the application of nanomaterials in refractories. Although there are studies on the addition of nano-oxides to refractory materials, there are few reports on refractory materials. Domesti...

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Problems solved by technology

Although there are studies on the addition of nano-oxides to refractory materials, there are few reports on refractory materials.

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