Anti-seepage high-strength forsterite light heat-insulating brick and preparation method thereof

Abstract

The invention discloses an anti-seepage high-strength forsterite light heat-insulating brick, which comprises the raw materials of forsterite powder, magnesia powder, fused magnesia-alumina spinel powder and a pore-forming material, wherein the particle size d of the magnesia powder and the forsterite powder is less than or equal to 0.044 mm, the particle size d of the fused magnesia-alumina spinel powder is less than or equal to 0.088 mm, the particle size d of the pore-forming material is less than or equal to 0.3 mm, and the mass ratio of the forsterite powder to the magnesia powder to thefused magnesia-alumina spinel powder to the pore-forming material is (30-42): (8-15): (5-10): (40-60). The preparation method comprises the steps of S1, purchasing raw materials and processing the rawmaterials to required granularity, and adding a pore-forming material and a binding agent into a granulator for granulation; S4, selecting magnesia powder, forsterite powder, fused magnesia-alumina spinel powder and the granular pore-forming material, and putting the materials into a mixing machine for full mixing; S5, ageing the materials, and then putting the aged materials into the mixing machine for secondary mixing; and S6, conducting mechanical pressing forming, and then conducting kiln loading and firing.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to an anti-seepage high-strength forsterite lightweight heat-insulating brick and a preparation method thereof. Background technique [0002] For non-ferrous smelting industrial furnaces, high-strength heat-insulating refractory materials with unique functions need to be selected according to different use environments. [0003] For example, for large-scale industrial aluminum electrolytic cells, first of all, the bottom of the cell needs strong insulation, which can reduce heat loss at the bottom of the electrolytic cell, reduce the voltage drop at the bottom of the cell, reduce sedimentation in the cell, control the lifting of the bottom of the cell, and prolong the service life of the cathode lining. It is beneficial to the stability of production and the improvement of current efficiency. The second is the anti-seepage layer at the bottom of the tank, which is part...

AI Technical Summary

Problems solved by technology

This is because in the production process, the deformation of the electrolytic cell shell is inevitable, and there will inevitably be more or less relative displacements in various parts of the cathode lining, resulting in gaps, and the better fluidity of alumina leads to infiltration. , so that the stability of the cathode lining is correspondingly weakened, and the role of the anti-seepage layer is lost.

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