Al2O3-TiO2-CaO based self-flow castable and preparation method thereof

Abstract

The invention relates to Al2O3-TiO2-CaO based self-flow castable and a preparation method thereof. The preparation method is characterized by comprising the following steps: adding aluminum sol which accounts for 4 weight percent to 6 weight percent of titanium-iron slag fine powder into the titanium-iron slag fine powder; granulating and drying; putting the dried titanium-iron slag raw material into a muffle furnace; carrying out heat treatment at 1350 DEG C to 1400 DEG C; cooling and sieving to obtain a heat treatment material A and a heat treatment material B, wherein the granularity of the heat treatment material A is 2mm to 4mm and the granularity of the heat treatment material B is 0.1mm to 1mm; preparing materials according to the ratio of the heat treatment material A to the heat treatment material B to rho-aluminum oxide micro-powder to calcium hexaboride micro-powder to calcium aluminate cement of 1 to (2 to 2.2) to (2.0 to 2.5) to (0.03 to 0.13) to (0.1 to 0.15) and mixing; adding sodium citrate and water into a mixture and stirring to obtain the Al2O3-TiO2-CaO based self-flow castable. The Al2O3-TiO2-CaO based self-flow castable and the preparation method thereof, provided by the invention, have the characteristics of low cost and simple process; the prepared Al2O3-TiO2-CaO based self-flow castable has high density, great cold-state compressive strength and good flowability.

Description

technical field [0001] The invention belongs to the technical field of self-flowing castables. Concretely involving an Al 2 o 3 -TiO 2 -CaO-based self-flowing castable and preparation method thereof. Background technique [0002] Self-flowing castable is a kind of unshaped refractory material composed of refractory raw materials with a certain particle size distribution and high-efficiency flow components. It can eliminate gas through self-weight spreading and significantly improve the flow performance of castables. It is widely used in high-temperature kiln linings. Especially the construction of special-shaped parts. [0003] "A preparation method of self-flowing refractory castable" (CN201510398665.7) patent technology, which discloses pure calcium aluminate cement combined with self-flowing refractory castable with dense corundum, tabular corundum and fused white corundum as main ingredients. Although the self-flowing refractory castable prepared by the technology h...

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Problems solved by technology

[0003] "A preparation method of self-flowing refractory castable" (CN201510398665.7) patent technology, which discloses pure calcium aluminate cement combined with self-flowing refractory castable with dense corundum, tabular corundum and fused white corundum as main ingredients. Although the self-flowing refractory castable prepared by the technology has higher strength and better thermal shock resistance, it has many components, which is not conducive to maintaining the volume stability of the self-flowing castable, and the multi-component preparation process is also more complicated.

[0004] "A refractory self-flowing castable and its preparation method" (CN200710052986.7) patent technology discloses pure calcium aluminate cement combined with refractory self-flowing castable with bauxite and corundum fine powder as main ingredients. Although the preparation process of this patented technology is simple , but the problems existing in the combination of pure calcium aluminate cement are: first, the high temperature performance of refractory self-flowing castables is reduced; second, the hardening speed is faster;