Iron-runner quick-drying casting material combined with silica sol

Abstract

The invention relates to a fireproof material used in an iron runner of a blast furnace cast house, in particular to an iron-runner quick-drying casting material combined with silica sol, which comprises the following raw materials in percentage by weight: 67 percent of Al2O3, 24.8 percent of SiC, 3 percent of carbon element material, 0.2 percent of dispersant, 2 percent of antioxidant and 3 percent of expanding agent. The raw materials are prepared into bone powder and fine powder which are evenly stirred to obtain a finished product. When the iron-runner quick-drying casting material is used, the silica sol in 6-10 percent of the total casting material is added, stirred and cast in an iron-runner die to form a product, and the product is demoulded and roasted under a large fire for 3-4h to yield iron. The invention has the advantages of short trenching time, burst resistance, high construction quality, short roasting time, long service life of the casting material, lightened labor intensity of workers, castoff and waste utilization, energy saving, emission reduction, no environment pollution and environmental protection.

Description

technical field [0001] The invention relates to a refractory material used in a casting trough of a blast furnace casthouse, that is, a silica sol combined iron trough quick-drying castable. Background technique [0002] In the prior art, various types of blast furnaces need to set tap channels in fixed grooves outside the tapholes, and the performance of the tap channels will directly affect the normal production of the blast furnace. Usually large and medium-sized blast furnaces generally use low-cement castables to form the tapping channel of the working layer; small and medium-sized blast furnaces generally use ramming refractory materials to form the working layer. The traditional small and medium-sized blast furnace tapping troughs all use baking-free AL 2 o 3 -SiC-C (ASC) ramming material, due to the frequent tapping times, the output gradually increases, and the construction time for ramming the iron channel material is short, sometimes only about 20 minutes. The ...

AI Technical Summary

Problems solved by technology

The traditional small and medium-sized blast furnace tapping troughs all use baking-free AL 2 o 3 -SiC-C (ASC) ramming material, due to the frequent tapping times, the output gradually increases, and the construction time for ramming the iron channel material is short, sometimes only about 20 minutes. High intensity, complex production process, high pollution, high consumption, sometimes often shut down due to damage to the iron trough, affecting the normal production of the blast furnace

The iron channel of large blast furnace is castable with low cement binding. Because the cement contains calcium, the melting point of the castable is lowered, and the drying time is long during construction. Even if explosion-proof fiber and metal aluminum powder are added, the iron channel will crack or peel off. Therefore, the service life is reduced