Desulphurization hot-metal bottle edge steel fibre enhanced fire resistant castable refractory

Abstract

The invention discloses a steel fiber reinforced refractory castable for the edge of a desulfurization hot metal tank, which is made from the following raw materials with the weight percentages: 55-75% of a reclaimed material of a working lining of a desulfurization spray gun refractory material, 10-20% of high-alumina clinker, 5-10% of alumina cement, 3-7% of silica micropowder, 1-3% of reclaimed aluminum silicate fiber, 2-4% of reclaimed refractory steel fiber, 1-3% of Portland cement, 0.1-0.3% of sodium tripolyphosphate and 0.05-0.15% of calcium lignosulphonate. In the invention, the waste refractory working lining material decomposed by the desulfurization spray gun is taken as the resource of the main raw material of the castable, and finally the steel fiber reinforced refractory castable for the edge of the desulfurization hot metal tank with low cost, convenient preparation and simple use and with the reclaimed material of the waste refractory material as the main raw material is obtained, which greatly improves the integrated overall performance and anti-mechanical damage performance of the working lining of the tank edge.

Description

technical field

[0001] The invention relates to a steel fiber-reinforced refractory castable for desulfurized molten iron tanks, in particular to a refractory castable that is integrally cast along the working lining of molten iron tanks for desulfurization pretreatment of molten iron, and belongs to the field of amorphous refractory materials . Background technique

[0002] With the continuous desulfurization of molten iron, slagging of iron on the nozzle, edge and slag line of the desulfurized molten iron tank is gradually serious, resulting in an increase in the weight of the empty tank and a shift of the center of gravity, which seriously affects the production organization and production of iron and steelmaking. Safe; at the same time, due to the hardness of the slag chill and the slag condensation precipitate and the rivet bonding effect of the chill iron penetration, it is very difficult to remove the sticky slag. In actual production, the flame cutting method is gen...