Titanium-containing calcium aluminate-high alumina bauxite modified refractory material, as well as preparation method and application thereof

Abstract

The invention discloses a titanium-containing calcium aluminate-high alumina bauxite modified refractory material, as well as a preparation method and application thereof, belongs to the field of refractory materials, and adopts the technical scheme that the modified refractory material comprises 25 to 40 wt% of high alumina bauxite, 25 to 40 wt% of titanium-containing calcium aluminate, and 30 to 35 wt% of co-ground powder, and a phenolic resin binding agent which accounts for 3 to 6 wt% of the total mass of the raw materials is additionally added, wherein the co-ground powder is formed by uniformly mixing titanium-containing calcium aluminate fine powder, alpha-Al2O3 micro-powder, graphite powder, silicon carbide fine powder, graphite powder, silicon carbide fine powder, metal aluminum powder and high-temperature asphalt powder; titanium-containing calcium aluminate comprises the following ingredients by ratio: 76.21% of Al2O3, 10.6% of TiO2, 10.16% of CaO, 0.6% of Fe2O3, 1.82% of MgO, and 0.62% of SiO2. According to the invention, titanium-containing calcium aluminate being industrial slag of steelmaking is effectively recycled, so as to greatly reduce the production and manufacture cost; as titanium-containing calcium aluminate is a solid solution of calcium hexaluminate, calcium dialuminate, aluminum titanate, calcium titanate and rutile, the modified refractory material is favorable in thermal shock resistance and heat-insulating property.

Description

technical field [0001] The invention belongs to the field of refractory materials, and in particular relates to a calcium aluminate titanate-high alumina bauxite modified refractory material and a preparation method and application thereof. Background technique [0002] With the development of fast and efficient continuous casting and secondary refining technology and process, the sliding nozzle system has become more and more important in the modern iron and steel smelting process and has become an indispensable part of smelting. It is a control device for molten steel in the casting process of the continuous casting machine. It can precisely adjust the water flow from the ladle to the continuous casting tundish, so that the inflow and outflow of molten steel can be balanced, so that the continuous casting operation is easier to control. The sliding nozzle system has been developed rapidly because of its good controllability and the ability to improve steelmaking production...

AI Technical Summary

Problems solved by technology

[0003] The sliding nozzle system is composed of the driving device, the mechanical part and the refractory material part (ie, the upper and lower sliding plates, the nozzle brick). When the ultimate stress value of the downhole brick is exceeded, the downhole brick will suffer brittle fracture; in addition, during the service period, the downhole brick has been in a high-temperature environment, which makes the downhole brick easy to become loose and porous due to oxidation, and its strength decreases. Scouring and erosion aggravate the damage, which affects its stability and safety

At present, most refractory manufacturers produce sewer bricks mainly made of corundum and aluminum carbon. Among them, corundum-based sewer bricks have good performance, but the cost is too high; the cost of aluminum-carbon sewer bricks is relatively low. Not resistant to corrosion, low service life, and large fluctuations in performance, which affect the safe production of iron and steel enterprises

Images