Flame-proof mending material for foundry ladle and manufacturing method thereof

Abstract

The invention relates to a fire proof patching material used for foundry ladle and a preparation method thereof, the fire proof patching material is a combination, and the contained components and weight percentage occupied in the combination contain: 55 to 90 percent of patching material basal body, 1 to 35 percent of carborundum, 3 to 15 percent of monox micro powder or / and alumina micro powder, 0.5 to 15 percent of calcium aluminate cement, 0.01 to 3 percent of trimeric sodium phosphate or sodium hexametahposphate and 0.001 to 2 percent of sodium cellulose or sodium alginate; the patching material basal body is the combination of one or several corundum, bauxite and flint clay. The preparation method has the following steps: first uniformly mixing the patching material basal body, then adding other components to be uniformly mixed, and finishing goods. The fire proof patching material contains the carborundum, the carborundum has the characteristic of anti-corrosion to low-melting-point materials of fluorite, lime, soda, and the like, makes anti-corrosion performance of the patching material be enhanced, makes the patching material be not easy to be peeled off, and makes the life of the foundry ladle be enhanced. The preparation method of the fire proof patching material is simple and has low cost.

Description

Technical field [0001] The invention relates to a refractory material for repairing, especially a refractory repairing material for a ladle and a preparation method thereof. Background technique [0002] The masonry of the traditional ladle is made of clay bricks, which has a relatively long life. However, due to the desulfurization process, it is necessary to add part of the desulfurization agent and slagging agent to the hot metal, which has a greater impact on the life of the hot metal. The life of the iron ladle is more than 600 times, and the life of the molten iron ladle is only 200 to 300 times. Even if the castable is used to build the tank as a whole, the effect is not ideal. [0003] At present, there are repair materials used to repair molten iron ladle. The main components of the current repair materials are alumina, clay, and a higher content of phosphate or cement as the binder. This repair material is easy to peel off and has anti-erosion performance. Poor, poor du...

AI Technical Summary

Problems solved by technology

[0002] Clay bricks are used for traditional ladle masonry, and the service life is relatively high. However, due to the desulfurization treatment process, some desulfurizers and slag-removing agents need to be added to the molten iron, which has a great impact on the service life of the ladle. In the past, the ladle The service life of the ladle is more than 600 times, and the service life of the ladle is only 200 to 300 times. Even if the whole tank is built with castables, the effect is not ideal

[0003] At present, there are repairing materials used to repair the ladle. The main components of the current repairing materials are bauxite and clay, with a relatively high content of phosphate or cement as the binder. Poor, poor durability

[0004] In addition, the desulfurizer and slagging agent are also the biggest factors affecting the repair material. Both materials contain substances with low melting points such as fluorite, lime or soda, which will greatly wash the furnace lining and severely corrode the repair material.