Dry material and method for building ladle lining by using same

Abstract

The invention provides a dry material and a method for building a middle lining by using the same. The dry material consists of the following raw materials in percentage by mass: 35-55 percent of aggregate with the particle size of between 5 millimeters and 1 millimeter, 15-30 percent of aggregate with the particle size of between 0 millimeter and 1 millimeter, 20-35 percent of powder with the particle size of less than or equal to 0.088 millimeters, 3-7 percent of solid phenolic resin and 1-2 percent of additive. In the method, dolomite serving as a rich resource can be fully utilized and calcined into clinker dolomite, and calcium in the clinker dolomite is directly added in the form of calcium oxide. When the calcium oxide with molten steel cleaning function is applied to a tundish lining, the deposition of aluminum oxide in the tundish can be reduced, phosphor removal and sulfur removal are performed, and inclusions in molten steel are reduced. Meanwhile, hydration-proof treatment is performed on the surface of the constructed tundish lining, so that the dry material is effectively isolated from the air, hydration reaction of the clinker dolomite caused by absorption of moisture in the air is avoided, the clinker dolomite is resistant to flushing and erosion in a using process, the clinker dolomite is easily separated from a flame retardant coating after being used.

Description

technical field [0001] The invention relates to a dry-type material, in particular to a dry-type refractory material used as a ladle lining, and belongs to the technical field of refractory materials. Background technique [0002] With the continuous improvement of the continuous casting level of continuous casting production in my country, the working life of the working lining of the continuous casting tundish has been greatly extended, and has developed from the original 5 hours to more than 30 hours today. Materials present even more stringent requirements. The dry material for the tundish is a new scientific and technological achievement, suitable for the working layer of the tundish. It is a new type of unshaped refractory material for the working layer of the tundish after the insulation board of the tundish and the coating material (spray paint) of the tundish. It is the same as The biggest difference between the commonly used wet paint (spray paint) is that it does ...

AI Technical Summary

Problems solved by technology

However, for areas without magnesia resources, magnesia for the production of magnesia dry materials needs to be purchased from afar, not only the cost of raw materials is high, but also the molten steel cannot be purified