Fireproof material of furnace bottom of blast furnace hearth and preparation method of fireproof material

Abstract

The invention relates to a fireproof material of a furnace bottom of a blast furnace hearth and a preparation method of the fireproof material. The fireproof material comprises the following ingredients in percentage by mass: 32 to 45 percent of artificial graphite, 20 to 30 percent of corundum, 2 to 10 percent of electrically calcined anthracite, 3 to 10 percent of crystalline flake graphite, 4 to 10 percent of Alpha-Al2O3 micro powder, 6 to 10 percent of single-substance silicon powder, 2 to 4 percent of metal aluminum powder, 0.1 to 0.5 percent of ferrocene and 15 to 20 percent of thermosetting phenol resin. A preparation process of the fireproof material comprises the steps that: except that the thermosetting phenol resin is added in twice, the rest ingredients such as the crystallineflake graphite, the Alpha-Al2O3 micro powder, the single-substance silicon powder, the metal aluminum powder and the ferrocene are uniformly premixed according to the proportion, and the premixed powder is prepared; next, the artificial graphite, the corundum, the electrically calcined anthracite, the premixed powder and the thermosetting phenol resin are mixed and milled uniformly and are formed, and the drying is carried out under the condition of 180 to 220 DEG C; and finally, the fireproof material is fired in buried carbon atmosphere under the condition of 1100 to 1450 DEG C. The preparation process of the fireproof material is simple, and the prepared fireproof material has the characteristics that the molten iron corrosion resistance performance is excellent, the heat conductivity is high, the micropore rate is high, and the intensity is high.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a refractory material for the hearth bottom of a blast furnace and a preparation method thereof. Background technique [0002] The blast furnace is the main equipment for ironmaking. With the progress of the steel industry in various countries in the world, the blast furnace is developing in the direction of large-scale, high-efficiency and long-life. In the ironmaking process of the blast furnace, the working conditions of the hearth bottom are particularly harsh, and its erosion and damage are the result of the joint action of chemistry, fluid dynamics and thermal deformation; and this part cannot be repaired during the production process like other parts of the blast furnace . Therefore, it is generally believed that the refractory material for the hearth bottom is the main link that restricts the longevity of the blast furnace. [0003] At present,...

AI Technical Summary

Problems solved by technology

If these products are combined with ceramic cups to form a ceramic material-carbon material composite structure, it will inevitably increase the complexity of blast furnace masonry construction, and it will not be conducive to the reduction of blast furnace production costs