Briquette for iron-smelting blast furnace lining and its preparation method

Abstract

The invention relates to a briquet fireproof material for brasque of blast furnace and the method for preparation. The adopted technique scheme is as following: mixing uniformly electrical calcining anthracite, man-made graphite, metal silicon, carbonized silica fume and titanium dioxide, then adding resin, stirring, forming, drying and burning in an inter carbon ambience. The weight percent of components is: electrical calcining anthracite 50-80%, man-made graphite 10-20%, metal silicon 3-15%, carbonized silica fume 2-8%, titanium dioxide 1-10%, added resin 5-15%. The cost of titanium dioxide used in this invention is relatively cheap, thus the production cost reduces effectively. Titanium carbon nitrogen possesses high melting point, high hardness, perfect chemical stability and excellent resistance to hot metal and loss performance, so resistance to hot metal and loss performance of briquet for brasque of blast furnace is enhanced greatly. The prepared briquet is characterized in that the cost is low, the resistance to hot metal and loss performance is excellent and the thermal conductivity factor is high.

Description

1. Technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a carbon brick refractory material for ironmaking blast furnace lining and a preparation method thereof. 2. Background technology [0002] In order to prolong the service life of the blast furnace, it is essential to improve the quality of refractory materials, especially to prolong the service life of refractory materials for hearth. From the current point of view, the blast furnace hearth mainly adopts carbon bricks with excellent performance. However, when the molten iron contacts the carbon bricks during use, the penetration of molten iron, the dissolution of carbon and the mechanical erosion of the carbon bricks by the molten iron are easy to occur. On the one hand, carbon bricks are susceptible to thermal stress damage and alkali metal damage caused by the thermal expansion of the hot end, the limitation of the cold end by the furnace shell, and ...

AI Technical Summary

Problems solved by technology

my country's Baosteel, Wuhan Iron and Steel, Shougang, Benxi Iron and Steel and other blast furnaces use a large number of foreign high-quality carbon bricks, and the blast furnace conditions have also improved significantly, but these imported products are quite expensive

Although many domestic manufacturers are also developing such carbon bricks, such as "a high-corrosion microporous roasted carbon brick for blast furnace lining" (CN00116085.0) and "microporous self-baked carbon brick for ironmaking blast furnace lining" "Carbon Brick" (CN.00116084.2) patented technology, the introduction of metal titanium into the traditional carbon brick formula improves the corrosion resistance of carbon bricks to a certain extent, but the raw material titanium used is expensive, resulting in increased production costs, which is not conducive to blast furnaces The cost of ironmaking is reduced, and the quality of domestic carbon bricks is generally unstable. Many large-scale blast furnace carbon bricks still rely on imports, which cost a lot of foreign exchange