Ramming material is divided into several materials

Ramming material refers to the construction by ramming (manual or mechanical) method. Ramming material is made by mixing particles, powder, separating agent, admixture with water or other liquids. According to the material, there are high alumina, clay Quality, magnesia, dolomite, zirconium and silicon carbide-carbon refractory ramming materials.

The ramming material is a bulk material made of silicon carbide, graphite, and electric calcined anthracite, mixed with a variety of ultrafine powder additives, and fused cement or composite resin as a separating agent. It is used for filling furnace cooling equipment and masonry. Filling material for body clearance or masonry leveling layer. Ramming material has good chemical stability, erosion resistance, abrasion resistance, spalling resistance, thermal shock resistance, and is widely used in metallurgy, building materials, non-ferrous metal smelting, chemical industry, machinery and other manufacturing industries!

Acidic, neutral and alkaline ramming materials are widely used in coreless intermediate frequency furnaces and cored induction furnaces, as intermediate frequency furnace ramming materials to coagulate gray cast iron, ductile iron, malleable iron, vermicular graphite iron and cast iron alloys , Condensed carbon steel, alloy steel, high manganese steel, tool steel, heat-resistant steel, stainless steel, condensed aluminum and its alloys, condensed copper, brass, cupronickel and bronze and other copper alloys, etc.

According to different blast furnace types and different material design requirements, carbon ramming materials are mainly used in the gap between the carbon bricks at the bottom of the blast furnace and the sealing plate at the bottom of the furnace, between the carbon bricks in the hearth and the cooling wall, as well as the water-cooled tubes at the bottom of the furnace. For the leveling above the center line and the filling of the cooling wall, some parts require the carbon ramming material after the ramming material to have a certain strength and density, filling every corner and small gap, so as to prevent leakage of molten iron and gas. In addition, the thermal conductivity of the carbon ramming material and the functions of the blast furnace hot carbon bricks and cooling stave must be fundamentally different, so as not to affect the life of the blast furnace, so as to maintain the normal production of the blast furnace.

At present, the problem often encountered in the use of carbon ramming materials is that the thermal conductivity of ordinary carbon ramming materials is low, which is not conducive to the rapid cooling of the blast furnace body, thus affecting the service life. Therefore, the update study of carbon ramming materials with high thermal coefficient It has market prospects for its application and application. Whether it is adding admixtures to the carbon ramming material, in-situ reaction at high temperature changes the performance of the material, or changing the structure of some materials from a design point of view, so that the carbon ramming material layer increases in working temperature. When the temperature is high, the thermal conductivity matching the carbon brick and the cooling stave can be achieved to ensure the normal heat conduction without damaging the overall construction structure, so as to meet the requirements of improving the life of the blast furnace.