Before ramming the hot carbon ramming material, the carbon ramming mass must be crushed and heated. The heating temperature is determined according to the uniform mixing temperature of the finished material. If there are no hard lumps in the heated carbon material, it can be processed. Laying and pounding. Use a hot hammer when pounding, and the material temperature should not be lower than 70 degree . When using hot pounding, the hammer head should be heated to dark red, and the wind pressure should not be less than 0.5MPa. The upper and lower material layers should be staggered at a certain angle, and the pounding should be done continuously to prevent delamination. When each joint is made, the surface should be "scraped" or adhesive should be brushed, and then the material should be spread and pounded. When pounding, hammer half or one-third of the hammer back and forth 2-3 times in a straight line.
When cold ramming carbon ramming mass is rammed, due to the product process upgrade, there is no need to heat the material, and there is no need to stir during construction. The material can be poured directly into the use part, and construction is carried out manually or mechanically. The ramming material is also hammered Use a half hammer to pound, but it should be noted that the thickness of each pounding should not exceed 100mm at most until the pounding is dense (reference compression ratio is 40-45%). If the thickness needs to be increased, a second layer can be laid. Each layer is pounded, but before laying, the surface of the upper layer must be roughened to make the upper and lower layers densely combined. The wind pressure during pounding is the same as that of hot pounding, and cannot be less than 0.5Mpa.
Carbon ramming mass are mainly used for the gap between the blast furnace bottom carbon bricks and the furnace bottom sealing plate, or the gap between the hearth carbon bricks and the cooling stave, as well as for leveling above the center line of the furnace bottom water-cooling pipe and cooling stave. Fill every corner and small gap to meet the requirements of no leakage of molten iron and gas.
