[Introduction] There are two types of carbon ramming materials, hot ramming and cold ramming. Hot pounding requires crushing and heating, and the wind pressure cannot be less than 0.5MPa. Cold ramming does not require heating, and the maximum thickness of each ramming cannot exceed 100mm. Carbon ramming materials are mainly used for gap filling and leveling of blast furnaces to achieve non-leakage requirements. Cold ramming changes the traditional hot ramming process and improves the performance of the lining. RS, a manufacturer of unshaped refractory castables, can provide high-quality carbon ramming materials and advanced construction technology guidance to help you extend the service life of your kiln lining and save production costs.
Construction Technology of Carbon Ramming Material
Carbon ramming material–Refractory Encyclopedia. RS Refractory Castable Manufacturer. There are two types of carbon ramming materials: hot ramming materials and cold ramming materials. Both hot and cold ramming carbon materials are monolithic refractory materials composed of powdery and granular refractory materials and binders. Under normal circumstances, it is recommended to use cold-rammed carbon materials.
Before ramming hot carbon ramming materials, the carbon ramming materials must be crushed and heated. The heating temperature is set evenly according to the mixing temperature of the finished material. There are no hard lumps in the heated carbon material, so it can be laid and pounded. Use a hot hammer when pounding, and the material temperature should not be lower than 70°C. 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. RS Castable Refractory Manufacturer. 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 adopting cold carbon ramming materials, due to the product process upgrade, there is no need to reheat the materials, and there is no need to stir during construction, and the materials can be poured directly into the use site. Subsequently, manual or mechanical methods are used for construction, and the ramming material is also rammed with one hammer and half hammer. RS Castable Refractory Manufacturer. However, it should be noted that the thickness of each pounding should not exceed 100mm until it is dense. The reference compression ratio is 40-45%. If additional thickness is required, a second layer can be laid for pounding. However, before laying, the surface of the upper layer must be roughened to make the upper and lower layers densely bonded. The wind pressure during ramming is the same as that during hot tamping, and cannot be less than 0.5Mpa.
Carbon ramming material is mainly used in the gap between the blast furnace bottom carbon bricks and the furnace bottom sealing plate, or between the hearth carbon bricks and the cooling stave. There is also leveling above the center line of the furnace bottom water-cooling tube and filling of the cooling staves, filling every corner and small gap to meet the requirements of no leakage of molten iron and gas. RS Castable Refractory Manufacturer.
The biggest difference between hot ramming and cold ramming of carbon ramming materials is that cold ramming has changed the old process of traditional hot ramming, the working conditions have been improved, and the performance of the lining has been improved.
RS Castable Refractory Manufacturers
RS Castable Refractory Manufacturer is a powerful manufacturer and seller of unshaped refractory materials. We can provide high-quality refractory lining material products, including various castables, ramming materials, refractory precast shapes, etc. Our products are of reliable quality and our professional construction technical team can customize refractory lining solutions and construction techniques for you. Maximize the service life of high-temperature industrial furnace linings and save production costs for enterprises. Contact us to get a free refractory lining solution and quote.
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