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Processing Principle of Ceramic Inner Cylinder Hanging Plate
Release time:
2021-12-27
The preheater wear-resistant ceramic inner cylinder hanging plate is a new product developed by the pre-kiln preheating system of the new dry production line. The product has the characteristics of high temperature resistance, oxidation resistance, corrosion resistance, wear resistance, energy saving and long service life. At present, the inner cylinder of the preheater is still dominated by nickel-chromium heat-resistant alloy steel. Due to the poor corrosion resistance of heat-resistant alloy steel to acid-base atmosphere and not resistant to high temperature wear, the service life of the alloy steel inner cylinder is very short, and the complete service life is about 6 to 10 months. Compared with the inherent defects of high temperature resistance, acid and alkali corrosion resistance and poor wear resistance of alloys, non-metallic ceramic materials have the advantages of high temperature resistance, oxidation resistance, high temperature resistance and high strength.
The preheater wear-resistant ceramic inner cylinder hanging plate is a new product developed by the pre-kiln preheating system of the new dry production line. The product has the characteristics of high temperature resistance, oxidation resistance, corrosion resistance, wear resistance, energy saving and long service life. At present, the inner cylinder of the preheater is still dominated by nickel-chromium heat-resistant alloy steel. Due to the poor corrosion resistance of heat-resistant alloy steel to acid-base atmosphere and not resistant to high temperature wear, the service life of the alloy steel inner cylinder is very short, and the complete service life is about 6 to 10 months. Compared with the inherent defects of high temperature resistance, acid and alkali corrosion resistance and poor wear resistance of alloys, non-metallic ceramic materials have the advantages of high temperature resistance, oxidation resistance, high temperature resistance and high strength, good wear resistance and little influence by acid and alkali atmosphere. Therefore, the use of non-metallic materials instead of nickel-chromium alloy to prepare the inner cylinder has become the consensus of industry researchers and manufacturers.
The metal silicon nitride forms a network structure of silicon nitride, which is tightly bound to the silicon carbide particles to form a dense body. The reaction process is determined according to the DTA curve of silicon powder nitriding, and different nitrogen flow and heating systems are used in different temperature sections. When metal silicon is heated to 1000-1450°C in a nitrogen atmosphere, the nitriding reaction will occur to form a silicon-containing alpha phase and a harmonious beta. By controlling the temperature system α phase and β phase, the phase of silicon nitride in the product can be changed.
Silicon carbide is a synthetic inorganic non-metallic material. Its hardness is second only to diamonds. It has a melting point of 2600 ° C. and a true density of 3.21g/cm3. The thermal conductivity is 8.37 w/m · K; the melting point of silicon nitride is 1900 ° C., the Mohs hardness is 9, the true density is 3.19g/cm3, and the thermal conductivity is 15 W/m · K. Silicon nitride and silicon carbide composite is a new high-performance refractory product developed by combining the properties of both. The chemical properties are stable, the room temperature flexural strength is 4-8 times that of ordinary refractories, 2-3 times that of traditional silicon carbide products (clay-bonded silicon carbide), and the thermal conductivity is 7-8 times that of ordinary refractories, 2 times that of traditional silicon carbide, and half of the thermal expansion coefficient of ordinary refractories. It has good thermal shock resistance, high wear resistance, high temperature creep resistance, acid resistance, alkali resistance, excellent oxidation resistance, resistance to aluminum (AL), lead (PB), tin (SN), zinc (Zn), copper (Cu) and other molten metal corrosion, good electrical insulation and high specific resistance at room temperature.
Features of ceramic inner cylinder hanging plate:
1. High temperature resistance-can be used for a long time within the working range below 1700 ℃;
2. No pollution-no waste gas, waste water discharge;
3. Quenching and heat resistance-in 1100 ℃ cold water repeatedly placed 20 times, no fracture and damage;
4. Good wear resistance -4-5 times that of nickel-chromium steel, 8-10 times that of manganese steel, and 20 times that of carbon steel;
5. Long service life -4-5 years;
6. Light weight-less than 1/2 of the weight of heat-resistant steel;
Energy conservation and environmental protection-no waste gas, waste water pollution, in line with the national energy conservation and emission reduction policy;
8. Increase revenue and reduce expenditure-replacing nickel-chromium steel saves more than 3 billion yuan per year for the cement industry.
Application of ceramic inner cylinder hanging plate: ceramic inner cylinder hanging plate has been applied in many cement enterprises at home and abroad, filling the gap at home and abroad, in line with national industrial policy, advanced technology, mature and reliable technology, ceramic inner cylinder hanging plate adopts advanced production technology and production process.
Key words:
Ceramic inner cylinder hanging plate
Xinghua Xingdong Cast Steel Co., Ltd
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Diduo Industrial Park, Xinghua City, Jiangsu Province
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