The alumina ceramic roller is a slender ceramic cylinder, and the two ends of the cylinder wall of the ceramic cylinder are respectively provided with openings, which can be one or two. Through the opening, combined with metal sheets or ceramic sheets, a convenient and reliable combination with accessories such as bearings can be realized, thereby improving transmission efficiency. It is also possible to realize the active rotation of the ceramic roller in the form of gear transmission. Avoid the occurrence of ceramic roller sticking, stalling, and blocking during belt transmission.
Performance Indicators of Ceramic Rollers
- Refractoriness. It refers to the performance of resisting high temperatures without melting and softening when there is no load. High refractoriness indicates that the selected raw materials have good purity and low impurity content. However, the refractoriness does not represent the service temperature of the roller, and the service temperature of the roller is lower than its refractoriness.
- Straightness. Straightness reflects the straightness of the roll, which is an important manifestation of the quality of the roll and rolls with unqualified straightness are likely to cause product deformation.
Application of Ceramic Roller
Ceramic rollers have the advantages of high hardness, good toughness, high density, corrosion resistance, and regular shape. Widely used in ceramics, cement, paint, pigment, chemical industry, medicine, paint, mining, and other industries. Rongsheng manufacturers supply alumina ceramic rods, and high-temperature ceramic roller rods for kilns with 100-4000mm specifications in stock.
Ceramic rollers, high-temperature ceramic rollers, alumina ceramic rollers, and rollers. Ceramic rolls are used in a wide range of fields, whether they are firing wall (floor) bricks, daily ceramics, or kilns for firing glass, magnetic materials, and electronic ceramics, etc., and have achieved good results.
Use of alumina ceramic rods in energy saving of industrial buildings
The application of building materials ceramics and grinding wheel industry takes advantage of its thermal conductivity, heat radiation, and high heat intensity. The manufacture of thin plate kiln furniture can not only reduce the capacity of kiln furniture but also improve the loading capacity and product quality of the kiln. The production cycle is shortened, and it is an ideal indirect material for ceramic glaze baking and sintering.
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The ceramic roller is an important part of the roller kiln, and its use directly affects the quality of the fired product and the efficiency of the kiln itself. In addition, the material of the roller is required to have an anti-oxidation effect under the action of high temperature and combustion products. That is, it has high heat resistance. At the same time, it is also required to keep small deformation under the self-weight of the roller and the load of the product during continuous operation at high temperatures. In order to make the products move in a straight line on the roller table without failure.
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Specifications for the Use of Ceramic Rollers
- Regularly and timely clean up the adhesives and attachments on the surface of the ceramic roller.
- It is better to lower the temperature to 800°C when replacing the ceramic rollers intensively.
- When drawing the rod at high temperature, the ceramic roller rod should be rotated quickly and placed on a special rotating bracket with refractory cotton and kept rotating until the temperature drops below 600 degrees, or covered with thermal insulation cotton to let it cool down slowly.
- After the replaced viscous ceramic roller is polished, its straightness and diameter must be carefully checked for reuse.
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Silicon carbide rollers are generally used in roller kilns with firing temperatures above 1300°C. The common ones are recrystallized silicon carbide rods and reaction-sintered silicon carbide roll rods, and recrystallized silicon carbide rods can be used at 1600°C in an oxidizing atmosphere. But its price is expensive.
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Ceramic roller rods are essential key components of various types of modern high-temperature roller kilns, and they play the role of bearing transmission products in high-temperature firing. Alumina ceramic roller rods are processed with Al2O3 as the main raw material, added with other auxiliary materials, shaped by advanced special equipment, and calcined in a specially designed high-temperature kiln. Then it is precisely processed. The technical performance of the product has been strictly tested and fully meets the requirements of the roller kiln.
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The way to prevent ceramic rollers from being dirty is usually to apply high-temperature alumina slurry on the back of the green body before entering the kiln. (Remember that the brick bottom paste contains too much calcium and iron). And use a tube grinder to grind off the dirt stuck on the roller. Measures such as scraping the edge of the mud and cleaning the dust on the bottom of the brick can further prevent the roller from being dirty.
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Technical Reference for the Use of High-Temperature Ceramic Rollers
- Please keep the rollers rotating under load. Taboo power outages.
- When the hot roller is pulled out from the kiln, if it is necessary to transport the roller from the side of the kiln to another place, please hold the roller with thermal insulation cotton or gloves to keep it vertical during the transportation. Avoid tilting or leveling to prevent the heated roller from bending during handling.
- Do not touch hot rollers with cold metal tools.
There is a certain correlation between the bending deformation of the roll bar and the interruption of the roll bar. The main reasons for the bending deformation are:
- (1) Since the firing cycle of ceramic products is relatively fixed at present. In the case of a certain firing cycle, the longer the kiln, the wider the inner width, the faster the rotation speed of the roller, and the higher the firing temperature, the more prone to high-temperature bending deformation of the roller.
- (2) Due to the influence of the quenching air curtain in the quenching zone of the kiln, the bricks need to be cooled from a high temperature to 600-700°C in a short time. The temperature difference between the top and bottom of the roller in this area is quite large, and the roller is prone to bending.
- (3) It is worth noting that if different batches of products, under the same conditions of use, individual rollers have bending deformation, it should be caused by the quality problems of the rollers themselves.
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The wide-body kiln has the characteristics of a small footprint, low energy consumption, and large output. It conforms to the development direction of energy conservation and environmental protection of the ceramic industry today. Therefore, how to make wide-body kilns meet the production requirements of ceramic rollers has become a common concern of the ceramic industry, and it is of great significance to produce ceramic rolls with excellent performance.
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High-temperature alumina ceramic rollers are made of silicon carbide and alumina materials, which have high strength and high thermal conductivity. High-temperature alumina ceramic rollers maintain no deformation and maintain excellent straightness in the quenching zone of the kiln. The use of high-temperature alumina ceramic tubes ensures the correct direction of the tiles in the quenching zone, does not stack tiles, keeps the tiles in excellent flatness, and optimizes the output of the kiln.
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