Graphite seal block Guangxi graphite sealing block

Henan Henan graphite seal block quote prices graphite graphite sealing block can be used as sealing, lubricating materials, and is widely used in many of the cement kiln. Its main purpose is twofold: First, for the kiln, kiln seal, the second is used to lubricate the idler wheel belt. Both graphite products are used in a block structure. Now as to the typical form of the seal structure and lubricating graphite blocks in the rotary kiln is a brief, but to talk about it several deficiencies in the application, in order to attract attention. A sealed thermal equipment cement rotary kiln is operated under negative pressure, good or bad at both ends sealed state is directly related to the cement clinker production, quality and energy level. Strengthen and improve the kiln, kiln sealing work, is an important way of rotary kiln cement plant increase energy efficiency. However, due to poor working conditions at both ends of the rotary kiln, not only high temperature, and the presence of rotation and ran simultaneously, thus sealing cement kiln work, both focusing is difficult. Graphite block has a certain high temperature performance and good self-lubricating properties, can meet the requirements of sealed rotary kiln, rotary kiln and thus in the domestic, graphite blocks in the early 1950s, it was used as a sealing material, the current application still more extensive. 1, kiln kiln sealed graphite block sealing device, usually in the form of a ring to friction. Surrounded by a plurality of graphite blocks cold sets composed of upper and lower halves, respectively, with two graphite blocks rope is wound, by weight pressurized, so that it fit tightly to achieve cold sealing sleeve. In the role of the platen, set gray graphite block abuts the front wall of the cavity, there is a fixed set of gray in the front wall of the cavity wedge between the guiding role played every two graphite blocks. Although the graphite block is running constantly being rotated with cold kiln liner wear, but by rope hammer action, to ensure tight hoop graphite block is always cold sets. In order to improve the working conditions of graphite blocks, in addition to the cold blast cooling jacket to control the internal temperature of the outer surface, usually in gray set inside a cavity additional labyrinth seals, not only blocking the windshield gray, but also play an insulated effect, the life of graphite blocks will also be significantly extended. 2, kiln kiln sealed graphite block sealing device uses the same ring to form friction. In an accompanying rotating kiln equipped with a lap back on the hopper graphite blocks, joints every two graphite blocks are also provided with guide wedge, outside of its end plate fixed to ensure graphite blocks fit in back of the front wall of the hopper on. After the pressure spring has one end connected to the guide wedge, and the other end connected to the press frame, by pressing frame the action of the spring tension in each of the cylindrical graphite block, it is fastened to the sealing sleeve, and ensure that it wear can automatically follow up in order to achieve sealing. The main difference between the kiln and kiln sealed graphite block, graphite block is used in the former is relatively static, while the latter is used graphite block is rotated with the kiln. This also determines the pressure difference between the two methods. Kiln graphite block sealing, but also take the necessary measures to reduce the operating temperature of graphite blocks, to extend its life, that is, the inner surface of the sealing sleeve insulation castable pouring minimize the surface temperature of the sleeve. As long as proper measures are generally able to control the temperature within 280 ℃. Second, lubricating kiln body is supported by the tire on the wheel bracket operation, contact stress between the tire and wheel care, often relatively large. Under normal circumstances, the maximum contact stress> 300MPa. In order to reduce wear and extend tire roller and the life, usually between two lubrication measures taken. Because the idler wheel with the surface temperature is higher, poor working conditions, general lubricants are difficult to adapt to, and graphite blocks are more applicable. Graphite blocks in the rotary kiln lubrication, near the outside of the idler fixed a rectangular frame, rectangle opening slightly larger than the cross-sectional dimensions of graphite blocks, so inserted therein graphite block can control them. By weight graphite block, keeping in contact with roller, so that the idler surface layer graphite lubricant film, to protect the wheel and tire care purposes. Each group usually Roller can use a graphite, its length equal to or slightly greater than the width of the idler, a thickness of about 4-5cm. Third, a graphite block to be perfect, wear several aspects of graphite blocks, especially under high temperature wear resistance: kiln, kiln seals in normal circumstances, the temperature at 200 ℃ -300 ℃; but Under abnormal circumstances, may exceed 400 ℃. Temperature is a major speed graphite block wear external factors, while controlling the temperature is often also more difficult. Therefore, improving the internal temperature graphite blocks under wear, is an important means to extend its useful life. Usually daily wear graphite block height 1-2mm, such as to extend its service life is reduced to 0.5-1mm doubled. 2, graphite block strength and toughness: graphite block is used to seal its normal failure modes should be worn. But many graphite blocks without wear, because the occurrence of broken and discarded. Some occur in the handling process, and some of them appear in use. The reason is that its strength is not enough, and too brittle due. The possibility of taking the graphite material synthesis process some new technology or new binder, which is to improve the mechanical properties of the key. Seal for rotary kiln, raising the graphite block at 400 ℃ high temperature mechanical properties, is particularly important. 3, graphite block dimensions: increased cross-sectional dimensions of graphite blocks, help to improve their strength; increased height, extend their life cycle. Graphite block is used to seal the terms appropriate to increase the width of the ring to reduce the number of required graphite blocks circle seams also been reduced accordingly, help to strengthen the sealing effect. Large kiln roller width of about 1m, its lubricating graphite blocks required must also have the same length. 4, graphite block varieties: the past, multi-use waste electrode graphite blocks cutting made only limited by the size of the raw materials, and a single species. Whether it is used for sealing or lubrication, are used instead of the electrode material, now appears to be inappropriate. Manufacturers such as to produce different graphite blocks were sealed and lubricated for the kiln, to better meet the requirements. Graphite seals are resistant to corrosion, oxidation resistance, and low resistance characteristics of graphite seals for many years in the petrochemical, oil and other large state-owned enterprises have been widely used in domestic products belong among the best in the series. Quality is better than foreign products. Is a modern and efficient mechanical indispensable, important parts, depending on the process conditions and pay friction material can be used with different materials and different materials soaked with a variety of carbon - graphite seal ring, graphite packing ring, the blade graphite bearings, bushings and washers. It is an ideal and has been successfully used in low temperature, high temperature, vacuum pressure, the various revolutions and corrosive, flammable, explosive, toxic media, in dry grinding, grinding and semi liquid conditions, the use of components and materials, so it has been widely used in machinery, petroleum, chemicals, fertilizers, synthetic rubber, instrumentation, hydraulic rotating equipment and other industrial sectors. Cement rotary seals, lubrication graphite blocks, graphite raw material quality requirements, refer to "carbon graphite wear-resistant material" implementation. As for the specifications of the graphite blocks, there is no standard to follow. I Φ3.2m sealed with cement kiln specifications graphite block is 350 * 250 * 40mm; lubricated with graphite block size is 650 * 200 * 40mm. Seal with graphite blocks, hoping to make get larger, and prone to breaking. Gongyi City, Henan Ruifeng graphite graphite sealing products company ___ Henan graphite block sealing block price quote