There are usually one or more clinker scales in cement batching scales, the temperature of which is greater than 150°C, and some even exceed 200°C. Although many cement companies have bought high-temperature resistant tapes, they often have short service life and poor results. Many cement companies cannot support the 60-day service life of high-temperature belts. Our country has special regulations for high temperature resistant conveyor tape. According to the "GB/T20021-2005" standard, the heat resistance of heat resistant tape is divided into 4 grades, namely: T1- T4, T1 heat resistance 100℃, T2 heat resistance 125℃, T3 heat-resistant 150℃, T4 heat-resistant 175℃. Usually the heat-resistant T3 grade has a warranty period of 180 days, and the T4 grade has a 90-day warranty. At present, the high temperature resistant ring tape generally used in the market is T4 grade. In order to prolong the service life of high temperature tape, tape manufacturers often thicken the working surface adhesive layer and thicken the canvas core layer to resist high temperature with thickness. Therefore, the thickness of the high-temperature ring-shaped tape generally reaches 12-13 mm. The high-temperature-resistant endless tape is made of super thick thickness. Although the existing old-structured endless tape has a certain effect, the use of old materials and the old construction method can never change the short life of the high-temperature tape. Because high temperature accelerates the aging of the rubber skin and also accelerates the aging of the canvas core layer, the increase in thickness has little effect on extending the service life of the tape. The main disadvantages of the existing high temperature resistant annular tape are
1. Adhesive tape is too thick, uninterrupted long-term use causes high temperature to be introduced into the glue layer and canvas layer, the thicker the object, the more heat it absorbs, the heat storage is large, and the center heat dissipation slows down. Because of the slow heat dissipation, rubber accelerates "thermal aging" in the long-term high temperature. It can be seen that with the aging of the rubber skin, the core layer of the canvas also ages.
2. From the perspective of energy saving and consumption reduction, the thick and heavy tape consumes more electricity. Take a high-temperature tape with a width of 1000mm, a length of 7000mm, and a thickness of 12mm as an example. According to the rubber 1mm thick and 1 square 1.3 kg, the weight of the tape is 109.2 kg, and the empty load per minute is 426 kg; suppose this tape is only With a thickness of 6 mm, the weight of the belt is only about 54.6 kg. As a result, the unloaded weight can be reduced by 218 kg per minute, and 314 tons can be reduced 24 hours a day, and the unloaded weight can be reduced by about 100,000 tons in one year.
To prolong the service life of the high-temperature-resistant annular tape, the first step is to solve the type of rubber that can withstand high-temperature resistance, and at the same time use a core layer skeleton with particularly strong high-temperature resistance. Fast thermal conductivity material is used in the matching materials to prevent the tape from accelerating its aging due to high temperature storage.
The "wear-resistant and high-temperature resistant thin belt" (invention patent number: ZL201210248811.4) invented by our company is a product designed for the requirements of cement companies that require high-temperature resistant annular tape. Its characteristics and advantages are:
1. Adopt the glue type "EPDM glue" that can be used for a long time under the constant temperature condition of 120℃ and high temperature, introduce foreign advanced proportioning technology, and apply the material to achieve high temperature and super wear resistance.
2. Use steel wire rope that meets the requirements of sufficient strength of the ring tape as the tension layer, combined with aramid and other fibers that can withstand 560℃ as the supplementary skeleton of the tension layer. Multi-layer canvas structure that changes the traditional manufacturing method.
3. With a thin thickness of 6-7 mm, the thin tape has a fast heat dissipation rate, which can greatly reduce the thermal aging of the inner molecules of the rubber.
4. Special materials such as steel wire rope and aramid are used as the tension layer to prevent the sudden increase in material temperature under abnormal conditions in cement companies, and the tension layer is coked and loses the value of the tape.
5. The weight of the thin high-temperature resistant ring tape is half that of the conventional high temperature resistant tape, which is not only convenient for transportation and installation, but also greatly saves the energy consumption of the equipment. It is calculated that a high temperature ring tape of 7 square meters can reduce the empty weight by about 1 year. 100,000 tons.
In summary, the high-temperature ring tape is thinner. This patented technology is a brand-new revolution in the structure of the ring tape tension layer. This new product of "energy saving and consumption reduction" has been well received by users.
Hangzhou Heli Rubber Products Co., Ltd. www.hl-xj.com
Hangzhou Lijiu Conveyor Belt Co., Ltd. www.lj-ssjd.com
Original author: Hangzhou efforts Rubber Products Co., Ltd.
