Study On Application Of Short Fibers And Rubber Ceramization In Ablative Conveyor Belt

At present,The conveyor belt is the second largest rubber industrial product, mainly used in metallurgy, minerals, coke, chemicals, steel and other materials transportation industry. Currently the material temperature of domestic coal, metallurgy, coke, cement and other industries to be transported is very high, generally up to 400?600?, while the temperature of individual processes exceed 800?.Elevated temperatures will not only cause conveyor belt covering rapid thermal oxygen aging, but also make the conveyor belt cover carbonize and form a loose carbon layer. Carbon layer can barrier heat and protect inner rubber materials. However, the loose carbon layer on the conveyor belt covering apts to fall off when the conveyor belt pass the roller or load materials. Then the inner rubber materials will be ablative, and Its skeletal material also easily be damaged, which will greatly reduces the service life of the conveyor belt. This paper Start with the cover adding a variety of pretreated short fiber and exploration of ceramifying technology, which greatly improve the ablation resistant performance of conveyor belt.Firstly, In the formula of aramid pulp (AP) pretreatment by the method of dry mixing with rapid stirring, Use the highly reactive polyisobutylene resin (PIB) partially or completely replace the paraffin oil as the penetration isolation agent. There are no entanglement phenomena in The prepared AP pre-dispersed masterbatch and it filled EPDM rubber compound.And the dispersion effect of AP fiber in the rubber matrix is very good. The surface modification of AP fiber by adding different variety and amount of coupling agent In the formula of AP pretreatment with the method of dry mixing with rapid stirring was studied. It was found that the addition of coupling agent KH550 modified treatment can significantly improve the interfacial adhesion between AP fiber and rubber matrix in AP pre-dispersed masterbatch filled EPDM composites. The interfacial adhesion of AP fiber and rubber matrix can be improved by 5 kinds of coupling agent modification, and the modification effect of coupling agent KH560 is relatively the best.Scondly, develop a basic ablative resistance fomulary which can achieve the mechanical properties required for the standard.and on its basis, research the effect of Variety and content of short fibers (CBF, AP and CCF) on the ablative properties of covering rubber. Result shows that adding those short fibers will improve the ablative properties of rubber.Under the same content,the effect of AP on Improvement of the ablation resistant properties of rubber is the best. The ablative thickness of rubber can be reduced approximately 40% by adding only 2phrAP. Meanwhile, the synergistic effect of AP and the expansive flame retardant IFR has also been found. Short fibers /rubber composite ablative mechanism are investigated by means of TGA, thermal conductivity testing and SEM.Meanwhile, the effect of short fibers on rubber mechanical properties are investigated.Finally,The ablative resistance conveyor belt cover formulation up to standard are successfully developed.Thirdly, explore the feasibility of the ceramization reaction of the inorganic filler in the crucible by observe their sintering condition at 800?. according to the experimental results design a ceramization basic formulation and on that base investigate the feasibility of rubber ceramization at 800?. Then explore the role of wollastonite, glass powder, IFR, AP and other components in the rubber played in rubber ceramization. Study on the Rubber ceramifying mechanism in the SBR matrix with SEM and XRD.