The Effect Of Minerals On The Cohesiveness Of Bituminous Rock

As a kind of special fuel,asphalt rock has high volatile,high alkali and other characteristics.Combustion is easy to coke in a reductive atmosphere,it is not conducive to the stability of fluidized bed material.And the ash pollution is strong,so that the boiler heating surface can produce serious ash deposition,which affects the operation of the boiler.It is very important to study the fouling and slagging characteristics of asphaltfuel.This paper uses HSC Chemistry simulation software to explore the effect of different additives on ash composition,according to the different of melting point of different ash components to predict the slagging characteristics of bituminous rock.And then gives the possible suitable additive formulaBased on the analysis of the slagging characteristics of the asphalt rock,the results show that the conventional discriminant index is not suitable for the asphalt rock.This test was carried out in a muffle furnace and fluidized bed.Combined with the theory of sintering in powder metallurgy industry and the field of silicate to research rock asphalt,found that asphalt rock ash the particle size and bulk density can reflect the degree of slagging of rock asphalt in a certain extent.Combined with XRD,XRF detection method for the study of rock asphalt cement,it is found that the change of content of CaSO4 and CaSiO3 has great influence on slagging characteristics of bituminous limestone.According to the experimental results,the simulation conditions were optimized and adjusted,and more appropriate additive groups were selected.Then,they were verified on the fluidized bed boiler,The simulation results agree well with the experimental results of 80%.