Study On The Pyrolysis And Co-carbonization Performance Of Different Rank Of Coal

In this paper, pyrolysis experiments of different ranks of coal was carried outthe effects of different ranks of coal pyrolysis characteristics and gelatinous bodyshape changes, on the basis of the different ranks of coal carbonization experiments,and carbonization of the interfacial bonding strength of the solid product wereanalyzed. The results showed that:(1) With the lower coal volatile, the deeper coal metamorphism level, within thedifferent categories of coal, plastic temperatur of gelatinous body in the coalpyrolysis process range fat coal> fat coal gas> coking coal>1/3coking coal> gascoal, fat coal has maximum colloid ductility temperature range:△t=102~120℃, gascoal has Min colloid plastic temperature range:△t=63~75℃; in the same categoryof coal, the coal Gieseler fluidity increase with the bond index.(2) Studies on solid products quality from coal pyrolysis have shown that dropstrength, structural strength and microscopic strength of fat coal and coking coalcoke is high, reactivity is low, strength after reaction is high, drop strength, structuralstrength and microstructure strength of gas coal coke is poor, reactivity is high,strength after reaction is low, drop strength, structural strength, microstructureintensity, reactivity, and strength after reaction of air fertilizer coal and1/3cokingcoal coke centered.(3) Coal carbonization results show that when the bulk density is constant,interfacial bonding strength and coke optical texture anisotropy tissue contentincreases with the adhesion improvement in blending component content increases;when blending ratio is constant, with the bulk density increased, the bondingstrength of coke and optically anisotropic tissue tissue content increases, interfacialbonding strength of carbonized product from modified Shenhua coal and singlecoking coal is stronger than interfacial bonding strength of carbonized product fromShenhua coal and single coking coal, and the optically anisotropic coke tissuecontent increased significantly.(4) When coal is heated to350~420℃in conditions of absence air, hot-stagemicroscopy results show that the surface of coal particles appear gelatinous body, theamount of colloid mainly related to the degree of coal metamorphism, coal particlesize, heating rate and other conditions can also affect the plastic mass in process ofcoal pyrolysis, middle rank coals during pyrolysis produce more gelatinous body,lower or higher degree of metamorphism during the pyrolysis of coal generate littleor no colloid.