Mathematical Modeling for Side-Blow Combustion Region in Iron Bath Reactor with H_2-C Mixture Reduction

摘要

H_2-C mixture reduction reflexes the idea using hydrogen as main reductor and carbon as main heat source in iron bath smelt reduction reactors on purpose to cut down total energy consumption and CO_2 emission. To explore the kinetic behavior of the reactor, the author applied modeling method for its separating regions and complex integration. An important part among those was side-blow region where the temperature field and substance concentration field coupled in multiple-phase mixture of solid, liquid and gas. Integrating coupled models included shrinking core of granulated carbon, carbon-oxygen combustion and heat absorption of slag drops etc. Besides inlet flux of injecting oxygen and carbon, the other boundary and initial conditions were given to describe energy exchanges in boundaries between the region and other reaction regions. After dispersion treatment with Control-Volume-Method, the model was programmed as software for digital simulation of combustion procedure in side-blow region. The work of this paper provided the basis for overall kinetics model of iron bath reactor with H_2-C mixture reduction.