Algorithm for calculating the mathematical submodel of the chain section of a rotary tubular kiln for sintering nepheline concentrate with limestone in alumina production
Abstract
Algorithm for calculating the mathematical submodel of the chain section of a rotary tubular kiln for sintering nepheline concentrate with limestone in alumina production
Incoming article date: 12.12.2025The paper presents an algorithm for calculating thermal processes in the chain section of rotary tubular kilns used for sintering nepheline concentrate with limestone. The model is based on heat and mass balances and accounts for interactions between the gas flow, the material bed, dust particles, and the refractory lining. The algorithm considers the influence of the geometry and packing density of the chain curtain on heat transfer and is integrated with submodels of axial material movement and dust carryover. The calculation is implemented as an iterative scheme that ensures consistency between gas and material temperatures. The algorithm makes it possible to determine temperature distributions, heat fluxes and losses, as well as to perform parametric optimization of kiln operating conditions and design.
Keywords: rotary tubular kiln, nepheline concentrate, mathematical model, chain section, heat transfer, material movement, dust carryover, algorithm