Optimisation model of fuel distribution in materials bed of iron ore sintering process

Abstract

In this study, the optimisation model of fuel distribution base on numerical simulation was proposed to reduce the fuel consumption of sintering process. The simulation model of sintering process was carried out according to the heat and mass transfer, and the physical and chemical reactions of sintering. Then the heat income and expenditure of solid mixture in different materials unit was analysed via the simulation model. And the fuel proportion was adjusted on the basis of the difference between total heat quantity and heat quantity that the materials unit required to reach setting temperature. This model was validated by sintering pot test, the simulation results of bed temperature at different depth were very close to the detection results. The sintering pot test shows that the sinter yield and quality indices had little change after the optimisation of fuel distribution, while the solid fuel consumption was decreased by 3.83 kg t −1 .

Numerical Simulation on Influence of Coke Oven Gas Injection on Iron Ore Sintering

“…Sub-models, such as gas-solid chemical reaction rate models, gas homogeneous combustion reaction rate models, NO x reduction/formation models, gas-solid heat transfer model, melting and solidification models and sintering bed structure change model were presented in our previous work. 11) The gas-solid reactions include coke combustion, [12][13][14][15][16][17] limestone decomposition, 18,19) dolomite decomposition, 20) hematite reduction and magnetite oxidation. 21) To characterize the NO x behavior, four main NO formation/reduction mechanisms, 22) i.e., the fuel NO originating from coke particles, thermal NO formation, NO reductions by coke particles and CO are considered.…”

Efficient Utilization of Carbon-Bearing Dusts in Composite Agglomeration Process for Iron Ore Sintering

“…Obviously, only Test 4 realized relatively homogeneous thermal distribution, in association with automatic heat accumulation in the lower burden layer because of downward heat conduction in sintering [22]. It would contribute to high-quality sintering with lower TCC [23]. The results indicated that proper segregation of DP-4 was effective for improving indexes with relatively low sintering temperatures.…”

Fuel-Appropriate Distribution of the Material Layer Based on Numerical Model of Sintering with Particle Swarm Optimization Algorithm

“…There is already technical support for fuel refinement utilization in a sintering plant in the form of a jaw crusher. Some scholars have studied the effect of fuel conditions on the thermal state by means of numerical models [9][10][11][12][13]. Won [14] studied the effect of fuel characteristics on the thermal state, Minerals 2023, 13, 511 2 of 14 demonstrating that the better the combustion characteristics, the faster the spread of the burning zone.…”

“…Huang [22] developed a heat balance equation for the sintering process to obtain a reasonable fuel distribution. Some scholars [11] proposed a reasonable fuel proportion for each unit of the material layer based on the maximum temperature. Others suggested a suitable particle size composition of the fuel through experiments.…”