Optimization Model and Pollution Treatment of Sintering Ore Distribution

Sintering process plays an important role in iron and steel smelting process.The subsequent production of blast furnace ironmaking is directly affected by the quality of sinter.Among them,the proportion of raw materials and the advanced degree of sintering process are the two main factors affecting the quality of sinter.Because the control parameters of sintering process are too many and the physical and chemical process is too complex,it is difficult to establish and control the model accurately.Therefore,workers have long relied on experience to set temperature and other factors to engage in production,resulting in the quality of sinter is unstable,the cost is not easy to be controlled.Moreover,the flue gas produced in the sintering process will have different effects on the environment.Through the data analysis of the ore distribution scheme and the results of the physicochemical analysis of sinter in a steel plant,two aspects of the work are completed:one is to establish the optimal model of the cost of the sintering process,and the most suitable temperature for the sintering process.The second is the analysis of harmful components produced in sintering process.

Investigation on the relationship between the fine particle emission and crystallization characteristics of gypsum during wet flue gas desulfurization process

The relationship between the fine particles emitted after desulfurization and gypsum crystals in the desulfurization slurry was investigated,and the crystallization characteristics varying with the operation parameters and compositions of the desulfurization slurry were discussed.The results showed that the fine particles generated during the desulfurization process were closely related to the crystal characteristics in the desulfurization slurry by comparison of their morphology and elements. With the higher proportion of fine crystals in the desulfurization slurry,the number concentration of fine particles after desulfurization was increased and their particle sizes were smaller,indicating that the optimization of gypsum crystallization was beneficial for the reduction of the fine particle emission. The lower p H value and an optimal temperature of the desulfurization slurry were beneficial to restrain the generation of fine crystals in the desulfurization slurry. In addition,the higher concentrations of the Fe3＋ions and the F- ions in the desulfurization slurry both promoted the generation of fine crystals with corresponding change of the morphology and the effect of the Fe3＋ ions was more obvious.With the application of the desulfurization synergist additive,it was beneficial for the inhibition of fine crystals while the thinner crystals were generated.