Metallurgical agglomerate quality management with the account of its impact on the blast-furnace process efficiency

Abstract

The article considers the problems related to the organization of the agglomerate quality management by way of dosing fuel for agglomeration at iron and steel works of the full cycle. The work considers the structures of models for the calculation of the agglomerate quality index values and shows that one of the most significant disturbance factors interfering with the agglomerate quality efficient management is the low authenticity of information about the genotype and chemical composition of the currently used iron-ore mixture. The work gives the possible causes of this situation related to the consistency of the metallurgical plant ore base, peculiarities of materials supply, and their preparation for agglomeration. The work suggests the method for the materials genotype control with the use of X-ray fluorescence analysis data. The X-ray fluorescence analysis data obtained at Magnitogorsk Iron and Steel Works OJSC allowed for the realization of multiparameter disturbances model for the iron-ore mixture parameters considering the accuracy of their measurement and the basicity stabilization system. The disturbance model was used in order to compare various options for the generalization of agglomerate quality values at the management of the consumption of fuel for agglomeration proceeding from the impact of the received agglomerate on the blast-furnace process productivity, stability, and coke consumption.