Galina Yu. Vitkina

The Characteristic of Ores and Concentrates of the Open Society "EVRAZ KGOK"

The results of preliminary experimental researches of possibility of metallurgical processing of ores of Actually Kachkanarsky deposit are presented in the work.

Methodical Basis of Investigation of Influence of the Iron Ore Materials and Coke Metallurgical Characteristics on the Blast Furnace Smelting Efficiency

A new method of the estimation of influence of the iron ore materials and coke metallurgical properties on the efficiency of blast furnace smelting is developed. It consists in the following stages: the laboratory tests with the definition of the iron ore materials and coke metallurgical properties; the analytical study of the influence of these characteristics on the efficiency of blast furnace smelting using by mathematical models; the experimental industrial and industrial tests. The developed methodological basis allows to obtain improved criteria for evaluating the metallurgical characteristics of the raw materials and to explain the mechanism of their effect on the reaction of the direct and indirect recovery in the blast furnace. Therefore it allows to formulate recommendations to improve the blast furnace smelting technology.

New Monitoring System of the Refractory Lining Wear in the Blast Furnace Hearth

The monitoring system of the firebrick lining state of the blast furnace devil is offered. The mathematical description, algorithm and program of calculation the temperature fields in any vertical and horizontal cross-section of the devil lining are developed with use of the indications of the temperature sensing transducer (to 1000) in the oven lining. The systems of gathering, processing and information transfer from the temperature transmitters to a program database are used. This monitoring system is established on five blast furnaces of metallurgical plants of China.

The Thermophysical Bases of Monitoring of the Fireproof Lining Wear in the Blast Furnace Hearth

This paper presents a two-dimensional description of the temperature field in refractory lining of the hearth in the blast furnace. The mathematical model is based on Fourier differential heat conduction equation. Different solutions of this equation are presented and the optimal quantity and location of thermosensors in the hearth is proposed. This paper also presents a methodology to obtain the heat conductivity of refractory materials.

The Determination of Thermocouples Optimum Number in the Blast Furnace Hearth for Control of its Condition

The algorithm of a sensors arrangement in the blast furnace laying taking into account classification and the indications analysis of doubtful temperature sensors in 5 blast furnaces of the Peoples Republic of China is developed. When developing algorithm the adaptation of an arrangement of temperature-sensitive elements in a laying to the developed mathematical model of a laying heat [1, 2] for the purpose of minimization of their quantity and increase in reliability of indications at the expense of increase of density of their arrangement in the most dangerous zones of a laying and an exception of superfluous sensors in the zones being characterized by low degree of wear. The scheme of an arrangement of thermocouples for the blast furnace in volume of 5100 m3 is offered.

The Reducibility of the Iron Ore Materials as Instrument of the Coke Consumption Decrease in the Blast Furnace Smelting

The technique of defining the minimum coke consumption in blast furnace smelting allows for the calculation of the reserve of coke economy on the basis of thermodynamic principles. In this reserve the constitutive role belongs to the reducibility of the iron ore materials (the agglomerate and pellets). In the present paper, the questions of the reduction kinetics of the iron ore materials and diffusion processes at reduction of iron from its oxides are considered. It is shown that the reducibility of the iron ore materials is the basic reserve of economy the scarce and expensive coke in the blast furnace smelting.