Physical and Chemical Geotechnologies

The paper results from the experimental studies of the process of formation of energy saving material structure on the throat of operating blast furnace, as well as hopper depth on the material surface and the depth interdependence and radial distribution of gas flow as energy carrier. The most significant result of the studies is represented by showing the unknown regularities of the process of burden surface texture on the throat of operating blast furnace by means of unique means of control, as well as substantiation of the energy saving way of radial distribution control of burden and gas flow.

Experimental studies were carried out in the blast furnaces №1, volume 1386 m3, and №3, volume 2002 m³ at Tulachermet SC (Tula, Russia) equipped with bell-type charge equipment using gamma locators for burden surface texture, and blast furnace, volume 1613 m3, at SSAB iron and steel plant (Sweden) using trough charge equipment produced by Paul Wurth S.A. Company (Luxembourg) with a help of unique GEOTAPS system for automated control of geometric and temperature parameters of burden material surface. The GEOTAPS system consisted of two gamma locators for burden surface texture produced by Tulachermet SC and computer system, thermal imager Geomet-800 produced by Swedish enterprise Geometal Trading АВ, and computer system of information processing produced by Swedish enterprise Ulfia Elektronik AB.

As a result of the studies the well-known condition of energy consumption minimization in blast furnace process and gasdynamic mode stabilization was proven, i.e the creation of the proper irregularity of radial distribution of burden and gas flow on blast furnace throat described by more intensive gas flow in small-area central and peripheral zones of throat.

As a result of experimental operation of Geotaps system the practical possibility for approximate estimation of hopper depth on the burden surface according to its infrared radiation was demonstrated. This shows the additional possibilities and prospective for further studies of development of ecologically safe means of current monitoring of process of burden surface formation on the throat of operating blast furnace.

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References

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