Simulation of heat losses and temperature of blast furnaces tuyeres

Yuriy Tarasov,Alexandr Radyuk,Sergey Gorbatyuk,S Bratan,S Leonov,S Gorbatyuk,S Roshchupkin

doi:10.1051/matecconf/201712906031

Yuriy Tarasov, Alexandr Radyuk + Show 5 more

Open Access

https://doi.org/10.1051/matecconf/201712906031

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Abstract

The calculation technique of heat losses and temperature, adapted to blast furnaces tuyeres is described. Using a linear excel program the effect of gas-thermal coating and insulation lining on thermal state of the blast tuyere was studied. Problems of the blast tuyeres hardening and reducing heat losses through their surface are relevant, but finding ways of the blast tuyeres hardening and reducing heat losses through their surface by simulation of the thermal state of blast furnaces tuyeres are carried out. Key words: blast tuyere, blast furnace, tuyere nose, air passage, internal nozzle, gas-thermal coating, insulation lining.

Highlights

Blast tuyere is a key constructional element of blast furnace, determining its running efficiency
Blast tuyeres account for 30% of all heat losses in furnance
At the present time the given problems are solved by different ways: applying gas-flame sprayed coatings on an external surface of tuyere and lining-up by firebrick from the direction of air passage [2], applying heat-resisting backfill on an external surface of tuyere [3, 4] and others

Summary

Introduction

Blast tuyere is a key constructional element of blast furnace, determining its running efficiency. RRRRnnnnrrrr, RRRRnnnnnnnn is the radius of external nozzle from the side of furnace against tuyere nose and flange respectively (fig.1), m; hnnnn, hii is the thickness of external nozzle and i- coating material respectively (fig.1), m; λλλλCCCCCCCC, λλλλii is the heat conduction coefficient of cuprum М1 and i-coating material respectively W/(m∙К); m is the allotment of covering materials (layers); ααααvvvv is the coefficient of heat-transfer from tuyere wall to water, W/(m2∙К). 1 ααααvvvv ∙(RRRRgggggggg −hgggg) where ααααggggrrrr is the coefficient of heat-transfer of tuyere nose from gas forge W/(m2∙К); mmmm 1 ααααvvvv∙(RRRRvvvv+hvvvv) where ααααdddd is the coefficient of heat-transfer from hot blow to tuyere wall, W/(m2∙К); mmmm

Results

Conclusion