Title

A NEW DESIGN OF FURNACE FOR INTRODUCTION OF CURTAIN FLAME IGNITION SYSTEM FOR SINTER IGNITION IN SINTER PLANT

A NEW DESIGN OF FURNACE FOR INTRODUCTION OF CURTAIN FLAME IGNITION SYSTEM FOR SINTER IGNITION IN SINTER PLANT

Authorship

A.K.Bhattacharya, ; Chintaiah, P.; T.S.Reddy, ; P.K.Tripathy, ; L.Tiwari, ; Chakraborty, D.P.; J.Singh,

A.K.Bhattacharya,

I am this author

Chintaiah, P.

I am this author

T.S.Reddy,

I am this author

P.K.Tripathy,

I am this author

L.Tiwari,

I am this author

Chakraborty, D.P.

I am this author

J.Singh,

I am this author

DOI

10.5151/2594-357x-0131

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Abstract

In the sintering process initial ignition of sinter bed plays crucial role and it is achieved with the help of number of conventional side burners. Overall size of the ignition hood becomes large if conventional burners are used. This system has several disadvantages like non uniform temperature distribution across the width of the sinter bed, loss of significant heat due to radiation from the ignition hood, etc. In these type of furnaces generally mixed gases are used for ignition and fuel consumption is very high. Average fuel consumption in this type of firing comes in the range of 0.025-0.045 G Cal per ton of sinter. In the newly developed curtain flame ignition system, furnace size has been drastically reduced and refractory consumption has come down to one tenth of the earlier design. Flame from a series of slit burners, across the width of the furnace, directly impinged on the sinter bed passing through the sinter hood. Sinter hood is made up of a number of modules of prefabricated preheated refractory structure and slit burners are sandwiched in between them. This furnace hood is supported by two front and back end refractory beams which act as curtain to the flame. With the adoption of this new system the fuel consumption has come down to 0.027 G Cal per ton of sinter apart from improvement in sinter quality. Refractory cost has also come down drastically. In this paper the developed system of refractory lining for sinter hood along with the benefits achieved after adopting the developed technology has been discussed and highlighted.

In the sintering process initial ignition of sinter bed plays crucial role and it is achieved with the help of number of conventional side burners. Overall size of the ignition hood becomes large if conventional burners are used. This system has several disadvantages like non uniform temperature distribution across the width of the sinter bed, loss of significant heat due to radiation from the ignition hood, etc. In these type of furnaces generally mixed gases are used for ignition and fuel consumption is very high. Average fuel consumption in this type of firing comes in the range of 0.025-0.045 G Cal per ton of sinter. In the newly developed curtain flame ignition system, furnace size has been drastically reduced and refractory consumption has come down to one tenth of the earlier design. Flame from a series of slit burners, across the width of the furnace, directly impinged on the sinter bed passing through the sinter hood. Sinter hood is made up of a number of modules of prefabricated preheated refractory structure and slit burners are sandwiched in between them. This furnace hood is supported by two front and back end refractory beams which act as curtain to the flame. With the adoption of this new system the fuel consumption has come down to 0.027 G Cal per ton of sinter apart from improvement in sinter quality. Refractory cost has also come down drastically. In this paper the developed system of refractory lining for sinter hood along with the benefits achieved after adopting the developed technology has been discussed and highlighted.

Keywords

Sinter; Curtain; Energy; Refractory.

Sinter; Curtain; Energy; Refractory.