SU475397A1

SU475397A1 - Method of heating steelmaking furnace

Info

Publication number: SU475397A1
Application number: SU1982671A
Authority: SU
Inventors: Виктор Николаевич Дорофеев; Леонид Александрович Бровкин; Нина Алексеевна Кудрявая; Константин Дмитриевич Мокрушин
Priority date: 1974-01-02
Filing date: 1974-01-02
Publication date: 1975-06-30

Description

1one

Изобретение отпоситс к черной металлургии , а именно к отоплению сталеплавильных печей, например мартеновских.The invention refers to ferrous metallurgy, in particular to the heating of steel-smelting furnaces, such as open-hearth furnaces.

По известному способу отоплени сталеплавильной печи, включающему подачу топлива с торца вапны в виде двух товливно-кислородных факелов под углом к горизонтальной плоскости со стороны передней и задней стенок печи, происходит неравномерный нагрев шихты.According to a known method of heating a steel-smelting furnace, which turns on the supply of fuel from the end of a vapna in the form of two flaring-oxygen torches at an angle to the horizontal plane from the front and rear walls of the furnace, the mixture is unevenly heated.

Целью изобретени вл етс улучшение равномерности нагрева шихты в ванне.The aim of the invention is to improve the uniformity of heating the mixture in the bath.

Это достигаетс тем, что корни факелов удал ют друг от друга на рассто ние 0,3- 0,8 ширины ванны, причем факел со стороны передней стенки печи направл ют под углом 15-30°, а факел со стороны задней стопки печи-параллельно .или под углом до 50° к продольной оси печи. Кроме того, угол наклона факела со стороны передней стенки к горизонтали на 10-25° больше угла наклона факела со стороны задней стенки печи. Расход топлива в факел со стороны передней стенки может быть в 1,2-2,7 раза больше, чем в факел со стороны задней стенки, угол наклона факелов к горизонтали периодически измен ют по ходу плавки.This is achieved by the fact that the roots of the torches are removed from each other by a distance of 0.3-0.8 of the width of the bath, the flame from the front wall of the furnace is directed at an angle of 15-30 °, and the flame from the side of the back stack of the furnace is parallel .or at an angle of up to 50 ° to the longitudinal axis of the furnace. In addition, the angle of inclination of the torch on the side of the front wall to the horizontal is 10-25 ° greater than the angle of inclination of the torch on the side of the rear wall of the furnace. The fuel consumption in the torch from the front wall can be 1.2-2.7 times greater than in the torch from the rear wall, the angle of inclination of the torches to the horizontal periodically change along the course of melting.

На фиг. 1 и 2 схематически изображена мартеновска печь.FIG. 1 and 2 schematically depicts the open-hearth furnace.

В своде 1 расположены две топливно-кислородные горелки 2 со стороны передней стенки 3 и горелка 4 со стороны задней стенки 5, расположенные друг от друга на рассто нии 0,3-0,8 ширины ванны. Горелка 2In the vault 1 there are two fuel-oxygen burners 2 on the side of the front wall 3 and a burner 4 on the side of the rear wall 5, which are located 0.3-0.8 times the width of the bath. Burner 2

направлена под углом oi, равным 15-30° к продольной оси, а горелка 4 параллельно или под углом 02 до 15° к ней. Угол наклона |3i горелки 2 к горизонтали должен быть больше угла наклона горелки 4 2 на 10-25°.directed at an angle oi equal to 15-30 ° to the longitudinal axis, and the burner 4 in parallel or at an angle of 02 to 15 ° to it. The angle of inclination | 3i of the burner 2 to the horizontal should be greater than the angle of inclination of the burner 4 2 by 10-25 °.

Дл улучшени равномерности нагрева расход топлива в горелку 2 целесообразно поддерживать на уровне в 1,2-2,7 раза больше , чем расход его в горелку 4. В процессе нагрева шихты горелки 2 и 4 периодическиTo improve the uniformity of heating, the fuel consumption in the burner 2 is advisable to be maintained at a level 1.2-2.7 times greater than its consumption in the burner 4. In the process of heating the charge of the burner 2 and 4, periodically

покачивают, измен тем самым угол наклона факела относительно шихты.shake, thus changing the angle of the torch relative to the charge.

Благодар предложенному направлению факелов и соотношению расхода на пих топлива достигаетс нагрев шихты по Bceii площади ванны.Due to the proposed direction of the torches and the ratio of the flow rate for their fuel, heating of the charge over Bceii of the bath area is achieved.

Предмет изобретени Subject invention

Claims

1. A method of heating a steel-smelting furnace, including the supply of fuel from the end of a bath in the form of two fuel-oxygen torches at an angle to the horizontal plane from the front and rear walls of the furnace, characterized in that, in order to improve the uniform heating of the charge in the bath, the roots of the torches are removed from each other at a distance of 0.3–0.8 of the width of the bath, the flame from the non-medium wall of the furnace is directed at an angle of 15–30 °, and the flame from the rear wall of the furnace is parallel or at an angle of up to 15 ° to the longitudinal furnace axis.

2. A method according to claim 1, characterized in that the angle of inclination of the torch from the front wall side to the horizontal is 10 ° and 25 ° greater than the angle

inclination of the torch from the rear wall of the nechi.

3. Method according to paragraphs. 1-2, differs in that the fuel consumption in the torch from the front wall of the furnace is 1.2-2.7 times greater than in the torch from the rear wall.

4. Method according to paragraphs. 1-3, characterized in that the angle of inclination of the torches to the horizontal plane is periodically changed along the smelting process.