Combustor of large rotating furnace

Abstract

The invention relates to a combustor of a large rotating furnace, belonging to a component of a smelting furnace. The combustor of the large rotating furnace mainly comprises an air blower (1), an air blower motor (3) and a cylindrical high titanium steel burner nozzle (2) , wherein an air tube (4) is additionally arranged between an air outlet of the air blower (1) and the cylindrical high titanium steel burner nozzle (2) so as to lengthen a distance between the centre of the air blower motor (3) and a fire port (5). By using the combustor of the large rotating furnace, the air blaster motor can be protected against high temperature damage, the service life of the air blaster motor is prolonged, and the production cost is reduced.

Description

technical field [0001] The invention relates to parts of a smelting furnace, in particular to a large converter burner. Background technique [0002] In a silver smelting plant, the conventional production process flow is: lead electrolysis anode slime → large converter reduction smelting → precious lead → small converter oxidation refining → crude silver → electrolytic refining → precipitation of silver powder → casting mold → silver ingot. In the large converter reduction smelting process, diesel is used as fuel, and the melting temperature is as high as 1250 °C. The structure of its burner is shown in the appendix figure 1 It is a blower 1 and the air outlet has a cylindrical burner 2 of high titanium steel. The length of burner 2 is generally 400-500mm, so the center of the blower motor of the conventional burner is only 740-840mm away from the burner of the large converter, and the temperature of the burner is usually above 100℃. Cause positive pressure in the furnac...

AI Technical Summary

Problems solved by technology

The length of the burner 2 is generally 400-500mm, so the center of the blower motor of the conventional burner is only 740-840mm away from the burner of the large converter, and the temperature of the burner is usually above 100°C. If the smoke exhaust from the smoke outlet of the large converter is not smooth Positive pressure in the furnace is caused, the flame will be ejected from the burner to the outside of the furnace, resulting in a higher temperature of the burner, and the blower motor will be baked at high temperature for a long time, which will easily cause the aging of the wires and coils and cause short circuit damage

Therefore, the life of the blower motor of a conventional burner is only 2 to 4 months, and the cost of replacing the blower motor for one year is about 4,000 yuan.

Moreover, due to the frequent replacement of the burner motor, the large converter must be shut down for maintenance frequently, resulting in a drop in the temperature inside the furnace, prolonging the furnace time, requiring more diesel oil consumption, and degrading the melting effect.

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