JPH0546947U - Concentrate burner - Google Patents

Abstract

(57) [Abstract] [Purpose] In a concentrate burner installed on the ceiling of a reaction tower of a metal raw material smelting and smelting furnace, it is hung in the air passage to the reaction tower of the concentrate burner and faces it. Provided is a concentrate burner capable of preventing a positional deviation of a wind speed controller that changes a gap between a wall of an air blowing passage and the wall. [Structure] A centering plate 15 is projectingly provided on a surface of a wind speed controller 10 that is suspended in an air passage to a reaction tower of a concentrate burner, the surface facing the wall surface of the air passage. [Effect] Even if the wind speed regulator is displaced, the drift of the air flow does not exceed the predetermined level, the reactivity of the metal raw material with air or oxygen-enriched air is deteriorated, the side wall of the reaction tower is melted, and the air flow path is blown. The fusion of molten particles in the outlet is prevented, the maintenance work of the concentrate burner is reduced, and the concentric arrangement of the parts during assembly of the concentrate burner is facilitated.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a concentrate burner installed on a ceiling portion of a reaction furnace of a flash smelting furnace for a metal raw material such as non-ferrous metal.

[0002]

[Prior Art]

 FIG. 2 is an explanatory view showing the structure of a conventional concentrate burner. For example, in a flash smelting furnace for smelting non-ferrous metal raw materials, in order to cause a good reaction in the reaction tower, the smelting furnace A concentrate burner of this kind is installed on the ceiling of the reaction tower. As shown in the figure, a wind box 2 having a blower tube 1 fixed to the side surface is attached to the ceiling of a reaction tower (not shown), and a concentrate chute 3 is provided at the axial center of the wind box 2. It is arranged. On the upper side surface of the concentrate chute 3, there is provided a charging port 3a for charging a dry ore obtained by drying a concentrate of a non-ferrous metal, which is a metal raw material, into the reaction furnace. A heavy oil burner 5 is extendedly installed in this. The wind box 2 has a cross section that gradually narrows in the direction of the reaction furnace, and the opening to the reaction furnace is a cylindrical burner cone 6. A tubular wind speed adjuster 10 is attached to the ceiling of the wind box 2 by a suspension rod 7 so that its vertical position can be adjusted. The wind box adjuster 10 has a wind box at the tip thereof. A cone portion 10a is formed so as to be parallel to the peripheral surface of No. 2.

When installing the concentrate burner, the heavy oil burner 5, the concentrate chute 3, the wind speed controller 10 and the burner cone 6 are arranged concentrically around the heavy oil burner 5.

In the conventional concentrate burner having such a structure, the dry ore charged from the charging port 3a drops through the concentrate chute 3 and is supplied to the reaction tower, and the blower pipe 1 to the cone portion 10a and the wind box. It is mixed with air or oxygen-enriched air supplied through the gap between the two opposite side surfaces, ignited by the heavy oil burner 5 and reacted in the reaction tower. In this case, when the suspension rod 7 is adjusted to change the gap between the cone portion 10a and the side surfaces of the wind box 2 facing each other, the inflow velocity of the air or the oxygen-enriched air flowing into the reactor changes. Therefore, the optimal flow rate for the reaction is selected to proceed the reaction.

[0005]

[Problems to be solved by the device]

 In the above-mentioned conventional concentrate burner, a difference in thermal expansion occurs during use, so there is a slight misalignment between the heavy oil burner 5, the concentrate chute 3, the wind speed controller 10 and the wind box 2 installed concentrically. Occurs. In the wind speed controller 10, this positional deviation becomes a problem, and when the gap between the side surface of the wind box 2 is different from place to place and becomes non-uniform, the reaction between the non-ferrous raw material dry ore and the reaction air or oxygen-enriched air will occur. It may not happen enough.

Further, the flow of gas and the flow of concentrate particles in the reaction tower of the reactor may be unevenly distributed, which may erode the side wall of the reaction tower. Turbulent flow inside the burner cone 6 causes the concentrate to concentrate. At the outlet of the chute 3, the reacted molten particles may be deposited inside the burner cone 6 and block the concentrate burner.

For this reason, in the conventional concentrate burner, it was necessary to perform the maintenance work for removing the deposits regularly with a considerable frequency.

The present invention has been made in view of the present situation of the concentrate burner of this kind as described above, and an object thereof is to provide a concentrate burner capable of preventing the displacement of the wind speed controller. It is in.

[0009]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a concentrate burner installed on the ceiling of a reaction tower of a metal raw material smelting and smelting furnace, and suspends the concentrate burner in a ventilation passage to the reaction tower. By lowering the distance between the air passage and the wall surface of the air passage, the wind speed regulator that adjusts the flow velocity of the gas sent into the reaction tower is moved closer than a predetermined distance to the air passage wall surface. The blocking means for blocking is provided.

[0010]

[Action]

 With such a configuration, if the gap between the wall surface of the air passage and the tip of the air flow controller narrows to a certain extent due to the difference in thermal expansion between the components during use, the wind speed with respect to the side surface of the wind box will be reduced by the blocking means. The regulator is prevented from approaching more than a predetermined amount. For this reason, it is possible to prevent the drift of the blast from increasing, which causes deterioration of reactivity between the metal raw material and air or oxygen-enriched air, melting of the side wall of the reaction tower, and clogging of the concentrate burner.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to FIG. Here, FIG. 1 is an explanatory diagram showing the configuration of the embodiment.

As shown in FIG. 1, in the embodiment, a centering plate 15 is projectingly provided on the cone portion 10 a of the wind speed controller 10 as a blocking means. The thickness of the centering plate 15 is equal to that of the centering plate 15. When 15 faces the side surface of the opposing wind box 2, the gap between the cone portion 10a of the wind speed controller 10 and the opposing wind box 2 becomes a gap that sets the maximum flow velocity for air or oxygen-enriched air. Is selected. The structure of the other parts of the embodiment is the same as that of the conventional concentrate burner already described with reference to FIG.

Next, the operation of the embodiment having such a configuration will be described.

For example, a dry ore obtained by drying a concentrate composed of a raw material of a non-ferrous metal is introduced into the concentrate ore soot 3 from the introduction port 3a, drops in the ore concentrate chute 3 and is supplied to a reaction tower (not shown). Be done. In this state, air or oxygen-enriched air is blown into the wind box 2 from the blower pipe 1 and the suspension rod 7 is adjusted so that the wind box 2 faces the cone portion 10a of the wind speed controller 10. The gap is set to a desired value, and the air or oxygen-enriched air passing through the gap flows into the burner cone 6 at a flow rate according to the set gap.

Therefore, the dry ore falling in the concentrate chute 3 is mixed with air or oxygen-enriched air flowing in from the gap, ignited by the heavy oil burner 5, and reacted in a reaction tower (not shown). Is smelted.

During this operation, even if the wind speed adjuster 10 is relatively displaced due to a difference in thermal expansion or the like, since the centering plate 15 is provided, it faces the cone portion 10 a of the wind speed adjuster 10. Since the gap between the side surfaces of the wind box 2 does not become narrower than the gap when the maximum flow velocity is set, the drift of the air flow is suppressed to a predetermined value or less. For this reason, the reaction between the dry ore and the air or the air enriched with oxygen is not incomplete, and the side wall of the reaction tower is prevented from being eroded by the uneven flow of the dry ore particles. It is also prevented that the molten particles reacted at the outlet of the concentrate chute 3 become a deposit due to the turbulent flow in the burner cone 6 and weld inside the burner cone 6 to block the concentrate burner. R. Further, upon installation, the concentrate chute 3, the wind speed regulator 10 and the wind box 2 can be easily installed concentrically with the centering plate 15 as a fulcrum.

[0017]

[Effect of the device]

 As described in detail above, in the present invention, in the concentrate burner installed in the ceiling part of the reaction tower of the metal raw material flash smelting furnace, the concentrate burner is installed in the air passage to the reaction tower of the concentrate burner. Therefore, since a blocking means is provided for the wind speed regulator that regulates the flow velocity of the gas fed into the reaction tower, even if the wind speed regulator is relatively misaligned due to a difference in thermal expansion, etc. Uneven drift is prevented, deterioration of reactivity between the metal raw material and air or oxygen-enriched air, melting damage on the side wall of the reaction tower, and deposition of molten particles in the outlet of the air passage to the reaction tower. This reduces the maintenance work on the concentrate burner and facilitates the concentric placement of parts during assembly of the concentrate burner.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a configuration of an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a configuration of a conventional concentrate burner.

[Explanation of symbols]

 1 Blower pipe 2 Windbox 3 Concentrate chute 3a Input port 5 Heavy oil burner 6 Burner cone 7 Hanging rod 10 Wind speed controller 10a Wind speed controller cone part 15 Centering plate

Claims (2)

[Scope of utility model registration request] 1. In a concentrate burner installed on the ceiling of a reaction tower of a metal raw material flash smelting furnace, said air blowers are suspended in an air blowing path of said concentrate burner to said reaction tower and are opposed to each other. A wind speed regulator for adjusting the flow velocity of the gas fed into the reaction tower by changing the distance from the wall surface of the passage is provided with a blocking means for blocking a predetermined or more approach to the wall surface of the blower passage. A concentrate burner characterized in that 2. The concentrate burner according to claim 1, wherein the metal raw material is a non-ferrous metal raw material.