A method for removing the lining of a rotary anode furnace

Abstract

The present invention provides a method for removing the lining of a rotary anode furnace. First, the auxiliary equipment and facilities around the furnace body are removed so that the anode furnace body can rotate 360 ​​degrees along its axis; then, the brick lining is manually cleared and grooved in the furnace body in a horizontal direction. During the groove process, the upper and lower brick bodies are supported and tightened by a screw rod. After the groove is completed, part of the screw rod is removed, and a waste copper mold with a weight of about 3 tons is added. The anode furnace body is rotated, and the waste copper mold is used to smash the adhesive and brick lining in the furnace, and large pieces are broken at the same time. The broken small pieces are poured out from the furnace mouth and the smoke outlet, so as to realize the rapid cleaning of the brick lining of the rotary anode furnace body. The method of the present invention greatly reduces the maintenance time of the anode furnace and improves the safety of the dismantling operation.

Description

Technical Field

[0001] The invention belongs to the technical field of metal smelting, and in particular relates to a method for removing the lining of a rotary anode furnace. Background Art

[0002] During the cold repair of the anode furnace, when it is necessary to remove all the furnace brick linings, Chinese invention patent CN202110971149.4, a method for hot replacement of redox port bricks in a rotary anode furnace, comprising the following steps: S1. After the copper stored in the rotary anode furnace is discharged, the furnace is extinguished and the anode furnace is turned to 0°; S2. Outside the furnace body, the redox port brick locking device and the redox port brick are manually removed; S3. The debris around the redox port brick is cleaned, and the outer surface of the new redox port brick and the contact surface of the cylinder bricks around it are evenly coated with Apply refractory mortar; S4. If the cylinder bricks around the oxidation-reduction port bricks are also burned, manually remove the cylinder bricks around the oxidation-reduction port bricks; S5. Apply refractory mortar evenly on the contact surface between the new cylinder bricks and the old cylinder bricks, the oxidation-reduction port bricks and the sleeve bricks; S6. Lay the new cylinder bricks, and evenly apply refractory mortar on the outer surface of the new oxidation-reduction port bricks and the contact surface of the cylinder bricks around them; S7. Then lay the new oxidation-reduction port bricks and press the masonry; S8. Install the oxidation-reduction port brick locking device and turn the anode furnace to the normal working position. The beneficial effects of the invention are: simple operation method, short replacement time, small impact on rotary furnace production, and reduced production costs; ensuring the safety of workers' operation and avoiding working in a high temperature environment.

[0003] However, when the adhesion inside the furnace is too large or the brick lining of the furnace body is too short, the brick lining is difficult to fall off when grooving and rotating the furnace body. At the same time, the partially detached adhesion and brick lining are too large to be poured out from the furnace mouth. Workers can only enter the furnace body and use smashers, pneumatic picks and other equipment to break them at the furnace mouth. The brick lining removal speed is slow and the safety risk is high. Summary of the invention

[0004] Aiming at the defects of high risk factor and slow brick lining removal during cold repair of existing anode furnace, the present invention provides a method for removing the lining of a rotary anode furnace, so as to realize rapid cleaning of the brick lining of a rotary anode furnace.

[0005] The present invention is achieved through the following technical solutions:

[0006] A method for removing a rotary anode furnace lining comprises the following steps:

[0007] (1) Remove the auxiliary equipment and facilities around the anode furnace body so that the anode furnace body can rotate 360° along its axis;

[0008] (2) Confirm that the temperature in the anode furnace has dropped to room temperature, ensure ventilation in the furnace, and measure the oxygen concentration in the furnace to be qualified before entering the anode furnace body to carry out dismantling operations;

[0009] (3) Use a steel chisel, a sledgehammer or a pneumatic pick to hit the refractory brick lining inside the anode furnace body and make grooves horizontally along the furnace body;

[0010] (4) Every 1 to 2 m of slotting, use a screw to support and tighten the upper and lower bricks;

[0011] (5) After the slotting is completed, remove 30% to 50% of the screw rods, and then put the copper mold into the furnace mouth;

[0012] (6) The anode furnace is rotated along its axial direction, and the refractory brick lining is broken and removed by a copper mold. The broken bricks and adhesives are poured out from the smoke outlet and the furnace mouth, and the anode furnace lining is removed.

[0013] Preferably, the amount of copper mold added is 1 to 3 pieces; the weight of the copper mold is 1 to 5 tons.

[0014] Preferably, the slot width is 500-2000 mm.

[0015] The working principle of the present invention is as follows:

[0016] When removing the brick lining in the furnace body of the rotary anode, the brick lining is manually cleaned horizontally in the furnace body to dig a groove with a width of about 500 to 2000 mm. After the grooving is completed, the furnace body is rotated to cause the brick lining in the furnace to fall off. Using the principle of a ball mill, when the furnace body is rotated, a heavy copper mold is added to knock off the adhesive and brick lining in the furnace, and at the same time, large pieces of brick lining are broken. The broken small pieces of brick lining are poured out from the furnace mouth and smoke outlet, and will not block the smoke outlet or furnace mouth of the furnace body, thereby achieving rapid cleaning of the brick lining of the rotary anode furnace body.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. Compared with the traditional dismantling method which takes about 6 days, the method of the present invention can control the dismantling time of the anode furnace lining to be completed within 3 days, which greatly reduces the difficulty and operation cycle of the lining dismantling.

[0019] 2. When the method of the present invention is used, workers only need to perform manual grooving operations when removing the furnace lining, thereby reducing the intensity of work at the post; after completing the grooving operations, all workers can evacuate, and workers do not need to enter the furnace to work, thereby reducing the safety risks of working in the furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a cross-sectional schematic diagram of an embodiment of an anode furnace being grooved and a copper mold being added into the furnace.

[0021] Figure 2 It is a longitudinal cross-sectional schematic diagram of an embodiment of an anode furnace being grooved and a copper mold being added into the furnace.

[0022] Figure numerals: 1-smoke outlet, 2-furnace mouth, 3-furnace shell, 4-clay brick, 5-refractory brick, 6-copper mold, 7-screw. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the embodiments. Example

[0024] The design value of the rotary anode furnace to be dismantled in this embodiment is 660t / furnace; because the brick lining (refractory bricks 5) in the furnace is short and basically not bonded, after the grooving is completed, only part of the bricks of the rotating furnace body fall off, and if personnel enter the furnace body for cleaning, there will be a major safety hazard.

[0025] Therefore, the removal is carried out by the method of the present invention, which is specifically as follows:

[0026] (1) Remove the auxiliary equipment and facilities around the anode furnace body so that the anode furnace body can rotate 360° along its axis.

[0027] (2) Confirm that the temperature inside the anode furnace has dropped to room temperature, ensure ventilation inside the furnace, and measure the oxygen concentration inside the furnace to be qualified before entering the anode furnace body to carry out dismantling operations.

[0028] (3) Use a steel chisel, a sledgehammer or a pneumatic pick to knock on the refractory brick lining inside the anode furnace body and make grooves horizontally along the furnace body with a groove width of 500 mm.

[0029] (4) Every 2m of slotting, use screw rod 7 to support and tighten the upper and lower bricks, such as Figure 1 and Figure 2 shown.

[0030] (5) After the slotting is completed, 50% of the screw rods 7 are removed, and then two copper molds 6 are placed from the furnace mouth 2, each weighing 5 tons.

[0031] (6) The anode furnace is rotated along its axial direction, and the brick lining is impacted by the copper mold 6 to break the refractory brick lining so as to accelerate its falling off. Finally, the broken bricks and adhesives are poured out from the smoke outlet 1 and the furnace mouth 2 to complete the removal of the anode furnace lining.

[0032] The time required to remove the anode furnace lining in this embodiment is 2 days, which greatly reduces the maintenance time. Example

[0033] The design value of the rotary anode furnace to be dismantled in this embodiment is 660t / furnace; the bonding near the burner brick (clay brick 4) in the furnace is relatively thick. After the slotting is completed, large pieces of bonding fall off when the furnace body is rotated and cannot be poured out from the furnace mouth 2. Therefore, 3 copper molds 6 are added to the anode furnace, each weighing 1t. According to the method of Example 1, the slotting width is 2000mm; then the copper mold 6 in the furnace is continuously rotated to collide and break with the bonding and brick body, and finally the broken brick body is poured out from the furnace mouth to complete the brick lining cleaning.

[0034] The time required to remove the lining of the rotary anode furnace in this embodiment is 3 days, which greatly reduces the originally planned maintenance time.

[0035] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A method for removing a rotary anode furnace lining, characterized in that: The following steps are involved: (1) Remove the auxiliary equipment and facilities around the anode furnace body so that the anode furnace body can rotate 360° along its axis; (2) Confirm that the temperature in the anode furnace has dropped to room temperature, ensure ventilation in the furnace, and measure the oxygen concentration in the furnace to be qualified before entering the anode furnace body to carry out dismantling operations; (3) Use a steel chisel, a sledgehammer or a pneumatic pick to hit the refractory brick lining inside the anode furnace body and make grooves horizontally along the furnace body; (4) Every 1 to 2 m of slotting, use the screw rod (7) to support and tighten the upper and lower brick bodies; (5) After the slotting is completed, 30% to 50% of the screw rods (7) are removed, and then the copper mold (6) is placed from the furnace mouth (2); (6) The anode furnace is rotated along its axial direction, and the refractory brick lining is broken by the copper mold (6) so that it falls off, and the broken bricks and adhesives are poured out from the smoke outlet (1) and the furnace mouth (2), thereby completing the removal of the anode furnace lining.

2. The method for removing the lining of a rotary anode furnace according to claim 1, characterized in that: The amount of the copper mold (6) added is 1 to 3 pieces; the weight of the copper mold (6) is 1 to 5 tons.

3. The method for removing the lining of a rotary anode furnace according to claim 1, characterized in that: The slotting width is 500-2000 mm.

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