Smelting Equipment

Abstract

To provide a smelting facility capable of safely removing the staying of a slag gutter.SOLUTION: A smelting facility includes: a building 4; a smelting furnace installed in the building 4; a slag gutter 21 that discharges the molten slag produced in the smelting furnace to a water granulation facility; and a removal rod 50 that removes the staying of the slag gutter 21. The building has a floorboard 41 on the floor above the floor where the slag gutter 21 is located. The floorboard 41 has an insertion hole 42 in the upper part of the slag gutter 21 for inserting the removal rod 50. Workers can remove the staying of the slag gutter 21 while on the upper floor, so that if the molten material jumps or a steam explosion occurs, the workers will not be harmed and the workers are safe.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a smelting facility. More specifically, the present invention relates to a smelting facility capable of safely removing adhesion in a slag trough through which molten slag produced in a smelting furnace flows. [Background technology]

[0002] Patent Document 1 discloses a copper smelting process. Specifically, copper concentrate is first charged into a flash smelting furnace, melted, and separated into matte and slag. The matte is sent to a converter, where Fe and S are removed to produce blister copper. The slag is sent to a smelting furnace, where the matte that was not completely separated in the flash smelting furnace is separated. The molten slag is discharged from the smelting furnace through a slag trough into a granulating trough. The slag is quenched by contact with granulating water, and pulverized to produce granulated slag. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2014-125396 A Summary of the Invention [Problem to be solved by the invention]

[0004] As the slag flows through the slag trough, its temperature drops, and some of it solidifies and adheres to the slag trough. This causes the slag to stick to the slag trough. In order to maintain a good flow of slag through the slag trough, the sticking must be removed periodically. When removing the sticking from the slag trough, the molten slag may splash. Furthermore, since the sticking removed from the slag trough is very hot, if it comes into contact with the granulated water, the granulated water will instantly evaporate. Depending on the shape and size of the removed sticking, the flow of the generated steam may be impeded, causing a steam explosion. Thus, removing the sticking from the slag trough is a dangerous task for workers.

[0005] In view of the above circumstances, an object of the present invention is to provide a smelting facility capable of safely removing slag sticking to a slag trough. [Means for solving the problem]

[0006] The smelting equipment of the first invention comprises a building, a smelting furnace installed in the building, a slag trough that discharges molten slag produced in the smelting furnace to a water granulation facility, and a sticking removal rod that removes sticking from the slag trough, the building having a floor plate on the floor above the floor on which the slag trough is arranged, and the floor plate has an insertion hole formed in an upper portion of the slag trough into which the sticking removal rod is inserted. And, The floor plate is characterized in that a lattice plate is provided around the insertion hole. Second The smelting equipment of the invention is No. 1 In the invention, the sticking removal rod is longer than the height from the floor surface of the floor on which the slag gutter is arranged to the floor surface of the upper floor. Effect of the Invention

[0007] According to the first invention, workers can remove the slag from the slag trough while remaining on an upper floor, so that even if the molten metal splashes or a steam explosion occurs, the workers will not be harmed and are safe. Also, The slag gutter can be visually inspected through the lattice plate, making it easy to remove any slag that has been stuck there. Second According to the invention, the sticking removal rod has a sufficient length so that the sticking of the slag gutter can be removed from the upper floor. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is an explanatory diagram of a smelting facility according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a front view of the slag trough and its surroundings. [Diagram 3] FIG. [Figure 4] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Next, an embodiment of the present invention will be described with reference to the drawings. The smelting facility AA according to one embodiment of the present invention is a copper smelting facility. As shown in FIG. 1, the smelting facility AA includes a flash furnace 1, a smelting furnace 2, and a granulation facility 3.

[0010] The flash smelting furnace 1 has a settler 11. A reaction tower 12 is installed at one end of the settler 11, and an exhaust flue 13 is installed at the other end. A concentrate burner 14 is provided at the upper end of the reaction tower 12. Powdered smelting raw materials and reaction gas are blown into the reaction tower 12 from the concentrate burner 14. The smelting raw materials contain at least copper sulfide concentrate and flux. The smelting raw materials also contain a cooling material and the like as necessary.

[0011] The smelting raw materials blown into the reactor 12 are heated by the heat of the auxiliary burners and the radiant heat from the furnace walls of the reactor 12, and melt as the sulfur and iron in the copper concentrate are burned. The molten smelting raw materials are stored in the settler 11. In the settler 11, the molten material is gravity separated into matte, which is a concentrated form of the target metal (copper), and slag, which is mainly composed of gangue components and impurities.

[0012] The matte at the bottom of the molten metal is extracted from a matte extraction port (not shown) and sent to the converter. In the converter, impurities are removed from the matte to obtain blister copper. The slag at the top of the molten metal is discharged from a slag extraction port. This slag contains some of the desired metal (copper), so if it is discharged directly to the system, it will result in a loss of the desired metal. Therefore, the slag discharged from the flash smelting furnace 1 is processed in the smelting furnace 2.

[0013] An electric furnace, for example, is used as the slag furnace 2. In the slag furnace 2, the target metal contained in the slag is recovered. A slag trough 21 is connected to the slag outlet of the slag furnace 2. The slag produced in the slag furnace 2 after the target metal is separated is discharged through the slag trough 21. The slag flowing through the slag trough 21 is in a molten state. Hereinafter, this slag will be referred to as "molten slag." The molten slag is discharged from the slag trough 21 to the water granulation equipment 3.

[0014] The granulation equipment 3 has a granulation trough 31 and a granulation pit 32. Granulation water flows into the granulation trough 31. Molten slag flows from the slag trough 21 into the granulation trough 31. The molten slag comes into contact with the granulation water and is granulated by rapid cooling and solidification to become granulated slag. The granulated slag flows together with the granulation water from the granulation trough 31 into the granulation pit 32. The granulated slag accumulated in the granulation pit 32 is scooped up and collected by a bucket elevator 33.

[0015] In this embodiment, the slag slag furnace 2 corresponds to the "slag furnace" described in the claims. The slag slag furnace 2 is installed in a building 4. As shown in FIG. 2, the slag trough 21 is arranged on a specific floor of the building 4. The building 4 also has a floor one floor above the floor on which the slag trough 21 is arranged. Hereinafter, the floor on which the slag trough 21 is arranged is referred to as the "lower floor," and the floor one floor above that is referred to as the "upper floor."

[0016] The upper floor has floorboards 41. The floorboards 41 form the floor surface of the upper floor and also form the ceiling of the lower floor. In other words, the floorboards 41 are boards that separate the upper floor from the lower floor. The floorboards 41 are strong enough for at least a worker to stand on. The floorboards 41 are supported by supporting members such as floor joists and floor beams as necessary.

[0017] An insertion hole 42 that connects the upper floor and the lower floor is formed in the floor plate 41. The insertion hole 42 is formed in the floor plate 41 in a portion above the slag trough 21. A sticking removal rod 50 can be inserted into the insertion hole 42.

[0018] As shown in FIG. 3, an opening 43 larger than the insertion hole 42 is formed in the floor plate 41. A lattice plate 44 is fitted into the opening 43. The lattice plate 44 is a lattice-shaped plate material, and has a rigidity sufficient to prevent damage even when a worker stands on it. For example, an expanded metal can be used as the lattice plate 44. A part of the lattice plate 44 is cut out, and this cut out part becomes the insertion hole 42. In this manner, the lattice plate 44 is provided around the insertion hole 42.

[0019] As shown in Figure 2, workers can remove the stuck slag from the slag gutter 21 while staying on an upper floor. Specifically, a worker on an upper floor inserts a sticking removal rod 50 into the insertion hole 42 and pokes and removes the stuck slag from the slag gutter 21 with the tip of the sticking removal rod 50. At this time, the worker can visually check the slag gutter 21 through the lattice plate 44. This makes it easy to remove the stuck slag.

[0020] As shown in FIG. 3, the insertion hole 42 preferably has a partition member 45. In the example shown in FIG. 3, a bar is provided as the partition member 45 in the center of the insertion hole 42. By leaning the sticking removal rod 50 against the partition member 45, the sticking removal rod 50 can be positioned in the center of the insertion hole 42 without being supported by hand. If the partition member 45 is directly above the slag trough 21, the sticking removal rod 50 can be easily inserted into the slag trough 21 even during initial positioning by pressing the sticking removal rod 50 against the partition member 45 and inserting it vertically. If the partition member 45 is arranged along the slag trough 21, it is also easy to move the sticking removal rod 50 along the slag trough 21. The partition member 45 does not necessarily have to be from one end of the insertion hole 42 to the other.

[0021] As mentioned above, when removing the slag gutter 21, the melt may splash or a steam explosion may occur. However, since the workers can remove the slag gutter 21 while staying on the upper floor, they are protected by the floorboards 41 even if the melt splashes or a steam explosion occurs. Therefore, the workers are safe and will not be harmed.

[0022] The sticking removal rod 50 is a rod made of a material that can withstand the temperature of the molten slag and the sticking. The sticking removal rod 50 only needs to be long enough to reach the slag trough 21 from the upper floor. Specifically, the sticking removal rod 50 is at least longer than the height of the lower floor (the height from the floor surface of the lower floor to the floor surface of the upper floor). In addition, it is preferable that the sticking removal rod 50 is 1 to 2 m longer than the height of the lower floor. In this way, the sticking removal rod 50 has a sufficient length, so that the sticking of the slag trough 21 can be removed from the upper floor in a comfortable position.

[0023] The sticking removal bar 50 can be shaped, for example, as shown in Fig. 4. The sticking removal bar 50 is a long bar. A gripping portion 51 may be provided at the upper end of the sticking removal bar 50.

[0024] The smelting equipment AA is not limited to copper smelting equipment, and may be smelting equipment for other metals such as nickel. In addition, the smelting furnace that discharges the molten slag is not limited to an electric furnace. The smelting furnace may be a flash furnace, a blast furnace, a reverberatory furnace, or the like. EXAMPLES

[0025] Using the floor plate 41 shown in FIG. 3 and the sticking removal rod 50 shown in FIG. 4, the work of removing the sticking from the slag gutter 21 was carried out in the following procedure. First, the worker stood under the lattice plate 44 in FIG. 3 and looked into the lower floor through the lattice plate 44 to grasp the state of the slag gutter 21 and its surroundings. Next, the worker inserted the sticking removal rod 50 from the insertion hole 42 toward the slag gutter 21 and confirmed that the lower end of the sticking removal rod 50 was inside the slag gutter 21. Next, the worker grasped the sticking removal rod 50 while slag was flowing in the slag gutter 21 and confirmed that the sticking removal rod 50 was inside the slag gutter 21 from the resistance transmitted to the hand. At this time, the worker was able to visually confirm the state of the periphery of the slag gutter 21 and grasp the positional relationship between the lower end of the sticking removal rod 50 and various equipment within the field of view. Next, the sticking removal rod 50 was moved along the slag gutter 21. At first, resistance due to slag buildup was felt, but after that, it was possible to move smoothly. After the discharge of slag into slag trough 21 was stopped, the staff went downstairs to check on slag trough 21 and found that the buildup had been sufficiently removed. [Explanation of symbols]

[0026] AA Smelting Equipment 1 Flash-melting furnace 2. Smelting furnace 21 Slag trough 3 Water fracturing equipment 31 Water breaker gutter 32 Granulation pit 4. Building 41 Floorboards 42 Insertion hole 43 Opening 44 Grid Plate 50 Jufuきremoval stick 51 Handle

Claims

1. The building and A smelting furnace installed in the building; A slag trough for discharging the molten slag produced in the smelting furnace to a water granulation facility; and a sticking removal rod for removing the sticking of the slag trough. The building has a floor plate on an upper floor on which the slag trough is disposed, The floor plate has an insertion hole formed in an upper portion of the slag trough into which the sticking removal rod is inserted, The floor plate is provided with a lattice plate around the insertion hole. The smelting facility is characterized by:

2. The sticking removal rod is longer than the height from the floor surface of the floor on which the slag gutter is arranged to the floor surface of the upper floor.

2. The smelting facility according to claim 1.

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