JP2002062059A - Apparatus for supplying shredder dust to reverberating furnace - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus 23 for supplying shredder dust to a reverberating furnace 21 capable of assuring a sealing characteristic, performing a positive combustion of the shredder dust and increasing an amount of processing when the shredder dust is supplied to the reverberating furnace 21 for refining ore material. SOLUTION: There is provided an apparatus for supplying shredder dust to a reverberating furnace 21 for refining ore material and performing a combustion there. A supplying pipe 25 communicated with an inside part of the reverberating furnace 21 is vertically installed at a ceiling part 21a of the reverberating furnace 21. Shredder dust can be supplied from the supplying pipe 25, oxygen enriching air is supplied to the supplying pipe 25 to enable it to be blown into the reverberating furnace 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shredder dust which is obtained by crushing various wastes and the like by incineration, by supplying the shredder dust to a refractory furnace for smelting ore and burning it. And a shredder dust supply device.

[0002]

2. Description of the Related Art In Japan, the treatment of industrial waste has recently become a serious social problem. Landfilling waste
The land area is now strictly forbidden due to its limited land area, and incineration methods are also regulated in order not to produce dioxins. Under such circumstances, in order to recover various metals such as copper, gold, silver and palladium without generating dioxin, the inventors of the present invention,
We are trying to treat car shredder dust in a reverberatory furnace. Here, shredder dust is a general term for fluff materials generated by crushing end-of-life vehicles to recover iron and aluminum, and is easier to burn than chipped tires and reduces valuable metals. For this reason, the shredder dust treatment rate has been improved in such attempts.

FIG. 9 shows a schematic flow sheet in such an attempt. In this flow sheet, a reverberatory furnace 1 is a green charge type reverberatory furnace for smelting minerals, particularly for refining copper concentrate, and industrial waste such as shredder dust of automobiles is stored in a stock yard 2 of a smelter. It is conveyed from the feed hopper 3 to the reverberatory furnace 1 by the belt conveyor 4 and is loaded into the reverberatory furnace 1 by a supply pipe such as a pipe chute and processed in the reverberatory furnace 1 together with copper concentrate. Further, oxygen-enriched air is supplied to the reverberatory furnace 1 from an oxygen plant 5.

[0004] Further, the exhaust gas from the reverberatory furnace 1 is cooled by a waste heat boiler 6 for recovering heat, dust is recovered in an electric precipitator 7, and SO ₂ in the gas is recovered.
Is collected as gypsum in the waste plaster plant 8.
The steam generated in the waste heat boiler 6 is used to generate electric power in the power generation device 9, and the amount of power generation is equal to half of the total power consumption in the smelter. On the other hand, in the converter making period, the dry ore and oxygen from the oxygen plant 5 are blown into the converter 10 and the exhaust gas is discharged into the boiler 11.
And sent to the sulfuric acid plant 13 via the electric dust collector 12. The anode generated from the converter 10 through the purification furnace 14 becomes electrolytic copper in the electrolytic refining factory 15. And in this electrolytic refining factory 15, gold, silver, and palladium are collected as anode slime.

[0005]

By the way, while continuing such attempts, the inventors of the present invention have problems to be solved when burning shredder dust in the reverberatory furnace 1. We paid attention to. One of them is that the amount of shredder dust to be processed in the reverberatory furnace 1 is limited by the amount of exhaust gas discharged from the reverberatory furnace 1. That is, the inside of the reverberatory furnace 1 becomes an oxygen-deficient atmosphere due to the combustion exhaust gas from the burner burned directly into the reverberatory furnace 1 and burned, or the exhaust gas generated by the combustion of the already supplied shredder dust. Even if a new shredder dust is introduced, the shredder dust is not easily burned, but only accumulates in the reverberatory furnace 1 and may not be treated.

Further, as described above, the shredder dust is stored in the stock yard 2 of the smelter, conveyed from the feed hopper 3 by the belt conveyor 4, and charged and supplied to the reverberatory furnace 1 by a pipe chute or the like. However, for example, if the pipe chute is erected on the ceiling of the reverberatory furnace 1 and the shredder dust is simply introduced, the amount of exhaust gas increases and the negative pressure state in the reverberatory furnace 1 is sufficiently increased. If it is no longer maintained, exhaust gas and combustion gas in the furnace may blow out through the pipe chute. For this reason, such pipe chutes must be provided with a double damper, for example, to ensure sealing properties so that gas inside the furnace does not blow out even when shredder dust is supplied. Not only is the supply operation complicated, but also continuous supply becomes difficult, which results in the limitation of the shredder dust throughput.

The present invention has been made under such a background, and when the shredder dust is supplied to the refractory furnace for smelting and burning as described above, the sealing property is secured. It is another object of the present invention to provide an apparatus for supplying shredder dust to a reverberatory furnace, which can surely burn the shredder dust and increase the throughput.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and to achieve the above object, the present invention provides a reflection furnace for supplying shredder dust to a refractory furnace for smelting ore and burning it. An apparatus for supplying shredder dust to a furnace, wherein a supply pipe communicating with the inside of the reverberatory furnace is erected on a ceiling portion of the reverberatory furnace, and the shredder dust can be supplied from the supply pipe. Is characterized in that oxygen-enriched air can be further supplied and blown into the above-mentioned reverberatory furnace. Therefore, according to the supply device having such a configuration, since the oxygen-enriched air is supplied into the furnace together with the shredder dust from the supply pipe, the supplied shredder dust can be supplied even when the atmosphere in the reverberatory furnace is insufficient for oxygen. It is possible to reliably burn, and by blowing the oxygen-enriched air in this way, it is possible to seal the supply pipe even when supplying shredder dust,
It is possible to prevent the gas in the furnace from blowing out through the supply pipe.

Here, when the oxygen-enriched air is supplied from the supply pipe into the furnace together with the shredder dust,
For example, if these are to be supplied collectively from a single supply pipe from the beginning, if the shredder dust is clogged in the supply pipe, the supply of oxygen-enriched air may be hindered and the sealability may be impaired. Therefore, it is desirable that the supply pipe be branched on the way to supply the shredder dust from one side and blow the oxygen-enriched air from the other side. Further, when the supply pipe is branched in this way, a blowing pipe having a smaller diameter than the supply pipe is inserted into the other of the branched supply pipes, and the tip thereof is located near the part where the supply pipe branches. And by blowing the oxygen-enriched air from this blowing pipe, a negative pressure can be generated in one of the branched supply pipes to which shredder dust is supplied, and the above-described shredder in one of the supply pipes can be generated. Dust clogging itself can be prevented.

[0010]

1 to 8 show an embodiment of the present invention. In this embodiment, the present invention is applied to a green charge type reverberatory furnace 21 for smelting copper concentrate. It was done. In the present embodiment, as shown in FIG. 1, two reverberatory furnaces 21 and 21 are arranged in parallel.
The ceiling portions 21a of the reverberatory furnaces 21 and 21 are provided with eight loading ports 22..., And supply of the shredder dust of this embodiment as shown in FIG. A device 23 is provided.
Here, this reverberatory furnace 21 is shown in FIGS.
As shown in the figure, the rectangular shape is substantially rectangular in plan view, and one end in the longitudinal direction (the lower side in FIG. 1, the right side in FIGS. 3 and 4) is the burner side,
A plurality of windows 21c for inserting a burner are formed in the wall portion 21b at one end in the longitudinal direction, and the wall portion at the other end side in the longitudinal direction (the upper side in FIG. 1, the left side in FIGS. 3 and 4). Two boilers 24, 24 are connected to one reverberation furnace 21 at 21d. A plurality of copper ore input hoppers (not shown) are arranged on the burner side of the ceiling 21a of the reverberatory furnace 21 so as to be arranged along the walls 21e, 21e extending in the longitudinal direction of the reverberatory furnace 21. Have been.

The ceiling 21a of each of the reverberatory furnaces 21 is formed such that approximately half of one end in the longitudinal direction, which is the burner side, is slightly raised from the other end as shown in FIG. The above-mentioned 8
Are provided. In the present embodiment, these loading ports 22 are arranged around a center line O in the width direction of the reverberatory furnace 21 in plan view (the left-right direction in FIGS. 1 and 5 and the up-down direction in FIG. 4). The same number of four are arranged on the opposite side with O interposed therebetween, and are arranged in two rows on each side so as to form a row parallel to the center line O. The loading ports 22A in each row are arranged. , 22B... And the center line O are made equal to each other.

Further, four loading ports 22A for each row are provided.
, 22B are arranged at equal intervals in the direction of the center line O, that is, in the longitudinal direction, and between the rows, the intervals between the loading ports 22, 22 adjacent to each other in the direction of the center line O are equal to each other. Moreover, in the direction of the center line O, one loading port 22 in the other row is located at the center between the adjacent loading ports 22 in one row.
That is, the loading ports 22A and the loading ports 22B are alternately arranged in a staggered arrangement in the center line O direction in both rows. The portion of the ceiling 21a where these loading ports 22 are provided has a water-cooled copper jacket structure.

The supply device 23 of the present embodiment is provided at each of the loading ports 22 arranged as described above.
As shown in FIG. 2, a lower end is connected to the loading port 22 and opens into the reverberatory furnace 21. The supply pipe 25 includes a supply pipe 25 erected on a ceiling 21a so as to extend vertically upward. More specifically, as shown in FIGS.
The supply pipe 2 extends from the middle of the supply pipe 25 extending in the vertical direction.
A branch pipe 26 having the same diameter as that of the supply pipe 5 is branched so as to extend obliquely upward, and a blowing pipe 27 having a smaller diameter than the supply pipe 25 is inserted into the supply pipe 25 coaxially from the upper end thereof. Have been. A hopper 28 is provided at the upper end of the branch pipe 26 via a removable insertion damper, while a supply pipe 25 into which the blowing pipe 27 is inserted.
The upper end of the blow-in pipe 27 is sealed by a lid 29, and the lid 29 is provided with an inspection window 29a made of heat-resistant glass and an inspection port 29b which is normally closed. .

Here, among the supply devices 23 attached to the loading ports 22..., The supply devices 2 attached to the four loading ports 22 A in the one row.
3A, as shown in FIG.
6 is the center line O from the position near the upper end of the supply pipe 25.
Are branched obliquely upward in a direction away from the center line O along a plane perpendicular to the plane. On the other hand, in the supply devices 23B attached to the loading ports 22B in the other row opposite to the loading ports 22A in one row across the center line O, as shown in FIG. The long branch pipe 26 is parallel to the branch pipe 26 of the supply device 23A at the same inclination angle along a plane also perpendicular to the center line O from a position near the lower end of the supply pipe 25, and the center line O in plan view. Are branched obliquely upward so as to extend toward the one supply device 23A... (Note that in FIG. 2, the inclination angle of the branch pipe 26 differs between the two supply devices 23A and 23B for the sake of explanation). As shown).

By making the length of the branch pipe 26 different from the branch position from the supply pipe 25 in this way,
In these supply devices 23A, 23B, the positions of the loading ports 22A, 22B in the width direction, that is, the positions of the supply pipes 25 are different, but the hopper 2
8 are aligned in the width direction and have the same height as shown in FIG. 6, and are alternately arranged on the straight line parallel to the center line O by the supply devices 23A, 23B. I have. Further, the shuttle conveyor 3 extending parallel to the center line O is provided directly above the hoppers 28 of the supply devices 23A, 23B,.
In a state in which the insertion damper of the branch pipe 26 is removed and a feed hopper 31 (corresponding to the feed hopper 3 in FIG. 9) as shown in FIG. Shredder dust conveyed via the belt conveyor 4)
By being fed from the shuttle conveyor 30 into the hoppers 28 of the respective supply devices 23..., The supply can be performed from the supply pipe 25 into the reverberatory furnace 21 via the branch pipe 26.

On the other hand, from the upper end of the supply pipe 25, the lid 2
9, the blowing pipe 27 inserted into the supply pipe 25 has its lower end reaching a branch portion with the branch pipe 26 in the supply pipe 25, that is, the branch pipe 26 is connected to the supply pipe 25. In the one supply device 23A branched from a position near the upper end of the supply pipe 25, the supply pipe 25
The insertion depth of the blowing pipe 27 from the upper end is also reduced, while the branch pipe 26 branches off from the lower end of the supply pipe 25 in the other supply device 23B.
Of the supply pipe 2
5 is located at substantially the center of an opening formed at a branch portion with the branch pipe 26. And the upper end of the blowing pipe 27 of each supply device 23A ..., 23B ...
Each of them protrudes from the lid 29 and is bent in the horizontal direction and connected to a one-stage large-diameter air supply pipe 33. The air supply pipe 33 is, for example, for an oxygen-enriched air (not shown) such as the oxygen plant 5 in FIG. Oxygen-enriched air of a predetermined concentration and pressure, which is connected to a supply source, is blown out from the blowing pipe 27 through the air supply pipe 33, and blown into the reverberatory furnace 21 together with the shredder dust supplied through the branch pipe 26. It is possible. A work floor 34 is laid at an interval above the ceiling 21a of the reverberatory furnace 21. The work floor 34 is provided with a water cooling plate for shutting off heat from the reverberatory furnace 21 in this embodiment. The supply pipe 25 and the branch pipe 26
Is projected above the work floor 34.

Therefore, the reverberatory furnace 21 constructed as described above is used.
In the supply device 23 for the shredder dust to the shredder dust, the supply pipe 25 erected through the loading port 22 on the ceiling 21a of the reverberatory furnace 21 and the shredder dust supplied through the branch pipe 26 together with the blowing pipe Since the oxygen-enriched air blown from 27 is supplied into the reverberatory furnace 21, the shredder dust is injected into the reverberatory furnace 21 while burning by the oxygen-enriched air supplied together. Even if the inside is an oxygen-deficient atmosphere, the supplied shredder dust can be reliably burned at a high temperature. For this reason, shredder dust from waste automobiles and the like can be surely treated without generating harmful substances such as dioxin, and the heat of combustion is effectively used for smelting of mineral materials (copper ore). be able to.

Further, by supplying the shredder dust together with the oxygen-enriched air into the reverberatory furnace 21 in this manner, the refractory furnace 21 to which the shredder dust is supplied is provided.
The charging port 22 and the supply pipe 25 of the ceiling 21a can be sealed by the blowing pressure of oxygen-enriched air, so that the furnace pressure in the reverberatory furnace 21 also fluctuates and the negative pressure state in the reverberatory furnace 21 is sufficient. Even if it is not maintained, the high-temperature gas in the reverberatory furnace 21 can be prevented from blowing out from the charging port 22 through the supply pipe 25. For this reason, even if a double damper is not provided unlike a conventional chute pipe, it is possible to prevent a situation in which, for example, the conveyor belt of the shuttle conveyor 30 is burned by blowing of such high-temperature gas. And a continuous supply of shredder dust can be achieved. Therefore, according to the supply device 23 having the above-described configuration, it is possible to ensure the sealing performance as described above and to reliably burn the shredder dust, thereby promoting stable and efficient processing of the shredder dust. Can be.

When the shredder dust and the oxygen-enriched air are supplied into the reverberatory furnace 21 through the supply pipe 25 as described above, for example, one supply pipe without the branch pipe 26 as in the present embodiment is used. It is also conceivable to load the pipe with shredder dust and pump it with oxygen-enriched air. However, if such a means causes the shredder dust to become clogged in this single supply pipe, the oxygen-enriched air will be lost. Supply of the oxygen-enriched air may impair the above-mentioned sealing performance. However, in the supply device 23 of the present embodiment, the supply pipe 25 is branched in the middle to provide the branch pipe 26, and the branch pipe 2
6, the oxygen-enriched air is supplied from the upper end side of the supply pipe 25. Therefore, even if the shredder dust is clogged in the branch pipe 26, the supply of the oxygen-enriched air is prevented. Without being interrupted,
At least, the sealing property is ensured, and the blowing of high-temperature gas from inside the reverberatory furnace 21 can be reliably prevented.

In the supply device 23 of the present embodiment, when supplying oxygen-enriched air from the upper end side of the supply pipe 25, a small-diameter blowing pipe 27 is inserted into the supply pipe 25 and the leading end thereof is inserted. The (lower end) is located at a connection portion of the supply pipe 25 with the branch pipe 26, and the oxygen-enriched air is blown into the supply pipe 25 from the blowing pipe 27 at a predetermined pressure to be supplied to the reflection furnace 21. . Accordingly, with this configuration, the inside of the branch pipe 26 is connected to the supply pipe 25 with the oxygen-enriched air blown from the blow pipe 27, so that the connection side with the supply pipe 25 is in a negative pressure state. The shredder dust fed into the feed pipe 26 is fed in such a manner as to be drawn into the supply pipe 26 side, thereby preventing the above-mentioned clogging of the shredder dust itself from occurring and ensuring a reliable and smooth shredder dust. Can be supplied.

On the other hand, in the present invention, when shredder dust is burned in the reverberatory furnace as described above, the amount of shredder dust to be treated in the reverberatory furnace is limited by the amount of exhaust gas discharged from the reverberatory furnace. In view of the problem, the supply device 23 of the above-described embodiment is provided to solve the problem. However, in the case described above, a problem to be solved arises in addition to the problem described above. that is,
If the shredder dust is left unburned when the shredder dust is supplied to the reverberatory furnace, the unburned shredder dust remains in the reverberatory furnace to form small hills. As the distance between the furnace and the ceiling of the reverberatory furnace becomes smaller, when new shredder dust is supplied and burned on it, the combustion flame blows out of the reverberatory furnace from the charging port directly above it. However, there is a risk that the conveyor belt may be burned, and especially if this large hill is formed on the burner side in the reverberatory furnace, the combustion by the burner will be interrupted. Of course, the combustion heat of the burner may not be effectively used for melting the copper ore.

On the other hand, in the supply device 23 of the present embodiment, as described above, the shredder dust is reliably burned by the supply of the oxygen-enriched air without generating unburned residue, and the inside of the furnace is sealed. In addition to this, in the reverberatory furnace 21 according to the present embodiment, the charging port 22 in which the supply device 23 is disposed at the ceiling 21a is connected to the reverberation furnace. Wall part 2 in which 21 burners are inserted
1b, a plurality of staggered arrangements are made in the longitudinal direction of the reverberatory furnace 21, that is, in the combustion direction of the burner.
This can prevent the formation of the above-mentioned large hill-shaped portion in the reverberatory furnace 21 and can prevent the flame from blowing out from the charging ports 22 and / or preventing the combustion by the burner from being interrupted. That is, the loading port 2
2 are arranged in a zigzag pattern so that each loading port 22
Since the distance between them is larger than, for example, the case where they are arranged in a lattice, it is possible to prevent the hills from being increased even if hills are formed. Therefore, the distance from the ceiling 21a is maintained. In this way, it is possible to prevent the flame from blowing out and to spread the combustion of the burner to the inside of the reverberatory furnace 1 to melt the copper ore, and to effectively utilize the heat of combustion of the shredder dust.

The reverberatory furnace 21 according to the present embodiment
, The ceiling portion 21a is formed such that a portion on one end side in the longitudinal direction of the reverberatory furnace 21, which is the burner side, is raised more than the other end side, and the loading port 22 is formed on the raised portion. Are arranged in a zigzag pattern. Therefore, even if the hill portion is formed as described above, a sufficient interval between the hill portion and the ceiling portion 21a can be ensured, so that flame blowing can be more reliably prevented. Becomes possible.

Further, the reverberatory furnace 21 according to this embodiment
Then, the loading ports 22 arranged in a staggered manner in this way are ...
Of the supply devices 23A attached to one row of the loading ports 22A parallel to the center line O of the reverberatory furnace 21, a short branch pipe 26 branches off from a position near the upper end of the supply tube 25. On the other hand, in the supply devices 23B attached to the loading ports 22B in the other row, a long branch pipe 26 is branched from a position near the lower end of the supply pipe 25 in parallel with the branch pipe 26 of the supply device 23. Although the loading ports 22A, 22B are arranged in a staggered manner, the upper end positions of the branch pipes 26 to which shredder dust is supplied coincide with the height and the position in the width direction. The hoppers 28 are arranged in a line. Therefore, in the reverberatory furnace 21, the shuttle conveyor 30 that supplies the shredder dust from the hoppers 28 to the supply pipes 25 of the supply devices 23A, 23B through the branch pipes 26.
May be arranged in a single line, and the loading ports 22 are arranged in a staggered pattern in a plurality of lines, so that a plurality of lines of the shuttle conveyor 30 are not required, which is economical and efficient.

In this reverberatory furnace 21, the loading ports 22 are arranged in two rows in a zigzag pattern. However, depending on the size of the reverberating furnace 21, the number of loading ports 22 is three or more. They may be arranged in a staggered manner in rows. Further, as described above, the supply devices 23A.
In FIG. 2B, instead of making the branch position of the branch pipe 26 from the supply pipe 25 different to make the inclination angles of the branch pipes 26 equal, instead of making the inclination angles of the branch pipes 26 different as shown in FIG. Alternatively, both the branch position and the inclination angle may be different.

[0026]

As described above, according to the present invention,
When shredder dust is supplied to a reverberatory furnace for ore smelting and burned, this shredder dust is supplied to the reverberatory furnace together with oxygen-enriched air, and the amount of exhaust gas in the reverberatory furnace increases, resulting in a shortage of genuine products. The shredder dust supplied can be reliably burned even in the atmosphere described above, and the reverberatory furnace can be sealed by blowing the oxygen-enriched air.
Exhaust gas in the furnace can be prevented from blowing out. Therefore, regardless of the amount of exhaust gas in the reverberatory furnace, it is possible to increase the amount of processing shredder dust.
It is possible to promote stable and efficient processing of shredder dust and effectively use the heat of combustion for smelting of mineral materials.

[Brief description of the drawings]

FIG. 1 is a plan view schematically showing a reverberatory furnace 21 according to one embodiment of the present invention.

FIG. 2 is a side view schematically showing the supply device 23 according to the embodiment of the present invention, as viewed in the direction of arrow A in FIG.

FIG. 3 is a side sectional view showing details of a reverberatory furnace 21 according to one embodiment of the present invention.

FIG. 4 is a plan cross-sectional view of the reverberatory furnace 21 shown in FIG. 3 (however, a portion below the center line O is a BB cross section in FIG. 3).

FIG. 5 is a half sectional view of CC in FIG. 3;

FIG. 6 is a plan view showing details of a supply device 23 of one embodiment of the present invention.

FIG. 7 is a sectional view taken along the line DD in FIG. 6;

8 is an EE cross-sectional view in FIG.

FIG. 9 is a flow sheet of an attempt to supply shredder dust to the reverberatory furnace 1 for smelting copper concentrate.

[Explanation of symbols]

 Reference Signs List 21 reverberatory furnace 21a ceiling part 22 of reverberatory furnace 21 (22A, 22B) loading port 23 (23A, 23B) supply device 25 supply pipe 26 branch pipe 27 blowing pipe O center line in the width direction of reverberatory furnace 21

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F23G 5/44 ZAB F23G 5/44 ZABF 4K055 7/00 ZAB 7/00 ZABB 4K063 F23L 7/00 F23L 7 / 00 B F27B 3/18 F27B 3/18 3/22 3/22 F27D 7/02 F27D 7/02 // C22B 1/00 601 C22B 1/00 601 (72) Inventor Takayuki Sato Onahama Nagisa Onahama, Iwaki City, Fukushima Prefecture 1-1 Onahama Smelting & Refining Co., Ltd. Onahama Smelter & Refining Co., Ltd. F-term (reference) AA09 AA41 BA14 CA01 GA03 4K045 AA04 BA10 RB12 RC01 4K055 AA00 FA05 FA08 4K063 AA02 BA13 CA02 CA06 DA23

Claims (3)

[Claims] An apparatus for supplying shredder dust to a reverberatory furnace for supplying shredder dust to a refractory furnace for ore smelting and burning the shredder dust. A communicating supply pipe is provided upright, and the shredder dust can be supplied from the supply pipe, and further, oxygen-enriched air is supplied to the supply pipe and can be blown into the inside of the reverberatory furnace. A device for supplying shredder dust to a reverberatory furnace. 2. The supply pipe according to claim 1, wherein the supply pipe is branched in the middle, and the shredder dust is supplied from one of the supply pipes, and the oxygen-enriched air is blown from the other supply pipe. Shredder dust supply device to reverberatory furnace. 3. A blowing pipe having a diameter smaller than that of the supply pipe is inserted into the other of the branched supply pipes, and a tip thereof is located near a portion where the supply pipe branches. 3. The apparatus for supplying shredder dust to a reverberatory furnace according to claim 1, wherein the oxygen-enriched air is blown from the blowing pipe.