CN217868964U - Bottom-blowing smelting furnace capable of reducing copper content in slag - Google Patents
Bottom-blowing smelting furnace capable of reducing copper content in slag Download PDFInfo
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- CN217868964U CN217868964U CN202222122835.7U CN202222122835U CN217868964U CN 217868964 U CN217868964 U CN 217868964U CN 202222122835 U CN202222122835 U CN 202222122835U CN 217868964 U CN217868964 U CN 217868964U
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Abstract
The utility model provides a bottom-blowing smelting furnace for reducing copper content in slag, which comprises a furnace body and a separating device; a slag tap and a copper tap are respectively arranged at two ends of the furnace body, a charging opening and a smoke outlet are arranged at the top of the furnace body, and a reaction spray gun is arranged at the bottom of the furnace body; when materials are smelted, a flue gas layer, a slag layer and a copper matte layer are sequentially formed in the furnace body from top to bottom; the separating device comprises a partition wall or a copper water jacket which is arranged inside the furnace body and is close to one end provided with a slag tap; the separation device separates the interior of the furnace body into a smelting reaction area and a settling area, and the settling area is close to a slag tap. Utilize the utility model discloses can solve the problem such as copper content height in the slag that the smelting furnace obtained among the prior art.
Description
Technical Field
The utility model relates to a smelting equipment technical field, more specifically relates to a bottom blowing smelting furnace that reduces sediment copper-bearing.
Background
The copper content of the slag produced by the current oxygen-enriched bottom-blown copper (gold) smelting furnace is higher, generally about 3.5 percent, even higher, the direct recovery rate of copper is low, the smelting slag needs to be subjected to slag mineral separation, the produced slag concentrate returns to the smelting furnace, the processing capacity of the smelting furnace is also influenced, and how to directly produce the copper-containing lower slag from the bottom-blown smelting furnace is always the target pursued by metallurgists.
The bottom blowing smelting furnace is a rotary furnace body, the top of the furnace body is provided with a charging port and a smoke outlet, the bottom of the furnace body is provided with a plurality of oxygen lances, the end part of the furnace body is provided with a slag outlet and a copper matte outlet, refractory bricks are built in a steel furnace shell, the inside of the furnace body is an integral furnace chamber, the bottom of a melt is a copper matte layer, the upper part of the melt is a slag layer, and a hearth on the upper part of the slag layer is a smoke layer.
SUMMERY OF THE UTILITY MODEL
In view of the above problems, the present invention provides a bottom blowing smelting furnace with reduced copper content in slag to solve the problems of high copper content in slag obtained by the smelting furnace in the prior art.
The utility model provides a bottom-blowing smelting furnace for reducing copper content in slag, which comprises a furnace body and a separating device; wherein the content of the first and second substances,
a slag tap and a copper tap are respectively arranged at two ends of the furnace body, a charging hole and a smoke outlet are arranged at the top of the furnace body, and a reaction spray gun is arranged at the bottom of the furnace body; when materials are smelted, a flue gas layer, a slag layer and a copper matte layer are sequentially formed in the furnace body from top to bottom;
the separating device comprises a partition wall or a copper water jacket which is arranged inside the furnace body and is close to one end provided with the slag tap; the separation device separates the interior of the furnace body into a smelting reaction zone and a settling zone, and the settling zone is close to the slag tap;
when the partition device is a partition wall, the partition wall is a full-built partition wall, a first hole is formed in an interface between the slag layer and the copper matte layer on the partition wall, the highest point of the first hole is lower than the upper liquid level of the slag layer, and the lowest point of the first hole is lower than the bottom liquid line of the slag layer and is arranged in the copper matte layer;
when the separating device is a copper water jacket, the copper water jacket penetrates through the furnace body along the through length direction, a flow port is formed between the bottom end of the copper water jacket and the bottom of the furnace body, and the upper end of the flow port is higher than the bottom liquid line of the slag layer.
In addition, preferably, a second hole is formed in the partition wall and located on the copper matte layer; and/or a third hole is formed in the partition wall and positioned on the smoke layer.
In addition, it is preferable that the second hole is disposed at a lower portion of the copper matte layer; the height of the second hole is 200-300 mm; the width of the second hole is 400-600 mm.
In addition, the preferable scheme is that the highest point of the first hole is 300-600 mm lower than the upper liquid level of the slag layer; the lowest point of the first hole is 100-300 mm lower than the bottom liquid line of the slag layer.
Furthermore, it is preferable that the partition wall is constructed of refractory bricks; the refractory bricks are magnesium-chromium refractory bricks.
In addition, it is preferable that the clear length of the settling zone is 2000mm to 5000mm.
In addition, it is preferable that the smoke outlet is arranged at one end of the smelting reaction zone close to the separating device or at one end of the smelting reaction zone far from the separating device.
In addition, a flue gas flow port is preferably formed between the top end of the copper water jacket and the top end of the furnace body; the flue gas circulation port is located in the flue gas layer.
In addition, the preferred scheme is that the two ends of the copper water sleeve in the direction of the through length are respectively arranged outside the furnace body, one end of the copper water sleeve is provided with a water inlet, and the other end of the copper water sleeve is provided with a water outlet.
In addition, preferably, a temperature raising spray gun is arranged below the settling zone at the bottom of the furnace body.
In addition, a preferable scheme is that a re-precipitation device is arranged inside the slag tap; the re-precipitation device comprises an inverted U-shaped copper water jacket arranged at the joint of the slag tap and the slag tapping end of the furnace body; the copper water jacket is arranged on the slag layer, and a fourth hole is formed in a refractory brick at the end part of the furnace body at the position of the inverted U-shaped copper water jacket; a slag hole is formed in a port of one end, far away from the furnace body, of the slag hole, and a second settling zone is formed between the slag hole and the fourth hole in the slag hole; and a heat-insulating cover and a heat-insulating burner are arranged at the top of the slag tap.
According to the technical scheme above, the utility model provides a reduce copper-containing bottom-blown smelting furnace of sediment separates into smelting reaction district and settling area with the furnace body inside through setting up separator, through set up the first hole that the position is reasonable on the partition wall or through the circulation mouth that forms between the bottom of copper water jacket and the furnace body bottom, can introduce the smelting sediment into the settling area with the smelting sediment, through deposiing in the settling area with the copper matte that is located the below return to the smelting reaction district from first hole or circulation mouth again, discharge from the copper mouth of putting of the other end at last to reduce copper content in the sediment, improve the direct yield of copper; the partition wall in the full-built mode is uniformly stressed, and the whole structure of the copper water jacket is firm and durable, so that the service life of the partition device can be prolonged; and the slag in the settling zone can be discharged in an overflowing way, the melt is calmer, and the slag is easy to discharge safely.
Drawings
Other objects and results of the invention will be more apparent and readily appreciated by reference to the following description taken in conjunction with the accompanying drawings, and as the invention is more fully understood. In the drawings:
FIG. 1 is a schematic structural diagram of a bottom blowing smelting furnace for reducing copper content in slag according to an embodiment of the present invention;
FIG. 2 is a side view of the structure of FIG. 1;
FIG. 3 is a schematic structural view of a bottom blowing smelting furnace with copper slag reduction according to another embodiment of the present invention;
FIG. 4 is a side view of the structure of FIG. 3;
fig. 5 is a schematic structural diagram of a re-deposition device according to an embodiment of the present invention;
FIG. 6 is a side view of the structure of FIG. 5;
fig. 7 is a schematic structural diagram of a copper water jacket according to an embodiment of the present invention;
fig. 8 is a side view of the structure of fig. 7.
In the attached figure, 1-furnace body, 11-slag hole, 111-slag hole, 12-copper hole, 13-charging hole, 14-smoke hole, 15-reaction spray gun, 16-smoke layer, 17-slag layer, 18-copper matte layer, 2-partition wall, 21-first hole, 22-second hole, 23-third hole, 31-smelting reaction zone, 32-settling zone, 4-copper water jacket, 41-fourth hole, 5-heat-insulating cover, 6-heat-insulating burner, 7-second settling zone, 8-copper water jacket, 81-circulation hole, 82-smoke circulation hole, 83-water inlet, 84-water outlet.
The same reference numbers in all figures indicate similar or corresponding features or functions.
Detailed Description
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that such embodiment(s) may be practiced without these specific details.
Aiming at the problems that the content of copper in slag obtained by the smelting furnace in the prior art is high and the like, the bottom blowing smelting furnace for reducing the content of copper in the slag is provided.
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
In order to illustrate the bottom-blowing smelting furnace for reducing copper content in slag provided by the utility model, fig. 1 shows the structure of the bottom-blowing smelting furnace for reducing copper content in slag according to the embodiment of the utility model; FIG. 2 shows the side view structure of FIG. 1; fig. 3 shows the structure of a bottom-blowing smelting furnace with reduced slag copper content according to another embodiment of the present invention; FIG. 4 shows the side view structure of FIG. 3; fig. 5 shows a structure of a re-deposition apparatus according to an embodiment of the present invention; FIG. 6 shows the side view structure of FIG. 5; fig. 7 shows a structure when a copper water jacket is used according to an embodiment of the present invention; fig. 8 shows the side view structure of fig. 7.
As shown in fig. 1 to 8, the bottom-blowing smelting furnace for reducing copper content in slag provided by the utility model comprises a furnace body 1 and a separating device; wherein, two ends of the furnace body 1 are respectively provided with a slag tap 11 and a copper tap 12, the top of the furnace body 1 is provided with a feed inlet 13 and a smoke outlet 14, and the bottom of the furnace body 1 is provided with a reaction spray gun 15; when materials are smelted, a flue gas layer 16, a slag layer 17 and a copper matte layer 18 are sequentially formed in the furnace body from top to bottom; the separating device comprises a separating wall 2 which is arranged inside the furnace body 1 and is close to one end provided with the slag tap 11, the separating wall 2 separates the inside of the furnace body 1 into a smelting reaction area 31 and a settling area 32, and the settling area 32 is close to the slag tap 11; a first hole 21 is formed in the interface between the slag layer 17 and the copper matte layer 18 on the partition wall 2, the highest point of the first hole 21 is lower than the upper liquid level of the slag layer 17, and the lowest point of the first hole 21 is lower than the bottom liquid level of the slag layer 17 and is arranged in the copper matte layer 18.
The interior of the furnace body 1 is divided into a smelting reaction area 31 and a settling area 32 by arranging a separating device, smelting slag can be introduced into the settling area 32 by arranging a first hole 21 with reasonable position on the partition wall 2 or by a flow port 81 formed between the bottom of the copper water jacket 8 and the bottom of the furnace body 1, copper matte positioned below is returned to the smelting reaction area 31 from the first hole 21 or the flow port 81 by precipitating in the settling area 32, and finally is discharged from a copper discharging port 12 at the other end, so that the copper content in the slag is reduced, and the direct yield of copper is improved; the partition wall 2 in the full-built mode is uniformly stressed, and the copper water jacket 8 is firm and durable in integral structure, so that the service life of the partition device can be prolonged; and the slag in the settling zone 32 can be discharged in an overflowing manner, the melt is calmer, and the slag is easy to discharge safely.
As a preferred embodiment of the present invention, a second hole 22 is provided on the partition wall 2 at the copper matte layer 18; and/or a third opening 23 is provided in the partition wall 2 in the flue gas layer 16. The return of the matte in the settling zone 32 to the smelting reaction zone 31 is facilitated by the second holes 22. The third holes 23 are beneficial to the intercommunication of the smoke in the settling zone 32 and the smoke in the smelting reaction zone 31, so that the smoke in the settling zone can return to the smelting reaction zone, and the temperature of the two zones is beneficial to the consistency when the two furnaces are dried.
As a preferred embodiment of the present invention, the second hole 22 is provided at the lower part of the copper matte layer 18; the height of the second holes 22 is 200 mm-300 mm; the width of the second hole 22 is 400mm to 600mm. This is the preferred size of the second hole, and when the volume of the furnace bottom is smaller, the first hole 21 and the second hole 22 can be communicated up and down and combined into one hole. It should be noted that the width of the first hole 21 is much smaller than the cross-sectional width of the furnace body 1, so that the partition wall 2 absorbs the stirring kinetic energy of the melt in the partial smelting reaction zone 31 wider than the hole of the first hole 21, the refractory bricks of the slag layer 17 gradually erode away a part of the refractory bricks as the production time increases, and the width of the first hole 21 gradually widens.
As a preferred embodiment of the utility model, the highest point of the first hole 21 is 300mm to 600mm lower than the upper liquid level of the slag layer 17; the lowest point of the first hole 21 is 100 mm-300 mm lower than the bottom liquid line of the slag layer 17. The highest point of the first holes 21 is lower than the melt slag level, and the purpose is as follows: the partition wall 2 is made to absorb the stirring kinetic energy of the melt in the partial smelting reaction zone 31 higher than the holes; secondly, raw materials floating in the slag layer 17 can be prevented from entering the settling zone 32, and the reduction of copper content in slag is facilitated; thirdly, as the production time is prolonged, the refractory bricks of the slag layer 17 are gradually eroded away.
As a preferred embodiment of the present invention, the partition wall 2 is built of refractory bricks; the refractory bricks are magnesium-chromium refractory bricks. The partition wall 2 is fully built by resistant firebrick, and the benefit is the even atress of resistant firebrick circumference, and structural strength is good, and the security is high. The service life of the partition wall 2 meets the requirements of factory overhaul, about 1 and a half years, and the partition wall 2 is built again when the service life is up.
As a preferred embodiment of the present invention, the clear length of the settling zone 32 is 2000mm to 5000mm. Can ensure the separation of copper and slag.
As a preferred embodiment of the present invention, the smoke outlet 14 is disposed at one end of the smelting reaction zone 31 close to the separating device or at one end of the smelting reaction zone 31 far from the separating device. I.e. the partition wall 2 may be provided at the furnace end portion on the non-outlet side or outside the outlet side, but in order to secure the life of the refractory bricks of the partition wall 2, the partition wall 2 is not generally provided on the path of the flue gas generated in the smelting reaction zone 31 to the outlet 14.
As a preferred embodiment of the present invention, a flue gas flow port 82 is formed between the top end of the copper water jacket 8 and the top end of the furnace body 1; flue gas flow port 82 is located in flue gas layer 16. Flue gas between smelting reaction zone 31 and settling zone 32 is communicated through flue gas flow openings 82.
As a preferred embodiment of the present invention, the two ends of the copper water jacket 8 in the through length direction are respectively disposed outside the furnace body 1, one end is provided with the water inlet 83, and the other end is provided with the water outlet 84. The copper water jacket 8 is cooled by circulating water. Among them, the shape of the flow opening 81 is an arch shape, which improves the structural strength of the copper water jacket.
As a preferred embodiment of the utility model, a temperature-raising spray gun is arranged below the bottom settling zone 32 of the furnace body 1. The bottom of the settling zone 32 can be provided with a small-sized spray gun, and the temperature is raised by spraying oxygen-enriched gas and natural gas so as to ensure that accretions are not formed.
As a preferred embodiment of the present invention, a re-precipitation device is disposed inside the slag hole 11; the re-precipitation device comprises a copper water jacket 4 arranged at the connection part of the slag discharge hole 11 and the slag discharge end of the furnace body 1; the copper water jacket 4 is arranged on the slag layer 17, and a fourth hole 41 is arranged on a refractory brick at the end part of the furnace body at the position of the inverted U-shaped copper water jacket; a slag hole 111 is arranged at the port of one end of the slag hole 11 far away from the furnace body 1, and a second settling zone 7 is formed between the slag hole 111 and the fourth hole 41 in the slag hole 11; and a heat-insulating cover 5 and a heat-insulating combustor 6 are arranged at the top of the slag hole. And further separating the slag copper through a re-precipitation device, and reducing the copper content in the slag again.
For better illustration of the bottom-blowing smelting furnace based on copper content reduction of slag provided by the present invention, the following specific examples are provided.
Example 1
For a furnace with the specification phi of 5.8 multiplied by 30m of the bottom blowing furnace, a slag layer in the furnace body is 600-800 mm, a copper matte layer is 800-1000 mm, and the total liquid level is 1600mm. The slag end is provided with a partition wall, the partition wall is formed by building magnesium-chromium refractory bricks, the thickness of the refractory bricks is 1000mm, the clear length of a settling zone is 4500mm, the partition wall is provided with a first hole in an interface zone of slag and copper matte, the width of the first hole is 600mm, the height of the first hole is 500mm, the highest point of the first hole is 400mm lower than the liquid level of a melt, a second hole is 600mm, the height of the second hole is 250mm, the uppermost part of the partition wall is provided with a third hole, and the diameter of the third hole is 500mm. The melt temperature is 1200 ℃, the copper matte grade is 72 percent, and Fe/SiO in the slag 2 = 1.8-2.0, the slag discharged from the settling zone contains 1.85% copper.
Example 2
For a furnace with the specification phi of 4.8 multiplied by 20m of the bottom blowing furnace, a slag layer in the furnace body is 500-700 mm, a copper matte layer is 700-900 mm, and the total liquid level height is 1400mm. The slag end is provided with a partition wall, the partition wall is formed by building magnesium-chromium refractory bricks, the thickness of the refractory bricks is 800mm, the net length of a settling zone is 3500mm, the partition wall is provided with a first hole in an interface zone of slag and copper matte, the width of the first hole is 500mm, the height of the first hole is 500mm, the highest point of the first hole is 300mm lower than the liquid level of a melt, a second hole is 500mm, the height of the second hole is 250mm, the uppermost part of the partition wall is provided with a third hole, and the diameter of the third hole is 400mm. The temperature of the melt is 1190 ℃, the copper matte grade is 71 percent, and Fe/SiO in the slag 2 = 1.8-2.0, settling zone rowThe copper content in the discharged slag is 1.5 percent.
Example 3
For a furnace with the specification of phi 3.8 multiplied by 15m of the bottom blowing furnace, a slag layer in the furnace body is 300-400 mm, a copper matte layer is 700-800 mm, and the total liquid level is 1100mm. The slag-end-near partition wall is formed by building magnesium-chromium refractory bricks, the thickness of the refractory bricks is 600mm, the net length of a settling zone is 2500mm, a first hole is formed in the partition wall in a slag-copper matte interface zone, the width of the first hole is 400mm, the height of the first hole is 500mm, the highest point of the first hole is 200mm lower than the liquid level of a melt, a second hole is formed in the bottommost part of the partition wall, the width of the second hole is 400mm, the height of the second hole is 400mm, the first hole and the second hole are communicated and combined to form a hole, the width of the first hole is 400mm, the height of the second hole is 900mm, a third hole is formed in the uppermost part of the partition wall, and the diameter of the third hole is 350mm. The temperature of the melt is 1180 ℃, the copper matte grade is 70 percent, and Fe/SiO in the slag 2 = 1.8-2.0, the slag discharged from the settling zone contains 1.75% of copper
According to the specific embodiment, the utility model provides a bottom-blowing smelting furnace capable of reducing copper content in slag separates the furnace body into a smelting reaction area and a settling area through setting up the separating device, through setting up the first hole that the position is reasonable on the partition wall or through the circulation mouth that forms between the bottom of copper water jacket and the furnace body bottom, can introduce the smelting slag into the settling area, through settling in the settling area to return the copper matte that is located below to the smelting reaction area from first hole or circulation mouth again, discharge from the copper tap hole of the other end at last to reduce copper content in the slag, improve the direct recovery rate of copper; the partition wall in the full-built form is uniformly stressed, and the whole structure of the copper water jacket is firm and durable, so that the service life of the partition device can be prolonged; and the slag in the settling zone can be discharged in an overflowing manner, the melt is calmer, and the slag is easy to discharge safely.
A bottom-blowing smelting furnace with reduced slag copper content according to the present invention has been described above by way of example with reference to the accompanying drawings. However, it should be understood by those skilled in the art that various modifications can be made to the bottom-blowing smelting furnace for reducing the copper content in the slag provided by the present invention without departing from the scope of the present invention. Therefore, the scope of the present invention should be determined by the content of the appended claims.
Claims (11)
1. A bottom blowing smelting furnace for reducing copper content in slag is characterized by comprising a furnace body and a separating device; wherein the content of the first and second substances,
a slag tap and a copper tap are respectively arranged at two ends of the furnace body, a charging opening and a smoke outlet are arranged at the top of the furnace body, and a reaction spray gun is arranged at the bottom of the furnace body; when materials are smelted, a flue gas layer, a slag layer and a copper matte layer are sequentially formed in the furnace body from top to bottom;
the separating device comprises a partition wall or a copper water jacket which is arranged inside the furnace body and is close to one end provided with the slag tap; the separation device separates the interior of the furnace body into a smelting reaction zone and a settling zone, and the settling zone is close to the slag tap;
when the partition device is a partition wall, the partition wall is a full-built partition wall, a first hole is formed in an interface between the slag layer and the copper matte layer on the partition wall, the highest point of the first hole is lower than the upper liquid level of the slag layer, and the lowest point of the first hole is lower than the bottom liquid line of the slag layer and is arranged in the copper matte layer;
when the separating device is a copper water jacket, the copper water jacket penetrates through the interior of the furnace body along the through length direction of the copper water jacket, a circulation port is formed between the bottom end of the copper water jacket and the bottom of the furnace body, and the upper end of the circulation port is higher than the bottom liquid line of the slag layer.
2. The bottom-blowing smelting furnace with reduced slag copper content according to claim 1, characterized by,
a second hole is formed in the partition wall and located on the copper matte layer; and/or the presence of a gas in the gas,
and a third hole is formed in the partition wall and positioned on the smoke layer.
3. The bottom-blowing smelting furnace with reduced slag copper content according to claim 2, characterized by,
the second hole is formed in the lower portion of the copper matte layer;
the height of the second hole is 200-300 mm;
the width of the second hole is 400-600 mm.
4. The bottom-blowing smelting furnace with reduced slag copper content according to claim 1, characterized by,
the highest point of the first hole is 300-600 mm lower than the upper liquid level of the slag layer;
the lowest point of the first hole is 100-300 mm lower than the bottom liquid line of the slag layer.
5. The bottom-blowing smelting furnace with reduced slag copper content according to claim 1, characterized by,
the partition wall is built by refractory bricks;
the refractory bricks are magnesium-chromium refractory bricks.
6. The bottom-blowing smelting furnace with reduced slag copper content according to claim 1, characterized by,
the net length of the settling zone is 2000 mm-5000 mm.
7. The bottom-blowing smelting furnace with reduced slag copper content according to claim 1, characterized by,
the smoke outlet is arranged at one end of the smelting reaction zone close to the separating device or at one end of the smelting reaction zone far away from the separating device.
8. The bottom-blowing smelting furnace with reduced slag copper content according to claim 1, characterized by,
a flue gas circulation port is formed between the top end of the copper water jacket and the top end of the furnace body;
the flue gas flow port is located in the flue gas layer.
9. The bottom-blowing smelting furnace with reduced slag copper content according to claim 1, characterized by,
the copper water jacket is arranged outside the furnace body at two ends in the direction of the full length respectively, one end of the copper water jacket is provided with a water inlet, and the other end of the copper water jacket is provided with a water outlet.
10. The bottom-blowing smelting furnace with reduced slag copper content according to claim 1, characterized by,
and a temperature-raising spray gun is arranged at the bottom of the furnace body below the settling zone.
11. The bottom-blowing smelting furnace with reduced slag copper content according to claim 1, characterized by,
a re-precipitation device is arranged inside the slag hole;
the re-precipitation device comprises an inverted U-shaped copper water jacket arranged at the joint of the slag tap and the slag tapping end of the furnace body; the copper water jacket is arranged on the slag layer, and a fourth hole is formed in a refractory brick at the end part of the furnace body at the position of the inverted U-shaped copper water jacket;
a slag hole is formed in a port of one end, far away from the furnace body, of the slag hole, and a second settling zone is formed between the slag hole and the fourth hole in the slag hole; and a heat-insulating cover and a heat-insulating combustor are arranged at the top of the slag discharging port.
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| CN202222122835.7U CN217868964U (en) | 2022-08-12 | 2022-08-12 | Bottom-blowing smelting furnace capable of reducing copper content in slag |
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| CN202222122835.7U CN217868964U (en) | 2022-08-12 | 2022-08-12 | Bottom-blowing smelting furnace capable of reducing copper content in slag |
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