CN220793832U - Continuous smelting furnace for tin-containing material and system for continuously producing metallic tin - Google Patents
Continuous smelting furnace for tin-containing material and system for continuously producing metallic tin Download PDFInfo
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- CN220793832U CN220793832U CN202322594009.7U CN202322594009U CN220793832U CN 220793832 U CN220793832 U CN 220793832U CN 202322594009 U CN202322594009 U CN 202322594009U CN 220793832 U CN220793832 U CN 220793832U
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- 238000003723 Smelting Methods 0.000 title claims abstract description 159
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 title claims abstract description 123
- 239000000463 material Substances 0.000 title claims abstract description 50
- 230000009467 reduction Effects 0.000 claims abstract description 110
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 75
- 239000003546 flue gas Substances 0.000 claims abstract description 75
- 238000004073 vulcanization Methods 0.000 claims abstract description 69
- 239000002893 slag Substances 0.000 claims abstract description 55
- 238000005192 partition Methods 0.000 claims abstract description 38
- 238000007599 discharging Methods 0.000 claims description 33
- 239000003638 chemical reducing agent Substances 0.000 claims description 22
- 238000005486 sulfidation Methods 0.000 claims description 21
- 238000011084 recovery Methods 0.000 claims description 17
- 239000000428 dust Substances 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 238000000746 purification Methods 0.000 claims description 9
- 239000002918 waste heat Substances 0.000 claims description 9
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 8
- 229910052717 sulfur Inorganic materials 0.000 claims description 8
- 239000011593 sulfur Substances 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 7
- 238000001704 evaporation Methods 0.000 claims description 6
- 230000008020 evaporation Effects 0.000 claims description 6
- 239000000446 fuel Substances 0.000 claims description 6
- 238000010079 rubber tapping Methods 0.000 claims description 5
- 230000004907 flux Effects 0.000 claims description 4
- 239000013049 sediment Substances 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 claims description 2
- 230000003647 oxidation Effects 0.000 claims description 2
- 238000007254 oxidation reaction Methods 0.000 claims description 2
- 238000007664 blowing Methods 0.000 abstract description 17
- 238000005485 electric heating Methods 0.000 abstract description 9
- 238000000926 separation method Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 13
- 239000000779 smoke Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000000155 melt Substances 0.000 description 7
- 238000005265 energy consumption Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 238000003860 storage Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 239000003500 flue dust Substances 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 238000007670 refining Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000010924 continuous production Methods 0.000 description 2
- 230000003009 desulfurizing effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000011112 process operation Methods 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- LPUQAYUQRXPFSQ-DFWYDOINSA-M monosodium L-glutamate Chemical compound [Na+].[O-]C(=O)[C@@H](N)CCC(O)=O LPUQAYUQRXPFSQ-DFWYDOINSA-M 0.000 description 1
- 235000013923 monosodium glutamate Nutrition 0.000 description 1
- 239000004223 monosodium glutamate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 1
- 229910052683 pyrite Inorganic materials 0.000 description 1
- 239000011028 pyrite Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- AFNRRBXCCXDRPS-UHFFFAOYSA-N tin(ii) sulfide Chemical compound [Sn]=S AFNRRBXCCXDRPS-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model provides a continuous smelting furnace for tin-containing materials and a system for continuously producing metallic tin. The tin-containing material continuous smelting furnace comprises a furnace body, wherein an inner cavity of the furnace body is divided into a side-blowing smelting area, an electric heating reduction area and a vulcanization volatilization area which are sequentially arranged, a first separation wall is arranged between the side-blowing smelting area and the electric heating reduction area, a second separation wall is arranged between the electric heating reduction area and the vulcanization volatilization area, a first channel is arranged at the bottom of the first separation wall, a second channel is arranged at the top of the second separation wall, and a third channel is arranged at the bottom of the second separation wall. The flue gas in the side-blown smelting area and the electrothermal reduction area is isolated through the first partition wall, the tin-rich slag flows into the electrothermal reduction area from the side-blown smelting area through the first channel for reduction smelting, the second channel is communicated with the flue gas in the two areas, the third channel discharges the low tin slag into the vulcanization volatilization area from the electrothermal reduction area for vulcanization volatilization treatment, and continuous smelting treatment of tin-containing materials is realized.
Description
Technical Field
The utility model relates to the technical field of smelting furnaces, in particular to a continuous smelting furnace for tin-containing materials and a system for continuously producing metallic tin.
Background
Tin plays an important role in national economic development, and is called industrial monosodium glutamate, and China is the world tin production and consumption state. With the rapid development of tin consumption related fields such as automobiles, buildings, electronic information and the like in recent years, the structure of products is continuously regulated, and the demand of China for tin is increasing.
For a long time, the method mainly adopts a fuming furnace vulcanization volatilization method for treating tin-containing materials, the method can not realize continuous production, only one furnace can be used for production, firstly, the tin-containing materials are added into the fuming furnace for melting, after stopping feeding, vulcanizing agents, generally pyrite, are added after the materials are completely melted for vulcanization volatilization, the volatilized tin is oxidized in the flue gas flow at the upper part of the fuming furnace in the form of tin sulfide, and finally the tin is recovered in the form of oxide through smoke dust.
In view of this, the present utility model has been made.
Disclosure of Invention
The utility model mainly aims to provide a device for continuously producing soldering tin materials, which solves the problem that the device for continuously producing soldering tin materials is not available in the prior art and can only be used for production in one furnace.
In order to achieve the above object, according to one aspect of the present utility model, there is provided a continuous smelting furnace for tin-containing materials, the smelting furnace comprising a furnace body, wherein an inner cavity of the furnace body is divided into a side-blown smelting zone, an electrothermal reduction zone and a vulcanization volatilization zone which are sequentially arranged, a first partition wall is arranged between the side-blown smelting zone and the electrothermal reduction zone, a second partition wall is arranged between the electrothermal reduction zone and the vulcanization volatilization zone, wherein a first channel is arranged at the bottom of the first partition wall, and the first channel is used for introducing tin-rich slag from the side-blown smelting zone to the electrothermal reduction zone; the top of second division wall is provided with the second passageway, and the second passageway is used for letting in the flue gas of electric heat reduction district into the vulcanization and volatilizees the district, and the bottom of second division wall still is provided with the third passageway, and the third passageway is used for discharging into the vulcanization and volatilizees the district with low tin sediment from the electric heat reduction district.
Further, a charging port is arranged at the top of the side-blown smelting zone, the charging port is used for adding tin-containing materials and solvents, and a smelting flue gas outlet is also arranged at the top of the side-blown smelting zone, and is used for discharging smelting flue gas; wherein, the smelting flue gas outlet is higher than the tin-containing material charging port.
Further, the side wall of the side-blown smelting zone is also provided with a first side blow opening for introducing carbonaceous fuel.
Further, an electrode is inserted in the electrothermal reduction zone, and a reducing agent charging port is arranged at the top of the electrothermal reduction zone, and at least one reducing agent charging port is arranged.
Further, the side wall of the voltage reduction zone is also provided with a metal outlet, and a third channel of the metal outlet is used for discharging crude tin.
Further, a vulcanization flue gas outlet is arranged at the top of the vulcanization volatilization zone; the side wall of the vulcanization volatilizing zone is also provided with a secondary seal, and the secondary seal is higher than the second channel and lower than the vulcanization flue gas outlet.
Further, the side wall of the vulcanization volatilizing zone is provided with a second side blowing opening, and the second side blowing opening is used for introducing a vulcanizing agent.
Further, the top of the vulcanization volatilizing zone is also provided with a slag discharging port and a bottom discharging port, and the slag discharging port is higher than the bottom discharging port.
According to another aspect of the present utility model, there is provided a system for continuously producing metallic tin, the system comprising a smelting device, an oxidation combustion device, a waste heat recovery device and a dust collection device connected in this order, wherein the smelting device is the smelting furnace provided in the first aspect.
Further, the dust collection and purification device is provided with a sulfur-containing flue gas outlet and a tin-containing flue gas outlet, and the sulfur-containing flue gas outlet is connected with an acid making system.
By means of the technical scheme, the tin-containing material continuous smelting furnace is provided with the first partition wall for isolating the side-blowing smelting area from the flue gas of the electric heating reduction area, tin-rich slag flows into the electric heating reduction area from the side-blowing smelting area through the first channel at the bottom of the first partition wall for reduction smelting, meanwhile, two areas of flue gas are communicated through the second channel arranged at the top of the second partition wall, and the third channel is arranged at the bottom of the second partition wall for discharging low tin slag into the vulcanization volatilization area from the electric heating reduction area for vulcanization volatilization treatment, so that continuous smelting treatment of tin-containing materials is realized, the occupied area is small, and construction investment of the furnace and factories is reduced.
In addition, the smelting furnace provided by the application combines the side-blowing smelting area, the electrothermal reduction area and the vulcanization volatilization area into a whole, reduces melt discharge and operation procedures, effectively improves production operation rate, and simultaneously reduces consumption of operators and corresponding appliances.
In addition, the smelting furnace provided by the application completes side-blown smelting, reduction smelting and vulcanization volatilization in one furnace body, the electrothermal reduction area maintains a certain temperature by utilizing the high temperature of a melt phase, reduces the energy consumption of independent reduction operation and vulcanization volatilization operation, simultaneously takes melting, reduction and volatilization operation into account, stores the melt in the furnace body in a relatively large amount, can increase the liquid storage time, and is further beneficial to improving the single-furnace processing capacity and the recovery rate of tin.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:
fig. 1 illustrates a cross-sectional view of a tin-containing material smelting furnace provided in accordance with some embodiments of the present utility model.
Wherein the above figures include the following reference numerals:
100. a side-blown smelting zone; 101. a feed inlet; 102. a smelting flue gas outlet; 103. a first side mouthpiece; 110. a first partition wall; 111. a first channel; 200. an electrothermal reduction zone; 201. a reducing agent feed port; 202. a metal discharge port; 210. a second partition wall; 211. a second channel; 220. an electrode; 212. a third channel; 300. a vulcanization volatilization zone; 301. a sulfidizing flue gas outlet; 302. a slag discharge port; 303. a bottom discharge port; 304. a secondary air port; 305. a second side blow port.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.
As analyzed in the background art of the application, the fuming furnace vulcanization volatilization method is mainly adopted for treating the tin-containing material for a long time, and the method can only produce the tin-containing material in one furnace, so that continuous production cannot be realized. To ameliorate this problem, the present application provides a continuous smelting furnace for tin-containing materials and a system for continuously producing metallic tin.
In a first exemplary embodiment of the present application, as shown in fig. 1, the present application provides a continuous smelting furnace for tin-containing materials, where the smelting furnace includes a furnace body, and the interior of the furnace body is divided into a side-blown smelting zone 100, an electrothermal reduction zone 200 and a vulcanization volatilization zone 300 that are sequentially arranged, a first partition wall 110 is arranged between the side-blown smelting zone 100 and the electrothermal reduction zone 200, and a second partition wall 210 is arranged between the electrothermal reduction zone 200 and the vulcanization volatilization zone 300, where a first channel 111 is arranged at the bottom of the first partition wall 110, and the first channel 111 is used for introducing tin-rich slag from the side-blown smelting zone 100 into the electrothermal reduction zone 200; the bottom of the second partition wall 210 is provided with a second channel 211, the second channel 211 is used for leading the flue gas of the electrothermal reduction zone 200 into the vulcanization volatilization zone 300, the bottom of the second partition wall 210 is also provided with a third channel 212, and the third channel 212 is used for discharging low tin slag from the electrothermal reduction zone 200 into the vulcanization volatilization zone 300.
In the application, tin-containing materials and fluxes are subjected to oxygen-enriched smelting in a side-blown smelting area 100 to form a molten pool, tin-rich slag flue gas is obtained, the tin-rich slag flows into an electrothermal reduction area 200 through a first channel 111, then coarse tin, low tin slag and flue gas are produced in the electrothermal reduction area 200 under the action of a reducing agent, the low tin slag enters a vulcanization volatilizing area 300 through a third channel 212 and is subjected to vulcanization volatilizing under the action of a vulcanizing agent and oxygen-enriched gas, and slag and flue gas are obtained.
By means of the technical scheme, the tin-containing material continuous smelting furnace is provided with the first partition wall 110 for isolating the side-blowing smelting area 100 from the flue gas of the electric heating reduction area 200, the tin-rich slag flows into the electric heating reduction area 200 from the side-blowing smelting area 100 through the first channel 111 at the bottom of the first partition wall 110 for reduction smelting, meanwhile, two areas of flue gas are communicated through the second channel 211 arranged at the top of the second partition wall, and the third channel 212 is arranged at the bottom of the second partition wall for discharging the low tin slag into the vulcanizing volatilization area 300 from the electric heating reduction area 200 for vulcanization volatilization treatment, so that continuous smelting treatment of the tin-containing material is realized, the occupied area is small, and construction investment of the furnace and factories is reduced.
In addition, the smelting furnace provided by the application combines the side-blown smelting area 100, the electrothermal reduction area 200 and the vulcanization volatilization area 300 into a whole, reduces melt discharge and operation procedures, effectively improves the production operation rate, and simultaneously reduces the consumption of operators and corresponding appliances.
In addition, the smelting furnace provided by the application completes side-blown smelting, reduction smelting and vulcanization volatilization in one furnace body, the electrothermal reduction area 200 maintains a certain temperature by utilizing the high temperature of a melt phase, reduces the energy consumption of independent reduction operation and vulcanization volatilization operation, simultaneously takes into account the melting, reduction and volatilization operation, stores the melt in the furnace body in a relatively large amount, can increase the liquid storage time, and is further beneficial to improving the single-furnace processing capacity and the recovery rate of tin.
In this application, the first channel 111 and the third channel 212 are both disposed below the bath level, and in some embodiments, the first partition wall 110 is inserted 100-300 mm below the bath level, and the specific depth may be set according to the process operation bath level; the third channel 212 is disposed above the interface between the slag phase region and the metal phase region of the electrothermal reduction region 200, so as to prevent coarse tin produced in the electrothermal reduction region 200 from entering the sulfidation evaporation region 300, and ensure that low tin slag produced in the electrothermal reduction region 200 can smoothly flow into the sulfidation evaporation region 300.
As shown in fig. 1, in some embodiments, a charging port 101 is disposed at the top of the side-blown smelting zone 100, the charging port 101 is used for charging tin-containing materials and solvent, and a smelting flue gas outlet 102 is further disposed at the top of the side-blown smelting zone 100, and the smelting flue gas outlet 102 is used for discharging flue gas generated by smelting; wherein, the smelting flue gas outlet 102 is higher than the tin-containing material outlet, so as to facilitate the subsequent recovery treatment of the smelting flue gas discharged from the side-blown smelting zone 100.
In other embodiments, the side wall of the side-blown smelting zone 100 is further provided with a first side-blow opening 103, which first side-blow opening 103 is used for introducing fuel into the side-blown smelting zone 100 for smelting of tin-containing material. In some embodiments, the first side lance 103 is positioned below the bath level and is connected to a lance through which carbonaceous fuel is introduced into the molten bath in the side-blown smelting zone 100.
In some embodiments, electroheat reduction zone 200 is intercalated with electrodes 220, and electrodes 220 are inserted below the level of the melt pool, thereby allowing electroheat reduction zone 200 to use electrodes 220 to supplement heat. The top of the electrothermal reduction zone 200 is provided with a reducing agent charging port 201 to charge reducing agent into the electrothermal reduction zone 200 through the reducing agent charging port 201 to mix with tin-rich slag for electrothermal reduction.
The number of the above-mentioned reducing agent charging holes 201 is not particularly limited, and at least one, preferably a plurality of reducing agent charging holes 201 are provided on both sides of the electrode 220, respectively.
In some embodiments, the hearth of the electrothermal reduction zone is lower in height and longer in length, a plurality of reducing agent charging ports 201 are arranged at the top, and a reducing agent spray gun can be arranged at the top or the side according to the requirement so as to strengthen the reduction effect.
To facilitate the separation of the crude tin for subsequent refining, in some embodiments, the bottom of the electroheat reduction zone 200 is also provided with a metal tap-off 202 through which the crude tin exits the smelting furnace into the refining process.
In some embodiments, as shown in fig. 1, a sulfidation flue gas outlet is disposed at the top of the sulfidation volatilizing zone 300, and a secondary air port 304 is disposed on the side wall of the sulfidation volatilizing zone 300, where the secondary air port 304 is higher than the second channel 211, so that the sulfidation flue gas generated in the sulfidation volatilizing zone 300 is burned and oxidized at the secondary air port 304, and the oxidized flue gas is discharged out of the smelting furnace through the sulfidation flue gas outlet for recycling.
In other embodiments, as shown in fig. 1, the sidewall of the vulcanization volatilization zone 300 is provided with a second side blow port 305, and the second side blow port 305 is used for introducing the vulcanizing agent. In some embodiments, the second side-port 305 is also positioned below the level of the bath and is connected to a lance through which a sulfiding agent is introduced into the sulfiding volatilization zone 300 for mixing with the low tin dross for sulfiding.
In other embodiments, as shown in fig. 1, the bottom of the vulcanization volatilizing zone 300 is further provided with a slag discharging port 302 and a bottom discharging port 303, wherein the slag discharging port 302 is used for discharging slag, the bottom discharging port 303 is used for emptying, and the slag discharging port 302 is higher than the bottom discharging port 303.
In this application, the flue gas export of side-blown smelting district, electric heat reduction zone and vulcanization volatilize district all is in furnace roof direction, because the produced flue gas volume in electric heat reduction zone is less, and same set of flue gas recovery processing device can be used to electric heat reduction zone and vulcanization volatilize district flue gas, and side-blown smelting district flue gas is recovery processing alone.
In addition, each part of the furnace body is cooled in different modes according to the need, so that the service life of the furnace body is prolonged.
In some embodiments, the hearth is longitudinally stepped and inclined to the sulfidation volatilizing zone and the side-blown smelting zone and electrothermal reduction zone hearth are transversely stepped and inclined to the metal tapping point to facilitate coarse tin tapping. The step height of the furnace bottom between the side-blowing smelting area and the electrothermal reduction area and between the electrothermal reduction area and the vulcanization volatilizing area can be set according to the requirement of the process operation liquid level height.
The continuous smelting furnace provided by the application has small occupied area, and configuration height difference is reduced; the construction investment of the furnace and the factory building is reduced; the operation of melt discharge and addition is reduced, the production operation rate is higher, and the consumption of operators and corresponding tools can be reduced; the melting, the reduction and the volatilization are completed in one furnace, and the electrothermal reduction area and the vulcanization volatilization area can also maintain a certain temperature by utilizing the high temperature of the melt phase, so that the energy consumption during the independent reduction operation and the vulcanization operation is reduced; the amount of the stored melt in the furnace is relatively large, the liquid storage time can be increased, and the single furnace treatment capacity and the tin recovery rate are improved.
In some embodiments, the method for continuously smelting tin-containing materials to produce metallic tin provided by the application comprises the following steps:
(1) Preparing tin-containing materials and fluxes, and adding the mixed materials into a side-blown smelting area 100 of a continuous smelting furnace through a charging opening 101;
(2) Smelting, desulfurizing and slagging the mixed material in a side-blown smelting area 100, discharging produced flue gas from a smelting flue gas outlet 102 at the top of the side-blown smelting area 100, recovering waste heat, collecting dust, purifying and then delivering the mixed material to an acid making system, wherein tin in the tin-containing material forms tin-rich slag;
(3) The tin-rich slag automatically flows into an electrothermal reduction zone 200 of a continuous smelting furnace for reduction through a first channel 111 between a side-blowing smelting zone 100 and the electrothermal reduction zone 200, a reducing agent is added through a reducing agent adding port arranged in the electrothermal reduction zone 200 by adopting a closed screw feeder, the electrothermal reduction zone 200 produces crude tin, low tin slag and smoke, the crude tin is discharged through a metal discharge port 202 arranged in the electrothermal reduction zone 200, the low tin slag enters a vulcanization volatilization zone 300 through a third channel 212 at the bottom of a second partition wall 210, and the smoke enters the vulcanization volatilization zone 300 through a second channel 211 at the top of the second partition wall 210;
(4) The low tin slag is vulcanized and volatilized in a vulcanization and volatilization area 300 by adopting a vulcanizing agent, slag and smoke are produced after volatilization, the slag is discharged from a slag discharge port 302 arranged in the vulcanization and volatilization area 300, and is piled up or sold after water quenching; the flue gas in the area is mixed with the flue gas in the electrothermal reduction area 200, and then burnt and oxidized at a secondary air port 304 arranged at the upper part of the vulcanization volatilizing area 300, and the subsequent flue gas is sent to an acid making system after waste heat recovery, dust collection and purification;
(5) The flue dust obtained in the side-blown smelting area 100 and the flue dust obtained in the vulcanization volatilizing area 300 are granulated together and then fed into the side-blown smelting area 100 for proportioning.
In a second exemplary embodiment of the present application, there is also provided a system for continuously producing metallic tin, the system including a smelting apparatus, a waste heat recovery apparatus, and a dust collection purification apparatus connected in sequence; wherein the smelting device is the smelting furnace provided in the first exemplary embodiment.
The system for continuously producing metallic tin provided by the application is characterized in that the smelting furnace is used for smelting tin-containing materials into crude tin and slag for recycling, and meanwhile, smoke dust generated in the smelting process is sequentially subjected to waste heat recovery and dust collection purification treatment through the waste heat recovery device and the dust collection purification device, and flue gas exhausted from the smelting furnace is subjected to recovery treatment, so that the environmental pollution is reduced, and the energy consumption is reduced.
In some embodiments, the dust collection and purification device is provided with a sulfur-containing flue gas outlet and a tin-containing flue gas outlet, wherein the sulfur-containing flue gas outlet is used for discharging the sulfur-containing outlet and conveying the sulfur-containing outlet to an acid making system for recycling, and the tin-containing flue gas outlet is used for discharging tin-containing flue gas, and then recycling the tin-containing flue gas as raw materials to the side-blown smelting zone 100.
The advantageous effects of the present application will be further described below with reference to examples.
Example 1
Fig. 1 is a cross-sectional view of a continuous smelting furnace for tin-containing materials provided in embodiment 1 of the present application, as shown in fig. 1, the smelting furnace includes a furnace body, the interior of the furnace body is divided into a side-blown smelting zone 100, an electrothermal reduction zone 200 and a vulcanization volatilization zone 300 which are sequentially arranged, a first partition wall 110 is arranged between the side-blown smelting zone 100 and the electrothermal reduction zone 200, a second partition wall 210 is arranged between the electrothermal reduction zone 200 and the vulcanization volatilization zone 300, wherein a first channel 111 is arranged at the bottom of the first partition wall 110, and the first channel 111 is used for introducing tin-rich slag from the side-blown smelting zone 100 into the electrothermal reduction zone 200; the bottom of the second partition wall 210 is provided with a second channel 211, the second channel 211 is used for leading the flue gas of the electrothermal reduction zone 200 into the vulcanization volatilization zone 300, the bottom of the second partition wall 210 is also provided with a third channel 212, and the third channel 212 is used for discharging low tin slag from the electrothermal reduction zone 200 into the vulcanization volatilization zone 300.
The continuous smelting furnace for tin-containing materials provided by the embodiment is provided with the first partition wall 110 for isolating the flue gas of the side-blowing smelting area 100 and the electrothermal reduction area 200, the first channel 111 at the bottom of the first partition wall 110 is used for enabling tin-rich slag to flow into the electrothermal reduction area 200 from the side-blowing smelting area 100 for reduction smelting, meanwhile, the second channel 211 is arranged at the top of the second partition wall for communicating the flue gas of the two areas, and the third channel 212 is arranged at the bottom of the second partition wall for discharging low tin slag into the vulcanization volatilization area 300 from the electrothermal reduction area 200 for vulcanization volatilization treatment, so that continuous smelting treatment of tin-containing materials is realized, the occupied area is small, and the construction investment of the furnace and factories is reduced.
In addition, the smelting furnace provided by the embodiment combines the side-blowing smelting area 100, the electrothermal reduction area 200 and the vulcanization volatilization area 300 into a whole, reduces melt discharge and operation procedures, effectively improves the production operation rate, and simultaneously reduces the consumption of operators and corresponding appliances.
In addition, the smelting furnace provided by the embodiment completes side-blown smelting, reduction smelting and vulcanization volatilization in one furnace body, the electrothermal reduction area 200 maintains a certain temperature by utilizing the high temperature of the melt phase, reduces the energy consumption of independently carrying out reduction operation and vulcanization volatilization operation, simultaneously takes the melting, reduction and volatilization operation into consideration, has relatively large melt storage quantity in the furnace body, can increase the liquid storage time, and is further beneficial to improving the single-furnace processing capacity and the recovery rate of tin.
In the present embodiment, the third channel 212 is disposed above the interface between the slag phase region and the metal phase region of the electrothermal reduction region 200 to block coarse tin produced in the electrothermal reduction region 200 from entering the sulfidation evaporation region 300, and to ensure that low tin slag produced in the electrothermal reduction region 200 can smoothly flow into the sulfidation evaporation region 300.
As shown in fig. 1, a charging port 101 is arranged at the top of the side-blown smelting area 100, the charging port 101 is used for charging tin-containing materials and solvents, a smelting flue gas outlet 102 is also arranged at the top of the side-blown smelting area 100, and the smelting flue gas outlet 102 is used for discharging flue gas generated by smelting; wherein, the smelting flue gas outlet 102 is higher than the tin-containing material outlet, so as to facilitate the subsequent recovery treatment of the smelting flue gas discharged from the side-blown smelting zone 100.
As shown in fig. 1, the side wall of the side-blown smelting zone 100 is further provided with a first side-blow opening 103, which first side-blow opening 103 is used for letting fuel into the side-blown smelting zone 100 for smelting of tin-containing material. In some embodiments, the first side lance 103 is connected to a lance through which carbonaceous fuel is introduced into the molten bath in the side-blown smelting zone 100.
In this embodiment, the electrode 220 is inserted into the electrothermal reduction region 200, so that the electrothermal reduction region 200 supplements heat with the electrode 220. The top of the electrothermal reduction zone 200 is provided with a reducing agent charging port 201 to charge reducing agent into the electrothermal reduction zone 200 through the reducing agent charging port 201 to mix with tin-rich slag for electrothermal reduction.
In the present embodiment, the number of the reducing agent charging ports 201 is plural, and the plural reducing agent charging ports 201 are provided on both sides of the electrode 220, respectively.
To facilitate the separation of the crude tin for subsequent refining, in some embodiments, the bottom of the electroheat reduction zone 200 is also provided with a metal tap-off 202 through which the crude tin exits the smelting furnace into the refining process.
As shown in fig. 1, in this embodiment, a sulfidation flue gas outlet is disposed at the top of the sulfidation volatilizing zone 300, and a secondary air port 304 is further disposed on the side wall of the sulfidation volatilizing zone 300, where the secondary air port 304 is higher than the second channel 211, so that sulfidation flue gas generated in the sulfidation volatilizing zone 300 is burned and oxidized at the secondary air port 304, and the oxidized flue gas is discharged out of the smelting furnace through the sulfidation flue gas outlet for recovery treatment.
In this embodiment, as shown in fig. 1, the side wall of the vulcanizing and volatilizing zone 300 is provided with a second side blowing opening 305, and the second side blowing opening 305 is connected with a spray gun, and the vulcanizing agent is introduced into the vulcanizing and volatilizing zone 300 through the spray gun to be mixed with the low tin slag for vulcanization.
In this embodiment, as shown in fig. 1, the bottom of the vulcanization volatilizing zone 300 is further provided with a slag discharging port 302 and a bottom discharging port 303, wherein the slag discharging port 302 is used for discharging slag, the bottom discharging port 303 is used for emptying, and the slag discharging port 302 is higher than the bottom discharging port 303.
Example 2
The embodiment provides a method for continuously smelting and producing metallic tin by tin-containing materials, wherein the continuous smelting of the tin-containing materials is carried out in a smelting furnace provided in the embodiment 1, and specifically comprises the following steps:
(1) Preparing tin-containing materials and fluxes, and adding the mixed materials into a side-blown smelting area 100 of a continuous smelting furnace through a charging opening 101;
(2) Smelting, desulfurizing and slagging the mixed material in a side-blown smelting area 100, discharging produced flue gas from a smelting flue gas outlet 102 at the top of the side-blown smelting area 100, recovering waste heat, collecting dust, purifying and then delivering the mixed material to an acid making system, wherein tin in the tin-containing material forms tin-rich slag;
(3) The tin-rich slag automatically flows into an electrothermal reduction zone 200 of a continuous smelting furnace for reduction through a first channel 111 between a side-blowing smelting zone 100 and the electrothermal reduction zone 200, a reducing agent is added through a reducing agent adding port arranged in the electrothermal reduction zone 200 by adopting a closed screw feeder, the electrothermal reduction zone 200 produces crude tin, low tin slag and smoke, the crude tin is discharged through a metal discharge port 202 arranged in the electrothermal reduction zone 200, the low tin slag enters a vulcanization volatilization zone 300 through a third channel 212 at the bottom of a second partition wall, and the smoke enters the vulcanization volatilization zone 300 through a second channel 211 at the top of the partition wall;
(4) The low tin slag is vulcanized and volatilized in a vulcanization and volatilization area 300 by adopting a vulcanizing agent, slag and smoke are produced after volatilization, the slag is discharged from a slag discharge port 302 arranged in the vulcanization and volatilization area 300, and is piled up or sold after water quenching; the flue gas in the area is mixed with the flue gas in the electrothermal reduction area 200, and then burnt and oxidized at a secondary air port 304 arranged at the upper part of the vulcanization volatilizing area 300, and the subsequent flue gas is sent to an acid making system after waste heat recovery, dust collection and purification;
(5) The flue dust obtained in the side-blown smelting area 100 and the flue dust obtained in the vulcanization volatilizing area 300 are granulated together and then fed into the side-blown smelting area 100 for proportioning.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. The utility model provides a continuous smelting furnace of tin-containing material, its characterized in that, the smelting furnace includes the furnace body, the inner chamber of furnace body is divided into side-blown smelting zone (100), electric heat reduction zone (200) and the vulcanization volatilize zone (300) that set gradually, be provided with first partition wall (110) between side-blown smelting zone (100) and electric heat reduction zone (200), be provided with second partition wall (210) between electric heat reduction zone (200) and vulcanization volatilize zone (300), wherein, the bottom of first partition wall (110) is provided with first passageway (111), first passageway (111) are used for leading into tin-rich sediment from side-blown smelting zone (100) electric heat reduction zone (200); the top of second partition wall (210) is provided with second passageway (211), second passageway (211) are used for with the flue gas of electric heat reduction zone (200) lets in vulcanization evaporation zone (300), the bottom of second partition wall (210) still is provided with third passageway (212), third passageway (212) are used for with low tin sediment follow electric heat reduction zone (200) are discharged vulcanization evaporation zone (300).
2. The continuous smelting furnace according to claim 1, characterized in that a charging port (101) is provided at the top of the side-blown smelting zone (100), the charging port (101) being used for charging tin-containing material and flux, a smelting flue gas outlet (102) being further provided at the top of the side-blown smelting zone (100), the smelting flue gas outlet (102) being used for discharging smelting flue gas;
wherein the smelting flue gas outlet (102) is higher than the tin-containing material feeding port (101).
3. The continuous smelting furnace according to claim 1, characterized in that the side wall of the side-blown smelting zone (100) is further provided with a first side blow (103), the first side blow (103) being for feeding carbonaceous fuel.
4. Continuous smelting furnace according to claim 1, characterized in that electrodes (220) are inserted in the electrothermal reduction zone (200), a reducing agent charging opening (201) is arranged at the top of the electrothermal reduction zone (200), and at least one reducing agent charging opening (201) is arranged.
5. Continuous smelting furnace according to claim 1, characterized in that the side wall of the electrothermal reduction zone (200) is further provided with a metal tapping opening (202), which metal tapping opening (202) is lower than the third channel (212) for tapping crude tin.
6. The continuous smelting furnace according to claim 1, characterized in that the top of the sulfidation volatilizing zone (300) is provided with a sulfidation flue gas outlet (301); the side wall of the vulcanization volatilization zone (300) is also provided with a secondary air port (304), and the secondary air port (304) is higher than the second channel (211) and lower than the vulcanization flue gas outlet (301).
7. Continuous smelting furnace according to claim 1, characterized in that the side wall of the sulfidation volatilizing zone (300) is provided with a second side blow port (305), the second side blow port (305) being for introducing sulfiding agent.
8. Continuous smelting furnace according to claim 1, characterized in that the bottom of the sulfidation volatilizing zone (300) is further provided with a slag discharge opening (302) and a bottom discharge opening (303), the slag discharge opening (302) being higher than the bottom discharge opening (303).
9. A system for continuously producing metallic tin, characterized in that the system comprises a smelting device, an oxidation combustion device, a waste heat recovery device and a dust collection purification device which are sequentially connected, wherein the smelting device is the smelting furnace of any one of claims 1 to 8.
10. The system of claim 9, wherein the dust collection and purification device is provided with a sulfur-containing flue gas outlet and a tin-containing flue gas outlet, and the sulfur-containing flue gas outlet is connected with an acid making system.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117053556A (en) * | 2023-09-22 | 2023-11-14 | 中国恩菲工程技术有限公司 | Continuous smelting furnace for tin-containing material, and system and method for continuously producing metallic tin |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117053556A (en) * | 2023-09-22 | 2023-11-14 | 中国恩菲工程技术有限公司 | Continuous smelting furnace for tin-containing material, and system and method for continuously producing metallic tin |
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