CN214881767U - High-efficient dilution reduction device of nickel smelting sediment - Google Patents
High-efficient dilution reduction device of nickel smelting sediment Download PDFInfo
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- CN214881767U CN214881767U CN202121271506.8U CN202121271506U CN214881767U CN 214881767 U CN214881767 U CN 214881767U CN 202121271506 U CN202121271506 U CN 202121271506U CN 214881767 U CN214881767 U CN 214881767U
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- nickel
- reduction
- nickel smelting
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 195
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 104
- 238000003723 Smelting Methods 0.000 title claims abstract description 95
- 230000009467 reduction Effects 0.000 title claims abstract description 78
- 239000013049 sediment Substances 0.000 title claims abstract description 17
- 238000010790 dilution Methods 0.000 title claims description 67
- 239000012895 dilution Substances 0.000 title claims description 67
- 239000007921 spray Substances 0.000 claims abstract description 30
- 230000001603 reducing effect Effects 0.000 claims abstract description 19
- 239000002893 slag Substances 0.000 claims description 115
- 239000000155 melt Substances 0.000 claims description 37
- 239000000779 smoke Substances 0.000 claims description 27
- 238000001816 cooling Methods 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 238000007664 blowing Methods 0.000 claims description 18
- 238000007599 discharging Methods 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 239000010439 graphite Substances 0.000 claims description 4
- 229910002804 graphite Inorganic materials 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 239000011819 refractory material Substances 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000006722 reduction reaction Methods 0.000 description 63
- 238000000034 method Methods 0.000 description 15
- 230000008569 process Effects 0.000 description 15
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 14
- 239000001301 oxygen Substances 0.000 description 14
- 229910052760 oxygen Inorganic materials 0.000 description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 12
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 9
- 239000003546 flue gas Substances 0.000 description 9
- 239000012141 concentrate Substances 0.000 description 8
- 239000003638 chemical reducing agent Substances 0.000 description 7
- 239000003245 coal Substances 0.000 description 7
- 230000008676 import Effects 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 6
- 239000003345 natural gas Substances 0.000 description 6
- WWNBZGLDODTKEM-UHFFFAOYSA-N sulfanylidenenickel Chemical compound [Ni]=S WWNBZGLDODTKEM-UHFFFAOYSA-N 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000005352 clarification Methods 0.000 description 3
- 238000004200 deflagration Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000004868 gas analysis Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000010791 quenching Methods 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 230000009469 supplementation Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 229910001208 Crucible steel Inorganic materials 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- YFLLTMUVNFGTIW-UHFFFAOYSA-N nickel;sulfanylidenecopper Chemical compound [Ni].[Cu]=S YFLLTMUVNFGTIW-UHFFFAOYSA-N 0.000 description 2
- 238000011946 reduction process Methods 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 239000004071 soot Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229910052839 forsterite Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- -1 meanwhile Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000009853 pyrometallurgy Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The utility model discloses a high-efficient reduction device that impounds of nickel smelting sediment, the device include the furnace body, the furnace body is inside to set gradually the fuse-element accepting region and to impound the reducing zone, the fuse-element accepting region communicates each other with the impoundment reducing zone, furnace body upper portion sets up first receiving port, second receiving port, charge door and outlet flue, set up the electrode on the furnace body, set up the side-blown spray gun on the furnace body lateral wall, first receiving port and second receiving port with the fuse-element accepting region is corresponding, charge door and outlet flue with it is corresponding to impound the reducing zone, the electrode corresponds the setting and is in the impoundment reducing zone, the side-blown spray gun with the fuse-element accepting region with impoundment reducing zone intercommunication. The utility model discloses can solve the nickeliferous high, the electric stove of present nickel smelting technology sediment and handle the problem that load is high, the energy consumption is high when nickel smelting sediment alone.
Description
Technical Field
The utility model relates to the technical field of metallurgy, in particular to a high-efficient dilution reduction device of nickel smelting sediment.
Background
Traditional pyrometallurgy of nickel sulfide concentrates mainly refers to a process for smelting nickel sulfide concentrates to high-nickel matte, and generally comprises two steps of smelting and converting, wherein the smelting process mainly comprises a molten bath smelting process and a flash smelting process, and the converting process mainly comprises a P-S converter converting process and a top blowing converting process.
The nickel smelting process comprises closed blast furnace smelting, electric furnace smelting, oxygen-enriched top-blown furnace smelting, oxygen-enriched side-blown furnace smelting, flash smelting and the like.
Most smelting furnaces adopt oxygen-enriched strong oxidation smelting to enable nickel sulfide concentrate to react with oxygen rapidly, so that the oxygen potential of smelting slag is high, the nickel content in the slag is high, electric furnaces are arranged in production systems to further thin smelting slag, and the nickel content in the slag is reduced.
After the nickel sulfide concentrate with high magnesium oxide content is smelted, slag enters an electric furnace for dilution. The refractory iron forsterite and magnetic iron in the slag increase the viscosity and melting point of the slag, thereby reducing the fluidity of the slag and having poor dynamic conditions in the furnace. The magnetic iron causes a diaphragm layer to be formed between slag layers, and the slag layers are seriously bonded.
Because the density of the smelting slag is different from that of the reducing agent, the reducing agent is easy to float on the surface of the slag, the utilization rate of the reducing agent is low, and the reducing effect is poor.
The problems worsen the condition of electric furnace slag matte clarification and separation and increase the loss of nickel and copper.
SUMMERY OF THE UTILITY MODEL
To the technical problem, the utility model provides a high-efficient reduction device that imports of nickel smelting sediment, to the nickeliferous high of present nickel smelting technology sediment, problem that load is high, the energy consumption is high when the electric stove handles nickel smelting sediment alone.
In order to achieve the above object, the technical solution of the present invention is specifically as follows:
the nickel smelting slag efficient dilution reduction device comprises a furnace body, wherein a melt receiving area and a dilution reduction area are sequentially arranged in the furnace body, the melt receiving area is communicated with the dilution reduction area, a first receiving port, a second receiving port, a feeding port and a smoke outlet are arranged at the upper part of the furnace body, an electrode is arranged on the furnace body, a side-blowing spray gun is arranged on the side wall of the furnace body, the first receiving port and the second receiving port correspond to the melt receiving area, the feeding port and the smoke outlet correspond to the dilution reduction area, the electrode is correspondingly arranged in the dilution reduction area, and the side-blowing spray gun is communicated with the melt receiving area and the dilution reduction area.
The lower part of one end of the furnace body is provided with a low-nickel matte discharge port, the lower part of the other end of the furnace body is provided with a slag discharge port, the low-nickel matte discharge port is correspondingly communicated with the melt receiving area, and the slag discharge port is correspondingly communicated with the dilution reduction area.
The slag discharge port is an overflow type slag discharge port.
The first receiving opening and the second receiving opening are made of unshaped refractory materials or graphite.
The electrode is a self-baking electrode of a star-shaped wiring of the transformer.
The side-blown spray gun is a straight-through spray gun.
The furnace body is of a horizontal furnace type, and the melt receiving area and the dilution reducing area are arranged along the length direction of the furnace body.
The hearth height of the melt receiving zone coincides with the hearth height of the depletion reduction zone.
The furnace top of the furnace body is provided with 2 to 3 smoke outlets.
And the furnace top of the furnace body is provided with a water jacket water-cooling beam.
The utility model has the advantages that: the utility model provides a nickel smelting slag efficient dilution reduction device, which is an integrated device, the nickel smelting slag efficient dilution reduction device comprises a furnace body, a melt receiving area is arranged in the furnace body in sequence, the melt receiving area is provided with a first receiving port and a second receiving port, the first receiving port is used for adding converter slag into the melt receiving area, and the second receiving port is used for adding smelting slag into the melt receiving area; the dilution reduction area is communicated with the melt receiving area and is provided with an electrode, a side-blowing spray gun, a feeding port and a smoke outlet, and the dilution reduction area is used for efficient dilution reduction of the nickel smelting slag to produce the depleted slag and low-nickel matte. The utility model discloses an integrated device, nickel smelting slag high efficiency impoverishment reduction unit include the furnace body, and the furnace body is inside to be provided with the fuse-element receiving area in proper order, and the fuse-element receiving area has first receiving port, second receiving port, and first receiving port is used for to add the converter slag in the fuse-element receiving area, the second receiving port is used for to add the smelting slag in the fuse-element receiving area; the dilution reduction area is communicated with the melt receiving area and is provided with an electrode, a side-blowing spray gun, a feeding port and a smoke outlet. Spraying reducing substances into the side-blown spray gun, homogenizing heat distribution in the electric furnace by supplying heat and stirring proper melt, melting and bonding, increasing effective volume and settling time of the electric furnace, and reducing the content of valuable metals in the nickel smelting slag by using a physical means; by the oxygen-deficient combustion of the spray gun, the furnace is realizedThe inner reducing atmosphere is used for NiO and Fe in the nickel smelting slag304The strengthening reduction is realized, and the valuable metal contained in the nickel smelting slag is reduced by a chemical means. Adopt the utility model provides a high-efficient reduction device that imports of nickel smelting sediment can realize that the high efficiency of nickel smelting sediment imports the reduction in the electric stove, and it is low that the smelting sediment is nickeliferous, imports the process load little, and the energy consumption is low. Adopt the utility model provides a high-efficient dilution reduction device of nickel smelting sediment can be smelted in the molten bath and the supporting use in the flash smelting system, and application range is wide, and economic nature is high.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein, 1, a furnace body; 2. a water jacket water-cooling beam; 3. a first receiving port; 4. a second receiving port; 5. a feed inlet; 6. a smoke outlet; 7. an electrode; 8. a depletion reduction zone; 9. a slag discharge port; 10. a side-blown spray gun; 11. a low nickel matte vent; 12. a melt receiving zone.
Detailed Description
As shown in figure 1, the nickel smelting slag efficient dilution reduction device comprises a furnace body 1, wherein a melt receiving area 12 and a dilution reduction area 8 are sequentially arranged in the furnace body 1, the melt receiving area 12 and the dilution reduction area 8 are communicated with each other, a first receiving port 3, a second receiving port 4, a feeding port 5 and a smoke outlet 6 are arranged at the upper part of the furnace body 1, an electrode 7 is arranged on the furnace body 1, a side-blowing spray gun 10 is arranged on the side wall of the furnace body 1, the first receiving port 3 and the second receiving port 4 correspond to the melt receiving area 12, the feeding port 5 and the smoke outlet 6 correspond to the dilution reduction area 8, the electrode 7 is correspondingly arranged in the dilution reduction area 8, and the side-blowing spray gun 10 is communicated with the melt receiving area 12 and the dilution reduction area 8.
As shown in figure 1, the lower part of one end of the furnace body 1 is provided with a low-nickel matte discharge port 11, the lower part of the other end of the furnace body 1 is provided with a slag discharge port 9, the low-nickel matte discharge port 11 is correspondingly communicated with a melt receiving area 12, and the slag discharge port 9 is correspondingly communicated with the dilution reduction area 8.
As shown in fig. 1, the slag discharge port 9 is an overflow type slag discharge port.
As shown in fig. 1, the material of the first receiving opening 3 and the second receiving opening 4 is amorphous refractory or graphite.
As shown in fig. 1, the electrode 7 is a self-baking electrode of a star connection of a transformer.
As shown in fig. 1, the side-blowing lance 10 is a straight-through lance.
The furnace body 1 is a horizontal furnace type, and the melt receiving area 12 and the dilution reducing area 8 are arranged along the length direction of the furnace body 1.
As shown in fig. 1, the melt receiving zone 12 has a hearth height that coincides with the hearth height of the depletion reduction zone 8.
As shown in fig. 1, 2 to 3 smoke outlets 6 are provided in the furnace top of the furnace body 1.
As shown in fig. 1, a water jacket water-cooling beam 2 is provided on the ceiling of a furnace body 1.
The utility model discloses in the actual production process, nickel smelting slag is through first receiving port 3, this device of 4 entering of second receiving port, high temperature clarification effect through electrode 7, improve nickel smelting slag temperature, through reinforced, mouth 5 adds reductant or vulcanizer, participate in the vulcanization, reduction reaction, spout 10 through side-blown, to the slag blanket natural gas or fine coal of drum-in, increase molten bath kinetic condition, the side is to the molten bath concurrent heating, make the stove heat more even in, solve the not enough problem of electrode blind spot heat, on the other hand spouts 10 under oxygen burning through side-blown, realize the reducing atmosphere in the stove, NiO and Fe in the nickel smelting slag in order to expect304The strengthening reduction is realized, the valuable metal content of the nickel smelting slag is effectively reduced, and the nickel content of the slag is about 0.08-0.2%.
In a word, the utility model provides a high-efficient reduction device that imports of nickel smelting sediment has effectively solved the problem that load is high, the energy consumption is high when current nickel smelting imports the nickeliferous height of technology sediment, electric stove independent processing nickel smelting sediment. The nickel smelting slag enters the furnace through the receiving port, the electrode heats the melt, the high-temperature clarification is realized, the side-blown spray gun effectively improves the temperature and the slag dilution is realized, the production is stable, the dilution effect is good, and the nickel content of the slag is low.
In a preferred embodiment, the melt receiving area 12 can receive nickel slag such as converter slag or smelting slag and can process various types of nickel smelting slag, and the dilution reduction area 8 is used for efficient dilution reduction of the nickel smelting slag to produce the depleted slag and low-nickel matte and is provided with an electrode 7, a side-blowing lance 10, a charging opening 5 and a smoke outlet 6.
In a preferred embodiment, two end walls of the furnace body 1 of the high-efficiency nickel smelting slag dilution and reduction device are respectively provided with a low-nickel matte discharge port 11 and a slag discharge port 9, and the side wall can also be provided with the low-nickel matte discharge port 11 according to the nickel smelting slag treatment capacity. Because the nickel content of the waste slag is less than or equal to 0.2 percent, the waste slag can be directly treated, and more preferably, the waste slag can be treated by steel ladle hauling, a water quenching process and a wind quenching process.
In order to further improve the stability of the liquid level and the safety of the device, the slag discharging port 9 of the high-efficiency nickel smelting slag dilution reduction device can be arranged as an overflow type slag discharging port, and natural gas above the slag discharging port keeps warm.
In a preferred embodiment, the melt receiving zone 12 of the high-efficiency nickel slag depletion reduction apparatus is equipped with receiving openings based on melt properties. More preferably, the first receiving opening 3 and the second receiving opening 4 are made of cast steel, and the nickel smelting slag receiving opening is made of amorphous refractory pouring or graphite and can be continuously fed or discontinuously fed.
In a preferred embodiment, the electrode 7 of the nickel smelting slag efficient dilution reduction device passes through the furnace body 1 to the dilution reduction zone 8, and the electrodes 7 are arranged in a plurality of, more preferably, the electrodes 7 are self-baking electrodes, star-shaped connection of transformers and regular triangle arrangement.
In a preferred embodiment, a plurality of side-blowing lances 10 are arranged at the positions of the first side wall and the second side wall of the furnace body 1 of the high-efficiency nickel smelting slag dilution and reduction device. More preferably, the side-blowing lance 10 is a straight-through lance, the side-blowing lance 10 is disposed at a high level in the sidewall slag layer, and the side-blowing lance 10 injects reducing substances such as pulverized coal and oxygen-enriched air or (natural gas and oxygen-enriched air) at a high speed.
In order to further improve the safety of the high-efficiency nickel smelting slag dilution and reduction device and avoid serious accidents such as furnace leakage, the side-blown spray gun 10 is provided with a gun seat water jacket, the spray gun is inserted into the gun seat water jacket, and the outside of the spray gun is fixed by a mounting seat, so that the cooling strength of the side-blown spray gun is improved.
In a preferred embodiment, the furnace body 1 of the nickel smelting slag high-efficiency dilution and reduction device is a horizontal furnace type, the melt receiving area 12 and the dilution and reduction area 8 are arranged along the length direction of the furnace body, and the furnace body 1 is provided with furnace wall water jackets to be tightly matched with bricks.
In a preferred embodiment, the nickel smelting slag high-efficiency dilution and reduction device is provided with a feed inlet 5, the feed inlet 5 penetrates through the furnace body to enter a melt receiving area 12 and a dilution and reduction area 8, and a vulcanizing agent and a reducing agent are added into the feed inlet 5. More preferably, the vulcanizing agent can adopt ultra-rich ore and nickel concentrate.
In a preferred embodiment, the nickel smelting slag efficient dilution reduction device is provided with 2 to 3 smoke outlets 6, the smoke outlets 6 penetrate through the furnace body and enter a dilution reduction zone 8, smoke in the nickel smelting slag dilution reduction process is discharged by the smoke outlets 6, the temperature of the smoke is 900-. More preferably, the flue gas cooling device can utilize an outer water jacket type water cooling flue or a membrane wall water cooling flue.
In a preferred embodiment, in an embodiment not shown in the figure, a CO gas analysis alarm and an interlocking device are arranged at the rear end of the flue gas cooling device and are used for CO alarm and flue oxygen supplementation to solve the deflagration problem of escaping CO.
In a preferred embodiment, the water jacket water-cooling beam 2 is arranged on the furnace top of the nickel smelting slag high-efficiency dilution reduction device and is used for cooling the furnace top.
In a preferred embodiment, the front process of the nickel smelting slag efficient dilution and reduction device can be provided with a top-blown furnace or a flash furnace, and the slag can automatically flow into the nickel smelting slag efficient dilution and reduction device through a chute to realize the efficient dilution and reduction of the slag.
The present application is described in further detail below with reference to specific examples, which should not be construed as limiting the scope of the invention as claimed.
Example 1.
The structure of the nickel smelting slag efficient dilution reduction device is shown in fig. 1, and specifically comprises the following steps:
the length of the slag line of the furnace body 1 is 28000mm, the width is 8000mm, the height of the furnace chamber is 5500mm, the liquid level height of the low nickel matte is 750mm, and the thickness of the slag layer is 13500 mm. Melt receiving area 12 sets up 5 receiving ports, and low-nickel matte discharge port 11 sets up 5, and highly 420mm, wherein sets up 2 near the headwall of melt receiving area 12, and the side wall sets up 3. The slag discharge port 9 is arranged on the other end wall far away from the melt receiving area, the slag is discharged by using a weir port, a natural gas spray gun above the weir port keeps warm, the weir port is kept smooth, and the slag is treated by a slag water quenching process.
The electrodes 7 are arranged into 3 groups, each group of 3 electrodes with the diameter of 1000mm are arranged in a star shape, and the maximum power of each group of electrodes is 15000 kVA.
The side walls are respectively provided with 6 natural gas (pulverized coal spray guns) stirring molten pools, the height of each spray gun is 1600mm, and the side-blowing spray gun 10 is arranged in a mode of avoiding the electrode 7. The side-blown spray gun 10 is composed of a gun base water jacket, a pipe base and a spray gun, and eliminates the hidden trouble of melt leakage.
The high-efficiency dilution reduction device for the nickel smelting slag is provided with 2 smoke outlets 6, the smoke outlets 6 penetrate through the furnace body 1 and enter a dilution reduction area 8, smoke in the dilution reduction process of the nickel smelting slag is discharged through the smoke outlets 6, the smoke temperature is 900-plus-1100 ℃, the smoke is cooled through a cooling device such as an outer water jacket type water cooling flue or a membrane wall water cooling flue, the smoke temperature is reduced to 280-plus-380 ℃, then the smoke enters an electric dust collector for dust removal, and is purified and emptied through acid making. A CO gas analysis alarm instrument and an interlocking device are arranged at the rear end of the flue gas cooling device and used for CO alarming and flue oxygen supplementation, and the problem of CO deflagration loss is solved.
The water jacket water-cooling beam 2 is arranged on the furnace top to cool the furnace top, so that the hidden danger that the buried pipe of the H-shaped water-cooling beam is easy to leak is eliminated.
The nickel sulfide concentrate is smelted by utilizing the high-efficiency dilution reduction device for the nickel smelting slag, and the specific technological process is as follows:
(1) and (4) batching nickel-copper sulfide concentrate. After nickel-copper sulfide bulk concentrate (containing Ni more than or equal to 6 percent), quartz stone flux, limestone flux, selected raw coal, soot and the like are proportioned by a disc and a quantitative feeder, the proportioned raw coal, the soot and the like are transported to the top of a smelting furnace by a belt conveyor and are added into the furnace by a movable belt conveyor. The smelting furnace produces low-nickel matte Ni 20-25%, Cu 10-15%, Fe 25-30%, S22-28%, and the operation temperature is 1230-1250 ℃. The content of Fe/SiO2 in the nickel smelting slag is 0.9-1.1%, the content of Ni1.2-2.5% in the slag, the content of MgO 10-14% in the slag and the temperature of the slag is 1250-1300 ℃. The temperature of the smelting flue gas is 1000-1300 ℃, and the smelting flue gas is sent to a flue gas treatment system for treatment.
(2) After the low-nickel matte is blown by a horizontal converter, high-nickel matte Ni 40-50%, Cu 25-30% and Fe 2-3.5% are generated, and the operation temperature is 1200-1300 ℃. The nickel converter slag contains Ni 1-4% and has a slag temperature of 1200-1300 deg.C.
(3) The low-nickel matte of the smelting furnace is sent to a converter for converting through a ladle and a metallurgical crane, and the nickel smelting slag automatically flows to a high-efficiency dilution reduction device of the nickel smelting slag through a chute. Part of low-nickel matte of the nickel smelting furnace automatically flows to the high-efficiency dilution and reduction device of the nickel smelting slag through the chute. The nickel converter slag is transported to the top of the nickel smelting slag efficient dilution reduction device through a ladle and a metallurgical crane, and automatically flows to the nickel smelting slag efficient dilution reduction device through a cast steel chute.
(4) The nickel smelting slag, the converter slag and part of low-nickel matte enter a melt receiving area 12, the temperature of the melt is increased through electrodes in a dilution reducing area 8, lump coal and silicon carbide are properly added into a material pipe to serve as reducing agents, meanwhile, natural gas (or pulverized coal) and oxygen-enriched air are blown into a side-blowing spray gun 10 to stir a molten pool, the dynamic condition of the molten pool is increased, and the utilization rate of the reducing agents is increased. Because the side-blowing spray gun 10 is arranged in the area far away from the electrode 7, the side-blowing spray gun 10 can control the oxygen concentration, and heat is supplemented for the low-temperature area to prevent the melt from bonding.
(5) The chemical loss and physical loss nickel matte particles are smoothly settled to the furnace bottom through the device to form low nickel matte, Ni 22-27%, Cu 12-17%, Fe 25-30%, S22-28% and the operation temperature is 1250-1280 ℃. The nickel content of the nickel smelting slag after the high-efficiency dilution reduction is 0.08 to 0.2 percent, and the operation temperature is 1350 to 1450 ℃.
(6) The smoke temperature of the nickel smelting slag efficient dilution reduction device is 900-1100 ℃, the water jacket water-cooling beam 2 is arranged on the furnace top, and the furnace top is cooled, so that the safety of the furnace top is improved. After the high temperature is cooled by the outer water jacket flue and the membrane wall flue, the temperature of the flue gas is 280-380 ℃, and the flue gas enters a dust collection device. A CO gas analysis alarm instrument and an interlocking device are arranged at the rear end of the flue gas cooling device and used for CO alarming and flue oxygen supplementation, and the problem of CO deflagration loss is solved.
The technical scheme provided by the utility model is introduced in detail above. The specific principles and embodiments are used herein for illustration, and the above description of the embodiments is only used to help understand the structure and the core idea of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (10)
1. The high-efficient dilution reduction device of nickel smelting sediment, its characterized in that: comprises a furnace body (1), a melt receiving area (12) and a dilution reducing area (8) are sequentially arranged in the furnace body (1), the melt receiving area (12) is communicated with the dilution reducing area (8), the upper part of the furnace body (1) is provided with a first receiving port (3), a second receiving port (4), a charging port (5) and a smoke outlet (6), the furnace body (1) is provided with an electrode (7), the side wall of the furnace body (1) is provided with a side-blown spray gun (10), the first receiving opening (3) and the second receiving opening (4) correspond to the melt receiving area (12), the feed inlet (5) and the smoke outlet (6) correspond to the depletion and reduction area (8), the electrode (7) is correspondingly arranged in the dilution reduction zone (8), and the side-blowing lance (10) is communicated with the melt receiving zone (12) and the dilution reduction zone (8).
2. The efficient nickel smelting slag depletion and reduction plant of claim 1, characterized in that: the low-nickel matte discharging port (11) is arranged at the lower part of one end of the furnace body (1), the slag discharging port (9) is arranged at the lower part of the other end of the furnace body (1), the low-nickel matte discharging port (11) is correspondingly communicated with the melt receiving area (12), and the slag discharging port (9) is correspondingly communicated with the dilution reducing area (8).
3. The efficient nickel smelting slag depletion and reduction plant of claim 2, characterized in that: the slag discharge port (9) is an overflow type slag discharge port.
4. The efficient nickel smelting slag depletion and reduction plant of claim 1, characterized in that: the materials of the first receiving opening (3) and the second receiving opening (4) are amorphous refractory materials or graphite.
5. The efficient nickel smelting slag depletion and reduction plant of claim 1, characterized in that: the electrode (7) is a self-baking electrode of a star-shaped wiring of the transformer.
6. The efficient nickel smelting slag depletion and reduction plant of claim 1, characterized in that: the side-blown spray gun (10) is a straight-through spray gun.
7. The efficient nickel smelting slag depletion and reduction plant of claim 1, characterized in that: the furnace body (1) is of a horizontal furnace type, and the melt receiving area (12) and the dilution reducing area (8) are arranged along the length direction of the furnace body (1).
8. The apparatus for efficient depletion and reduction of nickel smelting slag according to claim 1 or 7, characterized in that: the melt receiving zone (12) has a furnace height corresponding to the furnace height of the depletion reduction zone (8).
9. The efficient nickel smelting slag depletion and reduction plant of claim 1, characterized in that: the furnace top of the furnace body (1) is provided with 2 to 3 smoke outlets (6).
10. The apparatus for efficient depletion and reduction of nickel smelting slag according to any one of claims 1 to 9 wherein: the furnace top of the furnace body (1) is provided with a water jacket water-cooling beam (2).
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| CN202121271506.8U CN214881767U (en) | 2021-06-08 | 2021-06-08 | High-efficient dilution reduction device of nickel smelting sediment |
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| CN202121271506.8U CN214881767U (en) | 2021-06-08 | 2021-06-08 | High-efficient dilution reduction device of nickel smelting sediment |
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Effective date of registration: 20240229 Address after: 737100 No. 2 Lanzhou Road, Beijing Road Street, Jinchuan District, Jinchang City, Gansu Province Patentee after: Jinchuan Group Nickel Cobalt Co.,Ltd. Country or region after: China Address before: 737103 No. 98, Jinchuan Road, Jinchang, Gansu Patentee before: JINCHUAN GROUP Co.,Ltd. Country or region before: China |
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