CN108239708A - A kind of dry method, which suspends, is sintered Flash Smelting ferronickel Processes and apparatus - Google Patents
A kind of dry method, which suspends, is sintered Flash Smelting ferronickel Processes and apparatus Download PDFInfo
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- CN108239708A CN108239708A CN201710676648.4A CN201710676648A CN108239708A CN 108239708 A CN108239708 A CN 108239708A CN 201710676648 A CN201710676648 A CN 201710676648A CN 108239708 A CN108239708 A CN 108239708A
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- sintering
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- 238000003723 Smelting Methods 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 65
- 229910000863 Ferronickel Inorganic materials 0.000 title claims abstract description 32
- 230000008569 process Effects 0.000 title description 16
- 238000005245 sintering Methods 0.000 claims abstract description 107
- 239000000725 suspension Substances 0.000 claims abstract description 61
- 238000000227 grinding Methods 0.000 claims abstract description 44
- 238000001035 drying Methods 0.000 claims abstract description 24
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000003546 flue gas Substances 0.000 claims abstract description 18
- 239000007789 gas Substances 0.000 claims abstract description 18
- 238000002844 melting Methods 0.000 claims abstract description 15
- 230000008018 melting Effects 0.000 claims abstract description 13
- 239000002918 waste heat Substances 0.000 claims abstract description 12
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 130
- 229910052759 nickel Inorganic materials 0.000 claims description 65
- 239000000463 material Substances 0.000 claims description 35
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 30
- 239000011707 mineral Substances 0.000 claims description 30
- 239000000843 powder Substances 0.000 claims description 25
- 239000003245 coal Substances 0.000 claims description 22
- 239000012716 precipitator Substances 0.000 claims description 12
- 239000002994 raw material Substances 0.000 claims description 10
- 230000009467 reduction Effects 0.000 claims description 9
- 238000003860 storage Methods 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 239000000428 dust Substances 0.000 claims description 4
- 235000013312 flour Nutrition 0.000 claims description 4
- 239000000779 smoke Substances 0.000 claims description 4
- 235000012054 meals Nutrition 0.000 claims description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 2
- 239000003500 flue dust Substances 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 229910052738 indium Inorganic materials 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 230000032258 transport Effects 0.000 claims description 2
- 238000007499 fusion processing Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 238000000746 purification Methods 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 239000000571 coke Substances 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 abstract description 2
- 239000003344 environmental pollutant Substances 0.000 abstract description 2
- 231100000719 pollutant Toxicity 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 239000002912 waste gas Substances 0.000 abstract description 2
- 239000002023 wood Substances 0.000 abstract description 2
- 239000010935 stainless steel Substances 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- UGDGKPDPIXAUJL-UHFFFAOYSA-N ethyl n-[4-[benzyl(2-phenylethyl)amino]-2-(4-ethylphenyl)-1h-imidazo[4,5-c]pyridin-6-yl]carbamate Chemical compound N=1C(NC(=O)OCC)=CC=2NC(C=3C=CC(CC)=CC=3)=NC=2C=1N(CC=1C=CC=CC=1)CCC1=CC=CC=C1 UGDGKPDPIXAUJL-UHFFFAOYSA-N 0.000 description 4
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 description 3
- 229910000480 nickel oxide Inorganic materials 0.000 description 3
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 3
- WWNBZGLDODTKEM-UHFFFAOYSA-N sulfanylidenenickel Chemical compound [Ni]=S WWNBZGLDODTKEM-UHFFFAOYSA-N 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000000047 product Substances 0.000 description 2
- 238000009853 pyrometallurgy Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 241001417490 Sillaginidae Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000009854 hydrometallurgy Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 229910001710 laterite Inorganic materials 0.000 description 1
- 239000011504 laterite Substances 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B23/00—Obtaining nickel or cobalt
- C22B23/02—Obtaining nickel or cobalt by dry processes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B23/00—Obtaining nickel or cobalt
- C22B23/005—Preliminary treatment of ores, e.g. by roasting or by the Krupp-Renn process
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C35/00—Master alloys for iron or steel
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
A kind of dry method, which suspends, is sintered Flash Smelting ferronickel production technology and equipments, belongs to ferronickel production technology and equipments.Processing step：1）It is dry；2）Grinding；3）Multistage suspension prereduction；4）Sintering and reducing；5）Flash Smelting Furnace melting；The waste heat flue gas of Flash Smelting Furnace sequentially enters sintering furnace and multistage suspension prereduction system, and heat, reducing agent act on prereduction and sintering and reducing link in one side gas, and UTILIZATION OF VESIDUAL HEAT IN reduces energy consumption；Pit wood substance is fallen in pre-heating system in another aspect flue gas, again returns to smelting system, improves productivity, reduces pollutant emission.Total system stream closed operation, qualified discharge after waste gas purification；Equipment includes：Drying device, grinding device and dry method suspension sintering equipment；Drying device, grinding device and dry method suspension sintering equipment are linked in sequence.Advantage：Cost of investment is low, and energy-saving effect is apparent, not electricity consumption and coke, and power consumption, reducing agent cost substantially reduce；Exhaust gas, UTILIZATION OF VESIDUAL HEAT IN are abundant；High degree of automation.
Description
Technical field
The present invention relates to a kind of ferronickel production technology and equipments, more particularly to a kind of dry method, which suspends, is sintered Flash Smelting ferronickel
Production technology and equipments.
Background technology
As China's expanding economy and living standards of the people improve, stainless steel productive consumption rapid growth.Chromium nickel system is not
Rust steel is the main stainless steel kind for consuming nickel, due to its excellent comprehensive performance, is used widely, accounts for stainless steel total output
60~75%.Nickel consumption figure in China's increases rapidly in recent years, and nickel yield does not keep up with the paces of consumption figure growth so that gold
Belong to nickel and still rely on import, lead to international nickel valency and chromium valency height open it is in short supply with nickel raw material.This develops Chinese national economy,
The development of particularly stainless steel industry brings potential threat.
Laterite-type nickel ore can produce the intermediate products such as nickel oxide, sulphur nickel, iron nickel, wherein sulphur nickel, and nickel oxide is for nickel
Refinery uses, to solve the problems, such as nickel sulfide insufficient raw material.It is even more to be convenient for manufacturing stainless steel as iron nickel, reduces production
Cost.
The method of laterite nickel ore and producing ferronickel has hydrometallurgy and pyrometallurgy, but the large-scale production of technics comparing maturation
Still based on pyrometallurgy.Since the main ferronickel production technology of Chinese Enterprises is blast furnace process and electric furnace smelting, with China
Environmental protection policy requirement improves, and highly energy-consuming, high pollution industry will be closed, and this technique of blast furnace process will all be washed in a pan in recent years
It eliminates, mine heat furnace smelting（RKEF）Equally exist highly energy-consuming, high pollution situation.
Invention content
Low energy consumption the object of the present invention is to provide a kind of, environmental-friendly dry method suspend sintering Flash Smelting ferronickel technique and
Equipment solves the problems, such as the high energy consumption of generally existing, high pollution in existing smelting process.
The object of the present invention is achieved like this, and the present invention includes Flash Smelting ferronickel technique and Flash Smelting ferronickel is set
It is standby；
The Flash Smelting ferronickel equipment includes：Drying device, grinding device and dry method suspension sintering equipment；Drying device,
Grinding device and dry method suspension sintering equipment are linked in sequence.
The drying device includes：Drying coal bunker, coal bunker bucket carries, nickel minerals bucket carries, enter coal measuring chute, air flow dryer,
Beater, lateritic nickel ore heap canopy, crusher, dry dust-precipitator, lateritic nickel ore library and nickel minerals conveyer；Dry coal bunker outlet with
The entrance overlap joint that coal bunker bucket carries, the outlet and the entrance of air flow dryer that coal bunker bucket carries overlap；Lateritic nickel ore heap canopy, nickel minerals bucket
It carries, the entrance and exit of beater and nickel minerals conveyer sequence overlaps；The outlet of air flow dryer is connected with drying and gathers dust simultaneously
Device and crusher, the delivery outlet of crusher are connect by belt conveyor with the entrance in lateritic nickel ore library.
The grinding device includes：Nickel minerals library bucket carries, powder library bucket carries, grinding measuring chute, lateritic nickel ore library, Vertical Mill are defeated
Send machine, grinding conveyer, Vertical Mill and powder library, cyclone separator；The delivery outlet in lateritic nickel ore library is overlapped on Vertical Mill conveyer
Top；The outlet of Vertical Mill lower end is overlapped on nickel minerals library bucket and carries entrance, and the outlet that nickel minerals library bucket carries is located at the top of Vertical Mill conveyer,
The outlet of grinding measuring chute is connected positioned at the top of Vertical Mill conveyer, the output terminal of Vertical Mill conveyer and the feeding mouth of Vertical Mill, Vertical Mill
Product outlet be overlapped on above grinding conveyer by cyclone separator, the discharge end of grinding conveyer, which is located at powder library and struggles against, to be carried
Feeding mouth, the discharge port overlap joint and the feeding mouth in powder library that powder library bucket carries.
The dry method suspension sintering equipment includes：Suspension sintering bucket carries, the sintering measuring chute that suspends, suspends to be sintered and gather dust
Device, sintering furnace, hot-blast stove and Flash Smelting Furnace and multistage suspension prereduction device；The discharge port in powder library is overlapped on suspension sintering bucket and carries
Feeding mouth, the sintering discharge port that carries of bucket that suspends is sintered measuring chute by suspension and is overlapped on multistage suspension prereduction device pan feeding
Mouthful, while the meal outlet for the sintering dust-precipitator that suspends also is overlapped on multistage suspension prereduction device feeding mouth；Multistage suspension is gone back in advance
The discharge port of original device is overlapped on the feeding mouth of sintering furnace, and hot-blast stove is connect with sintering furnace air intake vent, the discharge port of sintering furnace with
The feeding mouth connection of Flash Smelting Furnace.
The dry method, which suspends, is sintered Flash Smelting ferronickel technique, includes the following steps：
（1）It is dry：Lateritic nickel ore raw material is sent into drying and dewatering in air flow dryer after broken；
（2）Grinding：Nickel minerals raw material is milled to flour in grinding machine inner powder after drying, and material enters in material storage storage after grinding；
（3）Multistage prereduction：Material enters multistage suspension pre-heating system in storage warehouse, and multistage suspension pre-heating system is gone here and there by several
The whirlwind preheater composition of connection, pre-thermal level is several to be determined according to working condition；
（4）Sintering and reducing：Material enters sintering furnace roasting reduction after preheating；
（5）Flash Smelting Furnace melting：Mineral aggregate transports to melting in Flash Smelting Furnace after sintering；
（6）The waste heat flue gas of Flash Smelting Furnace discharge leads directly to suspension sintering and reducing, prereduction system.
The step（1）In, material moisture is controlled 6% or so；
The step（2）In, material grinding fineness is less than 0.08mm；
The step（3）In, the control of multistage suspension pre-heating system preheating temperature carries out in the range of 300 ~ 750 DEG C；
The step（4）In, the control of sintering furnace roasting reduction temperature carries out in the range of 700 ~ 1200 DEG C.
The step（6）In, flash furnace smelting process discharge waste heat flue gas enters in sintering furnace, provides sintering furnace sintering heat
Amount, sintering furnace discharge heat smoke are entered back into multistage suspension preheating, prereduction system, and the exhaust gas of suspension preheating system discharge is through bag
Air is discharged into after the purification of formula dust-precipitator.
The step（6）In, CO, H for being discharged with flue gas during Flash Smelting Furnace melting2Reducing agent for suspension sintering and reducing.
The step（6）In, nickeliferous, ferriferous oxide flue dust is deposited in sintering furnace and multistage in Flash Smelting Furnace discharge ash-laden gas
In suspension preheating system, Flash Smelting Furnace melting is again returned to sintered material.
Advantageous effect, by adopting the above-described technical solution, heat-treating system warm-up in advance using multistage suspension, suspend sintering
Stove sintering prereduction, Flash Smelting Furnace smelting reduction process rationally utilize flash furnace smelting process discharge waste heat flue gas, respectively will be hot
Amount, reducing agent effectively apply to sintering and reducing, multistage suspension in advance in thermal reduction system；Part iron-doped nickel oxide is with cigarette in Flash Smelting Furnace
Gas enters sintering furnace and multistage suspension heat-treats system in advance, and fall to sintering furnace, multistage suspension is heat-treated in system in advance, return to
Flash Smelting Furnace melting.Material is in high temperature Condensed transportation state into Flash Smelting Furnace.Using dry sintering plus flash furnace smelting nickel-iron work
Skill, energy consumption cost are greatly reduced, and system off gas purification discharge improves production efficiency and social benefit.
The waste heat flue gas of Flash Smelting Furnace sequentially enters sintering furnace and multistage suspension prereduction system, one side gas in the present invention
Middle heat, reducing agent act on prereduction and sintering and reducing link, and UTILIZATION OF VESIDUAL HEAT IN reduces energy consumption；Pit wood in another aspect flue gas
Substance is fallen in pre-heating system, again returns to smelting system, improves productivity, reduces pollutant emission.Total system stream is sealed
Close operation, qualified discharge after waste gas purification.
Advantage：
1st, cost of investment is low, and a production line can realize 100,000 tons/year or more production capacities, and similary production capacity invests older technique mineral hot furnace
It smelts（RKEF）Reduce 40%；
2nd, production cost is compared with mine heat furnace smelting（RKEF）Technique reduces 20-30%；
3rd, the investment payback time is short, about 18 months；
4th, energy-saving effect is apparent, and smelting process provides thermal energy and reducing agent, not electricity consumption and coke, power consumption, reduction using pure oxygen and coal
Agent cost substantially reduces；Exhaust gas, UTILIZATION OF VESIDUAL HEAT IN are abundant, reduce reducing agent, waste heat waste；
5th, environmental-friendly, the conveying of overall process material can close progress, and dust pollution is controllable；Exhaust gas, UTILIZATION OF VESIDUAL HEAT IN are abundant, NOx, powder
Dirt particulate matter qualified discharge；
6th, high degree of automation, each link index of production process can realize center control.
Description of the drawings
Fig. 1 is the dry method suspension sintering Flash Smelting ferronickel process flow chart of the present invention.
Fig. 2 is the drying technology process figure of the present invention.
Fig. 3 is the grinding process figure of the present invention.
Fig. 4 is the dry method suspension sintering process flow chart of the present invention.
In figure：1st, coal surge bunker is dried；2-1, coal bunker bucket carry；2-2, nickel minerals bucket carry；2-3, nickel minerals library bucket carry；2-4, powder
Library bucket carries；2-5 suspends to be sintered to struggle against and carry；3-1, enter coal measuring chute；3-2 grinding measuring chutes；3-3, suspend sintering measuring chute；4th, hot wind
Dryer；5th, beater；6th, lateritic nickel ore heap canopy；7th, crusher；8-1, grinding dust-precipitator；8-2, suspend sintering dust-precipitator；9、
Lateritic nickel ore library；10-1, nickel minerals conveyer；10-2, Vertical Mill conveyer；10-3, grinding conveyer；11st, Vertical Mill；12nd, filler bin；
13rd, cyclone separator 14, sintering furnace；15th, hot-blast stove；16th, Flash Smelting Furnace；17th, suspension prereduction device.
Specific embodiment
The present invention includes Flash Smelting ferronickel technique and Flash Smelting ferronickel equipment；
The Flash Smelting ferronickel equipment includes：Drying device, grinding device and dry method suspension sintering equipment；Drying device,
Grinding device and dry method suspension sintering equipment are linked in sequence.
The drying device includes：Drying coal bunker 1, coal bunker bucket carries 2-1, nickel minerals bucket carries 2-2, enters coal measuring chute 3-1, heat
Wind dryer 4, beater 5, lateritic nickel ore heap canopy 6, crusher 7, dry dust-precipitator 8-1, lateritic nickel ore library 9 and nickel minerals conveyer
10-1；It dries the outlet of coal bunker 1 and coal bunker bucket carries the entrance overlap joint of 2-1, coal bunker bucket carries the outlet of 2-1 and air flow dryer 4
Entrance overlaps；The entrance and exit sequence that lateritic nickel ore heap canopy 6, nickel minerals bucket carry 2-2, beater 5 and nickel minerals conveyer 10-1 is taken
It connects；The outlet of air flow dryer 4 is connected with dry dust-precipitator 8-1 and crusher 7 simultaneously, and the delivery outlet of crusher 7 passes through belt
Conveyer is connect with the entrance in lateritic nickel ore library 9.
The grinding device includes：Nickel minerals library bucket carries 2-3, powder library bucket carries 2-4, grinding measuring chute 3-2, lateritic nickel ore
Library 9, Vertical Mill conveyer 10-2, grinding conveyer 10-3, Vertical Mill 11, powder library 12 and cyclone separator 13；Lateritic nickel ore library 9
Delivery outlet is overlapped on the top of Vertical Mill conveyer 10-2；The outlet of 11 lower end of Vertical Mill is overlapped on nickel minerals library bucket and carries 2-3 entrances, nickel minerals
Library bucket proposes the outlet of 2-3 positioned at the top of Vertical Mill conveyer 10-2, and grinding measuring chute 3-2 is located at the upper of Vertical Mill conveyer 10-2
Side, the output terminal of Vertical Mill conveyer are connect with the feeding mouth of Vertical Mill 11, and the product outlet of Vertical Mill 11 is taken by cyclone separator 13
It is connected on above grinding conveyer 10-3, the discharge end of grinding conveyer 10-3 is located at the feeding mouth that powder library bucket carries 2-4, powder library
Bucket carries the discharge port overlap joint of 2-4 and the feeding mouth in powder library 12.
The dry method suspension sintering equipment includes：The sintering bucket that suspends carries 2-5, suspension is sintered measuring chute 3-3, suspend sintering
Dust-precipitator 8-2, sintering furnace 14, hot-blast stove 15 and Flash Smelting Furnace 16 and multistage suspension prereduction device 17；The discharge port in powder library 12
It is overlapped on to suspend to be sintered to struggle against and carries the feeding mouth of 2-5, the discharge port that the sintering bucket that suspends carries 2-5 is taken by the sintering measuring chute 3-3 that suspends
17 feeding mouth of multistage suspension prereduction device is connected on, while the meal outlet for the sintering dust-precipitator 8-2 that suspends also is overlapped on multistage suspension
On 17 feeding mouth of prereduction device；The discharge port of multistage suspension prereduction device 17 is overlapped on the feeding mouth of sintering furnace 14, hot wind
Stove 15 is connect with 14 air intake vent of sintering furnace, and the discharge port of sintering furnace 14 is connect with the feeding mouth of Flash Smelting Furnace 16.
The dry method, which suspends, is sintered Flash Smelting ferronickel technique, includes the following steps：
（1）It is dry：Lateritic nickel ore raw material enters drying and dewatering in air flow dryer after crusher, beater dispersion, after drying
Discharge stock chart water ＜ 6%；
（2）Grinding：Nickel minerals raw material, which is sent into grinding machine, after drying carries out grinding to flour, and material enters material storing after grinding
In storehouse；Material grinding fineness ＜ 0.08mm；
（3）Multistage suspension prereduction：Material enters multistage suspension and heat-treats system in advance in storage warehouse, and material is preheated, is done
Dry, prereduction, the process temperature are controlled in the range of 400 ~ 700 DEG C；
（4）Sintering and reducing：Material enters sintering furnace reduction roasting after prereduction, and sintering temperature is controlled at 700 ~ 1200 DEG C；
（5）Flash Smelting Furnace melting：Material enters melting in Flash Smelting Furnace after sintering and reducing；
（6）The waste heat flue gas of Flash Smelting Furnace discharge leads directly to suspension sintering and reducing, prereduction system.
This technique further includes：
1）The step（3）With step（4）Heat source comes from Flash Smelting Furnace waste heat flue gas；Flash Smelting Furnace discharge high-temperature flue gas sequentially enters burning
Freezing of a furnace, multistage suspension prereduction system, provide material sintering and reducing, prereduction heat；According to the need of sintering furnace sintering heat
Seek the working condition of determining hot-blast stove.
2）The step（3）With step（4）Reducing agent comes from Flash Smelting Furnace waste heat flue gas；In Flash Smelting Furnace discharge high-temperature flue gas
CO、H2Sequentially enter sintering furnace, multistage suspension heat-treats system in advance, provide material sintering and reducing, prereduction reducing agent.
3）Step（5）Flue gas enters sintering furnace, multistage suspension heat-treats system in advance, ferronickel in flue gas for Flash Smelting Furnace melting discharge
Oxide is deposited in sintering furnace, multistage suspension in advance in thermal reduction system, participates in prereduction, sintering and reducing operation again.
4）Step（5）Sintering and reducing material into Flash Smelting Furnace belongs to high temperature Condensed transportation state, and hot material enters stove.
Embodiment 1：The present invention is a kind of dry method suspension sintering Flash Smelting ferronickel technique, and specific embodiment is as follows：
The lateritic nickel ore used in the present embodiment come from Indonesia, nickeliferous more than 1.8%, Total iron content 14%, moisture is about
30~35%（Divide Nei Shui and outer water）.
A kind of dry method, which suspends, is sintered Flash Smelting ferronickel technique, and process flow chart is as shown in Figure 1, include the following steps：
Step 1, it is dry：Lateritic nickel ore is taken, broken lateritic nickel ore is sent into air flow dryer dehydration, lateritic nickel ore after drying
Into lateritic nickel ore library.Wherein：Moisture after drying materials（Outer water）Content 6% or so,（See Fig. 2）.
Step 2, grinding：Material takes out from lateritic nickel ore library enters flour mill, through levigate to being transported to raw material powder after powdery
Repository,（See Fig. 3）.
Step 3, prereduction：Material conveys first order preheater material mouth after metering in raw material powder repository, and material is three
Heat exchange preheating is carried out with hot gas in grade preheater, forms material and tail gas after preheating after preheating.The prereduction system heat
Gas comes from sintering furnace, and hot gas contains the heat and reducing agent needed for prereduction technique,（See Fig. 4）.
Step 4, sintering and reducing：The buffered storehouse of material enters sintering furnace and is sintered reduction, sintering furnace heat source after prereduction
Heat smoke and Combustion of Hot Air Furnace heat from Flash Smelting Furnace, Flash Smelting Furnace heat smoke are passed through in sintering furnace, and heat meets sintering process,
Hot-blast stove work stops.Wherein, sintering temperature is 700 ~ 1200 DEG C,（See Fig. 4）.
Step 5, Flash Smelting Furnace melting：Material high temperature concentrated phase wind is sent after sintering and reducing, into Flash Smelting Furnace melting, slag and ferronickel
Alloy separation discharging,（See Fig. 4）.
Flash Smelting Furnace discharge waste heat gas is passed through sintering furnace, and sintering furnace discharge hot gas sequentially enters multistage suspension preheating again
Device is discharged into air from the exhaust gas of preheater discharge is purified.
Those skilled in the art is not under conditions of the spirit and scope of the present invention that claims determine are departed from, also
Various modifications can be carried out to more than content.Therefore the scope of the present invention be not limited in more than explanation, but by
The range of claims is come determining.
Claims (9)
- The equipment of sintering Flash Smelting ferronickel 1. a kind of dry method suspends, it is characterized in that：Flash Smelting ferronickel equipment includes：Dry dress It puts, grinding device and dry method suspension sintering equipment；Drying device, grinding device and dry method suspension sintering equipment are linked in sequence.
- The equipment of sintering Flash Smelting ferronickel 2. a kind of dry method according to claim 1 suspends, it is characterized in that：Described is dry Dry device includes：Drying coal bunker, coal bunker bucket carries, nickel minerals bucket carries, enters coal measuring chute, air flow dryer, beater, lateritic nickel ore heap Canopy, crusher, dry dust-precipitator, lateritic nickel ore library and nickel minerals conveyer；The entrance that the outlet of drying coal bunker is carried with coal bunker bucket is taken It connects, the outlet and the entrance of air flow dryer that coal bunker bucket carries overlap；Lateritic nickel ore heap canopy, nickel minerals bucket carry, beater and nickel minerals are defeated The entrance and exit sequence of machine is sent to overlap；The outlet of air flow dryer 4 is connected with dry dust-precipitator and crusher, crusher simultaneously Delivery outlet connect by belt conveyor with the entrance in lateritic nickel ore library.
- The equipment of sintering Flash Smelting ferronickel 3. a kind of dry method according to claim 1 suspends, it is characterized in that：The powder Mill apparatus includes：Nickel minerals library bucket carry, powder library bucket carries, grinding measuring chute, cyclone separator, lateritic nickel ore library, Vertical Mill conveyer, Grinding conveyer, Vertical Mill and powder library；The delivery outlet in lateritic nickel ore library is overlapped on the top of Vertical Mill conveyer；Vertical Mill lower end goes out Mouth is overlapped on nickel minerals library bucket and carries entrance, and the outlet that nickel minerals library bucket carries is located at vertical positioned at the top of Vertical Mill conveyer, grinding measuring chute The top of conveyer is ground, the output terminal of Vertical Mill conveyer and the feeding mouth of Vertical Mill connect, and the product outlet of Vertical Mill passes through whirlwind point It is overlapped on above grinding conveyer from device, the discharge end of grinding conveyer is located at the feeding mouth that powder library bucket carries, and powder library bucket carries Discharge port overlap joint and the feeding mouth in powder library.
- The equipment of sintering Flash Smelting ferronickel 4. a kind of dry method according to claim 1 suspends, it is characterized in that：Described is dry Method suspension sintering equipment includes：Suspend sintering bucket carry, suspends sintering measuring chute, suspend be sintered dust-precipitator, sintering furnace, hot-blast stove and Flash Smelting Furnace and multistage suspension prereduction device；The discharge port in powder library is overlapped on the feeding mouth that sintering bucket carries that suspends, and suspend sintering The discharge port carried that struggles against is sintered measuring chute by suspension and is overlapped on multistage suspension prereduction device feeding mouth, while the sintering that suspends is gathered dust The meal outlet of device is also overlapped on multistage suspension prereduction device feeding mouth；The discharge port of multistage suspension prereduction device is overlapped on The feeding mouth of sintering furnace, hot-blast stove are connect with sintering furnace air intake vent, and the discharge port of sintering furnace and the feeding mouth of Flash Smelting Furnace connect.
- The technique of sintering Flash Smelting ferronickel 5. a kind of dry method suspends, it is characterized in that：Include the following steps：（1）It is dry：Lateritic nickel ore raw material is sent into drying and dewatering in air flow dryer after broken；（2）Grinding：Nickel minerals raw material is milled to flour in grinding machine inner powder after drying, and material enters in material storage storage after grinding；（3）Multistage prereduction：Material enters multistage pre-heating system, the whirlwind that multistage pre-heating system is connected by several in storage warehouse Cartridge type preheater forms, and pre-thermal level is several to be determined according to working condition；（4）Sintering and reducing：Material enters sintering furnace roasting reduction after preheating；（5）Flash Smelting Furnace melting：Mineral aggregate transports to melting in Flash Smelting Furnace after sintering；（6）The waste heat flue gas of Flash Smelting Furnace discharge leads directly to suspension sintering and reducing, prereduction system.
- 6. a kind of dry method, which suspends, according to claim 5 is sintered the technique of Flash Smelting ferronickel, it is characterized in that：The step（1）In, material moisture is controlled 6% or so；The step（2）In, material grinding fineness is less than 0.08mm；The step（3）In, the control of multistage suspension pre-heating system preheating temperature carries out in the range of 300 ~ 750 DEG C；The step（4）In, the control of sintering furnace roasting reduction temperature carries out in the range of 700 ~ 1200 DEG C.
- 7. a kind of dry method, which suspends, according to claim 5 is sintered Flash Smelting ferronickel technique, it is characterized in that：Step（6）In, it dodges Fast stove fusion process discharge waste heat flue gas enters in sintering furnace, provides sintering furnace sintering heat, sintering furnace discharge heat smoke again into Enter in multistage suspension preheating, prereduction system, the exhaust gas of suspension preheating system discharge is discharged into air after bag filter purifies.
- 8. a kind of dry method, which suspends, according to claim 5 is sintered Flash Smelting ferronickel technique, it is characterized in that：The step（6） In, CO, H for being discharged with flue gas during Flash Smelting Furnace melting2Reducing agent for suspension sintering and reducing.
- 9. a kind of dry method, which suspends, according to claim 5 is sintered Flash Smelting ferronickel technique, it is characterized in that：The step（6） In, nickeliferous, iron flue dust is deposited in sintering furnace and multistage suspension pre-heating system in Flash Smelting Furnace discharge ash-laden gas, with sintered material Again return to Flash Smelting Furnace melting.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112923731A (en) * | 2021-02-06 | 2021-06-08 | 江西铜业集团(贵溪)冶金化工工程有限公司 | Local maintenance method for flash furnace bottom bricks |
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