CN107653382A - A kind of suspension preheating melting and reducing ferronickel production equipment and method - Google Patents
A kind of suspension preheating melting and reducing ferronickel production equipment and method Download PDFInfo
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- CN107653382A CN107653382A CN201711159229.XA CN201711159229A CN107653382A CN 107653382 A CN107653382 A CN 107653382A CN 201711159229 A CN201711159229 A CN 201711159229A CN 107653382 A CN107653382 A CN 107653382A
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- 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
- C22B23/023—Obtaining nickel or cobalt by dry processes with formation of ferro-nickel or ferro-cobalt
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/006—Starting from ores containing non ferrous metallic oxides
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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
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/143—Reduction of greenhouse gas [GHG] emissions of methane [CH4]
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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
A kind of suspension preheating melting and reducing ferronickel production equipment and method, belong to smelting laterite-nickel ores production equipment and method.Technique is the wet ore deposit drying of lateritic nickel ore, broken rear and flux raw material progress dispensing, material after dispensing enters melting end reducing furnace after vertical mill grinding forms powdery mineral aggregate, powdery mineral aggregate carries out preheating prereduction into preheating prereduction device to carry out melting whole reduction, and the material of melting completes slag sluicing system in stove；Preheating prereduction uses suspension preheating prereduction device, and material moves downward step by step from top, and reproducibility heat smoke moves upwards step by step from bottom, and the suspension preheating prereduction of material is completed in motion process.The technique realizes the suspended state preheating prereduction of mineral aggregate, strengthens heat transfer effect；Melting reduction eventually, improve the production capacity of system, and ferronickel grade；Material continuous production；Heat energy recycling；The functions such as automaticity height.
Description
Technical field
The present invention relates to smelting laterite-nickel ores production equipment and method, more particularly to a kind of suspension preheating melting and reducing nickel
Iron production equipment and method.
Background technology
With the extensive use of global stainless steel and special steel, cause the main element of smelting stainless steel and special steel-
Nickel metal short supply, causes price big ups and downs.Traditional nickel Metal Production is mainly extracted from nickel sulfide ore, although production
Technical maturity, but continuously exploited by last 100 yearses, resource is fewer and fewer, forces people to accounting for the most oxidation of earth nickel resources
Nickel metal is extracted in nickel minerals and gives more attention.
Laterite-type nickel ore can produce the intermediate products such as nickel oxide, sulphur nickel, iron nickel, the method for laterite nickel ore and producing ferronickel
There are hydrometallurgy and pyrometallurgy, but the large-scale production of technics comparing maturation is still based on pyrometallurgy.Due to Chinese Enterprises
Main ferronickel production technology is blast furnace process and mine heat furnace smelting（RKEF）, as Environmental Protection in China policy requirements improve, high consumption
Energy, high pollution industry will be closed, and this technique of blast furnace process will all eliminate in recent years, mine heat furnace smeltings（RKEF）Equally
Highly energy-consuming, high pollution situation be present.
The content of the invention
The present invention provides a kind of suspension preheating melting and reducing ferronickel production equipment and method, solves existing pyrometallurgical smelting ferronickel
The problem of alloy high energy consumption, high pollution and low production efficiency.
The object of the present invention is achieved like this：The present invention includes suspension preheating melting and reducing ferronickel production equipment and side
Method.
Described suspension preheating melting and reducing ferronickel production equipment includes：
Dryer, laterite disintegrating machine, flux raw material, flux disintegrating machine, proportioning station, Vertical Mill, material homogenizer storehouse, drying duster,
Dry blower fan, feeding bin, fluidization suspension preheating prereduction device, pre-reducing furnace, fusion reducing furnace, smoke washer, reduction
Deduster, reduction blower fan, coal mill, Pulverized Coal Bin, oxygen generating station and gas producer or natural gas；
Dryer is overlapped on proportioning station feeding mouth through the output of laterite disintegrating machine, and the output of flux disintegrating machine is overlapped on proportioning station pan feeding
Mouthful；Proportioning station delivery outlet is to the feeding mouth of Vertical Mill, the discharging opening of Vertical Mill and material homogenizer storehouse, feeding bin, fluidization suspension preheating
Prereduction device and pre-reducing furnace are linked in sequence, the compound feeding mouth overlap joint of output end and fusion reducing furnace；Coal is ground through coal dust
The coal dust feeding mouth of storehouse and fusion reducing furnace connects；The burning that oxygen generating station passes through gas producer or natural gas and fusion reducing furnace
Device input port connects；The exhanst gas outlet of dryer is connected by drying duster with drying blower fan, will be caused useless in dryer
Gas is discharged；The outlet port of suspension preheating prereduction device passes through smoke washer and reduction deduster and reduction blower fan order
Connection, the waste gas of suspension preheating prereduction device is discharged.
Described suspension preheating prereduction device is the whirlwind reductor no less than two level, and pre-reducing furnace is positioned at second from the bottom
Level.
Fusion reducing furnace is rectangle kiln, by reduction body of heater, coal or material spray gun, burner, exhanst gas outlet, fire proofed wood
Material, copper cold water jacket, slag-drip opening, ferronickel mouth and accident mouth composition；Coal or material spray gun are symmetrically arranged amongst the top of melting and reducing body of heater,
And insert below slag phase liquid level, it is more than slag iron liquid level；Burner is arranged on the upper end of fusion reducing furnace, and exhanst gas outlet is arranged on molten
Melt the middle part of reduction furnace upper end, slag-drip opening, ferronickel mouth and accident mouth are arranged on the rear end of fusion reducing furnace, and arrange from top to bottom
Row；Refractory material is used below reduction body of heater melt liquid level, the above is using copper cold water jacket protection fusion reducing furnace.
Described suspension preheating melt production method is as follows：
（1）The wet ore deposit stockyard of lateritic nickel ore enters laterite crusher in crushing after drying machine drying, and the material after crushing is laterite
Nickel minerals dry mine；Lateritic nickel ore dry mine is delivered to the storage of lateritic nickel ore dry mine stockyard；
（2）Lime stone flux raw material is delivered to stockyard storage after flux crusher in crushing；
（3）The material in lateritic nickel ore dry mine stockyard and flux stockyard is delivered to proportioning station and carries out dispensing, and the compound after dispensing is defeated
Deliver to stockyard storage；
（4）The mixed material in mixing mineral aggregate stockyard forms powdery mineral aggregate, the fineness of powdery mineral aggregate after vertical mill grinding<1.0mm；Powder
Shape mineral aggregate is delivered to material homogenizer storehouse storage homogenizing；
（5）The feeding bin at the top of feedstock transportation to suspension preheating prereduction device in material homogenizer storehouse, feeding bin continuously to
Suspension preheating prereduction device feeding, material move downward step by step from top, and reproducibility heat smoke moves upwards step by step from bottom,
The suspension preheating prereduction of material is completed in motion process；Described suspension preheating prereduction device be no less than two level,
Pre-reducing furnace is installed, pre-reducing furnace carries out prereduction to homogenizing mixing mineral aggregate before afterbody；
（6）Coal Stack Yard stores coal, and coal forms coal dust after coal milling mill, is delivered to Pulverized Coal Bin storage；A coal dust part is delivered to
Pre-reducing furnace completes burning, and produces partial reduction flue gas；Another part coal dust is delivered to the coal dust rifle of fusion reducing furnace, sprays into
Imperfect combustion is carried out in fusion reducing furnace, heat and reducing agent are provided for melting and reducing；
（7）The tail gas of suspension preheating prereduction device goes out through smoke washer, reduction deduster and reduction blower fan heel row, a part
Be delivered to drying machine drying material, by drying duster, drying blower fan after discharge；
（8）Oxygen made from oxygen generating station is delivered to fusion reducing furnace simultaneously through gas producer or natural gas with coal gas or natural gas
Burner, for burning oxygen is provided；
（9）600 ~ 800 DEG C of high temperature powder feed powder spirt of suspension preheating prereduction device afterbody output enters melting also
Former stove, under the reducing atmosphere of high temperature, the gradual melting and reducing of granular material, it is changed into liquid ferronickel and liquid slag；Liquid slag is through slag
Slag is formed after mouth discharge cooling；Liquid ferronickel forms ferronickel after tapping hole discharge cooling.
The exhanst gas outlet of described fusion reducing furnace is arranged in the middle part of fusion reducing furnace, and the reduction flue gas partial of system enters
Preheat prereduction device, heating and preliminary reducing material；Vertical Mill and coal mill are delivered to after the purified processing of another part high-temperature flue gas
Used for drying.
Beneficial effect, as a result of such scheme, metal original ore powder state mineral aggregate fills in the prereduction of fluidization suspension preheating
Interior multiple heat exchange and the material qi leel completed is put from the material of preheated prereduction enters fusion reducing furnace, and fusion reducing furnace provides
The reducing environment of metal oxide, makes metal target obtain melting and reducing；Suspension preheating prereduction device it is treated 600 ~
800 DEG C of high temperature powder state materials are not required to cool down, and direct Condensed transportation powder spirt enters fusion reducing furnace, the high temperature of fusion reducing furnace discharge
Flue gas is reduced, the heating of suspension preheating prereduction device and pre-reducing fine state mineral aggregate, suspension preheating prereduction device are introduced through blower fan
The high-temperature flue gas of discharge, dryer can be introduced and used for material drying；The mixed material in stockyard forms powdery after vertical mill grinding
Mineral aggregate, the fineness of powdery mineral aggregate<1.0mm；Powdery mineral aggregate is delivered to material homogenizer storehouse storage homogenizing.
A kind of rectangle fusion reducing furnace is employed, furnace side is arranged symmetrically coal, material spray gun, and furnace roof is arranged symmetrically two burnings
Device.Coal, material spray gun are set in the front end of fusion reducing furnace, and rear end is not provided with；Length direction pair of the burner in fusion reducing furnace
Claim to set, be heated evenly the top of the slag；Below coal, material spray gun insertion fused materials liquid level, more than slag iron liquid level；Burner is arranged on
It is more than fused materials liquid level；Reduce body of heater to protect using refractory material and copper cold water jacket, refractory material used below melt liquid level,
Slag line and the above use copper cold water jacket；Slag-drip opening, ferronickel mouth and accident mouth are provided with rectangle fusion reducing furnace rear portion, three is certainly
Upper and lower arrangement, and the certain distance that staggers in the horizontal direction；Oxygen made from oxygen generating station enters gas producer or natural gas adds
After heat, into shape fusion reducing furnace.
The technique realizes the suspension fluidization preheating prereduction of mineral aggregate, strengthens heat transfer effect；Melting reduction eventually, improves system
The production capacity and ferronickel grade of system；Material continuous production；Heat energy recycling；The functions such as automaticity height.
The present invention solves the problems, such as existing pyrometallurgical smelting dilval high energy consumption, high pollution and low production efficiency, reaches
The purpose of the present invention is arrived.
Advantage：
1st, need not the group of making, heat exchanger effectiveness is greatly improved using powder state suspension heat exchange.
2nd, it is forced heat-exchanging to melt end reducing furnace, ensure that reduction heat transfer effect.
3rd, mineral aggregate high temperature, which enters, melts end reducing furnace, and production efficiency is significantly lifted.
4th, by the combination of suspension preheating pre-reducing furnace and fusion reducing furnace, melting smoke heat energy and preheating prereduction are made
It is shared, reach energy-conservation purpose.
5th, fusion reducing furnace has the function of melting and reducing and slag iron isolation.
7th, the energy is single, and burnt and electricity is instead of with raw coal（Except power electricity consumption）, reduce production cost.
8th, system process parameters can be adjusted flexibly for different mineral, to different metal or ferroalloy smelting strong adaptability.
9th, strong adaptability, suitable for various high, normal, basic nickel lateritic nickel ores.
10th, cost advantage is big, and smelting cost is far below existing smelting process product cost.
11st, environment-friendly, production process logistics is closed, and environmental practice is perfect, it is easy to accomplish green metallurgical concept.
Brief description of the drawings
Fig. 1 is the suspension preheating smelting reduction process flow chart of the present invention.
Fig. 2 is the overlooking structure figure of the fusion reducing furnace of the present invention.
Fig. 3 is the main structure figure of the fusion reducing furnace of the present invention.
Fig. 4 is the left view structure chart of the fusion reducing furnace of the present invention.
In figure, 1, the wet ore deposit stockyard of lateritic nickel ore；2nd, dryer；3rd, laterite disintegrating machine；4th, lateritic nickel ore dry mine stockyard；5th, melt
Agent raw material；6th, flux disintegrating machine；7th, flux stockyard；8th, proportioning station；9th, mineral aggregate stockyard is mixed；10th, Vertical Mill；11st, material homogenizer
Storehouse；12nd, dedusting is dried；13rd, blower fan is dried；14th, feeding bin；15th, suspension preheating prereduction device；16th, pre-reducing furnace；17th, melt
Melt reduction furnace；18th, smoke washer；19th, deduster is reduced；20th, blower fan is reduced；21st, Coal Stack Yard；22nd, coal is ground；23rd, Pulverized Coal Bin；
24th, slag；25th, ferronickel；26th, oxygen generating station；27th, gas producer or natural gas；17-1, reduction body of heater；17-2, coal or material spray gun；
17-3, burner；17-4, exhanst gas outlet；17-5, refractory material；17-6, copper cold water jacket；17-7, slag-drip opening；17-8, ferronickel
Mouthful；17-9, accident mouth.
Embodiment
The present invention includes suspension preheating melting and reducing ferronickel production method and equipment.
Described suspension preheating melting and reducing ferronickel production equipment includes：Dryer 2, laterite disintegrating machine 3, flux raw material 5,
Flux disintegrating machine 6, proportioning station 8, Vertical Mill 10, material homogenizer storehouse 11, drying duster 12, drying blower fan 13, feeding bin 14, fluidised form
Change suspension preheating prereduction device 15, pre-reducing furnace 16, fusion reducing furnace 17, smoke washer 18, reduction deduster 19, reduction
Blower fan 20, coal mill 22, Pulverized Coal Bin 23, slag 24, ferronickel 25, oxygen generating station 26 and gas producer or natural gas 27；Dryer 2 is through red
The native output of disintegrating machine 3 is overlapped on the feeding mouth of proportioning station 8, and the output of flux disintegrating machine 6 is overlapped on the feeding mouth of proportioning station 8；Proportioning station 8 is defeated
The feeding mouth of Vertical Mill 10 is exported to, the discharging opening of Vertical Mill 10 is gone back in advance with material homogenizer storehouse 11, feeding bin 14, fluidization suspension preheating
Original device 15 and pre-reducing furnace 16 are linked in sequence, and output end and the compound feeding mouth of fusion reducing furnace 17 overlap；The warp of coal mill 22
Pulverized Coal Bin 23 is connected with the coal dust feeding mouth of fusion reducing furnace 17；Oxygen generating station 26 passes through gas producer or natural gas 27 and melting
The hot blast input port connection of reduction furnace 17；The exhanst gas outlet of dryer 2 is connected by drying duster 12 with drying blower fan 13, will
Caused waste gas discharge in dryer 2；The outlet port of suspension preheating prereduction device 15 is by smoke washer 18 and also
Former deduster 19 is linked in sequence with reduction blower fan 20, and the waste gas of suspension preheating prereduction device 15 is discharged.
Described suspension preheating prereduction device 15 is the whirlwind reductor no less than two level, and pre-reducing furnace 16 is positioned at inverse
The second level.
Fusion reducing furnace 17 is rectangle kiln, by reduction body of heater 17-1, coal or material spray gun 17-2, burner 17-3, cigarette
Gas outlet 17-4, refractory material 17-5, copper cold water jacket 17-6, slag-drip opening 17-7, ferronickel mouth 17-8 and accident mouth 17-9 compositions；Coal
Or material spray gun 17-2 is symmetrically arranged amongst melting and reducing body of heater 17-1 top, and insert below slag phase liquid level, more than slag iron liquid level；
Burner 17-3 is arranged on the upper end of fusion reducing furnace 17, and exhanst gas outlet 17-4 is arranged on the middle part of the upper end of fusion reducing furnace 17,
Slag-drip opening 17-7, ferronickel mouth 17-8 and accident mouth 17-9 are arranged on the rear end of fusion reducing furnace 17, and arrange from top to bottom；Reduction
Refractory material 17-5 is used below body of heater 17-1 melt liquid levels, the above is using copper cold water jacket 17-6 protection fusion reducing furnaces.
Described suspension preheating smelting reduction process is as follows：
（1）The wet ore deposit stockyard 1 of lateritic nickel ore enters laterite disintegrating machine 3 after the drying of dryer 2 and crushed, and the material after crushing is red
Native nickel minerals dry mine；Lateritic nickel ore dry mine is delivered to lateritic nickel ore dry mine stockyard 4 and stored.
（2）Lime stone flux raw material 5 is delivered to stockyard 7 after flux disintegrating machine 6 is broken and stored.
（3）The material in lateritic nickel ore dry mine stockyard 4 and flux stockyard 7 is delivered to proportioning station 8 and carries out dispensing, mixed after dispensing
Conjunction material is delivered to stockyard 9 and stored.
（4）The mixed material in mixing mineral aggregate stockyard 9 forms powdery mineral aggregate, the fineness of powdery mineral aggregate after the grinding of Vertical Mill 10<
1.0mm；Powdery mineral aggregate is delivered to the storage of material homogenizer storehouse 11 homogenizing.
（5）The feeding bin 14 at the top of feedstock transportation to suspension preheating prereduction device 15 in material homogenizer storehouse 11, feeding
Storehouse 14 continuously moves downward step by step to the feeding of suspension preheating prereduction device 15, material from top, and reproducibility heat smoke is the bottom of from
Portion is moved upwards step by step, and the suspension preheating prereduction of material is completed in motion process；Described suspension preheating prereduction device
15 be no less than two level, pre-reducing furnace 16 is provided with before afterbody, pre-reducing furnace 16 is carried out in advance also to homogenizing mixing mineral aggregate
It is former.
（6）Coal Stack Yard 21 stores coal, and coal forms coal dust after coal grinds 22 grindings, is delivered to Pulverized Coal Bin 23 and stores；Coal dust one
Part is delivered to pre-reducing furnace 16 and completes burning, and produces partial reduction flue gas；Another part coal dust is delivered to fusion reducing furnace
17 coal dust rifle, spray into and imperfect combustion is carried out in fusion reducing furnace 17, heat and reducing agent are provided for melting and reducing.
（7）The tail gas of suspension preheating prereduction device 15 is through smoke washer 18, reduction deduster 19 and reduction blower fan 20
After discharge, a part is delivered to the material drying of dryer 2, by drying duster 12, drying blower fan 13 after discharge.
（8）Oxygen made from oxygen generating station 26 is delivered to molten simultaneously through gas producer or natural gas 27 with coal gas or natural gas
Melt the burner 17-3 of reduction furnace 17, oxygen is provided for burning.
（9）600 ~ 800 DEG C of high temperature powder feed powder spirt of the afterbody of suspension preheating prereduction device 15 output enters
Fusion reducing furnace 17, under the reducing atmosphere of high temperature, the gradual melting and reducing of granular material, it is changed into liquid ferronickel and liquid slag；Liquid
Body slag forms slag 24 after cinder notch discharge cooling；Liquid ferronickel forms ferronickel 25 after tapping hole discharge cooling.
The exhanst gas outlet 17-4 of described fusion reducing furnace 17 is arranged on the middle part of fusion reducing furnace 17, the reduction flue gas of system
Part enters preheating prereduction device 15, heating and preliminary reducing material；It is delivered to after the purified processing of another part high-temperature flue gas
Vertical Mill 10 and coal mill 22 use for drying.
Claims (5)
1. a kind of suspension preheating melting and reducing ferronickel production equipment, it is characterized in that：Equipment includes：Dryer, laterite disintegrating machine, melt
Agent raw material, flux disintegrating machine, proportioning station, Vertical Mill, material homogenizer storehouse, drying duster, drying blower fan, feeding bin, fluidization are hanged
Floating preheating prereduction device, pre-reducing furnace, fusion reducing furnace, smoke washer, reduction deduster, reduction blower fan, coal mill, coal dust
Storehouse, oxygen generating station and gas producer natural gas；Dryer is overlapped on proportioning station feeding mouth through the output of laterite disintegrating machine, and flux crushes
Machine output is overlapped on proportioning station feeding mouth；Proportioning station delivery outlet to Vertical Mill feeding mouth, the discharging opening of Vertical Mill and material homogenizer storehouse,
Feeding bin, fluidization suspension preheating prereduction device and pre-reducing furnace are linked in sequence, the compound of output end and fusion reducing furnace
Feeding mouth overlaps；Coal mill connects through the coal dust feeding mouth of Pulverized Coal Bin and fusion reducing furnace；Oxygen generating station passes through gas producer or day
The hot blast input port of right gas and fusion reducing furnace connects；The exhanst gas outlet of dryer is connected by drying duster and drying blower fan
Connect, caused waste gas in dryer is discharged；The outlet port of suspension preheating prereduction device is by smoke washer and also
Former deduster is linked in sequence with reduction blower fan, and the waste gas of suspension preheating prereduction device is discharged.
2. a kind of suspension preheating melting and reducing ferronickel production equipment according to claim 1, it is characterized in that：Described suspension
It is the cyclone preheater no less than two level to preheat prereduction device, and pre-reducing furnace is located at penultimate stage.
3. a kind of suspension preheating melting and reducing ferronickel production equipment according to claim 1, it is characterized in that：Fusion reducing furnace
For rectangle kiln, by reduction body of heater, coal or material spray gun, burner, exhanst gas outlet, refractory material, copper cold water jacket, slag-drip opening,
Ferronickel mouth and accident mouth composition；Coal or material spray gun are symmetrically arranged amongst the top of melting and reducing body of heater, and insert below slag phase liquid level,
It is more than slag iron liquid level；Burner is arranged on the upper end of fusion reducing furnace, and exhanst gas outlet is arranged on the middle part of melting and reducing furnace upper end,
Slag-drip opening, ferronickel mouth and accident mouth are arranged on the rear end of fusion reducing furnace, and arrange from top to bottom；Reduce body of heater melt liquid level with
Lower to use refractory material, the above is using copper cold water jacket protection fusion reducing furnace.
4. using a kind of production method of suspension preheating melting and reducing ferronickel production equipment described in claim 1, it is characterized in that：
Production method is as follows：
（1）The wet ore deposit stockyard of lateritic nickel ore enters laterite crusher in crushing after drying machine drying, and the material after crushing is laterite
Nickel minerals dry mine；Lateritic nickel ore dry mine is delivered to the storage of lateritic nickel ore dry mine stockyard；
（2）Lime stone flux raw material is delivered to stockyard storage after flux crusher in crushing；
（3）The material in lateritic nickel ore dry mine stockyard and flux stockyard is delivered to proportioning station and carries out dispensing, and the compound after dispensing is defeated
Deliver to stockyard storage；
（4）The mixed material in mixing mineral aggregate stockyard forms powdery mineral aggregate, the fineness of powdery mineral aggregate after vertical mill grinding<1.0mm；Powder
Shape mineral aggregate is delivered to material homogenizer storehouse storage homogenizing；
（5）The feeding bin at the top of feedstock transportation to suspension preheating prereduction device in material homogenizer storehouse, feeding bin continuously to
Suspension preheating prereduction device feeding, material move downward step by step from top, and reproducibility heat smoke moves upwards step by step from bottom,
The suspension preheating prereduction of material is completed in motion process；Described suspension preheating prereduction device be no less than two level,
Pre-reducing furnace is installed, pre-reducing furnace carries out prereduction to homogenizing mixing mineral aggregate before afterbody；
（6）Coal Stack Yard stores coal, and coal forms coal dust after coal milling mill, is delivered to Pulverized Coal Bin storage；A coal dust part is delivered to
Pre-reducing furnace completes burning, and produces partial reduction flue gas；Another part coal dust is delivered to the coal dust rifle of fusion reducing furnace, sprays into
Imperfect combustion is carried out in fusion reducing furnace, heat and reducing agent are provided for melting and reducing；
（7）The tail gas of suspension preheating prereduction device goes out through smoke washer, reduction deduster and reduction blower fan heel row, a part
Be delivered to drying machine drying material, by drying duster, drying blower fan after discharge；
（8）Oxygen made from oxygen generating station is delivered to the burner of fusion reducing furnace with coal gas or natural gas simultaneously, is provided for burning
Oxygen；
（9）600 ~ 800 DEG C of high temperature powder feed powder spirt of suspension preheating prereduction device afterbody output enters melting also
Former stove, under the reducing atmosphere of high temperature, the gradual melting and reducing of granular material, it is changed into liquid ferronickel and liquid slag；Liquid slag is through slag
Slag is formed after mouth discharge cooling；Liquid ferronickel forms ferronickel after tapping hole discharge cooling.
5. a kind of production method of suspension preheating melting and reducing ferronickel production equipment according to claim 1, it is characterized in that：
The exhanst gas outlet of described fusion reducing furnace is arranged in the middle part of fusion reducing furnace, and the reduction flue gas partial of system enters preheating in advance also
Prototype, heating and preliminary reducing material；Vertical Mill and coal mill are delivered to after the purified processing of another part high-temperature flue gas to be made for drying
With.
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|---|---|---|---|---|
| US3996045A (en) * | 1972-09-01 | 1976-12-07 | Pacific Metals Co., Ltd. | Method for producing high-grade ferro-nickel directly from nickeliferous oxide ores |
| CN101871053A (en) * | 2009-11-16 | 2010-10-27 | 云南锡业集团（控股）有限责任公司 | Method for smelting ferronickel or nismatte with laterite-nickel ore |
| CN106609325A (en) * | 2015-10-27 | 2017-05-03 | 中国恩菲工程技术有限公司 | Technology for reducing laterite nickel ore by smelting oxygen-enriched pulverized coal and smelting reduction furnace |
| CN207452218U (en) * | 2017-11-20 | 2018-06-05 | 徐州贝克福尔节能环保技术有限公司 | A kind of suspension preheating melting and reducing ferronickel production equipment |
-
2017
- 2017-11-20 CN CN201711159229.XA patent/CN107653382A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3996045A (en) * | 1972-09-01 | 1976-12-07 | Pacific Metals Co., Ltd. | Method for producing high-grade ferro-nickel directly from nickeliferous oxide ores |
| CN101871053A (en) * | 2009-11-16 | 2010-10-27 | 云南锡业集团（控股）有限责任公司 | Method for smelting ferronickel or nismatte with laterite-nickel ore |
| CN106609325A (en) * | 2015-10-27 | 2017-05-03 | 中国恩菲工程技术有限公司 | Technology for reducing laterite nickel ore by smelting oxygen-enriched pulverized coal and smelting reduction furnace |
| CN207452218U (en) * | 2017-11-20 | 2018-06-05 | 徐州贝克福尔节能环保技术有限公司 | A kind of suspension preheating melting and reducing ferronickel production equipment |
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Application publication date: 20180202 |