CN108411116A - A kind of lateritic nickel ore RKEF smelting processes smoke gas comprehensive treatment system and method - Google Patents
A kind of lateritic nickel ore RKEF smelting processes smoke gas comprehensive treatment system and method Download PDFInfo
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- CN108411116A CN108411116A CN201810465181.3A CN201810465181A CN108411116A CN 108411116 A CN108411116 A CN 108411116A CN 201810465181 A CN201810465181 A CN 201810465181A CN 108411116 A CN108411116 A CN 108411116A
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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
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/02—Working-up flue dust
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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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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
A kind of lateritic nickel ore RKEF smelting process smoke gas comprehensive treatment systems, including ferronickel electric furnace, water-cooled flue, the first bagroom, rotary kiln, cyclone dust collectors, burning wind mixed chamber, drying machine, the second bagroom, the lower end of the gas outlet connection water-cooled flue of ferronickel electric furnace, the upper end of water-cooled flue is connect by pipeline with the air inlet of the first bagroom, the gas outlet of first bagroom and the air inlet of rotary kiln are connected by pipeline, and the gas outlet of rotary kiln and the air inlet of cyclone dust collectors are connected by pipeline；Burning wind mixed chamber includes combustion chamber and flue gas mixing-chamber, and the air inlet of flue gas mixing-chamber and the gas outlet of cyclone dust collectors are connected by pipeline, and the air outlet of flue gas mixing-chamber and the air inlet of drying machine connect；The gas outlet of drying machine is connect with the air inlet of the second bagroom by pipeline.The present invention is energy saving, environmental protection, and flue gas utilization rate is high.
Description
Technical field
The invention belongs to flue gas during smelting technical field of comprehensive utilization, and in particular to a kind of lateritic nickel ore RKEF smelting process cigarettes
Gas total system and method.
Background technology
Smelting laterite-nickel ores technique is at present with the RKEF of pyrogenic process（Rotary kiln-mine of ferronickel is refined using smelting laterite-nickel ores
Hot stove technology）Technique is leading, and the comprehensive utilization of RKEF technique flue gas during smeltings is system stable operation, reduces the pass of energy consumption
Key link.There are following several techniques using wider fume treatment at present：
Technique 1：
Electric furnace flue gas processing system flow：Electric furnace flue gas → flue → air heat exchanger → bagroom → smoke exhaust fan → row
Sky, the hot wind of air heat exchanger heating is as rotary kiln burning wind.
Rotary kiln flue gas dust collection system flow：Rotary kiln flue gas → electric precipitator → smoke exhaust fan → emptying.
Drying machine flue gas dust collection flow：Drying machine flue gas → electric precipitator → induced-draft fan → emptying.
Technique typical case's achievement is：Burma reaches color nickel industry in tribute mountain.
Technique 2：
Electric furnace flue gas processing system flow：Electric furnace flue gas → flue → drying wind mixed chamber → drying machine.
Rotary kiln flue gas dust collection system flow：Rotary kiln flue gas → drying wind mixed chamber → drying machine.
Drying machine flue gas dust collection flow：Drying machine flue gas → electric precipitator → induced-draft fan → drying chimney.
Technique typical case's achievement is：The green hills group ferronickel projects such as wide blueness science and technology, century green hill.
By production practices, the problem of finding technique 1 and technique 2 there is following aspect：
（One）Technique 1:
（1）Ferronickel electric furnace semi-hermetic type operates, and the CO generated during reduction melting is burnt in stove by leaking out or air blast,
It generates about 800-900 DEG C of electric furnace flue gas and air heat exchanger is entered by flue.There are the dust in flue gas to hold in heat exchanger
It easily bonds, causes heat transfer effect bad；Flue-gas temperature fluctuation causes heat exchanger deformed damaged caused by electric furnace fluctuation.
（2）Flue dust in rotary kiln flue gas is collected in cottrell, and fume amount is big, and rotary kiln exhaust gas volumn is according to 100,000
Nm3/ h, dust contained flue gas 70g/Nm3It calculates, the Dust Capacity that hour is accepted is about 7t.
（3）The flue gas emission point of whole system is more, and environmental protection pressure is big.
（Two）Technique 2:
（1）Electric furnace semi-hermetic type operates, and the CO generated during reduction melting burns in stove, generates by leaking out or air blast
About 800-900 DEG C of electric furnace flue gas enters drying machine wind mixed chamber by flue.Rotary kiln flue gas also enters drying machine and mixes wind together
Room, as drying source.There are flue for electric furnace to be about 100m, and flue blockage is serious, and production must replace flue in about 1-2 months,
Influence production, overhaul it is expensive.
（2）Drying machine, rotary kiln, electric furnace flue gas provide negative pressure, system negative pressure by an induced-draft fan after dry gather dust
It is big to balance difficulty, stove vacuum cavitations are affected greatly.
Invention content
For a kind of insufficient existing for above-mentioned prior art, lateritic nickel ore RKEF smelting process smoke comprehensives of present invention offer
Processing system and method.
The present invention is achieved by the following technical solutions.
A kind of lateritic nickel ore RKEF smelting process smoke gas comprehensive treatment systems, which is characterized in that the system comprises ferronickels
Electric furnace, water-cooled flue, the first bagroom, rotary kiln, cyclone dust collectors, burning wind mixed chamber, drying machine, the second bag collection
Device；
The gas outlet of the ferronickel electric furnace and the lower end of water-cooled flue connect, and the upper end of the water-cooled flue passes through pipeline and first
The air inlet of bagroom connects, and the gas outlet of first bagroom and the air inlet of rotary kiln are connected by pipeline
It connects, the gas outlet of the rotary kiln and the air inlet of cyclone dust collectors are connected by pipeline；
The burning wind mixed chamber includes babinet, and the cabinet wall is equipped with the insulating layer made of refractory material, in the babinet
Equipped with vertical clapboard, babinet is divided into two chambers by the vertical clapboard, and one of chamber is combustion chamber, another chamber is
Flue gas mixing-chamber, the vertical clapboard lower part are provided with through-hole, and the top of the combustion chamber is provided with air inlet, fuel inlet, described
The top of flue gas mixing-chamber is equipped with air inlet, and the side wall of the flue gas mixing-chamber is provided with air outlet, the flue gas mixing-chamber into
The gas outlet of gas port and cyclone dust collectors is connected by pipeline, and the air outlet of the flue gas mixing-chamber and the air inlet of drying machine connect
It connects；The gas outlet of the drying machine is connect with the air inlet of the second bagroom by pipeline；
On the pipeline that the upper end of the water-cooled flue is connect with the first bagroom air inlet, the outlet of the first bagroom
On the pipeline that is connect with the air inlet of rotary kiln of mouth, the pipe that the air inlet of the gas outlet of cyclone dust collectors and flue gas mixing-chamber connects
Wind turbine is equipped on road.
According to above-mentioned processing system, which is characterized in that the air inlet of the rotary kiln, the second bagroom outlet
Mouthful, the air inlet of combustion chamber be respectively connected with wind turbine.
According to above-mentioned processing system, which is characterized in that the combustion chamber and the bottom of flue gas mixing-chamber are equipped with deashing
Mouthful, the both sides of the flue gas mixing-chamber are equipped with control valve, and the side wall of the combustion chamber is provided with flame-observing hole and explosionproof hole, institute
It states chamber fuel entrance and is equipped with burner.
According to above-mentioned processing system, which is characterized in that first bagroom, cyclone dust collectors and the second cloth bag
The flue dust outlet of dust-precipitator receives storehouse by Pneumatic conveyer and flue dust and connect, the flue dust reception storehouse and drying machine into
Material mouth is connected by pipeline.
According to above-mentioned processing system, which is characterized in that the gas outlets of the cyclone dust collectors and flue gas mixing-chamber into
Wind turbine on the pipeline of gas port connection is high-temperature blower.
According to above-mentioned processing system, which is characterized in that the upper end of the water-cooled flue and the first bagroom air inlet
Wind turbine on the pipeline of mouth connection is regulating fan.
According to above-mentioned processing system, which is characterized in that the gas outlet of first bagroom and rotary kiln into
Wind turbine on the pipeline of gas port connection is booster fan.
According to above-mentioned processing system, which is characterized in that the wind turbine of the gas outlet of second bagroom connection is
Smoke exhaust fan.
A kind of lateritic nickel ore RKEF smelting process smoke comprehensive processing methods using such as above-mentioned processing system, feature exist
In step includes：
（1）The electric furnace flue gas generated first to ferronickel electric furnace reduction by water-cooled flue cools down, and then uses the first cloth bag
Dust-precipitator carries out dust cleaning to electric furnace flue gas, is blasted purified electric furnace flue gas in rotary kiln using booster fan, then
Using the negative pressure in regulating fan adjustment ferronickel electric furnace；
（2）Dust cleaning is carried out to the flue gas that rotary kiln generates using cyclone dust collectors, after then being purified by high-temperature blower
Rotary kiln flue gas be passed through flue gas mixing-chamber, mix, mixed flue gas be passed through dry with the coal-fired flue gas generated in combustion chamber
It is contacted with wet lateritic nickel ore in dry machine；
（3）After carrying out dust cleaning to the flue gas that drying machine generates using the second bagroom, emptied by smoke exhaust fan.
According to above-mentioned method, which is characterized in that by the first bagroom, cyclone dust collectors, the second bagroom
It is sent into drying machine after being mixed with wet lateritic nickel ore after the flue dust wetting of collection and utilizes again.
According to above-mentioned method, which is characterized in that the step（1）The percent by volume of concentration containing CO is in electric furnace flue gas
40%-60%, 500 DEG C -600 DEG C of flue-gas temperature, dust content 35g/Nm3。
According to above-mentioned method, which is characterized in that the step（1）The water cooled flue of electric furnace flue gas is cooled to 80-100
DEG C, into after the first bagroom dedusting, dust content ＜ 80mg/Nm in flue gas3, ferronickel electric furnace is controlled by regulating fan
Interior negative pressure is 0-10 pas.
According to above-mentioned method, which is characterized in that the step（2）Rotary kiln flue-gas temperature is 400 DEG C, and dust content is
70g/Nm3。
According to above-mentioned method, which is characterized in that the step（2）The flue gas that rotary kiln is generated by cyclone dust collectors
It gathers dust, dust-collecting efficiency 20-40%；Dust concentration is 45g/Nm in flue gas after cyclone dust removal3, temperature is 350 DEG C, is led to
It is -10 pas to 0 pa to cross negative pressure in high-temperature blower control rotary kiln.
According to above-mentioned method, which is characterized in that the step（3）The flue-gas temperature that drying machine generates is 120 DEG C, flue gas
Dust content is 16g/Nm3, burning wind mixed chamber's negative pressure is by smoke exhaust fan control in -20 pas to -5 pas.
The advantageous effects of the present invention, the present invention provides a kind of lateritic nickel ore RKEF smelting process smoke gas comprehensive treatment systems
And method, the present invention have the advantage that compared with the prior art：
（1）The CO of the closed operation of ferronickel electric furnace, generation does not burn in stove so that electric furnace flue gas amount is prior art processes 1
With the 1/6-1/7 of 2 electric furnace flue gas amount of technique, electric furnace flue gas processing system scale is smaller；And temperature is about 500 DEG C, electric furnace furnace roof
Insulating element etc. is hardly damaged；Electric furnace negative pressure can be adjusted by regulating fan, not influenced by external factor compared with scheme 2.
（2）Dust-laden is about 7t/h in rotary kiln flue gas, but since 70% flue dust enters drying machine, what cyclone dust collectors were collected
Fume amount is about 2.1t/h, and fume amount is only the 30% of scheme 1, and rotary kiln negative pressure is adjusted by high-temperature blower, compared with scheme 2 not by
External factor influences.
（3）Rotary kiln flue gas as one of drying machine heat source compared with scheme 1, it is energy saving.Rotary kiln flue gas specific heat is about
1.47kj/Nm3DEG C, flue gas is in 350 DEG C of drying machine inlet temperature, 120 DEG C of drying machine exit gas temperature, rotary kiln exhaust gas volumn
According to 10Nm3/ h is calculated, and the heat of rotary kiln flue gas release is about 3.38 ten thousand MJ, saves drying machine combustion chambers burn 24Mj/kg
The fine coal of calorific value is about 1400kg/h.
（4）Burning wind mixed chamber, it has the function of two kinds of burning and mixed wind, has burning fuel the ability to provide heat, together
When wind mixed chamber can receive the heat smoke of about 350 DEG C of rotary kiln so that the fuel consumption of dry kiln system substantially reduces, Neng Gouqi
To energy-saving effect.The thermal energy in rotary kiln heat smoke is made full use of by the equipment, under identical working condition, drying machine
Save the fine coal about 1400kg/h that calorific value is 24Mj/kg in combustion chamber.
（5）The entire production line is only discharged by a smoke exhaust fan, and environmental protection pressure is smaller.
Description of the drawings
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is the process flow chart of the present invention.
Fig. 3 is the structural schematic diagram of the burning wind mixed chamber of the present invention.
Fig. 4 is the stereogram of present invention burning wind mixed chamber.
Specific implementation mode
The following describes the present invention in detail with reference to the accompanying drawings and specific embodiments.
As shown in Fig. 1,3 and 4, a kind of lateritic nickel ore RKEF smelting process smoke gas comprehensive treatment systems, including ferronickel electric furnace
1, water-cooled flue, the first bagroom 2, rotary kiln 3, cyclone dust collectors 4, burning wind mixed chamber 5, drying machine 6, the second cloth bag are received
Dirt device 7；The lower end of the gas outlet connection water-cooled flue of ferronickel electric furnace, the upper end of water-cooled flue passes through pipeline and the first bag collection
The air inlet of device connects, and the gas outlet of the first bagroom and the air inlet of rotary kiln are connected by pipeline, and rotary kiln goes out
The air inlet of gas port and cyclone dust collectors is connected by pipeline；
Burning wind mixed chamber includes babinet 8, and cabinet wall is equipped with insulating layer 9 made of refractory material, be equipped in babinet vertically every
The upper end of plate 10, vertical clapboard is connect with babinet inner top, and bottom connects in the lower end of vertical clapboard and babinet, and vertical clapboard will
Babinet is divided into left and right two chambers, wherein left chamber is combustion chamber 11, and right chamber is flue gas mixing-chamber 12, vertical clapboard lower part
It is provided with through-hole 13, hot combustion gas of the through-hole 13 for combustion chamber is passed through in flue gas mixing-chamber, is mixed with the flue gas in flue gas mixing-chamber,
The top of combustion chamber is provided with air inlet 14, fuel inlet 15, is equipped with burner at fuel inlet, the top of flue gas mixing-chamber is set
There are air inlet 16, the side wall of flue gas mixing-chamber to be provided with air outlet 17, the air inlet of flue gas mixing-chamber and the outlet of cyclone dust collectors
Mouth is connected by pipeline, and the air outlet 17 and the air inlet of drying machine of flue gas mixing-chamber are connected to and in communication with；The gas outlet of drying machine
It is connect by pipeline with the air inlet of the second bagroom；Combustion chamber and the bottom of flue gas mixing-chamber are equipped with cleaning door 18,
For deashing, the both sides of flue gas mixing-chamber are equipped with control valve i.e. cold blast sliding valve 19, for finely tuning flue gas mixing-chamber air outlet cigarette
The side wall of temperature degree, combustion chamber is provided with flame-observing hole and explosionproof hole, and flame-observing hole is for monitoring combustion case, explosionproof hole preferably two
A, when detonation improper for process conditions, discharges gas pressure inside, is fastened using bracing piece outside entire babinet；Rotary kiln
The fuel inlet of kiln hood and combustion chamber is all connected with quantitative feeder, for providing fuel.
Water-cooled flue includes the water-cooled jacket of interior welds steel inner container, and water-cooled jacket lower sidewall is arranged water inlet, on side wall
Water outlet is arranged in portion, and water-cooled flue is the steel device of water flowing cooling.The upper end of water-cooled flue and the first bagroom air inlet
On the pipeline of mouthful connection, on the pipeline of the air inlet connection of the gas outlet of the first bagroom and rotary kiln, cyclone dust collectors
Gas outlet and flue gas mixing-chamber air inlet connection pipeline on be equipped with wind turbine；The air inlet of rotary kiln, the second cloth bag are received
The gas outlet of dirt device, the air inlet of combustion chamber are all connected with wind turbine；Specifically, the upper end of water-cooled flue and the first bagroom into
The pipeline of gas port connection is equipped with regulating fan 20, the pipe of the gas outlet of the first bagroom and the air inlet connection of rotary kiln
Road is equipped with booster fan 21, and the pipeline that the gas outlet of cyclone dust collectors and the air inlet of flue gas mixing-chamber connect is equipped with high temperature
The gas outlet of wind turbine 22, the second bagroom is connected with smoke exhaust fan 23, and the air inlet of rotary kiln is connected with the first wind turbine 24
With the second wind turbine 25, the first wind turbine is used for the feeding secondary into rotary kiln for conveying First air, the second wind turbine into rotary kiln
Wind, the air inlet connection third wind turbine 26 and four fan device 27 of combustion chamber, third wind turbine are used to convey First air into combustion chamber,
Four fan device is used for the feeding secondary wind into combustion chamber.
The flue dust of the flue dust outlet of first bagroom, the flue dust outlet of cyclone dust collectors and the second bagroom goes out
Mouth receives storehouse with flue dust by Pneumatic conveyer and connect, and flue dust receives storehouse and the feed inlet of drying machine is connected by pipeline.
As shown in Fig. 2, a kind of lateritic nickel ore RKEF smelting processes smoke comprehensive processing method, step include：
（1）Ferronickel electric furnace reduction generates electric furnace flue gas, wherein the percent by volume of concentration containing CO is 40%-60%, cigarette in electric furnace flue gas
500 DEG C -600 DEG C of temperature degree, dust content 35g/Nm3；The electric furnace that ferronickel electric furnace reduction is generated by water-cooled flue first
Flue gas carries out being cooled to 80-100 DEG C, after then the first bagroom being used to carry out dust cleaning to electric furnace flue gas, in flue gas
Dust content ＜ 80mg/Nm3, purified electric furnace flue gas is blasted in rotary kiln using booster fan, electric furnace flue gas is used for back
One of fuel of rotary kiln, it is 0-10 pas to adjust the negative pressure in ferronickel electric furnace by regulating fan；
（2）Dust cleaning is carried out to the flue gas that rotary kiln generates using cyclone dust collectors, wherein rotary kiln flue-gas temperature is 400
DEG C, dust content 70g/Nm3, the dust-collecting efficiencies of cyclone dust collectors is 20-40%, cigarette in the rotary kiln flue gas after cyclone dust removal
Dust concentration is 45g/Nm3, temperature is 350 DEG C, and purified rotary kiln flue gas, which is then passed through flue gas, by high-temperature blower mixes
Room mix with the coal-fired flue gas generated in combustion chamber, as the heat source of drying machine, mixed flue gas be passed through drying machine it is interior with it is wet
Lateritic nickel ore is contacted, and wet lateritic nickel ore traps the flue dust in mixed flue gas；It is controlled back by high-temperature blower
Negative pressure is -10 pas to 0 pa in rotary kiln kiln；
（3）After carrying out dust cleaning to the flue gas that drying machine generates using the second bagroom, emptied by smoke exhaust fan；Its
In, the flue-gas temperature that drying machine generates is 120 DEG C, a concentration of 16g/Nm of dust contained flue gas3, burning wind mixed chamber negative pressure is by smoke exhaust fan
Control is in -20 pas to -5 pas；
（4）The flue dust that first bagroom, cyclone dust collectors, the second bagroom are collected is defeated by Pneumatic conveyer
It is sent to flue dust and receives storehouse, be sent into drying machine after being mixed with wet lateritic nickel ore after wetting and utilize again.
Embodiment 1
（1）Ferronickel electric furnace reduction generates electric furnace flue gas, wherein the percent by volume of concentration containing CO is 40% in electric furnace flue gas, flue gas temperature
500 DEG C of degree, dust content 35g/Nm3；The electric furnace flue gas generated first to ferronickel electric furnace reduction by water-cooled flue drops
Temperature is to 80 DEG C, after then the first bagroom being used to carry out dust cleaning to electric furnace flue gas, dust content ＜ 80mg/ in flue gas
Nm3, purified electric furnace flue gas is blasted in rotary kiln using booster fan, electric furnace flue gas is used for one of the fuel of rotary kiln,
It is 1 pa to adjust the negative pressure in ferronickel electric furnace by regulating fan；
（2）The flue gas generated to rotary kiln using cyclone dust collectors is gathered dust, wherein rotary kiln flue-gas temperature is 400 DEG C, is contained
Dust concentration is 70g/Nm3, the dust-collecting efficiency of cyclone dust collectors is 40%, and dust concentration is 45g/Nm in the flue gas after cyclone dust removal3,
Temperature is 350 DEG C, and the flue gas that rotary kiln generates then is passed through flue gas mixing-chamber by high-temperature blower, is produced with coal-fired in combustion chamber
Raw flue gas mixing, mixed flue gas is passed through in drying machine and is contacted with wet lateritic nickel ore, wet lateritic nickel ore is to mixing
The flue dust in flue gas afterwards is trapped；It is -10 pas to control negative pressure in rotary kiln by high-temperature blower；
（3）After carrying out dust cleaning to the flue gas that drying machine generates using the second bagroom, emptied by smoke exhaust fan；Its
In, the flue-gas temperature that drying machine generates is 120 DEG C, a concentration of 16g/Nm of dust contained flue gas3, burning wind mixed chamber negative pressure is by smoke exhaust fan
Control is in -20 pas；
（4）The flue dust that first bagroom, cyclone dust collectors, the second bagroom are collected is defeated by Pneumatic conveyer
It is sent to flue dust and receives storehouse, be sent into drying machine after being mixed with wet lateritic nickel ore after wetting and utilize again.
Embodiment 2
（1）Ferronickel electric furnace reduction generates electric furnace flue gas, wherein the percent by volume of concentration containing CO is 60% in electric furnace flue gas, flue gas temperature
600 DEG C of degree, dust content 35g/Nm3；The electric furnace flue gas generated first to ferronickel electric furnace reduction by water-cooled flue drops
Temperature is to 100 DEG C, after then the first bagroom being used to carry out dust cleaning to electric furnace flue gas, dust content ＜ in flue gas
80mg/Nm3, purified electric furnace flue gas is blasted in rotary kiln using booster fan, electric furnace flue gas is used for the fuel of rotary kiln
One of, it is 10 pas to adjust the negative pressure in ferronickel electric furnace by regulating fan；
（2）The flue gas generated to rotary kiln using cyclone dust collectors is gathered dust, wherein rotary kiln flue-gas temperature is 400 DEG C, is contained
Dust concentration is 70g/Nm3, the dust-collecting efficiency of cyclone dust collectors is 20%, and dust concentration is in the rotary kiln flue gas after cyclone dust removal
45g/Nm3, temperature is 350 DEG C, purified rotary kiln flue gas is then passed through flue gas mixing-chamber by high-temperature blower, with burning
The coal-fired flue gas mixing generated, mixed flue gas is passed through in drying machine and is contacted with wet lateritic nickel ore in room, wet laterite
Nickel minerals traps the flue dust in mixed flue gas；It is 0 pa to control negative pressure in rotary kiln by high-temperature blower；
（3）After carrying out dust cleaning to the flue gas that drying machine generates using the second bagroom, emptied by smoke exhaust fan；Its
In, the flue-gas temperature that drying machine generates is 120 DEG C, a concentration of 16g/Nm of dust contained flue gas3, burning wind mixed chamber negative pressure is by smoke exhaust fan
Control is in -5 pas；
（4）The flue dust that first bagroom, cyclone dust collectors, the second bagroom are collected is defeated by Pneumatic conveyer
It is sent to flue dust and receives storehouse, be sent into drying machine after being mixed with wet lateritic nickel ore after wetting and utilize again.
Above-described is only presently preferred embodiments of the present invention, not the limitation present invention.It should be understood that for this field
For those of ordinary skill, under technical inspiration provided by the present invention, other equivalent improvement can also be made, may be implemented
The purpose of the present invention is regarded as protection scope of the present invention.
Claims (15)
1. a kind of lateritic nickel ore RKEF smelting process smoke gas comprehensive treatment systems, which is characterized in that the system comprises ferronickel electricity
Stove, water-cooled flue, the first bagroom, rotary kiln, cyclone dust collectors, burning wind mixed chamber, drying machine, the second bag collection
Device；
The gas outlet of the ferronickel electric furnace and the lower end of water-cooled flue connect, and the upper end of the water-cooled flue passes through pipeline and first
The air inlet of bagroom connects, and the gas outlet of first bagroom and the air inlet of rotary kiln are connected by pipeline
It connects, the gas outlet of the rotary kiln and the air inlet of cyclone dust collectors are connected by pipeline；
The burning wind mixed chamber includes babinet, and the cabinet wall is equipped with the insulating layer made of refractory material, in the babinet
Equipped with vertical clapboard, babinet is divided into two chambers by the vertical clapboard, and one of chamber is combustion chamber, another chamber is
Flue gas mixing-chamber, the vertical clapboard lower part are provided with through-hole, and the top of the combustion chamber is provided with air inlet, fuel inlet, described
The top of flue gas mixing-chamber is equipped with air inlet, and the side wall of the flue gas mixing-chamber is provided with air outlet, the flue gas mixing-chamber into
The gas outlet of gas port and cyclone dust collectors is connected by pipeline, and the air outlet of the flue gas mixing-chamber and the air inlet of drying machine connect
It connects；The gas outlet of the drying machine is connect with the air inlet of the second bagroom by pipeline；
On the pipeline that the upper end of the water-cooled flue is connect with the first bagroom air inlet, the outlet of the first bagroom
On the pipeline that is connect with the air inlet of rotary kiln of mouth, the pipe that the air inlet of the gas outlet of cyclone dust collectors and flue gas mixing-chamber connects
Wind turbine is equipped on road.
2. processing system according to claim 1, which is characterized in that the air inlet of the rotary kiln, the second bag collection
The gas outlet of device, the air inlet of combustion chamber are respectively connected with wind turbine.
3. processing system according to claim 1, which is characterized in that the combustion chamber and the bottom of flue gas mixing-chamber are all provided with
There are cleaning door, the both sides of the flue gas mixing-chamber to be equipped with control valve, the side wall of the combustion chamber is provided with flame-observing hole and prevents
Blast hole, the chamber fuel entrance are equipped with burner.
4. processing system according to claim 1, which is characterized in that first bagroom, cyclone dust collectors and
The flue dust outlet of second bagroom receives storehouse with flue dust by Pneumatic conveyer and connect, and the flue dust receives storehouse and does
The feed inlet of dry machine is connected by pipeline.
5. processing system according to claim 1, which is characterized in that the gas outlet of the cyclone dust collectors is mixed with flue gas
Wind turbine on the pipeline of the air inlet connection of room is high-temperature blower.
6. processing system according to claim 1, which is characterized in that the upper end of the water-cooled flue and the first bag collection
Wind turbine on the pipeline of device air inlet connection is regulating fan.
7. processing system according to claim 1, which is characterized in that the gas outlet of first bagroom and revolution
Wind turbine on the pipeline of the air inlet connection of kiln is booster fan.
8. processing system according to claim 1, which is characterized in that the gas outlet connection of second bagroom
Wind turbine is smoke exhaust fan.
9. it is a kind of using as claim 1-8 arbitrarily as described in processing system lateritic nickel ore RKEF smelting process smoke comprehensives processing
Method, which is characterized in that its step includes：
（1）The electric furnace flue gas generated first to ferronickel electric furnace reduction by water-cooled flue cools down, and then uses the first cloth bag
Dust-precipitator carries out dust cleaning to electric furnace flue gas, is blasted purified electric furnace flue gas in rotary kiln using booster fan, then
Using the negative pressure in regulating fan adjustment ferronickel electric furnace；
（2）Dust cleaning is carried out to the flue gas that rotary kiln generates using cyclone dust collectors, after then being purified by high-temperature blower
Rotary kiln flue gas be passed through flue gas mixing-chamber, mix, mixed flue gas be passed through dry with the coal-fired flue gas generated in combustion chamber
It is contacted with wet lateritic nickel ore in dry machine；
（3）After carrying out dust cleaning to the flue gas that drying machine generates using the second bagroom, emptied by smoke exhaust fan.
10. according to the method described in claim 9, it is characterized in that, by the first bagroom, cyclone dust collectors, the second cloth
It is sent into drying machine after being mixed with wet lateritic nickel ore after the flue dust wetting that bag collector is collected and utilizes again.
11. according to the method described in claim 9, it is characterized in that, the step（1）The volume of concentration containing CO hundred in electric furnace flue gas
Divide than being 40%-60%, 500 DEG C -600 DEG C of flue-gas temperature, dust content 35g/Nm3。
12. according to the method described in claim 9, it is characterized in that, the step（1）The water cooled flue of electric furnace flue gas is cooled to
80-100 DEG C, into after the first bagroom dedusting, dust content ＜ 80mg/Nm in flue gas3, nickel is controlled by regulating fan
Negative pressure in ferroelectricity stove is 0-10 pas.
13. according to the method described in claim 9, it is characterized in that, the step（2）Rotary kiln flue-gas temperature is 400 DEG C, is contained
Dust concentration is 70g/Nm3。
14. according to the method described in claim 9, it is characterized in that, the step（2）Rotary kiln is produced by cyclone dust collectors
Raw flue gas gathers dust, dust-collecting efficiency 20-40%；Dust concentration is 45g/Nm in flue gas after cyclone dust removal3, temperature is
350 DEG C, it is -10 pas to 0 pa to control negative pressure in rotary kiln by high-temperature blower.
15. according to the method described in claim 9, it is characterized in that, the step（3）Drying machine generate flue-gas temperature be
120 DEG C, a concentration of 16g/Nm of dust contained flue gas3, burning wind mixed chamber's negative pressure is by smoke exhaust fan control in -20 pas to -5 pas.
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