CN108441650A - Nickel slag dilution device - Google Patents
Nickel slag dilution device Download PDFInfo
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- CN108441650A CN108441650A CN201810638120.2A CN201810638120A CN108441650A CN 108441650 A CN108441650 A CN 108441650A CN 201810638120 A CN201810638120 A CN 201810638120A CN 108441650 A CN108441650 A CN 108441650A
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- Prior art keywords
- nickel slag
- nickel
- dilution
- slag
- treatment furnace
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 478
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 239
- 239000002893 slag Substances 0.000 title claims abstract description 227
- 238000010790 dilution Methods 0.000 title claims abstract description 144
- 239000012895 dilution Substances 0.000 title claims abstract description 144
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 64
- 239000000428 dust Substances 0.000 claims abstract description 63
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 62
- 230000008676 import Effects 0.000 claims abstract description 23
- 230000009467 reduction Effects 0.000 claims abstract description 23
- RWSOTUBLDIXVET-UHFFFAOYSA-O sulfonium Chemical compound [SH3+] RWSOTUBLDIXVET-UHFFFAOYSA-O 0.000 claims abstract description 23
- 238000005485 electric heating Methods 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims description 36
- 239000000654 additive Substances 0.000 claims description 28
- 230000000996 additive effect Effects 0.000 claims description 27
- 238000011084 recovery Methods 0.000 claims description 23
- 238000010438 heat treatment Methods 0.000 claims description 15
- 239000007789 gas Substances 0.000 claims description 10
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 8
- 239000003546 flue gas Substances 0.000 claims description 8
- 239000002918 waste heat Substances 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 7
- 239000000779 smoke Substances 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000003638 chemical reducing agent Substances 0.000 abstract description 12
- 229910000480 nickel oxide Inorganic materials 0.000 abstract description 7
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 abstract description 7
- 239000000155 melt Substances 0.000 abstract description 6
- 229910017052 cobalt Inorganic materials 0.000 description 33
- 239000010941 cobalt Substances 0.000 description 33
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 33
- 239000010949 copper Substances 0.000 description 21
- 229910052751 metal Inorganic materials 0.000 description 20
- 239000002184 metal Substances 0.000 description 20
- 238000006722 reduction reaction Methods 0.000 description 18
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 14
- 229910052802 copper Inorganic materials 0.000 description 14
- 230000008569 process Effects 0.000 description 12
- 239000010410 layer Substances 0.000 description 11
- 238000003113 dilution method Methods 0.000 description 8
- 230000001698 pyrogenic effect Effects 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000003723 Smelting Methods 0.000 description 6
- 229910000428 cobalt oxide Inorganic materials 0.000 description 6
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 150000002739 metals Chemical class 0.000 description 4
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 4
- 229910052683 pyrite Inorganic materials 0.000 description 4
- 239000011028 pyrite Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 239000012792 core layer Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241001417490 Sillaginidae Species 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- WZOZCAZYAWIWQO-UHFFFAOYSA-N [Ni].[Ni]=O Chemical compound [Ni].[Ni]=O WZOZCAZYAWIWQO-UHFFFAOYSA-N 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000012840 feeding operation 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
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 230000005226 mechanical processes and functions Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000013528 metallic particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000009182 swimming Effects 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
- 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
- C22B7/001—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
- 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
- C22B7/04—Working-up slag
-
- 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
Abstract
The present invention provides a kind of nickel slag dilution devices.The device includes nickel slag dilution treatment furnace and Yarn feeding device, nickel slag dilution treatment furnace is using electric heating or plasma heat as heat source, nickel slag dilution treatment furnace is provided with the import of nickel slag, line feeding hole and puts sulfonium mouth, and the import of nickel slag puts sulfonium mouth the nickel matte that reduction dilution is handled is discharged to be passed through nickel slag；Yarn feeding device is used to feed carbon dust line into nickel slag dilution treatment furnace by line feeding hole to carry out reduction dilution processing to nickel slag.The device is fed carbon dust line in nickel slag dilution treatment furnace using Yarn feeding device, then carries out reduction dilution processing to nickel slag as heat source using electric heating or plasma heat.Can directly carbon dust line be fed in the melt layer of the slag middle and lower part in furnace body using the device, so as to make melt contacts of the carbon dust in carbon dust line more fully with slag middle and lower part, the function of playing reducing agent, nickel matte is reduced under higher dilution dynamic conditions by the nickel oxide in nickel slag.
Description
Technical field
The present invention relates to metal smelt technical fields, in particular to a kind of nickel slag dilution device.
Background technology
During the nickel fibers of the prior art, often smelts 1 ton of nickel and will produce 2~5 tons of nickel slag, the gold such as nickel, cobalt in nickel slag
It is higher to belong to content.Nickel content in the nickel slag of different smelting process outputs is different, the nickel content 0.8~4% of usual nickel slag, in addition
It is usually 0.3%~2% also to contain metals, the cobalt contents such as cobalt (Co), copper (Cu) in part of nickel slag, and copper content is usually 0.5%
~2%.
Currently, domestic nickel slag mainly uses pyrogenic process dilution technology, it is that yellow iron is added in high temperature furnace during pyrogenic process dilution
Mine is reacted with reducing agent lump coal.However, due to reducing agent lump coal since proportion is small, it is easy to float on slag top, can makes
It is burned heat release at most of reducing agent, the metal oxide of slag middle and lower part is difficult to touch the reducing agent for swimming in top,
Dilution dynamic conditions is poor, this directly results in the lengthening in nickel slag dilution period, generally requires 3~7h, has seriously affected production
Efficiency.
Invention content
The main purpose of the present invention is to provide a kind of nickel slag dilution devices, to solve to utilize pyrogenic process dilution in the prior art
When technical finesse nickel slag the problem of existing low production efficiency.
To achieve the goals above, according to an aspect of the invention, there is provided a kind of nickel slag dilution device comprising：
Nickel slag dilution treatment furnace, using electric heating or plasma heat as heat source, nickel slag dilution treatment furnace is provided with the import of nickel slag, line feeding hole and puts
Sulfonium mouth, the import of nickel slag put sulfonium mouth the nickel matte that reduction dilution is handled is discharged to be passed through nickel slag；Yarn feeding device is used for
Carbon dust line is fed to carry out reduction dilution processing to nickel slag into nickel slag dilution treatment furnace by line feeding hole.
Further, nickel slag dilution treatment furnace is ore-smelting electric furnace or plasma heating furnace.
Further, nickel slag dilution treatment furnace includes：Furnace body, the import of nickel slag and line feeding hole are arranged at the top of furnace body, put
The side-lower in furnace body is arranged in sulfonium mouth, and electrode hole is additionally provided on furnace body；Electrode is heated, heating electrode extends across electrode hole
To the content of furnace body, to furnace body heat supply.
Further, line feeding hole is multiple, and multiple line feeding pore size distributions are at the top of furnace body.
Further, line feeding hole is 3~8, and the aperture in line feeding hole is 30~100mm.
Further, furnace body relative to the side lower part for putting sulfonium mouth is additionally provided with slag tap, and slag tap is being discharged also
The clinker of output in former dilution processing procedure.
Further, nickel slag dilution device further includes slag cooler, and slag cooler is to stove that slag tap is discharged
Slag is cooled down.
Further, it is additionally provided with additive entrance at the top of furnace body, additive entrance is being passed through additive.
Further, additive entrance and nickel slag import are co-located.
Further, nickel slag dilution device further includes additive storage bin, and additive storage bin is connected with additive entrance.
Further, nickel slag dilution treatment furnace is additionally provided with offgas outlet, and nickel slag dilution device further includes：Waste heat recovery fills
It sets, is provided with heat smoke import and cold flue gas outlet, heat smoke import is connected with offgas outlet；Dust arrester installation, dust arrester installation with
Cold flue gas outlet is connected.
The present invention provides a kind of nickel slag dilution devices comprising nickel slag dilution treatment furnace and Yarn feeding device, nickel slag dilution
Treatment furnace is using electric heating or plasma heat as heat source, and nickel slag dilution treatment furnace is provided with the import of nickel slag, line feeding hole and puts sulfonium mouth, nickel slag
Import puts sulfonium mouth the nickel matte that reduction dilution is handled is discharged to be passed through nickel slag；Yarn feeding device is used to pass through line feeding hole
Carbon dust line is fed into nickel slag dilution treatment furnace to carry out reduction dilution processing to nickel slag.
Using nickel slag dilution device provided by the invention, carbon dust line is fed by nickel slag dilution treatment furnace using wire injection procedure
In, reduction dilution processing is then carried out to nickel slag as heat source using electric heating or plasma heat.Compared to traditional pyrogenic process dilution technique, originally
Invention can directly be fed carbon dust line in the melt layer of the slag middle and lower part in furnace body by Yarn feeding device.It can make carbon in this way
Melt contacts of the carbon dust more fully with slag middle and lower part in chalk line, play the function of reducing agent, in higher dilution
The nickel oxide in nickel slag is reduced to nickel matte under dynamic conditions, and (wherein a small amount of cobalt/cobalt oxide, Cu oxide can also be gone back
Originally it was corresponding metal sulfonium).Based on the above reason, nickel slag can be effectively improved using nickel slag dilution device provided by the invention
Restore dilution efficiency.
Description of the drawings
The accompanying drawings which form a part of this application are used to provide further understanding of the present invention, and of the invention shows
Meaning property embodiment and its explanation are not constituted improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 shows the nickel slag dilution schematic device according to an embodiment of the present invention.
Wherein, above-mentioned attached drawing includes the following drawings label：
10, nickel slag dilution treatment furnace；11, furnace body；12, electrode is heated；20, Yarn feeding device；30, waste-heat recovery device；40、
Dust arrester installation；50, additive storage bin；
A, nickel slag；B, carbon dust line；C, nickel matte；D, clinker；E, tail gas.
Specific implementation mode
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
The application is described in further detail below in conjunction with specific embodiment, these embodiments should not be understood as limitation originally
Apply for range claimed.
As described in background technology part, there is production when utilizing pyrogenic process dilution technical finesse nickel slag in the prior art
The low problem of efficiency.
To solve the above-mentioned problems, the present invention provides a kind of nickel slag dilution devices, as shown in Figure 1 comprising nickel slag is poor
Change treatment furnace 10 and Yarn feeding device 20, nickel slag dilution treatment furnace 10 is using electric heating or plasma heat as heat source, nickel slag dilution treatment furnace
10 are provided with the import of nickel slag, line feeding hole and put sulfonium mouth, and the import of nickel slag puts sulfonium mouth dilution processing is discharged to be passed through nickel slag a
Obtained nickel matte c；Yarn feeding device 20 be used for by line feeding hole fed into nickel slag dilution treatment furnace 10 carbon dust line b with to nickel slag into
Row reduction dilution processing.
It, can be by the liquid nickel slag of nickel fibers stove output through chute or cinder ladle using nickel slag dilution device provided by the invention
Be transported in nickel slag dilution treatment furnace 10, then use wire injection procedure by carbon dust line feed nickel slag dilution treatment furnace in, then with
Electric heating or plasma heat are that heat source carries out reduction dilution processing to nickel slag.Compared to traditional pyrogenic process dilution technique, the present invention passes through
Yarn feeding device 20 can directly feed carbon dust line in the melt layer of the slag middle and lower part in 10 furnace body of nickel slag dilution treatment furnace.This
Sample can make melt contacts of the carbon dust more fully with slag middle and lower part in carbon dust line, play the function of reducing agent, thus
The nickel oxide in nickel slag is reduced to nickel matte under higher dilution dynamic conditions, and (wherein a small amount of cobalt/cobalt oxide, copper aoxidize
Object can also be reduced to corresponding metal sulfonium).It, can be effective using nickel slag dilution device provided by the invention based on the above reason
The reduction dilution efficiency for improving nickel slag, is embodied in：It can effectively shorten dilution period of nickel slag, and applicable nickel slag range
Extensively, metal recovery rate is high, and the tenors such as nickel, cobalt, copper in clinker are low.
During practical dilution, the admission velocity of carbon dust line is controlled by Yarn feeding device 20, carbon dust (lacks after entering melt with nickel
Measure cobalt, copper) oxide reaction, generate CO, CO2Gas will be reduced into metal simple-substance state with metal existing for oxidation state,
The sedimentation of other metals such as nickel is simultaneously discharged by putting sulfonium mouth.During gas is escaped by melt, additionally it is possible to play the stirring to melt and make
With can also promote metallic particles agglomeration in this way and settle, to promote the progress of reduction reaction.
In a preferred embodiment, nickel slag dilution treatment furnace 10 is ore-smelting electric furnace or plasma heating furnace.Utilize mine heat
Electric furnace or plasma heating furnace can provide stable heat for the dilution process of nickel slag, and the carbon dust line being added substantially can be complete
Reducing agent is served as, dilution dynamic conditions can be further improved, improves production efficiency.
For the purpose for saving production cost and equipment cost, in a preferred embodiment, as shown in Figure 1, nickel
Slag dilution treatment furnace 10 includes furnace body 11 and heating electrode 12, and the import of nickel slag and line feeding hole are arranged at the top of furnace body 11, put sulfonium
The side-lower in furnace body 11 is arranged in mouth, and is additionally provided with electrode hole on furnace body 11；Heating electrode 12 extends to stove across electrode hole
The content of body 11, to 11 heat supply of furnace body.In actual mechanical process, powered to heating electrode 12 by power supply, Jin Erli
With heating electrode 12 heat supply is carried out for the nickel slag system inside furnace body 11.The number of above-mentioned heating electrode 12 can be according to furnace body 11
Capacity, nickel Slag treatment amount are adjusted, this is that those skilled in the art should be understood that.
In order to more easily carry out line feeding operation, and the height of line feeding is more easily controlled, in a kind of preferred embodiment party
In formula, line feeding hole is multiple, and multiple line feeding pore size distributions are at the top of furnace body 11.By line feeding pore size distribution at the top of furnace body 11, lead to
Yarn feeding device 20 is crossed by behind carbon dust line feeding line feeding hole, carbon dust line can enter under the gravity of itself inside melt to be connect with melt
It touches, and control line end height should be facilitated in the process.In addition, multiple line feeding holes are arranged, carbon dust line can be fed in different positions,
Be conducive to further increase the efficiency of dilution reduction.Preferably, line feeding hole is 3~8, and the aperture in line feeding hole is 30~100mm.
In a preferred embodiment, furnace body 11 relative to the side lower part for putting sulfonium mouth is additionally provided with slag tap,
Slag tap restores the clinker d of output in dilution processing procedure to be discharged.As shown in Figure 1, in actual production process, furnace body
In dilution system in 11, underlying is nickel matte (comprising other a small amount of metal sulfoniums), and superposed is to float on melt
Some slags on surface.Therefore, these slags can be discharged using slag tap.Preferably, nickel slag dilution device further includes slag
Cooling device, slag cooler cool down to the clinker d that slag tap is discharged.Ability may be used in the specific type of cooling
Domain common methods for cooling, such as water quenching etc..
In order to further increase the dilution effect of nickel slag, in a preferred embodiment, the top of furnace body 11 is also set
It is equipped with additive entrance, additive entrance is being passed through additive.The additive can be vulcanizing agent, trapping agent etc., be conducive to
The nickel matte grade in clinker is reduced, the rate of recovery of nickel is further increased.
In a preferred embodiment, additive entrance and nickel slag import are co-located.It in this way can be same
Additive and nickel slag is added in one position, improves operation ease.Preferably, nickel slag dilution device further includes additive storage bin 50,
Additive storage bin 50 is connected with additive entrance, to provide additive.
In a preferred embodiment, nickel slag dilution treatment furnace 10 is additionally provided with offgas outlet, nickel slag dilution device
Further include waste-heat recovery device 30 and dust arrester installation 40, waste-heat recovery device 30 is provided with heat smoke import and cold flue gas outlet,
Heat smoke import is connected with offgas outlet；Dust arrester installation 40 is connected with cold flue gas outlet.It on the one hand can recycle in tail gas e in this way
Waste heat be used, on the one hand can also reduce granular material discharged, improve the feature of environmental protection of device.
According to another aspect of the present invention, a kind of nickel slag dilution method is additionally provided, as shown in Figure 1, its device for using
Including nickel slag dilution treatment furnace 10 and Yarn feeding device 20, nickel slag dilution treatment furnace 10 is using electric heating or plasma heat as heat source, nickel slag
Dilution treatment furnace 10 is provided with the import of nickel slag, line feeding hole and puts sulfonium mouth；Nickel slag dilution method includes the following steps：By nickel slag into
Nickel slag a is passed through in nickel slag dilution treatment furnace 10 by mouth；Using Yarn feeding device 20 by line feeding hole into nickel slag dilution treatment furnace 10
Feed carbon dust line b；Under the action of electric heating or plasma heat, reduction dilution is carried out to nickel slag a using carbon dust line b and is handled.
Using nickel slag dilution method provided by the invention, carbon dust line is fed by nickel slag dilution treatment furnace using wire injection procedure
In, reduction dilution processing is then carried out to nickel slag as heat source using electric heating or plasma heat.Compared to traditional pyrogenic process dilution technique, originally
Carbon dust line can directly be fed the molten of the slag middle and lower part in 10 furnace body of nickel slag dilution treatment furnace by Yarn feeding device 20 by invention
In body layer.It can make melt contacts of the carbon dust more fully with slag middle and lower part in carbon dust line in this way, play the work(of reducing agent
Can, to which the nickel oxide in nickel slag is reduced to nickel matte c (wherein a small amount of cobalt oxidations under higher dilution dynamic conditions
Object, Cu oxide can also be reduced to corresponding metal sulfonium).Based on the above reason, nickel slag provided by the invention dilution side is utilized
Method can effectively improve the reduction dilution efficiency of nickel slag, be embodied in：It can effectively shorten dilution period of nickel slag, and be applicable in
Nickel slag range it is wide, metal recovery rate is high, and the tenors such as nickel, cobalt, copper in clinker are low.
In a preferred embodiment, nickel slag dilution treatment furnace 10 is ore-smelting electric furnace or plasma heating furnace.Utilize mine heat
Electric furnace or plasma heating furnace can provide stable heat for the dilution process of nickel slag, and the carbon dust line being added substantially can be complete
Reducing agent is served as, dilution dynamic conditions can be further improved, improves production efficiency.
In a preferred embodiment, in the step of restoring dilution processing, while to nickel slag dilution treatment furnace 10
In be passed through additive participate in reduction dilution processing；Preferably, additive is one kind or more in pyrite, sulphur and low nickel matte
Kind.These additives are added and advantageously reduce nickel matte grade in clinker, further increase the rate of recovery of nickel.
Nickel slag dilution processing is carried out based on special wire injection procedure so that the nickel slag range that technique provided by the invention uses
Wider, in a preferred embodiment, nickel content is 0.8~4wt% in nickel slag, and cobalt content is 0.3~2%, copper content
It is 0.5~2%.
In order to further increase nickel slag dilution efficiency and nickel (other metals such as a small amount of cobalt, copper) the rate of recovery, in one kind
In preferred embodiment, the addition of additive is the 1~20% of nickel slag weight.It is highly preferred that by the carbon dust line of addition
Carbon dust weight be denoted as A, by nickel oxide, cobalt/cobalt oxide and Cu oxide in nickel slag be reduced required theory with carbon weight remember
For B, wherein A/B=0.8~2.0." nickel oxide, cobalt/cobalt oxide and Cu oxide are reduced required theory in nickel slag herein
With carbon weight " refer to the theoretical carbon amounts being reduced to these oxides needed for metal simple-substance.
The carbon dust line used in the above-mentioned dilution method of the present invention can be presently commercially available carbon dust line, in a kind of preferred reality
It applies in mode, a diameter of 10~30mm of carbon dust line, the carbon powder content in carbon dust line is 50~98%.It is highly preferred that carbon dust line
Including carbon dust sandwich layer and the metal sheath for being coated on carbon dust core layer surface, metal sheath is iron sheet or aluminium skin, preferably metal sheath
Thickness be 0.1~0.5mm.Metal sheath in the melt for entering furnace body 11 after can occur high temperature melting, or with other metals
It is dissolved in slag after oxide reaction oxidation.
In a preferred embodiment, in the step of feeding carbon dust line, the line end of carbon dust line is placed at nickel slag
In melt layer in dilution treatment furnace 10, and the interior bottom wall of nickel slag dilution treatment furnace 10 is denoted as H away from slag layer height, by nickel
Line end height of the interior bottom wall of slag dilution treatment furnace 10 away from carbon dust line is denoted as h, wherein h/H=1/3~1/2.In this way, on the one hand
Contact of the carbon dust line with melt is more abundant, and more preferably, the metal oxide in the middle part of another aspect molten bath completes reduction to dilution condition
After reaction, molten bath bottom can be entered by settlement action, relatively stable nickel matte layer is formed, facilitates discharge nickel matte.
As it was noted above, the nickel slag dilution technique based on the present invention has preferable dynamic conditions, can effectively shorten
The dilution period.In a preferred embodiment, the temperature of reduction dilution processing is 1200~1400 DEG C, and the time is 1~3h.
In a preferred embodiment, nickel matte c, clinker d and tail gas c have been obtained in the step of reduction dilution processing,
Nickel slag dilution method further includes the steps that carrying out Water Quenching to clinker.
In a preferred embodiment, nickel slag dilution method further includes the steps that being post-processed to tail gas, rear to locate
Managing step includes：Waste heat recovery processing is carried out to tail gas, obtains cold flue gas；Processing of gathering dust is carried out to cold flue gas.So on the one hand
The waste heat that can be recycled in tail gas is used, and on the one hand can also reduce granular material discharged, improves the feature of environmental protection of device.
It should be noted that in actual dilution processing procedure, reducing agent can form CO or CO after participating in dilution2, tail
A part of combustible can be carried in gas secretly, this part combustible be located above slag also can generating unit divided combustion, carried for furnace body 11
Heating load.
The advantageous effect further illustrated the present invention by the following examples：
Embodiment 1
The dilution of nickel slag is carried out using the dilution device of nickel slag shown in Fig. 1, wherein nickel slag dilution treatment furnace is as shown in Figure 1, stove
Body is internally provided with three heating electrodes, and the volume for the part that electrode extends in cavity accounts for the 4% of cavity total measurement (volume), electrode
Power density is 200kW/m2, process conditions are as follows：
Nickel slag is added in stove, promotes the temperature of slag in stove to 1350 DEG C；Start carbon dust line carrying out line feeding (above furnace body
It is provided with 5 line feeding holes), carbon dust line includes carbon dust sandwich layer and is coated on the iron sheet of carbon dust core layer surface, and thickness of scale is
0.1mm, a diameter of 10mm of carbon dust line, carbon powder content 98%；Carbon dust weight in the carbon dust line of addition is denoted as A, by nickel
Nickel oxide, cobalt/cobalt oxide and Cu oxide are reduced required theory and are denoted as B, wherein A/B=0.8 with carbon weight in slag.Hello
In line process, the line end of carbon dust line is placed in the melt layer in nickel slag dilution treatment furnace, and by nickel slag dilution treatment furnace
Interior bottom wall is denoted as H away from slag layer height, and line end height of the interior bottom wall of nickel slag dilution treatment furnace away from carbon dust line is denoted as h,
Wherein h/H=1/3；Pyrite is added in furnace body and further traps the nickel metal in slag, addition is smelting slag total weight
3%；Gained nickel matte Returning smelting stove.
Handling result：Handle 200,000 tons of nickel slag, nickel slag nickeliferous 1.2% year, cupric 0.95% contains cobalt 0.76%；At nickel slag
Clinker nickeliferous 0.10% after reason, cupric 0.23% contain cobalt 0.09%；The nickel grade of nickel matte is 23.05%.Whole system nickel recycles
Rate about 95.4%, the cobalt rate of recovery is about 91.5%, copper recovery 73.8%.
Embodiment 2
The device and technique of use with embodiment 1, the difference is that：H/H=1/2.
Handling result：Handle 190,000 tons of nickel slag, nickel slag nickeliferous 1.2% year, cupric 0.95% contains cobalt 0.76%；At nickel slag
Clinker nickeliferous 0.15% after reason, cupric 0.28% contain cobalt 0.12%；The nickel grade of nickel matte is 22.3%.Whole system nickel recycles
Rate about 93.8%, the cobalt rate of recovery is about 90.1%, copper recovery 70.2%.
Embodiment 3
The device and technique of use with embodiment 1, the difference is that：H/H=2/3.
Handling result：Handle 170,000 tons of nickel slag, nickel slag nickeliferous 1.2% year, cupric 0.95% contains cobalt 0.76%；At nickel slag
Clinker nickeliferous 0.23% after reason, cupric 0.31% contain cobalt 0.15%；The nickel grade of nickel matte is 21.7%.Whole system nickel recycles
Rate about 91.7%, the cobalt rate of recovery is about 90.0%, copper recovery 70.3%.
Embodiment 4
The device and technique of use with embodiment 1, the difference is that：The addition of pyrite is nickel slag total weight
5%, A/B=2.0.
Handling result：Handle 230,000 tons of nickel slag, nickel slag nickeliferous 1.0% year, cupric 0.82% contains cobalt 0.69%；At nickel slag
Clinker nickeliferous 0.08% after reason, cupric 0.20% contain cobalt 0.07%；The nickel grade of nickel matte is 24.62%.Whole system nickel recycles
Rate about 96.7%, the cobalt rate of recovery is about 92.8%, copper recovery 76.4%.
Embodiment 5
The device and technique of use with embodiment 1, the difference is that：The addition of pyrite is nickel slag total weight
1%, A/B=0.7.
Handling result：Handle 180,000 tons of nickel slag, nickel slag nickeliferous 1.2% year, cupric 0.95% contains cobalt 0.76%；At nickel slag
Clinker nickeliferous 0.13% after reason, cupric 0.29% contain cobalt 0.14%；The nickel grade of nickel matte is 21.00%.Whole system nickel recycles
Rate about 93.0%, the cobalt rate of recovery is about 89.4%, copper recovery 70.8%.
Comparative example 1
The device and technique of use with embodiment 1, the difference is that：Do not use wire injection procedure, but by the carbon of equivalent
Powder is directly added in by charging aperture in furnace body.
Handling result：Handle 120,000 tons of nickel slag, nickel slag nickeliferous 1.2% year, cupric 0.95% contains cobalt 0.76%；At nickel slag
Clinker nickeliferous 0.25% after reason, cupric 0.59% contain cobalt 0.45%；The nickel grade of nickel matte is 16.00%.Whole system nickel recycles
Rate about 81.5%, the cobalt rate of recovery is about 84.2%, copper recovery 60.3%.
It can be seen from the above description that the above embodiments of the present invention realize following technique effect：
Using nickel slag dilution device provided by the invention, carbon dust line is fed by nickel slag dilution treatment furnace using wire injection procedure
In, reduction dilution processing is then carried out to nickel slag as heat source using electric heating or plasma heat.Compared to traditional pyrogenic process dilution technique, originally
Invention can directly be fed carbon dust line in the melt layer of the slag middle and lower part in furnace body by Yarn feeding device.It can make carbon in this way
Melt contacts of the carbon dust more fully with slag middle and lower part in chalk line, play the function of reducing agent, in higher dilution
The nickel oxide in nickel slag is reduced to nickel matte under dynamic conditions, and (wherein a small amount of cobalt/cobalt oxide, Cu oxide can also be gone back
Originally it was corresponding metal sulfonium).Based on the above reason, nickel slag can be effectively improved using nickel slag dilution device provided by the invention
Restore dilution efficiency.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (11)
1. a kind of nickel slag dilution device, which is characterized in that including：
Nickel slag dilution treatment furnace (10), using electric heating or plasma heat as heat source, the nickel slag dilution treatment furnace (10) is provided with nickel
Slag import, line feeding hole and sulfonium mouth is put, the nickel slag import is described to put sulfonium mouth reduction dilution is discharged to be passed through the nickel slag
Handle obtained nickel matte；And
Yarn feeding device (20), for feeding carbon dust line into the nickel slag dilution treatment furnace (10) with to institute by the line feeding hole
It states nickel slag and carries out the reduction dilution processing.
2. nickel slag dilution device according to claim 1, which is characterized in that the nickel slag dilution treatment furnace (10) is mine heat
Electric furnace or plasma heating furnace.
3. nickel slag dilution device according to claim 1, which is characterized in that the nickel slag dilution treatment furnace (10) includes：
Furnace body (11), the nickel slag import and line feeding hole setting are arranged in the top of the furnace body (11), the sulfonium mouth of putting
Side-lower in the furnace body (11), and it is additionally provided with electrode hole on the furnace body (11)；And
Electrode (12) is heated, the heating electrode (12) extends to the content of the furnace body (11) across the electrode hole, to
To the furnace body (11) heat supply.
4. nickel slag dilution device according to claim 3, which is characterized in that the line feeding hole be it is multiple, it is multiple described to feed
String holes is distributed in the top of the furnace body (11).
5. nickel slag dilution device according to claim 4, which is characterized in that the line feeding hole is 3~8, the line feeding
The aperture in hole is 30~100mm.
6. nickel slag dilution device according to claim 3, which is characterized in that the furnace body (11) puts sulfonium relative to described
Mouthful a side lower part be additionally provided with slag tap, the slag tap is being discharged the stove of output in the reduction dilution processing procedure
Slag.
7. nickel slag dilution device according to claim 6, which is characterized in that the nickel slag dilution device further includes slag cooling
Device, the slag cooler cool down to the clinker that the slag tap is discharged.
8. the nickel slag dilution device according to any one of claim 3 to 7, which is characterized in that the top of the furnace body (11)
Portion is additionally provided with additive entrance, and the additive entrance is being passed through additive.
9. nickel slag dilution device according to claim 8, which is characterized in that the additive entrance and the nickel slag import
It is co-located.
10. nickel slag dilution device according to claim 8, which is characterized in that the nickel slag dilution device further includes addition
Agent feed bin (50), the additive storage bin (50) are connected with the additive entrance.
11. nickel slag dilution device according to any one of claim 1 to 7, which is characterized in that the nickel slag dilution processing
Stove (10) is additionally provided with offgas outlet, and the nickel slag dilution device further includes：
Waste-heat recovery device (30), is provided with heat smoke import and cold flue gas outlet, and the heat smoke import goes out with the tail gas
Mouth is connected；And
Dust arrester installation (40), the dust arrester installation (40) are connected with cold flue gas outlet.
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|---|---|---|---|
| CN201810638120.2A CN108441650A (en) | 2018-06-20 | 2018-06-20 | Nickel slag dilution device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810638120.2A CN108441650A (en) | 2018-06-20 | 2018-06-20 | Nickel slag dilution device |
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ID=63206530
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110241307A (en) * | 2019-07-08 | 2019-09-17 | 中国恩菲工程技术有限公司 | The method that two-stage method reduction nickel-containing material prepares nickel matte |
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| CN110241307B (en) * | 2019-07-08 | 2021-04-09 | 中国恩菲工程技术有限公司 | Method for preparing nickel matte by reducing nickel-containing material by two-stage method |
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