CN105396673A - Method for producing grinding nickel-iron slag and steel slag composite powder through grinding by using vertical mill - Google Patents
Method for producing grinding nickel-iron slag and steel slag composite powder through grinding by using vertical mill Download PDFInfo
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- CN105396673A CN105396673A CN201510596381.9A CN201510596381A CN105396673A CN 105396673 A CN105396673 A CN 105396673A CN 201510596381 A CN201510596381 A CN 201510596381A CN 105396673 A CN105396673 A CN 105396673A
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- steel slag
- steel
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- 239000002893 slag Substances 0.000 title claims abstract description 257
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 86
- 239000010959 steel Substances 0.000 title claims abstract description 86
- 239000000843 powder Substances 0.000 title claims abstract description 60
- 238000000227 grinding Methods 0.000 title claims abstract description 58
- 239000002131 composite material Substances 0.000 title claims abstract description 46
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 title abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 76
- 229910000863 Ferronickel Inorganic materials 0.000 claims description 70
- 229910052742 iron Inorganic materials 0.000 claims description 38
- 238000007885 magnetic separation Methods 0.000 claims description 32
- 239000006148 magnetic separator Substances 0.000 claims description 21
- 238000005516 engineering process Methods 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 13
- 229910052751 metal Inorganic materials 0.000 claims description 13
- 239000007921 spray Substances 0.000 claims description 13
- 238000012216 screening Methods 0.000 claims description 12
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 238000003860 storage Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000004744 fabric Substances 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 8
- 238000004064 recycling Methods 0.000 claims description 7
- 238000013467 fragmentation Methods 0.000 claims description 6
- 238000006062 fragmentation reaction Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 239000013528 metallic particle Substances 0.000 claims description 3
- 238000003801 milling Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 2
- 239000012744 reinforcing agent Substances 0.000 claims description 2
- 230000002708 enhancing effect Effects 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 239000012752 auxiliary agent Substances 0.000 abstract 1
- 239000003623 enhancer Substances 0.000 abstract 1
- 238000005507 spraying Methods 0.000 abstract 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 18
- 229910052759 nickel Inorganic materials 0.000 description 9
- 238000003723 Smelting Methods 0.000 description 8
- 239000011504 laterite Substances 0.000 description 2
- 229910001710 laterite Inorganic materials 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
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- Manufacture And Refinement Of Metals (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention relates to a method for producing grinding nickel-iron slag and steel slag composite powder through grinding by using a vertical mill. The method is characterized by comprising: (b) preparing mixing slag: mixing nickel-iron slag and steel slag tailings according to a weight ratio of 2-4:8-6 respectively through a quantitative feeder, spraying an auxiliary grinding enhancer having the amount of 0.1-0.15 wt% of the total amount of the nickel-iron slag and steel slag tailings, adding the obtained mixture into a screw conveyor, conveying into a vertical mill through the screw conveyor, and directly grinding. According to the present invention, the nickel-iron slag and the steel slag are pre-treated, a certain amount of the enhancing auxiliary agent is added according to a certain ratio, the obtained mixture enters the domestic vertical mill, and the direct grinding is performed by matching with the appropriate equipment and the process parameters so as to produce the nickel-iron slag and steel slag composite powder, such that the traditional nickel-iron slag and steel slag composite powder production steps are simplified, the uniformity of the nickel-iron slag and steel slag composite powder is improved, and the production energy consumption and the cost are reduced.
Description
Technical field
The present invention relates to a kind of vertical mill grinding ferronickel slag, steel slag composite powder production method.
Background technology
Ferronickel slag also claims nickel slag, nickel-iron smelting slag etc., and the solid slag produced when being smelting ferronickel alloy, can be divided into dry slag and grain slag by its form, can be divided into nickelic slag and low nickel slag by its nickel content height.
In recent years, along with laterite steel pyrometallurgical smelting dilval scale progressively expands, the discharge capacity of laterite nickel steel smelting ferronickel waste residue (being called for short ferronickel slag) increases gradually.Compared with other metallurgical slag, ferronickel slag valuable metal recovery is worth low, and bed drain purge is large, progressively becomes a great problem of metallurgical slag process.Banking up and landfill of a large amount of electrosmelting ferronickel slag, not only land occupation, contaminated environment, the sustainable development of returning nickel-iron smelting brings severe challenge.So nickel-iron smelting industry " outlet " problem be badly in need of as solving nickel-iron smelting slag carries out the comprehensive utilizating research of scientific system.
All containing a certain amount of dilval particle in the waste residue of nickel-iron smelting, dilval price is higher, and therefore, the dilval reclaimed in nickel slag becomes a strong event that investment is little, income is fast.The ratio of dilval is great, and the proportion of ferronickel slag is little, utilizes the method for gravity treatment effectively can reclaim dilval particle wherein.And reclaimed hardly containing any recycling metal in the ferronickel slag after metal, the solid slag that therefore this part of nickel scum can be real at last, it can be used as raw material or the additive of building material.
Through retrieval, the now existing application adopting ferronickel ground-slag to be used as cement mixture and concrete admixture, but do not find the technique adopting vertical mill to grind ferronickel slag and steel slag composite powder, therefore, research and develop a kind of can make full use of resource and reduce the vertical mill grinding ferronickel slag of energy resource consumption, steel slag composite powder production method imperative.
Summary of the invention
The technical problem to be solved in the present invention is to provide and a kind ofly can utilizes resource and reduce vertical mill grinding ferronickel slag, the steel slag composite powder production method of energy resource consumption.
For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of vertical mill grinding ferronickel slag, steel slag composite powder production method, and its innovative point is:
pretreatment:ferronickel slag and slag are entered the secondary batch bin of ferronickel slag and the main batch bin of slag respectively through the steel slag tailings that processing metal recycling step obtains;
preparation mixing slag:mixed by respective constant feeder by the part by weight of ferronickel slag with steel slag tailings component 2 ~ 4:8 ~ 6, after the grinding aid reinforcing agent of spray ferronickel slag, steel slag tailings total amount 0.1%wt-0.15%wt, enter conveying worm again, then send into the direct grinding of vertical mill by conveying worm;
vertical Mill: control the grinding roller pressure of vertical mill at 12-13MPa, the lining board for grinding discs inclined angle of vertical mill is 3 °, and mill and the grinding roller nip angle when milling is 5 ~ 6 °, and hot blast enters vertical mill temperature 260--310 DEG C, and air quantity is at 20*10
4-21*10
4m
3/ h, hot blast goes out vertical mill temperature 85-92 DEG C, and the powder concentrator rotating speed of vertical mill, at 115-135r/min, obtains qualified ferronickel slag, steel slag composite powder and underproof ferronickel slag, steel slag composite powder mill feed back; And in Vertical Mill process, Real-Time Monitoring vertical mill mill vertical direction and horizontal direction amplitude, if vertical direction amplitude > is 2.5mm, during horizontal direction amplitude > 2mm, then carry out inside water spray to vertical mill, injection flow rate is at 1.6-2.3m
3/ h, until vertical direction amplitude < 2.5mm, horizontal direction amplitude < 2mm; In Vertical Mill process, the hot blast temperature simultaneously entered in Real-Time Monitoring vertical mill, at ferronickel slag and steel slag tailings component ratio 1/4 ~ 1/2 time, if the hot blast temperature > entered 310 DEG C, then will carry out inside water spray to vertical mill, injection flow rate is at 1.6-2.3m
3/ h, until temperature < 310 DEG C; At ferronickel slag and steel slag tailings component ratio 1/2 ~ 2/3 time, if the hot blast temperature > entered 305 DEG C, then will carry out inside water spray to vertical mill, injection flow rate is at 1.6-2.3m
3/ h, until temperature < 305 DEG C.
Preferably, described in
slag processing metal recycling step comprisesslag crushing, deironing pretreatment close circulation technology, and the pre-grinding of slag, iron removal by magnetic separation close circulation technology; In slag crushing, deironing pretreatment close circulation technology, slag is first through the screening of hydraulic overturn sieve, and the slag being less than hydraulic overturn sieve mesh size enters to award feed bin, stablizes and is transported on conveyer, send to after constant feeder weighs
hydraulic jaw crusherfragmentation, can send into storage bin after fragmentation; Be greater than the slag quartering hammer coarse crushing of hydraulic overturn sieve mesh size, after magnechuck deironing, again enter the screening of hydraulic overturn sieve, iterative cycles like this, guarantee to enter the slag size controlling of awarding feed bin in the pore diameter range being less than hydraulic overturn sieve screen cloth; In the pre-grinding of slag, iron removal by magnetic separation close circulation technology, through slag crushing, the pretreated slag of deironing in storage bin, stablizing after constant feeder weighs is transported on conveyer, carry out pre-grinding by domestic rod mill and reduce slag particle diameter, and the metallic particles be attached on slag and the sticky slag blanket part wrapped on metal are peeled off; Carry out deironing by self-unloading type deferrization device after pre-grinding, then enter broadband magnetic separator by wide distributing device and carry out iron removal by magnetic separation; Steel slag tailings after the magnetic separator iron removal by magnetic separation of broadband is by No. two vibratory sieve screenings, and the steel slag tailings being greater than No. two Vibration Screen screen distances gets back to storage bin again to enter domestic rod mill carrying out pre-grinding; The steel slag tailings being less than No. two Vibration Screen screen distances send into the adjustable magnetic separator of single roller again after iron removal by magnetic separation the steel slag tailings sent in bank factory building store up district.
Preferably, a vibratory sieve screening is crossed by the slag Tie Tong that the magnetic separator deironing of described broadband obtains, and the slag iron being greater than a Vibration Screen screen distance enters slag iron storehouse; The slag Tie Tong being less than a Vibration Screen screen distance crosses oscillating feeder and enters two roll machine magnetic separation again, separates magnetic separation and steel slag tailings, and the steel slag tailings that steel slag tailings sends into bank factory building stores up district.
Preferably, described vertical mill produces underproof ferronickel slag, steel slag composite powder mill feed back carry out
iron removal by magnetic separation closed cycle step: ferronickel slag, steel slag composite powder mill feed back is successively through No. three self-discharging type electric-magnetic iron removers, a dry powder permanent-magnet drum type magnetic separator iron removal by magnetic separation, vertical mill top is delivered to again by an elevator, through vibrating feed machine vibration cloth, the thickness of feed layer of cloth is less than 20mm, bed of material width is identical with No. two dry powder permanent-magnet drum type magnetic separator magnetic rollers, enter No. two dry powder permanent-magnet drum type magnetic separators again after iron removal by magnetic separation, the another one charging aperture sending into conveying worm entrance top vertical mill enters vertical mill grinding again.
The invention has the advantages that: the present invention is by carrying out pretreatment to ferronickel slag and slag, proportionally add a certain amount of enhancing grinding aid after proportioning and enter domestic vertical mill, and coordinate the direct grinding of corresponding equipment and process parameter to produce ferronickel slag, steel slag composite powder, simplify the production stage of traditional nickel scum, steel slag composite powder, improve ferronickel slag, the steel slag composite powder uniformity, reduce energy consumption and cost.Production method of the present invention is conducive to adopting same vertical mill separate compiling ferronickel ground-slag, steel-making slag powder and ferronickel slag steel slag composite powder to realize resource reclaim recycling, and then public most equipment, substantially increase the utilization rate of equipment and resource, reduce Engineering Project and cost of goods manufactured.
Production method of the present invention, ferronickel slag, the steel slag composite powder output of production reach 45-50t/h, and ferronickel slag, steel slag composite powder specific area reach 450m
2/ kg, meets national standard completely.Unit product power consumption: ferronickel slag, steel slag composite powder reach about 30-32kwh/t.About the comprehensive power consumption of ferronickel slag, steel slag composite powder reaches 42-45kwh/ ton.
Accompanying drawing explanation
Fig. 1 is slag processing metal recycling flow chart in the present invention.
Detailed description of the invention
First need to carry out pretreatment to slag in vertical mill grinding ferronickel slag of the present invention, steel slag composite powder production method:
slag processing metal recycles: as shown in Figure 1,comprise slag crushing, deironing pretreatment close circulation technology, and the pre-grinding of slag, iron removal by magnetic separation close circulation technology;
Slag crushing, except in metal pretreatment close circulation technology, slag is first through the screening of hydraulic overturn sieve, the screen-aperture of hydraulic overturn sieve is 200mm, the slag of the particle diameter≤200mm filtered out enters to award feed bin, weigh through constant feeder, stablize and be transported on No. 1 belt conveyor, send hydraulic jaw crusher fragmentation again to by No. 2 belt conveyors, controlling discharging particle diameter is≤40mm, and the slag after fragmentation sends into storage bin by No. 3 belt conveyors; The slag of the > 200mm filtered out adopts quartering hammer coarse crushing, screening is continued with entering hydraulic overturn sieve after magnechuck deironing again, the slag of≤200mm enters awards feed bin, iterative cycles like this, guarantees the slag size controlling that enters hydraulic jaw crusher in the particle size range of≤200mm.
In the pre-grinding of slag, iron removal by magnetic separation close circulation technology, through slag crushing, the pretreated slag of deironing in storage bin, stablizing after constant feeder weighs is transported on No. 4 belt conveyors, carry out pre-grinding by domestic rod mill and reduce slag particle diameter, and the metallic particles be attached on slag and the sticky slag blanket part wrapped on metal are peeled off; Carry out deironing by self-unloading type deferrization device after pre-grinding, then enter broadband magnetic separator by wide distributing device and carry out iron removal by magnetic separation;
Steel slag tailings after the magnetic separator iron removal by magnetic separation of broadband is delivered to by No. 8 belt conveyors
no. two vibratory sievesscreening, this vibratory sieve is comb vibratory sieve, and the steel slag tailings of > 3mm gets back to storage bin again to enter domestic rod mill carrying out pre-grinding by No. 9 belt conveyors, No. 3 belt conveyors; The steel slag tailings of≤3mm enters by No. 11 belt conveyors the magnetic separation that the adjustable magnetic separator of single roller selects after iron removal by magnetic separation again and enters magnetic separation storehouse, steel slag tailings is transported to No. 13 by No. 12 belt conveyors and rotates on defeated heap belt conveyor, and sends into slag bank factory building by it.
A vibratory sieve screening is crossed by the slag Tie Tong that broadband magnetic separator iron removal by magnetic separation obtains, and this vibratory sieve is comb vibratory sieve, and the slag iron of > 3mm enters slag iron storehouse; The slag Tie Tong of≤3mm crosses No. 10 belt conveyors and is transported to oscillating feeder and enters two roll machine magnetic separation again, separate magnetic separation and steel slag tailings, magnetic separation enters magnetic separation storehouse, steel slag tailings is transported to No. 13 by No. 12 belt conveyors and rotates on defeated heap belt conveyor, and sends into slag bank factory building by it.
Steel slag tailings is driven a vehicle after slag feed bin is grabbed in grab bucket by 20T and is transferred on the second belt conveyor through the first belt conveyor, then enters the main batch bin of slag.
Ferronickel slag is driven a vehicle after slag feed bin is grabbed in grab bucket by 20T and is directly delivered into the secondary batch bin of ferronickel slag through No. 19 belt conveyors.
Preparation mixing slag, secondary for ferronickel slag batch bin is delivered on the second belt conveyor by No. two constant feeders, steel slag tailings is sent on the second belt conveyor by a constant feeder from the main batch bin of slag, and the part by weight that conveying capacity presses ferronickel slag and steel slag tailings component 2 ~ 4:8 ~ 6 is prepared.
Ferronickel slag, slag, through No. two self-discharging type electric-magnetic iron remover deironing again, then spray the enhancing grinding aid of slag, nickel slag total amount 0.1%wt-0.15%wt,
this enhancing grinding aid adopts the enhancing grinding aid of Shanghai Ai Si get Rui building materials Co., Ltd, its name of product model: smartv8-A.
after spray grinding aidsend into vertical mill by conveying worm and carry out grinding, obtain qualified ferronickel slag, steel slag composite powder and underproof ferronickel slag, steel slag composite powder mill feed back.
Qualified ferronickel slag, steel slag composite powder are collected by sack cleaner, deliver to No. two bucket elevators by an air conveyer flume, deliver to powder bank top by No. two bucket elevators, push up No. two air flumes be delivered to ferronickel slag, steel slag composite powder storehouse through storehouse; Ferronickel slag, steel slag composite powder storehouse enter by open-type inflatable box that bottom of the reservior automobile bulk system is in bulk to dispatch from the factory.
Underproof ferronickel slag, steel slag composite powder mill feed back is sent into No. three self-unloading electric magnetic iron removers by No. 18 belt conveyors and is carried out a deironing, slag iron enters slag iron storehouse, feed back after a deironing is sent into a dry powder permanent-magnet drum type magnetic separator and is carried out secondary deironing, slag iron storehouse sent into by the slag iron be separated, a bucket elevator sent into by secondary deironing feed back, deliver to vertical mill top, by aerodynamic side threeway scraper-trough conveyer, feed back is sent into oscillating feeder again, through vibrating feed machine vibration cloth, the thickness of feed layer of cloth is less than 20mm, bed of material width is identical with No. two dry powder permanent-magnet drum type magnetic separator magnetic rollers, after three deironing of No. two dry powder permanent-magnet drum type magnetic separators, be fed in vertical mill above the defeated machine of helical feed
another one charging aperture enter vertical mill grinding again,grinding becomes qualified ferronickel slag, steel slag composite powder, and slag iron storehouse sent into by the slag iron of separation.
In vertical mill grinding ferronickel slag, steel slag composite powder process, control the grinding roller pressure of vertical mill at 12-13MPa, hot blast enters vertical mill temperature 260-310 DEG C, and air quantity is at 20*10
4-21*10
4m
3/ h, hot blast goes out vertical mill temperature 85-92 DEG C, and the powder concentrator rotating speed of vertical mill is at 115-135r/min.
Meanwhile, in Vertical Mill process, Real-Time Monitoring vertical mill mill vertical direction and horizontal direction amplitude, if vertical direction amplitude > is 2.5mm, during horizontal direction amplitude > 2mm, then carry out inside water spray to vertical mill, injection flow rate is at 1.6-2.3m
3/ h, until vertical direction amplitude < 2.5mm, horizontal direction amplitude < 2mm; In Vertical Mill process, the hot blast temperature simultaneously entered in Real-Time Monitoring vertical mill, at ferronickel slag and steel slag tailings component ratio 1/4 ~ 1/2 time, if the hot blast temperature > entered 310 DEG C, then will carry out inside water spray to vertical mill, injection flow rate is at 1.6-2.3m
3/ h, until temperature < 310 DEG C; At ferronickel slag and steel slag tailings component ratio 1/2 ~ 2/3 time, if the hot blast temperature > entered 305 DEG C, then will carry out inside water spray to vertical mill, injection flow rate is at 1.6-2.3m
3/ h, until temperature < 305 DEG C.
Meanwhile, vertical mill internal structure is adjusted: the lining board for grinding discs angle of vertical mill is 3 °, and the angle of roller shell axis and horizontal plane is 15 °, and mill and the grinding roller nip angle when milling is 5 ~ 6 °.In the present embodiment, vertical mill grinding
ferronickel slag, steel slag composite powderin step, the parameters controlling vertical mill is as follows:
Based on slag, the nickel ground-slag production method of the present embodiment, product yield and comprehensive power consumption technical indicator as shown in table 1 below:
Based on ferronickel slag, the steel slag composite powder production method of the present embodiment, shown in its technical indicator table specific as follows:
Table 2
in the present embodiment, ferronickel slag, the steel slag composite powder output of production reach
45-50t/h,ferronickel slag, steel slag composite powder specific area 450-480m
2/ kg, meets national standard completely.Unit product power consumption: ferronickel slag, steel slag composite powder reach 30-32
kwh/tleft and right.About the comprehensive power consumption of ferronickel slag, steel slag composite powder reaches 42-45kwh/ ton.
Claims (4)
1. vertical mill grinding ferronickel slag, a steel slag composite powder production method, is characterized in that:
pretreatment:ferronickel slag and slag are entered the secondary batch bin of ferronickel slag and the main batch bin of slag respectively through the steel slag tailings that processing metal recycling step obtains;
preparation mixing slag:mixed by respective constant feeder by the part by weight of ferronickel slag with steel slag tailings component 2 ~ 4:8 ~ 6, after the grinding aid reinforcing agent of spray ferronickel slag, steel slag tailings total amount 0.1%wt-0.15%wt, enter conveying worm again, then send into the direct grinding of vertical mill by conveying worm;
vertical Mill: control the grinding roller pressure of vertical mill at 12-13MPa, the lining board for grinding discs inclined angle of vertical mill is 3 °, and mill and the grinding roller nip angle when milling is 5 ~ 6 °, and hot blast enters vertical mill temperature 260--310 DEG C, and air quantity is at 20*10
4-21*10
4m
3/ h, hot blast goes out vertical mill temperature 85-92 DEG C, and the powder concentrator rotating speed of vertical mill, at 115-135r/min, obtains qualified ferronickel slag, steel slag composite powder and underproof ferronickel slag, steel slag composite powder mill feed back;
And in Vertical Mill process, Real-Time Monitoring vertical mill mill vertical direction and horizontal direction amplitude, if vertical direction amplitude > is 2.5mm, during horizontal direction amplitude > 2mm, then carry out inside water spray to vertical mill, injection flow rate is at 1.6-2.3m
3/ h, until vertical direction amplitude < 2.5mm, horizontal direction amplitude < 2mm; In Vertical Mill process, the hot blast temperature simultaneously entered in Real-Time Monitoring vertical mill, at ferronickel slag and steel slag tailings component ratio 1/4 ~ 1/2 time, if the hot blast temperature > entered 310 DEG C, then will carry out inside water spray to vertical mill, injection flow rate is at 1.6-2.3m
3/ h, until temperature < 310 DEG C; At ferronickel slag and steel slag tailings component ratio 1/2 ~ 2/3 time, if the hot blast temperature > entered 305 DEG C, then will carry out inside water spray to vertical mill, injection flow rate is at 1.6-2.3m
3/ h, until temperature < 305 DEG C.
2. vertical mill grinding ferronickel slag according to claim 1, steel slag composite powder production method, is characterized in that:
Described
slag processing metal recycling step comprisesslag crushing, deironing pretreatment close circulation technology, and the pre-grinding of slag, iron removal by magnetic separation close circulation technology;
In slag crushing, deironing pretreatment close circulation technology, slag is first through the screening of hydraulic overturn sieve, and the slag being less than hydraulic overturn sieve mesh size enters to award feed bin, stablizes and is transported on conveyer, send to after constant feeder weighs
hydraulic jaw crusherfragmentation, can send into storage bin after fragmentation; Be greater than the slag quartering hammer coarse crushing of hydraulic overturn sieve mesh size, after magnechuck deironing, again enter the screening of hydraulic overturn sieve, iterative cycles like this, guarantee to enter the slag size controlling of awarding feed bin in the pore diameter range being less than hydraulic overturn sieve screen cloth;
In the pre-grinding of slag, iron removal by magnetic separation close circulation technology, through slag crushing, the pretreated slag of deironing in storage bin, stablizing after constant feeder weighs is transported on conveyer, carry out pre-grinding by domestic rod mill and reduce slag particle diameter, and the metallic particles be attached on slag and the sticky slag blanket part wrapped on metal are peeled off; Carry out deironing by self-unloading type deferrization device after pre-grinding, then enter broadband magnetic separator by wide distributing device and carry out iron removal by magnetic separation; Steel slag tailings after the magnetic separator iron removal by magnetic separation of broadband is by No. two vibratory sieve screenings, and the steel slag tailings being greater than No. two Vibration Screen screen distances gets back to storage bin again to enter domestic rod mill carrying out pre-grinding; The steel slag tailings being less than No. two Vibration Screen screen distances send into the adjustable magnetic separator of single roller again after iron removal by magnetic separation the steel slag tailings sent in bank factory building store up district.
3. vertical mill grinding ferronickel slag according to claim 3, steel slag composite powder production method, is characterized in that:
A vibratory sieve screening is crossed by the slag Tie Tong that the magnetic separator deironing of described broadband obtains, and the slag iron being greater than a Vibration Screen screen distance enters slag iron storehouse; The slag Tie Tong being less than a Vibration Screen screen distance crosses oscillating feeder and enters two roll machine magnetic separation again, separates magnetic separation and steel slag tailings, and the steel slag tailings that steel slag tailings sends into bank factory building stores up district.
4. vertical mill grinding ferronickel slag according to claim 1, steel slag composite powder production method, is characterized in that:
The underproof ferronickel slag that described vertical mill produces, steel slag composite powder mill feed back carries out
iron removal by magnetic separation closed cycle step:
Ferronickel slag, steel slag composite powder mill feed back is successively through No. three self-discharging type electric-magnetic iron removers, a dry powder permanent-magnet drum type magnetic separator iron removal by magnetic separation, vertical mill top is delivered to again by an elevator, through vibrating feed machine vibration cloth, the thickness of feed layer of cloth is less than 20mm, bed of material width is identical with No. two dry powder permanent-magnet drum type magnetic separator magnetic rollers, enter No. two dry powder permanent-magnet drum type magnetic separators again after iron removal by magnetic separation, the another one charging aperture sending into conveying worm entrance top vertical mill enters vertical mill grinding again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510596381.9A CN105396673A (en) | 2015-09-18 | 2015-09-18 | Method for producing grinding nickel-iron slag and steel slag composite powder through grinding by using vertical mill |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510596381.9A CN105396673A (en) | 2015-09-18 | 2015-09-18 | Method for producing grinding nickel-iron slag and steel slag composite powder through grinding by using vertical mill |
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|---|---|
| CN105396673A true CN105396673A (en) | 2016-03-16 |
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| CN201510596381.9A Pending CN105396673A (en) | 2015-09-18 | 2015-09-18 | Method for producing grinding nickel-iron slag and steel slag composite powder through grinding by using vertical mill |
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| CN106116196A (en) * | 2016-07-01 | 2016-11-16 | 江苏融达新材料股份有限公司 | A kind of vertical mill grinding slag, lithium slag composite powder production method |
| CN106116195A (en) * | 2016-07-01 | 2016-11-16 | 江苏融达新材料股份有限公司 | A kind of vertical mill grinding slag, lithium slag add modifying agent composite powder production method |
| CN106423538A (en) * | 2016-12-08 | 2017-02-22 | 泰安中意重型工业设备有限公司 | Copper mineral and nonferrous metal mineral separating method and device |
| CN106938216A (en) * | 2016-12-31 | 2017-07-11 | 杭州永强金属制品有限公司 | A kind of metal waste residue seperator |
| CN108164170A (en) * | 2017-12-29 | 2018-06-15 | 阳江市大地环保建材有限公司 | A kind of mixed Ni scum micro mist and preparation method thereof |
| CN110142123A (en) * | 2019-05-15 | 2019-08-20 | 江苏省镔鑫钢铁集团有限公司 | A kind of steel slag processing system and processing method |
| CN111533469A (en) * | 2020-05-19 | 2020-08-14 | 江苏启坤循环经济产业技术开发有限公司 | Method for preparing novel steel slag powder by using industrial waste nickel slag |
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