CN109675905A - Steel slag recycling treatment system and treatment method - Google Patents
Steel slag recycling treatment system and treatment method Download PDFInfo
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- CN109675905A CN109675905A CN201811434577.8A CN201811434577A CN109675905A CN 109675905 A CN109675905 A CN 109675905A CN 201811434577 A CN201811434577 A CN 201811434577A CN 109675905 A CN109675905 A CN 109675905A
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- steel slag
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- tailing
- steel
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 104
- 239000010959 steel Substances 0.000 title claims abstract description 104
- 239000002893 slag Substances 0.000 title claims abstract description 93
- 238000000034 method Methods 0.000 title claims description 18
- 238000004064 recycling Methods 0.000 title abstract description 6
- 238000007885 magnetic separation Methods 0.000 claims abstract description 49
- 238000012545 processing Methods 0.000 claims abstract description 34
- 238000001354 calcination Methods 0.000 claims abstract description 26
- 239000000945 filler Substances 0.000 claims abstract description 21
- 238000012216 screening Methods 0.000 claims abstract description 18
- 239000010881 fly ash Substances 0.000 claims abstract description 14
- 238000001816 cooling Methods 0.000 claims abstract description 10
- 238000002360 preparation method Methods 0.000 claims abstract description 10
- 239000006148 magnetic separator Substances 0.000 claims description 41
- 238000000227 grinding Methods 0.000 claims description 40
- 239000012141 concentrate Substances 0.000 claims description 31
- 230000006698 induction Effects 0.000 claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 15
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 11
- 229960000935 dehydrated alcohol Drugs 0.000 claims description 11
- 230000005307 ferromagnetism Effects 0.000 claims description 10
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 10
- 241000876852 Scorias Species 0.000 claims description 9
- 238000010792 warming Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000010883 coal ash Substances 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 239000002270 dispersing agent Substances 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 claims description 2
- -1 silicane alkane Chemical class 0.000 claims description 2
- 239000005977 Ethylene Substances 0.000 claims 1
- 238000003911 water pollution Methods 0.000 abstract description 3
- 238000003672 processing method Methods 0.000 abstract description 2
- 238000003900 soil pollution Methods 0.000 abstract description 2
- 239000011651 chromium Substances 0.000 description 25
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 18
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 18
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 10
- 230000000694 effects Effects 0.000 description 10
- 229910052742 iron Inorganic materials 0.000 description 9
- 239000000395 magnesium oxide Substances 0.000 description 9
- 229910052596 spinel Inorganic materials 0.000 description 7
- 239000011029 spinel Substances 0.000 description 7
- 229910052804 chromium Inorganic materials 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 description 4
- 239000011707 mineral Substances 0.000 description 4
- 229910000990 Ni alloy Inorganic materials 0.000 description 3
- NACUKFIFISCLOQ-UHFFFAOYSA-N [Mg].[Cr] Chemical compound [Mg].[Cr] NACUKFIFISCLOQ-UHFFFAOYSA-N 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 229920000388 Polyphosphate Polymers 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000010494 dissociation reaction Methods 0.000 description 2
- 230000005593 dissociations Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical group CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 239000001205 polyphosphate Substances 0.000 description 2
- 235000011176 polyphosphates Nutrition 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 229910001341 Crude steel Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 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
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- IDGUHHHQCWSQLU-UHFFFAOYSA-N ethanol;hydrate Chemical compound O.CCO IDGUHHHQCWSQLU-UHFFFAOYSA-N 0.000 description 1
- 239000010436 fluorite Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- ARYZCSRUUPFYMY-UHFFFAOYSA-N methoxysilane Chemical compound CO[SiH3] ARYZCSRUUPFYMY-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
本发明涉及一种钢渣资源化处理系统及处理方法，该包括钢渣分选系统和填料制备系统，钢渣通过转子破碎机、振动给料机、磁选机、传送带、预热器、研磨机、煅烧炉、冷却仓、振动筛分机、冲击式破碎机进行磁选、破碎、预热、煅烧和筛选后分离出钢渣中的无害尾矿，最后通过与粉煤灰保持一定的质量比即可制备性能良好的填料，不仅能够减少钢渣填埋所带来的土壤污染和水体污染，还能够用于制备填料，实现了钢渣的资源化处理，具备良好应用前景。
The invention relates to a steel slag recycling processing system and a processing method, comprising a steel slag sorting system and a filler preparation system. After magnetic separation, crushing, preheating, calcination and screening of furnace, cooling bin, vibrating screener and impact crusher, the harmless tailings in steel slag are separated, and finally, it can be prepared by maintaining a certain mass ratio with fly ash. Fillers with good performance can not only reduce soil pollution and water pollution caused by steel slag landfill, but also can be used to prepare fillers, realize the resource treatment of steel slag, and have good application prospects.
Description
Technical field
The present invention relates to a kind of processing system of waste, in particular to a kind of Comprehensive Utilization of Steel Slag processing system and processing side
Method.
Background technique
Steel slag is for the substance for removing impurity in steel and by-product in steelmaking process, it includes desulfurization, dephosphorization, deoxidation products
And the therefore slag former that is added, such as lime, fluorite, deoxidier, the silt particle brought into metal charge, in molten iron and steel scrap
The oxide formed after the oxidation such as aluminium, silicon, manganese, the iron ore used as coolant or oxidant, iron scale, iron containing sludge
Deng；The furnace lining material etc. to get off is corroded in steelmaking process；Its main chemical compositions includes CaO, SiO2, Al2O3、MgO、Fe2O3、
MnO、TiO2、P2O5And FeO etc..
The generation rate of steel slag be crude steel yield 8%-15%, Chinese steel slag yield with steel and iron industry fast development
And it is incremented by rapidly；Therefore, the processing of iron and steel enterprise's waste residue and resource utilization problem are also increasingly taken seriously, national development
It is pointed out in planning, the comprehensive utilization ratio of steel slag should be basic to realize " zero-emission " up to 86% or more；However, China's comprehensive utilization at present
Status differ greatly with the planning, the utilization rate for being especially known as the converter slag of the title of " clinker inferior " is only 10% ~
20%, the steel slag that domestic iron and steel enterprises generate cannot be handled in time, cause a lot of steel slag land occupation, pollute environment；However steel slag
Not not available solid waste, wherein component can be utilized containing a large amount of slag steel, calcium oxide, iron and magnesia etc., and
And scorching hot steel slag has thermal energy abundant, and containing 10% or so steel scrap, and a large amount of beneficial chemical element, it is sufficiently sharp
With the useful component in slag, to improve the recycling benefit of steel slag；Steel slag is mainly used for ground backfill, urban road laying, water by China
Mud raw material and water purification agent etc.；So selecting suitable treatment process and utilization to make iron and steel enterprise create economy and environmental benefit
For approach to recycle the metal charge in steel slag as much as possible, it is very necessary and urgent for improving the comprehensive utilization ratio of tailings.
Summary of the invention
A kind of Comprehensive Utilization of Steel Slag processing system proposed the purpose of the present invention is to solve background technique, steel slag pass through
Impeller breaker, oscillating feeder, magnetic separator, conveyer belt, preheater, grinder, calcining furnace, cooling storehouse, vibrating screening machine, punching
Impact crusher carries out isolating the harmless tailing in steel slag after magnetic separation, broken, preheating, calcining and screening, finally by with powder
Coal ash keep certain mass ratio can the good filler of processability, can not only reduce steel slag fill brought by soil it is dirty
Dye and water pollution, additionally it is possible to be used to prepare filler, realize the recycling treatment of steel slag.
Comprehensive Utilization of Steel Slag processing system of the invention includes steel slag separation system and filler preparation system；The steel slag sorting
System includes impeller breaker, oscillating feeder, magnetic separator, conveyer belt, preheater, grinder, calcining furnace, cooling storehouse, vibration
Screening machine and impact crusher；It is the impeller breaker, oscillating feeder, magnetic separator, preheater, grinder, calcining furnace, cold
But storehouse, vibrating screening machine and impact crusher are sequentially connected by conveyer belt, the preheater be used for just broken steel slag into
Row heating, the outlet end of the impact crusher pass through the temporary storing bin of conveyer belt bonding pad preparation system；
The filler preparation system includes conveyer belt, temporary storing bin, metering pound, blender, fine coal ash cellar and silane coupling agent tank, institute
It states temporary storing bin and blender is sequentially connected by conveyer belt, metering pound connects blender after weighing respectively to steel slag and flyash,
Silane coupling agent tank is connect by metering pump with blender, after the steel slag after sorting is stirred with flyash, silane coupling agent
It is prepared into filler.
Limited as of the invention further, the method that magnetic separator carries out magnetic separation are as follows: oscillating feeder will it is just broken after
Steel slag is sent into wet type grinding bed, then carries out magnetic separation by weak magnetic magnetic separator, sub-elects ferromagnetism concentrate and weak magnetic tailing；Again
Weak magnetic tailing is subjected to magnetic separation by segmented intensity magnetic separator, sub-elects concentrate and tailings, wherein tailing is sent by conveyer belt
Enter preheater and carries out subsequent processing.
Water and nothing is added when carrying out the processing of wet type grinding using wet type grinding bed as further restriction of the invention
Water-ethanol controls steel slag, water, dehydrated alcohol, three as retarder, grinding time 30min as dispersing agent, sodium tripolyphosphate
The mass ratio of polyphosphate sodium are as follows: 3:9:3:1, the steel slag partial size after grinding are less than 50um.
As further restriction of the invention, the magnetic induction intensity of the weak magnetic magnetic separator is 180mT；The segmented
The magnetic induction intensity of intensity magnetic separator is 1200mT.
As further restriction of the invention, the preheater is tubular heat exchanger, and heating temperature is 650 DEG C；Institute
Stating calcining furnace control calcination temperature is 1000~1100 DEG C, calcination time 2h, and 1300 DEG C are then warming up in 0.5h and is protected
Warm 2h.
It is further limited as of the invention, the mass ratio of each material in the blender are as follows: steel slag: flyash: silicon
Alkane coupling agent=20~30:15~30:10~22；Wherein, silane coupling agent is vinyltriethoxysilane or vinyl three
Methoxy silane.
The invention further particularly discloses the sides that a kind of Comprehensive Utilization of Steel Slag processing system carries out building castoff recycling treatment
Method, this method comprises the following steps:
(1) it by steel slag discharging to hopper, is then delivered in impeller breaker by conveyer belt and is tentatively crushed, after just broken
Steel slag grinding is carried out into wet type grinding bed by oscillating feeder, and be added into wet type grinding bed water, dehydrated alcohol and
Sodium tripolyphosphate, grinding 30min control the mass ratio of steel slag, water, dehydrated alcohol, sodium tripolyphosphate are as follows: 3:9:3:1；After grinding
Steel slag by weak magnetic magnetic separator carry out magnetic separation, sub-elect ferromagnetism concentrate and weak magnetic tailing, then weak magnetic tailing is passed through
Segmented intensity magnetic separator carries out magnetic separation, sub-elects concentrate and tailings；
(2) Tailings transportation after carrying out magnetic separation is preheated into preheater, controls preheating temperature at 650 DEG C, preheats 3h, preheating
Material be delivered in grinder and be ground 4h, the powder carry after grinding carries out calcination processing into calcining furnace,
2h is calcined at 1000~1100 DEG C, and 1300 DEG C are then warming up in 0.5h and keeps the temperature 2h again, is then sent to cooling storehouse in 0.5h
It is inside cooled to room temperature and obtains modified steel scoria；
(3) modified steel scoria filters out the steel slag of 0~25um by vibrating screening machine, and other insufficiently pulverized materials pass through transmission
Band, which is delivered in impact crusher, carries out second-time breakage, is then return in vibrating screening machine and is sieved, what is screened out changes
Property steel slag be sent into temporary storing bin in kept in；Modified steel scoria, flyash are passed through to metering pound respectively to weigh, silane coupling agent
Each group is distributed into blender according to the proportion by metering pump and is mixed, filler can be obtained.
The beneficial effects of the present invention are:
1, the monomer dissociation of the chromium slag in steel slag low intensity magnetic separation tailing can be guaranteed by carrying out grinding processing to steel slag before carrying out magnetic separation,
Improve the effect of sorting；
2, by first carrying out weak magnetic magnetic separation to the steel slag after grinding, rear progress ferromagnetism magnetic separation can effectively reduce magnesium in tailing
The content of picotite guarantees that steel slag tailing carries out subsequent mixed processing and can prepare the filler for meeting environmental requirement；
3, by being ground after being preheated to the steel slag after magnetic separation, surface modification treatment can be carried out to steel slag, enhances steel slag
Surface apertures distribution；Also, the steel slag after grinding is calcined, can be modified what acquisition in turn was had excellent performance to steel slag
Filler.
Detailed description of the invention
Fig. 1 is the schematic diagram of Comprehensive Utilization of Steel Slag processing system proposed by the present invention.
Fig. 2 is the schematic diagram that magnetic separation is carried out in Comprehensive Utilization of Steel Slag processing system.
Fig. 3 is influence of the different magnetic induction intensity to magnetic separation effect during magnetic separation.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated；It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention；Unless stated otherwise, the present invention uses reagent, method and apparatus is the art conventional reagents, method
And equipment.
Embodiment one
Referring to Fig. 1-2, a kind of Comprehensive Utilization of Steel Slag processing system, including steel slag separation system and filler preparation system；Steel slag sorting
System includes impeller breaker, oscillating feeder, magnetic separator, conveyer belt, preheater, grinder, calcining furnace, cooling storehouse, vibration
Screening machine and impact crusher；It is the impeller breaker, oscillating feeder, magnetic separator, preheater, grinder, calcining furnace, cold
But storehouse, vibrating screening machine and impact crusher are sequentially connected by conveyer belt, the preheater be used for just broken steel slag into
Row heating, the outlet end of the impact crusher pass through the temporary storing bin of conveyer belt bonding pad preparation system；
The filler preparation system includes conveyer belt, temporary storing bin, metering pound, blender, fine coal ash cellar and silane coupling agent tank, institute
It states temporary storing bin and blender is sequentially connected by conveyer belt, metering pound connects blender after weighing respectively to steel slag and flyash,
Silane coupling agent tank is connect by metering pump with blender, after the steel slag after sorting is stirred with flyash, silane coupling agent
It is prepared into filler.
Wherein, magnetic separator carry out magnetic separation method are as follows: oscillating feeder will just it is broken after steel slag be sent into wet type grinding bed, so
Magnetic separation is carried out by weak magnetic magnetic separator afterwards, sub-elects ferromagnetism concentrate and weak magnetic tailing；Weak magnetic tailing is passed through into segmentation again
Formula intensity magnetic separator carries out magnetic separation, sub-elects concentrate and tailings, and wherein tailing is sent into preheater by conveyer belt and carries out subsequent processing.
Preferably, when carrying out the processing of wet type grinding using wet type grinding bed, water and dehydrated alcohol is added as dispersing agent, three
Polyphosphate sodium controls the mass ratio of steel slag, water, dehydrated alcohol, sodium tripolyphosphate as retarder, grinding time 30min are as follows:
3:9:3:1, the steel slag partial size after grinding are less than 50um.
Wherein, the preheater is tubular heat exchanger, and heating temperature is 650 DEG C；The calcining furnace controls calcination temperature
It is 1000~1100 DEG C, calcination time 2h, 1300 DEG C is then warming up in 0.5h and keeps the temperature 2h.
Wherein, in the blender each material mass ratio are as follows: steel slag: flyash: silane coupling agent=20~30:15~
30:10~22；Wherein, silane coupling agent is vinyltriethoxysilane or vinyltrimethoxysilane.
The implementation method of the embodiment of the present invention specifically: carried out using following steps:
(1) it by steel slag discharging to hopper, is then delivered in impeller breaker by conveyer belt and is tentatively crushed, after just broken
Steel slag grinding is carried out into wet type grinding bed by oscillating feeder, and be added into wet type grinding bed water, dehydrated alcohol and
Sodium tripolyphosphate, grinding 30min control the mass ratio of steel slag, water, dehydrated alcohol, sodium tripolyphosphate are as follows: 3:9:3:1；After grinding
Steel slag by weak magnetic magnetic separator carry out magnetic separation, sub-elect ferromagnetism concentrate and weak magnetic tailing, then weak magnetic tailing is passed through
Segmented intensity magnetic separator carries out magnetic separation, sub-elects concentrate and tailings；
(2) Tailings transportation after carrying out magnetic separation is preheated into preheater, controls preheating temperature at 650 DEG C, preheats 3h, preheating
Material be delivered in grinder and be ground 4h, the powder carry after grinding carries out calcination processing into calcining furnace,
2h is calcined at 1000~1100 DEG C, and 1300 DEG C are then warming up in 0.5h and keeps the temperature 2h again, is then sent to cooling storehouse in 0.5h
It is inside cooled to room temperature and obtains modified steel scoria；
(3) modified steel scoria filters out the steel slag of 0~25um by vibrating screening machine, and other insufficiently pulverized materials pass through transmission
Band, which is delivered in impact crusher, carries out second-time breakage, is then return in vibrating screening machine and is sieved, what is screened out changes
Property steel slag be sent into temporary storing bin in kept in；Modified steel scoria, flyash are passed through to metering pound respectively to weigh, silane coupling agent
Each group is distributed into blender according to the proportion by metering pump and is mixed, filler can be obtained.
Embodiment two
The present embodiment provides a kind of Comprehensive Utilization of Steel Slag processing systems, compared with embodiment one, the difference is that, control weak magnetic magnetic
The magnetic induction intensity for selecting machine is 180mT；The magnetic induction intensity of the segmented intensity magnetic separator is 1200mT.
Remaining is all the same with embodiment one.
Magnetic separation separates a kind of method for separating as heads, has unique advantage in terms of concentration of valuable metals；
Since the mineral in steel slag containing chromium include fe-cr-ni alloy and magnesia chrome spinel, and since fe-cr-ni alloy has ferromagnetism, and
Magnesia chrome spinel has weak magnetic, and the difference of two kinds of magnetic minerals of experimental evidence is first sub-elected in steel slag with weak magnetic screening device
Then fe-cr-ni alloy recycles magnesia chrome spinel therein using strong magnetic separator to the tailing after low intensity magnetic separation, to make magnesium
Picotite can be enriched in magnetic concentrate, achieve the effect that reduce the chromium content in steel slag；Also, due to magnesium chromium
The size distribution of spinelle is within the scope of 15~50um, average particle size 26um, needs to carry out grinding processing before carrying out magnetic separation to protect
The granularity for demonstrate,proving low intensity magnetic separation tailing is less than 50um, just can guarantee the monomer dissociation of the magnesia chrome spinel in steel slag low intensity magnetic separation tailing, mentions
The effect of height sorting.
Before weak magnetic magnetic separation starts, the steel slag after grinding is added into weak magnetic magnetic separator, water is added to disperse material, toward magnetic
The magnetic induction intensity that magnetic separator size of current is added water to above magnetic pole and adjusted in machine to change coil is selected, with gaussmeter come really
Determine magnetic induction intensity；Operation time oscillation motor simultaneously adjusts tailings discharging speed, material after dispersion is added in magnetic separator, the magnetic separation phase
Between into magnetic separator constantly plus water dispersion and guarantee water position always in the top in magnetic field, when the tailing of magnetic separation has all been arranged
Out --- when pulp clarification in magnetic separator, stop plus water and with the outlet of closing magnetic separator；Close the oscillation of weak magnetic magnetic separator
Motor and current switch.
By concentrate filtering drying, the tailing ore pulp collected from tailing outlet is stood, and filtering drying after precipitating completely collects magnetic
Tailing is selected, weightometer calculates the yield of concentrate, concentrate and tailings are dissolved with acid, is surveyed with plasma scan spectrometer
Make the mass concentration of Cr element in two kinds of materials.
The magnetic induction intensity of segmented intensity magnetic separator can be adjusted in range from 0mT to 2000mT, by changing electric current
Magnetic induction intensity is adjusted to 400mT, 800mT, 1200mT, 1500mT and 1700mT respectively, is come with Cr content in concentrate and tailings
Determine the best magnetic induction intensity of high-intensity magnetic field sorting.
After the tailing that low intensity magnetic separation is generated is collected, into tailing plus water is sufficiently diluted, and diluted purpose is to allow
All tailings are dispersed in water, and guarantee the effect of magnetic separation；Then segmented intensity magnetic separator is added in sufficiently diluted tailing；Magnetic separation
Do not stop that tailing is discharged below magnetic separator in the process, is emptied completely to tailing, behind magnetic field of decorporating, sub-magnetic debris can be from the table of material
Emaciated face is from being discharged the concentrate of black particle.
After magnetic separation, the concentrate and tailings of acquisition are filtered by vacuum respectively, solid residue is put into vacuum drying
Case is dried, and is weighed concentrate Mass Calculation and is gone out concentrate yield, concentrate and tailings are dissolved with acid, are swept with plasma
Retouch the mass concentration that spectrometer determines Cr element in two kinds of materials.
Magnetic separation influence of the different magnetic induction intensity to magnetic separation effect in the process is indicated referring to Fig. 3, Fig. 3, from the figure 3, it may be seen that with
The increase of magnetic induction intensity, the Cr content of strongly magnetic mineral gradually rises, and the Cr content in tailing also gradually reduces, still
Amplitude of variation has differences.
When magnetic induction intensity is lower than 180mT, the Cr content of concentrate increases comparatively fast, while the Cr content in tailing mine also exists
This stage declines rapidly；When reaching 180mT, Cr content reaches peak value 3.8% in concentrate, and Cr content is reduced to minimum in tailing
Value 0.87%；When magnetic induction intensity is higher than 180mT, the Cr content of concentrate and tailings reaches 200mT almost without changing
When concentrate in Cr content improve only 0.8%, and Cr content does not still change in tailing；Therefore, according in concentrate and tailings
Cr changes of contents rule, determine that 180mT is the magnetic induction intensity of steel slag weak magnetic magnetic separation.
Meanwhile as seen from Figure 3, magnetic induction intensity influences the recycling of magnesia chrome spinel very big, and is to influence magnesium chromium
The principal element of spinelle separating effect carries out the magnetic separation effect that magnetic separation is conducive to improve magnesia chrome spinel using ferromagnetism.
When magnetic induction intensity is 400mT, the Cr content in concentrate can reach 0.81% or so, with magnetic induction intensity
It continues growing, the Cr content of concentrate is stepped up, and Cr content continues to decline in tailing, and the speed increased is getting faster.
When magnetic induction intensity increases to 1200mT, the Cr content in concentrate reaches peak 1.39%, Cr content in tailing
Reach minimum value 0.58%, the yield of concentrate is 50.2% at this time；And field strength be higher than 1200mT when, as field strength increases, in concentrate
Cr content starts to significantly decrease, and Cr content does not have significant change in tailing.
In the field strength of 1700mT, high intensity magnetic mineral Cr content has dropped 13.6%, but Cr content is still constant in tailing, this
Show that excessively high magnetic induction intensity sorts out magnesia chrome spinel and other non magnetic ores together, it is brilliant so as to cause magnesium chromium point
The separating effect of stone is deteriorated.
Therefore, by above-mentioned high intensity magnetic separation the result shows that, magnetic induction intensity be 1200mT when to weak magnetic magnetic separation after
Steel slag is sorted again, can get preferable separating effect and yield, therefore, selects the magnetic induction intensity of steel slag ferromagnetism magnetic separation
For 1200mT.
Therefore, the magnetic induction intensity for selecting control weak magnetic magnetic separator is 180mT；The magnetic induction of the segmented intensity magnetic separator
Intensity is 1200mT.
System steel slag of the invention passes through impeller breaker, oscillating feeder, magnetic separator, conveyer belt, preheater, grinding
Machine, calcining furnace, cooling storehouse, vibrating screening machine, impact crusher are isolated after carrying out magnetic separation, broken, preheating, calcining and screening
Harmless tailing in steel slag, finally by with flyash keep certain mass ratio can the good filler of processability, not only
Steel slag can be reduced and fill brought soil pollution and water pollution, additionally it is possible to be used to prepare filler, realize the money of steel slag
Sourceization processing, has applications well prospect.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (7)
1. a kind of Comprehensive Utilization of Steel Slag processing system, which includes steel slag separation system and filler preparation system；It is characterized in that,
The steel slag separation system include impeller breaker, oscillating feeder, magnetic separator, conveyer belt, preheater, grinder, calcining furnace,
Cooling storehouse, vibrating screening machine and impact crusher；The impeller breaker, oscillating feeder, magnetic separator, preheater, grinding
Machine, calcining furnace, cooling storehouse, vibrating screening machine and impact crusher are sequentially connected by conveyer belt, the preheater for pair
Just broken steel slag is heated, and the outlet end of the impact crusher passes through the temporary of conveyer belt bonding pad preparation system
Storehouse；
The filler preparation system includes conveyer belt, temporary storing bin, metering pound, blender, fine coal ash cellar and silane coupling agent tank, institute
It states temporary storing bin and blender is sequentially connected by conveyer belt, metering pound connects blender after weighing respectively to steel slag and flyash,
Silane coupling agent tank is connect by metering pump with blender, after the steel slag after sorting is stirred with flyash, silane coupling agent
It is prepared into filler.
2. a kind of Comprehensive Utilization of Steel Slag processing system according to claim 1, it is characterised in that: the magnetic separator carries out magnetic separation
Method are as follows: oscillating feeder will just it is broken after steel slag be sent into wet type grinding bed, then by weak magnetic magnetic separator carry out magnetic separation, point
Select ferromagnetism concentrate and weak magnetic tailing；Weak magnetic tailing is subjected to magnetic separation by segmented intensity magnetic separator again, sub-elects essence
Mine and tailing, wherein tailing is sent into preheater by conveyer belt and carries out subsequent processing.
3. a kind of Comprehensive Utilization of Steel Slag processing system according to claim 2, it is characterised in that: carried out using wet type grinding bed
When the processing of wet type grinding, water and dehydrated alcohol is added as dispersing agent, sodium tripolyphosphate is as retarder, grinding time
30min, control steel slag, water, dehydrated alcohol, sodium tripolyphosphate mass ratio are as follows: 3:9:3:1, the steel slag partial size after grinding are less than
50um。
4. a kind of Comprehensive Utilization of Steel Slag processing system according to claim 3, it is characterised in that: the magnetic of the weak magnetic magnetic separator
Induction is 180mT；The magnetic induction intensity of the segmented intensity magnetic separator is 1200mT.
5. a kind of Comprehensive Utilization of Steel Slag processing system according to claim 1, it is characterised in that: the preheater is shell and tube
Heat exchanger, heating temperature are 650 DEG C；The calcining furnace control calcination temperature is 1000~1100 DEG C, calcination time 2h, then
It is warming up to 1300 DEG C in 0.5h and keeps the temperature 2h.
6. a kind of Comprehensive Utilization of Steel Slag processing system according to claim 1, it is characterised in that: each material in the blender
Mass ratio are as follows: steel slag: flyash: silane coupling agent=20~30:15~30:10~22；Wherein, silane coupling agent is ethylene
Ethyl triethoxy silicane alkane or vinyltrimethoxysilane.
7. a kind of method that Comprehensive Utilization of Steel Slag processing system carries out slag processing described in -6 any one according to claim 1,
It is characterized by comprising following steps:
(1) it by steel slag discharging to hopper, is then delivered in impeller breaker by conveyer belt and is tentatively crushed, after just broken
Steel slag grinding is carried out into wet type grinding bed by oscillating feeder, and be added into wet type grinding bed water, dehydrated alcohol and
Sodium tripolyphosphate, grinding 30min control the mass ratio of steel slag, water, dehydrated alcohol, sodium tripolyphosphate are as follows: 3:9:3:1；After grinding
Steel slag by weak magnetic magnetic separator carry out magnetic separation, sub-elect ferromagnetism concentrate and weak magnetic tailing, then weak magnetic tailing is passed through
Segmented intensity magnetic separator carries out magnetic separation, sub-elects concentrate and tailings；
(2) Tailings transportation after carrying out magnetic separation is preheated into preheater, controls preheating temperature at 650 DEG C, preheats 3h, preheating
Material be delivered in grinder and be ground 4h, the powder carry after grinding carries out calcination processing into calcining furnace,
2h is calcined at 1000~1100 DEG C, and 1300 DEG C are then warming up in 0.5h and keeps the temperature 2h again, is then sent to cooling storehouse in 0.5h
It is inside cooled to room temperature and obtains modified steel scoria；
(3) modified steel scoria filters out the steel slag of 0~25um by vibrating screening machine, and other insufficiently pulverized materials pass through transmission
Band, which is delivered in impact crusher, carries out second-time breakage, is then return in vibrating screening machine and is sieved, what is screened out changes
Property steel slag be sent into temporary storing bin in kept in；Modified steel scoria, flyash are passed through to metering pound respectively to weigh, silane coupling agent
Each group is distributed into blender according to the proportion by metering pump and is mixed, filler can be obtained.
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