CN109513726A - A kind of steel slag recycling and reusing system and method - Google Patents
A kind of steel slag recycling and reusing system and method Download PDFInfo
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- CN109513726A CN109513726A CN201811435713.5A CN201811435713A CN109513726A CN 109513726 A CN109513726 A CN 109513726A CN 201811435713 A CN201811435713 A CN 201811435713A CN 109513726 A CN109513726 A CN 109513726A
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- steel slag
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 128
- 239000010959 steel Substances 0.000 title claims abstract description 128
- 239000002893 slag Substances 0.000 title claims abstract description 113
- 238000004064 recycling Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000007885 magnetic separation Methods 0.000 claims abstract description 49
- 238000000227 grinding Methods 0.000 claims abstract description 42
- 239000006148 magnetic separator Substances 0.000 claims abstract description 42
- 230000008929 regeneration Effects 0.000 claims abstract description 30
- 238000011069 regeneration method Methods 0.000 claims abstract description 30
- 238000001354 calcination Methods 0.000 claims abstract description 27
- 239000004576 sand Substances 0.000 claims abstract description 25
- 239000004568 cement Substances 0.000 claims abstract description 20
- 238000002360 preparation method Methods 0.000 claims abstract description 19
- 238000012216 screening Methods 0.000 claims abstract description 19
- 239000010881 fly ash Substances 0.000 claims abstract description 15
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 238000000926 separation method Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 34
- 239000012141 concentrate Substances 0.000 claims description 31
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 26
- 230000006698 induction Effects 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 21
- 238000012545 processing Methods 0.000 claims description 15
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 13
- 235000011152 sodium sulphate Nutrition 0.000 claims description 13
- 241000876852 Scorias Species 0.000 claims description 12
- 238000005303 weighing Methods 0.000 claims description 12
- 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
- 230000008569 process Effects 0.000 claims description 6
- 238000010792 warming Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- 238000000748 compression moulding Methods 0.000 claims description 3
- 230000029087 digestion Effects 0.000 claims description 3
- 239000002270 dispersing agent Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 238000003900 soil pollution Methods 0.000 abstract description 3
- 238000003911 water pollution Methods 0.000 abstract description 3
- 239000011651 chromium Substances 0.000 description 25
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 20
- 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
- 239000000654 additive Substances 0.000 description 9
- 230000000996 additive effect Effects 0.000 description 9
- 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
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 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
- 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
- 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
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 230000015271 coagulation Effects 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
- 238000001035 drying Methods 0.000 description 2
- 230000007613 environmental effect Effects 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
- 230000009467 reduction Effects 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
- 229910001341 Crude steel Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 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
- 238000005352 clarification Methods 0.000 description 1
- 239000003245 coal Substances 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
- 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
- 239000000945 filler Substances 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
- 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
- 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
- 238000000746 purification Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 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
- 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
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
-
- 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
- B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
- B09B3/45—Steam treatment, e.g. supercritical water gasification or oxidation
-
- 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)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention relates to a kind of steel slag recycling and reusing system and methods, it should include steel slag separation system and regeneration concrete preparation system, steel slag passes through impeller breaker, oscillating feeder, magnetic separator, conveyer belt, preheater, grinder, calcining furnace, cooling storehouse, vibrating screening machine is crushed, magnetic separation, preheating, grinding, the harmless tailing in steel slag is isolated after calcining and screening, finally by with flyash, sand, cement keeps certain mass ratio can the good regeneration concrete of processability, steel slag can not only be reduced and fill brought soil pollution and water pollution, it can also be used to prepare concrete, realize the recycling treatment of steel slag, has applications well prospect.
Description
Technical field
The present invention relates to a kind of processing system of waste, in particular to a kind of steel slag recycling and reusing system and 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 cement, 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 steel slag recycling and reusing 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 into
Row is broken, magnetic separation, preheating, grinding, harmless tailing in steel slag is isolated after calcining and screening, finally by with flyash, sand
Son, cement keep certain mass ratio can the good regeneration concrete of processability, steel slag landfill institute's band can not only be reduced
The soil pollution and water pollution come, additionally it is possible to be used to prepare concrete, realize the recycling treatment of steel slag.
Steel slag recycling and reusing system of the invention includes steel slag separation system and regeneration concrete preparation system, therein
The steel slag separation system include impeller breaker, oscillating feeder, magnetic separator, conveyer belt, preheater, grinder, calcining furnace,
Cooling storehouse and vibrating screening machine；The impeller breaker, oscillating feeder, magnetic separator, preheater, grinder, calcining furnace, cooling
Storehouse and vibrating screening machine are sequentially connected by conveyer belt, the preheater be used for by the broken steel slag of impeller breaker into
Row heating, the temporary storing bin that the outlet of the vibrating screening machine passes through transmission band connection regeneration concrete preparation system；
The regeneration concrete preparation system includes temporary storing bin, metering pound, blender, digester and press, the temporary storing bin
It is sequentially connected with blender by conveyer belt, metering pound connects blender, flyash, sand, cement, clear water after weighing to steel slag
Inputted in blender after being weighed respectively by weighing apparatus with sodium sulphate, the lower end of blender outlet connection digester, digester with
Press connection, steel slag after sorting and flyash, sand, cement, clear water and sodium sulphate is stirred and digests, suppress after make
For at regeneration concrete.
As further restriction of the invention, the method that the magnetic separator carries out magnetic separation are as follows: oscillating feeder will be just broken
Steel slag afterwards is sent into wet type grinding bed, then carries out magnetic separation by weak magnetic magnetic separator, sub-elects ferromagnetism concentrate and weak magnetic tail
Mine；Weak magnetic tailing is subjected to magnetic separation by segmented intensity magnetic separator again, sub-elects concentrate and tailings, wherein tailing passes through transmission
Band is sent into 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 percent of each material in the blender are as follows: steel slag 28%, sand
Sub 37%, cement 6%, flyash 24%, sodium sulphate 5%, clear water quality are the 5% of each material total amount, and wherein sand is partial size less than 5
The natural river sand of mm.
The invention further particularly discloses the sides that a kind of steel slag recycling and reusing 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 the modified steel scoria screened out is sent into temporary storing bin
It is kept in；Modified steel scoria is weighed by measuring pound, and flyash, sand, cement, clear water and sodium sulphate are led to respectively
It is inputted in blender after crossing weighing apparatus weighing, mixed material is sent into digestion process 20h in digester, weighs a certain amount of raw material and puts
Enter mold, with press compression moulding, is placed on after conserving 1d below room temperature and is put into steam pressure reactor, control briquetting pressure 25MPa
And pressure maintaining 7-9h, regeneration concrete can be prepared.
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, calcination processing is carried out again by grinding after preheating to the steel slag after magnetic separation, steel slag can be carried out at the modification of surface
Reason enhances the surface apertures distribution of steel slag.
Detailed description of the invention
Fig. 1 is the schematic diagram of steel slag recycling and reusing system proposed by the present invention；
Fig. 2 is the schematic diagram that magnetic separation is carried out in steel slag recycling and reusing 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 steel slag recycling and reusing system, including steel slag separation system and regeneration concrete preparation system,
In the steel slag separation system include impeller breaker, oscillating feeder, magnetic separator, conveyer belt, preheater, grinder, forge
Burn furnace, cooling storehouse and vibrating screening machine；The impeller breaker, oscillating feeder, magnetic separator, preheater, grinder, calcining
Furnace, cooling storehouse and vibrating screening machine are sequentially connected by conveyer belt, and the preheater is used for after impeller breaker is broken
Steel slag heated, the vibrating screening machine outlet by transmission band connection regeneration concrete preparation system temporary storing bin；
The regeneration concrete preparation system includes temporary storing bin, metering pound, blender, digester and press, the temporary storing bin
It is sequentially connected with blender by conveyer belt, metering pound connects blender, flyash, sand, cement, clear water after weighing to steel slag
Inputted in blender after being weighed respectively by weighing apparatus with sodium sulphate, the lower end of blender outlet connection digester, digester with
Press connection, steel slag after sorting and flyash, sand, cement, clear water and sodium sulphate is stirred and digests, suppress after make
For at regeneration concrete.
Wherein, the method that the magnetic separator carries out magnetic separation are as follows: oscillating feeder will it is just broken after steel slag be sent into wet type grinding
Then bed carries out magnetic separation by weak magnetic magnetic separator, sub-elects ferromagnetism concentrate and weak magnetic tailing；Weak magnetic tailing is passed through again
Segmented intensity magnetic separator carries out magnetic separation, sub-elects concentrate and tailings, and wherein tailing is carried out subsequent by conveyer belt feeding preheater
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.
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 the modified steel scoria screened out is sent into temporary storing bin
It is kept in；Modified steel scoria is weighed by measuring pound, and flyash, sand, cement, clear water and sodium sulphate are led to respectively
It is inputted in blender after crossing weighing apparatus weighing, mixed material is sent into digestion process 20h in digester, weighs a certain amount of raw material and puts
Enter mold, with press compression moulding, is placed on after conserving 1d below room temperature and is put into steam pressure reactor, control briquetting pressure 25MPa
And pressure maintaining 7-9h, regeneration concrete can be prepared.
Embodiment two
The present embodiment provides a kind of steel slag recycling and reusing 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.
Embodiment three
The present embodiment provides a kind of steel slag recycling and reusing systems, compared with embodiment one, two, the difference is that, control institute
The mass percent for stating each material in blender is steel slag 28%, sand 37%, cement 6%, flyash 24%, sodium sulphate 5%, clear water
Quality is the 5% of each material total amount, and wherein sand is natural river sand of the partial size less than 5 mm.
Remaining is all the same with embodiment one and embodiment two.
The regeneration concrete performance comparison of the different watering quantity preparations of table 1
By the comparison of table 1 it is found that watering quantity regeneration concrete performance prepared when being respectively 6% and 5% can reach requirement,
And standard is not achieved in the compression strength of regeneration concrete that watering quantity is prepared when being 4%, watering quantity is the regeneration concrete of 5% preparation
It is high compared with watering quantity 6% compression strength, so to be chosen to be 5% proper for watering quantity.
The regeneration concrete performance comparison of the different cement additive amount preparations of table 2
From table 2 it can be seen that with the increase of steel slag ratio in material, the reduction of cement additive amount, prepared regeneration coagulation
Native compression strength has apparent reduction, so selecting the additive amount of cement suitable 6% in comparison.
The regeneration concrete performance comparison of the different sand additive amount preparations of table 3
From table 3 according to formula preparation concrete performance can be seen that sand additive amount be 37% when, the agent on crack resistance of concrete of preparation
Compressive Strength highest, so sand additive amount is selected as 37% properly.
The regeneration concrete performance comparison of the different steel slag additive amount preparations of table 4
As can be seen from Table 4, when steel slag additive amount is 20%, the concrete crushing strength highest of preparation, but mesh of the invention
Be steel slag is recycled as far as possible, so the regeneration concrete performance that should choose preparation reaches requirement and steel slag adds
Therefore the most scheme of dosage selects steel slag additive amount that can not only ensure that the regeneration concrete performance prepared conforms to for 28%
It asks, additionally it is possible to which steel slag realization is recycled as far as possible.
Therefore, the mass percent of each material in the blender is controlled are as follows: steel slag 28%, sand 37%, cement 6%, fine coal
Grey 24%, sodium sulphate 5%, clear water quality are the 5% of each material total amount.
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 are crushed, are isolated in steel slag after magnetic separation, preheating, grinding, calcining and screening
Harmless tailing keeps certain mass ratio can the good regeneration coagulation of processability finally by with flyash, sand, cement
Soil can not only reduce steel slag and fill brought soil pollution and water pollution, additionally it is possible to be used to prepare concrete, realize
The recycling treatment of steel slag 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 steel slag recycling and reusing system, which includes steel slag separation system and regeneration concrete preparation system；It is special
Sign is, the steel slag separation system include impeller breaker, oscillating feeder, magnetic separator, conveyer belt, preheater, grinder,
Calcining furnace, cooling storehouse and vibrating screening machine；The impeller breaker, oscillating feeder, magnetic separator, preheater, grinder, calcining
Furnace, cooling storehouse and vibrating screening machine are sequentially connected by conveyer belt, and the preheater is used for after impeller breaker is broken
Steel slag heated, the vibrating screening machine outlet by transmission band connection regeneration concrete preparation system temporary storing bin；
The regeneration concrete preparation system includes temporary storing bin, metering pound, blender, digester and press, the temporary storing bin
It is sequentially connected with blender by conveyer belt, metering pound connects blender, flyash, sand, cement, clear water after weighing to steel slag
Inputted in blender after being weighed respectively by weighing apparatus with sodium sulphate, the lower end of blender outlet connection digester, digester with
Press connection, steel slag after sorting and flyash, sand, cement, clear water and sodium sulphate is stirred and digests, suppress after make
For at regeneration concrete.
2. a kind of steel slag recycling and reusing 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 steel slag recycling and reusing 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 steel slag recycling and reusing 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 steel slag recycling and reusing 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 steel slag recycling and reusing system according to claim 1, it is characterised in that: each material in the blender
Mass percent are as follows: steel slag 28%, sand 37%, cement 6%, flyash 24%, sodium sulphate 5%, clear water quality be each material total amount
5%, wherein sand is natural river sand of the partial size less than 5 mm.
7. a kind of steel slag recycling and reusing system described in -6 any one prepares the side of regeneration concrete according to claim 1
Method, characterized by 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 the modified steel scoria screened out is sent into temporary storing bin
It is kept in；Modified steel scoria is weighed by measuring pound, and flyash, sand, cement, clear water and sodium sulphate are led to respectively
It is inputted in blender after crossing weighing apparatus weighing, mixed material is sent into digestion process 20h in digester, weighs a certain amount of raw material and puts
Enter mold, with press compression moulding, is placed on after conserving 1d below room temperature and is put into steam pressure reactor, control briquetting pressure 25MPa
And pressure maintaining 7-9h, regeneration concrete can be prepared.
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| CN111659702A (en) * | 2020-06-15 | 2020-09-15 | 遵义永航再生资源利用有限公司 | Method for recycling and reprocessing scrap steel |
| CN112045864A (en) * | 2020-08-19 | 2020-12-08 | 新疆互力佳源环保科技有限公司 | Steel slag resource recovery screening system for steel production |
| CN112138759A (en) * | 2020-08-11 | 2020-12-29 | 南昌航空大学 | Renewable concrete building solid waste separation device |
| CN113318838A (en) * | 2021-05-28 | 2021-08-31 | 王庆乐 | Steel smelting tailing treatment process |
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