CN109811094A - A kind of device and method using blowing process pretreatment steel slag - Google Patents
A kind of device and method using blowing process pretreatment steel slag Download PDFInfo
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- CN109811094A CN109811094A CN201910165443.9A CN201910165443A CN109811094A CN 109811094 A CN109811094 A CN 109811094A CN 201910165443 A CN201910165443 A CN 201910165443A CN 109811094 A CN109811094 A CN 109811094A
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- Prior art keywords
- slag
- blowing
- valve
- steel
- steel slag
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- 239000002893 slag Substances 0.000 title claims abstract description 160
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 85
- 239000010959 steel Substances 0.000 title claims abstract description 85
- 238000007664 blowing Methods 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 46
- 230000008569 process Effects 0.000 title claims abstract description 21
- 239000000428 dust Substances 0.000 claims abstract description 72
- 238000002347 injection Methods 0.000 claims abstract description 59
- 239000007924 injection Substances 0.000 claims abstract description 59
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000000463 material Substances 0.000 claims abstract description 36
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 35
- 239000007788 liquid Substances 0.000 claims abstract description 28
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000005453 pelletization Methods 0.000 claims abstract description 16
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 11
- 239000002918 waste heat Substances 0.000 claims abstract description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 4
- 230000003447 ipsilateral effect Effects 0.000 claims abstract description 4
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 4
- 239000011574 phosphorus Substances 0.000 claims abstract description 4
- 239000007921 spray Substances 0.000 claims description 42
- 238000009792 diffusion process Methods 0.000 claims description 13
- 230000008676 import Effects 0.000 claims description 12
- 239000003245 coal Substances 0.000 claims description 8
- 239000000571 coke Substances 0.000 claims description 8
- 238000009628 steelmaking Methods 0.000 claims description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 6
- 239000003546 flue gas Substances 0.000 claims description 6
- 238000010791 quenching Methods 0.000 claims description 5
- 230000000171 quenching effect Effects 0.000 claims description 5
- 239000004744 fabric Substances 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 238000007781 pre-processing Methods 0.000 claims 1
- 238000004080 punching Methods 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 18
- 239000002699 waste material Substances 0.000 abstract description 8
- 238000011084 recovery Methods 0.000 abstract description 7
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 abstract description 6
- 229940056319 ferrosoferric oxide Drugs 0.000 abstract description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract description 2
- 239000000155 melt Substances 0.000 abstract description 2
- 239000000243 solution Substances 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 8
- 229910052742 iron Inorganic materials 0.000 description 7
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 239000000292 calcium oxide Substances 0.000 description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000006722 reduction reaction Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010410 dusting Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- 238000007885 magnetic separation Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 229910001341 Crude steel Inorganic materials 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 206010020852 Hypertonia Diseases 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 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
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- BCAARMUWIRURQS-UHFFFAOYSA-N dicalcium;oxocalcium;silicate Chemical compound [Ca+2].[Ca+2].[Ca]=O.[O-][Si]([O-])([O-])[O-] BCAARMUWIRURQS-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 235000021321 essential mineral Nutrition 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- -1 i.e. Chemical compound 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- VASIZKWUTCETSD-UHFFFAOYSA-N manganese(II) oxide Inorganic materials [Mn]=O VASIZKWUTCETSD-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 235000019976 tricalcium silicate Nutrition 0.000 description 1
- 229910021534 tricalcium silicate Inorganic materials 0.000 description 1
- 229910000859 α-Fe Inorganic materials 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
- 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
Landscapes
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention relates to a kind of device and methods using blowing process pretreatment steel slag, and it is low to solve treatment effeciency existing for existing apparatus for treating steel slags and method, causes a large amount of waste residues to be accumulated, the steel slag rate of recovery is low, the technical issues of resulting in waste of resources.The technical solution adopted by the present invention is that: a kind of device using blowing process pretreatment steel slag is made of, the injection system is set to the two sides or ipsilateral of slag ladle transportation system with dust pelletizing system depending on the site environment injection system, slag ladle transportation system and dust pelletizing system；A method of steel slag is pre-processed using above-mentioned apparatus, with nitrogen as blowing media, the carbon containing thin material of 35% or more phosphorus content is sprayed into liquid steel slag by injection system, using the waste heat promotion carbon of liquid steel slag and reacting for ferriferous oxide, then carries out subsequent slag stewing processing again.The melt substance that the present invention promotes high-temperature steel slag to generate based on ferroso-ferric oxide and iron, to improve subsequent slag stewing efficiency, to improve the recovery efficiency of slag steel.
Description
Technical field
The invention belongs to pneumatic steelmaking solid waste recovery technology fields, and in particular to a kind of to pre-process steel slag using blowing process
Device and method.
Background technique
Steel slag is the waste residue generated in metallurgical industry, and generation rate is the 8%~15% of crude steel yield, the 2012 years whole world
Arrange about 1.8 hundred million t of steel slag amount.The steel slag yield of China is incremented by rapidly with the fast development of steel and iron industry, therefore, steel enterprise
The processing of industry waste residue and resource utilization problem are also increasingly taken seriously.The essential mineral group of steel slag becomes tricalcium silicate, silicon
Sour dicalcium, dicalcium ferrite, RO magnesium, iron, manganese oxide, i.e., FeO, MgO, MnO formed solid solution, free lime f-CaO
Deng.
The steel slag that domestic iron and steel enterprises generate cannot be handled in time completely, cause a lot of steel slag land occupation, pollute environment.
Component can be utilized containing a large amount of slag steel, calcium oxide, iron and magnesia etc. in steel slag.Country's steel slag main process at present
Have: the stewing method of hot application method, wind quenching method, drum process, granulating wheel method, heat.Wherein the stewing method of hot application method, drum process, heat is the most commonly used.
The steel slag boiled in a covered pot over a slow fire digs out loaded machine from braised slag pool by excavator and transports to diagrid feed bin, sieves powder by diagrid, greatly
Grade enters fracture area, plays weight by electromagnetic disc and smashes bulk steel slag, returns again to slag processing production line；It is crushed
Steel slag afterwards carries out sizing screening recycling, reaches the material that converter, blast furnace and sintering use, last 40-50% low iron content
The steel slag of amount is handled at a low price after carrying out outlet.Due to using steel slag making cement and tile product usage amount accounting deficiency steel mill outlet at present
The 10% of steel slag, cause ferrous material cannot recycle and the accumulation of a large amount of waste residue can not utilize.So to create iron and steel enterprise
Economy and environmental benefit are made, the recycle value for selecting suitable pretreating process and utilization ways to develop steel slag is very must
Will with it is urgent.
Summary of the invention
The purpose of the present invention is to solve treatment effeciency existing for existing apparatus for treating steel slags and method is low, cause big
Waste residue accumulation is measured, the steel slag rate of recovery is low, the technical issues of result in waste of resources, provides and a kind of utilizes blowing process pretreatment steel slag
Device and method.
In order to solve the above technical problems, the technical solution adopted by the present invention is that:
A kind of device using blowing process pretreatment steel slag, is made of injection system, slag ladle transportation system and dust pelletizing system,
The injection system is set to the two sides or ipsilateral of slag ladle transportation system with dust pelletizing system depending on the site environment；
The injection system includes feed bin, injection tank, blowing valve, helps and blow valve, injection pipeline, blowing hose, manipulator, branch
Support, spray gun, distributor, diffusion valve, ball valve, ram valve and mixer；The discharge port of the feed bin passes through ball valve and injection tank
Feed inlet connection, the top of the injection tank is equipped with diffusion valve, and the lower part of injection tank is equipped with ram valve, the discharge port of injection tank
Place is equipped with blowing valve, and the outlet of the blowing valve and the feed inlet of mixer connect, and the air inlet of the mixer passes through silk mouth
It is connect with the outlet for blowing valve is helped, described help is blown valve and connect with nitrogen pipeline, the outlet of the mixer and the import of injection pipeline
Connection, the injection pipeline outlet are connect with the import of blowing hose, and the outlet of the blowing hose and the import of distributor connect
It connects, the distributor is set on a robotic arm, and the manipulator is fixed by support frame, and the spray gun passes through silk mouth and distributor
Outlet connection；
The slag ladle transportation system includes slag ladle and tractor, and the slag ladle is located on tractor and is located under spray gun
Side；
The dust pelletizing system includes dust excluding hood I, dust excluding hood II, pipeline of dust collector, deduster, unloading valve, blower and chimney；
The dust excluding hood I is located at the top of slag ladle and is fixed by support frame, deviates on dust excluding hood I and is equipped with spray gun at the position of dust collecting opening
Hatchway, the dust excluding hood II are located at the top of feed bin, and the dust collecting opening of dust excluding hood I and dust excluding hood II passes through pipeline of dust collector respectively
It is connect with the entrance of deduster, the lower part of the deduster is equipped with unloading valve, and the import of the blower and the outlet of deduster connect
It connects, the outlet connection of the chimney and blower.
Further, the top of the deduster is equipped with rain-proof shelter.
Further, the manipulator is controlled by adjustable electric hydraulic push rod.
A method of steel slag being pre-processed using above-mentioned apparatus, the liquid steel slag after steel-making is fitted into slag ladle, and
Slag ladle is drawn at injection system by tractor, then with nitrogen as blowing media, by injection system by phosphorus content
35% or more carbon containing thin material sprays into the liquid steel slag in slag ladle, promotes carbon and ferriferous oxide using the waste heat of liquid slag
Reaction, then carries out subsequent slag stewing processing again.
Further, 120 mesh of partial size material content below is not less than 80% in the carbon containing thin material.
Further, the carbon containing thin material is that dry coke quenching dedusting ash, the dedusting ash of ground station for dust removal, blast furnace cloth bag remove
Any one in the mud coal that dust, blast furnace coke bin dedusting ash or coal washing generate.
Further, the blowing time of the carbon containing thin material is 3-5min.
Further, the dosage of the carbon containing thin material and the weight ratio of steel slag are 0.03-0.07kg/kg.
Further, the method for the pretreatment steel slag, the specific steps are as follows:
1) ball valve and diffusion valve are opened, the carbon containing thin material in feed bin is put into injection tank, when carbon containing thin in injection tank
When volume of material reaches the 80% of blowing tank volume, ball valve and diffusion valve are closed, ram valve is opened, when the pressure in injection tank reaches
When to 0.25-0.50MPa, ram valve is closed, opens dust pelletizing system at the same time；
2) liquid steel slag after steel-making is fitted into slag ladle, is drawn to slag ladle at injection system simultaneously by tractor
It is placed in the lower section of dust excluding hood I；
3) it opens to help and blows valve, start nitrogen-blow, jetting pressure is controlled in 0.15-0.25MPa；
4) spray gun is inserted into slag ladle at the position away from slag ladle bottom 400mm high by manipulator, opens blowing valve, makes to be blown
Carbon containing thin material and nitrogen in tank are sufficiently mixed in mixer, then pass through injection pipeline, blowing hose, distributor and spray
Rifle sprays into high temperature slag liquid, and the height of spray gun is stepped up by manipulator after being blown 30s, when spray gun away from slag liquid plane also
Blowing valve is closed when 200mm, after continuing blowing 2 minutes, spray gun is removed into slag ladle, is closed to help after spray gun is cooling and is blown valve stopping spray
Nitrogen blowing；The flue gas that blowing process generates, is collected into deduster by dust excluding hood I and dust excluding hood II by pipeline of dust collector, powder
Dirt is discharged after deduster blowback by unloading valve, and blower is the power source of dust pelletizing system operation, and the flue gas of generation is arranged through chimney
Enter in atmosphere；
5) slag ladle is removed by tractor by blowing position after being blown, slag ladle carries out subsequent slag stewing operation.
The beneficial effects of the present invention are:
1, pretreatment of slag device of the invention is realized by injection system, slag ladle transportation system and dust pelletizing system to steel
Subsequent steel slag hot disintegrating efficiency, the bored slag effect of enhancing is substantially improved in the high-efficiency pretreatment of slag, which can be carried out continuously, can
So that iron and steel enterprise is realized the continuous production of slag processing, promotes the degree of automation of Technology of Steel Slag Processing, reduces the labor of worker
Fatigue resistance, and it is effectively utilized waste and old resource, it has high economic benefit.
2, pretreatment of slag method of the invention mainly sprays into carbon containing thin material in liquid steel slag by injection system, benefit
With the waste heat promotion carbon of liquid slag and reacting for ferriferous oxide, the direct recycling ratio of ferro element is on the one hand improved；On the other hand
The generation for promoting the ferrous oxide and ferroso-ferric oxide of easy magnetic separation, improves the rate of recovery of ferro element.
3, the present invention use it is carbon containing containing thin material be industry generation recyclable carbonaceous material, as dry coke quenching dedusting ash,
The mud coal etc. that the carbon containing high dedusting ash of the dedusting ash of ground station for dust removal, blast furnace cloth bag, blast furnace coke bin dedusting ash or coal washing generate
As blowing preferred raw material after drying materials, the recycling of enterprises is realized, energy conservation and environmental protection further increases the warp of blowing
Ji benefit.
4, the present invention is using the iron oxide and particulate carbon dust generation reduction reaction in high-temperature liquid state steel slag, to promote high-temperature steel
Slag generates the melt substance based on ferroso-ferric oxide and iron, to improve subsequent efficiency of magnetic separation, to improve the recycling of slag steel
Efficiency；5% or more is improved in original basis for making steel the slag steel rate of recovery used, is improved for being sintered the steel-making slag powder rate of recovery used
10% or more, make the iron-content (TFe) of tailings lower than 3%.
5, it is endothermic process that carbon containing thin material is reacted with the ferriferous oxide in slag in the present invention, is facilitated during the reaction
The quick reduction of steel slag temperature, due to the reduction of steel slag temperature, blowing gas and carbon and iron oxide that the viscosity increase of molten steel makes
Liquid steel slag cannot be completely discharged in the gas that reaction generates, and residual gas freezes solidly in steel slag, increase the hole after steel slag freezes off
Gap rate makes steel slag be easier fragmentation, dusting during slag stewing, improves slag stewing efficiency and reduces back stewing ratio, improves slag stewing facility
Service efficiency；Since porosity increases, the more advantageous free calcium oxide in steel slag f-CaO later period after the specific surface area increase of steel slag
Dusting processing.
6, increase through the pretreated steel slag porosity of the present invention, further decrease the processed broken difficulty of steel slag, add
The power consumption of work process and the more other slag processing modes of the loss of fine grinding equipment reduce.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of apparatus of the present invention；
In figure: 1- feed bin；2- injection tank；3- blowing valve；4-, which is helped, blows valve；5- injection pipeline；6- is blown hose；7- is mechanical
Hand；8- support frame；9- spray gun；10- slag ladle；11- tractor；12- dust excluding hood I；13- pipeline of dust collector；14- deduster；15- is anti-
Awning；16- unloading valve；17- blower；18- chimney；19- distributor, 20- diffusion valve；21- ball valve；22- ram valve；23- mixing
Device；24- dust excluding hood II.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
As shown in Figure 1, device of one of the present embodiment using blowing process pretreatment steel slag, by injection system, slag ladle
Transportation system and dust pelletizing system composition, the injection system and dust pelletizing system are set to slag ladle transportation system depending on the site environment
Two sides are ipsilateral；
The injection system includes feed bin 1, injection tank 2, blowing valve 3, helps and blow valve 4, injection pipeline 5, blowing hose 6, machine
Tool hand 7, support frame 8, spray gun 9, distributor 19, diffusion valve 20, ball valve 21, ram valve 22 and mixer 23；The feed bin 1 goes out
Material mouth is connect by ball valve 21 with the feed inlet of injection tank 2, and the top of the injection tank 2 is equipped with diffusion valve 20, under injection tank 2
Portion is equipped with ram valve 22, and the discharge outlet of injection tank 2 is equipped with blowing valve 3, the outlet of the blowing valve 3 and the charging of mixer 23
The air inlet of mouth connection, the mixer 23 is connect by silk mouth with the outlet for blowing valve 4 is helped, and described help blows valve 4 and nitrogen pipeline
Connection, the outlet of the mixer 23 and the import of injection pipeline 5 pass through flanged joint, the outlet and spray of the injection pipeline 5
The import for blowing hose 6 is connected by quick coupling, and the outlet of the blowing hose 6 and the import of distributor 19 pass through quick coupling
Connection, the distributor 19 are bolted on manipulator 7, and the manipulator 7 is fixed by support frame 8, the machinery
Hand 7 is controlled by adjustable electric hydraulic push rod, has not only been able to achieve the adjusting of 9 stringer height of spray gun, but also can realize mobile spray gun 10
Controllably, support frame 8 is steel structure frame, and the spray gun 9 is connect by silk mouth with the outlet of distributor 19.
The slag ladle transportation system includes slag ladle 10 and tractor 11, and the slag ladle 10 is located on tractor 11 and is located at spray
The lower section of rifle 9；
The dust pelletizing system include dust excluding hood I 12, dust excluding hood II 24, pipeline of dust collector 13, deduster 14, rain-proof shelter 15,
Unloading valve 16, blower 17 and chimney 18；The dust excluding hood I 12 is located at the top of slag ladle 10 and, dust excluding hood fixed by support frame 8
Deviate on I 12 and be equipped with spray gun hatchway at the position of dust collecting opening, spray gun hatchway is sealed using high temperature resistant pad, the dedusting
Cover II 24 tops for being located at feed bin 1, the dust collecting opening of dust excluding hood I 12 and dust excluding hood II 24 passes through pipeline of dust collector 13 and dedusting respectively
The entrance of device 14 connects, and the lower part of the deduster 14 is equipped with unloading valve 16, the import of the blower 17 and going out for deduster 14
Mouth connection, the chimney 18 are connect with the outlet of blower 17；The top of the deduster 14 is equipped with rain-proof shelter 15.
One of the present embodiment using above-mentioned apparatus pretreatment steel slag method, including that will make steel after liquid steel
Slag is fitted into slag ladle 10, and slag ladle 10 is drawn at injection system by tractor 11, then with nitrogen as blowing media,
The carbon containing thin material of 35% or more phosphorus content is sprayed into the liquid steel slag in slag ladle 10 by injection system, carbon containing thin material
The blowing time is 3-5min, using the waste heat promotion carbon of liquid slag and reacting for ferriferous oxide, then carries out subsequent slag stewing again
Processing.
The carbon containing thin material is dry coke quenching dedusting ash, the dedusting ash of ground station for dust removal, the dedusting ash of blast furnace cloth bag, blast furnace
Any one in the mud coal that coke bin dedusting ash or coal washing generate.120 mesh of partial size material below contains in the carbon containing thin material
Amount is not less than 80%.The dosage of the carbon containing thin material and the weight ratio of steel slag are 0.03-0.07kg/kg.
Specific step is as follows:
1) ball valve 21 and diffusion valve 20 are opened, the carbon containing thin material in feed bin 1 is put into injection tank 2, when in injection tank 2
When carbon containing thin volume of material reaches the 80% of blowing tank volume, ball valve 21 and diffusion valve 20 are closed, ram valve 22 is opened, works as blowing
(spray gun 9 is avoided to block in steel slag liquid level, hypertonia leads to slag liquid when pressure in tank 2 reaches 0.25-0.50MPa
Splash), ram valve 22 is closed, opens dust pelletizing system at the same time；
2) liquid steel slag after steel-making is fitted into slag ladle 10, slag ladle 10 is drawn to by blowing system by tractor 11
The lower section of dust excluding hood I 12 is placed at system；
3) it opens to help and blows valve 4, start nitrogen-blow, jetting pressure is controlled in 0.15-0.25MPa；
4) spray gun 9 is inserted into slag ladle 10 at the position away from slag ladle bottom 400mm high by manipulator 7, opens blowing valve 3,
It is sufficiently mixed carbon containing thin material and nitrogen in injection tank 2 in mixer 23, then passes through injection pipeline 5, blowing hose
6, distributor 19 and spray gun 9 spray into high temperature slag liquid, (are improved after being blown 30s by the height that manipulator 7 steps up spray gun 9
Speed: press 0.2-0.4 meter per minute), when spray gun 9 away from slag liquid plane there are also when 200mm close blowing valve 3, continue be blown 2 minutes
Afterwards, spray gun 9 is removed into slag ladle 10, closes to help after spray gun 9 is cooling and blows the stopping nitrogen-blow of valve 4；The flue gas that blowing process generates,
It is collected into deduster 14 by dust excluding hood I 12 and dust excluding hood II 24 by pipeline of dust collector 13, dust is after 14 blowback of deduster
It is discharged by unloading valve 16, blower 17 is the power source of dust pelletizing system operation, and the flue gas of generation is discharged into atmosphere through chimney 18；
5) slag ladle 10 is removed by tractor 11 by blowing position after being blown, slag ladle 10 carries out subsequent slag stewing operation.
Claims (9)
1. a kind of device using blowing process pretreatment steel slag, it is characterised in that: by injection system, slag ladle transportation system and dedusting
System composition, the injection system are set to the two sides or ipsilateral of slag ladle transportation system with dust pelletizing system depending on the site environment；
The injection system include feed bin (1), injection tank (2), blowing valve (3), help blow valve (4), injection pipeline (5), blowing it is soft
Manage (6), manipulator (7), support frame (8), spray gun (9), distributor (19), diffusion valve (20), ball valve (21), ram valve (22) and
Mixer (23)；The discharge port of the feed bin (1) is connect by ball valve (21) with the feed inlet of injection tank (2), the injection tank
(2) top is equipped with diffusion valve (20), and the lower part of injection tank (2) is equipped with ram valve (22), and the discharge outlet of injection tank (2) is equipped with
The outlet of blowing valve (3), the blowing valve (3) is connect with the feed inlet of mixer (23), the air inlet of the mixer (23)
It is connect by silk mouth with the outlet for blowing valve (4) is helped, described help is blown valve (4) and connect with nitrogen pipeline, and the mixer (23) goes out
Mouth is connect with the import of injection pipeline (5), and injection pipeline (5) outlet is connect with the import of blowing hose (6), the blowing
The outlet of hose (6) is connect with the import of distributor (19), and the distributor (19) is located on manipulator (7), the manipulator
(7) fixed by support frame (8), the spray gun (9) is connect by silk mouth with the outlet of distributor (19)；
The slag ladle transportation system includes slag ladle (10) and tractor (11), and the slag ladle (10) is located on tractor (11) and position
In the lower section for being located at spray gun (9)；
The dust pelletizing system includes dust excluding hood I (12), dust excluding hood II (24), pipeline of dust collector (13), deduster (14), unloading valve
(16), blower (17) and chimney (18)；The dust excluding hood I (12) is located at the top of slag ladle (10) and is fixed by support frame (8),
Deviate on dust excluding hood I (12) and be equipped with spray gun hatchway at the position of dust collecting opening, the dust excluding hood II (24) is located at the upper of feed bin (1)
The dust collecting opening of side, dust excluding hood I (12) and dust excluding hood II (24) passes through the entrance of pipeline of dust collector (13) Yu deduster (14) respectively
The lower part of connection, the deduster (14) is equipped with unloading valve (16), the import of the blower (17) and the outlet of deduster (14)
Connection, the chimney (18) connect with the outlet of blower (17).
2. a kind of device using blowing process pretreatment steel slag according to claim 1, it is characterised in that: the deduster
(14) top is equipped with rain-proof shelter (15).
3. a kind of device using blowing process pretreatment steel slag according to claim 1, it is characterised in that: the manipulator
(7) it is controlled by adjustable electric hydraulic push rod.
4. a kind of method using claim 1-3 any one described device pretreatment steel slag, it is characterised in that: tie steel-making
Liquid steel slag after beam is fitted into slag ladle (10), and slag ladle (10) is drawn at injection system by tractor (11), then
With nitrogen as blowing media, the carbon containing thin material of 35% or more phosphorus content is sprayed by the liquid in slag ladle (10) by injection system
In state steel slag, using the waste heat promotion carbon of liquid slag and reacting for ferriferous oxide, subsequent slag stewing processing is then carried out again.
5. the method for pretreatment steel slag according to claim 4, it is characterised in that: partial size 120 in the carbon containing thin material
Mesh material content below is not less than 80%.
6. the method for pretreatment steel slag according to claim 4, it is characterised in that: the carbon containing thin material removes for dry coke quenching
Appointing in the mud coal that dust, the dedusting ash of ground station for dust removal, the dedusting ash of blast furnace cloth bag, blast furnace coke bin dedusting ash or coal washing generate
It anticipates one kind.
7. the method for pretreatment steel slag according to claim 4, it is characterised in that: the blowing time of the carbon containing thin material
For 3-5min.
8. the method for pretreatment steel slag according to claim 4, it is characterised in that: the dosage and steel of the carbon containing thin material
The weight ratio of slag is 0.03-0.07kg/kg.
9. pre-processing the method for steel slag according to claim 4-8 any one, which is characterized in that specific step is as follows:
1) ball valve (21) and diffusion valve (20) are opened, the carbon containing thin material in feed bin (1) is put into injection tank (2), blowing is worked as
When carbon containing thin volume of material reaches the 80% of blowing tank volume in tank (2), ball valve (21) and diffusion valve (20) are closed, opens punching press
Valve (22) closes ram valve (22) when the pressure in injection tank (2) reaches 0.25-0.50MPa, opens dedusting at the same time
System；
2) liquid steel slag after steel-making is fitted into slag ladle (10), slag ladle (10) is drawn to by blowing by tractor (11)
The lower section of dust excluding hood I (12) is placed at system；
3) it opens to help and blow valve (4), start nitrogen-blow, jetting pressure is controlled in 0.15-0.25MPa；
4) spray gun (9) are inserted into slag ladle (10) at the position away from slag ladle bottom 400mm high by manipulator (7), open blowing valve
(3), carbon containing thin material and nitrogen in injection tank (2) are sufficiently mixed in mixer (23), then passes through injection pipeline
(5), hose (6), distributor (19) and spray gun (9) are blown to spray into high temperature slag liquid, is blown after 30s through manipulator (7) gradually
Improve spray gun (9) height, when spray gun (9) away from slag liquid plane there are also when 200mm close blowing valve (3), avoid slag liquid that from cannot hiding
Gear blowing material, causes slag liquid to be overflowed, and after continuing blowing 2 minutes, spray gun (9) is removed slag ladle (10), after spray gun (9) are cooling
Closing, which helps, blows valve (4) stopping nitrogen-blow；The flue gas that blowing process generates, is passed through by dust excluding hood I (12) and dust excluding hood II (24)
Pipeline of dust collector (13) is collected into deduster (14), and dust is discharged after deduster (14) blowback by unloading valve (16), wind
Machine (17) is the power source of dust pelletizing system operation, and the flue gas of generation is discharged into atmosphere through chimney (18)；
5) slag ladle (10) are removed blowing position by tractor (11) after being blown, slag ladle (10) carries out subsequent slag stewing work
Industry.
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Cited By (1)
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