CN106745960A - A kind of method for making steel refining dedusting ash comprehensive utilization - Google Patents
A kind of method for making steel refining dedusting ash comprehensive utilization Download PDFInfo
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- CN106745960A CN106745960A CN201611051488.6A CN201611051488A CN106745960A CN 106745960 A CN106745960 A CN 106745960A CN 201611051488 A CN201611051488 A CN 201611051488A CN 106745960 A CN106745960 A CN 106745960A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/80—Destroying solid waste or transforming solid waste into something useful or harmless involving an extraction step
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/30—Obtaining zinc or zinc oxide from metallic residues or scraps
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B47/00—Obtaining manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/727—Treatment of water, waste water, or sewage by oxidation using pure oxygen or oxygen rich gas
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/203—Iron or iron compound
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/206—Manganese or manganese compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The present invention relates to a kind of method for making steel refining dedusting ash comprehensive utilization, the present invention is using steel-making refining dedusting ash come the cold rolling acid waste water of neutralisation treatment, using alkaline matters such as the CaO refined in dedusting ash, the cold rolling acid waste water of neutralisation treatment, make waste water by aeration, neutralize, PH is adjusted, the processes such as flocculating setting and reach discharge standard, refining dedusting ash is made steel simultaneously and rolls Fe in acid waste water, the valuable elements such as Zn enter in the sludge of precipitation, sludge is through dehydration, press filtration obtains mud cake, by obtaining metallized pellet and zinc-rich dust after high temperature reduction PROCESS FOR TREATMENT, reclaim Fe, the valuable elements such as Zn.The present invention is processed simultaneously steel-making refining dedusting ash and cold rolling acid waste water, solve the problem in environmental protection, realize the treatment of wastes with processes of wastes against one another, recyclable steel-making simultaneously refines the valuable elements such as Fe, Zn, Mn in dedusting ash and cold rolling acid waste water, the recycling of resource is realized, economic benefit and environmental benefit with highly significant.
Description
Technical field
The invention belongs to comprehensive utilization of resources field, it is related to a kind of method for making steel refining dedusting ash comprehensive utilization.
Background technology
Refining furnace is a kind of smelting equipment of hot-working industry, can be completed in refining furnace molten steel degassing, be tuned into part,
Temperature regulating, the function such as go to be mingled with.In refinery processes are made steel, the fines part in partial metallurgical raw material can be by dedusting
System is drawn into ash silo, the chief component as steel-making refining dedusting ash, in addition, in refining process, part supplementary material
In the presence of high temperature, vaporize, a series of chemical reaction occur in vaporescence, into dust pelletizing system pipeline with
Afterwards by cooling rapidly, also into the ash silo of dust pelletizing system, the part as steel-making refining dedusting ash.
Due to the harmful element such as K, Na, Zn, Cl containing high level in steel-making refining dedusting ash, and its all iron content
Low, fine size, surface hydrophilicity is poor, it is limited by very large in recycling for steel industry.Patent
CN104310535B discloses the resource utilization method of a kind of blast furnace dedusting ash and removing dust of coke oven, comprises the following steps：1)
Screen out blast furnace dedusting ash and removing dust of coke oven that particle diameter is 150~400 mesh；2) blast furnace dedusting ash after screening and coke oven are removed
Dirt ash is 2~5 in mass ratio：1 is mixed, and is subsequently adding bentonite and ammonium salt solution, is granulated after stirring, gained
Grain diameter is 1.5~5.0mm；3) it is transferred in Muffle furnace after particle drying, with 12~18 DEG C/min in atmosphere of inert gases
Programming rate be warming up to 400~650 DEG C after be calcined 1~2h, sintering is obtained mixing dust removing ash particle；4) by mixing dust removing ash
In the outer draining of grain input coking biochemical, pH value is to 3~5 and is uniformly mixed for regulation, fully in the outer draining of degraded coking biochemical
Organic matter, complete advanced treating.The environmental pollution and occupation of land of blast furnace dedusting ash and removing dust of coke oven are not only solved the problems, such as,
The advanced treating of the outer draining of coking biochemical is realized, Treatment of Coking Effluent cost is reduced.It is logical using blast furnace and converter dust-removing ash
Cross the method that mixing granulation obtains the dedusting ash particle for the treatment of coking biochemical waste water.But its content is not directed to dedusting ash and directly neutralizes
The process of acid waste water.Patent CN1456517A is related to a kind of industrial acidic wastewater purifying treatment method and equipment.Inorganic agent can
It is nertralizer to use electric-melting magnesium dedusting ash, light-burning magnesium powder, using special design and the Process configuration of novelty, there is provided a kind of
Reduced investment, operating cost is low, and resource is wide, and reaction is abundant, high treating effect, compact conformation, the acid waste water purification of convenient management
Method and apparatus.Treatment pH value of waste water is up to 6-9, qualified discharge.The treatment of wastes with processes of wastes against one another is capable of achieving, non-renewable resources are protected.Place
Reason process produce the sinterable pelletizing of sludge, make construction material or exploitation make water treatment agent, realize the comprehensive utilization of three wastes resource.
Acid waste water after treatment can be used for production equipment cooling, wetland greening etc..Using in electric-melting magnesium dedusting ash and acid waste water
Method and device, its technology contents include supplying acid waste water to neutralizing tower；Nertralizer, nertralizer is supplied to use electric-melting magnesium in neutralizing tower
Dedusting ash, light-burning magnesium powder；Neutralization reaction；Filtering.Its content is not directed to the processes such as the recovery of Air Exposure, valuable element.
The content of the invention
It is an object of the invention to provide a kind of method for making steel refining dedusting ash comprehensive utilization.The present invention is using steel-making essence
Refining dedusting ash carrys out the cold rolling acid waste water of neutralisation treatment, is processed simultaneously steel-making refining dedusting ash and cold rolling acid waste water,
The treatment of wastes with processes of wastes against one another is realized, while recyclable steel-making refines the valuable elements such as Fe, Zn, Mn in dedusting ash and cold rolling acid waste water, it is real
The recycling of existing resource.
In order to solve the above technical problems, the present invention is adopted the following technical scheme that：
A kind of method for making steel refining dedusting ash comprehensive utilization, comprises the technical steps that：
(1) feed bin that refining dedusting ash sends into cold rolling acid waste water processing system will be made steel, antalkali is made emulsion
And save backup；
(2) cold rolling acid waste water is entered into regulating reservoir, carries out Air Exposure, waste water is obtained enough dissolved oxygens, by acid
Property waste water in ferrous ions into ferric ion, while preventing in pond suspension to sink, cause deposition pond in；
(3) water outlet in step (2) enters in one-level neutralization pond and continues to be aerated, while add steel-making refining dedusting ash will be useless
The pH value of water is adjusted to 7 or so, then adds antalkali, and waste water pH value is further controlled 9~9.5；
(3) water outlet in step (2) is entered in one-level neutralization pond, one-level neutralization pond by elevator pump and continues to be aerated, to ferrous iron
Ion is further aoxidized；Steel-making refining dedusting ash is added simultaneously adjust to 7 or so the pH value of waste water, then add alkalescence
And agent, waste water pH value is further controlled 9~9.5；
(4) water outlet processed by step (3) flow to two grades of neutralization ponds certainly, continues to be aerated, while adding antalkali
The pH value of waste water is adjusted to 9.5~10.0, and adds flocculant PAC, the visual subsequent sedimentation effect of dosage and effluent quality enter
Row regulation；
(5) water outlet processed by step (4) enters flocculation distributing trough, and the dosing coagulant PAM in the distributing trough that flocculates makes
Suspension in waste water further flocculates, settles, and the visual depositing reservoir effect of settling of dosage and effluent quality are adjusted；
(6) water outlet processed by step (5) enters depositing reservoir, and the sludge in waste water is pumped to after producing precipitation by spoil disposal
Sludge concentration tank, after concentrated reduction moisture content, delivers to filter press dehydration, mud cake is obtained, by after high temperature reduction PROCESS FOR TREATMENT
Obtain metallized pellet and zinc-rich dust；
(7) water outlet in step (6) enters neutralization pond, adds antalkali and watery hydrochloric acid, and the pH value of waste water is controlled
Between 6~9, the dosage of antalkali and watery hydrochloric acid is by depending on specific water quality situation；
(8) water outlet in step (7) enters filtered water reservoir, if processed water water quality can not be up to standard, to processed during discharge
Water carries out backflow reprocessing, then the suspension in processed water is further removed by filter.
Further, made steel in the method for described steel-making refining dedusting ash comprehensive utilization the TFe contents of refining dedusting ash >=
15%, CaO content >=25%, granularity is less than 45 μm, and moisture is less than 1%.
Further, the method neutral and alkali nertralizer of described steel-making refining dedusting ash comprehensive utilization is NaOH, carbonic acid
The composition of one or more in sodium and calcium hydroxide.
Further, the method high temperature reducing process of described steel-making refining dedusting ash comprehensive utilization for rotary hearth furnace high temperature also
Former or rotary kiln high temperature reduction.
Compared with prior art, the present invention at least has the advantages that：
Outstanding feature of the invention is steel-making is refined dedusting ash and cold rolling acid waste water while being processed, and solves ring
Problem on guarantor, realizes the treatment of wastes with processes of wastes against one another, while Fe, Zn, Mn in recyclable steel-making refining dedusting ash and cold rolling acid waste water
Deng valuable element, the recycling of resource is realized, economic benefit and environmental benefit with highly significant.
Brief description of the drawings
Fig. 1 is the process chart that steel-making refining dedusting ash processes cold rolling acid waste water.
Specific embodiment
The special technological process of the present invention is as shown in Figure 1.With reference to embodiment, the present invention is further illustrated.
As shown in table 1, granularity is less than 45 μm to the chemical composition of steel-making refining dedusting ash used in the present invention, and moisture is less than
1%.
The chemical composition (%) of the steel-making refining dedusting ash of table 1
| Raw material type | TFe | CaO | SiO2 | MgO | Al2O3 | Zn | Cl |
| Steel-making refining dedusting ash | ≥15 | ≥25 | 3-6 | 3-7 | 1-3 | 2-4 | 0.1-0.5 |
Embodiment 1
It is about 2.0~2.5 cold rolling acid waste water using the steel-making refining dedusting ash treatment pH value shown in table 1.Will steel-making
Refining dedusting ash sends into the feed bin of cold rolling acid waste water processing system, and antalkali is made emulsion and saves backup；Will be various
Cold rolling acid waste water enters regulating reservoir, carries out Air Exposure, water outlet by elevator pump enter in one-level neutralization pond, one-level neutralization pond after
Continuous aeration, is further aoxidized to ferrous ion, while adding the steel-making refining of the 0.15%~0.20% of waste water gross mass
Dedusting ash adjusts to 7.0 or so the pH value of waste water, then add waste water gross mass 0.01%~0.03% calcium hydroxide, will
Waste water pH value is further controlled 9~9.5；
Water outlet continues to be aerated, while add micro calcium hydroxide being adjusted to the pH value of waste water from two grades of neutralization ponds are flow to
9.5~10.0, and add the PAC flocculants of 2~4ppm of waste water gross mass；Two grades of neutralization chamber water outlets enter flocculation distributing trough,
The coagulant PAM of 3~5ppm of waste water gross mass is added in the distributing trough that flocculates, the suspension in waste water is further flocculated,
Sedimentation；Water outlet enters depositing reservoir, and sludge in waste water produces precipitation, and sludge concentration tank is pumped to by spoil disposal, sediment is concentrated,
After filter-press dehydration, the mud cake rich in Fe, Zn is obtained, high temperature reduction is carried out in 1000~1300 DEG C of temperature by rotary hearth furnace process,
Metallized pellet and zinc-rich dust are obtained, the valuable elements such as Fe, Zn are recycled.
The water outlet of depositing reservoir enters neutralization pond, adds antalkali and watery hydrochloric acid, and the pH value of waste water is controlled 6~9
Between；Water outlet enters back into filtered water reservoir, is discharged after water quality reaching standard, if water quality is not up to standard, backflow reprocessing is carried out to it, until
Outer row after qualified.
Embodiment 2
It is about 1.5~2.0 cold rolling acid waste water using the steel-making refining dedusting ash treatment pH value shown in table 1.Will steel-making
Refining dedusting ash sends into the feed bin of cold rolling acid waste water processing system, and antalkali is made emulsion and saves backup；Will be various
Cold rolling acid waste water enters regulating reservoir, carries out Air Exposure, water outlet by elevator pump enter in one-level neutralization pond, one-level neutralization pond after
Continuous aeration, is further aoxidized to ferrous ion, while the steel-making refining for adding the 0.20%~1.0% of waste water gross mass is removed
Dirt ash adjusts to 7.0 or so the pH value of waste water, then add waste water gross mass 0.01%~0.03% NaOH, will be useless
Water ph value is further controlled 9~9.5；
Water outlet continues to be aerated, while add micro calcium hydroxide being adjusted to the pH value of waste water from two grades of neutralization ponds are flow to
9.5~10.0, and add the PAC flocculants of 2~4ppm of waste water gross mass；Two grades of neutralization chamber water outlets enter flocculation distributing trough,
The coagulant PAM of 3~5ppm of waste water gross mass is added in the distributing trough that flocculates, the suspension in waste water is further flocculated,
Sedimentation；Water outlet enters depositing reservoir, and sludge in waste water produces precipitation, and sludge concentration tank is pumped to by spoil disposal, sediment is concentrated,
After filter-press dehydration, the mud cake rich in Fe, Zn is obtained, high temperature reduction is carried out in 1000~1300 DEG C of temperature by rotary kiln technology,
Metallized pellet and zinc-rich dust are obtained, the valuable elements such as Fe, Zn are recycled.
The water outlet of depositing reservoir enters neutralization pond, adds antalkali and watery hydrochloric acid, and the pH value of waste water is controlled 6~9
Between；Water outlet enters back into filtered water reservoir, is discharged after water quality reaching standard, if water quality is not up to standard, backflow reprocessing is carried out to it, until
Outer row after qualified.
Although embodiment of the present invention is disclosed as above, for those skilled in the art, can be easily real
Now other modification, therefore under the universal limited without departing substantially from claim and equivalency range, the present invention is not limited to
Specific details.
Claims (4)
1. it is a kind of to make steel the method that refining dedusting ash is comprehensively utilized, it is characterised in that to comprise the technical steps that：
(1) feed bin that refining dedusting ash sends into cold rolling acid waste water processing system will be made steel, antalkali is made emulsion and protects
Deposit standby；
(2) cold rolling acid waste water is entered into regulating reservoir, carries out Air Exposure；
(3) water outlet in step (2) enters in one-level neutralization pond and continues to be aerated, while adding steel-making refining dedusting ash by waste water
PH value is adjusted to 7, then adds antalkali, and waste water pH value is further controlled 9~9.5；
(4) water outlet processed by step (3) is aerated from two grades of neutralization ponds, continuation is flow to, while add antalkali will be useless
The pH value of water is adjusted to 9.5~10.0, and adds flocculant PAC；
(5) water outlet processed by step (4) enters flocculation distributing trough, the dosing coagulant PAM in the distributing trough that flocculates；
(6) water outlet processed by step (5) enters depositing reservoir, and the sludge in waste water is pumped to sludge after producing precipitation by spoil disposal
Concentration basin, after concentrated reduction moisture content, delivers to filter press dehydration, obtains mud cake, is obtained by after high temperature reduction PROCESS FOR TREATMENT
Metallized pellet and zinc-rich dust；
(7) water outlet in step (6) enters neutralization pond, adds antalkali and watery hydrochloric acid, by the control of the pH value of waste water 6~
Between 9；
(8) water outlet in step (7) enters filtered water reservoir, if processed water water quality can not be up to standard, processed water is entered during discharge
Row backflow reprocessing, then the suspension in processed water is further removed by filter.
2. the method that steel-making refining dedusting ash according to claim 1 is comprehensively utilized, its feature is that the steel-making is refined
TFe content >=15% of dedusting ash, CaO content >=25%, granularity is less than 45 μm, and moisture is less than 1%.
3. the method that steel-making refining dedusting ash according to claim 1 is comprehensively utilized, its feature is that the alkalescence is neutralized
Agent is NaOH or calcium hydroxide.
4. the method for steel-making refining dedusting ash comprehensive utilization according to claim 1, its feature is, the high temperature reduction
Technique is rotary hearth furnace high temperature reduction or rotary kiln high temperature reduction.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107473560A (en) * | 2017-09-29 | 2017-12-15 | 四川德胜集团钒钛有限公司 | A kind of sludge recovery and processing system |
| CN108726727A (en) * | 2018-06-08 | 2018-11-02 | 江苏省沙钢钢铁研究院有限公司 | The processing method of cold rolling acid waste water and the application for being sintered semi-dry desulphurization ash |
| CN108840430A (en) * | 2018-07-10 | 2018-11-20 | 天津工业大学 | A kind of electro-catalysis blast furnace dedusting ash reinforcing up-flow anaerobic sludge blanket system |
| CN113429030A (en) * | 2021-08-11 | 2021-09-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for cooperatively treating sintering desulfurization acid wastewater and machine head dedusting ash |
| CN114702188A (en) * | 2021-09-07 | 2022-07-05 | 中冶长天国际工程有限责任公司 | Method and system for co-processing high-salinity solid waste ash and acid wastewater of iron and steel plant |
| CN114850174A (en) * | 2022-05-09 | 2022-08-05 | 天俱时工程科技集团有限公司 | Coupling process for solid waste treatment and preparation of chain-looping pellets |
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