CN108070723A - A kind of method of incineration of refuse flyash, municipal sludge and the metallurgy sintered recycling of Ferrous Metallurgy dedusting ash - Google Patents

A kind of method of incineration of refuse flyash, municipal sludge and the metallurgy sintered recycling of Ferrous Metallurgy dedusting ash Download PDF

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Publication number
CN108070723A
CN108070723A CN201611004072.9A CN201611004072A CN108070723A CN 108070723 A CN108070723 A CN 108070723A CN 201611004072 A CN201611004072 A CN 201611004072A CN 108070723 A CN108070723 A CN 108070723A
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China
Prior art keywords
sintering
flying dust
sludge
mixed
mixture
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CN201611004072.9A
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Chinese (zh)
Inventor
叶恒棣
周志安
刘水石
王菊香
李康
代友训
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Zhongye Changtian International Engineering Co Ltd
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Zhongye Changtian International Engineering Co Ltd
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Priority to CN201611004072.9A priority Critical patent/CN108070723A/en
Publication of CN108070723A publication Critical patent/CN108070723A/en
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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00Working 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
    • C22B7/02Working-up flue dust
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00Preliminary treatment of ores or scrap
    • C22B1/14Agglomerating; Briquetting; Binding; Granulating
    • C22B1/16Sintering; Agglomerating
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00Preliminary treatment of ores or scrap
    • C22B1/14Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24Binding; Briquetting ; Granulating
    • C22B1/242Binding; Briquetting ; Granulating with binders
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00Working 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
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

Abstract

A kind of method of refuse incineration flying ash metallurgy sintering recycling, this method comprise the following steps:(A1) flying dust pre-treatment step:Incineration of refuse flyash and binding agent are uniformly mixed, obtain flying dust mixture;(B1) batching step:Obtained flying dust mixture with other raw materials is mixed, is uniformly mixed, obtains sinter mixture;(C) mixed pelletization step:Primary sinter mixture is obtained into sintering mixing material by mixer after one is mixed, two is mixed;(D) sintering step:The sintering mixing material is put into sintering pallet to be sintered.The present invention utilizes effective chemical composition in flying dust, municipal sludge, Ferrous Metallurgy dedusting ash to be used for metallurgy sintered, realization recycling.

Description

A kind of incineration of refuse flyash, municipal sludge and the metallurgy sintered money of Ferrous Metallurgy dedusting ash The method that source utilizes
Technical field
The present invention relates to utilization of waste as resource field more particularly to for a kind of incineration of refuse flyash, municipal sludge and The method of the metallurgy sintered recycling of Ferrous Metallurgy dedusting ash.Mainly solve incineration of refuse flyash, municipal sludge, Ferrous Metallurgy Dedusting ash does not dispose the environment brought and social concern properly.
Background technology
Flying dust is the inevitable outcome of waste incineration, accounts about the 3~5% of the amount of burning away the refuse.Flying dust is in gas cleaning system Thin particulate matter obtained by system is collected, the flying dust that including with Chemical treatment flue gas when generates, account for 10% in lime-ash~ 20%.Flying dust is generally in canescence or Dark grey, and grain size is less than 300 μm, and most of is 1.0 μm~30 μm, and moisture content 10%~ 23%, clinker ignition loss 34%~51%, easy frost heave, hardly possible compacting, particle shape is mostly in rodlike, polygonal matter shape, flocculence, spherical etc. Irregular shape.
At present, China developed area flying dust is mainly filled by transporting security landfill field after simply and easy treat to, not only greatly Amount occupies the storage capacity of security landfill field, and of high cost, generally 2000~3000 yuan/ton.And some are underdeveloped, do not have The area of Condition Construction security landfill field, it is general using the side for transporting refuse landfill landfill after stockpiling or simple cement curing to Formula, there is the hidden danger of secondary pollution.
Municipal sludge is the product during municipal sewage treatment, and a part is directly separated generation, another part by sewage It is generated in sewage disposal process.Municipal sewage treatment was quickly grown in recent years, and municipal sludge, which generates total amount, also quickly to be increased.Greatly Amount municipal sludge needs, by timely processing, to reduce sludge high-volume, avoid environmental pollution.In recent years, the dirt in national team city Mud problem is increasingly paid attention to, and the target for proposing specific resistance to filtration is to realize the minimizing of sludge, stabilisation and innoxious;It encourages Recycle and utilize the energy and resource in sludge.Adhere to realizing the processing disposal of sludge on the premise of safe and environment-friendly and economical And comprehensive utilization, achieve the purpose that energy-saving and emission-reduction and develop a circular economy.
Municipal sludge has moisture content high, and noxious pollutant content is high, the features such as being also easy to produce foul gas.Different disposal rank Section sludge has a different moisture content, wherein gravity concentration moisture percentage in sewage sludge about 98%, mechanical dehydration moisture percentage in sewage sludge about 80%, Free water in sludge can be removed by mechanical force, and unfree water is difficult mechanically further to remove.High-moisture-contensludge sludge It is more difficult during transporting and filling, and processing load of the garbage loading embeading factory to landfill leachate is increased, generally Moisture content in transport is asked to be not more than 40%.
Disposal, use aspects for municipal sludge, encourage recycling and using in sludge the energy, resource be following sludge An important content of development trend is handled, comparatively, in all sludge disposal technologies, high-temperature process is that current sludge subtracts Quantify, the suitable method of harmless treatment.At present, it is more using reporting for work for sludge using high-temperature treatment, such as using sludge as raw material Baking ceramsite, sludge brick processed, construction material and eco-cement etc., but have the drawback that Deal with Time is long, it is also easy to produce secondary dirt Dye, and disposal costs are higher, and the introducing of sludge does not help the performance raising of original material.
Ferrous Metallurgy dedusting ash is the substantial amounts of ion dust mud contaning that iron and steel enterprise generates in steel manufacture process, such as high tile This ash, blast furnace gas mud, sintering dust separation ash, converter OG sludge, steel scale of steel rolling etc..Iron and steel enterprise is to the utilization side of metallurgical dust sludge at present Formula mostly using sinter mixture is directly incorporated, has the drawback that:Dirt mud fine size, in transport, mixing and sintering process Easily generate secondary pollution;In sintering process, relatively thin and higher water content dirt mud, which will deteriorate, is sintered gas permeability, influences to be sintered Production and technical indication so that sinter quality is affected.
In this context, how to incineration of refuse flyash, municipal sludge, Ferrous Metallurgy dedusting ash carry out minimizing and Combine and carry out comprehensive utilization as certain problem.It needs further to develop new treatment process and carries out industrialization It is significant and imperative as the task of top priority.
The content of the invention
It is an object of the invention to provide the comprehensive utilizations of a kind of incineration of refuse flyash, municipal sludge and Ferrous Metallurgy dedusting ash Method.It mainly solves incineration of refuse flyash, municipal sludge, Ferrous Metallurgy dedusting ash and does not dispose the environment brought and society properly Problem.The present invention utilizes effective chemical composition in flying dust, municipal sludge, Ferrous Metallurgy dedusting ash to be used for metallurgy sintered, realization Recycling.
Main component in flying dust is CaO, SiO2, Na2O, SO3, K2O, Fe2O3, Al2O3, the quality point of MgO, wherein CaO Number highest, is 20.4%~37.9%, is secondly SO3, SiO2;Main harm substance is heavy metal (Zn, Pd, Cu, Cr, Cd, Ni With Hg etc., 3%) average content is both less than He bioxin;The mass fraction of chlorine is high in flying ash, reaches as high as 15%, wherein The ratio that solvable chlorine accounts for total chlorine is 40.6%~83.9%.
Municipal sludge difficulty in treatment is how to remove unfree water, this will bring difficulty to the transport and processing of sludge.
The characteristics of Ferrous Metallurgy dedusting ash is that iron-holder is higher, and dirt mud pellet degree is thinner, and water content is higher.Iron-holder is high, Available for the supplying of iron material, but fine size and the high needs of moisture are handled.
In this application, " optional " represent to be with or without." optionally " represent carry out or without.
The first embodiment provided according to the present invention provides a kind of refuse incineration flying ash metallurgy sintering recycling Method.
A kind of method of refuse incineration flying ash metallurgy sintering recycling, this method comprise the following steps:
(A1) flying dust pre-treatment step:Incineration of refuse flyash and binding agent are uniformly mixed, obtain flying dust mixture;
(B1) batching step:Obtained flying dust mixture with raw materials for sintering is mixed, obtains primary sintered compound Material, wherein raw materials for sintering includes iron-bearing material, flux and the fuel of sintering;
(C) mixed pelletization step:Sinter mixture is mixed into (that is, one is mixed) and optional second by first time mixer Secondary mixer mixing (that is, two is mixed) obtains granular or pellet sintering mixing material;
(D) sintering step:The sintering mixing material is put into sintering pallet to be sintered.
Preferably, this method further includes:(E) exhausting step:Exhaust fan will be sintered through the bellows under sintering pallet and produce Raw flue gas is taken away.
Preferably, this method further includes:(F) dust removal step:Flue gas is passed through electric precipitator dedusting by exhaust fan.
In the present invention, the binding agent is organic binder bond, bentonite, activated alumina, iron oxide, sodium carbonate, carbon One or more of sour potassium, sodium metasilicate or fluorite.
It is preferred that raw materials for sintering includes the iron-bearing material (such as iron ore powder) of 59-70wt%, 22-32wt% flux (such as swellings Soil), 4-10% (preferably 5-8%) fuel (such as coal dust), total weight of the weight ratio based on raw materials for sintering.
It is preferred that in step (A1), the mixed proportion of incineration of refuse flyash and binding agent is 80-99.8:0.2-20, it is more excellent Select 90-99.8:0.2-10, more preferable 95-99.8:0.2-5, such as 97.5-99.8:0.2-2.5.
It is preferred that the dosage of flying dust mixture is 0.3-5wt% in step (B1), preferably 0.31-3wt%, more preferably 0.32-2wt%, more preferably 0.33-1wt%, (i.e. whole dispensings is total for total weight of the weight percent based on sintered material The total weight of weight or primary sinter mixture, including flying dust mixture and raw materials for sintering).
In the present invention, with the progress of sintering process, bioxin is degraded in flying dust;CaO in flying dust simultaneously High-content also contributes to be sintered, and CaO can react with the mineral of other in sintering feed, generates new compound, is formed main Binder Phase calcium ferrite improves the basicity of sinter, the feature that high basicity sinter had not only had FeO low, Well-recovered, but also has The high feature of intensity improves the quality of sinter.
Second of the embodiment provided according to the present invention, provides a kind of incineration of refuse flyash and Ferrous Metallurgy dedusting ash is comprehensive Close the method utilized.
A kind of incineration of refuse flyash and the method for Ferrous Metallurgy dedusting ash comprehensive utilization, this method comprise the following steps:
(A1) flying dust pre-treatment step:Incineration of refuse flyash and binding agent are uniformly mixed, obtain flying dust mixture;
(A201) flying dust and Ferrous Metallurgy dedusting ash blend step:Steel is added in the flying dust mixture obtained in step (A1) Gained mixture is mixed and (mixed after preferably, adding in water, the additive amount of water is wetting by iron metallurgy dedusting ash Amount;More preferably, the amount of water is added in so that water content is in the mixture formed by flying dust mixture with Ferrous Metallurgy dedusting ash 4-12wt%, more preferable water content are 5-10wt%), obtain flying dust and Ferrous Metallurgy dedusting ash mixture;
(B2) batching step:Obtained flying dust and Ferrous Metallurgy dedusting ash mixture are mixed with raw materials for sintering, Sinter mixture is obtained, wherein raw materials for sintering includes iron-bearing material, flux and the fuel of sintering;
(C) mixed pelletization step:By primary sinter mixture by first time mixer mixing (that is, one is mixed) and optionally Second of mixer mixing (that is, two is mixed) obtains granular or pellet sintering mixing material;
(D) sintering step:The sintering mixing material is put into sintering pallet to be sintered.
Preferably, this method further includes:(E) exhausting step:Exhaust fan will be sintered through the bellows under sintering pallet and produce Raw flue gas is taken away.
Preferably, this method further includes:(F) dust removal step:Flue gas is passed through electric precipitator dedusting by exhaust fan.
In the present invention, the binding agent is organic binder bond, bentonite, activated alumina, iron oxide, sodium carbonate, carbon One or more of sour potassium, sodium metasilicate or fluorite.
It is preferred that raw materials for sintering includes the iron-bearing material (such as iron ore powder) of 59-70wt%, 22-32wt% flux (such as swellings Soil), 4-10% (preferably 5-8%) fuel (such as coal dust), total weight of the weight ratio based on raw materials for sintering.
It is preferred that in step (A1), the mixed proportion of incineration of refuse flyash and binding agent is 80-99.8:0.2-20, it is more excellent Select 90-99.8:0.2-10, more preferable 95-99.8:0.2-5, such as 97.5-99.8:0.2-2.5.
It is preferred that in step (A201), the weight ratio of flying dust mixture and Ferrous Metallurgy dedusting ash is 1:1.2-6, preferably 1:1.5-5 more preferably 1:2-4;Preferably, the amount of water is added in so that being formed by flying dust mixture and Ferrous Metallurgy dedusting ash Mixture in water content be 4-12wt%, more preferable water content be 5-10wt%.
It is preferred that in step (B2), the dosage of flying dust and Ferrous Metallurgy dedusting ash mixture is 1-10wt%, preferably 1.5- 8wt%, more preferable 1.8-7wt%, more preferably more preferable 2-6wt%, more preferable 2.5-5.5wt%, 3-5wt%, the weight Total weight (the i.e. whole total weights of dispensing or the total weight of sinter mixture, including flying dust, steel of the percentage based on sintered material Iron metallurgy dedusting ash mixture and raw materials for sintering).
In the present invention, obtained flying dust mixture and Ferrous Metallurgy dedusting ash in granulator are mixed, consumed Fall the moisture in Ferrous Metallurgy dedusting ash, while new water can be suitably added, CaO in flying dust also has been carried out digestion obtains niter Ash.
In the present invention, Ferrous Metallurgy dedusting ash iron-holder height reduces the dosage of former iron ore, flying dust to a certain extent In high calcium content reduce the dosage of flux to a certain extent.
In the present invention, with the progress of sintering process, bioxin is degraded in flying dust;Calcium hydroxide in flying dust is high Content also contributes to be sintered, and improves the basicity of sinter, the feature that high basicity sinter had not only had FeO low, Well-recovered, but also With the high feature of intensity, the quality of sinter is improved.Ferrous Metallurgy dedusting ash avoids thin after the preliminary granulation with flying dust Poor air permeability caused by powder sintering, while its higher iron content, it helps sintering also improves the quality of sinter.
The third embodiment provided according to the present invention, provides a kind of incineration of refuse flyash and municipal sludge is metallurgy sintered The method of recycling.
A kind of method of incineration of refuse flyash and the metallurgy sintered recycling of municipal sludge, this method include following step Suddenly:
(A1) flying dust pre-treatment step:Incineration of refuse flyash and binding agent are uniformly mixed, obtain flying dust mixture;
(A3) municipal sludge pre-treatment step:It will be directly separated through municipal sewage in the sludge or sewage disposal process of generation The sludge of generation is dehydrated, and is pre-processed the sludge after (or dehydration);
(A301) flying dust and municipal sludge blend step:By by pretreatment municipal sludge (i.e. dewatered sludge) and Flying dust is mixed, and then optionally adds in or be added without quick lime in mixing, obtains sludge and flying dust mixture;
(B3) batching step:Obtained sludge and flying dust mixture with raw materials for sintering are mixed, it is mixed to obtain sintering Material is closed, wherein raw materials for sintering includes iron-bearing material, flux and the fuel of sintering;
(C) mixed pelletization step:By primary sinter mixture by first time mixer mixing (that is, one is mixed) and optionally Second of mixer mixing (that is, two is mixed) obtains granular or pellet sintering mixing material;
(D) sintering step:The sintering mixing material is put into sintering pallet to be sintered.
In this application, " optionally " represent carry out or without, such as represent addition or do not add.
Preferably, this method further includes:(E) exhausting step:Exhaust fan will be sintered through the bellows under sintering pallet and produce Raw flue gas is taken away.
Preferably, this method further includes:(F) dust removal step:Flue gas is passed through electric precipitator dedusting by exhaust fan.
In the present invention, the binding agent is organic binder bond, bentonite, activated alumina, iron oxide, sodium carbonate, carbon One or more of sour potassium, sodium metasilicate or fluorite.
In the present invention, sludge dewatering uses mechanical dehydration in step (A3), is more preferably taken off using press filtration or centrifugation Water.
It is preferred that raw materials for sintering includes the iron-bearing material (such as iron ore powder) of 59-70wt%, 22-32wt% flux (such as swellings Soil), 4-10% (preferably 5-8%) fuel (such as coal dust), total weight of the weight ratio based on raw materials for sintering.
It is preferred that in step (A1), the mixed proportion of incineration of refuse flyash and binding agent is 80-99.8:0.2-20, it is more excellent Select 90-99.8:0.2-10, more preferable 95-99.8:0.2-5, such as 97.5-99.8:0.2-2.5.
It is preferred that in step (A301), the weight ratio of municipal sludge and flying dust after pretreatment (or by dehydration) is 1: 0.5-5 is preferably 1:0.8-4.5 is preferably 1:1.2-4 it is preferably 1:1.5-3.5 more preferably 1:2-3;Preferably, when When adding quick lime, the weight ratio of quick lime and the sludge after pretreatment (or by dehydration) is 1:1.5-4.5 it is preferably 1: 1.7-4 more preferably 1:2-3.
It is preferred that the dosage of sludge and flying dust mixture is 2-18wt% in step (B3), preferably 3-16wt% is more excellent 3.5-15wt%, more preferable 4-14wt%, more preferable 4.5-12wt% are selected, more preferably 5-10wt%, the weight percent base In the total weight (total weight of i.e. whole dispensings, including sludge, flying dust mixture and raw materials for sintering) of sintered material.
Sludge dewatering uses mechanical dehydration in step (A3), is more preferably dehydrated using press filtration or centrifugation.
In the present invention, the CaO in flying dust, the water reaction generation calcium hydroxide in the quick lime and sludge that additionally add, instead The heat that should be generated is but also partial moisture evaporation, significantly reduces moisture percentage in sewage sludge.In addition, the quick lime additionally added can also be effective The pathogenic microorganisms in sludge is killed, reduces the secondary pollution to environment.
In the present invention, sludge and flying dust mixture contain substantial amounts of calcium hydroxide, can as raw materials for sintering flux it is auxiliary Help part.
In the present invention, with the progress of sintering process, bioxin is degraded in flying dust;Sludge and flying dust mixture The high-content of medium-slaking lime also contributes to be sintered, and improves the basicity of sinter, and high basicity sinter had both had that FeO is low, reduction Property good feature, and with the high feature of intensity, improve the quality of sinter.Contain on a small quantity organic in municipal sludge simultaneously Matter and cellulose in sintering, can provide certain combustion heat, assisted sintering as fuel.
The 4th kind of embodiment provided according to the present invention, provides a kind of incineration of refuse flyash, municipal sludge and steel smelting The method of golden dedusting ash comprehensive utilization.
A kind of incineration of refuse flyash, municipal sludge and Ferrous Metallurgy dedusting ash comprehensive utilization method, this method include with Lower step:
(A1) flying dust pre-treatment step:Incineration of refuse flyash and binding agent are uniformly mixed, obtain flying dust mixture;
(A3) municipal sludge pre-treatment step:It will be directly separated through municipal sewage in the sludge or sewage disposal process of generation The sludge of generation is dehydrated, and is pre-processed the sludge after (or dehydration);
(A401) flying dust, Ferrous Metallurgy dedusting ash and municipal sludge blend step:By the municipal sludge by pretreatment (i.e. Dewatered sludge) and flying dust, Ferrous Metallurgy dedusting ash mixed, then optionally add in or be added without raw stone in mixing Ash obtains sludge, Ferrous Metallurgy dedusting ash and flying dust mixture;
(A402) preliminary granulation step:By obtained sludge, Ferrous Metallurgy dedusting ash and flying dust mixture in granulator It is mixed, while adds in water, tentatively pelletized, obtain sludge, Ferrous Metallurgy dedusting ash and flying dust mangcorn;
(B4) batching step:Obtained sludge, Ferrous Metallurgy dedusting ash and flying dust mangcorn and raw materials for sintering are blended in Together, sinter mixture is obtained, wherein raw materials for sintering includes iron-bearing material, flux and the fuel of sintering;
(C) mixed pelletization step:By primary sinter mixture by first time mixer mixing (that is, one is mixed) and optionally Second of mixer mixing (that is, two is mixed) obtains granular or pellet sintering mixing material;
(D) sintering step:The sintering mixing material is put into sintering pallet to be sintered.
Preferably, this method further includes:(E) exhausting step:Exhaust fan will be sintered through the bellows under sintering pallet and produce Raw flue gas is taken away.
Preferably, this method further includes:(F) dust removal step:Flue gas is passed through electric precipitator dedusting by exhaust fan.
In the present invention, the binding agent is organic binder bond, bentonite, activated alumina, iron oxide, sodium carbonate, carbon One or more of sour potassium, sodium metasilicate or fluorite.
In the present invention, sludge dewatering uses mechanical dehydration in step (A3), is more preferably taken off using press filtration or centrifugation Water.
It is preferred that raw materials for sintering includes the iron-bearing material (such as iron ore powder) of 59-70wt%, 22-32wt% flux (such as swellings Soil), 4-10% (preferably 5-8%) fuel (such as coal dust), total weight of the weight ratio based on raw materials for sintering.
It is preferred that in step (A1), the mixed proportion of incineration of refuse flyash and binding agent is 80-99.8:0.2-20, it is more excellent Select 90-99.8:0.2-10, more preferable 95-99.8:0.2-5, such as 97.5-99.8:0.2-2.5.
It is preferred that in step (A401), the weight ratio of municipal sludge, flying dust and Ferrous Metallurgy dedusting ash three is 1:1.3-4: 3-18, preferably 1:1.7-3.5:3.5-15 more preferable 1:2-3:4-10;Preferably, quick lime and pretreatment are (or by de- Water) after sludge weight ratio be 1:1.5-4.5 it is preferably 1:1.7-4 more preferably 1:2-3.
It is preferred that in step (A402), the amount of water is added in so that being formed by sludge, Ferrous Metallurgy dedusting ash and flying dust mixture Mixture in water content be 4-12wt%, more preferable water content be 5-10wt%.
It is preferred that in step (B4), the dosage of sludge, Ferrous Metallurgy dedusting ash and flying dust mangcorn is 3-27wt%, preferably It is 4-25wt%, more preferable 5-24wt%, more preferable 6-22wt%, more preferable 7-20wt%, more preferably 8-18wt%, this is heavy Measure the total weight (total weight of i.e. whole dispensings, including sludge, Ferrous Metallurgy dedusting ash, flying dust of the percentage based on sintered material Mangcorn and raw materials for sintering).
Sludge dewatering uses mechanical dehydration in step (A3), is more preferably dehydrated using press filtration or centrifugation.
In the present invention, the municipal sludge by pretreatment and flying dust, also Ferrous Metallurgy dedusting ash are mixed, by All contain moisture in municipal sludge and Ferrous Metallurgy dedusting ash, so being suitably added quick lime again in mixed process, obtain city City's sludge, flying dust and Ferrous Metallurgy dedusting ash mixture.CaO in flying dust, the quick lime additionally added and sludge and steel smelting Water reaction generation calcium hydroxide in golden dedusting ash, is equivalent to quicklime slaking process.In addition, the quick lime additionally added can also have Effect kills the pathogenic microorganisms in sludge, reduces the secondary pollution to environment.
In the present invention, obtained municipal sludge, flying dust and Ferrous Metallurgy dedusting ash mixture are carried out in granulator Mixing, while new water can be suitably added, indigested CaO in mixture also has been carried out digestion obtains calcium hydroxide
In the present invention, with the progress of sintering process, bioxin is degraded in flying dust;Municipal sludge, flying dust and It also contributes to be sintered containing substantial amounts of calcium hydroxide in Ferrous Metallurgy dedusting ash mixture, improves the basicity of sinter, high alkalinity The feature that sinter had not only had FeO low, Well-recovered, but also the feature for having intensity high improve the quality of sinter.City simultaneously Containing a small amount of organic matter and cellulose in city's sludge, in sintering, certain combustion heat can be provided as fuel, auxiliary is burnt Knot.Ferrous Metallurgy dedusting ash avoids poor air permeability caused by fine powder sintering after the preliminary granulation with flying dust, municipal sludge, Its higher iron content simultaneously, it helps sintering.
In the present invention, big exhaust fan is taken away through the bellows under sintering pallet by the flue gas generated is sintered, the flue gas bag Include chlorion in flying dust.
In the present invention, flue gas is pumped into electric precipitator by big exhaust fan, and flue-gas temperature reduces in electric precipitator, is flown The villaumite that ash volatilizes is condensate in flue dust, which collects through electric precipitator, realizes the enrichment of chlorion in flying dust With the minimizing of incineration of refuse flyash.
Generally, in this application, a small amount of water can be added in one is mixed and/or two is mixed, to promote to pelletize.
In the present invention, it is preferred to raw materials for sintering includes iron-bearing material (such as iron ore powder), the 22-32wt% of 59-70wt% Flux (such as bentonite), 4-10% (preferably 5-8%) fuel (such as anchracite duff), gross weight of the weight ratio based on raw materials for sintering Amount.
Compared with prior art, the present invention has following advantageous effects:
1st, incineration of refuse flyash, municipal sludge are solved, Ferrous Metallurgy dedusting ash difficulty puts the environment brought and society is asked Topic.
2nd, using flying dust, municipal sludge, the effective chemical composition of Ferrous Metallurgy dedusting ash for metallurgy sintered, realization flying dust Recycling.
3rd, the cost of raw materials for sintering is reduced, also reduces metallurgical fixed-end forces cost.
4th, metallurgy sintered technique disposal flying dust realizes efficient, high added value collaboration municipal sludge, Ferrous Metallurgy dedusting ash Disposal.
5th, do not change the original operating parameter of metallurgy sintered technique, obtain sintering process disposal flying dust, municipal sludge, steel smelting The universality of golden dedusting ash on the premise of metallurgy sintered ore deposit performance indicator is not reduced, realizes incineration of refuse flyash, city dirt Mud, Ferrous Metallurgy dedusting ash sintering cooperative disposal process environmental requirement and dispose at high proportion.
Description of the drawings
Fig. 1 is the process flow chart for the method that refuse incineration flying ash metallurgy of the present invention is sintered recycling;
Fig. 2 is the process flow chart of the method for incineration of refuse flyash of the present invention and the comprehensive utilization of Ferrous Metallurgy dedusting ash;
Fig. 3 is the technological process of the method for incineration of refuse flyash of the present invention and the metallurgy sintered recycling of municipal sludge Figure;
Fig. 4 is the technique of the method for incineration of refuse flyash of the present invention, municipal sludge and the comprehensive utilization of Ferrous Metallurgy dedusting ash Flow chart.
Specific embodiment
The first embodiment provided according to the present invention provides a kind of refuse incineration flying ash metallurgy sintering recycling Method.
A kind of method of refuse incineration flying ash metallurgy sintering recycling, this method comprise the following steps:
(A1) flying dust pre-treatment step:Incineration of refuse flyash and binding agent are uniformly mixed, obtain flying dust mixture;
(B1) batching step:Obtained flying dust mixture with raw materials for sintering is mixed, obtains primary sintered compound Material, wherein raw materials for sintering includes iron-bearing material, flux and the fuel of sintering;
(C) mixed pelletization step:Sinter mixture is mixed into (that is, one is mixed) and optional second by first time mixer Secondary mixer mixing (that is, two is mixed) obtains granular or pellet sintering mixing material;
(D) sintering step:The sintering mixing material is put into sintering pallet to be sintered.
Preferably, this method further includes:(E) exhausting step:Exhaust fan will be sintered through the bellows under sintering pallet and produce Raw flue gas is taken away.
Preferably, this method further includes:(F) dust removal step:Flue gas is passed through electric precipitator dedusting by exhaust fan.
In the present invention, the binding agent is organic binder bond, bentonite, activated alumina, iron oxide, sodium carbonate, carbon One or more of sour potassium, sodium metasilicate or fluorite.
It is preferred that raw materials for sintering includes the iron-bearing material (such as iron ore powder) of 59-70wt%, 22-32wt% flux (such as swellings Soil), 4-10% (preferably 5-8%) fuel (such as coal dust), total weight of the weight ratio based on raw materials for sintering.
It is preferred that in step (A1), the mixed proportion of incineration of refuse flyash and binding agent is 80-99.8:0.2-20, it is more excellent Select 90-99.8:0.2-10, more preferable 95-99.8:0.2-5, such as 97.5-99.8:0.2-2.5.
It is preferred that the dosage of flying dust mixture is 0.3-5wt% in step (B1), preferably 0.31-3wt%, more preferably 0.32-2wt%, more preferably 0.33-1wt%, (i.e. whole dispensings is total for total weight of the weight percent based on sintered material The total weight of weight or primary sinter mixture).
Second of the embodiment provided according to the present invention, provides a kind of incineration of refuse flyash and Ferrous Metallurgy dedusting ash is comprehensive Close the method utilized.
A kind of incineration of refuse flyash and the method for Ferrous Metallurgy dedusting ash comprehensive utilization, this method comprise the following steps:
(A1) flying dust pre-treatment step:Incineration of refuse flyash and binding agent are uniformly mixed, obtain flying dust mixture;
(A201) flying dust and Ferrous Metallurgy dedusting ash blend step:Steel is added in the flying dust mixture obtained in step (A1) Gained mixture is mixed and (mixed after preferably, adding in water, the additive amount of water is wetting by iron metallurgy dedusting ash Amount;More preferably, the amount of water is added in so that water content is in the mixture formed by flying dust mixture with Ferrous Metallurgy dedusting ash 4-12wt%, more preferable water content are 5-10wt%), obtain flying dust and Ferrous Metallurgy dedusting ash mixture;
(B2) batching step:Obtained flying dust and Ferrous Metallurgy dedusting ash mixture are mixed with raw materials for sintering, Sinter mixture is obtained, wherein raw materials for sintering includes iron-bearing material, flux and the fuel of sintering;
(C) mixed pelletization step:By primary sinter mixture by first time mixer mixing (that is, one is mixed) and optionally Second of mixer mixing (that is, two is mixed) obtains granular or pellet sintering mixing material;
(D) sintering step:The sintering mixing material is put into sintering pallet to be sintered.
Preferably, this method further includes:(E) exhausting step:Exhaust fan will be sintered through the bellows under sintering pallet and produce Raw flue gas is taken away.
Preferably, this method further includes:(F) dust removal step:Flue gas is passed through electric precipitator dedusting by exhaust fan.
In the present invention, the binding agent is organic binder bond, bentonite, activated alumina, iron oxide, sodium carbonate, carbon One or more of sour potassium, sodium metasilicate or fluorite.
It is preferred that raw materials for sintering includes the iron-bearing material (such as iron ore powder) of 59-70wt%, 22-32wt% flux (such as swellings Soil), 4-10% (preferably 5-8%) fuel (such as coal dust), total weight of the weight ratio based on raw materials for sintering.
It is preferred that in step (A1), the mixed proportion of incineration of refuse flyash and binding agent is 80-99.8:0.2-20, it is more excellent Select 90-99.8:0.2-10, more preferable 95-99.8:0.2-5, such as 97.5-99.8:0.2-2.5.
It is preferred that in step (A201), the weight ratio of flying dust mixture and Ferrous Metallurgy dedusting ash is 1:1.2-6, preferably 1:1.5-5 more preferably 1:2-4;Preferably, the amount of water is added in so that being formed by flying dust mixture and Ferrous Metallurgy dedusting ash Mixture in water content be 4-12wt%, more preferable water content be 5-10wt%.
It is preferred that in step (B2), the dosage of flying dust and Ferrous Metallurgy dedusting ash mixture is 1-10wt%, preferably 1.5- 8wt%, more preferable 1.8-7wt%, more preferably more preferable 2-6wt%, more preferable 2.5-5.5wt%, 3-5wt%, the weight Total weight (the i.e. whole total weights of dispensing or the total weight of sinter mixture) of the percentage based on sintered material.
The third embodiment provided according to the present invention, provides a kind of incineration of refuse flyash and municipal sludge is metallurgy sintered The method of recycling.
A kind of method of incineration of refuse flyash and the metallurgy sintered recycling of municipal sludge, this method include following step Suddenly:
(A1) flying dust pre-treatment step:Incineration of refuse flyash and binding agent are uniformly mixed, obtain flying dust mixture;
(A3) municipal sludge pre-treatment step:It will be directly separated through municipal sewage in the sludge or sewage disposal process of generation The sludge of generation is dehydrated, and is pre-processed the sludge after (or dehydration);
(A301) flying dust and municipal sludge blend step:By by pretreatment municipal sludge (i.e. dewatered sludge) and Flying dust is mixed, and then optionally adds in or be added without quick lime in mixing, obtains sludge and flying dust mixture;
(B3) batching step:Obtained sludge and flying dust mixture with raw materials for sintering are mixed, it is mixed to obtain sintering Material is closed, wherein raw materials for sintering includes iron-bearing material, flux and the fuel of sintering;
(C) mixed pelletization step:By primary sinter mixture by first time mixer mixing (that is, one is mixed) and optionally Second of mixer mixing (that is, two is mixed) obtains granular or pellet sintering mixing material;
(D) sintering step:The sintering mixing material is put into sintering pallet to be sintered.
In this application, " optionally " represent carry out or without, such as represent addition or do not add.
Preferably, this method further includes:(E) exhausting step:Exhaust fan will be sintered through the bellows under sintering pallet and produce Raw flue gas is taken away.
Preferably, this method further includes:(F) dust removal step:Flue gas is passed through electric precipitator dedusting by exhaust fan.
In the present invention, the binding agent is organic binder bond, bentonite, activated alumina, iron oxide, sodium carbonate, carbon One or more of sour potassium, sodium metasilicate or fluorite.
In the present invention, sludge dewatering uses mechanical dehydration in step (A3), is more preferably taken off using press filtration or centrifugation Water.
It is preferred that raw materials for sintering includes the iron-bearing material (such as iron ore powder) of 59-70wt%, 22-32wt% flux (such as swellings Soil), 4-10% (preferably 5-8%) fuel (such as coal dust), total weight of the weight ratio based on raw materials for sintering.
It is preferred that in step (A1), the mixed proportion of incineration of refuse flyash and binding agent is 80-99.8:0.2-20, it is more excellent Select 90-99.8:0.2-10, more preferable 95-99.8:0.2-5, such as 97.5-99.8:0.2-2.5.
It is preferred that in step (A301), the weight ratio of municipal sludge and flying dust after pretreatment (or by dehydration) is 1: 0.5-5 is preferably 1:0.8-4.5 is preferably 1:1.2-4 it is preferably 1:1.5-3.5 more preferably 1:2-3;Preferably, when When adding quick lime, the weight ratio of quick lime and the sludge after pretreatment (or by dehydration) is 1:1.5-4.5 it is preferably 1: 1.7-4 more preferably 1:2-3.
It is preferred that the dosage of sludge and flying dust mixture is 2-18wt% in step (B3), preferably 3-16wt% is more excellent 3.5-15wt%, more preferable 4-14wt%, more preferable 4.5-12wt% are selected, more preferably 5-10wt%, the weight percent base In the total weight (total weights of i.e. whole dispensings) of sintered material.
Sludge dewatering uses mechanical dehydration in step (A3), is more preferably dehydrated using press filtration or centrifugation.
The 4th kind of embodiment provided according to the present invention, provides a kind of incineration of refuse flyash, municipal sludge and steel smelting The method of golden dedusting ash comprehensive utilization.
A kind of incineration of refuse flyash, municipal sludge and Ferrous Metallurgy dedusting ash comprehensive utilization method, this method include with Lower step:
(A1) flying dust pre-treatment step:Incineration of refuse flyash and binding agent are uniformly mixed, obtain flying dust mixture;
(A3) municipal sludge pre-treatment step:It will be directly separated through municipal sewage in the sludge or sewage disposal process of generation The sludge of generation is dehydrated, and is pre-processed the sludge after (or dehydration);
(A401) flying dust, Ferrous Metallurgy dedusting ash and municipal sludge blend step:By the municipal sludge by pretreatment (i.e. Dewatered sludge) and flying dust, Ferrous Metallurgy dedusting ash mixed, then optionally add in or be added without raw stone in mixing Ash obtains sludge, Ferrous Metallurgy dedusting ash and flying dust mixture;
(A402) preliminary granulation step:By obtained sludge, Ferrous Metallurgy dedusting ash and flying dust mixture in granulator It is mixed, while adds in water, tentatively pelletized, obtain sludge, Ferrous Metallurgy dedusting ash and flying dust mangcorn;
(B4) batching step:Obtained sludge, Ferrous Metallurgy dedusting ash and flying dust mangcorn and raw materials for sintering are blended in Together, sinter mixture is obtained, wherein raw materials for sintering includes iron-bearing material, flux and the fuel of sintering;
(C) mixed pelletization step:By primary sinter mixture by first time mixer mixing (that is, one is mixed) and optionally Second of mixer mixing (that is, two is mixed) obtains granular or pellet sintering mixing material;
(D) sintering step:The sintering mixing material is put into sintering pallet to be sintered.
Preferably, this method further includes:(E) exhausting step:Exhaust fan will be sintered through the bellows under sintering pallet and produce Raw flue gas is taken away.
Preferably, this method further includes:(F) dust removal step:Flue gas is passed through electric precipitator dedusting by exhaust fan.
In the present invention, the binding agent is organic binder bond, bentonite, activated alumina, iron oxide, sodium carbonate, carbon One or more of sour potassium, sodium metasilicate or fluorite.
In the present invention, sludge dewatering uses mechanical dehydration in step (A3), is more preferably taken off using press filtration or centrifugation Water.
It is preferred that raw materials for sintering includes the iron-bearing material (such as iron ore powder) of 59-70wt%, 22-32wt% flux (such as swellings Soil), 4-10% (preferably 5-8%) fuel (such as coal dust), total weight of the weight ratio based on raw materials for sintering.
It is preferred that in step (A1), the mixed proportion of incineration of refuse flyash and binding agent is 80-99.8:0.2-20, it is more excellent Select 90-99.8:0.2-10, more preferable 95-99.8:0.2-5, such as 97.5-99.8:0.2-2.5.
It is preferred that in step (A401), the weight ratio of municipal sludge, flying dust and Ferrous Metallurgy dedusting ash three is 1:1.3-4: 3-18, preferably 1:1.7-3.5:3.5-15 more preferable 1:2-3:4-10;Preferably, quick lime and pretreatment are (or by de- Water) after sludge weight ratio be 1:1.5-4.5 it is preferably 1:1.7-4 more preferably 1:2-3.
It is preferred that in step (A402), the amount of water is added in so that being formed by sludge, Ferrous Metallurgy dedusting ash and flying dust mixture Mixture in water content be 4-12wt%, more preferable water content be 5-10wt%.
It is preferred that in step (B4), the dosage of sludge, Ferrous Metallurgy dedusting ash and flying dust mangcorn is 3-27wt%, preferably It is 4-25wt%, more preferable 5-24wt%, more preferable 6-22wt%, more preferable 7-20wt%, more preferably 8-18wt%, this is heavy Measure total weight (total weights of i.e. whole dispensings) of the percentage based on sintered material.
Sludge dewatering uses mechanical dehydration in step (A3), is more preferably dehydrated using press filtration or centrifugation.
Generally, in this application, a small amount of water can be added in one is mixed and/or two is mixed, to promote to pelletize.
Comparative example 1 (sintering method of the prior art)
In the present embodiment, raw materials for sintering includes:Iron-bearing material (70wt%), flux (dolomite and lime stone, 1:1 weight Measure ratio) (20wt%), fuel (coke powder) (9wt%), dedusting ash (1wt%).Total weight of the weight ratio based on raw materials for sintering. Sintering process comprises the following steps:
(1) raw materials for sintering mixes (that is, one is mixed) by first time mixer and second of mixer mixes (that is, two is mixed) and obtain To granular or pellet sintering mixing material;
(2) sintering step:The sintering mixing material is put into sintering pallet to be sintered;
(3) detecting step:In detecting step (2) after oversintering sinter quality.
The quality index of product sinter:Iron content 60wt%, ferrous oxide content 22wt%, sulfur content 0.08wt%, Basicity 10.03wt%, residual carbon content 0.4wt%, the tumbler index 78.00 of hot ore deposit, the tumbler index 78.00 of cold ore deposit;Cold ore deposit Screening index≤10.00.
Embodiment 1
A kind of method of refuse incineration flying ash metallurgy sintering recycling, this method comprise the following steps:
(A1) flying dust pre-treatment step:It is uniformly mixed, obtains using incineration of refuse flyash and as the bentonite of binding agent To flying dust mixture;Wherein:The mixed proportion of incineration of refuse flyash and binding agent is 4:1 (weight ratio);
(B1) batching step:The obtained flying dust mixture of 6 parts by weight and the raw materials for sintering of 194 parts by weight are blended in Together, primary sinter mixture is obtained, it is (white to include the 67wt% iron ore powders of sintering, 26wt% flux for wherein raw materials for sintering Marble and lime stone 1:1 weight ratio) and 7wt% anchracite duffs;Wherein:The dosage of flying dust mixture is 3wt%, the weight percent Than the total weight based on sintered material;
(C) mixed pelletization step:Sinter mixture is mixed into (that is, one is mixed) by first time mixer and is mixed for second Machine mixing (that is, two is mixed) obtains granular or pellet sintering mixing material;
(D) sintering step:The sintering mixing material is put into sintering pallet to be sintered.
The quality index of product sinter:Iron content 61wt%, ferrous oxide content 18wt%, sulfur content 0.055%, alkali Spend 10.02wt%, residual carbon content 0.5wt%, the tumbler index 81.05 of hot ore deposit, the tumbler index 81.4 of cold ore deposit;The screening of cold ore deposit Index 9.5.
Embodiment 2
Embodiment 1 is repeated, simply this method further includes:
(E) exhausting step:Exhaust fan is taken away through the bellows under sintering pallet by the flue gas generated is sintered;
(F) dust removal step:Flue gas is passed through electric precipitator dedusting by exhaust fan.
Embodiment 3
Embodiment 2 is repeated, simply binding agent is sodium carbonate;The mixed proportion of incineration of refuse flyash and binding agent is 85:15; The dosage of flying dust mixture is 6wt% in step (B1), total weight of the weight percent based on sintered material.
Embodiment 4
A kind of incineration of refuse flyash and the method for Ferrous Metallurgy dedusting ash comprehensive utilization, this method comprise the following steps:
(A1) flying dust pre-treatment step:It is stirred using incineration of refuse flyash and as the activated alumina of binding agent It is even, obtain flying dust mixture;Wherein:The mixed proportion of incineration of refuse flyash and binding agent is 7:1 (weight ratio);
(A201) flying dust and Ferrous Metallurgy dedusting ash blend step:Steel is added in the flying dust mixture obtained in step (A1) Iron metallurgy dedusting ash mixes after gained mixture is added in water, and the additive amount of water is wetting amount;Wherein:Flying dust mixture Weight ratio with Ferrous Metallurgy dedusting ash is 1:3;
(B2) batching step:By the obtained flying dust of 4 parts by weight and Ferrous Metallurgy dedusting ash mixture and 196 parts by weight Raw materials for sintering mix, obtain sinter mixture, wherein raw materials for sintering include sintering 67wt% iron ore powders, 26wt% flux (dolomite and lime stone 1:1 weight ratio) and 7wt% anchracite duffs;Wherein:Flying dust and Ferrous Metallurgy dedusting ash The dosage of mixture is 4wt%, total weight of the weight percent based on sintered material;
(C) mixed pelletization step:Primary sinter mixture is mixed into (that is, one is mixed) and second by first time mixer Mixer mixing (that is, two is mixed) obtains granular or pellet sintering mixing material;
(D) sintering step:The sintering mixing material is put into sintering pallet to be sintered.
The quality index of product sinter:Iron content 64.5wt%, ferrous oxide content 16.0wt%, sulfur content 0.055%, basicity 10.01wt%, residual carbon content 0.5wt%, the tumbler index 82.04 of hot ore deposit, the tumbler index 82.5 of cold ore deposit; The screening index 9.6 of cold ore deposit.
Embodiment 5
Embodiment 4 is repeated, simply this method further includes:
(E) exhausting step:Exhaust fan is taken away through the bellows under sintering pallet by the flue gas generated is sintered;
(F) dust removal step:Flue gas is passed through electric precipitator dedusting by exhaust fan.
Embodiment 6
Embodiment 4 is repeated, simply the binding agent is iron oxide;The mixed proportion of incineration of refuse flyash and binding agent is 75:15;
Embodiment 7
Embodiment 4 is repeated, the amount that water is simply added in step (A201) causes by flying dust mixture and Ferrous Metallurgy dedusting Water content is 8wt% in the mixture that ash is formed;The weight ratio of flying dust mixture and Ferrous Metallurgy dedusting ash is 1:4.5.
Embodiment 8
Embodiment 4 is repeated, simply in step (B2), the dosage of flying dust and Ferrous Metallurgy dedusting ash mixture is 6wt%, should Total weight of the weight percent based on sintered material.
Embodiment 9
A kind of method of incineration of refuse flyash and the metallurgy sintered recycling of municipal sludge, this method include following step Suddenly:
(A1) flying dust pre-treatment step:Incineration of refuse flyash and potassium carbonate are uniformly mixed, obtain flying dust mixture; Wherein:The mixed proportion of incineration of refuse flyash and potassium carbonate is 3:1;
(A3) municipal sludge pre-treatment step:It will be directly separated through municipal sewage in the sludge and sewage disposal process of generation The sludge of generation is dehydrated by the way of press filtration, is pre-processed the sludge after (or dehydration), and water content is left for 21wt% It is right;
(A301) flying dust and municipal sludge blend step:By by pretreatment municipal sludge (i.e. dewatered sludge) and Flying dust is mixed, and obtains sludge and flying dust mixture;Wherein:Municipal sludge and flying dust after pretreatment (or by be dehydrated) Weight ratio is 1:2;
(B3) batching step:By the obtained sludge of 7 parts by weight and flying dust mixture and the raw materials for sintering of 193 parts by weight It mixes, obtains sinter mixture, wherein raw materials for sintering includes 67wt% iron ore powders, the 26wt% flux of sintering (dolomite and lime stone 1:1 weight ratio) and 7wt% anchracite duffs;Wherein:The dosage of sludge and flying dust mixture is 15wt%, Total weight of the weight percent based on sintered material;
(C) mixed pelletization step:By primary sinter mixture by first time mixer mixing (that is, one is mixed) and optionally Second of mixer mixing (that is, two is mixed) obtains granular or pellet sintering mixing material;
(D) sintering step:The sintering mixing material is put into sintering pallet to be sintered.
The quality index of product sinter:Iron content 61.2wt%, ferrous oxide content 17.2wt%, sulfur content 0.05%, basicity 10.02wt%, residual carbon content 0.5wt%, the tumbler index 82.03 of hot ore deposit, the tumbler index 82.7 of cold ore deposit; The screening index 9.5 of cold ore deposit.
Embodiment 10
Embodiment 9 is repeated, simply this method further includes:
(E) exhausting step:Exhaust fan is taken away through the bellows under sintering pallet by the flue gas generated is sintered;
(F) dust removal step:Flue gas is passed through electric precipitator dedusting by exhaust fan.
Embodiment 11
Embodiment 9 is repeated, simply sludge dewatering is dehydrated using centrifugation in step (A3);Step (A301) is in mixing Quick lime is added in, obtains sludge and flying dust mixture;Wherein, the weight of quick lime and the sludge after pretreatment (or by dehydration) Than for 1:2.
Embodiment 12
Embodiment 9 is repeated, simply the mixed proportion of incineration of refuse flyash and binding agent is 17:5;Carbonic acid is substituted with fluorite Potassium;
Embodiment 13
Embodiment 11 is repeated, simply the weight ratio of quick lime and the sludge after pretreatment (or by dehydration) is 1:4
Embodiment 14
Embodiment 9 is repeated, simply the weight of the municipal sludge in step (A301) after pretreatment (or by dehydration) and flying dust Amount is than being 1:4.
Embodiment 15
Embodiment 9 is repeated, simply the dosage of sludge and flying dust mixture is 12wt% in step (B3), the weight percent Total weight based on sintered material
Embodiment 16
A kind of incineration of refuse flyash, municipal sludge and Ferrous Metallurgy dedusting ash comprehensive utilization method, this method include with Lower step:
(A1) flying dust pre-treatment step:Incineration of refuse flyash and sodium metasilicate are uniformly mixed, obtain flying dust mixture; Wherein:The mixed proportion of incineration of refuse flyash and binding agent is 15:4;
(A3) municipal sludge pre-treatment step:It will be directly separated through municipal sewage in the sludge and sewage disposal process of generation The sludge of generation is dehydrated by the way of press filtration, is pre-processed the sludge after (or dehydration), and water content is left for 21wt% It is right;
(A401) flying dust, Ferrous Metallurgy dedusting ash and municipal sludge blend step:By the municipal sludge by pretreatment (i.e. Dewatered sludge) and flying dust, Ferrous Metallurgy dedusting ash mixed, obtain sludge, Ferrous Metallurgy dedusting ash and flying dust mixing Material;Wherein:Weight ratio by the municipal sludge of pretreatment, flying dust and Ferrous Metallurgy dedusting ash three is 1:2:8;
(A402) preliminary granulation step:By obtained sludge, Ferrous Metallurgy dedusting ash and flying dust mixture in granulator It is mixed, while adds in water, tentatively pelletized, obtain sludge, Ferrous Metallurgy dedusting ash and flying dust mangcorn;Wherein:Add The amount for entering water so that water content is 10wt% in the mixture formed by sludge, Ferrous Metallurgy dedusting ash and flying dust mixture;
(B4) batching step:By the obtained sludge of 12 parts by weight, Ferrous Metallurgy dedusting ash and flying dust mangcorn and 188 The raw materials for sintering of parts by weight mixes, and obtains sinter mixture, and wherein raw materials for sintering includes the 67wt% iron ores of sintering Mountain flour, 26wt% flux (dolomite and lime stone 1:1 weight ratio) and 7wt% anchracite duffs;Wherein:Sludge, Ferrous Metallurgy remove The dosage of dirt ash and flying dust mangcorn is 15wt%, total weight of the weight percent based on sintered material
(C) mixed pelletization step:Primary sinter mixture is mixed into (that is, one is mixed) and second by first time mixer Mixer mixing (that is, two is mixed) obtains granular or pellet sintering mixing material;
(D) sintering step:The sintering mixing material is put into sintering pallet to be sintered.
The quality index of product sinter:Iron content 63.2wt%, ferrous oxide content 16.2wt%, sulfur content 0.05%, basicity 10.00wt%, residual carbon content 0.5wt%, the tumbler index 82.05 of hot ore deposit, the tumbler index 82.8 of cold ore deposit; The screening index 9.4 of cold ore deposit.
Embodiment 17
Embodiment 16 is repeated, simply this method further includes:
(E) exhausting step:Exhaust fan is taken away through the bellows under sintering pallet by the flue gas generated is sintered;
(F) dust removal step:Flue gas is passed through electric precipitator dedusting by exhaust fan.
Embodiment 18
Embodiment 16 is repeated, simply step (A1) middle sodium carboxymethylcellulose (CMC) substitutes sodium carbonate;Waste incineration flies The mixed proportion of ash and binding agent is 41:9.
Embodiment 19
Embodiment 16 is repeated, simply municipal sludge, flying dust and the Ferrous Metallurgy dedusting in step (A401) by pretreatment The weight ratio of grey three is 1:3:9;Step (A401) adds in quick lime in mixing, wherein:Quick lime with pretreatment (or pass through Dehydration) after sludge weight ratio be 1:2.
Embodiment 20
Embodiment 19 is repeated, simply the weight ratio of quick lime and the sludge after pretreatment (or by dehydration) is 1:4.
Embodiment 21
Embodiment 16 is repeated, the amount that water is simply added in step (A402) causes by sludge, Ferrous Metallurgy dedusting ash and flies Water content is 7wt% in the mixture that grey mixture is formed.
Embodiment 22
Embodiment 16 is repeated, simply in step (B4), the dosage of sludge, Ferrous Metallurgy dedusting ash and flying dust mangcorn is 8wt%, total weight of the weight percent based on sintered material.
Technical solution using the present invention can obtain sinter Grade A.Meanwhile it can be very good processing municipal sludge With Ferrous Metallurgy dedusting ash, secondary pollution is avoided.At low cost be also embodied in removes processing municipal sludge without special facility of building again.

Claims (13)

1. a kind of method of refuse incineration flying ash metallurgy sintering recycling, this method comprise the following steps:
(A1) flying dust pre-treatment step:Incineration of refuse flyash and binding agent are uniformly mixed, obtain flying dust mixture;
(B1) batching step:Obtained flying dust mixture with raw materials for sintering is mixed, obtains primary sinter mixture, Middle raw materials for sintering includes iron-bearing material, flux and the fuel of sintering;
(C) mixed pelletization step:Sinter mixture is mixed into (that is, one is mixed) by first time mixer and optional second mixed Conjunction machine mixing (that is, two is mixed) obtains granular or pellet sintering mixing material;
(D) sintering step:The sintering mixing material is put into sintering pallet to be sintered.
2. a kind of incineration of refuse flyash and the method for Ferrous Metallurgy dedusting ash comprehensive utilization, this method comprise the following steps:
(A1) flying dust pre-treatment step:Incineration of refuse flyash and binding agent are uniformly mixed, obtain flying dust mixture;
(A201) flying dust and Ferrous Metallurgy dedusting ash blend step:Steel smelting is added in the flying dust mixture obtained in step (A1) Golden dedusting ash, mixing, obtains flying dust and Ferrous Metallurgy dedusting ash mixture;Preferably add in water;
(B2) batching step:Obtained flying dust and Ferrous Metallurgy dedusting ash mixture with raw materials for sintering are mixed, obtained Sinter mixture, wherein raw materials for sintering include iron-bearing material, flux and the fuel of sintering;
(C) mixed pelletization step:Primary sinter mixture is mixed into (that is, one is mixed) and optional second by first time mixer Secondary mixer mixing (that is, two is mixed) obtains granular or pellet sintering mixing material;
(D) sintering step:The sintering mixing material is put into sintering pallet to be sintered.
3. a kind of method of incineration of refuse flyash and the metallurgy sintered recycling of municipal sludge, this method comprise the following steps:
(A1) flying dust pre-treatment step:Incineration of refuse flyash and binding agent are uniformly mixed, obtain flying dust mixture;
(A3) municipal sludge pre-treatment step:It is generated being directly separated through municipal sewage in the sludge or sewage disposal process of generation Sludge be dehydrated, obtain the sludge of pretreatment;
(A301) flying dust and municipal sludge blend step:Municipal sludge by pretreatment and flying dust are mixed, Ran Houren Selection of land in mixing adds in or is added without quick lime, obtains sludge and flying dust mixture;
(B3) batching step:Obtained sludge and flying dust mixture with raw materials for sintering are mixed, obtain sinter mixture, Wherein raw materials for sintering includes iron-bearing material, flux and the fuel of sintering;
(C) mixed pelletization step:Primary sinter mixture is mixed into (that is, one is mixed) and optional second by first time mixer Secondary mixer mixing (that is, two is mixed) obtains granular or pellet sintering mixing material;
(D) sintering step:The sintering mixing material is put into sintering pallet to be sintered.
4. a kind of method of incineration of refuse flyash, municipal sludge and the comprehensive utilization of Ferrous Metallurgy dedusting ash, this method include following Step:
(A1) flying dust pre-treatment step:Incineration of refuse flyash and binding agent are uniformly mixed, obtain flying dust mixture;
(A3) municipal sludge pre-treatment step:It is generated being directly separated through municipal sewage in the sludge or sewage disposal process of generation Sludge be dehydrated, obtain the sludge of pretreatment;
(A401) flying dust, Ferrous Metallurgy dedusting ash and municipal sludge blend step:Will by pretreatment municipal sludge and flying dust, Ferrous Metallurgy dedusting ash is mixed, and then optionally adds in or be added without quick lime in mixing, obtains sludge, Ferrous Metallurgy Dedusting ash and flying dust mixture;
(A402) preliminary granulation step:Obtained sludge, Ferrous Metallurgy dedusting ash and flying dust mixture are carried out in granulator Mixing, while water is added in, it is tentatively pelletized, obtains sludge, Ferrous Metallurgy dedusting ash and flying dust mangcorn;
(B4) batching step:Obtained sludge, Ferrous Metallurgy dedusting ash and flying dust mangcorn and raw materials for sintering are mixed, Sinter mixture is obtained, wherein raw materials for sintering includes iron-bearing material, flux and the fuel of sintering;
(C) mixed pelletization step:Primary sinter mixture is mixed into (that is, one is mixed) and optional second by first time mixer Secondary mixer mixing (that is, two is mixed) obtains granular or pellet sintering mixing material;
(D) sintering step:The sintering mixing material is put into sintering pallet to be sintered.
5. according to the described method of any one of claim 1-4, it is characterised in that:This method further includes:
(E) exhausting step:Exhaust fan is taken away through the bellows under sintering pallet by the flue gas generated is sintered;And/or
(F) dust removal step:Flue gas is passed through electric precipitator dedusting by exhaust fan.
6. according to the method any one of claim 1-5, it is characterised in that:Raw materials for sintering includes containing for 59-70wt% Iron material (such as iron ore powder), 22-32wt% flux (such as bentonite), 4-10% fuel (such as coal dust), the weight ratio are based on The total weight of raw materials for sintering.
7. according to the method any one of claim 1-6, it is characterised in that:The binding agent is organic binder bond, swollen Moisten the one or more in soil, activated alumina, iron oxide, sodium carbonate, potassium carbonate, sodium metasilicate or fluorite;And/or
In step (A1), the mixed proportion of incineration of refuse flyash and binding agent is 80-99.8:0.2-20, more preferable 90- 99.8:0.2-10, more preferable 95-99.8:0.2-5, such as 97.5-99.8:0.2-2.5.
8. according to the method described in claim 1, it is characterized in that:The dosage of flying dust mixture is 0.3- in step (B1) 5wt%, preferably 0.31-3wt%, more preferable 0.32-2wt%, more preferably 0.33-1wt%, the weight percent are based on burning Tie the total weight (total weight of i.e. whole dispensings or the total weight of primary sinter mixture) of dispensing.
9. according to the method described in claim 2, it is characterized in that:Flying dust mixture and Ferrous Metallurgy dedusting in step (A201) The weight ratio of ash is 1:1.2-6 it is preferably 1:1.5-5 more preferably 1:2-4;Preferably, the amount for adding in water causes by flying dust Water content is 4-12wt% in the mixture that mixture is formed with Ferrous Metallurgy dedusting ash, and more preferable water content is 5-10wt%; And/or
The dosage of flying dust and Ferrous Metallurgy dedusting ash mixture is 1-10wt% in step (B2), preferably 1.5-8wt%, more excellent 1.8-7wt%, more preferable 2-6wt%, more preferable 2.5-5.5wt% are selected, more preferably 3-5wt%, the weight percent are based on The total weight (i.e. whole total weights of dispensing or the total weight of sinter mixture) of sintered material.
10. according to the method described in claim 3, it is characterized in that:In step (A301), after pretreatment (or by dehydration) The weight ratio of municipal sludge and flying dust is 1:0.5-5 is preferably 1:0.8-4.5 is preferably 1:1.2-4 it is preferably 1:1.5- 3.5, more preferably 1:2-3;Preferably, when adding quick lime, quick lime and the sludge after pretreatment (or by dehydration) Weight ratio be 1:1.5-4.5 it is preferably 1:1.7-4 more preferably 1:2-3;And/or
The dosage of sludge and flying dust mixture is 2-18wt% in step (B3), preferably 3-16wt%, more preferable 3.5- 15wt%, more preferable 4-14wt%, more preferably more preferable 4.5-12wt%, 5-10wt%, the weight percent are based on sintering The total weight (total weights of i.e. whole dispensings) of dispensing.
11. according to the method described in claim 4, it is characterized in that:Municipal sludge, flying dust and Ferrous Metallurgy in step (A401) The weight ratio of dedusting ash three is 1:1.3-4:3-18, preferably 1:1.7-3.5:3.5-15 more preferable 1:2-3:4-10;Preferably It is that the weight ratio of quick lime and the sludge after pretreatment (or by dehydration) is 1:1.5-4.5 it is preferably 1:1.7-4, more preferably For 1:2-3.
12. the method according to claim 4 or 11, it is characterised in that:In step (A402), the amount for adding in water causes by dirt Water content is 4-12wt% in the mixture that mud, Ferrous Metallurgy dedusting ash and flying dust mixture are formed, and more preferable water content is 5- 10wt%;And/or
In step (B4), the dosage of sludge, Ferrous Metallurgy dedusting ash and flying dust mangcorn is 3-27wt%, preferably 4- 25wt%, more preferable 5-24wt%, more preferably more preferable 6-22wt%, more preferable 7-20wt%, 8-18wt%, the weight hundred Divide than the total weight (total weights of i.e. whole dispensings) based on sintered material.
13. the method according to claim 3 or 4, it is characterised in that:Sludge dewatering uses mechanical dehydration in step (A3), More preferably it is dehydrated using press filtration or centrifugation.
CN201611004072.9A 2016-11-15 2016-11-15 A kind of method of incineration of refuse flyash, municipal sludge and the metallurgy sintered recycling of Ferrous Metallurgy dedusting ash Pending CN108070723A (en)

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