CN101717853A - Method for preparing sintered mixture from municipal sludge and ferrous iron containing metallurgical dust - Google Patents
Method for preparing sintered mixture from municipal sludge and ferrous iron containing metallurgical dust Download PDFInfo
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- CN101717853A CN101717853A CN200910241914A CN200910241914A CN101717853A CN 101717853 A CN101717853 A CN 101717853A CN 200910241914 A CN200910241914 A CN 200910241914A CN 200910241914 A CN200910241914 A CN 200910241914A CN 101717853 A CN101717853 A CN 101717853A
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Abstract
The invention relates to a method for preparing a sintered mixture from municipal sludge and iron containing metallurgical dust, which belongs to the technical field of resource recycling of the municipal sludge and the iron containing metallurgical dust. The method comprises the following steps of: preparing raw materials from 5-50 percent by weight of municipal sludge and 50-95 percent by weight of iron containing metallurgical dust, adding 0-20 percent by weight of water into the raw materials, then mixing and granulating to produce a sintered granular material, and using the sintered granular material as the mixture to be mixed into a sintering working procedure, wherein the proportion mixed into the sintering working procedure is 0.5-10 percent by weight of the total sintered raw materials quality. The method has the advantages that the processing flow of the municipal sludge is transferred to the mature sintering process flow of ferrous metallurgy, avoiding the problems of new energy consumption, secondary pollution and the like caused in traditional landfill and sintering processes of the municipal sludge, thereby recycling effective elements in the metallurgical dust and the municipal sludge in the steel production flow, improving sintering production process conditions to a certain degree and improving the sintering production efficiency.
Description
Technical field
The invention belongs to the resource circulation utilization technical field of municipal sludge and ferrous iron containing metallurgical dust mud, particularly provide a kind of with municipal sludge and clay method, the innoxious and high added value processing technology field that is equipped with sintered material of ferrous iron containing metallurgical dust, particularly a kind of method of utilizing municipal sludge and iron containing metallurgical dust to prepare sintered material.
Background technology
Municipal sludge is the product in the wastewater treatment process, and prediction shows that China's quantity of wastewater effluent in 2010 will reach 4.40 * 10
10T/a, the year two thousand twenty reaches 5.36 * 10
10T/a.Sludge quantity accounts for the 0.3-0.5% of sewage quantity usually, account for the 1-2% of sewage load, if advanced treatment, sludge quantity also will increase 0.5-1 doubly, with respect to abroad, wastewater treatment in China still is in the evolution, the treatment capacity relative deficiency, but along with the enhancing of common people's environmental consciousness, the formulation of government's environmental protection policy and execution, sewage load and treatment process will be perfect day by day, will produce a large amount of municipal sludges, and data shows that China's existing municipal sewage plant's discharging dewatered sludge is about 3.0 * 10
5T/a annual also increases with about 10% speed, will be Future in China environmental protection development trend to the minimizing and the depolluting processing of mud.
A kind of important channel of sludge treatment is for adopting the mixing cured facture of lime, and it has efficiently, economy, advantage that working cost is low, can improve storage and transportation conditions, avoids the percolate leakage, significantly reduces advantages such as water ratio, so be widely used.Mud after the employing lime treatment, main solid phase composition is for containing the Ca phase (as CaCO3, Ca (OH)
2With CaO etc.), wood fibre, hair and organic matter etc., its again processing mode mostly be landfill and burning disposal, on the one hand inevitably environment is caused secondary pollution, on the other hand land occupation, the a large amount of useful composition that wherein contains is wasted, and contains Ca component etc. as wherein the valency that has.How municipal sludge is carried out minimizing, innoxious and even high value added utilization will be a developing tendency in future.
Iron and steel enterprise has produced a large amount of ion dust mud contanings in steel manufacture process, as blast furnace dust, blast furnace gas mud, sintering dust separation ash, converter OG mud, steel scale of steel rolling etc.Iron and steel enterprise directly allocates sinter mixture into to the many employings of mode that utilize of metallurgical dust mud at present, and the shortcoming of its existence is: 1) dirt mud fine size is easy to generate secondary pollution in transportation, mixing and sintering process; 2) in sintering process, the thin and higher dirt mud of water content will worsen the sintered layer ventilation property, influence the SINTERING PRODUCTION technical indicator, make sinter quality descend, and cause output to reduce.
Because the municipal sludge tool is a bit sticky, and can effectively improve granulation performance after metallurgical dust mud mixes, and the large quantities of lime that contains in the component can be used as the lime flux in the sintering process.Carry out mixing granulation with mud and metallurgical dust mud, not only can effectively utilize mud, realize minimizing, the innoxious and incrementization utilization of municipal sludge, avoid pollution environment.
Municipal sludge utilizes mode mostly to be preparation haydite (patent CN1109850 again, CN101429006, CN101514112), brickmaking (patent CN1413939, CN101058501) etc., its preparation method generally need add other raw materials such as clay, flyash, and its preparation process needs through multiple complicated procedures of forming such as super-dry, stirring, granulation, oven dry, roasts, and as utilizing in building, the civil construction, added value is relatively low mostly.
Chinese patent CN1249353 proposes a kind of waste disposal that adopts and allocates the method that sintering prepares the blast furnace sinter ore deposit into, this invention is with rubbish such as municipal wastes, domestic refuse, industrial waste, discarded (the trolley part of general waste and crusher, family's electrical article, the broken thing of household electrical appliances article component) etc. solid fuel substitutes the part coke powder through the carbide after the multiple processing, foregoing invention mainly is the processing at different rubbish, especially a utilization at C element in the rubbish, can handle multiple waste products, but because component of refuse is various, phase composite differs, it is selected and defines comparatively complicated with composition, treatment process to its product carbide is comparatively complicated, utilize valuable component comparatively single, the raw materials pretreatment cost is higher, and the ratio of allocating carbide into is lower, only about 0.4-2.4wt%, so be difficult to extensively be promoted.
Chinese patent CN101321879 proposes a kind of prilling process of raw materials for sintering, promptly adopt iron dust containing, mud directly or with the mixture of itself and lime mud, powdery coke etc. to prepare the method for granulation particle reuse sintering circuit, this invention can effectively utilize iron dust containing or mud.But above-mentioned granulation needs to select specific object at granulating raw material, adding granularity as needs is coarse grain more than the 2mm 20wt% that returns mine, and also need the granulation particle is carried out skin covering granulating working procedure, promptly in the granulation particle, to add the powdery coke and carry out secondary covering granulation, operation is comparatively complicated.
Through document and patent retrieval, do not find with municipal sludge and the clay sintered material fully of ferrous iron containing metallurgical dust, and the application of sintered material in sintering process of preparation in this way.
Summary of the invention
The object of the present invention is to provide a kind ofly with the clay method that is equipped with sintered material of municipal sludge and ferrous iron containing metallurgical dust, emphasis has solved following several key technical problems:
(1) solves the accumulation occupation of land and the secondary pollution problem of municipal sludge, and made full use of the valuable component in the mud;
(2) solve metallurgical dust mud secondary pollution and the problem that influences the sintering ventilation property in sintering process, improve the proportion of utilization of metallurgical dust mud at sintering process;
(3) with municipal sludge and metallurgical dust mud as sintered material reuse agglomerating adaptability problem, can make full use of all kinds of ion dust mud contanings that each link of municipal sludge and Steel Complex produces.
Based on municipal sludge bulk deposition, land occupation, contaminate environment after processing, and the valuable component after employing accumulation or the burning disposal in the mud also is not used, utilize under the prerequisite again based on sludge treatment minimizing, innoxious and valuable component, the present invention is on the basis that does not change sintering circuit, equipment, municipal sludge and ferrous metallurgy sludge are carried out mixing granulation production sintered material, realize the minimizing and the high value added utilization of solid waste such as metallurgical dust mud and municipal sludge.Its principle is: after the municipal sludge of high-moisture percentage and metallurgical dust mud quantitative ingredient, water transfer, carry out uniform mixing, the capillary water that utilizes the allocation sheet surface tension to form carries out granulation according to the principle of " balling-up of dripping, fog is grown up, anhydrous compressing ".Fig. 1 is the clay process flow sheet that is equipped with sintered material of municipal sludge and metallurgical dust.
Processing step of the present invention is: hundred content municipal sludge 5-50wt%, ferrous metallurgy sludge 50-95wt% dispose raw material by weight, 0.5-20wt% water will be added again in the raw material, mix then, granulation, produce the sintered particles material, allocate in the sintering circuit as batching and to use, the ratio of allocating sintering circuit into is the 0.5-10wt% of sintering total raw material quality.
Described municipal sludge is the Sewage Plant calcification mud after the mixing cured method of lime is handled, and its water ratio is controlled to be 0-50wt%.
Described ferrous metallurgy sludge kind comprises the dirt mud that all metallurgical technology processes such as blast furnace dust, blast furnace gas mud, sintering dust separation ash, converter OG mud, steel scale of steel rolling produce.The proportioning raw materials design can be formed the proportioning of carrying out a kind of or more than one dirt mud according to the original components of metallurgical dust mud and add, and as employing one-component blast furnace dust, or adopts blast furnace dust+blast furnace gas mud complex group to grade.
Described municipal sludge and metallurgical dust mud mix blended basis of time material characteristic, be controlled to be 1-5 minute.
The granulation after mixing of described municipal sludge and metallurgical dust mud, preparation sintered particles material, mixing, granulation material moisture are controlled at 10wt%-20wt%, the size control of particulate material is＜10mm, dropping strength is more than 3 times, and the ratio of allocating sintering circuit into is the 0.5-10wt% of sintering total raw material quality.
The main raw material component and the agglomerate of sintered particles material have good corresponding relationship, and promptly its main component all can be used as raw material, fuel and flux use, can effectively reduce the agglomerate cost.
In the main raw material of the present invention, the mud (different so have different water ratio) that municipal sludge adopts the mixing cured method of lime to handle according to set time, ferrous metallurgy sludge comprises blast furnace dust, blast furnace gas mud, converter OG mud, steel scale of steel rolling etc., carry out the proportioning of different material according to the chemical constitution of solid waste, and add moisture and carry out mixing granulation.
The present invention compares with existing traditional treatment method, and aforesaid method has following advantage:
(1) the present invention has realized the two unified utilization of all ion dust mud contanings of iron and steel enterprise and municipal sludge, realizes that resource high-efficiency recycles, and reduces ironmaking cost and the metallurgy processing cost of giving up admittedly;
(2) raw material that designs among the present invention mixes and homogenizes and granulating technology, because the sintered material composition is even, the particle appropriateness helps improving the ventilation property and the sinter quality of SINTERING PRODUCTION, has reduced the load of sintering dust, helps environment protection;
(3) the municipal sludge adding technique that designs among the present invention, for the processing of solid waste such as municipal wastes, municipal sludge etc. provides novel method, soon cumulative year after year, the municipal wastes that needs to be resolved hurrily, solid waste problem cause adult form industry as handling in the iron and steel metallurgical industry Production Flow Chart with Economic development, realize the green metallurgical and the environment-friendly function of modernized iron and steel enterprise, thus the decrement and the high value added utilization of realization resource and energy recycling, solid waste.Demonstrated fully Iron And Steel Industry " cleaner production " and " recycling economy " theory, obtained social influence simultaneously, environmental benefit and economic benefit.
Description of drawings
Fig. 1 prepares the process flow sheet of sintered material for the present invention.
Embodiment
Technological process can be divided into following steps:
(1) one-tenth of mensuration raw material is grouped into and water content, and calculate proportioning and add two or more different material, as:
1. be raw material with moisture municipal sludge of height and metallurgical powder (water content is lower, as blast furnace dust);
2. be raw material with moisture municipal sludge of height and metallurgical mud (water content is higher, as blast furnace gas mud, converter OG mud);
3. be raw material with low moisture municipal sludge and metallurgical powder (water content is lower, as blast furnace dust);
4. be raw material with low moisture municipal sludge and metallurgical mud (water content is higher, as blast furnace gas mud, converter OG mud);
5. be raw material with the moisture municipal sludge of height and metallurgical dust mud (collocation of two kinds or more metallurgical dust mud is used, and as the use of arranging in pairs or groups jointly of blast furnace dust and blast furnace gas mud, total water content is decided based on the ratio of different material);
6. be raw material with low moisture municipal sludge and metallurgical dust mud (collocation of two kinds or more metallurgical dust mud is used, and as the use of arranging in pairs or groups jointly of blast furnace dust and blast furnace gas mud, total water content is decided based on the ratio of different material);
(2) compound is put to the mixing machine evenly mixed;
(3) calculate the total water content of compound according to proportioning, in tablets press, replenish suitable moisture, carry out granulation, different according to proportioning raw materials kind and amount of water, after the granulation size of spherolite should＜10mm;
(4) spherolite uses in sintering circuit as sintered material;
Embodiment 1
In the proportioning raw materials (in 100%) that will carry out the sintered material preparation, be main raw material with municipal sludge and gas ash, high water-containing sludge in the proportioning raw material (lime calcification mud, water content: 40%; CaO:49.2%; SiO
2: addition 3.0%) is 30%, gas ash (water content: 2%; TFe:22.0%; C:46.5%; SiO
2: 6.4%; CaO:4.9%) addition is 70%, raw material is mixed in mixing machine, after mending the moisture of going into to account for total proportioning quality 9.6wt%, carry out granulation again, filter out suitable dimension (＜10mm) granulation particle by vibration screening device, standby as sintered material, the main component of the spherolite of making is: TFe:17.1%; C:36.1%; SiO
2: 5.4%; CaO:9.9% carries out the mensuration of 0.5m dropping strength and ultimate compression strength to the spherolite of 20 particle diameter 5-10mm, and 0.5m dropping strength mean value is 5.8 times, and resistance to compression degree mean value is 19.1N, has working strength preferably.
Embodiment 2
In the proportioning raw materials (in 100%) that will carry out the sintered material preparation, be main raw material with municipal sludge and gas ash, dewatered sludge in the proportioning raw material (lime calcification mud, water content: 2%; CaO:49.2%; SiO
2: addition 3.0%) is 24%, gas ash (water content: 2%; TFe:22.0%; C:46.5%; SiO
2: 6.4%; CaO:4.9%) addition is 76%, raw material is mixed in mixing machine, after mending the moisture of going into to account for total proportioning quality 19.8wt%, carry out granulation again, filter out suitable dimension (＜10mm) granulation particle by vibration screening device, standby as sintered material, the main component of the spherolite of making is: TFe:16.4%; C:36.7%; SiO
2: 5.5%; CaO:12.7% carries out the mensuration of 0.5m dropping strength and ultimate compression strength to the spherolite of 20 particle diameter 5-10mm, and 0.5m dropping strength mean value is 6.8 times, and resistance to compression degree mean value is 22.6N, has working strength preferably.
Embodiment 3
In the proportioning raw materials (in 100%) that will carry out the sintered material preparation, with municipal sludge, gas ash and converter OG mud are main raw material, municipal sludge in the proportioning raw material (lime calcification mud, water content: 40%; CaO:49.2%; SiO
2: addition 3.0%) is 20%, gas ash (water content: 2%; TFe:22.0%; C:46.5%; SiO
2: 6.4%; CaO:4.9%) addition is 40%, converter OG mud (water content: 20%; TFe:41.5%; C:4.4%; SiO
2: 2.4%; CaO:20.0%) addition is 40%, raw material is mixed in mixing machine, after mending the moisture of going into to account for total proportioning quality 8.0wt%, carry out granulation again, filter out suitable dimension (＜10mm) granulation particle by vibration screening device, standby as sintered material, the main component of the spherolite of making is: TFe:26.3%; C:23.6%; SiO
2: 4.4%; CaO:17.1% carries out the mensuration of 0.5m dropping strength and ultimate compression strength to the spherolite of 20 particle diameter 5-10mm, and 0.5m dropping strength mean value is 8.9 times, and resistance to compression degree mean value is 29.1N, has working strength preferably.
Claims (5)
1. one kind with the clay method that is equipped with sintered material of municipal sludge and ferrous iron containing metallurgical dust, it is characterized in that, hundred content municipal sludge 5-50wt%, ferrous metallurgy sludge 50-95wt% dispose raw material by weight, 0.5-20wt% water will be added again in the raw material, mix then, granulation, produce the sintered particles material, allocate in the sintering circuit as batching and use, the ratio of allocating sintering circuit into is the 0.5-10wt% of sintering total raw material quality.
2. by the described method of claim 1, it is characterized in that described municipal sludge is the Sewage Plant calcification mud after the mixing cured method of lime is handled, its water ratio is controlled to be 0-50wt%.
3. by the described method of claim 1, it is characterized in that described ferrous metallurgy sludge comprises the dirt mud that all metallurgical technology processes of blast furnace dust, blast furnace gas mud, sintering dust separation ash, converter OG mud or steel scale of steel rolling produce.
4. by the described method of claim 1, it is characterized in that the blended time of carrying out of described municipal sludge and metallurgical dust mud is controlled to be 1-5 minute.
5. by the described method of claim 1, it is characterized in that: mixing, granulation material moisture are controlled at 10wt%-20wt%, and the size control of particulate material is＜10mm that dropping strength is more than 3 times.
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| CN102030450A (en) * | 2010-09-30 | 2011-04-27 | 首钢总公司 | Method for utilizing municipal sludge as raw material of steel industrial sintering ore |
| CN102409169A (en) * | 2010-09-25 | 2012-04-11 | 北京君致清科技有限公司 | Pellet ore binder prepared by taking sludge generated in sewage treatment as raw material |
| CN104278145A (en) * | 2014-10-15 | 2015-01-14 | 首钢总公司 | Method for producing sintering ore |
| CN104341087A (en) * | 2014-10-30 | 2015-02-11 | 唐山首钢京唐西山焦化有限责任公司 | Method for treating coking biochemical sludge |
| CN106148685A (en) * | 2016-07-28 | 2016-11-23 | 重庆大学 | A kind of municipal sludge and iron-containing waste prepare the method for acid pellet |
| CN106191429A (en) * | 2016-08-09 | 2016-12-07 | 重庆大学 | A kind of city sewage sludge reclamation Application way |
| CN106191435A (en) * | 2016-08-09 | 2016-12-07 | 重庆大学 | A kind of municipal sludge resource utilization method in pellet sintering |
| CN106191427A (en) * | 2016-08-09 | 2016-12-07 | 重庆大学 | A kind of municipal sludge mixes resource utilization method with useless fabric |
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| CN107304126A (en) * | 2016-04-21 | 2017-10-31 | 武汉科技大学 | A kind of slag haydite |
| CN108070714A (en) * | 2016-11-15 | 2018-05-25 | 中冶长天国际工程有限责任公司 | It is a kind of to utilize metallurgy sintered process sludge and the method for Ferrous Metallurgy dedusting ash |
| CN108070723A (en) * | 2016-11-15 | 2018-05-25 | 中冶长天国际工程有限责任公司 | A kind of method of incineration of refuse flyash, municipal sludge and the metallurgy sintered recycling of Ferrous Metallurgy dedusting ash |
| CN109365490A (en) * | 2018-12-07 | 2019-02-22 | 中南大学 | A method of utilizing metallurgy and municipal solid waste preparation sintering NOx inhibitor |
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| CN112573900A (en) * | 2020-11-23 | 2021-03-30 | 南阳仁创再生资源有限公司 | Recycling method of casting dust and sludge |
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| CN113174482A (en) * | 2021-03-22 | 2021-07-27 | 中冶长天国际工程有限责任公司 | Process and device for cooperatively treating municipal sludge in iron ore sintering process |
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| CN102030450A (en) * | 2010-09-30 | 2011-04-27 | 首钢总公司 | Method for utilizing municipal sludge as raw material of steel industrial sintering ore |
| CN104278145A (en) * | 2014-10-15 | 2015-01-14 | 首钢总公司 | Method for producing sintering ore |
| CN104341087A (en) * | 2014-10-30 | 2015-02-11 | 唐山首钢京唐西山焦化有限责任公司 | Method for treating coking biochemical sludge |
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| CN106191429A (en) * | 2016-08-09 | 2016-12-07 | 重庆大学 | A kind of city sewage sludge reclamation Application way |
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| CN106521146A (en) * | 2016-10-10 | 2017-03-22 | 山东钢铁股份有限公司 | Utilization method for sintering machine head dedusting ash |
| CN108070714A (en) * | 2016-11-15 | 2018-05-25 | 中冶长天国际工程有限责任公司 | It is a kind of to utilize metallurgy sintered process sludge and the method for Ferrous Metallurgy dedusting ash |
| CN108070723A (en) * | 2016-11-15 | 2018-05-25 | 中冶长天国际工程有限责任公司 | A kind of method of incineration of refuse flyash, municipal sludge and the metallurgy sintered recycling of Ferrous Metallurgy dedusting ash |
| CN109365490A (en) * | 2018-12-07 | 2019-02-22 | 中南大学 | A method of utilizing metallurgy and municipal solid waste preparation sintering NOx inhibitor |
| CN109365490B (en) * | 2018-12-07 | 2020-08-25 | 中南大学 | Method for preparing sintering NOx inhibitor by utilizing metallurgy and municipal solid wastes |
| CN110483093A (en) * | 2019-09-11 | 2019-11-22 | 武汉钢铁有限公司 | Steel plant's comprehensive wastewater sludge base water-keeping material and preparation method thereof |
| CN110483093B (en) * | 2019-09-11 | 2022-02-08 | 武汉钢铁有限公司 | Comprehensive wastewater sludge-based water retention material for steel plant and preparation method thereof |
| CN111074067A (en) * | 2020-01-11 | 2020-04-28 | 武钢集团昆明钢铁股份有限公司 | Preparation method of carbonized sludge particles for iron ore powder sintering additive |
| CN112573900A (en) * | 2020-11-23 | 2021-03-30 | 南阳仁创再生资源有限公司 | Recycling method of casting dust and sludge |
| CN113174482A (en) * | 2021-03-22 | 2021-07-27 | 中冶长天国际工程有限责任公司 | Process and device for cooperatively treating municipal sludge in iron ore sintering process |
| CN113154396A (en) * | 2021-04-16 | 2021-07-23 | 中冶长天国际工程有限责任公司 | Solid waste, sintering and pellet cooperative treatment process based on reasonable water control |
| CN113981215A (en) * | 2021-09-23 | 2022-01-28 | 武汉钢铁有限公司 | Method for preparing sintered ore by taking municipal sludge and metallurgical dust and sludge as raw materials |
| CN115181597A (en) * | 2022-06-30 | 2022-10-14 | 武汉钢铁有限公司 | Biomass fuel, preparation method thereof and application thereof in iron ore sintering |
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