CN100546723C - A kind of process of from gas mud, extracting iron, carbon - Google Patents
A kind of process of from gas mud, extracting iron, carbon Download PDFInfo
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- CN100546723C CN100546723C CNB2007100616403A CN200710061640A CN100546723C CN 100546723 C CN100546723 C CN 100546723C CN B2007100616403 A CNB2007100616403 A CN B2007100616403A CN 200710061640 A CN200710061640 A CN 200710061640A CN 100546723 C CN100546723 C CN 100546723C
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Abstract
A kind of process of extracting iron, carbon from gas mud belongs to the solid-liquid separation technique field, is used for solving the problem that utilities such as blast furnace gas mud iron, carbon are difficult to extract.Special feature is: it is made up of operations such as mixing, centrifugation, grading, accent thickness particle mixed liquor, gravity separation, dehydrations.Test shows that the product grade and the rate of recovery that adopt this method to reclaim are all higher, can from gas mud, extract 〉=63% iron is more than 85%, and the zinc content that reclaims reaches 0.12-0.16, 〉=73% carbon is more than 78%, and have that floor space is little, plant and equipment less investment, technology are simple, without floating agent, cause many-sided advantages such as secondary pollution, production cost be low can not for the environment of enterprise.The present invention is applicable to that ferrous grade is low, particle is tiny, and particularly granularity accounts for the recycling of the tiny iron content carbon gas mud more than 50% at 325#.
Description
The present invention relates to a kind of technology of from the iron-smelter blast furnace gas mud, extracting iron, carbon, belong to the solid-liquid separation technique field.
Background technology
Gas mud is that blast furnace ironmaking is discharged the coal gas flue dust through the dirt mud after the water washing, contain a large amount of iron, carbon, elements such as zinc, steel plant generally mix it in sintering feed multiplexing, but because the accumulation of harmful elements such as zinc makes furnace nodulation, had a strong impact on the service life of blast furnace, also there is the part gas mud to be sold when waste product, make the benefit of iron and steel enterprise be subjected to certain influence, in order to do the cleaner production of iron and steel enterprise well, the increasing resource circulation is utilized, improve economic benefit of enterprises, the insider has done many researchs and discussion to the extracting method and the technology of beneficial element in the blast furnace gas mud, has found out some technologies and method.As magnetic method, this method is to utilize the principle of magnetic dressing, utilize magnetic separator to extract iron in the gas mud, the problem that exists is that this method can only improve 15.87% to the grade of iron in the gas mud, be up to 51.57%, and carbon and other beneficial elements can not extract, and the rate of recovery is low, is unfavorable for the resource circulation utilization.Also has a kind of flotation+gravity preparation method, this method is the product that floatation combines with gravitational method, the rate of recovery increases than magnetic method, but the grade of iron powder is still undesirable, do not reach the requirement of the required iron-holder of suitability for industrialized production＞60%, also need to mix a large amount of high-grade breezes, just can carry out sintering and smelt.This method factory building, equipment input are too big, have increased the expense of found the factory initial investment and equipment operation and plant maintenance.When also having flotation, need to drop into a large amount of floating agents, promptly strengthened production cost and caused second environmental pollution to enterprise again, be unfavorable for the cleaner production of enterprise.
Summary of the invention
Technical problem to be solved by this invention is: the process of extracting iron, carbon from gas mud that a kind of less investment, product grade and the rate of recovery are all high, can not cause secondary pollution to the environment of enterprise is provided.
The alleged problem of the present invention is solved by following technical scheme:
A kind of its special feature of process that extracts iron, carbon from gas mud is: it may further comprise the steps:
A. mix: gas mud is sent in first blender, added the mud of water furnishing concentration 10-30%, stir, pump in the centrifugal separator;
B. centrifugation: in centrifugal classifier from raw slurry initial gross separation tap a blast furnace, carbon mix, iron, carbon mix are transported in the gradation machine, mine tailing enters concentration basin;
C. grading: the iron carbon mix classification that will enter in the gradation machine is handled, and thick after the classification, fine grained is transported to respectively in coarse granule blender, the fine grained blender; The gradation granularity is thick, fine grained boundary with 100#;
D. transfer thick, fine grained mixed liquor: with mixed liquor thick, that fine-grained mixture concentration is adjusted to 10-30%, be transported in the gravity separator of different size respectively;
E. gravity separation: thick, fine grained mixed liquor carries out iron respectively in gravity separator, carbon separates;
F. dehydration: isolated iron powder, carbon dust carry out processed respectively, the iron powder after the dehydration, carbon dust warehouse-in.
The above-mentioned process of from gas mud, extracting iron, carbon, the centrifugal separator inlet flow rate per hour is not more than 30 cubic metres in the described b step, and pressure is between 0.2-0.4Mpa; In the described e step, the gradation granularity is+concentration of the mixed liquor of 100# is between 10-30%, at inlet flow rate for per hour being not less than 2 cubic metres, carrying out iron carbon in the gravity separator of flow velocity between 4-6m/s separates, the gradation granularity is-concentration expressed in percentage by weight of the mixed liquor of 100# is between 10-30%, per hour be not less than 1.5 cubic metres at inlet flow rate, carry out iron, carbon separation in the gravity separator of flow velocity between 2-4m/s.
Extract the process of iron, carbon in the above-mentioned gas mud, enter the mine tailing of concentration basin in the described b step, when treating its concentration that is concentrated to 0.5-10%, pump per hour is not more than 15 cubic metres to inlet flow rate, carry out the extraction of free carbon in the centrifugal classifier of pressure 0.2-0.4Mpa, the free carbon that extracts dehydration warehouse-in; Be transported in the filter press and dewater extracting mine tailing behind the free carbon, the mud cake that press filtration goes out carries out the extraction of zinc or send the cement plant or brick field is handled.
The above-mentioned process of extracting iron, carbon from gas mud, the water after described each step process recycles.
The present invention be low according to the blast furnace gas mud ferrous grade, particle is tiny and multiple element gluing together, adopt conventional method to be difficult to incite somebody to action the practical problem that beneficial element wherein extracts, utilize the coke powder in the gas mud and the very big characteristics of density contrast of iron powder, the theory of the power of wanting the force of gravity place to be subjected in the centrifugal suffered power of leaving the theatre according to same particle big tens times even hundred times is designed iron, carbon novel technology for extracting in the gas mud that centrifugation+gradation+gravity classification extraction combines.Test shows that the product grade and the rate of recovery that adopt this method to reclaim are all high, can from gas mud, extract 〉=63% iron powder is more than 85%, and the zinc content in the iron powder of recovery meets standard-required fully between 0.12-0.16%; 〉=73% carbon dust is more than 78%, and it is little to have floor space, the plant and equipment less investment, and technology is simple, without floating agent, can not cause many-sided advantages such as secondary pollution, production cost be low to corporate environment.The present invention is applicable to that ferrous grade is low, particle is tiny, particularly granularity accounts for the recycling of the tiny iron content carbon gas mud more than 50% at-325#, and the iron in the above bulky grain gas mud of+325#, the recovering effect of carbon are also fine.
Description of drawings
Fig. 1 is a process chart of the present invention.
Label and alphabetical implication are as follows in the accompanying drawing: 1. gas mud raw material; 2. first blender; 3. centrifugal classifier; A gradation machine; A. mine tailing concentration basin; B. coarse granule blender; B1. fine grained blender; C. coarse granule gravity separator; C1. fine grained gravity separator; D. carbon dust dehydration; D1. iron powder dehydration; B. centrifugal classifier; B1. free carbon dehydration; C. filter press dehydration; C1. mud cake is deposited.
The specific embodiment
The blast furnace gas mud ferrous grade is low, and only about 23-34.7%, particle is tiny for the content of its iron, and wherein diameter accounts for more than 50% at the fine particle of 0.044mm (325#), and multiple element gluing together, very thickness.It is different from the primary ore good dispersion, and washability is strong, adopts conventional method to be difficult to beneficial element is wherein selected.The density contrast of coke powder in the gas mud and iron powder is very big simultaneously, (dc=0.87dFe=4.9-5.3).The present invention is according to the above-mentioned characteristic of blast furnace gas mud, utilize coke powder and iron powder big characteristics of density contrast between the two, according to the theory of same particle, design iron, carbon extraction process in the blast furnace gas mud that centrifugation+gradation+gravity classification extraction combines in big tens times even big hundred times of the centrifugal power of wanting the force of gravity place to be subjected to of leaving the theatre.
Provide specific embodiment below in conjunction with accompanying drawing:
Embodiment 1: the raw material gas mud: contain TFe26.75%, Tc27.68%., Zn0.46%.Wherein dynamics accounts for more than 50% at the fine particle more than-325.
The gas mud raw material sent into add water furnishing 10% weight ratio gas mud in first blender 2; stir then; pump in the centrifugal classifier 3 with slush pump after stirring; the centrifugal classifier inlet pressure is controlled at 0.2Mpa; flow-control is at per hour 30 cubic metres; iron carbon in the gas mud is reclaimed; the iron carbon mix that extracts flowed among the gradation machine A along pipeline carry out grading; the grading standard is boundary with 100#, will sub-elect then+the following short grained iron carbon mix of the above bulky grain of 100# and-100# flows into coarse granule blender B along separately pipeline respectively; fine grained blender B1.Then mixture is distinguished the slurries of furnishing concentration 10% weight ratio, with+mixed serum of 100# to per hour 2 cubic metres of inlet flow rates, carries out iron with the slush pump pump among the gravity separator C of flow velocity 6m/s, carbon separates.With the mixed serum of-100# with the pump pump to per hour 1.5 cubic metres of inlet flow rates, carry out the separation of iron carbon among the gravity separator C1 of flow velocity 4m/s.Carbon dust after separating is put into the D dehydration dispatch from the factory, the iron powder after separating is put into the D1 dehydration dispatch from the factory or carry out deep processing;
With centrifugal classifier 3 sortings tap a blast furnace, mine tailing behind the carbon mix flows among the concentration basin a along pipeline and concentrates, when waiting to be concentrated to the concentration of weight ratio 0.5%, per hour be not less than 15 cubic metres with the slush pump pump to inlet flow rate, carry out the extraction of free carbon among the centrifugal classifier b of pressure 0.2Mpa, the free carbon that extracts flows into to dewater among the b1 along pipeline and dispatches from the factory; Flow among the filter press c along pipeline and dewater extracting mine tailing behind the free carbon, the mud cake that press filtration is gone out is put into c1 and is prepared to carry out the extraction of zinc or send cement plant, brick field system cement or bake bricks then.Water after this PROCESS FOR TREATMENT can recycle.The object circulation of this technology all adopts automation to finish.
Embodiment 2: the raw material gas mud: contain TFe26.75%, Tc27.68%., Zn0.46%.Wherein dynamics accounts for more than 50% at the fine particle more than-325.
The gas mud raw material sent into add water furnishing 20% weight ratio gas mud in first blender 2; stir then; pump in the centrifugal classifier 3 with slush pump after stirring; the centrifugal classifier inlet pressure should be controlled at 0.3Mpa; flow-control is at per hour 30 cubic metres; iron carbon in the gas mud is reclaimed; the iron carbon mix that goes out that extracts flowed among the gradation machine A along pipeline carry out grading; the grading standard is boundary with 100#, will sub-elect then+the following short grained iron carbon mix of the above bulky grain of 100# and-100# flows into coarse granule blender B along separately pipeline respectively; fine grained blender B1.Then with the mixture slurries of furnishing concentration 20% weight ratio respectively ,+the mixed serum of 100# to per hour 2 cubic metres of inlet flow rates, is carried out the separation of iron carbon with the slush pump pump among the gravity separator C of flow 5m/s.With the mixed serum of-100# with the pump pump to per hour 1.5 cubic metres of inlet flow rates, carry out the separation of iron carbon among the gravity separator C1 of flow 3m/s.Carbon dust after separating is put into the D dehydration dispatch from the factory, the iron powder after separating is put into the D1 dehydration dispatch from the factory or carry out deep processing;
Tap a blast furnace mine tailing behind the carbon mix of centrifugal classifier Fig. 3 sorting is flowed among the concentration basin a along pipeline and concentrates, when waiting to be concentrated to the concentration of weight ratio 5%, per hour be not less than 15 cubic metres with the slush pump pump to inlet flow rate, carry out the extraction of free carbon among the centrifugal classifier b of pressure 0.3Mpa, the free carbon that extracts flows into to dewater among the b1 along pipeline and dispatches from the factory; Flow among the filter press c along pipeline and dewater extracting mine tailing behind the free carbon, the mud cake that press filtration is gone out is put into c1 and is prepared to carry out the extraction of zinc or send cement plant, brick field system cement or bake bricks then.Water after this PROCESS FOR TREATMENT can recycle.The object circulation of this technology all adopts automation to finish.
Embodiment 3: the raw material gas mud: contain TFe26.75%, Tc27.68%., Zn0.46%.Wherein dynamics accounts for more than 50% at the fine particle more than-325.
The gas mud raw material sent into add water furnishing 30% weight ratio gas mud in first blender 2; stir then; pump in the centrifugal classifier 3 with slush pump after stirring; the centrifugal classifier inlet pressure should be controlled at 0.4Mpa; flow-control is at per hour 30 cubic metres; iron carbon in the gas mud is reclaimed; the iron carbon mix that goes out that extracts flowed among the gradation machine A along pipeline carry out grading; the grading standard is boundary with 100#, will sub-elect then+the following short grained iron carbon mix of the above bulky grain of 100# and-100# flows into coarse granule blender B along separately pipeline respectively; fine grained blender B1.Then with the mixture slurries of furnishing concentration 30% weight ratio respectively ,+the mixed serum of 100# to per hour 2 cubic metres of inlet flow rates, is carried out the separation of iron carbon with the slush pump pump among the gravity separator C of flow 4m/s.With the mixed serum of-100# with the pump pump to per hour 1.5 cubic metres of inlet flow rates, carry out the separation of iron carbon among the gravity separator C1 of flow 2m/s.Carbon dust after separating is put into the D dehydration dispatch from the factory, the iron powder after separating is put into the D1 dehydration dispatch from the factory or carry out deep processing;
Tap a blast furnace mine tailing behind the carbon mix of centrifugal classifier Fig. 3 sorting is flowed among the concentration basin a along pipeline and concentrates, when waiting to be concentrated to the concentration of weight ratio 10%, per hour be not more than 15 cubic metres with the slush pump pump to inlet flow rate, carry out the extraction of free carbon among the centrifugal classifier b of pressure 0.4Mpa, the free carbon that extracts flows into to dewater among the b1 along pipeline and dispatches from the factory; Flow among the filter press c along pipeline and dewater extracting mine tailing behind the free carbon, the mud cake that press filtration is gone out is put into c1 and is prepared to carry out the extraction of zinc or send cement plant, brick field system cement or bake bricks then.Water after this PROCESS FOR TREATMENT can recycle.The object circulation of this technology all adopts automation to finish.
Claims (4)
1, a kind of process of extracting iron, carbon from gas mud, it is characterized in that: it comprises the steps:
A. mix: gas mud is sent in first blender (2), and adding water furnishing concentration expressed in percentage by weight is the mud of 10-30%, stirs, and pumps in the centrifugal classifier;
B. centrifugation: in centrifugal classifier from raw slurry initial gross separation tap a blast furnace, carbon mix, iron, carbon mix are transported in the gradation machine, mine tailing enters concentration basin;
C. grading: the iron carbon mix classification that will enter in the gradation machine is handled, and thick after the classification, fine grained is transported to respectively in coarse granule blender (B), the fine grained blender (B1); The gradation granularity is thick, fine grained boundary with 100#;
D. transfer thick, fine grained mixed liquor: with mixed liquor thick, that the fine-grained mixture concentration expressed in percentage by weight is adjusted to 10-30%, be transported in the gravity separator of different size respectively;
E. gravity separation: thick, fine grained mixed liquor carries out iron respectively in gravity separator, carbon separates;
F. dehydration: isolated iron powder, carbon dust carry out processed respectively, the iron powder after the dehydration, carbon dust warehouse-in.
2, the process of extracting iron, carbon from gas mud according to claim 1 is characterized in that: the centrifugal classifier inlet flow rate per hour is not more than 30 cubic metres in the described b step, and pressure is between 0.2-0.4Mpa; In the described e step gradation granularity be+mixed liquor of 100# is per hour 2 cubic metres at inlet flow rate, carry out iron, carbon separation in the gravity separator of flow velocity between 4-6m/s, the gradation granularity per hour is not less than 1.5 cubic metres for the mixed liquor of-100# at inlet flow rate, carries out iron carbon in the gravity separator of flow velocity between 2-4m/s and separates.
3, the process of from gas mud, extracting iron, carbon according to claim 1, it is characterized in that: the mine tailing that enters concentration basin in the described b step, when treating its concentration expressed in percentage by weight that is concentrated to 0.5-10%, pump per hour is not more than 15 cubic metres to inlet flow rate, carry out the extraction of free carbon in the centrifugal classifier between the pressure 0.2-0.4Mpa, the free carbon that extracts dehydration warehouse-in; Be transported in the filter press and dewater extracting mine tailing behind the free carbon, the mud cake of extrusion carry out the extraction of zinc or deliver to the cement plant, brick field is handled.
4. according to claim 1 or the 2 or 3 described processes of extracting iron, carbon from gas mud, it is characterized in that: the water after described each step process recycles.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007100616403A CN100546723C (en) | 2007-03-29 | 2007-03-29 | A kind of process of from gas mud, extracting iron, carbon |
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| CNB2007100616403A CN100546723C (en) | 2007-03-29 | 2007-03-29 | A kind of process of from gas mud, extracting iron, carbon |
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| CN100546723C true CN100546723C (en) | 2009-10-07 |
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| CN103623637B (en) * | 2013-12-16 | 2016-01-20 | 佛山市金凯地过滤设备有限公司 | A kind of press filteration system intelligent online inspection and control system |
| CN110592387A (en) * | 2019-10-29 | 2019-12-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for recovering zinc from high-zinc gas mud |
| CN115069026A (en) * | 2021-03-11 | 2022-09-20 | 中国科学院宁波材料技术与工程研究所 | Different particle size separator of nano-material |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1600022A (en) * | 1978-05-30 | 1981-10-14 | Univ Cardiff | Recovery of heavy metals from flue dusts |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1600022A (en) * | 1978-05-30 | 1981-10-14 | Univ Cardiff | Recovery of heavy metals from flue dusts |
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Granted publication date: 20091007 Termination date: 20120329 |