CN107267747A - The method for promoting chromium-bearing sludge dispersed in agglomeration for iron mine material - Google Patents
The method for promoting chromium-bearing sludge dispersed in agglomeration for iron mine material Download PDFInfo
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- CN107267747A CN107267747A CN201710469352.5A CN201710469352A CN107267747A CN 107267747 A CN107267747 A CN 107267747A CN 201710469352 A CN201710469352 A CN 201710469352A CN 107267747 A CN107267747 A CN 107267747A
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- chromium
- bearing sludge
- sintering
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
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- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
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- Organic Chemistry (AREA)
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- Treatment Of Sludge (AREA)
Abstract
The invention discloses a kind of method for promoting chromium-bearing sludge dispersed in agglomeration for iron mine material, comprise the following steps：1) chromium-bearing sludge is mixed with raw materials for sintering by 1: 5~40 part by weight；2) abundant batch mixing, obtains compound；3) compound is carried out rolling mixing under 50~500N mechanical shear stress effect, makes chromium-bearing sludge fully dispersed well mixed in compound；4) compound after rolling is sintered dispensing.The present invention processing after chromium-bearing sludge viscosity reduction, it is fully dispersed after can use belt-conveying, be sintered dispensing；Chromium-bearing sludge roll mixing by the present invention with raw materials for sintering under 50~500N mechanical shear stress effect, so that by the shearing force of raw materials for sintering in the good chromium-bearing sludge of sticky big, ductility, this shearing force make it that chromium-bearing sludge is fully dispersed and it is destructurized to be unlikely to itself, both improve shear efficiency simultaneously, the load of rolling apparatus is reduced again, makes to reduce viscosity again while chromium-bearing sludge is dispersed.
Description
Technical field
The present invention relates to solid waste resource recovery technology, chromium-bearing sludge is promoted in agglomeration for iron mine material in particular to one kind
Dispersed method.
Background technology
With progress, expanding economy and the increase of population of society, Chinese iron and steel enterprise emerges rapidly, causes to contain
Chrome waste water and waste residue are sharply increased.Dynamically updated the data according to national Pollutant source investigation, there is the major class industry 24 that waste containing chromium is produced
Individual, wherein the industry of 3 is followed successively by chemical industry, steel, leather before yield ranking, and wherein steel industry accounts for 43.5%.Steel row
The currently used method of industry chromate waste water mainly has intermediate processing, membrane separation process, bioremediation, solvent extraction, electricity
Solution, electrodeposition process, absorption method and ion-exchange-resin process etc..Wherein, in chromate waste water processing procedure, 70~90% metal member
Element is transferred in sludge by adsorbing or precipitating.
Chromium-bearing sludge is because containing Cr VI, toxicity is larger, directly threatens human health and ecological environment.At present, to containing
The processing of chromium sludge is mainly started with terms of two：One is harmless treatment, and two be recycling treatment.
Filled after mainly chromium-bearing sludge is detoxified in terms of harmless treatment, because it contains harmful substance, at it
There is processing cost height, and cause the shortcoming of the wasting of resources to tens times in several times higher than general solid waste of reason expense.
In terms of recycling treatment, chromium-bearing sludge is high due to moisture content, and viscosity is big, larger using difficulty, exists to be dehydrated and subtracts
The problem of appearance.At present, a part after cement solidification or molten sintering processing using construction material is used for after innoxious, and some are looked forward to
These wastes are allowed some Building Material Companies to transport by industry oneself investment with hundreds of yuan per ton of price.Also some will contain chromium
Sludge mixes and carries out reduction roasting at high temperature using high temperature reduction method by a certain percentage with coal dust, is reduced into product insoluble
Material, can obtain value product such as burning glass colouring agent, ironmaking auxiliary material etc..In addition, iron and steel enterprise's generation is dirty containing chromium
Mud, can be incorporated sintered ironmaking process makes sexavalence lattice directly be reduced toxicity reduction in the presence of charcoal, and this is a kind of relatively good collection nothing
The utilization ways that evilization and recycling are integrated, Ji steel and Ma Gangdeng companies are located by the way of pelletizing, sintering, blast furnace process
Chromium-bearing sludge is managed, this measure realizes effective utilization of chromium-bearing sludge, obtains suitable profit, but due to its moisture content
High, viscosity is big, at present, is used in sintered ironmaking process and there are two big technical bottlenecks, one is equal in pipeline transportation and belt-conveying
There is bigger difficulty, it is impossible to directly participate in dispensing；Two be due to the big difficulties in dispersion in sintering feed of its viscosity.Two big bottleneck systems
About the sustainable development of this technical approach.
The content of the invention
, should present invention aim to provide a kind of method for promoting chromium-bearing sludge dispersed in agglomeration for iron mine material
Chromium-bearing sludge after method processing can directly be sintered dispensing, and the good dispersion in sintering feed.
To achieve the above object, the technical solution adopted by the present invention is：One kind promotes chromium-bearing sludge in agglomeration for iron mine material
Dispersed method, comprises the following steps：
1) chromium-bearing sludge is mixed with raw materials for sintering by 1: 5~40 part by weight；
2) abundant batch mixing, obtains compound；
3) compound is carried out rolling mixing under 50~500N mechanical shear stress effect, makes chromium-bearing sludge in compound
In it is fully dispersed well mixed；
4) compound after rolling is mixed with agglomeration for iron mine compound, is sintered dispensing.
Further, the step 1) in, the raw materials for sintering is porous material, and porosity is 10~50%, resistance to compression energy
Power ＞ 1000N.
Further, the step 1) in, the raw materials for sintering granularity ＜ 3mm, and granularity ＜ 1mm raw materials for sintering content
For 10~40%.
Further, the step 1) in, the raw materials for sintering water content is 0~1%.
Further, the step 4) in, when the compound after rolling is sintered into dispensing, adapted ratio ＜ 10%.
Further, the step 1) in, the raw materials for sintering is sinter return fine.
Further, the step 2) in, batch mixing is manually or mechanically fallen using herringbone, rhombus or triangular pile mode
Material mixing, batch mixing number of times ＞ 2 times.
Further, the step 1) in, the raw materials for sintering porosity be 40~50%, anti-pressure ability be 2000~
3000N。
Compared with prior art, the present invention has advantages below：
First, in the prior art, raw material needs to carry out dispensing using belt or spiral blanking equipment in sintering burden process,
Fully dispersed chromium-bearing sludge is not carried out and there is bigger difficulty in pipeline transportation and belt-conveying, it is impossible to directly participate in matching somebody with somebody
Material.And chromium-bearing sludge is handled using of the present invention in stock ground before dispensing is carried out, can after making its viscosity reduction fully dispersed
Using belt-conveying, dispensing is sintered.
Second, the present invention by chromium-bearing sludge and raw materials for sintering the progress under 50~500N mechanical shear stress effect roll it is mixed
Close, so that by the shearing force of raw materials for sintering in the good chromium-bearing sludge of sticky big, ductility, this shearing force to contain chromium
Sludge is fully dispersed and is unlikely to destructurized in itself, while both having improved shear efficiency, the negative of rolling apparatus is reduced again
Lotus, makes to reduce viscosity again while chromium-bearing sludge is dispersed.
Third, the raw materials for sintering that the present invention is used significantly reduces the water content of chromium-bearing sludge, so as to enter for porous material
One step reduces the viscosity of chromium-bearing sludge, and then further promotes its dispersed.
Fourth, the present invention proposes a kind of method for promoting chromium-bearing sludge dispersed in agglomeration for iron mine material, make to contain chromium
Sludge enters before sintered material is sintered dispensing again after stock ground is fully dispersed using means of the present invention in advance, and method is simply easy
OK, invest small, effect is good.
Brief description of the drawings
Fig. 1 is the state diagram before chromium-bearing sludge is mixed with raw materials for sintering.
Fig. 2 is the state diagram after chromium-bearing sludge is mixed with raw materials for sintering.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings, is easy to more clearly understand the present invention, but they
The present invention is not constituted and limited.
Once returning mine for being used in following examples is satisfied by following condition with secondary return mine：For not aqueous, granularity ＜ 3mm
(and the grade ratio of the 1mm containing ＜ is 10~40%), anti-pressure ability ＞ 1000N, porosity has certain water suction 10~50%
The porous material of ability.
Embodiment 1
1) chromium-bearing sludge is weighed with once returning mine by 1: 10 part by weight, mixed；
2) artificial batch turning mixing is carried out using triangular pile mode, batch mixing number of times is 3 times, stand-by after mixing；
3) mixed material is carried out in the presence of artificial roll rolling mixing, makes the fully dispersed mixing of solid waste containing chromium equal
After even, in 3% ratio be incorporated agglomeration for iron mine compound (including iron ore, fuel, flux and return mine) be sintered, sinter result
As shown in table 1, sintering deposit index is up to standard, meets production and application requirement.
Table 1
| Yield rate, % | Sintering velocity, mm/min | Usage factor, kg/m2h | Drum strength, % |
| 68.24 | 21.94 | 1.52 | 77.9 |
Embodiment 2
1) chromium-bearing sludge is weighed with once returning mine by 1: 10 part by weight, mixed；
2) artificial batch turning mixing is carried out using triangular pile mode, batch mixing number of times is 4 times, stand-by after mixing；
3) mixed material is carried out in the presence of rolling and mixing machine 500N mechanical shear stress rolling mixing, makes solid waste containing chromium
It is fully dispersed it is well mixed after, in 5% ratio be incorporated agglomeration for iron mine compound (including iron ore, fuel, flux and return mine) enter
Row sintering, as shown in table 2, sintering deposit index is up to standard, meets production and application requirement for sintering result.
Table 2
| Yield rate, % | Sintering velocity, mm/min | Usage factor, kg/m2h | Drum strength, % |
| 69.21 | 22.62 | 1.56 | 80.1 |
Embodiment 3
1) weigh chromium-bearing sludge by 1: 20 part by weight to return mine with secondary, mixed；
2) mechanical batch turning mixing is carried out using chevrons, batch mixing number of times is 2 times, stand-by after mixing；
3) mixed material is carried out in the presence of rolling and mixing machine 300N mechanical shear stress rolling mixing, makes solid waste containing chromium
It is fully dispersed it is well mixed after, in 6% ratio be incorporated agglomeration for iron mine compound (including iron ore, fuel, flux and return mine) enter
Row sintering, as shown in table 3, sintering deposit index is up to standard, meets production and application requirement for sintering result.
Table 3
| Yield rate, % | Sintering velocity, mm/min | Usage factor, kg/m2h | Drum strength, % |
| 68.97 | 22.03 | 1.53 | 79.8 |
Claims (8)
1. a kind of method for promoting chromium-bearing sludge dispersed in agglomeration for iron mine material, it is characterised in that：Comprise the following steps：
1) chromium-bearing sludge is mixed with raw materials for sintering by 1: 5~40 part by weight；
2) abundant batch mixing, obtains compound；
3) compound is carried out rolling mixing under 50~500N mechanical shear stress effect, chromium-bearing sludge is filled in compound
Divide dispersion mixing uniform；
4) compound after rolling is mixed with agglomeration for iron mine compound, is sintered dispensing.
2. the method according to claim 1 for promoting chromium-bearing sludge dispersed in agglomeration for iron mine material, it is characterised in that：
The step 1) in, the raw materials for sintering is porous material, and porosity is 10~50%, anti-pressure ability ＞ 1000N.
3. the method according to claim 1 for promoting chromium-bearing sludge dispersed in agglomeration for iron mine material, it is characterised in that：
The step 1) in, the raw materials for sintering granularity ＜ 3mm, and granularity ＜ 1mm raw materials for sintering content is 10~40%.
4. promoting chromium-bearing sludge method dispersed in agglomeration for iron mine material according to claim 1 or 2 or 3, it is special
Levy and be：The step 1) in, the raw materials for sintering water content is 0~1%.
5. promoting chromium-bearing sludge method dispersed in agglomeration for iron mine material according to claim 1 or 2 or 3, it is special
Levy and be：The step 4) in, when the compound after rolling is sintered into dispensing, adapted ratio ＜ 10%.
6. promoting chromium-bearing sludge method dispersed in agglomeration for iron mine material according to claim 1 or 2 or 3, it is special
Levy and be：The step 1) in, the raw materials for sintering is sinter return fine.
7. promoting chromium-bearing sludge method dispersed in agglomeration for iron mine material according to claim 1 or 2 or 3, it is special
Levy and be：The step 2) in, batch mixing carries out manually or mechanically batch turning using herringbone, rhombus or triangular pile mode and mixed, and mixes
Expect number of times ＞ 2 times.
8. promoting chromium-bearing sludge method dispersed in agglomeration for iron mine material according to claim 1 or 2 or 3, it is special
Levy and be：The step 1) in, the raw materials for sintering porosity is 40~50%, and anti-pressure ability is 2000~3000N.
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| CN201710469352.5A CN107267747B (en) | 2017-06-20 | 2017-06-20 | The method for promoting chromium-bearing sludge evenly dispersed in agglomeration for iron mine material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109136543A (en) * | 2018-11-17 | 2019-01-04 | 武钢集团昆明钢铁股份有限公司 | High mixture ratio magnetic iron ore sintering method |
Citations (6)
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|---|---|---|---|---|
| JPH0748634A (en) * | 1993-08-03 | 1995-02-21 | Sumitomo Metal Ind Ltd | Method of pretreatment of sintered raw material |
| CN1385255A (en) * | 2002-04-15 | 2002-12-18 | 湘潭钢铁集团有限公司 | Iron-containing mud and sintered return mine reuse method |
| CN101519722A (en) * | 2009-03-25 | 2009-09-02 | 韶关市曲江盛大工业物资有限公司 | Method for utilizing iron containing metallurgical dust |
| CN101713023A (en) * | 2009-11-24 | 2010-05-26 | 马鞍山钢铁股份有限公司 | Forming method for metallurgical industry dust and sludge containing hazardous elements for reduction technology |
| CN102212682A (en) * | 2011-05-25 | 2011-10-12 | 衡阳华菱钢管有限公司 | Treatment method for sintering oil-bearing graphite sludge in ingredient ore |
| CN104975169A (en) * | 2014-04-10 | 2015-10-14 | 鞍钢股份有限公司 | Method for improving air permeability of sintering mixture |
-
2017
- 2017-06-20 CN CN201710469352.5A patent/CN107267747B/en active Active
Patent Citations (6)
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|---|---|---|---|---|
| JPH0748634A (en) * | 1993-08-03 | 1995-02-21 | Sumitomo Metal Ind Ltd | Method of pretreatment of sintered raw material |
| CN1385255A (en) * | 2002-04-15 | 2002-12-18 | 湘潭钢铁集团有限公司 | Iron-containing mud and sintered return mine reuse method |
| CN101519722A (en) * | 2009-03-25 | 2009-09-02 | 韶关市曲江盛大工业物资有限公司 | Method for utilizing iron containing metallurgical dust |
| CN101713023A (en) * | 2009-11-24 | 2010-05-26 | 马鞍山钢铁股份有限公司 | Forming method for metallurgical industry dust and sludge containing hazardous elements for reduction technology |
| CN102212682A (en) * | 2011-05-25 | 2011-10-12 | 衡阳华菱钢管有限公司 | Treatment method for sintering oil-bearing graphite sludge in ingredient ore |
| CN104975169A (en) * | 2014-04-10 | 2015-10-14 | 鞍钢股份有限公司 | Method for improving air permeability of sintering mixture |
Non-Patent Citations (1)
| Title |
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| 黎燕华: "我国转炉污泥资源化技术研究与进展", 《金属矿山》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109136543A (en) * | 2018-11-17 | 2019-01-04 | 武钢集团昆明钢铁股份有限公司 | High mixture ratio magnetic iron ore sintering method |
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