CN103708563A - Method for producing iron oxide red from iron-based compound powder washing wastewater - Google Patents
Method for producing iron oxide red from iron-based compound powder washing wastewater Download PDFInfo
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- CN103708563A CN103708563A CN201310734480.XA CN201310734480A CN103708563A CN 103708563 A CN103708563 A CN 103708563A CN 201310734480 A CN201310734480 A CN 201310734480A CN 103708563 A CN103708563 A CN 103708563A
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Abstract
The invention provides a method for producing iron oxide red from iron-based compound powder washing wastewater, which is characterized by roasting precipitates after the wastewater is subjected to alkali treatment. According to the invention, the pollution of iron-containing waste liquid and waste residue to the environment is effectively prevented, wastes are changed into valuable substances, and the treatment cost of the iron-based powder waste liquid is lowered. The prepared iron oxide red is high in quality and ultrafine, the main grade of the product is no less than 95%, the sulfate content is no more than 0.02%, and the particle size D is no more than 3 mu m, thus ensuring that the iron oxide red has very high industrial use value.
Description
Technical field
The invention belongs to the production field of red iron oxide, particularly adopt iron-based composite powder to wash the method for powder waste water production red iron oxide.
Background technology
Iron-based composite powder production principle is to utilize the chemical replacement reaction that iron powder, copper-bath carry out under certain additive condition, in reaction process, can produce a large amount of containing high density iron, ferrous ion, the waste liquid of sulfate radical.
The processing of at present iron-based composite powder being washed to powder waste water is containing in the waste liquid of high density ferrous ion, to add lime in a large number what produce, lime reacts with the waste liquid of ferrous ion, generates throw out, through pressure filter press filtration, filter residue is toppled over landfill, and environment has been caused to serious destruction; Or by produce a large amount of containing high density ferrous ion waste liquid carry out successively Air Exposure, liquid feeding alkaline solution stirs, adds flocculation agent precipitation, through pressure filter press filtration, then filter residue is processed.
The method of processing at present a large amount of iron slags that produce in the production of iron-based composite powder, has affected environment, has wasted iron resources, has increased cost for wastewater treatment.
Summary of the invention
The object of the present invention is to provide a kind of waste residue that utilizes existing production iron-based composite powder to produce to produce the red method of high-quality superfine iron oxide.
The object of the invention is to realize by following measures:
With iron-based composite powder, wash a method for powder waste water production red iron oxide, it is characterized in that the precipitation of roasting after waste water described in alkaline purification.
In order to make to precipitate thorough decomposition, and improve the taste of red iron oxide, above-mentioned roasting maturing temperature 700-900 ℃, roasting time 70-100min; Preferably, temperature is 800 ℃, roasting time 80min.
In order to improve the quality of red iron oxide, as make it be bright red shape, above-mentioned roasting passes into air or oxygen simultaneously, uses 200-300w blower fan when employing passes into air.
In order to improve product quality and production efficiency, after above-mentioned roasting, also comprise elutriation.Preferably, eluriate and adopt filtration washing all-in-one to eluriate press filtration 1-3 hour.
In order to improve product fineness and yield rate, and improve Working environment, after above-mentioned elutriation, also comprise and crushing and screening; Preferably, adopt graded impact mill to carry out.
In order thoroughly to remove the material of the contaminate environment in waste water, waste water is to add that excessive sodium hydrate is 9 ~ 10 at pH, pass into air under normal temperature described in above-mentioned alkaline purification, and aeration 2 ~ 3 hours, becomes cake by the precipitation press filtration obtaining.Slag is pressed in roasting again.
Above-mentioned method of washing powder waste water production red iron oxide with iron-based composite powder, comprises the following steps:
In washing powder waste water, production iron-based composite powder adds excessive sodium hydrate, at pH, be to pass into air under 9 ~ 10 normal temperature, aeration 2 ~ 3 hours, the precipitation press filtration obtaining is become to cake, by pressing slag to join in tubular type rotary calcining stove, adopt 200w blower fan to pass into the roasting that air carries out 700-900 ℃, roasting time 70-100min; With crusher, sesame seed cake is carried out to fragmentation, particle size after cracking-40 order accounts for more than 90% to+100 orders, and this is that it is bad that macrobead red iron oxide is eluriated effect in order to prevent that small-particle red iron oxide powder from being fallen by a large amount of elutriations in elutriation process; With filtration washing all-in-one, eluriate press filtration 1-3 hour.With paddle formula drying machine, carry out 100-200 ℃ of oven dry, time 70-100min; Dry and expect that joining graded impact mill carries out cracking and sorting.
Beneficial effect
1. it is red that the present invention makes high-quality superfine iron oxide, main grade >=95% of product, and sulphate content≤0.02%, granularity D97≤3 μ m, has very high industrial application and is worth.
2. the invention provides a kind of method of utilizing industrial effluent production red iron oxide, stopped iron content waste liquid, the pollution of waste residue to environment, and turned waste into wealth, reduced iron-based powder treatment cost of waste liquor, solved the sorrow of the consequence of iron-based powder scale operation.Waste water after processing, without precipitation, does not almost have iron ion residual, and pH reaches neutrality, can directly discharge or again as water of productive use, recycle.
Embodiment
Below in conjunction with embodiment, the present invention is elaborated, but not only for so.For a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Embodiment 1
A kind of method of washing powder waste water production red iron oxide with iron-based composite powder, in washing powder waste water, production iron-based composite powder adds excessive sodium hydrate, at pH, be to pass into air under 9 ~ 10 normal temperature, aeration 2 ~ 3 hours, the precipitation press filtration obtaining is become to cake, by pressing slag to join in tubular type rotary calcining stove, carry out the roasting of 600 ℃, respectively roasting 40min, 60min, 80min, 90min, 120min; With crusher, sesame seed cake is carried out to fragmentation, particle size after cracking-40 order accounts for more than 90% to+100 orders; With whizzer, eluriate press filtration 3 hours; With paddle formula drying machine, carry out 100-200 ℃ of oven dry, time 70-100min; Dry and expect that joining crusher carries out cracking and sorting.
Main taste, vitriol carry out analytical test by national standard, and granularity is pressed laser particle analyzer and measured.
Product is the red shape of a little, and main taste is respectively 88.36%, 91.28%, 93.21%, 94.43%, 93.70%; Sulphate content 0.018%, full granularity 150 orders of crossing ,-325 order yield rates 50%, can produce continuously.Waste water after processing, without precipitation, does not almost have iron ion residual, and pH reaches neutrality, can directly discharge or again as water of productive use, recycle.
Embodiment 2
A kind of method of washing powder waste water production red iron oxide with iron-based composite powder, in washing powder waste water, production iron-based composite powder adds excessive sodium hydrate, at pH, be to pass into air under 9 ~ 10 normal temperature, aeration 2 ~ 3 hours, the precipitation press filtration obtaining is become to cake, by pressing slag to join in tubular type rotary calcining stove, carry out the roasting of 700 ℃, with the blower fan of 100w, pass into air, respectively roasting 40min, 60min, 80min, 90min, 120min; With crusher, sesame seed cake is carried out to fragmentation, particle size after cracking-40 order accounts for more than 90% to+100 orders; With suction filtration machine, eluriate press filtration 4 hours; With paddle formula drying machine, carry out 100-200 ℃ of oven dry, time 70-100min; Dry and expect that joining ball mill carries out cracking and sorting.
Main taste, vitriol carry out analytical test by national standard, and granularity is pressed laser particle analyzer and measured.
The product surface shape that takes on a red color, the inside is black powder, main taste is respectively 88.48%, 92.72%, 93.21%, 94.73%, 93.88%; Sulphate content 0.016%, full granularity 150 orders of crossing ,-325 order yield rates 100%, can produce continuously.Waste water after processing, without precipitation, does not almost have iron ion residual, and pH reaches neutrality, can directly discharge or again as water of productive use, recycle.
Embodiment 3
A kind of method of washing powder waste water production red iron oxide with iron-based composite powder, in washing powder waste water, production iron-based composite powder adds excessive sodium hydrate, at pH, be to pass into air under 9 ~ 10 normal temperature, aeration 2 ~ 3 hours, the precipitation press filtration obtaining is become to cake, by pressing slag to join in tubular type rotary calcining stove, carry out the roasting of 800 ℃, with the blower fan of 200w, pass into air, respectively roasting 40min, 60min, 80min, 90min, 120min; With crusher, sesame seed cake is carried out to fragmentation, particle size after cracking-40 order accounts for more than 90% to+100 orders; With filtration washing all-in-one, eluriate press filtration 1-3 hour; With paddle formula drying machine, carry out 100-200 ℃ of oven dry, time 70-100min; Dry and expect that joining graded impact mill carries out cracking and sorting.
Main taste, vitriol carry out analytical test by national standard, and granularity is pressed laser particle analyzer and measured.
Product is bright red shape, and main taste is respectively 94.28%, 95.05%, 95.58%, 95.23%, 95.04%; Sulphate content 0.015%, full granularity 800 orders of crossing ,-325 order yield rates 100%, can produce continuously.Waste water after processing, without precipitation, does not almost have iron ion residual, and pH reaches neutrality, can directly discharge or again as water of productive use, recycle.
Embodiment 4
A kind of method of washing powder waste water production red iron oxide with iron-based composite powder, in washing powder waste water, production iron-based composite powder adds excessive sodium hydrate, at pH, be to pass into air under 9 ~ 10 normal temperature, aeration 2 ~ 3 hours, the precipitation press filtration obtaining is become to cake, by pressing slag to join in tubular type rotary calcining stove, carry out the roasting of 800 ℃, with the blower fan of 300w, pass into air, roasting time 80min; With crusher, sesame seed cake is carried out to fragmentation, particle size after cracking-40 order accounts for more than 90% to+100 orders; With filtration washing all-in-one, eluriate press filtration 1-3 hour; With paddle formula drying machine, carry out 100-200 ℃ of oven dry, time 70-100min; Dry and expect that joining graded impact mill carries out cracking and sorting.
Main taste, vitriol carry out analytical test by national standard, and granularity is pressed laser particle analyzer and measured.
The main grade of red iron oxide is 96.3%, sulphate content 0.010%, and granularity D97 is 2.5um.Waste water after processing, without precipitation, does not almost have iron ion residual, and pH reaches neutrality, can directly discharge or again as water of productive use, recycle.
Claims (8)
1. with iron-based composite powder, wash a method for powder waste water production red iron oxide, it is characterized in that the precipitation of roasting after waste water described in alkaline purification.
2. method of washing powder waste water production red iron oxide with iron-based composite powder as claimed in claim 1, described maturing temperature 700-900 ℃, roasting time 70-100min.
3. method of washing powder waste water production red iron oxide with iron-based composite powder as claimed in claim 2, maturing temperature is 800 ℃, roasting time 80min.
4. as described in claim 1,2 or 3, with iron-based composite powder, wash the method for powder waste water production red iron oxide, for described roasting passes into air or oxygen simultaneously, adopt and while passing into air, use 200-300w blower fan.
5. as described in as arbitrary in claim 1-4, with iron-based composite powder, wash the method for powder waste water production red iron oxide, also comprise elutriation after described roasting, described elutriation adopts filtration washing all-in-one to eluriate press filtration 1-3 hour.
6. method of washing powder waste water production red iron oxide with iron-based composite powder as claimed in claim 5, also comprises and crushing and screening after described elutriation, described in crush and screen and adopt graded impact mill to carry out.
7. as described in as arbitrary in claim 1-6, with iron-based composite powder, wash the method for powder waste water production red iron oxide, described in described alkaline purification, waste water is to add that excessive sodium hydrate is 9 ~ 10 at pH, pass into air under normal temperature, aeration 2 ~ 3 hours, becomes cake by the precipitation press filtration obtaining.
8. method of washing powder waste water production red iron oxide with iron-based composite powder as claimed in claim 1, comprise the following steps: in production iron-based composite powder is washed powder waste water, add excessive sodium hydrate, at pH, be to pass into air under 9 ~ 10 normal temperature, aeration 2 ~ 3 hours, the precipitation press filtration obtaining is become to cake, by pressing slag to join in tubular type rotary calcining stove, adopt 200w blower fan to pass into the roasting that air carries out 700-900 ℃, roasting time 70-100min; With crusher, sesame seed cake is carried out to fragmentation, particle size after cracking-40 order accounts for more than 90% to+100 orders; With filtration washing all-in-one, eluriate press filtration 1-3 hour; With paddle formula drying machine, carry out 100-200 ℃ of oven dry, time 70-100min; Dry and expect that joining graded impact mill carries out cracking and sorting.
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| CN201310734480.XA CN103708563A (en) | 2013-12-27 | 2013-12-27 | Method for producing iron oxide red from iron-based compound powder washing wastewater |
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| CN201310734480.XA CN103708563A (en) | 2013-12-27 | 2013-12-27 | Method for producing iron oxide red from iron-based compound powder washing wastewater |
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| CN103708563A true CN103708563A (en) | 2014-04-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110170646A (en) * | 2019-07-01 | 2019-08-27 | 重庆有研重冶新材料有限公司 | Superfine iron powder and its production method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1108618A (en) * | 1994-03-16 | 1995-09-20 | 南京化学工业(集团)公司研究院 | Method for production of high-content ferric oxide red colorant from iron-contained industrial burned dregs |
| CN1762832A (en) * | 2005-09-12 | 2006-04-26 | 鄂州市长润农业生态技术有限公司 | Potash feldspar deferrization concentrating and iron-oxide red production method |
| CN101607741A (en) * | 2008-06-19 | 2009-12-23 | 张晓东 | Utilize byproduct ferrous sulfate of titanium dioxide to prepare the method for red iron oxide |
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2013
- 2013-12-27 CN CN201310734480.XA patent/CN103708563A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1108618A (en) * | 1994-03-16 | 1995-09-20 | 南京化学工业(集团)公司研究院 | Method for production of high-content ferric oxide red colorant from iron-contained industrial burned dregs |
| CN1762832A (en) * | 2005-09-12 | 2006-04-26 | 鄂州市长润农业生态技术有限公司 | Potash feldspar deferrization concentrating and iron-oxide red production method |
| CN101607741A (en) * | 2008-06-19 | 2009-12-23 | 张晓东 | Utilize byproduct ferrous sulfate of titanium dioxide to prepare the method for red iron oxide |
Non-Patent Citations (1)
| Title |
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| 宋学周等: "《废水 废气 固体废物专项治理与综合利用实务全书》", 30 November 2000, 中国科学技术出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110170646A (en) * | 2019-07-01 | 2019-08-27 | 重庆有研重冶新材料有限公司 | Superfine iron powder and its production method |
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Effective date of registration: 20170116 Address after: 401431 Sanjiang street, Chongqing District, Qijiang liberated area Applicant after: Chongqing You Yanchongye novel material company limited Address before: 401431 Sanjiang street, Qijiang, Chongqing Applicant before: Chongqing Huahao Smelting Co., Ltd. |
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Application publication date: 20140409 |