CN100333836C - Method for recovering iron ore concentrate from gas mud - Google Patents
Method for recovering iron ore concentrate from gas mud Download PDFInfo
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- CN100333836C CN100333836C CNB011130482A CN01113048A CN100333836C CN 100333836 C CN100333836 C CN 100333836C CN B011130482 A CNB011130482 A CN B011130482A CN 01113048 A CN01113048 A CN 01113048A CN 100333836 C CN100333836 C CN 100333836C
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- Prior art keywords
- iron ore
- ore concentrate
- intensity magnetic
- gas mud
- enters
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 71
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 35
- 239000012141 concentrate Substances 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000007885 magnetic separation Methods 0.000 claims abstract description 17
- 239000006148 magnetic separator Substances 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 230000005307 ferromagnetism Effects 0.000 claims description 7
- 238000011084 recovery Methods 0.000 claims description 7
- 239000012535 impurity Substances 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 6
- 238000004064 recycling Methods 0.000 claims description 5
- 239000012065 filter cake Substances 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 239000013055 pulp slurry Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 230000008719 thickening Effects 0.000 claims description 3
- 239000011701 zinc Substances 0.000 abstract description 16
- 229910052725 zinc Inorganic materials 0.000 abstract description 16
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 15
- 239000000428 dust Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 230000005285 magnetism related processes and functions Effects 0.000 abstract 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910001608 iron mineral Inorganic materials 0.000 description 3
- 239000002956 ash Substances 0.000 description 2
- 239000003610 charcoal Substances 0.000 description 2
- 239000003034 coal gas Substances 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 238000005202 decontamination Methods 0.000 description 1
- 230000003588 decontaminative effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000012716 precipitator Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to a method for recovering iron-containing dust, which is characterized in that firstly, gas mud is subjected to low-intensity magnetic separation, then tailings selected from the gas mud are subjected to high-intensity magnetic separation, and iron ore concentrate obtained by twice magnetic separation is recycled. Because the weak magnetic-strong magnetic process is adopted to recover the iron ore concentrate from the low-zinc gas mud, the iron ore in the blast furnace gas mud can be effectively recycled, the iron grade is improved, the effect of reducing harmful elements such as lead and zinc can be achieved, and the elements such as lead and zinc in the tailings can be enriched to a certain grade and then comprehensively utilized. Solves the problem of environmental pollution caused by the gas mud.
Description
The present invention relates to a kind of method that reclaims iron dust containing, particularly adopt weak magnetic---the method for iron ore concentrate in the technology recovery blast furnace gas mud of high intensity magnetic separation.
Blast furnace gas mud is byproduct---the flue dust of coal gas of discharging during blast furnace is produced, by the dirt mud after the water washing.After general employing gravitational precipitator was removed coarse fraction stove dirt earlier, half purified gas was through wet type coal gas purging system, and wherein fine fraction stove dirt forms slurries with water, through precipitation and filtration, slough most of moisture, become the gas mud filter cake, allocate in the sintering feed again and use.But owing to contain harmful element such as zinc in the gas mud, recycling back produces deposition, and content raises, and causes molten coalescent knurl in blast furnace, influences the life-span and the production operation of blast furnace.Therefore, general enterprise all abandons as refuse, has both taken a large amount of soils, and contaminated environment is also wasted a large amount of iron, zinc, charcoal resource again.At present, Chinese patent CN1063429A discloses a kind of " gas mud, mixture of fly ash comprehensive recovery system ", handle gas mud, mixture of fly ash with magnetic, reselecting method (thick, smart, sweep), there is the technological process complexity, treating capacity is little, water consumption is big, tailings grade height, the low deficiency that waits of the rate of recovery.
It is simple to the purpose of this invention is to provide a kind of technology, reduced investment, stable operation, tailings grade is low, ferrous metal rate of recovery height by the iron mineral in the physical method recovery blast furnace gas mud, has reduced the method that reclaims iron ore concentrate from gas mud of the content of objectionable impurities zinc simultaneously.
For achieving the above object, the technical solution that the present invention proposes is: reclaim the method for iron ore concentrate from low zinc gas mud, at first gas mud is carried out low intensity magnetic separation, the mine tailing to its low intensity magnetic separation carries out high intensity magnetic separation again, and the iron ore concentrate that magneticly elects for twice is recycled.The steps include: that dried gas mud (ash) is added water makes the slurries of 15%-20% weight concentration (slurries of discharging from blast furnace in the produced on-site can directly use), enter the agitator from dispenser, stirred 25-35 minute, pulp slurry after the stirring enters the low intensity magnetic separation machine by pipeline, and magnetic field intensity is at 120-160KA/m; Select wherein ferromagnetism iron ore concentrate, the ferromagnetism iron ore concentrate that control enters intensity magnetic separator is no more than 5%, and the mine tailing of low intensity magnetic separation is screened out decontamination with removing the gred, and the ore pulp of removing behind the impurity enters intensity magnetic separator, and magnetic field intensity is controlled at 620-800KA/m; Together enter inspissator after the iron ore concentrate of intensity magnetic separator and low intensity magnetic separation machine merges and carry out thickening, the iron ore concentrate after concentrating enters filter and filters, and obtaining filter cake is available iron ore concentrate.The mine tailing of intensity magnetic separator enters inspissator, and the mine tailing after concentrating obtains tailing cake through filter, and the overflow water of inspissator and filter can be all recycling or be effluxed.
The invention has the beneficial effects as follows: owing to adopt weak magnetic-strong magnetic technology from low zinc gas mud, to reclaim iron ore concentrate, useful iron mineral in not only can the effective recycling blast furnace gas mud, improve the iron grade, can also play harmful element effects such as reducing lead, zinc, and enrichment of element such as the lead in the mine tailing, zinc can be fully utilized after certain grade again.The present invention can be used for all iron containing metallurgical dust, and it is lower to be specially adapted to ferrous grade, contains harmful element such as low zinc again and the metallurgical dust that can't directly use, thereby has solved the pollution problem of gas mud to environment.
Description of drawings
Accompanying drawing is a process flow diagram of the present invention
Embodiment: in conjunction with the accompanying drawings technological process of the present invention is further elaborated, the gas mud of plum mountain blast furnace is adopted in enforcement of the present invention, and its TFe is 34.70%, wherein the ferromagnetism iron mineral accounts for 38.37%, the weak magnetism mineral account for 51.97%, contain zinc 6.70%, contain charcoal 25.87%.Dried gas mud (ash) is added the slurries that water is made the 15%-20% weight concentration, enter the agitator 2 from dispenser 1, stirred 25-35 minute, the pulp slurry after the stirring enters the weak magnetic cylinder formula magnetic separator 3 of Ф 400 * 300mm wet type by pipeline, and magnetic field intensity is at 120-160KA/m; Select wherein ferromagnetism iron ore concentrate, the ferromagnetism iron ore concentrate that control enters intensity magnetic separator is no more than 5%, and the mine tailing of low intensity magnetic separation removed impurity 8 with removing ballast screen 7, and remove the pulsating high gradient intensity magnetic separator 9 that ore pulp behind the impurity enters slon-100mm, magnetic field intensity is controlled at 620-800KA/m; The iron ore concentrate of intensity magnetic separator and low intensity magnetic separation machine together enters an inspissator 4 and carries out thickening, iron ore concentrate after concentrating enters a filter 5 and filters, obtaining filter cake is available iron ore concentrate 6, the mine tailing of intensity magnetic separator 9 enters inspissator 10 No. two, mine tailing after concentrating obtains tailing cake 12 through No. two filters 11, and the overflow water 13 of inspissator and filter can be all recycling or be effluxed.After process of the present invention was handled, the iron grade of iron ore concentrate brought up to 50.57% from 34.70%, has risen 15.87 percentage points, and climbing is 45.73%; Zinc content drops to 3.89% from 6.70%, has descended 2.81 percentage points, and rate of descent is 41.94%, and the dezincify rate is 66.20%.The iron grade drops to 7.95% in the mine tailing, and the rate of recovery of last ferrous metal reaches 91.47%, because of zinc content in the mine tailing is enriched to 11.91%, zinc content＞8% also can reclaim zinc once more, and the mine tailing of discharge can be used as the auxiliary material of producing cement, brick and tile, solve environmental pollution, saved the soil.
Claims (1)
1, from gas mud, reclaim the method for iron ore concentrate, adopt full magnetic method to reclaim, at first gas mud is carried out low intensity magnetic separation, again its mine tailing of selecting is carried out high intensity magnetic separation, the iron ore concentrate that magneticly elects for twice is recycled, it is characterized in that: the processing step of recovery is: dried gas mud or ash are added the slurries that water is made the 15%-20% weight concentration, the slurries of discharging from blast furnace in the produced on-site can directly use, enter the agitator [2] from dispenser [1], stirred 25-35 minute, pulp slurry after the stirring enters low intensity magnetic separation machine [3] by pipeline, and magnetic field intensity is at 120-160KA/m; Select wherein ferromagnetism iron ore concentrate, the ferromagnetism iron ore concentrate that control enters intensity magnetic separator is no more than 5%, and the mine tailing of low intensity magnetic separation removed impurity [8] with removing ballast screen [7], the ore pulp of removing behind the impurity enters intensity magnetic separator [9], magnetic field intensity is controlled at 620-800KA/m, the iron ore concentrate of intensity magnetic separator and low intensity magnetic separation machine together enters an inspissator [4] and carries out thickening, iron ore concentrate after concentrating enters a filter [5] and filters, obtaining filter cake is available iron ore concentrate [6], the mine tailing of intensity magnetic separator [9] enters No. two inspissators [10], mine tailing after concentrating obtains tailing cake [12] through No. two filters [11], and the overflow water of inspissator and filter [13] can be all recycling or be effluxed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011130482A CN100333836C (en) | 2001-06-01 | 2001-06-01 | Method for recovering iron ore concentrate from gas mud |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011130482A CN100333836C (en) | 2001-06-01 | 2001-06-01 | Method for recovering iron ore concentrate from gas mud |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1389303A CN1389303A (en) | 2003-01-08 |
| CN100333836C true CN100333836C (en) | 2007-08-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011130482A Expired - Fee Related CN100333836C (en) | 2001-06-01 | 2001-06-01 | Method for recovering iron ore concentrate from gas mud |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100333836C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012065458A1 (en) * | 2010-11-16 | 2012-05-24 | 山东乾舜矿冶科技股份有限公司 | Recycling method for iron-making blast furnace gas ash |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1301806C (en) * | 2003-06-17 | 2007-02-28 | 唐山钢铁股份有限公司 | Technique for separating iron from blast furnace gas mire and specified magnetic separator |
| CN100446866C (en) * | 2003-12-26 | 2008-12-31 | 宝钢集团上海梅山有限公司 | Method for recovering iron concentrate from blast furnace dust |
| BRPI0908735A2 (en) * | 2008-08-30 | 2015-07-28 | Tata Steel Ltd | Method for the production of iron ore concentrates. |
| CN102218368A (en) * | 2011-03-15 | 2011-10-19 | 鞍钢集团矿业公司 | Process for concentrating and filtering magnetite concentrate |
| CN102747228A (en) * | 2012-07-18 | 2012-10-24 | 云南昆欧科技有限责任公司 | Method for recycling valuable elements from blast furnace gas mud |
| CN110947516A (en) * | 2019-12-21 | 2020-04-03 | 宝钢集团新疆八一钢铁有限公司 | Zinc reduction method for iron ore concentrate |
| CN112458295A (en) * | 2020-10-28 | 2021-03-09 | 赣州金环磁选设备有限公司 | Efficient mineral processing method for recycling iron blast furnace ash |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3632661A1 (en) * | 1986-09-26 | 1988-04-07 | Kupczik Guenter | Process for treating contaminated silt and plant for carrying out this process |
| CN1034682A (en) * | 1987-12-14 | 1989-08-16 | 上海冶金技术开发研究中心 | Selected and the nodulizing technology of pyrite cinder |
| WO1990003856A1 (en) * | 1988-10-13 | 1990-04-19 | Leo Schwyter Ag | Process and device for processing slag and other combustion residues from waste incineration plants |
| CN1063429A (en) * | 1991-12-12 | 1992-08-12 | 鞍山钢铁公司 | Gas mud, mixture of fly ash comprehensive recovery system |
| CN1147425A (en) * | 1996-05-07 | 1997-04-16 | 高安禄 | Wet magnetic iron powder separating process for steel smelting sludge |
-
2001
- 2001-06-01 CN CNB011130482A patent/CN100333836C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3632661A1 (en) * | 1986-09-26 | 1988-04-07 | Kupczik Guenter | Process for treating contaminated silt and plant for carrying out this process |
| CN1034682A (en) * | 1987-12-14 | 1989-08-16 | 上海冶金技术开发研究中心 | Selected and the nodulizing technology of pyrite cinder |
| WO1990003856A1 (en) * | 1988-10-13 | 1990-04-19 | Leo Schwyter Ag | Process and device for processing slag and other combustion residues from waste incineration plants |
| CN1063429A (en) * | 1991-12-12 | 1992-08-12 | 鞍山钢铁公司 | Gas mud, mixture of fly ash comprehensive recovery system |
| CN1147425A (en) * | 1996-05-07 | 1997-04-16 | 高安禄 | Wet magnetic iron powder separating process for steel smelting sludge |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012065458A1 (en) * | 2010-11-16 | 2012-05-24 | 山东乾舜矿冶科技股份有限公司 | Recycling method for iron-making blast furnace gas ash |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1389303A (en) | 2003-01-08 |
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Granted publication date: 20070829 Termination date: 20100601 |