CN102527503B - Ore dressing system and method for recycling tailings containing iron - Google Patents
Ore dressing system and method for recycling tailings containing iron Download PDFInfo
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- CN102527503B CN102527503B CN201210005636.6A CN201210005636A CN102527503B CN 102527503 B CN102527503 B CN 102527503B CN 201210005636 A CN201210005636 A CN 201210005636A CN 102527503 B CN102527503 B CN 102527503B
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 103
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000004064 recycling Methods 0.000 title abstract 3
- 239000000463 material Substances 0.000 claims abstract description 134
- 239000006148 magnetic separator Substances 0.000 claims abstract description 37
- 238000000227 grinding Methods 0.000 claims abstract description 12
- 238000001035 drying Methods 0.000 claims abstract description 5
- 239000012141 concentrate Substances 0.000 claims description 18
- 230000008929 regeneration Effects 0.000 claims description 16
- 238000011069 regeneration method Methods 0.000 claims description 16
- 238000007885 magnetic separation Methods 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 230000018044 dehydration Effects 0.000 claims description 7
- 238000006297 dehydration reaction Methods 0.000 claims description 7
- 239000002912 waste gas Substances 0.000 claims description 7
- 230000005415 magnetization Effects 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 4
- 239000004566 building material Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 239000002562 thickening agent Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 5
- 229910052500 inorganic mineral Inorganic materials 0.000 description 5
- 239000011707 mineral Substances 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 229910021646 siderite Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 2
- 229910001608 iron mineral Inorganic materials 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- DQMUQFUTDWISTM-UHFFFAOYSA-N O.[O-2].[Fe+2].[Fe+2].[O-2] Chemical compound O.[O-2].[Fe+2].[Fe+2].[O-2] DQMUQFUTDWISTM-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
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Abstract
The invention discloses an ore dressing system for recycling tailings containing iron, comprising a concentrating tank, a dewatering machine, a drying machine, a rotary kiln, an ore grinding machine, a grading machine, a one-pass magnetic separator and a two-pass magnetic separator, wherein a concentrating output port of the concentrating tank is connected with a material inlet of the dewatering machine; a material outlet of the dewatering machine is connected to a material inlet of the drying machine; a material outlet of the drying machine is connected to a material inlet of the rotary kiln; a material outlet of the rotary kiln is connected to a material inlet of the ore grinding machine; a material outlet of the ore grinding machine is connected to a material inlet of the grading machine; a material outlet of the grading machine is connected to a material inlet of the one-pass magnetic separator; and a material outlet of the one-pass magnetic separator is connected to a material inlet of the two-pass magnetic separator. The invention also discloses an ore dressing method for recycling the tailings containing the iron. The invention can realize ore dressing without tailings, has the characteristics of simple process structure, high benefit and environmentally-friendly effect, and leads the iron ore and tailings which can not be utilized to be comprehensively utilized.
Description
Technical field
The present invention relates to separation method and the comprehensive utilization of resources of mineral, special relevant with ore-sorting system and the method for iron-containing tailing regeneration.
Technical background
Along with the fast development of China's economy, the demand of iron and steel is increased day by day, the annual iron and steel output of China reaches more than 600,000,000 tons.Domestic iron ore resource can not meet the development of China's steel and iron industry, and annual Ore Imported reaches more than 60%.Ended for the end of the year 2006, the identified iron ore deposit reserves of China are more than 600 hundred million tons, wherein select ferric oxide ore resource to have nearly 10,000,000,000 tons take bloodstone, siderite, limonite as main poor assorted difficulty.In decades, due to the restriction of technique of preparing level, the bloodstone of siderite, limonite and fine-grained disseminated grain in dressing Production Process is all dropped in Tailings Dam, has stored up tens tons, and this part resource of tailings is also increasing continuously.Adopt suitable these resource of tailings of method high efficiente callback, this will alleviate China's iron ore deposit supply shortage situation effectively.
Summary of the invention
The object of the present invention is to provide a kind of ore-sorting system and method for iron-containing tailing regeneration, to realize the comprehensive utilization of iron ore deposit.
In order to reach above-mentioned purpose, solution of the present invention is:
An ore-sorting system for iron-containing tailing regeneration, comprises concentration tank, dewaterer, dryer, rotary kiln, ore mill, grader, one magnetic separator He Er road magnetic separator; Concentration tank has iron-containing tailing material input port and concentrated delivery outlet; Dewaterer has material inlet and material outlet; Dryer has material inlet and material outlet; Rotary kiln has material inlet and material outlet, Waste gas outlet; Ore mill has material inlet and material outlet; Grader has material inlet and material outlet; One magnetic separator has material inlet, material outlet and mine tailing outlet; Two road magnetic separators have material inlet, iron ore concentrate outlet and mine tailing outlet; The concentrated delivery outlet of concentration tank is connected to the material inlet of dewaterer, the material outlet of dewaterer is connected to the material inlet of dryer, the material outlet of dryer is connected to the material inlet of rotary kiln, the material outlet of rotary kiln is connected to the material inlet of ore mill, the material outlet of ore mill is connected to the material inlet of grader, the material outlet of grader is connected to the material inlet of one magnetic separator, and the material outlet of one magnetic separator is connected to the material inlet of two road magnetic separators.
The material outlet of described rotary kiln is connected to ore storage bin, regulates through ore storage bin outlet multigraph press the material inlet that enters ore mill.
A beneficiation method for iron-containing tailing regeneration, its step is as follows:
The first step concentrates iron-containing tailing material in thickener;
Second step, sends the material after concentrated into dewaterer and dewaters;
The 3rd step, sends the material after dehydration into dryer and dries;
The 4th step, by the material after drying, in the magnetization of revolution roasting in kilns, waste gas reclaims through dedusting;
The 5th step is carried out grinding by the material after roasting magnetization in ore mill;
The 6th step, carries out classification processing by the material after grinding at grader, meets in mass transport to one magnetic separator of magnetic separation standard;
The 7th step, roughly selects the material after classification at one magnetic separator, mine tailing is discharged;
The 8th step, then the ore dressing Jing Er road magnetic separator after one magnetic separation is scanned, obtaining iron ore concentrate, mine tailing is discharged.
In the described first step, after concentrating, by weight percentage, water content is 40%～60%.
In described second step, after dehydration, by weight percentage, water content is 18～20%.
In described the 3rd step, after oven dry, by weight percentage, water content is below 2%.
In described the 4th step, rotary kiln baking temperature is 700～950 ℃, time 30～50min.
In described the 5th step, the order number of ore mill grinding accounts for 85% for-325 orders.
In described the 7th step and the 8th step, the magnetic field intensity of magnetic separation is 1200～1600 oersteds.
In described the 7th step and the 8th step, the mine tailing of magnetic separation is after dewatering and filtering, as building materials raw material.
Adopt after such scheme, the present invention be directed to and in magnetic iron ore, contain bloodstone, limonite, the iron-containing tailings such as siderite compared with weakly magnetic mineral or do not have magnetic mineral, its grade is low, many and the embedding order fine size of impurity, with physical method be difficult to separate with gangue mineral and the rate of recovery low, the present invention is by concentrating iron-containing tailing, dehydration, dry, rotary kiln baking, by red iron, limonite, the iron-containing tailing such as sparring and speculum iron is converted into tri-iron tetroxide from di-iron trioxide, recycle the effective separation of iron mineral of common magnetic separation and other gangue mineral, acquisition can be used as the iron ore concentrate of iron-smelting raw material and can be used as the tail ash of cement compound etc., resource is comprehensively reclaimed, until can not recycle.
In a word, the present invention can accomplish without mine tailing ore dressing, has that flowage structure is simple, a high efficiency, eco-friendly feature, and not available iron ore mine resource is fully utilized.
Accompanying drawing explanation
Fig. 1 is schematic flow sheet of the present invention.
The specific embodiment
As shown in Figure 1, the system of a kind of iron-containing tailing regeneration that the present invention discloses, comprises concentration tank 1, dewaterer 2, dryer 3, rotary kiln 4, ore mill 5, grader 6, one magnetic separator 7 He Er road magnetic separator 8.
Dewaterer 2 has material inlet 21 and material outlet 22.
Rotary kiln 4 has material inlet 41 and material outlet 42, Waste gas outlet 43.
Ore mill 5 has material inlet 51 and material outlet 52.
One magnetic separator 7 has material inlet 71, material outlet 72 and mine tailing outlet 73.
Two road magnetic separators 8 have material inlet 81, iron ore concentrate outlet 82 and mine tailing outlet 83.
The concentrated delivery outlet 12 of concentration tank 1 is connected to the concentrated material inlet 21 of dewaterer 2, the material outlet 22 of dewaterer 2 is connected to the material inlet 31 of dryer 3, the material outlet 32 of dryer 3 is connected to the material inlet 41 of rotary kiln 4, the material outlet 42 of rotary kiln 4 is connected to ore storage bin, regulate through ore storage bin outlet multigraph press the material inlet 51 that enters ore mill 5, the material outlet 52 of ore mill 5 is connected to the material inlet 61 of grader 6, the material outlet 62 of grader 6 is connected to the material inlet 71 of one magnetic separator 7, the material outlet 72 of one magnetic separator 7 is connected to the material inlet 81 of two road magnetic separators 8.
Specifically add man-hour, iron-containing tailing material is delivered in thickener 1 and concentrated by iron-containing tailing material input port 11, after concentrating, by weight percentage, water content is 40%～60%; Again the material after concentrated is entered in dewaterer 2 through concentrated delivery outlet 12 and concentrated material inlet 21, after dehydration, by weight percentage, water content is 18～20%, and the mine tailing after dehydration is input in dryer 3 and is dried through material outlet 22 and material inlet 31, after oven dry, by weight percentage, water content is below 2%; Material after oven dry is delivered to roasting magnetization in rotary kiln 4 through material outlet 32 and material inlet 41, and sintering temperature is 700～950 ℃, time 30～50min, and the waste gas producing in roasting is discharged by Waste gas outlet 43 after tail ash is reclaimed in dedusting; Material after roasting magnetization is delivered to and in ore mill 5, carried out grinding through material outlet 42 and material inlet 51, and the order number of grinding accounts for 85% for good for-325 orders; Material after grinding is delivered to grader 6 through material outlet 52 and material inlet 61 and carry out classification processing, together with the material that meets magnetic separation standard is delivered to material inlet 71 through material outlet 62 in magnetic separator 7; Material after classification is roughly selected in one magnetic separator 7, material after roughly selecting is delivered to two road magnetic separators 8 through material outlet 72 and material inlet 81 and is carried out selected, after selected, obtain iron ore concentrate and sent, dewatered by iron ore concentrate outlet 82, the magnetic field intensity of magnetic separation is 1200～1600 oersteds; The mine tailing of one magnetic separator 7 is discharged through mine tailing outlet 73, and the mine tailing of two road magnetic separators 8 is discharged through mine tailing outlet 83, and the mine tailing of twice discharge pools together, after dewatering and filtering, and can be as building materials raw material.
With produced on-site bloodstone and Limonite processing mine tailing, through test, after rotary kiln magnetizing roast, levigate-325 orders account for 90%, and through the thick smart magnetic separation of 1200 oersteds one, the iron ore concentrate result of the test of acquisition is in table 1.
Table 1 magnetizing roast-low intensity magnetic separation result of the test/%
| Roasting time min | Numbering | Productive rate | Grade | The rate of recovery |
| ? | Concentrate | 36.26 | 58.45 | 65.73 |
| 30 | Mine tailing | 63.74 | 11.04 | 34.27 |
| ? | Raw ore | 100.00 | 32.24 | 100.00 |
| ? | Concentrate | 43.44 | 58.59 | 78.95 |
| 40 | Mine tailing | 56.55 | 6.78 | 21.05 |
| ? | Raw ore | 100.00 | 32.24 | 100.00 |
| ? | Concentrate | 53.07 | 57.39 | 94.47 |
| 50 | Mine tailing | 46.93 | 9.79 | 5.53 |
| ? | Raw ore | 100.00 | 1.78 | 100.00 |
| ? | Concentrate | 52.78 | 57.58 | 94.27 |
| 60 | Mine tailing | 47.22 | 1.8 | 5.73 |
| ? | Raw ore | 100.00 | 32.24 | 100.00 |
From table 1 result of the test, along with the increase of roasting time, the low intensity magnetic separation concentrate rate of recovery rises gradually, in the time that roasting time exceedes 50min, the rate of recovery starts to decline to some extent, suitable roasting time is 50min, and now the concentrate rate of recovery is 94.47%, and roasting effect is good, account under 85% condition at mog-325 order, the concentrate grade obtaining can bring up to 57.39%, illustrates that in mine tailing sample, iron mineral can be recycled completely, and can obtain the high-quality iron essence of 58 left and right grades.
Above said content is the basic imagination under the present invention conceives, and any equivalence change of making according to the present invention program all belongs to protection scope of the present invention.
Claims (10)
1. an ore-sorting system for iron-containing tailing regeneration, is characterized in that: comprise concentration tank, dewaterer, dryer, rotary kiln, ore mill, grader, one magnetic separator He Er road magnetic separator; Concentration tank has iron-containing tailing material input port and concentrated delivery outlet; Dewaterer has material inlet and material outlet; Dryer has material inlet and material outlet; Rotary kiln has material inlet and material outlet, Waste gas outlet; Ore mill has material inlet and material outlet; Grader has material inlet and material outlet; One magnetic separator has material inlet, material outlet and mine tailing outlet; Two road magnetic separators have material inlet, iron ore concentrate outlet and mine tailing outlet; The concentrated delivery outlet of concentration tank is connected to the material inlet of dewaterer, the material outlet of dewaterer is connected to the material inlet of dryer, the material outlet of dryer is connected to the material inlet of rotary kiln, the material outlet of rotary kiln is connected to the material inlet of ore mill, the material outlet of ore mill is connected to the material inlet of grader, the material outlet of grader is connected to the material inlet of one magnetic separator, and the material outlet of one magnetic separator is connected to the material inlet of two road magnetic separators.
2. a kind of ore-sorting system of iron-containing tailing regeneration as claimed in claim 1, is characterized in that the material outlet of described rotary kiln is connected to ore storage bin, regulates through ore storage bin outlet multigraph press the material inlet that enters ore mill.
3. a beneficiation method for iron-containing tailing regeneration, is characterized in that step is as follows:
The first step concentrates iron-containing tailing material in thickener;
Second step, sends the material after concentrated into dewaterer and dewaters;
The 3rd step, sends the material after dehydration into dryer and dries;
The 4th step, by the material after drying, in the magnetization of revolution roasting in kilns, waste gas reclaims through dedusting;
The 5th step is carried out grinding by the material after roasting magnetization in ore mill;
The 6th step, carries out classification processing by the material after grinding at grader, meets in mass transport to one magnetic separator of magnetic separation standard;
The 7th step, roughly selects the material after classification at one magnetic separator, mine tailing is discharged;
The 8th step, then the ore dressing Jing Er road magnetic separator after one magnetic separation is scanned, obtaining iron ore concentrate, mine tailing is discharged.
4. a kind of beneficiation method of iron-containing tailing regeneration as claimed in claim 3, is characterized in that in the described first step, concentrated after, by weight percentage, water content is 40%～60%.
5. a kind of beneficiation method of iron-containing tailing regeneration as claimed in claim 3, is characterized in that in described second step, after dehydration, by weight percentage, water content is 18～20%.
6. a kind of beneficiation method of iron-containing tailing regeneration as claimed in claim 3, is characterized in that in described the 3rd step, after oven dry, by weight percentage, water content is below 2%.
7. a kind of beneficiation method of iron-containing tailing regeneration as claimed in claim 3, is characterized in that in described the 4th step, rotary kiln baking temperature is 700～950 ℃, time 30～50min.
8. a kind of beneficiation method of iron-containing tailing regeneration as claimed in claim 3, is characterized in that in described the 5th step, the order number of ore mill grinding accounts for 85% for-325 orders.
9. a kind of beneficiation method of iron-containing tailing regeneration as claimed in claim 3, is characterized in that in described the 7th step and the 8th step, the magnetic field intensity of magnetic separation is 1200～1600 oersteds.
10. a kind of beneficiation method of iron-containing tailing regeneration as claimed in claim 3, is characterized in that in described the 7th step and the 8th step, the mine tailing of magnetic separation is after dewatering and filtering, as building materials raw material.
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| CN106345606B (en) * | 2016-08-26 | 2018-10-23 | 中冶北方（大连）工程技术有限公司 | A method of improving magnetite separation factory's ore dressing quality and production capacity |
| CN106362858A (en) * | 2016-10-14 | 2017-02-01 | 鞍钢集团矿业有限公司 | Process for extracting cement-replacing superfine iron tailing powder from iron tailings |
| CN107824318A (en) * | 2017-11-15 | 2018-03-23 | 中冶北方（大连）工程技术有限公司 | A kind of suspending magnetization roasting furnace feed preparation process |
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| CN101318159B (en) * | 2007-06-08 | 2013-04-10 | 鞍钢集团矿业公司 | Process for recycling Anshan type lean octahedral iron ore mine tailing |
| CN201105239Y (en) * | 2007-10-18 | 2008-08-27 | 马鞍山市天工科技有限公司 | High concentration concentrating cobber |
| CN101538645A (en) * | 2008-03-20 | 2009-09-23 | 张建宏 | Technique for roasting and dressing laterite nickel ore |
| CN101708494B (en) * | 2008-10-31 | 2013-05-01 | 鞍钢集团矿业公司 | Method for recycling iron minerals in magnetic separated gangues |
| CN102085526B (en) * | 2010-11-16 | 2012-10-03 | 山东乾舜矿冶科技股份有限公司 | Recycling method of blast furnace dust generated in steel making industry |
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