CN104888939B - Magnetic is preselected again, coarse concentrate regrinding selects bloodstone tailings recovery process again - Google Patents
Magnetic is preselected again, coarse concentrate regrinding selects bloodstone tailings recovery process again Download PDFInfo
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- CN104888939B CN104888939B CN201510320724.9A CN201510320724A CN104888939B CN 104888939 B CN104888939 B CN 104888939B CN 201510320724 A CN201510320724 A CN 201510320724A CN 104888939 B CN104888939 B CN 104888939B
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Abstract
Preselected again the present invention relates to a kind of magnetic, coarse concentrate regrinding selects bloodstone tailings recovery process again, sorted using " one thick one smart spiral chute, the strong magnetic of permanent magnetism grind grading, centrifuge flow ", the sorting index obtained when grinding particle size is 325 mesh 92.5% is：To ore deposit grade 12.63%, concentrate grade 67.95%, concentrate yield 4.00%, the rate of recovery 21.52%, tailings grade 10.33%.Mine tailing gravity flow at initial stage is discharged into Tailings Dam, and the later stage is pumped to Tailings Dam.Each section of thickener overflow water returns to mining tailing factory and recycled.
Description
Technical field
The invention belongs to iron ore beneficiation technical field, particularly a kind of magnetic is preselected again, coarse concentrate regrinding selects bloodstone tail again
Ore deposit recovery process.
Background technology
While metallurgical mine enterprises are extracted valuable mineral product in process of production, also generate substantial amounts of mine tailing and give up
Gurry.With the increase of iron and steel output, tailing waste thing will be more and more.Current iron tailings discarded object uses Tailings Dam collection
Middle stacking mode is deposited, and not only takes a large amount of soils, and certain influence is also generated to surrounding environment.
Due to technical reason, the outer last person for the mine tailing such as hematite separation factory that ore dressing plant is produced while iron ore concentrate is produced
Ore deposit is not recycled utilization always, the iron mineral being lost in its mine tailing predominantly bloodstone（Account for the 70% of mine tailing）, next to that magnetic
Iron（Account for the 30% of mine tailing）.Vignite thing is main to be existed in intergrowth form, it is necessary to it is carried out could effectively to return after fine grinding
Receive, traditional handicraft carries out simply classification, magnetic separation just for the mine tailing of bloodstone, be usually by grade 8-15%, weight hundred
Divide and feed drum sieve than being less than 0.1mm particulate iron tailings for 40-45%, -200 mesh, its undersize feeds one section strong
Magnetomechanical carries out roughing, and oversize is abandoned, and the concentrate of one section strong magnetomechanical is fed into two sections strong magnetomechanical carries out selected, one section strong magnetomechanical
Throwing tail, the concentrate of two sections strong magnetomechanical is fed into one section of centrifuge roughing, the mine tailing of two sections strong magnetomechanical is abandoned, then by one section centrifugation
The concentrate of machine feeds that two sections of centrifuges are selected, and the mine tailing of one section of centrifuge is abandoned, and the concentrate of two sections of centrifuges is final concentrate, two
The mine tailing of section centrifuge is abandoned.
Because the comprehensive utilization of bloodstone mine tailing can not only eliminate harm of the mine tailing to environment, it can be returned again as resource
Receive and utilize, with preferable environmental effect and higher economic interests, therefore, traditional handicraft also has the recovery for flotation tailing
Method.Because the concentrate grade after flotation is not high, mine tailing yield is big, silicon of its Iron grade in 4 3% or so, separation ore
And iron, the purpose of enriched iron is reached, difficulty is very big, and cost is uneconomical.Acidleach is used to bloodstone mine tailing --- reducing process,
Realize solid wastes recycling, the purpose of minimizing.During acidleach, when the temperature of reaction is 100 DEG C, asked during leaching as 2.5h
, speed of agitator is 400 r/m.Solution sulfuric acid concentration is 45%, can to iron recovery in iron ore when excess sulfuric acid coefficient is 1.5
Up to 82.3%.In reduction process, when reacted between be 2h, reaction temperature is 50 DEG C, can when the excess coefficients of iron filings is 1.4
So that excellent green vitriol product is made.P F S flocculants are made by oxidation polymerization.In Beneficiation Wastewater, as the p H of solution
Value is between 8~9, when dosage is 2~5m g/L (in terms of F e3+), when the degree of polymerization is between the % of 7 %~14, gathers
Closing ferric sulfate and turbidity of wastewater is removed has preferable effect.It is that 7.5%, p H values are 8.5 in the degree of polymerization, dosage is 3m g/L
When, minimum 5N T U of delivery turbidity or so.When handling percolate, when the p H of solution are between 8.5~9, throw
When dosage is 4 0~50 m g/L (in terms of F e "), the degree of polymerization is when between 11%~12. 5%, and bodied ferric sulfate is to this
Waste water C O D and turbidity removal have preferable treatment effect.When the degree of polymerization is that 8.5, p H values are 8.5, dosage is 4 0m
During g/L, delivery turbidity is 5.1, and two kinds of products of green vitriol and PFS are prepared using bloodstone mine tailing.
Traditional handicraft is difficult the effective monomer dissociation for realizing Armco magnetic iron mineral in mine tailing, while this part is with the adhesion bodily form
The Armco magnetic iron that formula is present also affects the sorting result to bloodstone.Therefore, outer last person's ore deposit of hematite separation factory is existing
It is more difficult in production procedure to reclaim.
The content of the invention
The purpose of the present invention is to reclaim iron ore concentrate for bloodstone spoil reclaming not increasing disappearing for iron ore deposit there is provided a kind of
Consumption, saves the process such as crushing and screening and primary grinding, the magnetic that iron ore concentrate production cost can be greatly lowered is preselected again, coarse-fine
Ore deposit regrinding and reconcentration bloodstone tailings recovery process.
The purpose of the present invention is realized by following technical proposals：
The magnetic of the present invention is preselected again, coarse concentrate regrinding selects bloodstone tailings recovery process again, it is characterised in that including following
Step：
1）Grade is fed into roughing spiral chute operation for 8% -15% bloodstone mine tailing ore pulp, roughing spiral chute is made
The concentrate of industry feeds selected spiral chute operation, the chats self-loopa of selected spiral chute operation, selected spiral chute operation
Mine tailing and the mine tailing of roughing spiral chute operation, which are combined into permanent magnetism, to be scanned operation and is scanned；The essence of selected spiral chute operation
It is the rough concentrate that 30.86%, yield is 13.23% that the concentrate that ore deposit scans operation with permanent magnetism, which merges into grade,；
2）Grade is that the rough concentrate that 30.86%, yield is 13.23% feeds cyclone and the grind grading of vertical mill composition is returned
Road carries out Regrinding, and cyclone overflow feeds low intensity magnetic separation operation；
3）The mine tailing of low intensity magnetic separation operation feeds one section of chats concentration operation concentration, underflow of one section of chats concentration operation and fed
Flat screen is sieved, and its granularity is that+1.5 mm oversizes throw tail, and granularity is that -1.5 mm undersizes feed high intensity magnetic separation work
Industry；
4）The concentrate of low intensity magnetic separation and high intensity magnetic separation operation, which merges, feeds two sections of chats concentration operations, and two sections of concentration underflows feed one
Section centrifugation machine operation, the overflow of overflow and two sections of chats concentration operations that one section of chats concentrates operation is used as recirculated water；
6）The concentrate of one section of centrifuge feeds two sections of centrifugation machine operations, and the concentrate of two sections of centrifuges is final concentrate, its
Concentrate grade 67.95%, concentrate yield 4.00%, the rate of recovery 21.52%；Two sections of centrifuge operation mine tailings return to two sections of chats concentrations
Operation；
Permanent magnetism scans operation mine tailing, high intensity magnetic separation operation mine tailing, one section of centrifuge operation mine tailing and merges into true tailings, its tail
Ore deposit grade is 10.33%.
It is an advantage of the invention that：
1）By selecting bloodstone the mine tailing of factory using two sections of spiral chutes, permanent magnetism scans pre-selection can obtain rough concentrate, greatly
The treating capacity of follow-up ore grinding, sorting operation is reduced greatly, improves the Beneficiation Feed Grade of follow-up sorting operation；
2）Weak magnetic-strong magnetic is preferable to the sorting result of rough concentrate, both improves concentrate grade, has abandoned a large amount of low-grade again
Sludge；Grade can be obtained for 67.95% by using two sections of centrifugations to sort mixed magnetic essence, and concentrate yield is 4.00%, and the rate of recovery reaches
21.52%, the preferable sorting index of tailings grade 10.33%.
The present invention is not increasing the consumption of iron ore deposit, saves the process such as crushing and screening and primary grinding, can be significantly
Degree reduction iron ore concentrate production cost, the outer last person's ore deposit for fundamentally solving hematite separation factory is not recycled utilizes this always
One technical barrier.Be conducive to reclaiming valuable ferrous components from mine tailing is dumped, further increase the utilization for having developed iron ore deposit
Rate, reduces tailings discharging amount, complies fully with industrial policy of the country about the utilization of resources and energy-saving and emission-reduction.
Brief description of the drawings
Fig. 1 is preselected again for the magnetic of the present invention, coarse concentrate regrinding selects the flow chart of bloodstone tailings recovery process again.
Embodiment
The embodiment of the present invention is further illustrated below in conjunction with the accompanying drawings.
As shown in figure 1, the magnetic of the present invention is preselected, coarse concentrate regrinding selects bloodstone tailings recovery process again again, its feature exists
In comprising the following steps：
1）Grade is fed into roughing spiral chute operation for 8% -15% bloodstone mine tailing ore pulp, roughing spiral chute is made
The concentrate of industry feeds selected spiral chute operation, the chats self-loopa of selected spiral chute operation, selected spiral chute operation
Mine tailing and the mine tailing of roughing spiral chute operation, which are combined into permanent magnetism, to be scanned operation and is scanned；The essence of selected spiral chute operation
It is the rough concentrate that 30.86%, yield is 13.23% that the concentrate that ore deposit scans operation with permanent magnetism, which merges into grade, has abandoned grade
9.85%th, the low-grade tailings of yield 86.77%, greatly reduce the treating capacity of ore grinding amount and follow-up sorting operation, improve simultaneously
The Beneficiation Feed Grade of follow-up sorting operation, the rough concentrate granularity for scanning acquisition through two sections of spiral chutes, permanent magnetism is -200 mesh
58.67%, iron mineral degree of dissociation 35.00%；
2）Grade is that the rough concentrate that 30.86%, yield is 13.23% feeds cyclone and the grind grading of vertical mill composition is returned
Road carries out Regrinding, and cyclone overflow feeds low intensity magnetic separation operation；
3）The mine tailing of low intensity magnetic separation operation feeds one section of chats concentration operation concentration, and the underflow of one section of chats concentration operation is fed
Flat screen is sieved, and its granularity is that+1.5 mm oversizes throw tail, and granularity is that -1.5 mm undersizes feed high intensity magnetic separation work
Industry；
Weak magnetic-strong magnetic is preferable to the sorting result of rough concentrate, and concentrate grade both was brought up into 50.33% by 30.86%, thrown again
A large amount of low-grade sludges have been abandoned, -10 μm of rank contents is reduced to 32.15% by 55.60%, is provided preferably for subsequent job
Selected condition；
4）The concentrate of low intensity magnetic separation and high intensity magnetic separation operation, which merges, feeds two sections of chats concentration operations, and two sections of concentration underflows feed one
Section centrifugation machine operation, the overflow of overflow and two sections of chats concentration operations that one section of chats concentrates operation is used as recirculated water；
5）The concentrate of one section of centrifuge feeds two sections of centrifugation machine operations, and the concentrate of two sections of centrifuges is final concentrate, its
Concentrate grade 67.95%, concentrate yield 4.00%, the rate of recovery 21.52%；Two sections of centrifuge operation mine tailings return to two sections of chats concentrations
Operation；
Permanent magnetism scans operation mine tailing, high intensity magnetic separation operation mine tailing, one section of centrifuge operation mine tailing and merges into true tailings, its tail
Ore deposit grade is 10.33%.
The present invention is sorted using " spiral chute, permanent magnetism-ore grinding-strong magnetic, centrifuge flow ", be in grinding particle size-
The sorting index obtained during 325 mesh 92.5% is：To ore deposit grade 12.63%, concentrate grade 67.95%, concentrate yield 4.00% is reclaimed
Rate 21.52%, tailings grade 10.33%.Mine tailing gravity flow at initial stage is discharged into Tailings Dam, and the later stage is pumped to Tailings Dam.Each section of thickener
Overflow water returns to mining tailing factory and recycled.
Claims (1)
1. a kind of magnetic is preselected again, coarse concentrate regrinding selects bloodstone tailings recovery process again, it is characterised in that comprised the following steps：
1）It is that 8% -15% bloodstone mine tailing ore pulp feeds roughing spiral chute operation, the essence of roughing spiral chute operation by grade
Ore deposit feeds selected spiral chute operation, the chats self-loopa of selected spiral chute operation, the mine tailing of selected spiral chute operation with
The mine tailing of roughing spiral chute operation, which is combined into permanent magnetism, to be scanned operation and is scanned；The concentrate of selected spiral chute operation with forever
Magnetic scans the concentrate of operation, and to merge into grade be the rough concentrate that 30.86%, yield is 13.23%；
2）Grade is that the rough concentrate that 30.86%, yield is 13.23% feeds cyclone and the grind grading loop of vertical mill composition is entered
Row Regrinding, cyclone overflow feeds low intensity magnetic separation operation；
3）The mine tailing of low intensity magnetic separation operation feeds one section of chats concentration operation concentration, and the underflow of one section of chats concentration operation feeds flat board
Sieved, its granularity is that+1.5 mm oversizes throw tail, and granularity is that -1.5 mm undersizes feed high intensity magnetic separation operation；
4）The concentrate of low intensity magnetic separation and high intensity magnetic separation operation, which merges, feeds two sections of chats concentration operations, two sections of concentration underflows feed one section from
Scheming operation, the overflow of overflow and two sections of chats concentration operations that one section of chats concentrates operation is used as recirculated water；
5）The concentrate of one section of centrifuge feeds two sections of centrifugation machine operations, and the concentrate of two sections of centrifuges is final concentrate, its concentrate
Grade 67.95%, concentrate yield 4.00%, the rate of recovery 21.52%；Two sections of centrifuge operation mine tailings return to two sections of chats concentration operations；
Permanent magnetism scans operation mine tailing, high intensity magnetic separation operation mine tailing, one section of centrifuge operation mine tailing and merges into true tailings, its mine tailing product
Position is 10.33%.
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| CN201510320724.9A CN104888939B (en) | 2015-06-12 | 2015-06-12 | Magnetic is preselected again, coarse concentrate regrinding selects bloodstone tailings recovery process again |
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| CN201510320724.9A CN104888939B (en) | 2015-06-12 | 2015-06-12 | Magnetic is preselected again, coarse concentrate regrinding selects bloodstone tailings recovery process again |
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| CN104888939B true CN104888939B (en) | 2017-10-13 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106216082A (en) * | 2016-08-18 | 2016-12-14 | 鞍钢集团矿业有限公司 | Low-grade Anshan type iron mine composite ore ore-dressing technique |
| CN108580028A (en) * | 2018-08-01 | 2018-09-28 | 中冶北方（大连）工程技术有限公司 | A kind of red magnetic mixing iron ore chats ore-dressing technique |
| CN109759248B (en) * | 2019-02-28 | 2021-06-01 | 玉溪大红山矿业有限公司 | Magnetic-gravity combined upgrading and tailing-reducing mineral separation process for underground low-grade iron ore |
| CN112791850A (en) * | 2020-11-30 | 2021-05-14 | 河北钢铁集团矿业有限公司 | Grading and pre-selecting method for hematite |
| CN113042200A (en) * | 2021-03-30 | 2021-06-29 | 酒泉钢铁(集团)有限责任公司 | Grading and pre-selecting process for low-grade refractory iron oxide ore |
| CN113385299B (en) * | 2021-05-28 | 2022-06-14 | 鞍钢集团矿业有限公司 | Magnetic-gravity-magnetic combined ore dressing process for treating lean magnetite ore |
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| RU2099145C1 (en) * | 1993-09-03 | 1997-12-20 | Трофимов Николай Николаевич | Method of processing wastes of concentrated mills |
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Address after: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Applicant after: Anshan Iron and Steel Group Mining Co., Ltd. Address before: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Applicant before: Angang Group Mine Company |
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