CN108672071A - A kind of artificial magnet plants processing and speculum iron is mixed into artificial magnet and plants magnetization sorting process - Google Patents
A kind of artificial magnet plants processing and speculum iron is mixed into artificial magnet and plants magnetization sorting process Download PDFInfo
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- CN108672071A CN108672071A CN201810427001.2A CN201810427001A CN108672071A CN 108672071 A CN108672071 A CN 108672071A CN 201810427001 A CN201810427001 A CN 201810427001A CN 108672071 A CN108672071 A CN 108672071A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
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Abstract
Processing is planted the invention discloses a kind of artificial magnet and speculum iron is mixed into artificial magnet and plants magnetization sorting process：A, the magnetic bead of 56% or more grade is selected from flyash by dry-dressing machine, then magnetic bead is classified by wind-force grading, gained 0.038mm magnetic beads are flyash magnetic kind；B, dry grinding dry separation, 60% or more gained concentrate grade are carried out to speculum iron roasted ore, then concentrate is classified by wind-force grading, gained 0.038mm iron ore concentrates are roasted ore magnetic kind；C, it dry grinds to speculum iron, is milled to 0.074mm accountings 80 85%, be incorporated 10 20% flyash magnetic kinds or roasted ore magnetic kind, be heated up to 70 DEG C of strength mixing magnetization；D, the speculum iron miberal powder after being magnetized is inhaled selected using magnetic, wind, wind, you can obtains the qualified iron ore concentrate of 55% or more grade, metal recovery rate reaches 85% or more.Present invention improves Iron Concentrate Qualities, improve resource utilization.
Description
Technical field
The invention belongs to technical field of mineral processing, and in particular to a kind of artificial magnet plants processing and spiegel magnetic mine sorting process.
Background technology
Iron ore resource lean ore more, magnetic mine in China's is few, and weak-magnetic iron ore accounts for about 70% of gross reserves or more, weak magnetic
For iron ore after high intensity magnetic separation is handled, iron concentrate grade is only 55%, and metal recovery rate is only 67% or so, and tailings grade is up to 22-
24%, it results in waste of resources.It is domestic in recent years that magnetizing roast low intensity magnetic separation processing is carried out using rotary kiln, shaft furnace, shower furnace, but with
It is higher and higher national environmental protection policy requirements, if magnetizing roast discharge flue gas requires purified treatment, it will cause roasting cost
It is higher, it is badly in need of exploitation one kind and environmental protection, and the technology of Iron Concentrate Quality and utilization rate can be improved.
Currently, domestic wine steel has successfully developed coal ash lifting iron process technology, ten thousand tons of Fly ash bead 3-5 is produced per year, together
When, wine steel mirror iron ore lump ore produces 2500000 tons of roasted ore iron ore concentrate or more per year, can be to prepare fine coal by shaft furnace magnetizing roast
Grey magnetic kind and roasted ore magnetic kind create conditions.
Invention content
That the purpose of the present invention is to solve speculum iron high intensity magnetic separation grades is low, metal recovery rate is low and magnetizing roast is of high cost
The problem of, the magnetization of weak magnetic speculum iron magnetic kind, magnetic, wind, wind that a kind of resource utilization is high, recycling is at low cost are provided
Inhale dry separation craft.
In order to achieve the above object, the present invention uses following technical scheme：A kind of artificial magnet plants processing and speculum iron is mixed into
Artificial magnet plants magnetization sorting process, and artificial magnet's kind is that flyash magnetic kind or roasted ore magnetic kind, the technique include the following steps：
A, the magnetic bead that dry-dressing machine selects 56% or more grade from flyash is combined by screw dry magnetic separator, tablet wind magnetic, then
Magnetic bead is classified by wind-force grading device, gained -0.038mm（Indicate that granularity is less than 0.038mm, below it is same
The expression way meaning of sample is also such）Magnetic bead is flyash magnetic kind, in the magnetic kind quality accounting 90% of magnetic mineral with
On, specific susceptibility is 92800 × 10-9m3/kg；Since Fly ash bead has the characteristics that natural porous, porosity 60-85%,
Surface modification treatment is no longer done, after classification, -0.038mm magnetic beads can become flyash magnetic kind.
B, high-pressure roller mill dry grinding is carried out to speculum iron roasted ore, screw dry magnetic separator, tablet wind magnetic combine dry-dressing machine
Dry separation, 60% or more gained concentrate grade, then concentrate is classified by wind-force grading device, gained -0.038mm iron
Concentrate is roasted ore magnetic kind, 90% or more the quality accounting of magnetic mineral in the magnetic kind；Since speculum iron is by shaft furnace, revolution
After kiln, shower furnace magnetizing roast, because of reducing gas CO, H2It penetrates into, CO2Gas overflowing causes roasted ore iron ore concentrate to have many
Micropore, porosity reaches 75-85%, no longer does surface modification treatment, and after classification, -0.038mm iron ore concentrates can become roasting
Burn mine magnetic kind.
C, it is dry grinded to speculum iron using high-pressure roller mill, is milled to -0.074mm quality accounting 80-85%, obtained mirror
Iron ore miberal powder is sent into powder mixer, is incorporated flyash magnetic kind or roasted ore magnetic kind, the flyash magnetic kind or roasted ore magnetic of addition
Kind accounts for the 10-20% of material gross mass in powder mixer, and the material in powder mixer is heated up to 70 DEG C, carries out strength mixing
Magnetization so that dissociated iron ion and assembled at magnetic using magnetic kind as karyomorphism, is i.e. speculum iron miberal powder is magnetized；Due to speculum iron category weak magnetic
Property mineral, to solve the problems, such as that magnetic separation is ineffective, the present invention is special to magnetize speculum iron magnetic kind supplying after dry type fine grinding,
Remanent magnetism due to magnetic kind itself and ground magnetic action, magnetic kind can occur magnetic with the lower weak magnetic mineral of specific susceptibility and mutually inhale
Induced labor magnetisation kind is reunited, and low intensity magnetic separation is recycled to carry out sorting processing.
D, the speculum iron miberal powder after being magnetized is preselected using screw dry magnetic separator dry type, and pre- concentrate selection uses tablet wind magnetic
Joint dry-dressing machine magnetic, wind, wind suction are selected, you can obtain the qualified iron ore concentrate of 55% or more grade, metal recovery rate reaches
85% or more.
Speculum iron iron ion after being magnetized is adsorbed in surrounding by magnetic kind, passes through 3000 Oe screw dry magnetic separators of field strength
Dry type preselects, and pre- concentrate selection is inhaled selected using 2000 Oe tablet wind magnetic of field strength joint dry-dressing machine magnetic, wind, wind, you can obtains
The qualified iron ore concentrate of 55% or more grade, metal recovery rate reach 85% or more.Former speculum iron fine ore is carried out using high intensity magnetic separation process
Processing, iron concentrate grade is only 45-47%, and metal recovery rate is only 65-67%, there is a problem of that resource utilization is low, passes through magnetic
After kind sorting process processing, the index of 55% or more iron concentrate grade, metal recovery rate 85% can be obtained, iron ore concentrate matter is improved
Amount and resource utilization.
The present invention has the advantages that compared with the prior art：The invention firstly uses Fly ash bead, roasted ore iron
The characteristic that concentrate has natural porous, porosity high, no longer does surface modification treatment, flyash is prepared by wind-force grading
Magnetic kind and roasted ore magnetic kind are incorporated 10-20% flyash magnetic kinds or roasted ore magnetic kind, are heated up to 70 DEG C to the weak magnetic after fine grinding
Speculum iron is magnetized, and the speculum iron miberal powder after magnetization is preselected by screw dry magnetic separator dry type, preselects wonderful tablet wind
Magnetic joint dry-dressing machine magnetic, wind, wind suction are selected, you can obtain the qualified iron ore concentrate of 55% or more grade, metal recovery rate reaches
85% or more.To solve, speculum iron high intensity magnetic separation metal recovery rate is low, iron concentrate grade is low and magnetizing roast low intensity magnetic separation is of high cost
Problem.
Description of the drawings
Fig. 1 is the flow diagram of the present invention.
Specific implementation mode
The invention will be further described in the following with reference to the drawings and specific embodiments.
Speculum iron belongs to weak-magnetic iron ore, and 70 DEG C of strength mixing magnetization need to be heated up to addition of magnetic kind, could pass through magnetic separation
Processing improves iron concentrate grade and metal recovery rate index.Speculum iron derives from wine steel mirror iron mahogany birch tree ditch mine, grade 32%；Powder
Coal ash is from two subsidiary factories of wine steel power generation；Roasted ore derives from wine steel ore dressing plant shaft furnace.
Prepare magnetic kind, the processing of speculum iron magnetization technology includes the following steps：
Embodiment 1
It is A, selected by the pre-selection of field strength 3000Oe screw dry magnetic separators, 2000 Oe tablet wind magnetic of field strength joint dry-dressing machine dry type,
The magnetic bead of grade 56% is selected from flyash, then magnetic bead is classified by wind-force grading device, prepare-
0.038mm magnetic beads are flyash magnetic kind, and magnetic mineral accounts for 90%；
B, it dry grinds to speculum iron roasted ore progress high-pressure roller mill and accounts for 85% to -0.074mm, 3000 Oe screw dry magnetic separation of field strength
Machine pre-selection, 2000 Oe tablet wind magnetic of field strength joint dry-dressing machine dry type are selected, gained concentrate grade 60%, then pass through wind-force granularity point
Stage arrangement is classified concentrate, and it is roasted ore magnetic kind to prepare -0.038mm iron ore concentrates, and magnetic mineral accounts for 90%；
C, it is dry grinded to speculum iron using high-pressure roller mill, is milled to -0.074mm accountings 80%, be sent into powder mixer, supplying
10% flyash magnetic kind is heated up to 70 DEG C of strength mixing magnetization, has dissociated iron ion and assembled at magnetic using magnetic kind as karyomorphism；
D, the speculum iron miberal powder after being magnetized is preselected using 3000 Oe screw dry magnetic separator dry types of field strength, preselects wonderful use
Strong 2000 Oe tablets wind magnetic joint dry-dressing machine magnetic, wind, wind inhale selected, you can obtains grade 55%, metal recovery rate 85%
Qualified iron ore concentrate.It is calculated by supplying 10% flyash magnetic kind 100% recycling, speculum iron metal recovery rate 74.14%, iron concentrate grade
54.7%, compared with high intensity magnetic separation, metal recovery rate improves 7.14 percentage points, and iron concentrate grade improves 7.7 percentage points, improves
Iron Concentrate Quality, improves resource utilization.
Embodiment 2
A, dry-dressing machine dry type essence is combined by the pre-selection of 3000 Oe screw dry magnetic separators of field strength, 2000 Oe tablet wind magnetic of field strength
Choosing, selects the magnetic bead of grade 56%, then be classified to magnetic bead by wind-force grading device from flyash, prepare-
0.038mm magnetic beads are flyash magnetic kind, and magnetic mineral accounts for 90%；
B, it dry grinds to speculum iron roasted ore progress high-pressure roller mill and accounts for 80% to -0.074mm, 3000 Oe screw dry magnetic separation of field strength
Machine pre-selection, 2000 Oe tablet wind magnetic of field strength joint dry-dressing machine dry type are selected, gained concentrate grade 60%, then pass through wind-force granularity point
Stage arrangement is classified concentrate, and it is roasted ore magnetic kind to prepare -0.038mm iron ore concentrates, and magnetic mineral accounts for 90%；
C, it is dry grinded to speculum iron using high-pressure roller mill, is milled to -0.074mm accountings 80%, be sent into powder mixer, supplying
20% roasted ore magnetic kind is heated up to 70 DEG C of strength mixing magnetization, has dissociated iron ion and assembled at magnetic using magnetic kind as karyomorphism；
D, the speculum iron miberal powder after being magnetized is preselected using 3000 Oe screw dry magnetic separator dry types of field strength, preselects wonderful use
Strong 2000 Oe tablets wind magnetic joint dry-dressing machine magnetic, wind, wind suction are selected, you can obtain grade 55.5%, metal recovery rate 86%
Qualified iron ore concentrate.It is calculated by supplying 20% roasted ore magnetic kind 100% recycling, speculum iron metal recovery rate 69.8%, iron concentrate grade
58.3%, compared with high intensity magnetic separation, metal recovery rate improves 2.8 percentage points, and iron concentrate grade improves 11.3 percentage points, improves
Iron Concentrate Quality, improves resource utilization.
Claims (4)
1. a kind of artificial magnet plants processing and speculum iron is mixed into artificial magnet and plants magnetization sorting process, artificial magnet's kind be flyash magnetic kind or
Roasted ore magnetic kind, it is characterised in that the technique includes the following steps：
A, the magnetic bead that dry-dressing machine selects 56% or more grade from flyash is combined by screw dry magnetic separator, tablet wind magnetic, then
Magnetic bead is classified by wind-force grading device, gained -0.038mm magnetic beads are flyash magnetic kind, magnetic in the magnetic kind
90% or more the quality accounting of property mineral；
B, high-pressure roller mill dry grinding being carried out to speculum iron roasted ore, screw dry magnetic separator, tablet wind magnetic combine dry-dressing machine dry separation,
60% or more gained concentrate grade, then concentrate is classified by wind-force grading device, gained -0.038mm iron ore concentrates are
For roasted ore magnetic kind, 90% or more the quality accounting of magnetic mineral in the magnetic kind；
C, it is dry grinded to speculum iron using high-pressure roller mill, is milled to -0.074mm quality accounting 80-85%, obtained speculum iron
Miberal powder is sent into powder mixer, is incorporated flyash magnetic kind or roasted ore magnetic kind, the flyash magnetic kind or roasted ore magnetic kind of addition account for
The 10-20% of material gross mass in powder mixer, the material in powder mixer are heated up to 70 DEG C, carry out strength mixing magnetization,
Assemble at magnetic using magnetic kind as karyomorphism so that having dissociated iron ion, i.e. speculum iron miberal powder is magnetized；
D, the speculum iron miberal powder after being magnetized is preselected using screw dry magnetic separator dry type, and pre- concentrate selection is combined using tablet wind magnetic
Dry-dressing machine magnetic, wind, wind suction are selected, you can obtain the qualified iron ore concentrate of 55% or more grade.
2. a kind of artificial magnet as described in claim 1 plants processing and speculum iron is mixed into artificial magnet and plants magnetization sorting process, special
Sign is：The field strength of the step A screw dries magnetic separator dry type pre-selection is 3000 Oe, and tablet wind magnetic combines what dry-dressing machine used
Field strength is 2000 Oe.
3. a kind of artificial magnet as described in claim 1 plants processing and speculum iron is mixed into artificial magnet and plants magnetization sorting process, special
Sign is：The field strength of the step B screw dries magnetic separator dry type pre-selection is 3000 Oe, and tablet wind magnetic combines what dry-dressing machine used
Field strength is 2000 Oe.
4. a kind of artificial magnet as described in claim 1 plants processing and speculum iron is mixed into artificial magnet and plants magnetization sorting process, special
Sign is：The field strength of the step D screw dries magnetic separator dry type pre-selection is 3000 Oe, and tablet wind magnetic combines what dry-dressing machine used
Field strength is 2000 Oe.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110787906A (en) * | 2019-10-18 | 2020-02-14 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Strong magnetic-magnetic seed magnetization combined separation process for refractory mineral powder ore |
| CN110860370A (en) * | 2019-10-18 | 2020-03-06 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Magnetizing roasting-magnetic seed magnetizing combined sorting process for refractory ore blocks |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110787906A (en) * | 2019-10-18 | 2020-02-14 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Strong magnetic-magnetic seed magnetization combined separation process for refractory mineral powder ore |
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