CN117399172A - Preparation method and equipment of ultrapure iron concentrate - Google Patents
Preparation method and equipment of ultrapure iron concentrate Download PDFInfo
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- CN117399172A CN117399172A CN202311550422.1A CN202311550422A CN117399172A CN 117399172 A CN117399172 A CN 117399172A CN 202311550422 A CN202311550422 A CN 202311550422A CN 117399172 A CN117399172 A CN 117399172A
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- concentrate
- concentration
- elutriator
- magnetic separation
- electromagnetic
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 118
- 239000012141 concentrate Substances 0.000 title claims abstract description 100
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 59
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 238000005188 flotation Methods 0.000 claims abstract description 42
- 238000000227 grinding Methods 0.000 claims abstract description 31
- 238000007885 magnetic separation Methods 0.000 claims abstract description 30
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 24
- 239000004576 sand Substances 0.000 claims abstract description 16
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 12
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000007599 discharging Methods 0.000 claims abstract description 9
- JRBPAEWTRLWTQC-UHFFFAOYSA-N dodecylamine Chemical compound CCCCCCCCCCCCN JRBPAEWTRLWTQC-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000006148 magnetic separator Substances 0.000 claims abstract description 9
- 240000006891 Artemisia vulgaris Species 0.000 claims abstract description 6
- 235000003261 Artemisia vulgaris Nutrition 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 230000005347 demagnetization Effects 0.000 claims abstract description 4
- 230000002093 peripheral effect Effects 0.000 claims description 16
- 230000007246 mechanism Effects 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 9
- 230000008261 resistance mechanism Effects 0.000 claims description 9
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 6
- 239000003814 drug Substances 0.000 claims description 5
- 239000006260 foam Substances 0.000 claims description 5
- 238000004537 pulping Methods 0.000 claims description 5
- 229960000583 acetic acid Drugs 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000007865 diluting Methods 0.000 claims description 3
- 239000012362 glacial acetic acid Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000002156 mixing Methods 0.000 abstract description 2
- 235000009051 Ambrosia paniculata var. peruviana Nutrition 0.000 abstract 1
- 235000003097 Artemisia absinthium Nutrition 0.000 abstract 1
- 235000017731 Artemisia dracunculus ssp. dracunculus Nutrition 0.000 abstract 1
- 239000001138 artemisia absinthium Substances 0.000 abstract 1
- KDYFGRWQOYBRFD-UHFFFAOYSA-N succinic acid Chemical compound OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 19
- 239000011362 coarse particle Substances 0.000 description 9
- 239000000047 product Substances 0.000 description 9
- 239000010419 fine particle Substances 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 description 5
- 238000003780 insertion Methods 0.000 description 5
- 230000037431 insertion Effects 0.000 description 5
- 239000011707 mineral Substances 0.000 description 5
- 229910052681 coesite Inorganic materials 0.000 description 4
- 229910052906 cristobalite Inorganic materials 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 235000012239 silicon dioxide Nutrition 0.000 description 4
- 229910052682 stishovite Inorganic materials 0.000 description 4
- 229910052905 tridymite Inorganic materials 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000004088 foaming agent Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- -1 electronics Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- 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
- B03C1/30—Combinations with other devices, not otherwise provided for
-
- 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
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
- B02C23/24—Passing gas through crushing or disintegrating zone
- B02C23/28—Passing gas through crushing or disintegrating zone gas moving means being integral with, or attached to, crushing or disintegrating element
-
- 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
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
- B02C23/24—Passing gas through crushing or disintegrating zone
- B02C23/30—Passing gas through crushing or disintegrating zone the applied gas acting to effect material separation
-
- 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
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
- B02C23/24—Passing gas through crushing or disintegrating zone
- B02C23/32—Passing gas through crushing or disintegrating zone with return of oversize material to crushing or disintegrating zone
-
- 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
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
-
- 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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/02—Froth-flotation processes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a preparation method and equipment of ultra-pure iron concentrate, S1: fine grinding operation: magnetite concentrate with TFe grade of 68.0+/-0.5% and water content of less than or equal to 8% is slurried in advance to form ore pulp with mass concentration of 45%, and then the ore pulp is fed into an wormwood sand mill for fine grinding; s2: weak magnetic separation-elutriation selection operation: feeding the ground ore product of the mugwort sand mill into a weak magnetic separator for rough concentration to obtain weak magnetic separation rough concentration ore concentrate, and discharging weak magnetic separation rough concentration tailings; after demagnetizing the rough concentration ore concentrate with low-intensity magnetic separation, feeding the rough concentration ore concentrate into an electromagnetic elutriator for concentration, and discharging the tailings of the electromagnetic elutriator for concentration; s3: after demagnetizing the low-intensity magnetic concentrate, feeding the low-intensity magnetic concentrate into an electromagnetic elutriator for concentration, and carrying out tail discarding again for pre-demagnetization; s4: reverse flotation operation: the electromagnetic elutriation concentrate is demagnetized and fed into reverse flotation operation, sodium carbonate is adopted as a regulator in the reverse flotation operation to perform pre-pulp mixing, and then dodecylamine is adopted as a collector to perform reverse flotation. The iron ore grinding device has the effects of improving ore grinding efficiency and improving iron ore concentrate purity.
Description
Technical Field
The invention relates to the field of mineral processing, in particular to a method and equipment for preparing ultra-pure iron concentrate.
Background
The ultra-pure iron concentrate is an important raw material source of new iron-based mineral materials, generally requires TFe grade to be more than 72.0 percent and the content of impurities (acid insoluble matters) such as SiO2 to be less than 0.2 percent, can be widely used for producing powder metallurgy, magnetic materials, ultra-pure iron and clean steel base materials, electronics, chemical industry, environmental protection, fresh preservation, medical treatment and other industries, and the demand of the ultra-pure iron concentrate is increased along with the development of social and economic technologies. Compared with common iron ore concentrate, the super iron ore concentrate has higher technical content and additional value, the selling price of the super iron ore concentrate is 3-5 times of that of the common iron ore concentrate, and the processing production of the super iron ore concentrate has important significance for improving the economic benefit of enterprises, fully playing the value of limited high-quality mineral resources in China, promoting the technological progress of mineral processing and upgrading the products.
The Chinese patent publication No. CN1920066A discloses a production method of ultrapure iron concentrate powder, which comprises the step of improving low-grade iron concentrate containing 60-66% of iron to about 71%. Grinding low-grade 60-66% iron concentrate powder with granularity of 160-180 meshes, and separating out 260-mesh mineral powder by a separator; adding water mixed solution composed of strong alkaline medicament, wherein the concentration of the strong alkaline water mixed solution is 15-22%, placing into a reaction kettle, stirring, heating to 200 ℃, maintaining the pressure for 8 hours when the pressure reaches 0.6 MPa, and discharging; the discharged material is put into a precipitation tank for precipitation, the upper part of the precipitate is byproduct sodium silicate solution, and the lower part of the precipitate is ultrapure iron concentrate powder.
In the related art, chinese patent publication No. CN1920066a discloses a method for preparing super iron ore concentrate from low-grade magnetite ore, which comprises (1) a stage of grinding: grinding the crushed iron ore with the iron content lower than 30% in a grid type or overflow type ball mill; (2) first-step weak magnetic separation: feeding overflow of the classifier into a low intensity magnetic separator for separation; (3) two-stage grinding: feeding the rough magnetite concentrate obtained by the weak magnetic separation into a small mill for regrinding for further fine grinding, (4) performing the second-step weak magnetic separation: overflowing the re-ground classifier into a magnetic separator for second-step weak magnetic separation to perform second-step separation; (5) reverse flotation: adding chemicals, mixing pulp and stirring to the magnetite concentrate obtained by the second-step weak magnetic separation, and then feeding the magnetite concentrate into a flotation machine for reverse flotation; (6) product treatment: concentrating, filtering and drying the tank bottom of the reverse flotation to obtain super iron concentrate.
Aiming at the related technology, the existing super iron concentrate mainly adopts the production processes of fine grinding, magnetic separation, flotation or fine grinding, magnetic separation, flotation and chemical leaching, and has the following defects: the grinding mode is single, so that the grinding efficiency is low, the energy consumption is high, most of reverse flotation operations only add amine medicaments, and the pre-pulping is not performed, so that the flotation index is poor, and the content of SiO2 impurities in the concentrate is high.
Disclosure of Invention
In order to improve grinding efficiency and purity of iron ore concentrate, the application provides a preparation method and equipment of ultra-pure iron ore concentrate.
In a first aspect, the present application provides a method for preparing an ultrapure iron concentrate, which adopts the following technical scheme:
the preparation method of the ultra-pure iron concentrate comprises the following steps: s1: fine grinding operation: magnetite concentrate with TFe grade of 68.0+/-0.5% and water content of less than or equal to 8% is slurried in advance to form ore pulp with mass concentration of 45%, and then fed into an moxa sand mill (1) for fine grinding, the grinding concentration of the moxa sand mill (1) is controlled to be about 45%, and the granularity of the product is controlled to be more than 94% in-0.038 mm; s2: weak magnetic separation-elutriation selection operation: feeding the ground product of the mugwort sand mill (1) into a weak magnetic separator for roughing to obtain weak magnetic separation roughing concentrate, and discharging weak magnetic separation roughing tailings; after demagnetizing the rough concentration ore concentrate with low-intensity magnetic separation, feeding the rough concentration ore concentrate with low-intensity magnetic separation into an electromagnetic elutriator for concentration to obtain concentration ore concentrate with the electromagnetic elutriator, and discharging concentration tailings with the electromagnetic elutriator; the quality concentration of the ore pulp of the bottom flow concentrate selected by the electromagnetic elutriator is controlled to be 50-60%, the weak magnetic separation roughing adopts a permanent magnet cylinder type magnetic separator, the concentrate elutriator is adopted for the concentration, and the magnetic field intensity of the weak magnetic separation roughing is 80mT; s3: the low-intensity magnetic concentrate is demagnetized and then fed into an electromagnetic elutriator for concentration, the tailings are thrown again, and the concentration of the underflow concentrate of the elutriator is controlled to be 50-60%; diluting the underflow concentrate of the elutriator to 25-30% concentration, and carrying out pre-demagnetization; s4: reverse flotation operation: demagnetizing the electromagnetic elutriation concentrate, feeding the demagnetizing operation into reverse flotation, adding 1200g/t of regulator sodium carbonate into the reverse flotation rougher, and 130g/t of collector; the reverse flotation is carefully selected, 400g/t of regulator sodium carbonate and 32g/t of collector are added; the reverse flotation operation adopts a one-time roughing and one-time selecting open-circuit process to obtain ultra-pure iron concentrate with TFe grade of 72.2%, siO2 content of 0.13% and acid insoluble content of 0.16%, flotation foam is high-purity iron concentrate with TFe grade of 70.7%, the reverse flotation operation adopts sodium carbonate as a regulator to perform pre-pulping, and then adopts dodecylamine as a collector to perform reverse flotation; preparing a 10% solution by using the regulator, and preparing the collector according to the molar ratio of the dodecyl amine to the glacial acetic acid of 1:1; the medicament system is as follows: coarse dressing regulator amount 1200g/t, collector amount 130g/t, fine dressing regulator amount 400, collector amount 32g/t.
Through adopting the technical scheme, after the iron ore concentrate is pulped in advance, an moxa sand mill is adopted to carry out fine grinding, so that the ore grinding efficiency is improved, then through magnetic separation and reverse flotation, and sodium carbonate is used as a regulator, and dodecylamine is used as a collector, so that the magnetite and quartz (SiO 2) can be effectively separated under the condition that a foaming agent is not added, the quality of the ore concentrate is improved, the ultra-pure iron ore concentrate with the TFe grade of 72.2% at the bottom of a flotation tank, the SiO2 content of 0.13% and the acid insoluble content of 0.16% is obtained, and the flotation foam is the high-purity iron ore concentrate with the TFe grade of 70.7%. The comprehensive cost is low, the recovery rate is high, the quality of the produced super iron concentrate is high, and the large-scale industrial production is easy to realize.
In a second aspect, the present application provides an apparatus for preparing ultra-pure iron concentrate, which adopts the following technical scheme:
the utility model provides a preparation equipment of ultrapure iron ore concentrate, includes the frame, set up in barrel in the frame, rotate set up in pivot in the barrel and be used for the drive pivot pivoted power unit, power unit is fixed in the frame, be provided with a plurality of agitator disk in the pivot, hierarchical structure is installed to the tip of pivot.
Through adopting above-mentioned technical scheme, the axis of rotation drives hierarchical structure, rotates and produces centrifugal force, and centrifugal force is concentrated in the axle center region with the fine particle naturally, and coarse particle gets rid of towards the edge, because receive the extrusion of the thick fine particle thick liquid of upper reaches, and qualified product granularity goes out, and coarse particle is got back to the upper reaches along the section of thick bamboo wall and continues to grind until reaching qualified granularity.
Preferably, the hierarchical structure comprises a fixed flange plate fixedly connected to the rotating shaft, a plurality of impeller plates fixedly connected to the fixed flange plate, a hoop fixedly connected to the side surface of the impeller plates away from the fixed flange plate, and a detachable flange plate detachably connected with the hoop, wherein a flow hole is formed in the fixed flange plate, and a discharge hole is formed in the detachable flange plate.
Through adopting above-mentioned technical scheme, fill into the hierarchical structure with the iron ore concentrate in, the rotation of pivot can drive the hierarchical structure and rotate to make the ore pulp that grinds can flow, the ore that does not grind continues to grind, wherein can dismantle the ring flange and can dismantle with the hoop and be connected, thereby be convenient for clear up the inside grading plant after grinding work is accomplished.
Preferably, the detachable flange plate is close to the jack is formed in the side face of the hoop, the inserting rod capable of being inserted into the jack is fixedly connected to the hoop, the sliding hole is formed in the side face of the jack, the locking groove is formed in the inserting rod, one end of the locking rod capable of being inserted into the locking groove is slidably arranged in the sliding hole, and the detachable flange plate is further provided with a resistance mechanism for preventing the locking rod from sliding in the direction away from the inserting rod and a driving mechanism for driving the locking rod to slide in the direction away from the inserting rod.
Through adopting above-mentioned technical scheme, after the inserted bar is inserted in locating the jack, under the restriction of resistance mechanism, the locking lever can be stable insert locate the locking inslot to under actuating mechanism's driving action, can drive the locking lever to keeping away from the direction slip of inserted bar and break away from the locking inslot, thereby the dismouting of removable ring flange of being convenient for, and then be convenient for clear up the inside hierarchical structure.
Preferably, a limit groove is formed in the inner wall of the sliding hole, a limit block is fixedly connected to the locking rod, the resistance mechanism comprises a thrust spring arranged in the limit groove, one end of the thrust spring abuts against the limit block and is away from the side face of the inserting rod, and the other end of the thrust spring abuts against the limit groove and is away from the side wall of the inserting rod.
Through adopting above-mentioned technical scheme, thrust spring's one end is contradicted on the side that the inserted bar was kept away from to the stopper, thrust spring's the other end is contradicted on the lateral wall that the inserted bar was kept away from to the spacing groove to make the spacing inslot of inserting that the spacing bar can be stable, make removable ring flange can be stably fixed in on the hoop.
Preferably, the inserted link is located be fixed with a plurality ofly on the hoop, the jack is located removable ring flange goes upward and has seted up a plurality ofly, the inserted link with jack one-to-one, removable ring flange is kept away from set up circular recess on the side of fixed ring flange, the sliding hole communicate in circular recess, the locking lever keep away from the one end of inserted link extends to in the circular recess, actuating mechanism including rotate set up in unblock plectane in the circular recess, unblock plectane is close to set up circular groove of stepping down on the side of fixed ring flange, fixedly connected with ejector pad on the inner peripheral wall of circular groove of stepping down, the ejector pad is close to be provided with first inclined plane on the side of unblock plectane axial lead, the locking lever is located the one end of circular recess is provided with the unlocking piece, be provided with on the unlocking piece can with the second inclined plane that first inclined plane is inconsistent, the ejector pad with the unblock one-to-one correspondence.
Through adopting above-mentioned technical scheme, when rotating the unblock plectane, under the interference effect on first inclined plane and second inclined plane, the ejector pad can be through the direction slip of unblock piece drive locking lever to keeping away from the inserted bar to make many locking levers break away from simultaneously in the locking groove on the inserted bar, the dismantlement of removable ring flange of being convenient for.
Preferably, a first annular groove is formed in the inner peripheral wall of the circular groove, a baffle ring is fixedly connected to the outer peripheral surface of the unlocking circular plate, and the baffle ring is rotatably arranged in the first annular groove.
Through adopting above-mentioned technical scheme, the baffle rotates and sets up in first ring channel to the unblock plectane can more stable rotation set up in the circular recess.
Preferably, a second annular groove is formed in the inner peripheral wall of the circular groove, a coil spring is arranged in the second annular groove, one end of the coil spring is fixed on the inner peripheral wall of the second annular groove, and the other end of the coil spring is fixed on the outer peripheral surface of the unlocking circular plate.
By adopting the technical scheme, under the action of the elasticity of the coil spring, the first inclined surface on the push block can be kept in a state of being separated from the second inclined surface.
Preferably, a third inclined plane is formed at the end of the locking rod, which is close to the inserted link, and the third inclined plane faces to one side, which is close to the fixed flange.
Through adopting above-mentioned technical scheme, the third inclined plane is located the locking lever and is close to the tip of inserted bar, and the third inclined plane is towards the one side that is close to the fixed flange to in the inserted bar inserts and locates the jack of being convenient for.
In summary, the present application includes at least one of the following beneficial technical effects:
1. through pulping the iron ore concentrate in advance, adopting an moxa sand mill to carry out fine grinding, improving the ore grinding efficiency, then carrying out magnetic separation and reverse flotation, and using sodium carbonate as a regulator and dodecylamine as a collector, the method can realize the effective separation of magnetite and quartz (SiO 2) without adding a foaming agent, improve the concentrate quality, obtain ultra-pure iron ore concentrate with a flotation tank bottom TFe grade of 72.2%, a SiO2 content of 0.13% and an acid insoluble matter content of 0.16%, and obtain high-purity iron ore concentrate with a flotation foam TFe grade of 70.7%. The comprehensive cost is low, the recovery rate is high, the quality of the produced super iron concentrate is high, and the large-scale industrial production is easy to realize;
2. the rotating shaft drives the grading structure, centrifugal force is generated by rotation, fine particles are naturally concentrated towards the axis region, coarse particles are thrown towards the edge, qualified product granularity is discharged due to extrusion of upstream coarse and fine particle slurry, and coarse particles return to upstream along the cylinder wall to be continuously ground until the qualified granularity is reached;
3. after the inserted link is inserted in the jack, under the restriction of resistance mechanism, the locking lever can be stable insert locate the locking inslot to under actuating mechanism's driving action, can drive the locking lever to keeping away from the direction slip of inserted link and break away from the locking inslot, thereby the dismouting of removable ring flange of being convenient for, and then be convenient for clear up the inside hierarchical structure.
Drawings
Fig. 1 is a process flow diagram of a method for preparing ultra-pure iron concentrate in the examples of the present application.
Fig. 2 is a schematic diagram of the overall structure of the mugwort grinding machine in the embodiment of the application.
Fig. 3 is a cross-sectional view of a cartridge in an embodiment of the present application.
Fig. 4 is an exploded view of a hierarchical structure in an embodiment of the present application.
Fig. 5 is a cross-sectional view of a removable flange in an embodiment of the present application.
Fig. 6 is a schematic diagram of the overall structure of the unlocking circular plate in the embodiment of the application.
Reference numerals illustrate: 1. a frame; 2. a cylinder; 21. a support rod; 3. a rotating shaft; 4. a stirring plate; 5. a power mechanism; 51. a motor; 6. a hierarchical structure; 61. a fixed flange; 611. a flow hole; 62. an impeller plate; 63. a hoop; 64. a detachable flange; 641. a discharge hole; 642. a jack; 643. a sliding hole; 644. a limit groove; 645. a circular groove; 646. a first annular groove; 647. a second annular groove; 65. a rod; 651. a locking groove; 66. a locking lever; 661. a limiting block; 662. a third inclined surface; 663. unlocking the block; 6631. a second inclined surface; 67. a resistance mechanism; 671. a thrust spring; 68. a driving mechanism; 681. unlocking the circular plate; 6811. a circular relief groove; 682. a pushing block; 6821. a first inclined surface; 684. a baffle ring; 685. a coil spring; 100. and (5) grinding the moxa sand.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-6.
The embodiment of the application discloses a preparation method of ultra-pure iron concentrate, which is shown by referring to fig. 1 and comprises the following steps: s1: fine grinding operation: magnetite concentrate with TFe grade of 68.0+/-0.5% and water content of less than or equal to 8% is slurried in advance to form ore pulp with mass concentration of 45%, and then fed into an moxa sand mill 100 for fine grinding, the ore grinding concentration of the moxa sand mill 100 is controlled to be about 45%, and the granularity of the product is controlled to be more than 94% in-0.038 mm; s2: weak magnetic separation-elutriation selection operation: feeding the ground product of the mugwort sand mill 100 into a weak magnetic separator for roughing to obtain weak magnetic separation roughing concentrate, and discharging weak magnetic separation roughing tailings; after demagnetizing the rough concentration ore concentrate with low-intensity magnetic separation, feeding the rough concentration ore concentrate with low-intensity magnetic separation into an electromagnetic elutriator for concentration to obtain concentration ore concentrate with the electromagnetic elutriator, and discharging concentration tailings with the electromagnetic elutriator; the quality concentration of the ore pulp of the bottom flow concentrate selected by the electromagnetic elutriator is controlled to be 50-60%, the weak magnetic separation roughing adopts a permanent magnet cylinder type magnetic separator, the concentrate elutriator is adopted for the concentration, and the magnetic field intensity of the weak magnetic separation roughing is 80mT; s3: the low-intensity magnetic concentrate is demagnetized and then fed into an electromagnetic elutriator for concentration, the tailings are thrown again, and the concentration of the underflow concentrate of the elutriator is controlled to be 50-60%; diluting the underflow concentrate of the elutriator to 25-30% concentration, and carrying out pre-demagnetization; s4: reverse flotation operation: demagnetizing the electromagnetic elutriation concentrate, feeding the demagnetizing operation into reverse flotation, adding 1200g/t of regulator sodium carbonate into the reverse flotation rougher, and 130g/t of collector; the reverse flotation is carefully selected, 400g/t of regulator sodium carbonate and 32g/t of collector are added; the reverse flotation operation adopts a one-time roughing and one-time selecting open-circuit process to obtain ultra-pure iron concentrate with TFe grade of 72.2%, siO2 content of 0.13% and acid insoluble content of 0.16%, flotation foam is high-purity iron concentrate with TFe grade of 70.7%, the reverse flotation operation adopts sodium carbonate as a regulator to perform pre-pulping, and then adopts dodecylamine as a collector to perform reverse flotation; preparing a 10% solution by using the regulator, and preparing the collector according to the molar ratio of the dodecyl amine to the glacial acetic acid of 1:1; the medicament system is as follows: coarse dressing regulator amount 1200g/t, collector amount 130g/t, fine dressing regulator amount 400, collector amount 32g/t.
The embodiment of the application also discloses equipment for preparing the ultra-pure iron ore concentrate. Referring to fig. 2 and 3, the moxa grinding machine 100 includes a frame 1, a cylinder 2, a rotation shaft 3, a stirring disk 4, and a power mechanism 5. The frame 1 fixed mounting is subaerial, and barrel 2 transversely sets up in frame 1, and the vertical bracing piece 21 that is fixed with in bottom of barrel 2, bracing piece 21 pass through slide rail and slider horizontal slip setting in frame 1 for barrel 2 can the horizontal slip setting in frame 1.
Referring to fig. 2 and 3, the rotating shaft 3 is rotatably disposed on the frame 1, the rotating shaft 3 is horizontally inserted into the cylinder 2, the stirring discs 4 are fixedly connected to the rotating shaft 3, and the stirring discs 4 are uniformly distributed on the rotating shaft 3 along the axial direction of the rotating shaft 3. The power mechanism 5 is an electric motor 51, and the electric motor 51 is fixedly arranged on one side of the frame 1 far away from the cylinder 2. The output shaft of the motor 51 is fixedly connected to the rotary shaft 3 coaxially.
Referring to fig. 3 and 4, the end of the rotary shaft 3 remote from the motor 51 is fixedly mounted with a stepped structure 6. The hierarchical structure 6 includes a fixed flange 61, an impeller plate 62, a shroud 63, a removable flange 64, a bayonet 65, a locking lever 66, and a resistance mechanism 67. The fixed flange 61 is fixedly connected to one end of the rotating shaft 3 far away from the motor 51 through bolts, a plurality of circulation holes 611 are formed in the fixed flange 61, the plurality of circulation holes 611 are uniformly distributed along the circumferential direction of the fixed flange 61, a plurality of impeller plates 62 are fixedly connected to the end face, far away from the motor 51, of the fixed flange 61, and the plurality of impeller plates 62 are uniformly distributed along the circumferential direction of the fixed flange 61.
Referring to fig. 3 and 4, a shroud 63 is fixedly attached to the side of the impeller plate 62 remote from the fixed flange 61, the axis of the shroud 63 coincides with the axis of the fixed flange 61, and a detachable flange 64 is detachably attached to the shroud 63. The detachable flange 64 is provided with a plurality of discharge holes 641, and the discharge holes 641 are symmetrically distributed along the circumferential direction of the detachable flange 64.
Referring to fig. 3 and 4, four insertion holes 642 are formed in the side surface of the detachable flange 64 adjacent to the hoop 63, and the four insertion holes 642 are symmetrically distributed along the circumferential direction of the detachable flange 64. The four inserting rods 65 are horizontally and fixedly connected to the hoop 63, and when the detachable flange 64 is in contact with the hoop 63, the four inserting rods 65 are respectively inserted into the four inserting holes 642.
Referring to fig. 4 and 5, sliding holes 643 are formed in the side surfaces of the insertion holes 642, locking grooves 651 are formed in the insertion rods 65, four locking rods 66 are provided, and the four locking rods 66 are slidably disposed in the four sliding holes 643, respectively. The end of the locking lever 66 near the insert lever 65 is provided with a third inclined surface 662, and the third inclined surface 662 faces the side near the fixing flange 61.
Referring to fig. 4 and 5, a limiting groove 644 is formed in the inner wall of the sliding hole 643, a limiting block 661 is fixedly connected to the locking rod 66, the resistance mechanism 67 includes a thrust spring 671 disposed in the limiting groove 644, one end of the thrust spring 671 abuts against a side surface of the limiting block 661, which is far away from the inserting rod 65, and the other end of the thrust spring 671 abuts against a side wall of the limiting groove 644, which is far away from the inserting rod 65. The locking lever 66 is prevented from sliding in a direction away from the insertion lever 65, and one end of the locking lever 66 is stably inserted into the locking groove 651.
Referring to fig. 4 and 6, a circular groove 645 is formed on a side surface of the detachable flange 64 far away from the fixed flange 61, a sliding hole 643 is communicated with the circular groove 645, one end of a locking rod 66 far away from the inserting rod 65 extends into the circular groove 645, a driving mechanism 68 comprises an unlocking circular plate 681 rotatably arranged in the circular groove 645, a circular yielding groove 6811 is formed on a side surface of the unlocking circular plate 681 near the fixed flange 61, a pushing block 682 is fixedly connected to an inner peripheral wall of the circular yielding groove 6811, a first inclined surface 6821 is arranged on a side surface of the pushing block 682 near an axial lead of the unlocking circular plate 681, a unlocking block 663 is arranged at one end of the locking rod 66 near the circular groove 645, a second inclined surface 6631 which can be in conflict with the first inclined surface 6821 is arranged on the unlocking block 663, and the pushing blocks 682 correspond to the unlocking blocks one by one.
Referring to fig. 4 and 6, a first annular groove 646 is formed in the inner circumferential wall of the circular groove 645, and a blocking ring 684 is fixedly connected to the outer circumferential surface of the unlocking circular plate 681, and the blocking ring 684 is rotatably disposed in the first annular groove 646. A second annular groove 647 is formed in the inner peripheral wall of the circular groove 645, a coil spring 685 is arranged in the second annular groove 647, one end of the coil spring 685 is fixed on the inner peripheral wall of the second annular groove 647, and the other end of the coil spring 685 is fixed on the outer peripheral surface of the unlocking circular plate 681.
Referring to fig. 4, an inner hexagonal groove is formed on a side surface of the unlocking circular plate 681 away from the fixed flange 61, so as to facilitate the rotation of the unlocking circular plate 681.
The implementation principle of the preparation equipment of the ultra-pure iron concentrate provided by the embodiment of the application is as follows: the rotating shaft drives the grading structure 6 to rotate to generate centrifugal force, the centrifugal force naturally concentrates the fine particles towards the axle center area, the coarse particles are thrown towards the edge, because the coarse particles are extruded by upstream coarse and fine particle slurry, qualified product granularity is discharged, and the coarse particles return to upstream along the cylinder wall to be continuously ground until the qualified granularity is reached.
When the unlocking circular plate 681 is rotated, under the interference action of the first inclined surface 6821 and the second inclined surface 6631, the push block 682 can drive the locking rods 66 to slide away from the inserting rods 65 through the unlocking block 663, so that the plurality of locking rods 66 are simultaneously separated from the locking grooves 651 on the inserting rods 65, and the detachable flange 64 is convenient to detach.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (9)
1. The preparation method of the ultra-pure iron concentrate is characterized by comprising the following steps of: s1: fine grinding operation: magnetite concentrate with TFe grade of 68.0+/-0.5% and water content of less than or equal to 8% is slurried in advance to form ore pulp with mass concentration of 45%, and then fed into an moxa sand mill (100) for fine grinding, the grinding concentration of the moxa sand mill (100) is controlled to be about 45%, and the granularity of the product is controlled to be more than 94% in-0.038 mm;
s2: weak magnetic separation-elutriation selection operation: feeding the ground product of the mugwort sand mill (100) into a weak magnetic separator for roughing to obtain weak magnetic separation roughing concentrate, and discharging weak magnetic separation roughing tailings; after demagnetizing the rough concentration ore concentrate with low-intensity magnetic separation, feeding the rough concentration ore concentrate with low-intensity magnetic separation into an electromagnetic elutriator for concentration to obtain concentration ore concentrate with the electromagnetic elutriator, and discharging concentration tailings with the electromagnetic elutriator; the quality concentration of the ore pulp of the bottom flow concentrate selected by the electromagnetic elutriator is controlled to be 50-60%, the weak magnetic separation roughing adopts a permanent magnet cylinder type magnetic separator, the concentrate elutriator is adopted for the concentration, and the magnetic field intensity of the weak magnetic separation roughing is 80mT;
s3: the low-intensity magnetic concentrate is demagnetized and then fed into an electromagnetic elutriator for concentration, the tailings are thrown again, and the concentration of the underflow concentrate of the elutriator is controlled to be 50-60%; diluting the underflow concentrate of the elutriator to 25-30% concentration, and carrying out pre-demagnetization;
s4: reverse flotation operation: demagnetizing the electromagnetic elutriation concentrate, feeding the demagnetizing operation into reverse flotation, adding 1200g/t of regulator sodium carbonate into the reverse flotation rougher, and 130g/t of collector; the reverse flotation is carefully selected, 400g/t of regulator sodium carbonate and 32g/t of collector are added; the reverse flotation operation adopts a one-time roughing and one-time selecting open-circuit process to obtain ultra-pure iron concentrate with TFe grade of 72.2%, siO2 content of 0.13% and acid insoluble content of 0.16%, flotation foam is high-purity iron concentrate with TFe grade of 70.7%, the reverse flotation operation adopts sodium carbonate as a regulator to perform pre-pulping, and then adopts dodecylamine as a collector to perform reverse flotation; preparing a 10% solution by using the regulator, and preparing the collector according to the molar ratio of the dodecyl amine to the glacial acetic acid of 1:1; the medicament system is as follows: coarse dressing regulator amount 1200g/t, collector amount 130g/t, fine dressing regulator amount 400, collector amount 32g/t.
2. The preparation equipment of ultrapure iron ore concentrate is characterized in that: the moxa sand mill (100) in the claim 1 is included, moxa sand mill (100) include frame (1), set up in barrel (2) on frame (1), rotate set up in pivot (3) in barrel (2) and be used for driving pivot (3) pivoted power unit (5), power unit (5) are fixed in on frame (1), be provided with a plurality of agitator disk (4) on pivot (3), hierarchical structure (6) are installed to the tip of pivot (3).
3. The apparatus for preparing ultra-pure iron ore concentrate according to claim 2, wherein: the classifying structure (6) comprises a fixed flange plate (61) fixedly connected to the rotating shaft (3), a plurality of impeller plates (62) fixedly connected to the fixed flange plate (61), a hoop (63) fixedly connected to the side surface of the impeller plates (62) away from the fixed flange plate (61) and a detachable flange plate (64) detachably connected with the hoop (63), a flow hole (611) is formed in the fixed flange plate (61), and a discharge hole (641) is formed in the detachable flange plate (64).
4. The apparatus for preparing ultra-pure iron ore concentrate according to claim 3, wherein: the detachable flange plate (64) is close to a jack (642) is formed in the side face of the hoop (63), a plug rod (65) which can be inserted into the jack (642) is fixedly connected to the hoop (63), a sliding hole (643) is formed in the side face of the jack (642), a locking groove (651) is formed in the plug rod (65), a locking rod (66) with one end capable of being inserted into the locking groove (651) is arranged in the sliding hole (643) in a sliding mode, and a resistance mechanism (67) which is used for blocking the locking rod (66) to slide in the direction away from the plug rod (65) and a driving mechanism (68) which is used for driving the locking rod (66) to slide in the direction away from the plug rod (65) are further arranged on the detachable flange plate (64).
5. The apparatus for preparing ultra-pure iron ore concentrate according to claim 4, wherein: limiting grooves (644) are formed in the inner wall of the sliding hole (643), limiting blocks (661) are fixedly connected to the locking rods (66), the resistance mechanism (67) comprises thrust springs (671) arranged in the limiting grooves (644), one ends of the thrust springs (671) are abutted against the side faces, away from the inserting rods (65), of the limiting blocks (661), and the other ends of the thrust springs (671) are abutted against the side walls, away from the inserting rods (65), of the limiting grooves (644).
6. The apparatus for preparing ultra-pure iron ore concentrate according to claim 4, wherein: the inserting rods (65) are fixedly arranged on the hoops (63), the inserting holes (642) are arranged on the detachable flange plate (64) and are in one-to-one correspondence with the inserting holes (642), round grooves (645) are formed in the side surfaces, away from the fixed flange plate (61), of the detachable flange plate (64), the sliding holes (643) are communicated with the round grooves (645), one ends, away from the inserting rods (65), of the locking rods (66) extend into the round grooves (645), the driving mechanism (68) comprises unlocking circular plates (681) which are rotatably arranged in the round grooves (645), the unlocking circular plate (681) is close to a circular abdication groove (6811) formed in the side face of the fixed flange plate (61), a pushing block (682) is fixedly connected to the inner peripheral wall of the circular abdication groove (6811), a first inclined surface (6821) is arranged on the side face, close to the axial lead of the unlocking circular plate (681), of the pushing block (682), an unlocking block (663) is arranged at one end of the locking rod (66) located in the circular groove (645), and a second inclined surface (6631) which can be in contact with the first inclined surface (6821) is arranged on the unlocking block (663), and the pushing blocks (682) are in one-to-one correspondence with unlocking.
7. The apparatus for preparing ultra-pure iron ore concentrate according to claim 6, wherein: the inner peripheral wall of the circular groove (645) is provided with a first annular groove (646), the outer peripheral surface of the unlocking circular plate (681) is fixedly connected with a baffle ring (684), and the baffle ring (684) is rotatably arranged in the first annular groove (646).
8. The apparatus for preparing ultra-pure iron ore concentrate according to claim 6, wherein: a second annular groove (647) is formed in the inner peripheral wall of the circular groove (645), a coil spring (685) is arranged in the second annular groove (647), one end of the coil spring (685) is fixed on the inner peripheral wall of the second annular groove (647), and the other end of the coil spring (685) is fixed on the outer peripheral surface of the unlocking circular plate (681).
9. The apparatus for preparing ultra-pure iron ore concentrate according to claim 4, wherein: a third inclined surface (662) is formed at the end part, close to the inserted link (65), of the locking rod (66), and the third inclined surface (662) faces to one side, close to the fixed flange (61).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202311550422.1A CN117399172A (en) | 2023-11-16 | 2023-11-16 | Preparation method and equipment of ultrapure iron concentrate |
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| CN202311550422.1A CN117399172A (en) | 2023-11-16 | 2023-11-16 | Preparation method and equipment of ultrapure iron concentrate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117983371A (en) * | 2024-04-03 | 2024-05-07 | 隆化县新村矿业有限公司 | Mineral separation equipment and method for recycling extremely low-grade copper minerals from tailings |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117983371A (en) * | 2024-04-03 | 2024-05-07 | 隆化县新村矿业有限公司 | Mineral separation equipment and method for recycling extremely low-grade copper minerals from tailings |
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