CN114887758B - Stage grinding and selecting process for magnetite ore with sand setting and tailing discarding functions - Google Patents
Stage grinding and selecting process for magnetite ore with sand setting and tailing discarding functions Download PDFInfo
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- CN114887758B CN114887758B CN202210443484.1A CN202210443484A CN114887758B CN 114887758 B CN114887758 B CN 114887758B CN 202210443484 A CN202210443484 A CN 202210443484A CN 114887758 B CN114887758 B CN 114887758B
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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
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
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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
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/10—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with one or a few disintegrating members arranged in the container
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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
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/16—Mills in which a fixed container houses stirring means tumbling the charge
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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
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/20—Disintegrating members
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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
- 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
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- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
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Abstract
The invention relates to a stage grinding and separating process of magnetite ore with sand setting and tailing discarding, which is characterized in that a stage of graded sand setting is fed into a stage magnetic separator for separation, tailings are discarded, concentrate returns to a stage of ball mill to form a stage of semi-closed grinding and grading operation, a stage of graded overflow magnetic separation and tailing discarding are carried out, and concentrate is fed into a second stage of stirring mill; the method comprises the steps of feeding the second-stage classified sand setting into a third-stage magnetic separator for separation, discarding tailings, returning concentrate to a second-stage stirring mill to form a second-stage semi-closed grinding classification operation, and separating a second-stage classified overflow product through three times of continuous magnetic separation to obtain the final concentrate with the grade of 65-70% and the recovery rate of 85-90%, wherein the method has the advantages that: 1) Discarding the first-stage graded sand setting tailings, wherein the yield is more than 5%, and the treatment capacity of the first-stage mill is improved; 2) Discarding the two-stage classified sand setting tailings, and improving the treatment capacity of the two-stage mill, wherein the yield of the two-stage classified sand setting tailings is more than 10 percent.
Description
Technical Field
The invention belongs to the technical field of mineral processing, and particularly relates to a magnetite ore stage grinding and selecting process with sand setting and tailing discarding functions.
Background
Grinding is the most important link in the mineral separation process, and the function of the grinding is to provide proper feeding granularity for the subsequent sorting operation, and to measure whether the ground mineral product is qualified or not and whether the useful mineral reaches sufficient monomer dissociation or not. At present, the ore grinding operation in the magnetite ore grinding and sorting process mainly adopts closed circuit ore grinding and grading operation, and the graded sand setting products in the closed circuit ore grinding and grading operation are all returned to the ball mill for re-grinding. Actual production data show that a lot of gangue minerals which are dissociated in a single body exist in the classified sand setting product, so that the obvious problem exists in the closed-circuit grinding classification operation of magnetite, namely, all gangue minerals which are dissociated in the classified sand setting product are returned to a grinding machine for regrinding, on one hand, the cyclic bad load of the ball mill is increased, the processing capacity of the grinding machine is reduced, on the other hand, the grinding efficiency is influenced, the unnecessary energy consumption is increased, and the principle of 'throwing and early throwing' of tailings is not met. Therefore, if gangue minerals dissociated by the monomers in the closed-circuit ore grinding and classifying operation of magnetite can be thrown away in advance through separation and cannot be returned to a mill for regrinding, the circulating load of the mill can be effectively reduced, the new ore feeding treatment capacity of an ore grinding system is increased, energy is saved, consumption is reduced, and finally the purposes of improving the yield and efficiency of enterprises are achieved.
Disclosure of Invention
The invention aims to provide a magnetite ore stage grinding and selecting process with sand setting and tailing discarding functions, so as to realize timely coarse grain tailing discarding, save energy and reduce consumption, reduce the circulating load of a mill and improve the processing capacity and the grinding efficiency of the mill.
The invention aims at realizing the following technical scheme:
the invention relates to a magnetite ore stage grinding and selecting process with sand setting and tail discarding, which comprises the following steps:
step 1, raw ore with 27% -32% of grade and-12 mm of granularity is fed into a first-stage ball mill for ore grinding, ore discharge of the first-stage ball mill is fed into a first-stage cyclone for classification, and a first-stage classified overflow product with 50% -65% of-200 meshes and a first-stage classified sand setting product with 30% -45% of-200 meshes are obtained, and the process is characterized by further comprising the following steps:
step 2, feeding the first-stage classified sand setting product into a first-stage magnetic separator for sorting, discarding tailings of the first-stage magnetic separator, and returning concentrate of the first-stage magnetic separator to a first-stage ball mill to form semi-closed grinding for first-stage grinding and grading operation;
step 3, feeding the first-stage classified overflow product into a second-stage magnetic separator for separation, discarding tailings of the second-stage magnetic separator, and taking concentrate of the second-stage magnetic separator as ore feeding for the second-stage ore grinding and classifying operation;
step 4, feeding the concentrate of the second-stage magnetic separator into a second-stage stirring mill for grinding, discharging the concentrate of the second-stage stirring mill into a second-stage cyclone for classification, and obtaining a second-stage classification overflow product with the content of-200 meshes of 80% -95% and a second-stage classification sand setting product with the content of-200 meshes of 45% -65%;
step 5, feeding the two-stage classified sand setting product into a three-stage magnetic separator for sorting, discarding tailings of the three-stage magnetic separator, and returning concentrate of the three-stage magnetic separator to a two-stage stirring mill to form semi-closed grinding for two-stage grinding and classifying operation;
and 6, feeding the two-stage classified overflow product into a four-stage magnetic separator for separation, feeding concentrate from the four-stage magnetic separator into a five-stage magnetic separator for separation, feeding concentrate from the five-stage magnetic separator into a six-stage magnetic separator for separation, and taking the concentrate from the six-stage magnetic separator as final concentrate, wherein the grade of the final concentrate is 65% -70%, the recovery rate is 85% -90%, and the yield is 30% -40%.
And 7, combining the first-stage magnetic separator tailings, the second-stage magnetic separator tailings, the third-stage magnetic separator tailings, the fourth-stage magnetic separator tailings, the fifth-stage magnetic separator tailings and the sixth-stage magnetic separator tailings into final tailings, wherein the grade of the final tailings is 7% -11%, the recovery rate is 10% -15%, and the yield is 60% -70%.
Further, the magnetite raw ore contains chemical elements and mass fractions of the elements: TFe 25% -32%, siO 2 28%~32%，Al 2 O 3 0.6% -1.0%, 4% -6% of CaO, 0.7% -1.0% of MgO, 0.05% -0.08% of S, 0.01% -0.04% of P and the balance of oxygen and other impurity components.
Further, ceramic balls are selected as stirring grinding media, the grinding mode is wet grinding, and the ball ratio is 0.5-0.9: 1, the medium filling rate is 60% -90%, the edge linear speed of the stirrer is 3-6 m/s, and the grinding concentration is 50% -80%.
Further, the first-stage magnetic separation equipment adopts a cylinder magnetic separator, and the magnetic field strength is 800 Oe-1500 Oe. The two-stage magnetic separation equipment adopts a cylindrical magnetic separator, and the magnetic field strength is 1500 Oe-2500 Oe. The magnetic field intensity of three sections is 1500 Oe-2500 Oe, the magnetic field intensity of four sections is 2000 Oe-2800 Oe, the magnetic field intensity of five sections is 1200 Oe-2000 Oe, and the magnetic field intensity of six sections is 600 Oe-1200 Oe.
Compared with the prior art, the invention has the advantages that:
1) The magnetite ore stage grinding and selecting process with sand setting and tail discarding can discard more than 5% of the yield of qualified tailings of the first stage of classified sand setting, reduce the sand setting return quantity of the first stage of hydrocyclone, reduce the circulating load of the first stage of ball mill and improve the first stage of ore grinding treatment capacity;
2) The magnetite ore stage grinding and selecting process with sand setting and tail discarding can discard the qualified tailings of the two-stage classified sand setting by more than 10 percent, reduce the sand setting return quantity of the two-stage hydrocyclone, reduce the circulating load of the two-stage stirring mill and improve the processing capacity of the two-stage grinding;
3) The stirring mill is adopted to replace a fine grinding ball mill, so that the energy consumption can be obviously reduced, and the grinding electricity consumption is saved by more than 30%;
4) The ceramic ball milling damage degree in the stirring mill is smaller than the steel ball abrasion degree in the ball mill, and the ball consumption cost is saved by more than 50%.
Drawings
Fig. 1 is a quality flow chart of the number of the grinding and selecting processes in the magnetite stage with sand setting and tail casting according to the first embodiment.
Fig. 2 is a quality flow chart of the number of grinding processes in the magnetite stage with sand setting and tailing casting in the second embodiment.
Detailed Description
The invention is further described below with reference to the drawings and examples.
Example 1
As shown in FIG. 1, the magnetite ore stage grinding process with sand setting and tailing discarding functions comprises the following steps:
step 1, raw ore with the grade of 28.36% and the granularity of-12 mm is fed into a first-stage ball mill for ore grinding, ore discharge of the first-stage ball mill is fed into a first-stage cyclone for classification, and a first-stage classified overflow product with the mesh content of-200 being 53.49% and a first-stage classified sand setting product with the mesh content of-200 being 38.45% are obtained, and the process further comprises the following steps:
and 2, feeding the first-stage classified sand setting product into a first-stage magnetic separator for separation, discarding tailings of the first-stage magnetic separator, wherein the grade of the first-stage magnetic separator tailings is 6.04%, and the yield is 6.64%. The concentrate of the first-stage magnetic separator returns to the first-stage ball mill to form semi-closed circuit grinding of the first-stage grinding classification operation;
and 3, feeding the first-stage classified overflow product into a second-stage magnetic separator for separation, and discarding tailings of the second-stage magnetic separator, wherein the tailings grade of the second-stage magnetic separator is 1.58%, and the yield is 26.54%. The concentrate of the second-stage magnetic separator is used as ore feeding for the second-stage ore grinding and grading operation;
step 4, feeding the concentrate of the second-stage magnetic separator into a second-stage stirring mill for grinding, discharging the concentrate of the second-stage stirring mill into a second-stage cyclone for classification, and obtaining a second-stage classification overflow product with the mesh content of-200 being 84.12% and a second-stage classification sand setting product with the mesh content of-200 being 63.78%;
and 5, feeding the two-stage classified sand setting product into a three-stage magnetic separator for separation, discarding tailings of the three-stage magnetic separator, wherein the grade of the three-stage magnetic separation tailings is 5.70%, and the yield is 18.25%. The concentrate of the three-stage magnetic separator returns to the two-stage stirring mill to form semi-closed circuit grinding for two-stage grinding classification operation;
step 6, feeding the two-stage classified overflow product into a four-stage magnetic separator for separation, feeding concentrate of the four-stage magnetic separator into a five-stage magnetic separator for separation, feeding concentrate of the five-stage magnetic separator into a six-stage magnetic separator for separation, and obtaining concentrate of the six-stage magnetic separator as final concentrate, wherein the grade of the final concentrate is 68.71%, the recovery rate is 88.25%, and the yield is 33.69%;
step 7, combining the first-stage magnetic separator tailings, the second-stage magnetic separator tailings, the third-stage magnetic separator tailings, the fourth-stage magnetic separator tailings, the fifth-stage magnetic separator tailings and the sixth-stage magnetic separator tailings into final tailings, wherein the grade of the final tailings is 7.86%, and the recovery rate is 11.75%. The yield was 66.31%.
Wherein the concentration of the stirred ore grinding is 50%, the filling rate of the stirred ore grinding volume is 80%, the ball ratio is 0.8, the added ore grinding medium is ceramic balls, and the linear speed of the stirring mill edge is 3m/s. The magnetic field intensity of the first-stage magnetic separator is 1500Oe, and the magnetic field intensity of the second-stage magnetic separator is 2000Oe. The magnetic field intensity of the three-section magnetic separator is 2200Oe, the magnetic field intensity of the four-section magnetic separator is 2400Oe, the magnetic field intensity of the five-section magnetic separator is 1800Oe, and the magnetic field intensity of the six-section magnetic separator is 1000Oe.
Example two
As shown in fig. 2, the process of embodiment 1 of grinding and separating magnetite ore with sand setting and tailing discarding is adopted, and the grinding and magnetic separation method is identical to that of embodiment 1, except that:
(1) The grade of the whole iron of the raw ore is 31.13 percent,
(2) The content of the first-stage graded overflow product-200 meshes is 55.57%, and the content of the second-stage graded overflow product-200 meshes is 86.33%. And finally obtaining the TFe grade 69.11 percent in the magnetic concentrate, wherein the recovery rate is 88.09 percent, and the yield is 36.10 percent. The grade of the final tailings was 9.67%, the recovery rate was 11.91% and the yield was 63.90%.
Claims (4)
1. A magnetite ore stage grinding and selecting process with sand setting and tailing discarding comprises the following steps:
step 1, raw ore with 27% -32% of grade and-12 mm of granularity is fed into a first-stage ball mill for ore grinding, ore discharge of the first-stage ball mill is fed into a first-stage cyclone for classification, and a first-stage classified overflow product with 50% -65% of-200 meshes and a first-stage classified sand setting product with 30% -45% of-200 meshes are obtained, and the process is characterized by further comprising the following steps:
step 2, feeding the first-stage classified sand setting product into a first-stage magnetic separator for sorting, discarding tailings of the first-stage magnetic separator, and returning concentrate of the first-stage magnetic separator to a first-stage ball mill to form semi-closed grinding for first-stage grinding and grading operation;
step 3, feeding the first-stage classified overflow product into a second-stage magnetic separator for separation, discarding tailings of the second-stage magnetic separator, and taking concentrate of the second-stage magnetic separator as ore feeding for the second-stage ore grinding and classifying operation;
step 4, feeding the concentrate of the second-stage magnetic separator into a second-stage stirring mill for grinding, discharging the concentrate of the second-stage stirring mill into a second-stage cyclone for classification, and obtaining a second-stage classification overflow product with the content of-200 meshes of 80% -95% and a second-stage classification sand setting product with the content of-200 meshes of 45% -65%;
step 5, feeding the two-stage classified sand setting product into a three-stage magnetic separator for sorting, discarding tailings of the three-stage magnetic separator, and returning concentrate of the three-stage magnetic separator to a two-stage stirring mill to form semi-closed grinding for two-stage grinding and classifying operation;
step 6, feeding the two-stage classified overflow product into a four-stage magnetic separator for separation, feeding concentrate of the four-stage magnetic separator into a five-stage magnetic separator for separation, feeding concentrate of the five-stage magnetic separator into a six-stage magnetic separator for separation, and taking concentrate of the six-stage magnetic separator as final concentrate, wherein the grade of the final concentrate is 65% -70%, the recovery rate is 85% -90%, and the yield is 30% -40%;
and 7, combining the first-stage magnetic separator tailings, the second-stage magnetic separator tailings, the third-stage magnetic separator tailings, the fourth-stage magnetic separator tailings, the fifth-stage magnetic separator tailings and the sixth-stage magnetic separator tailings into final tailings, wherein the grade of the final tailings is 7% -11%, the recovery rate is 10% -15%, and the yield is 60% -70%.
2. The magnetite ore stage grinding and selecting process with sand setting and tailing discarding functions according to claim 1, wherein the magnetite ore contains chemical elements and mass fractions of the elements: 25% -32% of TFe, 28% -32% of SiO2, 0.6% -1.0% of Al2O3, 4% -6% of CaO, 0.7% -1.0% of MgO, 0.05% -0.08% of S, 0.01% -0.04% of P and the balance of oxygen and other impurity components.
3. The process for grinding and selecting the magnetite ore with the sand setting and tailing discarding functions according to claim 1, wherein the stirring grinding medium is ceramic balls, the grinding mode is wet grinding, and the ball ratio is 0.5-0.9: 1, the medium filling rate is 60% -90%, the edge linear speed of the stirrer is 3-6 m/s, and the grinding concentration is 50% -80%.
4. The process for grinding and selecting the magnetite ore with the sand setting and tailing discarding functions according to claim 1, wherein a section of magnetic separation equipment adopts a cylinder magnetic separator, and the magnetic field strength is 800 Oe-1500 Oe; the second-stage magnetic separation equipment adopts a cylindrical magnetic separator, and the magnetic field strength is 1500 Oe-2500 Oe; the magnetic field intensity of three sections is 1500 Oe-2500 Oe, the magnetic field intensity of four sections is 2000 Oe-2800 Oe, the magnetic field intensity of five sections is 1200 Oe-2000 Oe, and the magnetic field intensity of six sections is 600 Oe-1200 Oe.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101530824A (en) * | 2009-04-14 | 2009-09-16 | 金易通科技（北京）有限公司 | A coal dressing method and system of four-product jigging primary cleaning, secondary head coal small simplified heavy medium reelecting |
| AU2019100569A4 (en) * | 2019-05-29 | 2019-08-01 | Vanadia Pty Ltd | This is an extraction process which maximises resource utilisation by pre-concentrating vanadium oxides from overburden above a metal deposit and from vanadium - bearing iron ore deposits. |
| CN112808447A (en) * | 2021-01-27 | 2021-05-18 | 鞍钢集团矿业设计研究院有限公司 | Grading grinding and selecting process for lean hematite pre-selection coarse-grained concentrate |
| CN113260725A (en) * | 2018-11-14 | 2021-08-13 | 铁桥运营私人有限公司 | Method and apparatus for processing magnetite |
| CN113333158A (en) * | 2021-04-26 | 2021-09-03 | 安徽金日晟矿业有限责任公司 | Flotation-free mineral separation and recovery process for mixed iron ore |
| CN113385299A (en) * | 2021-05-28 | 2021-09-14 | 鞍钢集团矿业有限公司 | Magnetic-gravity-magnetic combined ore dressing process for treating lean magnetite ore |
-
2022
- 2022-04-26 CN CN202210443484.1A patent/CN114887758B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101530824A (en) * | 2009-04-14 | 2009-09-16 | 金易通科技（北京）有限公司 | A coal dressing method and system of four-product jigging primary cleaning, secondary head coal small simplified heavy medium reelecting |
| CN113260725A (en) * | 2018-11-14 | 2021-08-13 | 铁桥运营私人有限公司 | Method and apparatus for processing magnetite |
| AU2019100569A4 (en) * | 2019-05-29 | 2019-08-01 | Vanadia Pty Ltd | This is an extraction process which maximises resource utilisation by pre-concentrating vanadium oxides from overburden above a metal deposit and from vanadium - bearing iron ore deposits. |
| CN112808447A (en) * | 2021-01-27 | 2021-05-18 | 鞍钢集团矿业设计研究院有限公司 | Grading grinding and selecting process for lean hematite pre-selection coarse-grained concentrate |
| CN113333158A (en) * | 2021-04-26 | 2021-09-03 | 安徽金日晟矿业有限责任公司 | Flotation-free mineral separation and recovery process for mixed iron ore |
| CN113385299A (en) * | 2021-05-28 | 2021-09-14 | 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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