CN114682367A - Grinding and selecting method of vanadium titano-magnetite - Google Patents
Grinding and selecting method of vanadium titano-magnetite Download PDFInfo
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- CN114682367A CN114682367A CN202210348318.3A CN202210348318A CN114682367A CN 114682367 A CN114682367 A CN 114682367A CN 202210348318 A CN202210348318 A CN 202210348318A CN 114682367 A CN114682367 A CN 114682367A
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- magnetite
- vanadium titano
- concentrate
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- 238000000227 grinding Methods 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 42
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 229910052720 vanadium Inorganic materials 0.000 title claims abstract description 34
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 239000012141 concentrate Substances 0.000 claims abstract description 41
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000006148 magnetic separator Substances 0.000 claims abstract description 18
- 229910052742 iron Inorganic materials 0.000 claims abstract description 13
- 239000002270 dispersing agent Substances 0.000 claims abstract description 11
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 9
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 9
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 9
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 6
- 239000010936 titanium Substances 0.000 claims description 6
- 229910052719 titanium Inorganic materials 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 5
- BCKXLBQYZLBQEK-KVVVOXFISA-M Sodium oleate Chemical compound [Na+].CCCCCCCC\C=C/CCCCCCCC([O-])=O BCKXLBQYZLBQEK-KVVVOXFISA-M 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- ZNCPFRVNHGOPAG-UHFFFAOYSA-L sodium oxalate Chemical compound [Na+].[Na+].[O-]C(=O)C([O-])=O ZNCPFRVNHGOPAG-UHFFFAOYSA-L 0.000 claims description 2
- 229940039790 sodium oxalate Drugs 0.000 claims description 2
- 238000003801 milling Methods 0.000 claims 8
- 238000005265 energy consumption Methods 0.000 abstract description 9
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 5
- 239000011707 mineral Substances 0.000 abstract description 5
- 238000011084 recovery Methods 0.000 abstract description 5
- 238000007885 magnetic separation Methods 0.000 abstract description 4
- 238000000926 separation method Methods 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 229910001608 iron mineral Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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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
- B02C21/00—Disintegrating plant with or without drying of the material
-
- 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
-
- 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
- B02C23/06—Selection or use of additives to aid disintegrating
-
- 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
-
- 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
- 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
- B03C2201/00—Details of magnetic or electrostatic separation
- B03C2201/20—Magnetic separation whereby the particles to be separated are in solid form
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a grinding and selecting method of vanadium titano-magnetite, relates to the field of mineral separation, and solves the problems that the existing grinding method is easy to generate over-grinding phenomenon and high in energy consumption. The technical scheme adopted by the invention is as follows: the grinding and selecting method of the vanadium titano-magnetite comprises the following steps: s1, carrying out coarse grinding on the vanadium titano-magnetite raw ore through a rod mill to obtain a coarse grinding product; s2, performing rough concentration on the rough-ground product through a low-intensity magnetic separator to obtain rough-concentration concentrate and rough-concentration tailings; s3, performing fine grinding on the roughed concentrate through a ball mill to obtain a fine ground product, and adding a dispersing agent in the fine grinding process; s4, carrying out first concentration on the fine ground product through a low-intensity magnetic separator to obtain concentrated concentrate and concentrated tailings; and S5, carrying out secondary concentration on the concentrated concentrate through a low-intensity magnetic separator to obtain an iron concentrate product and middlings. The method is used for grinding and selecting the vanadium titano-magnetite, can reduce the grinding energy consumption, can improve the magnetic separation efficiency, and improves the recovery rate of the magnetic concentrate of the vanadium titano-magnetite.
Description
Technical Field
The invention relates to the field of mineral separation, in particular to a method for grinding and separating vanadium titano-magnetite.
Background
The mineral separation process of the vanadium titano-magnetite comprises crushing, grinding, grading and magnetic separation. The energy consumption of the ore grinding process accounts for more than 70 percent of the total energy consumption of the vanadium titano-magnetite ore dressing. At present, vanadium titano-magnetite usually directly grinds the ore through the ball mill, has the easy phenomenon of overgrinding that appears to and the energy consumption is high not enough.
Disclosure of Invention
The invention provides a grinding and selecting method of vanadium titano-magnetite, which solves the problems that the existing grinding method is easy to generate over-grinding phenomenon and high in energy consumption.
The technical scheme adopted by the invention is as follows: the grinding and selecting method of the vanadium titano-magnetite comprises the following steps:
and S1, carrying out coarse grinding on the vanadium titano-magnetite raw ore through a rod mill to obtain a coarse ground product. Wherein the concentration of the coarse grinding is 60-80%, and the grinding time is 5-25 min.
And S2, performing rough concentration on the rough-ground product through a low-intensity magnetic separator to obtain rough-concentration concentrate and rough-concentration tailings. Wherein the magnetic field intensity of the roughing is 2500-3500 OE, and the ore feeding concentration is 20-50%.
And S3, performing fine grinding on the roughed concentrate through a ball mill to obtain a fine ground product, and adding a dispersing agent in the fine grinding process. For example, the ball mill is a conical ball mill.
Wherein the ore grinding concentration of the fine grinding is 50-70%, and the ore grinding time is 5-15 min.
Specifically, the method comprises the following steps: the dispersant is at least one of the following substances: sodium hexametaphosphate, sodium oleate and sodium oxalate. For example, the dispersing agent is sodium hexametaphosphate, and the ratio of the mass of the sodium hexametaphosphate to the mass of the roughed concentrate is 0.10-1.00%.
S4, carrying out first concentration on the fine ground product through a low-intensity magnetic separator to obtain concentrated concentrate and concentrated tailings.
And S5, carrying out secondary concentration on the concentrated concentrate through a low-intensity magnetic separator to obtain an iron concentrate product and middlings.
Further, the method comprises the following steps: the rougher tailings in the S2 and the cleaner tailings in the S4 are used as titanium selection raw materials of a titanium selection system.
Further, the method comprises the following steps: the magnetic field intensity of the first concentration is 2500-3000 OE, the magnetic field intensity of the second concentration is 2000-2500 OE, and the ore feeding concentration of the first concentration and the ore feeding concentration of the second concentration are both 20-50%.
Specifically, the method comprises the following steps: the particle size of the vanadium titano-magnetite raw ore in S1 is less than or equal to 2mm, the TFe content is 26-30%, and TiO2The content is 8-10%; the TFe content of the iron ore concentrate product in the S5 is 54-57%.
The invention has the beneficial effects that: the method can reduce the ore grinding energy consumption, improve the magnetic separation efficiency and improve the recovery rate of the magnetic concentrate of the vanadium titano-magnetite. The raw vanadium titano-magnetite ore is coarsely ground by a rod mill and finely ground by a ball mill, so that the over-grinding phenomenon in the ore grinding process is reduced, namely, the argillization amount in the ore grinding process is reduced, the energy consumption in the ore grinding process is reduced, and the iron loss in the iron selection process of the vanadium titano-magnetite ore is reduced; meanwhile, the reduction of argillization is beneficial to the subsequent titanium separation process of vanadium titano-magnetite flotation, thereby reducing the loss of titanium. If the argillization is serious in the ore grinding process, iron minerals can enter tailings to be lost in the magnetic separation process. The dispersant is added in the fine grinding process, so that the viscosity of the ore pulp can be reduced. The dispersant is adsorbed on the surface of the mineral, so that the hardness of the mineral can be reduced. The dispersant mainly reduces the viscosity of ore pulp at the initial stage of the fine grinding process, and the dispersant mainly reduces the hardness of ore at the later stage of the fine grinding process, so that the two effects are favorable for reducing the energy consumption of ore grinding and improving the efficiency of ore grinding.
Drawings
FIG. 1 is a schematic flow chart of the grinding and dressing method of vanadium titano-magnetite according to the present invention.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
Under the condition of ore grinding concentration of 60%, coarse grinding is carried out on vanadium titano-magnetite raw ore (TFe content of 27.5%) with the particle size of less than or equal to 2mm by a rod mill for 15min to obtain a coarse ground product. And (3) carrying out rough concentration on the rough-ground product by adopting a low-intensity magnetic separator under the conditions of 3000OE of magnetic field intensity and 30% of ore feeding concentration to obtain rough-concentration concentrate and rough-concentration tailings. And (3) performing fine grinding on the rough concentrate by using a ball mill, wherein the grinding concentration is 70%, the grinding time is 8min, and sodium hexametaphosphate with the mass being 0.60% of the mass of the rough concentrate is added in the grinding process to obtain a fine ground product. And (3) carrying out first concentration on the fine ground product by adopting a low-intensity magnetic separator under the conditions of the magnetic field intensity of 2800OE and the ore feeding concentration of 30% to obtain concentrated concentrate and concentrated tailings. And carrying out secondary concentration on the concentrated concentrate by adopting a low-intensity magnetic separator under the conditions of magnetic field intensity 2200OE and feeding concentration of 40% to obtain an iron concentrate product and middlings. Through detection, the TFe content of the iron ore concentrate product is 54.4%, and the TFe recovery rate is 73.52%.
Example 2
Under the condition of ore grinding concentration of 65%, coarse grinding is carried out on vanadium titano-magnetite raw ore (TFe content 28.2%) with the particle size of less than or equal to 2mm by a rod mill for 18min to obtain a coarse ground product. And (3) carrying out rough concentration on the rough-ground product by adopting a low-intensity magnetic separator under the conditions of 3000OE of magnetic field intensity and 35% of ore feeding concentration to obtain rough-concentrated ore and rough-concentrated tailings. And (3) performing fine grinding on the rough concentrate by adopting a ball mill, wherein the grinding concentration is 65%, the grinding time is 10min, and sodium hexametaphosphate with the mass being 0.55% of that of the rough concentrate is added in the grinding process to obtain a fine ground product. And (3) carrying out first concentration on the fine ground product by adopting a low-intensity magnetic separator under the conditions of magnetic field intensity 2600OE and ore feeding concentration of 30% to obtain concentrated concentrate and concentrated tailings. And (3) carrying out secondary concentration on the concentrated concentrate by adopting a low-intensity magnetic separator under the conditions of magnetic field intensity 2300OE and feeding concentration of 40% to obtain an iron concentrate product and middlings. Through detection, the TFe content of the iron ore concentrate product is 54.4%, and the TFe recovery rate is 72.15%.
Example 3
And (3) carrying out coarse grinding on the vanadium titano-magnetite raw ore (TFe content is 29.1%) with the particle size of less than or equal to 2mm by using a rod mill under the condition of grinding concentration of 70%, and grinding for 12min to obtain a coarse ground product. And (3) roughly selecting the rough grinding product by adopting a low-intensity magnetic separator under the conditions of magnetic field intensity 2800OE and ore feeding concentration of 30% to obtain roughly selected concentrate and roughly selected tailings. And (3) performing fine grinding on the rough concentrate by adopting a ball mill, wherein the grinding concentration is 70%, the grinding time is 6min, and sodium hexametaphosphate with the mass being 0.70% of the mass of the rough concentrate is added in the grinding process to obtain a fine ground product. And (3) carrying out first concentration on the fine ground product by adopting a low-intensity magnetic separator under the conditions of magnetic field intensity 2700OE and ore feeding concentration 30% to obtain concentrated concentrate and concentrated tailings. And carrying out secondary concentration on the concentrated concentrate by adopting a low-intensity magnetic separator under the conditions of the magnetic field intensity of 2100OE and the ore feeding concentration of 40% to obtain an iron concentrate product and middlings. Through detection, the TFe content of the iron ore concentrate product is 55.2%, and the TFe recovery rate is 71.35%.
Claims (9)
1. The grinding and selecting method of the vanadium titano-magnetite is characterized in that: the method comprises the following steps:
s1, carrying out coarse grinding on the vanadium titano-magnetite raw ore through a rod mill to obtain a coarse grinding product;
s2, carrying out rough concentration on the rough-ground product through a low-intensity magnetic separator to obtain rough-concentration concentrate and rough-concentration tailings;
s3, performing fine grinding on the roughed concentrate through a ball mill to obtain a fine ground product, and adding a dispersing agent in the fine grinding process;
s4, carrying out first concentration on the fine ground product through a low-intensity magnetic separator to obtain concentrated concentrate and concentrated tailings;
and S5, carrying out secondary concentration on the concentrated concentrate through a low-intensity magnetic separator to obtain an iron concentrate product and middlings.
2. The method for milling and selecting vanadium titano-magnetite as claimed in claim 1, wherein: in step S1, the concentration of the coarse grinding is 60-80%, and the grinding time is 5-25 min.
3. The method for milling and selecting vanadium titano-magnetite as claimed in claim 1, wherein: in step S2, the magnetic field intensity of rough concentration is 2500-3500 OE, and the ore feeding concentration is 20-50%.
4. The method for milling and selecting vanadium titano-magnetite as claimed in claim 1, wherein: in step S3, the concentration of the finely ground ore is 50-70%, and the grinding time is 5-15 min.
5. The method for milling and selecting vanadium titano-magnetite as claimed in claim 1, wherein: in step S3, the dispersant is at least one of the following: sodium hexametaphosphate, sodium oleate and sodium oxalate.
6. The method for milling and selecting vanadium titano-magnetite as claimed in claim 5, wherein: in step S3, the dispersing agent is sodium hexametaphosphate, and the ratio of the mass of the sodium hexametaphosphate to the mass of the roughed concentrate is 0.10-1.00%.
7. The method for milling and beneficiation of vanadium titano-magnetite according to any one of claims 1 to 6, wherein: the rougher tailings in the step S2 and the cleaner tailings in the step S4 are used as titanium selection raw materials of a titanium selection system.
8. The method for milling and dressing vanadium titano-magnetite according to any one of claims 1 to 6, characterized in that: the magnetic field intensity of the first concentration is 2500-3000 OE, the magnetic field intensity of the second concentration is 2000-2500 OE, and the ore feeding concentration of the first concentration and the ore feeding concentration of the second concentration are both 20-50%.
9. The method for milling and selecting vanadium titano-magnetite as claimed in claim 8, wherein: the particle size of the vanadium titano-magnetite raw ore in the step S1 is less than or equal to 2mm, the TFe content is 26-30%, and TiO is2The content is 8-10%; the TFe content of the iron ore concentrate product in the step S5 is 54-57%.
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