CN114682367B - Grinding and selecting method of vanadium titano-magnetite - Google Patents
Grinding and selecting method of vanadium titano-magnetite Download PDFInfo
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- CN114682367B CN114682367B CN202210348318.3A CN202210348318A CN114682367B CN 114682367 B CN114682367 B CN 114682367B CN 202210348318 A CN202210348318 A CN 202210348318A CN 114682367 B CN114682367 B CN 114682367B
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- magnetite
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 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 27
- 229910052720 vanadium Inorganic materials 0.000 title claims abstract description 27
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 239000012141 concentrate Substances 0.000 claims abstract description 42
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000006148 magnetic separator Substances 0.000 claims abstract description 18
- 229910052742 iron Inorganic materials 0.000 claims abstract description 12
- 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
- 239000002994 raw material Substances 0.000 claims description 3
- BCKXLBQYZLBQEK-KVVVOXFISA-M Sodium oleate Chemical compound [Na+].CCCCCCCC\C=C/CCCCCCCC([O-])=O BCKXLBQYZLBQEK-KVVVOXFISA-M 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
- 239000000126 substance Substances 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 9
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 7
- 239000011707 mineral Substances 0.000 abstract description 7
- 238000011084 recovery Methods 0.000 abstract description 5
- 238000000926 separation method Methods 0.000 abstract description 5
- 238000007885 magnetic separation Methods 0.000 abstract description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- 229910052719 titanium Inorganic materials 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 229910001608 iron mineral Inorganic materials 0.000 description 1
Classifications
-
- 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
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 conventional grinding method is easy to generate overgrinding 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, coarse grinding is carried out on raw ore of vanadium titano-magnetite through a rod mill, and a coarse grinding product is obtained; s2, carrying out rough concentration on the rough grinding product through a weak magnetic separator to obtain rough concentrate and rough tailings; s3, finely grinding the rough concentrate through a ball mill to obtain a fine grinding product, and adding a dispersing agent in the fine grinding process; s4, carrying out primary concentration on the fine grinding product through a low intensity magnetic separator to obtain concentrate and tailings; s5, carrying out secondary concentration on the concentrate through a low intensity magnetic separator to obtain an iron concentrate product and middlings. The method is used for grinding and separating vanadium titano-magnetite, not only can reduce grinding energy consumption, but also can improve magnetic separation efficiency and improve recovery rate of the vanadium titano-magnetite magnetic concentrate.
Description
Technical Field
The invention relates to the field of mineral separation, in particular to a method for grinding vanadium titano-magnetite.
Background
The mineral separation process of the vanadium titano-magnetite comprises crushing, grinding, grading and magnetic separation. The energy consumption in the ore grinding process accounts for more than 70% of the total ore dressing energy consumption of the vanadium titano-magnetite. At present, vanadium titano-magnetite is generally directly ground by a ball mill, and the defects of easy overgrinding and high energy consumption exist.
Disclosure of Invention
The invention provides a grinding and selecting method of vanadium titano-magnetite, which solves the problems that the conventional grinding method is easy to generate overgrinding phenomenon and has high 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, coarse grinding is carried out on the raw ore of the vanadium titano-magnetite through a rod mill, and a coarse grinding product is obtained. Wherein, the grinding concentration of the rough grinding is 60-80 percent, and the grinding time is 5-25 min.
S2, carrying out rough concentration on the rough grinding product through a low intensity magnetic separator to obtain rough concentrate and rough tailings. Wherein the magnetic field intensity of roughing is 2500-3500 OE, and the ore feeding concentration is 20-50%.
S3, finely grinding the rough concentrate through a ball mill to obtain a fine grinding product, and adding a dispersing agent in the fine grinding process. For example, the ball mill is a conical ball mill.
Wherein, the grinding concentration of the fine grinding is 50-70%, and the grinding time is 5-15 min.
Specific: the dispersing agent is at least one of the following substances: sodium hexametaphosphate, sodium oleate, and sodium oxalate. For example, the dispersant is sodium hexametaphosphate, and the ratio of the mass of the sodium hexametaphosphate to the mass of the roughing concentrate is 0.10-1.00%.
S4, carrying out primary concentration on the fine grinding product through a low intensity magnetic separator to obtain concentrate and tailings.
S5, carrying out secondary concentration on the concentrate through a low intensity magnetic separator to obtain an iron concentrate product and middlings.
Further is: the roughing tailings in the S2 and the concentrating tailings in the S4 are used as titanium selecting raw materials of a titanium selecting system.
Further is: 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 second concentration is 20-50%.
Specific: the granularity of the vanadium titano-magnetite raw ore in S1 is less than or equal to 2mm, the TFe content is 26-30%, and TiO is prepared 2 The content is 8-10%; the TFe content of the iron ore concentrate product in S5 is 54-57%.
The beneficial effects of the invention are as follows: the invention not only can reduce the grinding energy consumption, but also can improve the magnetic separation efficiency and the recovery rate of the vanadium titano-magnetite magnetic concentrate. The raw ore of the vanadium titano-magnetite is coarsely ground through a rod mill and finely ground through a ball mill, so that the overgrinding phenomenon in the grinding process is reduced, namely, the mud amount in the grinding process is reduced, the energy consumption in the grinding process is reduced, and the iron loss in the iron separation process of the vanadium titano-magnetite is reduced; meanwhile, the reduction of the mud is beneficial to the subsequent flotation and titanium separation process of vanadium titano-magnetite, so that the loss of titanium is reduced. If the grinding process is serious, iron minerals can enter tailings to be lost in the magnetic separation process. Dispersing agents are added in the fine grinding process, so that the viscosity of ore pulp can be reduced. The dispersing agent is adsorbed on the surface of the mineral, so that the hardness of the mineral can be reduced. In the initial stage of the fine grinding process, the dispersing agent mainly reduces the viscosity of ore pulp, and in the later stage of the fine grinding process, the dispersing agent mainly reduces the hardness of ore, and both effects are beneficial to reducing the ore grinding energy consumption and improving the ore grinding efficiency.
Drawings
FIG. 1 is a schematic flow chart of a grinding and selecting method of vanadium titano-magnetite.
Detailed Description
The invention is further illustrated below with reference to examples.
Example 1
Coarse grinding is carried out on vanadium titano-magnetite raw ore (TFe content is 27.5%) with the particle size less than or equal to 2mm by adopting a rod mill under the condition that the grinding concentration is 60%, and coarse grinding products are obtained after grinding for 15min. And (3) roughing the rough grinding product by adopting a weak magnetic separator under the condition of magnetic field intensity of 3000OE and ore feeding concentration of 30%, so as to obtain roughing concentrate and roughing tailings. And (3) finely grinding the roughing concentrate by adopting a ball mill, wherein the grinding concentration is 70%, the grinding time is 8min, and sodium hexametaphosphate with the mass of 0.60% of the roughing concentrate is added in the grinding process, so that a finely ground product is obtained. The fine grinding product is subjected to primary concentration by adopting a low intensity magnetic separator under the conditions of a magnetic field intensity of 2800OE and a mineral concentration of 30%, and concentrated ore concentrate and concentrated tailings are obtained. And (3) carrying out secondary concentration on the concentrate by adopting a low-intensity magnetic separator under the condition of magnetic field intensity 2200OE and ore feeding concentration of 40%, so as 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
Coarse grinding is carried out on vanadium titano-magnetite raw ore (TFe content is 28.2%) with the particle size less than or equal to 2mm by adopting a rod mill under the condition that the grinding concentration is 65%, and coarse grinding products are obtained after grinding for 18 min. And (3) roughing the rough grinding product by adopting a weak magnetic separator under the condition of magnetic field intensity of 3000OE and ore feeding concentration of 35%, so as to obtain roughing concentrate and roughing tailings. And (3) finely grinding the roughing concentrate by adopting a ball mill, wherein the grinding concentration is 65%, the grinding time is 10min, and sodium hexametaphosphate with the mass of 0.55% of the roughing concentrate is added in the grinding process, so that a finely ground product is obtained. The fine grinding product is subjected to primary concentration by adopting a low intensity magnetic separator under the conditions of magnetic field intensity of 2600OE and ore feeding concentration of 30%, and concentrated ore concentrate and concentrated tailings are obtained. And (3) carrying out secondary concentration on the concentrate by adopting a low intensity magnetic separator under the condition of 2300OE magnetic field intensity and 40% ore feeding concentration, so as 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
Coarse grinding is carried out on vanadium titano-magnetite raw ore (TFe content is 29.1%) with the particle size less than or equal to 2mm by adopting a rod mill under the condition that the grinding concentration is 70%, and coarse grinding products are obtained after 12min grinding. And (3) roughing the rough grinding product by adopting a weak magnetic separator under the conditions of a magnetic field intensity of 2800OE and a mineral feeding concentration of 30%, so as to obtain roughing concentrate and roughing tailings. And (3) finely grinding the roughing concentrate by adopting a ball mill, wherein the grinding concentration is 70%, the grinding time is 6min, and sodium hexametaphosphate with the mass of 0.70% of the roughing concentrate is added in the grinding process, so that a finely ground product is obtained. The fine grinding product is subjected to primary concentration by adopting a low intensity magnetic separator under the conditions of magnetic field intensity of 2700OE and ore feeding concentration of 30%, and concentrated ore concentrate and concentrated tailings are obtained. And (3) carrying out secondary concentration on the concentrate by adopting a low intensity magnetic separator under the condition of 2100OE magnetic field intensity and 40% ore feeding concentration, so as 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 (2)
1. The grinding and selecting method of the vanadium titano-magnetite is characterized by comprising the following steps of: the method comprises the following steps:
s1, carrying out coarse grinding on raw ore of vanadium titano-magnetite by a rod mill, wherein the grinding concentration of the coarse grinding is 60-80%, the grinding time is 5-25 min, and a coarse grinding product is obtained, wherein the granularity of the raw ore of the vanadium titano-magnetite is less than or equal to 2mm, the TFe content is 26-30%, and TiO is obtained 2 The content is 8-10%;
s2, carrying out rough concentration on the rough grinding product through a low intensity magnetic separator, wherein the magnetic field intensity of the rough concentration is 2500-3500 OE, the ore feeding concentration is 20-50%, and rough concentration ore concentrate and rough concentration tailings are obtained and are used as titanium-selecting raw materials of a titanium-selecting system;
s3, finely grinding the rough concentrate through a ball mill, wherein the grinding concentration of the fine grinding is 50-70%, the grinding time is 5-15 min, a fine grinding product is obtained, and a dispersing agent is added in the fine grinding process, wherein the dispersing agent is at least one of the following substances: sodium hexametaphosphate, sodium oleate, and sodium oxalate;
s4, carrying out primary concentration on the finely ground product through a low intensity magnetic separator, wherein the magnetic field strength of the primary concentration is 2500-3000 OE, the ore feeding concentration is 20-50%, and the concentrate and the tailings are obtained and are used as titanium-selecting raw materials of a titanium-selecting system;
s5, carrying out secondary concentration on the concentrate through a low intensity magnetic separator, wherein the magnetic field strength of the secondary concentration is 2000-2500 OE, the ore feeding concentration is 20-50%, and the iron concentrate product and middling are obtained, and the TFe content of the concentrate product is 54-57%.
2. The grinding and selecting method of vanadium titano-magnetite according to claim 1, wherein: in the step S3, the dispersant is sodium hexametaphosphate, and the ratio of the mass of the sodium hexametaphosphate to the mass of the roughing concentrate is 0.10-1.00%.
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| CN202210348318.3A CN114682367B (en) | 2022-04-01 | 2022-04-01 | Grinding and selecting method of vanadium titano-magnetite |
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| CN202210348318.3A CN114682367B (en) | 2022-04-01 | 2022-04-01 | Grinding and selecting method of vanadium titano-magnetite |
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| CN114682367B true CN114682367B (en) | 2023-10-27 |
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