CN114700157A - Preselection method of vanadium titano-magnetite - Google Patents
Preselection method of vanadium titano-magnetite Download PDFInfo
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- CN114700157A CN114700157A CN202210357102.3A CN202210357102A CN114700157A CN 114700157 A CN114700157 A CN 114700157A CN 202210357102 A CN202210357102 A CN 202210357102A CN 114700157 A CN114700157 A CN 114700157A
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- throwing
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- magnetite
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/10—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
- B02C23/12—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone with return of oversize material to crushing or disintegrating zone
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
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Abstract
The invention discloses a preselecting method of vanadium titano-magnetite, relates to the field of ore dressing, and aims to reduce ore grinding energy consumption and improve the grade of subsequent ore dressing raw materials. The technical scheme adopted by the invention is as follows: the pre-separation method of the vanadium titano-magnetite comprises the steps of firstly carrying out primary crushing on raw ore of the vanadium titano-magnetite, then carrying out middle crushing, then screening a middle-crushed product, returning an oversize product to carry out middle crushing again, and carrying out dry-type tailing discarding on an undersize product through a magnetic drum to obtain dry-cast concentrate and dry-cast tailing; and carrying out intermediate crushing on the dry-throwing concentrate, then carrying out fine crushing, screening the fine crushed product, returning the product on the screen to carry out intermediate crushing again, carrying out wet-type tail throwing on the product under the screen by a gravity magnetic pulling magnetic separator to obtain wet-throwing concentrate and wet-throwing tailings, and taking the wet-throwing concentrate as a grinding and selecting raw material. The method adopts a mode of combining dry type tailing discarding and wet type tailing discarding to pre-select the low-grade vanadium titano-magnetite raw ore, and the finally obtained wet-discarded concentrate is used as a grinding and selecting raw material, so that the grinding amount can be greatly reduced.
Description
Technical Field
The invention relates to the field of mineral separation, in particular to a method for preselecting 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% of the total energy consumption of the vanadium titano-magnetite ore dressing, and the ore is pre-selected in the early stage, so that the ore entering into the ore grinding can be reduced, the grade of the selected iron ore can be improved, and the energy consumption of subsequent ore dressing is reduced. At present, a primary dry-type tailing discarding method is mostly adopted for low-grade vanadium titano-magnetite pre-selection, the grade of the tailing discarding concentrate TFe is improved by about 4 percent, and the recovery rate of TFe is about 70 percent.
Disclosure of Invention
The invention provides a preselecting method of vanadium titano-magnetite, and aims to reduce ore grinding energy consumption and improve the grade of subsequent ore dressing raw materials.
The technical scheme adopted by the invention is as follows: a method for pre-selecting vanadium titano-magnetite comprising the steps of:
s1, performing primary crushing on the vanadium titano-magnetite raw ore, then performing intermediate crushing, screening the intermediate crushed product, returning the product on the screen to perform intermediate crushing again, and performing dry tailing discarding on the product under the screen through a magnetic drum to obtain dry thrown concentrate and dry thrown tailing.
Wherein in S1, the particle size of the product on the sieve is more than or equal to 75 mm.
In S1, the magnetic field intensity of the dry type tailing throwing is 3000-5500 OE, the belt speed is 1.0-2.0 m/S, and the ore feeding speed is 1.5-2.5 t/h.
S2, performing intermediate crushing on the dry cast concentrate, then performing fine crushing, screening the fine crushed product, returning the product on the screen to perform intermediate crushing again, performing wet tail throwing on the product under the screen through a gravity magnetic pull magnetic separator to obtain wet cast concentrate and wet cast tailings, and taking the wet cast concentrate as a grinding and selecting raw material.
Wherein, in S2, the particle size of the product on the sieve is more than or equal to 10 mm.
In S2, the magnetic field intensity of wet type tailing throwing is 5500-7500 OE, the rotating speed of a cylinder of the heavy magnetic pulling magnetic separator is 10-25 r/min, the inclination angle of the cylinder is 3-8 degrees, and the ore feeding concentration is 20-40 percent.
Further, the method comprises the following steps: the particle size of the vanadium titano-magnetite raw ore is less than or equal to 1.0m, the TFe content is 10.0-15.0 percent, and TiO2The content is 1.5-3.0%; wet20.0-25.0% of TFe content in the thrown concentrate and TiO2The content is 4.0-4.5%.
Specifically, the method comprises the following steps: the dry throwing tailings and the wet throwing tailings are waste rocks.
The invention has the beneficial effects that: the invention adopts a mode of combining dry tailing discarding and wet tailing discarding, and finally obtains wet-discarded concentrate as a grinding and selecting raw material. Compared with the vanadium titano-magnetite raw ore, the TFe content of the wet-throwing concentrate is improved by about 10 percent, the TFe recovery rate is about 70 percent, but the tailing throwing rate is improved by about 50 percent compared with that of single dry-type tailing throwing, namely, 50 percent of ore grinding amount can be reduced in the ore grinding process, so that the ore grinding energy consumption in the ore grinding process of the vanadium titano-magnetite can be greatly reduced.
Drawings
FIG. 1 is a schematic flow diagram of a pre-selection method of vanadium titano-magnetite according to the present invention.
Detailed Description
The preselection method of the vanadium titano-magnetite is used for preselecting low-grade vanadium titano-magnetite raw ore, the final product obtained by the invention is grinding and selecting raw material for subsequent ore selection, and as shown in figure 1, the preselection method specifically comprises the following steps:
s1, carrying out primary crushing on the vanadium titano-magnetite raw ore, then carrying out intermediate crushing, screening the intermediate crushed product, returning the product on the screen to carry out intermediate crushing again, and carrying out dry type tailing discarding on the product under the screen through a magnetic roller to obtain dry throwing concentrate and dry throwing tailing. The crushing and screening of the vanadium titano-magnetite raw ore can be summarized into a two-stage one-closed-circuit crushing method of the raw ore. The particle size of the vanadium titano-magnetite raw ore is larger, but the particle size is generally less than or equal to 1.0 m. When the medium broken product is screened, the medium broken product can be screened by a single-layer screen or a multi-layer screen. For example, screening the medium-sized products through five layers of screens, wherein the apertures of the five layers of screens are 75-12 mm, and obtaining five undersize products with different particle sizes. And dry tailings discarding ores obtained by dry tailings discarding of undersize products are used as waste rocks.
S2, performing intermediate crushing on the dry throw concentrate, then performing fine crushing, screening the fine crushed product, returning the product on the screen to perform intermediate crushing again, performing wet type tail throwing on the product under the screen through a gravity magnetic pull magnetic separator to obtain wet throw concentrate and wet throw tailings, and taking the wet throw concentrate as a mineral separation raw material. The crushing and screening of the dry-throw concentrate can be summarized as a two-stage-one closed-circuit crushing method of the concentrate. And (3) carrying out medium crushing and fine crushing on the dry-throwing concentrate, screening to obtain an undersize product with the particle size less than 10mm, carrying out wet-type tailing throwing on the undersize product to obtain a wet-throwing concentrate, and taking the wet-throwing concentrate as a subsequent grinding and selecting raw material to enter the separation operation.
The TFe content of the vanadium titano-magnetite raw ore is 10.0-15.0%, and TiO2The content is 1.5-3.0%. The TFe content of the wet-throwing concentrate is 20.0-25.0%, the grade is improved by about 10%, the TFe recovery rate is 65-75%, and TiO is2The content is 4.0-4.5%. The present invention will be further described with reference to the following examples.
Example 1
The particle size of the vanadium titano-magnetite raw ore is less than or equal to 700mm, the TFe content is 11.23 percent, and TiO2The content of the vanadium titano-magnetite is 1.68 percent, the vanadium titano-magnetite raw ore is crushed to be less than 40mm according to a two-stage one-closed circuit crushing method of the raw ore, and then the crushed raw ore is fed into a magnetic drum for dry-type tailing discarding, so that dry-type concentrate and dry-type tailing discarding are obtained. Wherein the magnetic field intensity of the magnetic drum is 4000OE, the belt speed is 1.5m/s, and the ore feeding speed is 2.0 t/h. And then, crushing the dry-throwing concentrate to be less than 5mm according to a two-stage one-closed-circuit crushing method of the concentrate, and feeding the crushed concentrate into a gravity magnetic-pull magnetic separator for wet-type throwing to obtain wet-throwing concentrate and wet-throwing tailings. Wherein the magnetic field intensity of the heavy magnetic pull magnetic separator is 6500OE, the rotating speed of the cylinder is 15r/min, the inclination angle of the cylinder is 6 degrees, and the ore feeding concentration is 30 percent. Wet throwing concentrate is used as a grinding and selecting raw material, and dry throwing tailings and wet throwing tailings are used as waste rocks. Through detection, the TFe content of the wet-throwing concentrate is 22.21 percent, the TFe recovery rate is 70.32 percent, and TiO is2The grade is about 4.21%.
Example 2
The particle size of the vanadium titano-magnetite raw ore is less than or equal to 600mm, the TFe content is 12.73 percent, and TiO2The content is 2.12 percent, the vanadium titano-magnetite raw ore is crushed to be less than 30mm according to a two-stage one-closed circuit crushing method of the raw ore, and then the crushed raw ore is fed into a magnetic drum for dry-type tailing discarding, so that dry-type cast concentrate and dry-type cast tailing are obtained. Wherein, the magnetic field intensity of the magnetic roller is 4500OE, the belt speed is 1.2m/s, and the ore feeding speed is 2.0 t/h. Then, crushing the dry-cast concentrate to be less than 7mm according to a two-section one-closed-circuit crushing method of the concentrate, feeding the crushed concentrate into a heavy magnetic pull magnetic separator for wet-type tail casting to obtain wet concentrateThrowing concentrate and wet-throwing tailings. Wherein the magnetic field intensity of the heavy magnetic pulling magnetic separator is 6000OE, the rotating speed of the cylinder is 15r/min, the inclination angle of the cylinder is 5 degrees, and the feeding concentration is 30 percent. Wet throwing concentrate is used as a grinding and selecting raw material, and dry throwing tailings and wet throwing tailings are used as waste rocks. Through detection, the TFe content of the wet-throwing concentrate is 23.40 percent, the TFe recovery rate is 69.35 percent, and TiO is2The grade is about 4.15%.
Example 3
The particle size of the vanadium titano-magnetite raw ore is less than or equal to 800mm, the TFe content is 11.94 percent, and TiO2The content of the vanadium titano-magnetite is 1.82 percent, the vanadium titano-magnetite raw ore is crushed to be less than 40mm according to a two-stage one-closed circuit crushing method of the raw ore, and then the crushed raw ore is fed into a magnetic drum for dry-type tailing discarding, so that dry-type concentrate and dry-type tailing discarding are obtained. Wherein, the magnetic field intensity of the magnetic roller is 4500OE, the belt speed is 1.2m/s, and the ore feeding speed is 1.8 t/h. And then, crushing the dry-throwing concentrate to be less than 6mm according to a two-stage one-closed-circuit crushing method of the concentrate, and feeding the crushed concentrate into a gravity magnetic-pull magnetic separator for wet-type throwing to obtain wet-throwing concentrate and wet-throwing tailings. Wherein the magnetic field intensity of the heavy magnetic pulling magnetic separator is 6000OE, the rotating speed of the cylinder is 15r/min, the inclination angle of the cylinder is 7 degrees, and the feeding concentration is 30 percent. Wet throwing concentrate is used as a grinding and selecting raw material, and dry throwing tailings and wet throwing tailings are used as waste rocks. Through detection, the TFe content of the wet-throwing concentrate is 22.75 percent, the TFe recovery rate is 71.35 percent, and TiO is2The grade is about 4.34%.
Claims (7)
1. The preselection method of the vanadium titano-magnetite is characterized in that: the method comprises the following steps:
s1, carrying out primary crushing on the vanadium titano-magnetite raw ore, then carrying out intermediate crushing, screening the intermediate crushed product, returning the product on the screen to carry out intermediate crushing again, and carrying out dry type tailing discarding on the product under the screen through a magnetic roller to obtain dry-throwing concentrate and dry-throwing tailing;
s2, performing intermediate crushing on the dry-throwing concentrate, then performing fine crushing, screening the fine crushed product, returning the product on the screen to perform intermediate crushing again, performing wet-type tailing throwing on the product under the screen through a gravity magnetic pull magnetic separator to obtain wet-throwing concentrate and wet-throwing tailing, and taking the wet-throwing concentrate as a grinding and selecting raw material.
2. A pre-selection method of vanadium titano-magnetite as claimed in claim 1, characterised in that: in S1, the particle size of the product on the sieve is more than or equal to 75 mm.
3. A method of preselecting vanadium titano-magnetite as claimed in claim 1, characterised in that: in S1, in S1, the magnetic field intensity of the dry type tailing throwing is 3000-5500 OE, the belt speed is 1.0-2.0 m/S, and the ore feeding speed is 1.5-2.5 t/h.
4. A method of preselecting vanadium titano-magnetite as claimed in claim 1, characterised in that: in S2, the particle size of the product on the sieve is more than or equal to 10 mm.
5. A method of preselecting vanadium titano-magnetite as claimed in claim 1, characterised in that: in S2, the magnetic field intensity of wet type tailing throwing is 5500-7500 OE, the rotating speed of a cylinder of the gravity magnetic pulling magnetic separator is 10-25 r/min, the inclination angle of the cylinder is 3-8 degrees, and the ore feeding concentration is 20-40 percent.
6. A pre-selection method for vanadium titano-magnetite as claimed in any one of claims 1 to 5, characterised in that: the particle size of the vanadium titano-magnetite raw ore is less than or equal to 1.0m, the TFe content is 10.0-15.0 percent, and TiO2The content is 1.5-3.0%; 20.0-25.0% of TFe content in wet-throwing concentrate and TiO2The content is 4.0-4.5%.
7. The method of preselecting vanadium titano-magnetite as claimed in claim 6, wherein: the dry throwing tailings and the wet throwing tailings are waste rocks.
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| CN202210357102.3A CN114700157A (en) | 2022-04-01 | 2022-04-01 | Preselection method of vanadium titano-magnetite |
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| CN202210357102.3A CN114700157A (en) | 2022-04-01 | 2022-04-01 | Preselection method of vanadium titano-magnetite |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115155773A (en) * | 2022-07-28 | 2022-10-11 | 攀钢集团攀枝花钢铁研究院有限公司 | Titanium sponge crushing system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115155773A (en) * | 2022-07-28 | 2022-10-11 | 攀钢集团攀枝花钢铁研究院有限公司 | Titanium sponge crushing system |
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