CN111744663A - Ore dressing process for vanadium titano-magnetite - Google Patents
Ore dressing process for vanadium titano-magnetite Download PDFInfo
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- CN111744663A CN111744663A CN202010662403.8A CN202010662403A CN111744663A CN 111744663 A CN111744663 A CN 111744663A CN 202010662403 A CN202010662403 A CN 202010662403A CN 111744663 A CN111744663 A CN 111744663A
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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
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Abstract
The invention relates to a vanadium titano-magnetite beneficiation process, and belongs to the technical field of beneficiation. The beneficiation process of the vanadium titano-magnetite comprises the following steps: A. crushing: crushing the vanadium-titanium magnetite ore to be less than 250mm by adopting a Nordberg crusher, then screening the crushed vanadium-titanium magnetite ore by using a WAY vibrating screen, and feeding undersize with the particle size of 0-75 mm into a cylindrical screen for low-intensity magnetic separation; B. grinding and selecting: and C, crushing oversize materials crushed in the step A to be below 80mm, screening waste stones with the size of minus 5mm by dry-type tailing discarding, screening, and carrying out stage grinding and stage magnetic separation on undersize materials with the size of below 12mm, wherein the grinding granularity of minus 0.076mm accounts for 55% in the first stage, the grinding granularity of minus 0.076mm accounts for 70% in the second stage, and the magnetic separation is carried out by adopting a GMT demagnetizer. The vanadium titano-magnetite beneficiation process greatly improves beneficiation efficiency, and maximizes vanadium titano-magnetite resource value.
Description
Technical Field
The invention relates to a vanadium titano-magnetite beneficiation process, and belongs to the technical field of beneficiation.
Background
Vanadium titano-magnetite is distributed around the world and its chemical composition and proportions vary due to the different conditions of the deposit. In addition, the optional performance of vanadium-titanium magnetite in different areas is different, so that the iron, vanadium and titanium contents of the production combination are different. The vanadium-titanium magnetite deposit in China is abundant in reserves and wide in distribution, has been proved to be high up to 150 hundred million tons in reserves and is mainly distributed in northwest Chengde areas, Sichuan Wenchang areas and the like. The Panzhihua is the main mineral forming zone of the vanadium titano-magnetite in China, is located in Sichuan Wenchang area, and the vanadium titano-magnetite produced in the area has special properties. Vanadium titano-magnetite is also produced in southeast Asia, Africa and the like, but the vanadium titano-magnetite is difficult to be completely separated by the process technology, and the refining precision is not high. Therefore, the global value of the vanadium titano-magnetite of the Panzhihua is promoted to be higher.
Due to the fact that the mining life is too long, the resources of the medium-high grade iron ore are greatly reduced, the problem of iron ore shortage is increasingly prominent, and effective ways for optimizing the ore dressing technology are urgently needed to be supplemented. Production practices show that the excellent performance of 77.22% concentrate grade and 10.12% tailing grade is obtained after the beneficiation process flow is optimized. However, the optimized process flow still has certain defects and problems.
Disclosure of Invention
The invention aims to solve the first technical problem of providing a vanadium titano-magnetite beneficiation process with high beneficiation efficiency.
In order to solve the first technical problem of the invention, the vanadium titano-magnetite beneficiation process of the invention comprises the following steps:
A. crushing: crushing the vanadium-titanium magnetite ore to be less than 250mm by adopting a Nordberg crusher, then screening the crushed vanadium-titanium magnetite ore by using a WAY vibrating screen, and feeding undersize with the particle size of 0-75 mm into a cylindrical screen for low-intensity magnetic separation;
B. grinding and selecting: and C, crushing oversize materials crushed in the step A to be below 80mm, screening waste stones with the size of minus 5mm by dry-type tailing discarding, screening, and carrying out stage grinding and stage magnetic separation on undersize materials with the size of below 12mm, wherein the grinding granularity of minus 0.076mm accounts for 55% in the first stage, the grinding granularity of minus 0.076mm accounts for 70% in the second stage, and the magnetic separation is carried out by adopting a GMT demagnetizer.
In a specific embodiment, the product obtained through screening and magnetic separation in the step B is graded and then repeatedly reselected and ground to have the granularity of 0.2-0.1 mm.
In one embodiment, the grading is performed using an MVS high frequency vibrating screen.
In one embodiment, the oversize from the sieving in step B is passed through fine crushing to a particle size below 34mm and returned to sieving.
Has the advantages that:
the vanadium titano-magnetite beneficiation process solves some problems existing in vanadium titano-magnetite beneficiation in the prior art, greatly improves beneficiation efficiency, and maximizes vanadium titano-magnetite resource value.
Drawings
FIG. 1 is a schematic view of a crushing process according to the present invention;
FIG. 2 is a schematic view of an ore grinding process according to the present invention.
Detailed Description
In order to solve the first technical problem of the invention, the vanadium titano-magnetite beneficiation process of the invention comprises the following steps:
in order to solve the first technical problem of the invention, the vanadium titano-magnetite beneficiation process of the invention comprises the following steps:
A. crushing: crushing the vanadium-titanium magnetite ore to be less than 250mm by adopting a Nordberg crusher, then screening the crushed vanadium-titanium magnetite ore by using a WAY vibrating screen, and feeding undersize with the particle size of 0-75 mm into a cylindrical screen for low-intensity magnetic separation;
B. grinding and selecting: and C, crushing oversize materials crushed in the step A to be below 80mm, screening waste stones with the size of minus 5mm by dry-type tailing discarding, screening, and carrying out stage grinding and stage magnetic separation on undersize materials with the size of below 12mm, wherein the grinding granularity of minus 0.076mm accounts for 55% in the first stage, the grinding granularity of minus 0.076mm accounts for 70% in the second stage, and the magnetic separation is carried out by adopting a GMT demagnetizer.
In a specific embodiment, the product obtained through screening and magnetic separation in the step B is graded and then repeatedly reselected and ground to have the granularity of 0.2-0.1 mm.
In one embodiment, the grading is performed using an MVS high frequency vibrating screen.
In one embodiment, the oversize from the sieving in step B is passed through fine crushing to a particle size below 34mm and returned to sieving.
The following examples are provided to further illustrate the embodiments of the present invention and are not intended to limit the scope of the present invention.
Example 1
As shown in figure 1, the optimized flow of the crushing process is a three-stage-one closed-loop flow, and the granularity of the final product is-12 mm. Pre-screening the coarse crushed product by a double-layer sieve, washing and screening the product with the diameter of-25 mm by a cylindrical ore washing sieve to obtain a product with the diameter of-5 mm, discarding the tail by wet type low intensity magnetic separation, wherein the waste discarding rate is 3.95 percent, and TiO is2The grade was 5.00%. The product with the particle size of minus 80mm and the particle size of TiO is subjected to dry type tailing discarding by adopting a magnetic pulley for checking and screening products with the particle size of plus 25mm2The grade was 5.00%. After 2 times of waste disposal, the TFe grade of the ore can reach 22.89 percent, and the TiO content is reduced2The grade reaches 10.62 percent, the amount of the ore entering the mill is reduced by 14 percent, and the waste throwing effect is obvious.
As shown in figure 2, the optimization process of the ore grinding process comprises the steps of stage grinding and stage magnetic separation, wherein the ore grinding granularity of the first stage is 55 percent at minus 0.076mm, the tailings of the ore grinding stage are thrown at minus 5mm, the ore grinding granularity of the second stage is 70 percent at minus 0.076mm, and the magnetic separation is carried out by adopting a GMT demagnetizer. When the grinding fineness is-0.2 mm, the TFe grade of the concentrate is about 55 percent and is close to the highest value.
In order to ensure that the beneficiation efficiency is exerted to the maximum extent, the ground mineral level of people is improved; to ensure the particle size of the crushed product, a nodebs crusher may be used, and the WAY shaker may be used instead of the conventional shaker. In order to ensure that qualified products enter the next procedure through screening, the crushing efficiency is improved, the interference of corresponding crushing operation is avoided, and the particle size of the crushed products is reduced to the maximum extent.
The permanent magnetic cylinder dry separation magnetic separator is selected during magnetic separation, so that the production cost can be reduced, the process flow is optimized, the comprehensive economic benefit is improved, the basic economic benefit condition for developing the ultra-low grade magnetic iron ore is met, the dry magnetic separator is used on the premise of not improving the total tailings, and the interference on the separation system is reduced to the maximum extent.
The grinding and selecting process optimization scheme comprises the following steps: during the grinding and selecting operation, in order to reduce the influence of magnetic groups on the grading efficiency, a GMT demagnetizer can be properly added. In order to simplify the process, the grading operation is changed into an MVS high-frequency vibrating screen. In order to solve the problems of poor ore grinding effect, increased concentration of secondary operation and the like, the magnetic separation product mill can be ground once again. In addition, after the improvement, part of the ore can eliminate interference in the useful ore to the maximum extent, and meanwhile, the interference has a remarkable effect of improving the qualified product content of the human sieve.
The process flow is simple to operate, high in recycling rate, strong in ore adaptability, high in equipment beneficiation efficiency and the like, has certain outstanding characteristics of scientific and reasonable process procedures in novel equipment with high technological content, and has certain persuasion to the advancement of the process and the technology. In order to ensure that the high efficiency in the beneficiation system can be fully exerted in the whole process, the advantages of the equipment and the process are converted in a centralized manner, and then relevant interference factors are eliminated. The method provides certain basis for remarkably improving the mass efficiency of the MVS high-frequency vibrating screen and the common vibrating screen by combining related production practices, and is one of the best devices in the process flow operation process.
Claims (4)
1. The vanadium titano-magnetite beneficiation process is characterized by comprising the following steps:
A. crushing: crushing the vanadium-titanium magnetite ore to be less than 250mm by adopting a Nordberg crusher, then screening the crushed vanadium-titanium magnetite ore by using a WAY vibrating screen, and feeding undersize with the particle size of 0-75 mm into a cylindrical screen for low-intensity magnetic separation;
B. grinding and selecting: and C, crushing oversize materials crushed in the step A to be below 80mm, screening waste stones with the size of minus 5mm by dry-type tailing discarding, screening, and carrying out stage grinding and stage magnetic separation on undersize materials with the size of below 12mm, wherein the grinding granularity of minus 0.076mm accounts for 55% in the first stage, the grinding granularity of minus 0.076mm accounts for 70% in the second stage, and the magnetic separation is carried out by adopting a GMT demagnetizer.
2. The vanadium titano-magnetite beneficiation process according to claim 1, wherein the product subjected to screening and magnetic separation in the step B is classified and then gravity-separated and ground for multiple times until the particle size is 0.2mm to 0.1 mm.
3. The vanadium titano-magnetite beneficiation process according to claim 2, wherein the grading employs an MVS high frequency vibrating mesh screen.
4. The vanadium titano-magnetite beneficiation process according to claim 1 or 2, wherein the sieved oversize material of step B is returned to sieving after fine crushing to a particle size below 34 mm.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112427124A (en) * | 2020-10-30 | 2021-03-02 | 北京建工资源循环利用投资有限公司 | Construction waste recycling method and equipment |
| CN114247555A (en) * | 2021-12-22 | 2022-03-29 | 武钢资源集团金山店矿业有限公司 | Crushing and grinding magnetic separation treatment process for iron ore |
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| CN114247555A (en) * | 2021-12-22 | 2022-03-29 | 武钢资源集团金山店矿业有限公司 | Crushing and grinding magnetic separation treatment process for iron ore |
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