阅读说明：本技术 一种用于铁矿的选矿方法和选矿控制系统 (Beneficiation method and beneficiation control system for iron ore ) 是由 周继生 于 2021-09-16 设计创作，主要内容包括：本发明属于磁选矿技术领域,公开了一种用于铁矿的选矿方法和选矿控制系统,用于铁矿的选矿方法包括采用高频振动筛对球磨后的铁矿进行筛分,得到第一选料；第一选料进入第一励磁器,使得第一选料的磁性增强,得到第二选料；第二选料进入第一磁选机后,得到第三选料和第四选料,第三选料作为矿渣排入尾矿砂皮带,第四选料进入过滤机过滤后得到铁精粉。本发明通过在第一磁选机前设置第一励磁器,便于提高弱磁性铁矿的磁性,从而提高铁矿整体铁成分的回收效率。(The invention belongs to the technical field of magnetic separation and discloses a separation method and a separation control system for iron ore, wherein the separation method for iron ore comprises the steps of screening the ball-milled iron ore by adopting a high-frequency vibrating screen to obtain a first selected material; the first material selection enters a first exciter, so that the magnetism of the first material selection is enhanced, and a second material selection is obtained; and the second material selection enters a first magnetic separator to obtain a third material selection and a fourth material selection, the third material selection is discharged into a tailing sand belt as slag, and the fourth material selection enters a filter to be filtered to obtain fine iron powder. According to the invention, the first exciter is arranged in front of the first magnetic separator, so that the magnetism of weak-magnetic iron ore is improved conveniently, and the recovery efficiency of the whole iron component of the iron ore is improved.)

1. A beneficiation process for iron ore, characterized by comprising:

s1, screening the ball-milled iron ore by using a high-frequency vibrating screen to obtain a first material selection;

s2, the first material selection enters a first exciter, so that the magnetism of the first material selection is enhanced, and a second material selection is obtained;

and S3, after the second material selection enters the first magnetic separator, obtaining a third material selection and a fourth material selection, wherein the third material selection is discharged into a tailing sand belt as slag, and the fourth material selection enters a filter to be filtered to obtain fine iron powder.

2. A mineral processing method for iron ore according to claim 1, characterized by further comprising S4, arranging a second exciter on the tailing sand belt, magnetically enhancing the third concentrate after passing through the second exciter to obtain a fifth concentrate, and conveying the fifth concentrate to the high-frequency vibrating screen or the first magnetic separator.

3. The process for the beneficiation of iron ore according to claim 2, further comprising S5, wherein a second magnetic separator is provided at an output end of the second exciter, the fifth beneficiated material passes through the second magnetic separator to obtain a sixth beneficiated material and a seventh beneficiated material, the sixth beneficiated material is directly discharged, and the seventh beneficiated material is conveyed to the filter.

4. A process for the beneficiation of iron ore according to claim 1, wherein the first beneficiate has a particle size of 150 mesh or more.

5. The method of beneficiation of iron ore according to claim 2, wherein the magnetic field intensity generated by the first exciter is 1.6T or more, and the magnetic field intensity generated by the second exciter is 1.6T or more.

6. The ore dressing method for iron ore according to claim 1, characterized in that the first magnetic separator selects a permanent magnetic field, and the intensity of the permanent magnetic field is 3000-7000 gauss.

7. The method of beneficiation of iron ore according to claim 1, wherein the first exciter comprises two or more, and the two or more first exciters simultaneously receive the first beneficiate so that magnetism of the first beneficiate is enhanced.

8. A beneficiation control system for iron ore, characterized by comprising:

the execution assembly comprises a first exciter, a second exciter, a magnetic separator and a ball mill which are all arranged on a mineral separation site to perform mineral separation of iron ores;

the monitoring assembly is arranged on the ore dressing site to monitor the execution assembly and acquire a monitoring signal;

the base station is connected with the monitoring component and receives the monitoring signal;

the industrial personal computer is connected with the base station through the switch to receive the monitoring signal, makes a decision according to the monitoring signal and sends a mineral separation control instruction to the execution component through the switch;

and the central console is connected with the base station through the switch to receive the monitoring signal, and is connected with the industrial personal computer through the switch to perform bidirectional communication.

9. The beneficiation control system for iron ore according to claim 8, wherein the monitoring assembly comprises a magnetic field strength meter, an infrared sensor, a flow velocity sensor and a concentration sensor, which are in communication connection with the base station, respectively.

10. The beneficiation control system for iron ore according to claim 8, wherein the monitoring assembly further comprises a camera, and the camera is in communication connection with the base station.

Technical Field

The invention relates to the technical field of magnetic separation, in particular to a separation method and a separation control system for iron ore.

Background

The flow of the magnetic separation production line is approximately: the feed bin supplies materials, the feeder, the jaw crusher, the jaw fine crusher, the ball mill (comprising primary ball milling and secondary ball milling), the spiral classifier (high-frequency vibrating screen), the magnetic separator (obtaining fine iron powder), and the machines in the middle can be connected by a conveyor belt and the like.

Through the process, when the iron ore after classification is screened by the magnetic separator, the iron ore is completely separated by self magnetism, the magnetic screening effect is not added for iron ores with weak magnetism, and the leakage separation of a large degree is realized, so that the efficiency of recovering magnetic iron components from the iron ore is lower.

Disclosure of Invention

The invention aims to provide a beneficiation method and a beneficiation control system for iron ore, and aims to solve the problems that most weak-magnetic iron components in the iron ore cannot be extracted through a traditional magnetic separation process, and the recovery efficiency of the whole iron components of the iron ore is low.

In order to achieve the purpose, the invention adopts the following technical scheme:

the invention firstly provides a beneficiation method for iron ore, which comprises the following steps:

s1, screening the ball-milled iron ore by using a high-frequency vibrating screen to obtain a first material selection;

s2, the first material selection enters a first exciter, so that the magnetism of the first material selection is enhanced, and a second material selection is obtained;

and S3, after the second material selection enters the first magnetic separator, obtaining a third material selection and a fourth material selection, wherein the third material selection is discharged into a tailing sand belt as slag, and the fourth material selection enters a filter to be filtered to obtain fine iron powder.

Optionally, the method further comprises S4, arranging a second exciter on the tailing belt, performing magnetic enhancement on the third concentrate after passing through the second exciter to obtain a fifth concentrate, and conveying the fifth concentrate to the high-frequency vibrating screen or the first magnetic separator.

Optionally, the method further comprises S5, where a second magnetic separator is disposed at an output end of the second exciter, the fifth material is subjected to the second magnetic separator to obtain a sixth material and a seventh material, the sixth material is directly discharged, and the seventh material is conveyed to the filter.

Optionally, the particle size of the first material is 150 meshes or more.

Alternatively, the magnetic field strength generated by the first exciter may be 1.6T or more, and the magnetic field strength generated by the second exciter may be 1.6T or more.

Optionally, the first magnetic separator selects a permanent magnetic field, and the permanent magnetic field strength is 3000-7000 gausses.

Optionally, the first exciter comprises two or more first exciters, and the two or more first exciters simultaneously receive the first selection so that magnetism of the first selection is enhanced.

The present invention also provides a beneficiation control system for iron ore, including:

the execution assembly comprises a first exciter, a second exciter, a magnetic separator and a ball mill which are all arranged on a mineral separation site to perform mineral separation of iron ores;

the monitoring assembly is arranged on the ore dressing site to monitor the execution assembly and acquire a monitoring signal;

the base station is connected with the monitoring component and receives the monitoring signal;

the industrial personal computer is connected with the base station through the switch to receive the monitoring signal, makes a decision according to the monitoring signal and sends a mineral separation control instruction to the execution component through the switch;

and the central console is connected with the base station through the switch to receive the monitoring signal, and is connected with the industrial personal computer through the switch to perform bidirectional communication.

Optionally, the monitoring component includes a magnetic field intensity meter, an infrared sensor, a flow rate sensor and a concentration sensor, and is respectively in communication connection with the base station.

Optionally, the monitoring component further includes a camera, and the camera is in communication connection with the base station.

The invention has the beneficial effects that:

according to the ore dressing method for the iron ore, the first exciter is arranged in front of the first magnetic separator, so that the magnetism of weak-magnetic iron ore is improved conveniently, and the recovery efficiency of the whole iron component of the iron ore is improved.

According to the ore dressing control system, the first exciter and the second exciter are arranged on the ore dressing site, so that the magnetism of weak-magnetism iron ore can be enhanced in the ore dressing process, the iron ore with enhanced magnetism can be more easily subjected to magnetic separation in the magnetic separator, and the iron component recovery efficiency of the iron ore is further improved.

Drawings

Fig. 1 is a schematic flow diagram of a beneficiation method for iron ore according to an embodiment of the present invention;

fig. 2 is a schematic flow chart of a beneficiation method for iron ore according to a second embodiment of the present invention;

fig. 3 is a schematic flow chart of a beneficiation method for iron ore according to a third embodiment of the present invention;

fig. 4 is a schematic configuration diagram of a beneficiation control system for iron ore according to the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning. The term "plurality" is to be understood as more than two.

The first embodiment is as follows: the embodiment of the invention is a beneficiation method for iron ore, which combines the flow shown in fig. 1, and specifically comprises the following steps:

s1, screening the ball-milled iron ore by using a high-frequency vibrating screen to obtain a first material selection;

s2, enabling the first material selection to enter a first exciter, so that the magnetism of the first material selection is enhanced, and obtaining a second material selection;

and S3, feeding the second material selection into the first magnetic separator to obtain a third material selection and a fourth material selection, wherein the third material selection is discharged into a tailing sand belt as slag, the fourth material selection is fed into a filter to be filtered to obtain fine iron powder, and the fine iron powder is conveyed and recovered through a fine iron powder recovery belt.

The invention provides a beneficiation method for iron ore, which is characterized in that a first exciter is added on the basis of the conventional beneficiation method, the first exciter adopts a magnetization magnetic circuit structure disclosed by application number 2014205692911 as an excitation core, the magnetic domain moment of weak magnetic iron components is changed through a strong magnetic field, so that the magnetism of the weak magnetic iron components is improved, the weak magnetic iron components are easier to recover, and the recovery rate (in percentage by mass) of the iron ore can be improved by more than 20% compared with the conventional beneficiation method of the iron ore.

The conventional beneficiation method can be described in the background technology, the coarse iron ore is subjected to first-stage ball milling and second-stage ball milling, the coarse iron ore is sieved by a high-frequency vibrating screen after ball milling, more than 150 meshes of coarse iron ore is used as a first material, and the rest coarse iron ore is subjected to ball milling and sieving again; for the first material selection, the grain size is more than 150 meshes, so that fine recovery of iron ore is facilitated, the recovery efficiency is improved, and the magnetization of the first exciter is facilitated.

Example two: on the basis of the first embodiment, the beneficiation method for iron ore further comprises the step S4 of arranging a second exciter on the tailing sand belt, enabling the third beneficiated material to be subjected to magnetic enhancement after passing through the second exciter to obtain a fifth beneficiated material, returning to the step S1, and conveying the fifth beneficiated material to a high-frequency vibrating screen.

As shown in the flow of fig. 2, after the magnetic separation by the first magnetic separator, in order to further improve the efficiency of the magnetic separation, the second exciter is arranged to further process the third selected material, and after the third selected material passes through the second exciter, the magnetism of some weak magnetic iron ores is enhanced, so that the iron ores can be returned to the high-frequency vibrating screen again, and after the iron ores are screened again, the iron ores are magnetically separated by the first magnetic separator, thereby improving the recovery efficiency of the magnetite. It should be noted that, for the third material selection after the magnetization of the second exciter is enhanced, see the flow shown by the dotted line in fig. 2, the third material selection may also be directly conveyed to the first magnetic separator to implement magnetic separation, so as to save the flow and improve the ore dressing efficiency.

Example three: on the basis of the second embodiment, the ore dressing method for iron ore further comprises S5, a second magnetic separator is arranged at the output end of the second exciter, the fifth concentrate passes through the second magnetic separator to obtain a sixth concentrate and a seventh concentrate, the sixth concentrate is directly discharged, and the seventh concentrate is conveyed to the filter to obtain fine iron powder.

As shown in the flow chart of fig. 3, after the fifth selected material passes through the second exciter, the magnetism of weakly magnetic iron ore is enhanced, the enhanced selected material is directly subjected to magnetic separation by the second magnetic separator, and magnetic iron ore is used as a seventh selected material and enters the filter to be filtered to obtain iron concentrate powder, so that the high recovery rate of the iron ore is realized.

Alternatively, the magnetic field strength generated by the first exciter is 1.6T or more, and the magnetic field strength generated by the second exciter is 1.6T or more.

The magnetic field intensity of the first exciter and the magnetic field intensity of the second exciter can be the same or different, the first exciter and the second exciter can be set according to practical experience, the same magnetic field intensity is usually selected to be 1.6T, ore pulp has good magnetization effect, and the common requirements of iron ore recovery rate and cost are met.

In some preferred embodiments, the first magnetic separator and the second magnetic separator both use permanent magnetic fields, the permanent magnetic field strength is 3000-7000 gauss, and the iron ore dressing efficiency can be improved to more than 40% compared with the conventional method by combining the magnetic field strengths of the first exciter and the second exciter.

Optionally, the field coils of the first exciter and/or the second exciter are made of superconducting tape. The superconducting strip is adopted to replace the traditional silicon steel sheet strip, so that a magnetic field with higher strength can be realized, the excitation efficiency is better, and the mineral separation efficiency is favorably improved.

Optionally, the first exciter comprises more than 2, and the more than two exciters simultaneously receive the first selection so that the magnetism of the first selection is enhanced.

It can be understood that the quantity of the second exciter of first exciter can be designed according to the ore dressing scale of reality, and when the ore dressing scale is great, just set up first exciter and second exciter respectively and carry out work simultaneously more than two, can realize the magnetism reinforcing and the magnetic separation to a large amount of iron ores, improve ore dressing efficiency.

Example four: the invention also provides a beneficiation control system for iron ores, which comprises an execution assembly, a monitoring assembly, a base station, an industrial personal computer and a central control console as shown in fig. 4, wherein the execution assembly comprises a first exciter, a second exciter, a magnetic separator and a ball mill which are all arranged on a beneficiation site to perform beneficiation of the iron ores; the monitoring assembly is arranged on a mineral separation site to monitor the execution assembly and acquire a monitoring signal; the base station is connected with the monitoring component and receives the monitoring signal; the industrial personal computer is connected with the base station through the switch to receive the monitoring signals and make decisions according to the monitoring signals, and then sends the ore dressing control instructions to the execution assembly through the switch. The central console is connected with the base station through the switch to receive the monitoring signals, and is connected with the industrial personal computer through the switch to perform bidirectional communication.

The bidirectional communication information comprises but is not limited to a mineral separation control instruction and a parameter setting instruction, the parameter refers to a threshold parameter of the monitoring assembly, such as a temperature threshold, a concentration threshold or a flow velocity threshold, and when a monitoring signal exceeds a corresponding threshold, the industrial personal computer can judge and early warn in time, and the effect of mineral separation automatic monitoring and control is improved.

It should be explained that the beneficiation control system is a system capable of performing overall control and monitoring on the process flow of beneficiation, and for the existing beneficiation control system, in this embodiment, because the first exciter and the second exciter are arranged on the beneficiation site, in the monitoring process, the monitoring assembly is additionally provided with the magnetic field intensity meter, and the exciting magnetic fields of the first exciter and the second exciter are detected, so that the stability of the real-time magnetic field intensity is ensured. In addition, the monitoring assembly on the mineral separation site further comprises an infrared sensor, a flow velocity sensor and a concentration sensor, and a camera can be further arranged according to needs. Each monitoring subassembly is connected in order to send monitoring signal for the basic station with the basic station respectively, infrared sensor detects the operating temperature of ore dressing scene, velocity of flow sensor and consistency transmitter detect ore pulp velocity of flow and concentration, the camera can carry out remote monitoring and video shooting to whole ore dressing operation flow, upload in real time, observe in real time and monitor through the center console, when any possible dangerous condition appears, can send the danger information of taking precautions against the early warning in order to warn operational environment through switch and industrial computer, it includes but not limited to broadcasting and voice prompt to take precautions against the early warning. The central console can realize two-way communication between the switch and the industrial personal computer, including but not limited to decision of ore dressing control instructions and interaction of confirmation information and interaction of parameter threshold setting, and wired or wireless network connection is realized between the switch and an execution assembly of a construction site through gateway equipment, so that off-site automatic control can be realized, the interference of a field magnetic field environment on the industrial personal computer and the central console can be avoided, meanwhile, the working environment of workers can be improved, and the construction safety is improved.

The utility model provides a mineral separation control system of this embodiment, through set up first exciter and second exciter at the ore dressing scene, can be at the ore dressing in-process, use the magnetic domain magnetic moment of low-intensity magnetic iron composition in the high-intensity magnetic field effect change iron ore, thereby improve its magnetism, cooperate other magnetic separation processes, the iron ore after the magnetism reinforcing is selected magnetic in the magnet separator more easily, and then improve the iron composition recovery efficiency of iron ore, finally realize that high efficiency iron composition draws, now to prior art, can promote 20-40% (mass percent) with the recovery efficiency of low-intensity magnetic iron composition, reduce the wasting of resources and the secondary disaster that causes from this.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.