CN206935559U - A kind of three product column magnetic separators - Google Patents

Abstract

The utility model relates to a three-product magnetic separation column, comprising a frame, an outer cylinder, a sorting device arranged in the outer cylinder, a magnetic system, a tailings overflow tank, an ore feeding device, a water supply device and a An electric control device, the sorting device is composed of an upper rough-selection area selection mechanism and a lower fine-selection area selection mechanism integrated with the upper rough-selection area selection mechanism. Its advantages are: the utility model uses different magnetic induction intensities in the roughing process and the beneficiation process to realize the precise separation of magnetite monomer particles, associated particles and gangue minerals in the magnetite ore, which can effectively It overcomes the shortcomings of the existing magnetic separation columns such as narrow application range, large water consumption, and easy tailing of fine-grained magnetic minerals, and can improve the beneficiation efficiency of magnetite and shorten the beneficiation process of magnetite. The mineral products are mainly undissolved The separated joint minerals can be returned to the original process for grinding and re-election.

Description

A three-product magnetic separation column

technical field

The utility model belongs to the technical field of magnetic separation equipment, in particular to a tertiary product used for magnetite separation

Product magnetic separation column.

Background technique

Due to the relatively high magnetic field strength of the permanent magnetic drum magnetic separator, during the separation process of strong magnetic magnetite ore

There is a strong magnetic agglomeration phenomenon, but because the magnetic dehydration tank and the magnetic agglomeration gravity concentrator adopt a constant magnetic field, the allowable rising water velocity is small, and only fine-grained gangue and some fine-grained conjoined bodies can be separated. Therefore, in these During the sorting process of the equipment, there are varying degrees of inclusions of conglomerates and gangues in the magnetic agglomerates, which cannot completely solve the problem of non-magnetic inclusions, resulting in a decrease in the grade of the concentrate. The magnetic separation column uses the intermittent weak magnetic field in the spiral coil to accelerate the sinking of the magnetic minerals, and at the same time, uses the rising water flow to wash out the joints and gangues mixed in the magnetite monomer particles, so as to improve the precision. The purpose of ore grade.

With the development of technology, improved magnetic separation equipment and magnetic separation columns have been developed. At present, among the conventional magnetic separation equipment used in mineral processing plants, magnetic separation columns are the most widely used. For example: ZL200420070348X, discloses a magnetic separation column, ZL2005200020094455, discloses an electromagnetic helical column, ZL2003201053982, discloses a new type of magnetic separation column, the magnetic separation column uses the force of the rising water flow to flush the coarse grained gangue into the tailings , using the tension of water to suspend the fine particles of mineral powder, and at the same time apply a certain strength magnetic field to the suspended mineral particles to make them gather into a magnetic chain, and gather, sink, and be washed away under the action of the step-down magnetic field. Gather again, sink again, and complete the sorting. Although the magnetic separation column has improved the beneficiation efficiency to a certain extent, there are still the following deficiencies in terms of its working performance in industrial applications: the processing capacity per unit area of the magnetic separation column is low, and the water consumption per unit processing capacity is relatively high, resulting in the following problems : 1) The scope of application is narrow, and it can only be applied to the purification process of finer-grained and higher-grade iron concentrates, and the grade of iron concentrates can only be increased by 1-5 percentage points; 2) Capability of capturing fine-grained iron minerals Not strong, it is easy to cause tailings to overflow and run black, affecting the recovery rate of concentrate; 3) The way of tailings discharge upstream causes its water consumption to be too large. Generally, it takes 2-4 water per ton of ore to process. Ton. In fact, the magnetite ore that has been ground to a certain fineness is mainly composed of magnetite monomer particles, conjoined bodies and gangue minerals. How to accurately separate them according to the difference in specific magnetic susceptibility and specific gravity is the key to future magnetic separation. Important trends in equipment development.

Contents of the invention

The utility model aims to provide a three-product magnetic separation column which can effectively strengthen the separation effect, improve the concentrate grade and reduce water consumption.

The utility model is achieved in this way.

A three-product magnetic separation column of the utility model includes a frame, an outer cylinder, a sorting device arranged in the outer cylinder, a magnetic system, a tailings overflow tank, an ore feeding device, a water supply device and a The electric control device is characterized in that:

The sorting device is composed of an upper rough selection selection mechanism and a lower fine selection mechanism integrated with the upper rough selection selection mechanism; the magnetic system is a solenoid coil;

The upper roughing area selection mechanism is composed of a roughing sorting cylinder, a plurality of sets of roughing zone solenoid coils arranged outside the roughing and sorting cylinder, a roughing zone tangential water supply pipe arranged at the bottom of the roughing and sorting cylinder and The concentrate pipe in the roughing area is composed of the concentrate pipe in the roughing area, which is connected with the bottom cone of the roughing separation cylinder, and a coarse concentrate flow control valve is arranged in the middle of the concentrate pipe in the roughing area; The end of the ore pipe is nested with a demagnetization magnetic system, and the ore feeding pipe of the ore pulp feeding device extends to the middle and lower part of the roughing separation drum;

The lower selection zone selection mechanism includes a selection cylinder, a plurality of sets of solenoid coils for the selection zone arranged on the outside of the selection cylinder, and a tangential water supply pipe for the selection zone arranged at the lower part of the selection cylinder. , set on the top of the concentrating and sorting cylinder, and located in the ore feeding device in the concentrating area under the demagnetization magnetic system, the ore outlet pipe of the concentrate tube is connected with the bottom cone of the concentrating and sorting cylinder, and is in the middle of the ore outlet pipe of the concentrate tube There is also a concentrate flow control valve;

In the said concentrating and separating cylinder, a middle ore pipe is provided along the central axis of the concentrating and separating cylinder. There is a ring-shaped overflow port on the top, and the ore discharge pipe of the middling pipe is inclined at 45° and extends to the outside of the selection and sorting drum. A middling flow control valve is set at the end of the middling pipe's discharge pipe.

Preferably, the solenoid coil in the rough selection area is composed of 4-6 groups of energized solenoids, and its magnetic induction is 0-180mT.

Preferably, the multiple sets of selective zone solenoid coils are composed of 4-6 sets of energized solenoids, and the magnetic induction intensity is 0-80mT.

Preferably, the ore feeding device in the beneficiation area is composed of an annular ore-distributing pan and more than two ore-distributing pipes evenly arranged at the lower part of the annular ore-distributing pan, and the bottom of the ore-distributing pipe extends into the concentrating and separating cylinder In the middle and lower part, the top of the ring-shaped ore-distributing tray is designed to be open, and the conical diversion ring in the middle and the side of the inverted cone form an ore-connecting groove.

Preferably, a coarse concentrate flow control valve, a concentrate flow control valve and a medium ore flow control valve are respectively provided on the outlet of the concentrate ore outlet and the outlet of the middle ore, and the electric control device is also connected with the coarse and fine ore respectively. The ore flow control valve, the concentrate flow control valve and the medium ore flow control valve are electrically connected.

Preferably, the bottom end and the side of the lower part of the slurry feeding pipe are provided with feeding ports.

The utility model has the advantages of:

According to the difference in specific magnetization coefficient and specific gravity of magnetite monomer particles, connected organisms and gangue minerals in magnetite beneficiation, the utility model designs a rough selection area and a selection area in a magnetic separation column. And according to the characteristics of joint organisms and gangue minerals, the sorting structure and product flow direction of different components are designed in a differentiated manner. Gangue minerals with small specific gravity and weak magnetism "go up the current" and have larger specific gravity and stronger magnetism. The connected body of the magnetite "goes countercurrently", and the magnetite monomer particles with the largest specific gravity, the strongest magnetism, and the highest grade "agglomerate and flow down", which can combine the magnetite monomer particles, the connected body and the magnetite in the magnetite ore Gangue minerals are precisely separated. Compared with the traditional magnetic separation column which can only be used in the magnetite beneficiation process, the utility model can not only select concentrate and tailings, but also can select middle ore.

In the roughing process and the beneficiation process, the utility model respectively uses solenoid coils with different magnetic induction intensities to realize the precise separation of magnetite monomer particles, associated organisms and gangues in magnetite ore, which can effectively It overcomes the shortcomings of the existing magnetic separation columns such as narrow application range, large water consumption, and easy tailing of fine-grained magnetic minerals, and can improve the beneficiation efficiency of magnetite and shorten the beneficiation process of magnetite. The mineral products are mainly undissolved The separated joint minerals can be returned to the original process for grinding and re-election.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is the A-A sectional view of Fig. 1 of the present utility model.

detailed description

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figures 1 and 2, a three-product magnetic separation column includes a frame 5 and an outer cylinder 21, a sorting device arranged in the outer cylinder 21, a magnetic system, a tailings overflow tank 2, an ore feeding device, The water supply device and the electric control device connected with the magnetic system, the tailings overflow tank 2 has a horizontal overflow edge and an inclined overflow collection plane, and the collected tailings flow out from the tailings pipe, which is characterized in that:

The sorting device is composed of an upper rough selection selection mechanism and a lower fine selection mechanism integrated with the upper rough selection selection mechanism; the magnetic system is a solenoid coil electromagnetic magnetic system;

The upper roughing area selection mechanism is composed of roughing and sorting cylinder 3, a plurality of groups of roughing zone solenoid coils 4 arranged on the outside of roughing and sorting cylinder 3, and a roughing zone cut at the bottom of roughing and sorting cylinder 3. Composed of water supply pipe 5 and roughing area concentrate pipe 6, the roughing area concentrate pipe 6 is connected to the bottom cone of the roughing separation drum 3, and the middle part of the roughing area concentrate pipe 6 is provided with a coarse concentrate flow control Valve 19; a demagnetization magnetic system 7 composed of a solenoid coil is nested at the end of the concentrate pipe 6 in the roughing area, and the ore feeding pipe 1 of the pulp feeding device extends into the roughing and separating cylinder 3 lower part.

The bottom end and the side of the lower part of the ore pulp feeding pipe 1 described in the utility model are provided with an ore feeding port; the material of the rough separation and sorting cylinder 3 is non-magnetic stainless steel; The coil 4 is composed of 4-6 groups of energized solenoids, and its magnetic induction intensity is adjustable from 0-180mT. It can also be replaced by an electromagnet magnetic system with an iron core. connected to the control device.

The lower part of the selection mechanism includes a selection cylinder 9, a plurality of sets of selection zone solenoid coils 17 arranged outside the selection cylinder 9, and a plurality of sets of selection zone solenoid coils 17 is composed of 4-6 groups of energized solenoids, and its magnetic induction intensity is adjustable from 0-80mT; the tangential water supply pipe 16 in the selection area arranged at the bottom of the selection and separation cylinder 9 and the top of the selection and separation cylinder 9, And it is located in the ore feeding device in the concentration area of the demagnetization magnetic system 7 bottom, the water supply direction of the water supply pipe 16 is tangent to the separation cylinder; the concentrate pipe outlet pipe 14 is connected with the bottom cone of the separation cylinder 9, A concentrate flow control valve 15 is also provided in the middle of the concentrate pipe outlet pipe 14;

The utility model is provided with a middle ore pipe 11 along the central axis of the fine selection and separation barrel 9 in the said selection and separation cylinder 9. The lower part is provided with an annular overflow port 18 at the top of the middle ore pipe 11. The ore outlet pipe 12 of the middle ore pipe is inclined at 45° and extends to the outside of the selection and separation cylinder 9 points. A middling ore flow control valve 13 is provided at the end.

The ore feeding device in the concentrating area described in the utility model is composed of a ring-shaped ore-distributing tray 8 and more than two ore-distributing pipes 10 evenly arranged at the bottom of the ring-shaped ore-distributing tray 8. The bottom of the ore-distributing pipe 10 extends into the fine In the middle and lower part of the sorting cylinder 9, the top of the ring-shaped ore-distributing disc 8 is designed to be open, and the circular frustum-shaped guide ring 20 in the middle and the side of the inverted cone form an ore-connecting groove.

Below in conjunction with accompanying drawing illustrate the use process of the present utility model:

As shown in Figure 1 and Figure 2, start the tangential water supply pipe 5 of the upper rough selection area selection mechanism and the lower selection area

The tangential water supply pipe 16 of the sorting mechanism is used to adjust the coarse ore flow control valve 19 of the upper roughing area sorting mechanism, the concentrate flow control valve 15 and the middle ore flow control valve 13 of the lower beneficiation area sorting mechanism to ensure that the tailings overflow When the flow surface is stable, the total water supply and the flow of the three outlets are basically kept in balance. Start the electric control device of the equipment to excite the solenoid coil 4 in the rough selection area, the demagnetization magnetic field 7 and the solenoid coil 17 in the selection area. The magnetite slurry with a mass concentration of about 50% is pumped through the stirring tank to the ore feeding pipe 1 of the three-product magnetic separation column. Under the condition that the magnetic field 4 in the rough selection area changes periodically, the magnetite with strong magnetic And the connected organisms produce "agglomeration-dispersion-agglomeration" and gradually move down under the action of gravity, while the non-magnetic gangue minerals with small specific gravity are carried by the rising water to the tailings overflow tank 2 and become tailings that can be discarded directly ; After the concentrate in the roughing area enters the concentrate pipe 6 in the roughing area through the bottom cone, the residual magnetism is eliminated under the action of the demagnetizing magnetic field 7 to prepare for the selection in the selecting area; 19 can also adjust the concentration of ore feeding in the beneficiation area. The magnetite that has been selected in the rough beneficiation area enters the beneficiation area after passing through the ore feeding device in the beneficiation area composed of the ring-shaped distribution pan 8 and the feeding pipe 10. When the magnetic induction is weak, the magnetic field of the solenoid coil 17 in the beneficiation area changes periodically, and the magnetite monomer particles with the strongest magnetism and the largest specific gravity undergo "agglomeration-dispersion-agglomeration" and gradually decrease. Moved into the concentrate tube 14 to become the final high-grade concentrate, while the intergrowth particles with slightly weaker magnetism and smaller specific gravity are carried to the top of the selection cylinder 9 in the selection area by the rising water flow in the selection area, and pass through the middle ore overflow port. 18 enters the middle ore pipe 11 and becomes the lower middle ore of grade. By separately adjusting the feed water flow in the rough selection area and the selection area, respectively adjusting the magnitude of the excitation current and the electrification period in the rough selection area and the selection area, the process of magnetite separation can be controlled.

The indicators of concentrate, medium ore and tailings in the mine are adjusted.

Claims (6)

1. a kind of three product column magnetic separators, including frame and outer barrel, the sorting unit being located in outer barrel, magnetic system, mine tailing overflow launder, to Ore deposit device, waterworks and the electric control gear being connected with magnetic system, it is characterised in that：

Described sorting unit is by top roughing area sorting mechanism and the bottom being connected as a single entity with top roughing area sorting mechanism essence Constituency sorting mechanism is formed；Described magnetic system is solenoid coil；

Described top roughing area sorting mechanism is by roughing separation tube, the multigroup roughing area helical being arranged on the outside of roughing separation tube Pipeline circle, the tangential feed pipe in roughing area and roughing area concentrate pipe for being arranged on roughing separation tube bottom are formed, described roughing Area's concentrate pipe is connected with the base cone of roughing separation tube, and rough concentrate flow control valve is provided with the middle part of roughing area concentrate pipe；Institute The end for the roughing area concentrate pipe stated is nested with de- magnetic magnetic system, and the mineral-feeding pipe of mine-feeding equipment extends middle and lower part in roughing separation tube；

The selected area's sorting mechanism in described bottom includes selected separation tube, the multigroup selected area's spiral shell being arranged on the outside of selected separation tube Spool coil, the tangential feed pipe in selected area of selected separation tube bottom is arranged on, be arranged at the top of selected separation tube, and positioned at de- Selected area's mine-feeding equipment of magnetic magnetic system bottom, concentrate ore outlet pipe is connected with the base cone of selected separation tube, in the middle part of concentrate ore outlet pipe It is additionally provided with concentrate flow control valve；

In described selected separation tube, middle pipe is provided with along selected separation tube is central axial, is put at the top of described middle pipe In the bottom of selected area's mine-feeding equipment, and ring-like overfall is provided with chats tube top portion, prolonged after 45 ° of the ore outlet pipe inclination of middle pipe The outside of selected separation tube is extended, the end of the ore outlet pipe of middle pipe is provided with chats flow control valve.

2. three products column magnetic separator according to claim 1, it is characterised in that described multigroup roughing area solenoid coil is 4-6 groups energization solenoid forms, and its magnetic induction intensity is 0-180mT.

3. three products column magnetic separator according to claim 1, it is characterised in that described is arranged on the outside of selected separation tube Multigroup selected area's solenoid coil is made up of 4-6 group energization solenoids, and its magnetic induction intensity is 0-80mT.

4. three products column magnetic separator according to claim 1, it is characterised in that described selected area's mine-feeding equipment is by ring-like point The flat of ore is formed with more than two points of pipes for being uniformly arranged on ring-like mine-separating disk bottom, divides pipe bottom to stretch into selected sorting Middle and lower part in cylinder, the top of described ring-like mine-separating disk are open design, the side of the round table-like guide ring and inverted cone-shaped at middle part Form mine-carrying groove.

5. three products column magnetic separator according to claim 1, it is characterised in that described rough concentrate flow control valve, concentrate stream Control valve and chats flow control valve respectively electrically connect with electric control gear.

6. three products column magnetic separator according to claim 1, it is characterised in that the bottom and side of described mineral-feeding pipe bottom It is equipped with feed port.