CN204892121U - Vibrating magnetic field screening machine - Google Patents

Abstract

The utility model discloses a vibrating magnetic field sieve separator comprises parts such as casing, permanent magnetism magnetic system, reel, sieve, isolation spring, exciting motor, branch feed cylinder, distributing device, concentrate storehouse, middling storehouse, concentrate ore discharge valve, middling ore discharge valve and spiral discharge device. The permanent magnetic systems are positioned on two sides of the shell; the screen frame is connected to the inner side of the shell through a vibration isolation spring; the sieve plate is obliquely fixed in the sieve frame; the excitation motor is fixed on the upper part of the screen frame; the distributing cylinder is arranged at the upper part of the shell, and the bottom of the distributing cylinder is connected with the distributing device; the spiral discharging device is fixed at the bottom of the concentrate bin. The method is suitable for the concentration of minerals such as magnetite, vanadium-titanium magnetite, roasted magnetite and the like, can effectively improve the concentrate grade, and has the advantages of low energy consumption, simple structure, strong adaptability, difficult blockage of sieve pores, convenient operation and maintenance and the like.

Description

A vibrating magnetic field screening machine

technical field

The utility model relates to a magnetic separator technology, in particular to designing a vibrating magnetic field screening machine. This equipment can be used for the selection of minerals such as magnetite, vanadium-titanium magnetite and roasted magnetite.

Background technique

At present, the trend of poverty, fineness and hybridization of my country's iron ore resources is becoming more and more serious. How to improve the grade of iron ore concentrate, reduce energy consumption and save costs has become the key direction of my country's iron ore beneficiation research. Magnetic agglomeration gravity separation is an important method for magnetite beneficiation. The equipment developed by this method mainly includes magnetic agglomeration gravity separation machine, magnetic separation column and magnetic field screening machine.

The magnetic agglomeration re-separator was successfully researched by the Comprehensive Utilization Research Institute of the Ministry of Geology and Mineral Resources and Shougang Mining Company in 1984. The machine adopts a permanent magnetic system, which is cylindrical and has 3 to 4 layers, which are divided into inner magnetic system, middle magnetic system and outer magnetic system. The magnetic blocks of each layer are arranged intermittently. The two sorting areas between the magnetic system, the middle magnetic system and the outer magnetic system form a low, weak, uneven and discontinuous constant magnetic field of 0~15mT. The sorting water flow is fed into the sorting area from the water supply ring at a certain pressure, and the sorting process begins. Under the combined action of changing magnetic field force, rising water flow force and its own effective gravity, magnetite particles form mild magnetic agglomeration when entering the separation area; when magnetic agglomeration enters the non-magnetic field area, the upward water flow exerts shear on the pulp The flushing effect is dispersed; and then enters the magnetic field area downwards, and forms a slight magnetic agglomeration due to the magnetic field force. In this way, the magnetic agglomeration is in the state of repeated dispersion-agglomeration-dispersion during the sedimentation process, and is continuously purified under the washing and elutriation of the sorting water flow. ore; the purified magnetic agglomerates continue to move downward to become concentrate. The disadvantage of this equipment is that it cannot remove the coarse-grained joints and gangues, and it is easy to run black and so on.

The magnetic separation column is a new type of electromagnetic high-efficiency magnetic gravity separation equipment successfully developed by the Mineral Processing Department of Anshan Iron and Steel Institute in the early 1990s. The magnetic separation column adopts a special power supply mechanism to make the excitation coil generate a special magnetic field transformation mechanism in the separation space, and performs repeated magnetic polymerization-dispersion-magnetic polymerization on the pulp, which can fully separate the inclusions in conventional magnetic separation equipment products. Medium and poor conjoined organisms and single gangue. The magnetic induction of the magnetic separation column is between 0 and 20mT, and it can be adjusted at any time according to the change of ore properties. adjust. Its separation process: the ore feeding slurry enters the upper part of the magnetic separation column from the ore feeding hopper through the ore feeding pipe, and the magnetic particles, especially the single magnetic particles, are repeatedly agglomerated and dispersed under the action of the magnetic field force from top to bottom, and then Coupled with the flushing and elutriation effect of the tangential rising water flow from bottom to top, the single gangue and the medium and poor conjoined organisms mixed in it will rise up driven by the rising water flow, and overflow from the upper overflow tank to become tailings. Magnetite particles, including single magnetite particles and magnetite-rich conjoined bodies, are not washed by the rising water flow, but are discharged by the lower concentrate under the action of the continuous downward magnetic field force and the effective gravity of the magnetic chain. The ore pipe is discharged into high-grade magnetite concentrate. The disadvantages of this equipment are large water consumption, high energy consumption and high equipment height.

The magnetic field screening machine is a new patented equipment for magnetite beneficiation developed on the basis of the magnetic field screening method invented by Zhengzhou Institute of Comprehensive Utilization of Mineral Resources, Chinese Academy of Geological Sciences in 1994. develop. The magnetic sieve is mainly aimed at the defect that the traditional magnetic separator is easy to contain gangue and it is more difficult to separate the conjoined body. The magnetite is used to magnetize the magnetite into a chain-like magnetic cluster in a relatively uniform weak magnetic field, which increases the magnetic field. Iron ore and gangue joints have poor sedimentation speed and size. The screen installed in the magnetic field is used to effectively separate gangue and joints. Chain magnetic aggregates are discharged from the screen to become concentrates, and gangues and joints pass through The sieve holes become middle ore. This equipment has obvious effects on magnetite selection and quality improvement, and has the advantages of wide application range of particle size, small water consumption, high sorting accuracy and low energy consumption, but its disadvantage is that the screen holes are easy to block and the later maintenance of the screen is inconvenient.

To sum up, this kind of low-weak magnetic field selection equipment represented by the magnetic field screening machine basically solves the problem of quality improvement and impurity reduction that has plagued my country's iron ore for many years, and also has the effect of saving energy and reducing consumption to a certain extent, but there are also respective shortcomings.

Utility model content

Aiming at the disadvantage that the sieve hole of the magnetic field screening machine is easily blocked in the prior art, the utility model provides a vibrating magnetic field screening machine with large processing capacity, continuous operation and self-cleaning sieve plate.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a vibrating magnetic field screening machine, including a housing, a permanent magnetic system, a screen frame, a screen plate, a vibration isolation spring, an exciting motor, a material distribution cylinder, and a distributor , concentrate bin, middle ore bin, concentrate discharge valve, middle ore discharge valve and spiral discharge device and other components. It is characterized in that: the permanent magnetic system is located on both sides of the shell; the screen frame is connected to the inside of the shell through a vibration isolation spring; the sieve plate is obliquely fixed in the screen frame; the excitation motor is fixed on the upper part of the screen frame; On the upper part of the shell, the bottom of the distribution cylinder is connected with the distributor; the screw discharge device is fixed at the bottom of the concentrate bin.

The vibration excitation motors work intermittently or continuously, and the two excitation motors rotate in reverse synchronously. The hard-to-screen particles or slime that are blocked on the screen holes are subjected to the excitation force, and they leave the screen surface and enter the intermediate ore bin.

The sieve plates are evenly arranged along the sieve frame.

The sieve surface of the sieve plate is parallel to the magnetic force lines formed by the permanent magnet system.

The vibration-exciting motors are respectively arranged at both ends of the screen frame and rotate in opposite directions synchronously.

Compared with existing technology:

1) The distribution cylinder and distributor are used to ensure that the ore slurry is evenly fed to the sieve plate.

2) The vibration excitation motor rotates synchronously and reversely to drive the vibration of the sieve plate, effectively preventing the screen from clogging;

3) The spiral discharge device effectively prevents the blockage of the concentrate bin.

Description of drawings

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

Fig. 2 is a sectional view of the utility model.

Detailed ways

As shown in Figure 1, a vibrating magnetic field screening machine consists of a housing 1, a permanent magnet system 2, a screen frame 3, a screen plate 4, a vibration isolation spring 5, an exciting motor 6, a material distribution cylinder 7, and a distributor 8 , concentrate bin 9, middle ore bin 10, concentrate ore discharge valve 11, middle ore discharge valve 12 and spiral discharge device 13 and other components. It is characterized in that: the permanent magnetic system 2 is located on both sides of the housing 1; the screen frame 3 is connected to the inner side of the housing 1 through a vibration isolation spring 5; the screen plate 4 is obliquely fixed in the screen frame 3; the excitation motor 6 is fixed on the The upper part of the screen frame 3; the material distribution cylinder 7 is arranged on the upper part of the shell 1, and the bottom of the material distribution cylinder 7 is connected with the distributor 8; the spiral discharge 13 device is fixed at the bottom of the concentrate bin 9. The sieve plates 4 are evenly arranged along the sieve frame 3 . The screen surface of the sieve plate 4 is parallel to the magnetic lines of force formed by the permanent magnet system 2 . Vibration motors 6 are respectively arranged at both ends of the screen frame 3 and rotate in opposite directions synchronously.

The vibrating magnetic field screening machine is a continuous operation, and the operation steps are as follows: When working, the ore slurry is evenly fed to the sieve plate through the separator tube and the distributor. In the magnetic field that is as uniform as possible, the magnetized particles form a chain-like magnetic agglomeration along the direction of the magnetic force line. , roll and slide from the sieve to the concentrate bin, the spiral discharge device runs continuously in the concentrate bin, and the concentrate is discharged through the concentrate discharge valve, while the particles with weaker magnetism pass through the screen hole smoothly, from the two under the screen Side discharge, after entering the middling ore bin, it is discharged through the middling ore discharge valve. The vibration excitation motor works intermittently or continuously, and the hard-to-screen particles blocked on the screen hole are subjected to the excitation force, and they leave the screen surface and enter the intermediate ore bin.

Claims (4)

1. an oscillating magnetic field screening machine, comprise the parts composition such as housing (1), permanent magnetic system (2), screen frame (3), sieve plate (4), isolation spring (5), shock electric machine (6), point barrel (7), distributing device (8), concentrate store (9), middle ore storage bin (10), concentrate ore discharge valve (11), chats ore discharge valve (12) and discharge with endless screw device (13), it is characterized in that: described permanent magnetic system (2) is positioned at housing (1) both sides; Screen frame (3) is connected to housing (1) inner side by isolation spring (5); Sieve plate (4) tilts to be fixed in screen frame (3); Shock electric machine (6) is fixed on screen frame (3) top; Divide barrel (7) to be arranged at housing (1) top, point barrel (7) bottom is connected with distributing device (8); Discharge with endless screw device (13) is fixed on concentrate store (9) bottom.

2. a kind of oscillating magnetic field screening machine according to claim 1, is characterized in that: described sieve plate (4) is evenly distributed along screen frame (3).

3. a kind of oscillating magnetic field screening machine according to claim 1, is characterized in that: the compass screen surface of described sieve plate (4) is parallel to the magnetic line of force that permanent magnetic system (2) is formed.

4. a kind of oscillating magnetic field screening machine according to claim 1, is characterized in that: described shock electric machine (6) is arranged in screen frame (3) two ends respectively, and synchronous backward rotates.