CN2323874Y

CN2323874Y - Magnetic separator

Info

Publication number: CN2323874Y
Application number: CN 98202813
Authority: CN
Inventors: 张田; 张光伟
Original assignee: Pangang Group Mining Co Ltd
Current assignee: Pangang Group Mining Co Ltd
Priority date: 1998-03-31
Filing date: 1998-03-31
Publication date: 1999-06-16
Anticipated expiration: 2008-03-31

Abstract

The utility model relates to a novel magnetic separator which is mainly composed of a roller, a magnetic system, a half counterflow bottom box and a driving device. The utility model is characterized in that the inner surface of the roller is coated with strip-shaped soft magnetic material along the axial direction; gaps between the half counterflow bottom box and the roller are not equal, and therefore, under the precondition that the magnetic system of the magnetic separator is not changed, the distribution method of the magnetic field of the magnetic separator and the adsorbing state of magnetic particles are changed. The utility model has the advantage that the magnetic separation concentrate grade can be increased under the precondition that qualified tailings are abandoned once. The utility model is particularly suitable for the magnetic separation working of iron ores.

Description

A kind of novel magnetic separator

The utility model relates to a kind of preparation equipment, and this equipment is specially adapted to the magnetic concentration working that all kinds of iron ore beneficiating factories carry out iron ore.

The tradition half adverse current type permanent-magnet drum type magnetic separator that present iron ore beneficiating factory generally adopts is mainly by cylinder, magnetic system, half adverse current type under casing and transmission device are formed, the polarity of its magnetic system is arranged alternately, make the magnetic ore particle in the process of sorting, produce magnetic and stir phenomenon, help getting rid of the gangue mineral that is mixed in wherein, improve the magnetic concentrate quality, but it is big to have remanent magnetism in sorting, the coercivity height, still existing comparatively serious disk pack during the iron ore of the big character of specific susceptibility wraps up in and the mechanical entrainment phenomenon, particularly the monomer gangue is selected advances in the concentrate for a large amount of gangues, has had a strong impact on the quality of magnetic concentrate.

The utility model provide a kind of have under the disposable prerequisite of abandoning qualified tailings can effectively get rid of the monomer gangue mineral that is mingled with in the concentrate, improve the magnetic separator of magnetic concentrate quality.

The utility model improves on the basis of tradition half adverse current type drum magnetic separator and makes, and it mainly is made up of cylinder, magnetic system, half adverse current type under casing and transmission device, but compares with traditional magnetic separator, it is characterized in that:

(1), post ribbon soft magnetic material (as pure iron, silicon steel sheet etc.) vertically, its width is 5～10mm, and the stickup gap width is 10～15mm at the inner surface of magnetic separator cylinder;

(2), the gap of half adverse current type under casing of magnetic separator and cylinder is for equidistant gap, promptly scans the under casing gap little 10～20mm of the under casing gap in district than selected district.

The utility model is compared with traditional magnetic separator has following advantage:

(1), because the inner surface at cylinder posts the ribbon soft magnetic material vertically, under the situation that reduces magnetic separator cylinder surface field intensity hardly, changed the regularity of its distribution, make the magnetic ore particle be the short magnetic linkage adsorbed state of ribbon at cylinder surface, the long magnetic linkage adsorbed state of magnetic ore particle of this and traditional magnetic separator is visibly different, this makes the contact area of adsorbed ore particle and magnetic separator under casing water be multiplied, under casing water is further strengthened the machinery effect of breaking up of magnetic linkage, magnetic rolling is also become by magnetic ore particle band by in blocks rolling continuously and rolls in an orderly manner, more helps getting rid of the monomer gangue that is mixed in wherein in the process of rolling;

(2), owing to adopted the not design in equidistant under casing gap, make average field-strength that under the prerequisite that does not change magnetic architecture magnetic separator scans the space, district obviously greater than the average field-strength in its space, selected district, so not only help improving the grade of magnetic concentrate, and can guarantee higher operation recovery;

(3), the comparative test result with traditional magnetic separator shows that when the utility model is used for the sorting vanadium titano-magnetite, can improve 0.71 percentage point of magnetic concentrate grade, the while can directly be abandoned qualified tailings.

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

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

Novel magnetic separator mainly is made up of cylinder, magnetic system, half adverse current type under casing and transmission device, motor drives cylinder 1. by the direction as shown rotation by transmission device, and 9. magnetic system is relatively-stationary, its drift angle can be regulated, 2. inner surface at cylinder posts the ribbon soft magnetic material vertically, as pure iron, silicon steel sheet etc., its width is 5～10mm, and the stickup gap width is 10～15mm.Half adverse current type under casing is welded by non-magnetic corrosion resistant plate, mainly by give the ore deposit case 3., under casing 7., 5. concentrate hopper reach the concentrate rinse water arrangement and 4. wait several parts to form, scan about the under casing gap A little 10～20mm of under casing gap B than selected district in district in 7. under casing, 7. also has an accident gape 8. in the lower end under casing, the discharge of ore pulp when being used for accident or cleaning magnetic separator.

The flow process of ore pulp is during novel magnetic separator magnetic separation: after ore pulp feeds magnetic separator, through 3. entering magnetic separator for the ore deposit case by the bottom, the magnetic ore particle is inhaled on cylinder surface 1. under the magnetic field force effect 9. of magnetic system, 1. move up with cylinder, forwarding magnetic to is 9. to locate a little less than the fringe magnetic field, enter concentrate hopper 5. under the effect of flushing water, 6. discharge through the concentrate pipe, 1. the very weak ore particle of non magnetic and magnetic enters debris tube under the flow of slurry effect of switched in opposite with cylinder and discharges in 10. in cell body.

Claims

1. novel magnetic separator, it mainly is made up of cylinder, magnetic system, half adverse current type under casing and transmission device, and it is characterized in that: the inner surface at cylinder posts the ribbon soft magnetic material vertically; The gap of half adverse current type under casing and cylinder is not equidistant gap;

2. according to claims 1 described novel magnetic separator, it is characterized in that: above-mentioned said ribbon soft magnetic material can be pure iron, silicon steel sheet, and its width is 5～10mm, and it pastes gap width is 10～15mm;

3. according to claims 1 or 2 described novel magnetic separators, it is characterized in that: the gap of above-mentioned said half adverse current type under casing and cylinder, in the gap of scanning the district than the little 10～20mm in the gap in selected district.