DE1118163B - Electric separator - Google Patents

Description

The invention relates to electrical separators for cleaning gases containing both magnetic and non-magnetic components Use of devices for magnetic and electrostatic separation, with large areas Precipitation electrodes and spray electrodes between gas inlet and gas outlet.

In the magnetic treatment of iron ores, especially magnetic taconites, it is necessary to to separate the magnetic part of the ore from the duct. This is usually done in the Way achieved that the ore pulverized, the pulverized mixture of magnetic material and the Gear treated magnetically and thereby the magnetic component is removed. Through this magnetic Concentration of the ores brings an iron content, which was originally 15 to 20%, to around 65% elevated.

Before the ore is subjected to magnetic separation, it must be ground to a proportionate grain size. When using _r of dry mills, in which the ore is crushed dry, the ground material is transferred by a gas flow from the mill in a dust separation apparatus to the ground ore from the gas stream to remove. The dust collected in the dust separator is then passed into storage containers, from which it is later passed through magnetic separators, in which the magnetic component is removed from the passage. It is also already known to separate the magnetizable components from blast furnace gases by arranging magnetic rods or slats, but the non-magnetic dust passes through the chambers unaffected.

Furthermore, two corresponding ones are already available for the separation of dust and magnetizable particles Filters connected in series. It is true that with separate filter devices, the different Separate dust particles well, in certain applications, e.g. B. in the magnetic Concentration of iron ores, it is not important to separate all magnetic particles from the non-magnetic particles, but an ore that can be smelted or melted sufficiently easily, and this aim should be under Expenditure can be achieved at low cost, namely lower investment costs and lower costs per Ton of processed material.

The invention proposes the deposition in a device and allows the plant and To keep operating costs low. This advantage is e.g. B. decisive for whether the facility is in

Applicant:

Research-Cottrell, Inc.,
Bridgewater Township, NJ (V. St. A.)

ίο Representative: Dipl.-Ing. H. Schaefer, patent attorney,
Hamburg 1, Lilienstr. 36

Claimed priority:
V. St. ν. America, December 22, 1955 (No. 554 763)

Lawrence Morris Roberts,
Bridgewater Township, Bound Brook, NJ

(V / St. Α.),
has been named as the inventor

Can be used economically for the concentration of iron ores with low iron content. The invention also has the purpose of such grinding plants for iron ores, the risk of Reduce silicosis.

According to the invention exist in an electrical separator of the type mentioned the side walls of one or more gas passages forming collecting electrodes made of a non-magnetic Material and carry several parallel or perpendicular to the direction of flow of the gas permanent magnets arranged at a mutual distance, furthermore the collecting electrodes are as endless belts are formed, and they are preferably each by means of a drive from the gas passage zone movable out into a zone closed off from the gas passage, in which the to Permanent magnets adhering parts removed mechanically in a manner known per se be, while the non-magnetic material with the help of a known vibrator is removed from the collecting electrodes within the gas passage zone, and it is for the Gas passage zone and the closed zone provided separate output channels.

The invention is shown schematically and by way of example in the drawing. It shows

109 747/501

3 4

Fig. 1 is a side view of the separator in section, brushes are arranged between the side walls 72 of the Genach line 1-1 in Fig. 2, the housing and the outer returning parts of Fig. 2, a plan view of the separator according to endless belts 66 at a distance from one another. Fig. 3, arranges. Each brush 70 is shown with its lower end Fig. 3, a side view of Fig. 1, 5 rotatable in a bearing 74 on frame parts 76 ge-Fig. 4 is a section along line 4-4 in Fig. 1, stores. The upper ends of the brush axles protrude in FIG. 5, a section along line 5-5 in FIG. 1, through bearings 78 and carry worm wheels. The upper screw wall 12 with two insulator housings 14 are attached to shafts 84 which are located above the upper housing wall 12, designed as a collecting funnel 16 in the lower part and transverse to the direction of flow, which extend an outlet 16 'for the non-magnetic. Each shaft 84 is made up of a motor 86 of material. The gas passes through the inlet 18 in a driven manner. The rotating brushes 70 remove into the separator and leave it through the Ma outlet 20 collected on the permanent magnet 68. Between the gas inlet 18 and the material, as will be described later.
Outlet 20 are parallel gas passages 22 and 24 15 Fig. 5 shows that the gap is provided between the housing side wall 72, in which the cylindrical die are arranged with their upper ends on a high-voltage brush 70, opposite the gas space voltage frame are suspended, which is divided from longitudinal rods by separating plates 88. The metal sheets 88 28 and cross bars 30 are made. The crossbars 30 ao are at the ends of the spaces parallel to the axes of the rollers 44 and 46 and 14 are attached to insulators 32 and 32 'in the insulator housings. The bushing insulator 32 'is connected to a high voltage line 34 to create a quiet zone in the space. To prevent the magnetic material removed from the magnets through the side walls of the gas passages 22 and 24 (FIG. 3, brushes 70 in FIGS. 3 to 5) from passing through the gas flow, they consist of collecting electrode assemblies. The aforementioned interstices 36, 38, 40 and 42 (Fig. 4). The outer spaces continue downward in parallel to the orders 36 and 42 are formed identically, as are side walls 72 extending channels 90, the inner arrangements 38 and 40. The outer ones which extend down into the outlet 16 ' . Precipitation electrode assemblies 36 and 42 are In these channels, this is done by the brushes from each of a pair of rollers. The rollers 44 and 30 magnetizable material removed from the magnets 46 of these roller pairs are separated at the ends of the gas, collected and discharged from the housing, passages 22 and 24 are arranged with vertical axes. The upper ends of the rollers 44 are rotatable 40, which bear the inner limits of the gas channels 22 bar in bearings 48 which form in the upper wall 12 and 24, are constructed similarly to the andes housing 10 (see Fig. 1 and 2). The 35 orders 36 and 42. They consist of vertical lower ends resting in bearings 50 (see Figs. 3 and 4). Rollers 94 and 96, which are in bearings 98 at the bottom and at the top. The bearings 50 rest on a support frame 52. Which are supported respectively 100 (Fig. 4). The axes of the lower ends of the rollers 46 are supported in bearings 54. Rollers 96 are supported at the upper ends with worms, which are also supported by the frame 52 provided with wheels 102 which mesh with worms 104. The axes of the rollers 46 protrude from the upper 40. The worms 104, like the worms, pass through bearings 56 and are driven outside 60 via the shaft 62 from the motor 64. The same is provided with worm wheels 58 which (see FIG. 2) .

Combing snails 60. These are connected via rollers 94 and 96 of each electrode unit

Drive shaft 62 driven by a motor 64. 38 and 40 runs an endless belt 106, which on his

Around the rollers 44 and 46 an endless belt 45 runs on the outside with spaced apart

66 um, which is provided over the entire height of the gas-penetrating permanent magnetic rods 68 '(FIG. 5)

let stretches. The bands 66 are made of thin is, which are formed in the same way as the

Brass, conductive, synthetic or natural magnet 68 described above.

Rubber or other suitable material. At the between the opposing inner ones

Upper sides of the belts 66 are lowered at intervals. Parts of the endless belts 106 are several

Right rods 68 made of magnetic material cylindrical brushes 108 rotatably mounted, which like

solidifies. The rods 68 are designed as permanent magnets with the brushes 70 described above,

formed with the magnetization direction parallel. The lower ends of the brush 108 are in bearings

to its thickness, so that a uniform magnet 110 supported on a beam 112 is supported

table field is present over its entire length. 55 are. The axes of the brushes protrude at the top

Good results are achieved when the rods are on the same through bearings 114 and with

the belts 66 are attached so that the PoIa worm wheels 116 provided with worms

Combine each rod of a ribbon in the same direction. The snails are on the waves

tion extends. Square, round, semicircular, 84 attached, those of the motors 86 also the horseshoe-shaped or other shaped magnets 60 drive worms 82 for the outer brushes 70,

can be used for the endless belts. While the brushes 70 only one endless The endless belts can also clean the belt with the belt axis, and the brushes 108 clean at the same time

at right angles to the direction of gas flow, instead of parallel, the two bands of the inner electrode arrangement

as shown, lie. 38 and 40.

Each of the outer collecting electrode arrangements 65 The space in which the brushes 108 are recessed 36 and 42 are arranged with several cylindrical brushes is provided at the ends between the rollers of brushes 70, the axes of which are parallel 94 and 96 , each separated by a separating plate 120 the axes of the rollers 44 and 46 lie. They closed. This gap closes

down a channel 122 into which the material removed by the brushes 108 from the magnetic bars 68 'falls.

In order to remove the non-magnetizable material from the collecting electrodes 36, 38, 40 and 42 , each of the electrode units is provided with an electrical or pneumatic vibrating device 124. The vibrators 124 act on the vibration transmitting rods 126, so that the precipitation electrode assemblies are vibrated upon actuation of the vibrator 124 between each pair of rollers 44, 46 or 94 96 extend. To start up the separator, the motors 64 and 86 are switched on, so that the brushes 70 and 108 rotate and the endless belts 66 and 106 with the permanent magnets 68 and 68 ' these first through the gas passages 22 and 24 and then in the cleaning zones on the brushes Guide 70 and 108 along. The high voltage spray electrodes 26 are energized and a gas stream containing magnetizable dust is sent through the housing from inlet 18 to outlet 20 so that it passes through gas passages 22 and 24 . The dust particles are deposited on the collecting electrode arrangements 36, 38, 40 and 42 . The magnetizable particles are held in place by the magnetic rods 68 and 68 ' , so that when the vibrators 124 are actuated, the non-magnetizable dust particles are knocked off the rods and the spaces between them and fall downward out of the housing. As a result of the magnetic attraction between the permanent magnets 68, 68 ' and the magnetizable particles, these are not knocked off by the vibration impacts exerted on the collecting electrodes. Rather, the magnetizable particles are removed by the rotating brushes 70 and 108 when the rods 68 and 68 'come into the rest zones between the separating plates 88 and 120 . The magnetizable particles fall there into the dust channels 90 and 122, from which they can be discharged separately from the remaining dust.

The gas stream leaving outlet 20 is freed from both the non-magnetizable and magnetizable dust particles and can be released into the atmosphere or sent back through the mill to again pick up finely ground particles and feed them into the separator.

The invention can be modified in many ways. For example, the rotating brushes 70 and 108 can be replaced by flowing gas or liquid which flows past the magnetic rods, so that the magnetizable particles are obtained in a slurry.

Claims (5)

PATENT CLAIMS: 1. Electrical separator for cleaning both magnetic and non-magnetic components containing gases using devices for magnetic and electrostatic separation, with large-area precipitation electrodes and spray electrodes between the gas inlet and gas outlet, characterized in that the side walls of one or more gas passages forming the precipitation electrodes from consist of a non-magnetic material and carry several permanent magnets arranged parallel or perpendicular to the direction of flow of the gas at a mutual distance, so that the collecting electrodes are designed as endless belts, preferably by means of a drive each, can be moved out of the gas passage zone into a zone closed off from the gas passage, in which the parts adhering to the permanent magnets are removed mechanically in a known manner, while the non-magnetic material with HiKe is a known Rüt teleinrichtung is removed from the collecting electrodes within the gas passage zone, and that separate output channels are provided for the gas passage zone and the closed zone. 2. Separator according to claim 1, characterized in that the permanent magnets are rod-shaped are. 3. Separator according to claim 2, characterized in that the direction of magnetization the rod-shaped permanent magnet runs transversely to the gas flow. 4. Separator according to claims 1 to 3, characterized in that in the closed Zone stripping agent, e.g. B. rotating brushes to remove the magnetizable particles are provided by the permanent magnets. 5. Separator according to claims 1 to 3, characterized in that the removal of the magnetizable particles from the permanent magnets within the confined zone takes place by means of a gas or liquid jet. Considered publications:
German patent specifications No. 169 817, 378 286,
600, 734 137; Austrian patent specification No. 61673. 1 sheet of drawings © 109 747/501 11.61