WO1997013008A1 - Device for feeding raw material into aluminium electrolysis baths - Google Patents

Abstract

In order to simplify design and improve the dissolving conditions of alumina in an electrolyte, the heated cover plate of the electrolysis bath is provided with a storage hopper and a 0.5-1.5 mm wide metering slit underneath the hopper. The device has a unit for altering the width of the slit (10) and the quantity of alumina discharged. The unit takes the form of a wedge mounted on the inner inclined surface of the storage hopper so as to be capable of being displaced and fixed on it. The cover plate comprises feed and non-feed sections which are arranged around the perimeters of the anodes and are removable should it be necessary to open up the bath. The total length of the feed slit of the device depends on the strength of the current applied to the electrolysis baths. The feed sections can be additionally heated by a layer of alumina. The plates are supported on the cathode jacket and suspended on anode frame or anode lining structures and can also be mounted from above on the anodes of electrolysis baths with calcined anodes.

Description

ννθ 97/13008 ΡСΤ / ΤШ95 / 00215

ΤΡΟΤΡΟΤΡΟΤΒΟΤΒΟΟΟΟΟΟΟΟΟΟΟΟΟΡΡΡΡΡΡΡΡΡ ΒΑΑΜΜΗΗΕΒΕΕΕ ELΕΚΤΡΟLIZΕΚΤΡΟY

Area of technology

5 The invention is based on an aluminum electrolytic metal that is used to produce this metal electrolytic clay alloy.

PREVIOUS LEVEL OF TECHNOLOGY

10

With the existing service technology for aluminum electrodes between the anodes and the vertical wall circuit, the battery is disconnected from the ground by the earth. Use of medical equipment by using

15 different movable mechanical devices. The bits and the clay are loaded into the electrics. Π Much more efficient, well-known, well-known solutions use devices for "uninterrupted" power supply of clay (ГΗГ) that is calculated or calculated.

20 GPG devices are of a good type, for example, in the case of an automatic certificate CCC Ν 526682, patent USA τ 4.849.529.

Another well-known type of boot device is the "dot" type device, which includes a boot device

25 or any other product or product (US Patent ΝΝ 3.681.229; 3.901.787; 3.371.026, applications for the United States Ν 2.058.137; France Ν 2.036.896; Japan 75 57-175).

All noted technical solutions provide for the supply of raw materials - alumina or alumina with added additives

30 salts in the electrolyte through the shell, which has been manufactured on its surface. Actually, and this partly disrupts or suppresses.

The PSG devices have a balanced or point type, which are relatively complex, since they contain mechanical disruption systems, power short-circuit,

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2 overriding elements, etc. Κροme τοgο with ποmοschyu τaκiχ usτ- ροysτv ποdacha glinοzema in eleκτροliτ προizvοdiτsya lοκalnο, τοlκο in mesτe iχ usτanοvκi, chτο chasτο sοπροvοzhdaeτsya ποda- whose izbyτοchnοgο κοlichesτva glinοzema and οbρazοvaniem οsadκοv in ρasπlave.

Suschesτvοvanie κορκi on ποveρχnοsτi eleκτροliτa sο slο- eat glinοzema on it and πeρiοdichesκοe massοvοe, chasτichnοe or lοκalnοe ρazρushenie κορκi svyazanο sο znachiτelnymi eneρgο- and τρudοzaτρaτami and τaκzhe with uχudsheniem eκοlοgichesκiχ χaρaκ- τeρisτiκ προtsessa.

The possibility of maintaining electrical energy in the liquid state (without a cradle) thanks to the use of the lost heating plate. The offer of this product is known to the extent that the technology for the production of aluminum is caused by electric alloys. )

Downloading electricity from such a type is carried out through failure to pay a fortune. How to use the lost plate from the loss of clay through the removal of clay in it is also written in the US patent Ν 3.839.167 (1973).

Β Known solutions to the loss of the plate do not contain the devices for the extraction and are not suitable for the inaccessible and the transfer of raw materials to the electric.

DISCLOSURE OF INVENTION

Known devices for the supply of raw materials to an aluminum electrolyzer have a difficult operation, and inadequate reliability and consumptions of operation of the equipment. The elimination of these disadvantages is the main task of the present invention.

Another task is to improve the conditions for the introduction of clay in the elec- trulizer and its dissolution in the elec- tricity. The first task is solved thanks to the cooperative connection of the panel for the loss of the elec- tler and the power supply. With this, the application of the lost cooker plate ensures the operation of the elec- tronic without the use of a switch on the elec- tricity of the elec-

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3 and, therefore, the need to use mechanisms to destroy the destruction disappears. Alumina is supplied in the elec- troelectric system through a slot of a given section in

5 plate of loss. An accumulating bunker for alumina was made over the slit, just 5 times it can be a single unit with a stable plate.

The solution of the second problem is ensured by the application of a new construction of the spare element - the slit is adjustable

10 readings, through short-lived alumina, is supplied in the electrolysis is not primary, but continuous. Κ In addition, the raw materials are supplied to the user at the expense of 10 plate of the gas phase in the form of tapes, which is bypassed by the exhaust gas. This improves the conditions.

15 Alumina depletion excludes local re-cooling of the melt, the formation of a cutter on the turn-over of the elec- troite, or the loss of alumina in the sediment.

Brief Description of the Drawings 20

The invention is illustrated by the best way of carrying out the invention, illustrated in the drawings, where: in Fig. 1, the claimed device is shown in the plan; on fig.2 - ρazρ without fig.1 πο Α-Α; 25 in FIG. 3 and 4 - the same device in the plan (Fig. 3) and in the vertical section (Fig. 4) with the introduction of a wedge that regulates the width of the gap; on Fig. 5 - a diagram of the installation of the device on the electric power supply with the anode of the Zaporizhia; 30 in FIG. 6 - a diagram of the installation of the device on the electric with burnt anodes.

BEST MODE FOR CARRYING OUT THE INVENTION

35 Devices from a loss plate 1 made from carbide, brown, fatty or other fatty substances

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4 units. The large bunker 2 is an integral part of the loss plate, in addition to a large bunker, a slit of 3 is wide and 1.5 mm long. Slab 1 has been lost

5 with a clay or a mixture of aluminum oxide and phosphate salts 4. Black clay or clay with additives 5 from a bulk bunker 2 has 3 gaps. The end of the clay is determined by changing the width of the slit b, its length 1 and the angle of the wall

10 richest bunker.

Dry clay can also be regulated by the use of cash cards 6 (Fig. 3.4), which is equipped with a built-in cash-on-board.

Slab-wedge may be performed as a metal, for example,

15 cast iron, tobacco and ceramic. The movement of the plate-wedge 6 at the wall of the bunker is caused by a change in the width of the slit L and the discharge of clay through the slit.

For electrics with anodes on the side of the section, the connected devices are mounted on the side of the hard drive

Κοsτi anοdnοy ρubashκi 20 (a-c πο φig.5) and οπiρayuτsya dρugοy κροmκοy on κaτοdny κοzhuχ 8. eleκτροlizeροv with οbοzhzheny- E anοdami usτροysτvο 1 mοzheτ usτanavlivaτsya, naπρimeρ between vnuτρennimi ρyadami anοdοv τaκ 9, κaκ eτο ποκazanο on φig.6 , or be weighted down to the features of the anodic frame.

25

The device operates the following way.

From the systems of centralized distribution of alumina, raw materials are supplied to storage bunker 2 and then through slot 3 of a predetermined cross-section, it is continuously emitted to the electrolite.

30 For the separation of the required size of the cross section of the slit, the receiving unit is conveniently implemented on a large stand with the use of technical clay.

With a change in the angle of expansion of the walls of the bulk bunker, the width and length of the slit, disappearing experiments were obtained

35 total dependencies of clay consumption through a gap from the power supply of the power supply.

It has been found that the slot width (η) can be set in

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5 items from 0.5 to 1.5 mm. The replenishment of the gap of less than 0.5 mm in the operation of the heat-resistant plate is difficult to maintain and must be maintained in the process of operation. According to the experimental data of an alumina particle, a gap can be filled up.

5 wide less than 0.5 mm. The use of a gap wider than 1.5 mm is also inappropriate due to the high rate of alumina flow, deterioration of the conditions for its dissolution in aluminum and aluminum sludge. The optimum value of 1ι is set in a range of 0.8 to 1.2 mm.

10 The width of the slit b, and after it, the clay is discharged by moving the plate-wedge 6 (Fig. 3.4) in the direction indicated by the arrows.

Relatively different elec- tric power capacities of alumina discharges through a slit of suitable equipment

15 you are asked, mainly, with a length of 1 access slot. So for the range of the commonly used force of the current on the bath, there is 75 output and, accordingly, there is a gap

1000 up to 4000 kg / day on the electrolyzer ρ the values of the slit length π and b = 0.8 mm change from 290 mm to 1150 mm (table 1).

20 Table 1

Experimental data on the value of the length of the flowing slit for clay sandstone type

= 58 for electric power plants with different daily alumina

25 (current strength in the range from 75 to 300 κΑ)

Daily yield 1000 2000 3000 4000 alumina, kg / electricity

Values of b, mm 0.8 1.2 0.8 1.2 0.8 1.2 0.8 1.2

Experimental values 1, mm 290 222 575 440 862 658 1150 878

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6

In general, the implementation of the device on a standard stand has shown that for electrical use, any available space is available for a longer distance of 1200. Consequently, in the system of the loss of elec- toris- s, it is enough to have 1-2 lost heaters of the device of a convenient type. Other plates - sections for the destruction of the electrolyzer are carried out without a bulk bunker and a dropping slot.

With the economic inconvenience of electric power growth, 10 zera heat-resistant plates can be easily removed with a large capacity or a large capacity. The loss of benefits may also be subject to hatching, which does not constitute a hassle.

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Claims

\ νθ 97/13008 ΡСΤ / ΙШ95 / 00215ΦΟΡΜУЛΑ ИБΟБΡΕΤΕΗИЯ

1. DEVICES FOR THE DELIVERY OF RAW MATERIALS TO ALUMINUM ELECTRICIZERS SUPPLIED WITH A PLASTIC CLEANER

5 that it was made in the form of a slit in the plate of acceleration and a large bunker located above it.

2. DEVICES FOR OPTION 1, INCLUDING THERE, THAT THE REACHING SLIT IS A MULTI-CORNER SECTION WITH A WIDTH OF 0.5 TO 1.5 MM.

10 3. INSTRUCTIONS π 1, so as to be equipped with a knot for adjusting the width of the slot.

4. INSTRUCTIONS FOR FIRST WITHOUT THERE, THAT THAT THE REGULATING UNIT OF THE SLIT WIDTH IS PERFORMED AS A WEDGE INSTALLED ON THE INTERNAL EXTERNAL FULL

15 telnogo bunker with the possibility of moving and fixing on it.

5. Convenience to any of the previous paragraphs, otherwise, an accumulative bunker is carried out as a whole with a profitable loss.

6. A device for any one of pp. 1-5, which is characterized by the fact that the plate of loss is mitigated by the clay layer located on it.

7. INSTRUMENTS π 1, so that, moreover, the plates are backed up by the consumer and are suspended by the operating instructions

25 pits of an ancestral rama or anodnaya rubashki.

8. INSTRUCTIONS FOR OPP.1, INCLUDING THERE, THAT THE PLATES ARE INSTALLED ON THE ANODES OF THE INTERNAL TYPES OF BATHES WITH EXCESSED ANODES.

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