RU208323U1 - DEVICE FOR LOADING FLUID RAW MATERIALS INTO ELECTROLYSER FOR PRODUCING ALUMINUM - Google Patents

Abstract

The utility model relates to the field of non-ferrous metallurgy, namely to devices for technological maintenance of electrolyzers for producing aluminum by the electrolytic method and can be used to load bulk raw materials into an electrolytic cell for aluminum production, equipped with top or side bins for automatic supply of alumina (AAG) or automatic supply of fluorosalts ( APF). The device contains a hopper for bulk raw materials, equipped with an unloading auger with an unloading basket at its end, in which a filter is built-in, made of filter material, which is hermetically fixed by a frame to the opening in the unloading basket, a flange with an elastic coating is installed in the lower part of the basket for the possibility of tight clamping to the cell bunker. The objective of the utility model and the technical result is to reduce the loss of raw materials, which improves the environmental situation, by dedusting the air displaced from the cell hopper when loading raw materials by increasing the durability of the filter material.

Description

Technology area

The utility model relates to the field of metallurgy of non-ferrous metals, namely to devices for technological maintenance of electrolytic cells for the production of aluminum by the electrolytic method and can be used to load bulk raw materials, for example, powder or granular alumina, fluorine salts, their mixtures or similar powder materials, into an electrolytic cell for aluminum production equipped with top or side bins for automatic feeding with alumina (APG) or automatic feeding with fluorosalts (ACF).

State of the art

A universal machine for transporting and loading bulk materials into an electrolyzer is known from the prior art (RF patent for invention No. 2608013, IPC C25C3 / 14, published on January 11, 2017), containing a hopper for bulk raw materials installed on a self-propelled chassis with a cabin, equipped with an unloading auger with an unloading basket at its end for loading bulk raw materials into the electrolyzer hopper. The unloading basket of the unloading auger is designed in such a way that, when loading the material, it can be installed on the side hopper of the APG hermetically through an elastic element, which excludes dusting and spilling of raw materials. To remove dusty air saturated with raw materials from the APG bunker during raw material loading, which is displaced by the loaded alumina, a pipeline with flexible inserts is provided, fixed on the unloading auger, through which the air saturated with raw materials enters the machine bunker. The disadvantage of this analogue is the complexity of the filtration system design. In addition, due to the gradual sedimentation of raw materials in the pipeline, there is a high probability of clogging and the release of untreated air, which leads to losses of raw materials and environmental pollution.

From the prior art, there is a known machine for the upper distribution of alumina into bunkers of electrolyzers (RF patent for industrial design No. 56790, MKPO 12-13, publ. 16.05.2005), containing a bunker for bulk raw materials installed on a self-propelled chassis with a cabin, equipped with an unloading auger with an unloading basket at its end for loading bulk raw materials into the upper bins of the electrolyzer. The gap between the unloading auger and the unloading basket is closed along the contour with a filter cloth, which provides filtration of dusty air saturated with raw materials leaving the bunker of the electrolyzer when loading raw materials. The disadvantage of the analogue is the low durability of the filter cloth due to the mobility of the unloading basket relative to the unloading auger and, as a consequence, the release of untreated air when the filter cloth is damaged and the environment is polluted.

The closest analogue in technical essence is a machine for transporting and loading bulk raw materials into an electrolyzer for aluminum production (RF patent for invention No. bulk raw materials, equipped with an unloading auger with an unloading basket at its end for loading bulk raw materials into the upper bins of the electrolyzer. The gap between the unloading auger and the unloading basket is closed along the contour with a filter cloth, which provides filtration of dusty air saturated with raw materials leaving the electrolyzer bunker when loading raw materials, and a flange swinging on hinges allows the unloading basket to swing freely, ensuring tight installation of the basket on the electrolyzer bunker when loading raw materials ... The disadvantage of the analogue is the low durability of the filter cloth due to the mobility of the unloading basket relative to the unloading auger, the likelihood of the accumulation and clogging of the space under the filter cloth from the inside above the flange of the unloading basket with the raw material and, as a consequence, the release of uncleaned air if the filter cloth is damaged, which leads to losses raw materials and environmental pollution.

Disclosure of a utility model

The task of the utility model and the technical result is to reduce the loss of raw materials, which improves the environmental situation by dedusting the air displaced from the electrolyzer bunker when loading raw materials by increasing the durability of the filter material.

The technical result is achieved due to the fact that in the device for loading bulk raw materials into an electrolyzer for aluminum production, equipped with upper or side bins for automatic feeding with alumina (APG) or automatic feeding with fluorine salts (ACF), containing a hopper for bulk raw materials, equipped with an unloading auger with an unloading basket at its end, new is that a filter for cleaning dust from the air displaced from the electrolyzer bunker is built into the unloading basket, made of filter material, which is hermetically fixed by a frame to the opening in the unloading basket, in the lower part of which there is a flange with an elastic coating for the possibility hermetic clamping to the electrolyzer bunker.

The utility model is complemented by particular distinctive features that contribute to the achievement of a technical result. The unloading basket is fixed to the unloading auger by means of a branch pipe made of elastic material. The filter material is secured with a frame by means of fasteners.

Brief Description of Drawings

FIG. 1 shows an enlarged detail of the unloading basket.

FIG. 2 shows a sectional view of the discharge neck along arrows A-A in FIG. one.

FIG. 3 shows a general view of the machine from the front with a device for loading raw materials with an unloading auger in working position.

List of structural elements:

1 - unloading basket;

2 - filter;

3 - filter material;

4 - frame;

5 - fasteners;

6 - basket flange;

7 - elastic coating of the flange;

8 - elastic pipe;

9 - unloading auger;

10 - bunker;

11 - self-propelled wheeled chassis;

12 - operator's cabin;

13 - electrolyzer bunker.

A device for loading bulk raw materials into an electrolyzer for aluminum production contains an unloading basket 1, which, through an elastic branch pipe 8, made, for example, of a silicone pipe, is fixed at the end of the unloading auger 9. A filter 2 is built into the opening of the unloading basket 1 for cleaning dust displaced from the bunker electrolyzer 13 air. The filter 2, made of filter material 3, for example, a filter cloth, with a frame 4 with hermetically sealed fasteners 5, for example, bolts, is attached to the hole in the unloading basket 1.

At the bottom of the unloading basket 1, the basket flange 6 is rigidly fixed to it, to the lower plane of which, for example, with the help of glue, an elastic covering of the flange 7 is fixed, made, for example, of porous rubber.

The unloading auger 9 delivers raw materials to the unloading basket 1 from the bunker 10, which is installed on a self-propelled wheeled chassis 11. The operator is in the process of work in the operator's cab 12, mounted on a self-propelled wheeled chassis 11.

The difference from the analogue in the technical solution is the use of the unloading basket 1 of the unloading auger 9 with a built-in filter 2 for cleaning the air displaced from the bunker of the electrolyzer 13 from dust. The filter 2 built into the unloading basket 1 consists of filter material 3, which is sealed with a frame 4 using fastening elements 5 to the opening in the unloading basket 1.

The difference from the analogue in the technical solution is also the use of an elastic pipe 8, which allows the flange 6 of the unloading basket 1 to be hermetically installed on the bunker of the electrolyzer 13.

A device for loading bulk raw materials into an electrolytic cell for aluminum production works as follows.

Loading of raw materials into the hopper 10 of the machine is carried out in the loading area of the machines. The machine loaded with raw materials moves under its own power to the electrolysis building, where the bunkers 13 of the electrolyzer are loaded. To load the raw material into the bunker of electrolyzer 13, the operator installs the machine along the electrolyzer opposite the bunker, sets the unloading auger 9 with the unloading basket 1 to the working position, aligning and installing the unloading basket 1 on the loading opening of the electrolyzer bunker 13. The unloading basket 1 of the unloading auger 9 is installed on the bunker electrolyzer 13 is hermetically sealed thanks to the elastic coating 7 of the basket flange 6. The sealed installation of the unloading basket 1 excludes dusting and spilling of raw materials when loading the bunker of the electrolyzer 13. The unloading basket 1 is fixed on the unloading auger 9 hermetically due to the branch pipe 8 made of elastic material.

In the process of loading the bunker of electrolyzer 13 with raw materials, the air, which is displaced by the loaded raw materials, is removed from it through the filter material 3 of filter 2 on the unloading basket 1. The filter material 3 of filter 2 provides filtration of dusty air, saturated with raw materials, leaving the bunker of the electrolyzer when loading raw materials.

The use of an unloading auger 9 with an unloading basket 1 equipped with a filter 2 allows, when loading raw materials into the bunker of electrolyzer 13, to dedust the air displaced from the bunker of electrolyzer 13. The elimination of dusting reduces the loss of raw materials and improves the environmental situation.

The positive results of technical solutions were confirmed by production tests carried out in the electrolysis buildings of the aluminum plant.

Claims (4)

1. A device for loading bulk raw materials into an electrolyzer for aluminum production, equipped with bunkers for automatic feeding with alumina or fluorine salts, containing a hopper (10) for bulk raw materials, equipped with an unloading auger (9) with an unloading basket (1) at its end, characterized in that a filter (2) is built into the unloading basket (1), made of filter material (3), which is hermetically fixed by a frame (4) to an opening in the unloading basket (1), in the lower part of which there is a flange (6) with an elastic coating (7 ) for the possibility of hermetic pressing to the electrolyzer bunker (13). 2. A device according to claim 1, characterized in that the unloading basket (1) is fixed to the unloading auger (9) by means of a branch pipe (8). 3. A device according to claim 2, characterized in that the branch pipe (8) is made of an elastic material. 4. A device according to claim 1, characterized in that the filter material (3) is secured by a frame (4) by means of fastening elements (5).

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