SU403782A1 - DEVICE FOR GAS TREATMENT FOR EXTRACTING, TRANSPORTING AND CLEANING APPOD PINS - Google Patents

Description

one

The invention relates to devices used in the production of aluminum by electrolysis, and can be used to trap harmful gases.

A device is known for trapping gases released during the extraction of anode pins by a movable rod from a self-baking agent, an anode of an aluminum electrolysis cell. It consists of a flexible suction, a tube and a suction head consisting of two parts, which open up when the pins are pulled out. The other end of the suction tube is attached to the burner.

The proposed device is characterized in that it is made in the form of a telescopic chamber equipped with unors in contact with the stops of the movable rod, the mutually balanced chamber and its skirt being gripped on it.

This improves the sanitary and hygienic working conditions in the electrolysis shop by trapping gas emissions during extraction, transportation and cleaning of the anode posts.

FIG. 1 shows the proposed device; in fig. 2 - the same, in a section; in fig. 3 - the same, in different positions.

The trolley / overhead crane is supported by rollers on bridge 2. The boom 3 is suspended by a chain hoist on a winch 4. The traversing chain hoist is pivotally connected to the rod and

It has vertical guides rigidly mounted on the downwardly projecting frame of the trolley — the shaft of the rod. The hollow rod, of square section, passes through the square hole of the gear wheel 5, to which rotational motion through the gear and intermediate shaft from the drive 6 is communicated. The lower end of the rod is equipped with an automatic gripping head of the design,

which is used to attach the pin 7 to the rod at the time of its removal from the self-burning anode and the subsequent transportation and cleaning of the pin on a special vertical machine.

The device is made of mutually balanced chambers 8 and a skirt 9 encircling it, suspended on a cable (or chain) suspension 10. Suspension rollers are fixed on the yoke 11, which is rigidly connected to the gear wheel 5 of the rod turning mechanism. The core bar and its cavity are used as a mobile gas pipeline, for which its upper end is connected by a telescopic pipe 12 to a fan 13 and

dust collector M, made in the form of a rod of dust-collecting chamber closed along the perimeter of the shaft with a filter 15. The filters are located on the side opposite to the side of the inlet of the discharge branch pipe of the fan ..,

The chamber 8 is divided by a perforated partition into the inner 16 and outer 17 cavities. The internal cavity engages the bar and serves as a guide for its movement. The rod in the lower part has four lateral holes 18. When the rod moves down or up while the camera is stationary, the holes in the rod alternately mix with the holes in the chamber partition. The holes adjoin each other: their partition walls are arranged vertically in a staggered manner, as a result of which, when the rod moves relative to the fixed chamber, its external cavity 17 constantly communicates with the cavity of the rod.

When moving up and down, the rod automatically changes the camera's reach in height by means of the stops J9 and 20, which are located on the bottom of the rod and the internal cavity of the camera.

When the boom moves upwards with the anode pin 7 suspended on the pick-up head 2.1, the latter is pulled into the internal cavity of the chamber, and the skirt 9 moves downward, covering the lower part of the pin, which gives off gases. When the rod moves down after contacting the stops of the rod with the lower stops of the chamber, the latter moves down and does not go up through the suspension skirt, opening the gripping head to hit it on the pin before removing it from the anode or installing it into the anode.

Gas capture does not occur from the very beginning of the pin extraction operation, since an upward flow of gases is formed immediately after some lifting of the pin from its sintering zone in the anode. In the initial extraction period, the gas trap is carried out with a fixed chamber until the rod stops touch the upper stop of the chamber.

The cross-section of the perforation holes and the dimensions of the chamber are taken such that the main part of the gases is sucked out through the slot of the outer cavity J7 open at the bottom, and small

part - through the perforation holes. This makes it possible to reduce the contamination of the upper contact surface of the pin and the gripping head by the upward flow of gases.

Before removing the pin, the bottom edge of the skirt is aligned with the bottom edge of the chamber, which corresponds (device in the initial position /) to the smallest outreach of the chamber and provides sufficient visibility of the gripping head lifted above the pins of the electrolyzer.

When installing the gripping head on the pin of the lower horizon (position //), the suction holes of the rod are aligned with the lower

the perforations of the chamber and the balancing skirt are in their highest position.

In the /// position (intermediate position when removing the pin), the rod stops touch the top of the chamber, and a part of the pin enters into its internal cavity. Gas is aspirated through both the bottom slit and through the perforations. The upper extreme position of the pin (position / V) corresponds to the largest departure of the suction chamber, while the pin is almost completely covered with a skirt. The lower end of the pin is left visible for orientation as it is fed to the cleaning machine.

subject matter

A device for trapping gas when extracting, transporting and cleaning anode

pins of aluminum electrolysis cells, including a movable rod for extracting pins, characterized in that, in order to improve sanitary and hygienic working conditions, it is made in the form of telescopic

the camera is equipped with stops in contact with the stops of the moving bar, the mutually balanced camera and its skirt gripping on the suspension.