Dissolving station for copper cyanide
The dosing system was designed according to drawing no. A10690 for the
preparation of calcium cyanide and copper cyanide solution.
The tank has a volume of approx. 1170 litres and is filled with water
via an angle seat valve and with beads/scales/flakes via a feed screw.
The dilution water is filled via a solenoid valve and a downstream
angle-seat valve for volume adjustment. A spray nozzle in the aeration
and deaeration dome prevents vapours from escaping when filling the
tank.
The water supply is shut off by a ball valve and the flow rate is
adjusted by an angle seat valve. The extraction is switched on or off
via the control unit.
The feed screw first conveys the dry material into a two-stage
shredder. From there, the dry material enters the container. The
quantity of dry material conveyed is regulated via a slide valve on
the feed screw. A suction device is mounted on the hopper of the feed
screw. The suction device is equipped with a lamellar rubber curtain
to prevent direct contact with the dry material. The hopper is fitted
with a protective grid. A further suction device is located on the
container. The extracted vapours from the two extraction devices are
brought together in an absorption vessel via hose lines.
When filling the hopper of the feed screw and loading the container
with dry material, it is necessary for both extraction devices to be
switched on.
The absorption vessel must be placed and mounted in a suitable
position on site using a frame for wall mounting. It must be ensured
that the hose lines are supported on site using suitable means if
necessary. Kinking of the hose lines must be prevented at all costs to
ensure that the vapours are properly conducted into the absorption
vessel. The vent connection on the absorption vessel must be connected
accordingly on site.
The various fill levels in the container (DRY + EMPTY / MAX-MAX) are
detected by fill level limit switches. The level limit switch for "DRY
RUN + TANK EMPTY" is height-adjustable. The fill level in the
container can also be checked on the visual fill level indicator. The
temperature in the container is displayed via a bimetal thermometer.
The U51258834 container is equipped with an electric agitator for
even mixing of the solution. The finished solution is removed or the
container emptied via a ball valve at the bottom of the container
jacket.
The absorption vessel is emptied into the container via a hose line.
It is important to ensure that the washing liquid in the absorption
vessel is changed at regular intervals. The dosing system is equipped
with a control unit.
The pipework consists of the following components
- Ball valve for end shut-off Filling
- Solenoid valve for filling shut-off
- Angle seat valve for water dosing
- Ball valve for water supply Spray ball
- Solenoid valve for shutting off spray ball
- Angle seat valve for water dosing Spray ball
- Ball valve for removal
- Ball valve for emptying
- Ball valve for emptying when cleaning the supply hopper and the feed
screw
It was never installed and never put into operation.
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