SU1186382A1 - Arrangement for removing ceramics from castings - Google Patents

Abstract

1. INSTALLATION FOR CLEANING CERAMIC CASTINGS, including alkaline and rinsing baths, perforated casting drums, an alkaline heating device, a drum rotation drive, f - ifA slurry tank, a sludge removal vehicle, an alkaline regeneration system featuring that, in order to improve the efficiency of removal of sludge from pacTiBopa and reduce the consumption of alkali, the sludge collector. placed at the side of the leaching bath and separated from it by a partition with a window located at a height above the level of the solution poured into the bath; the bottom of the leaching bath is inclined to the side wall and provided with a groove in which the vehicle is housed. ate with

Description

2. The installation of claim 1, which is equipped with a pre-flush bath in communication with the leach bath with an on-board (axial unit, the suction pipe of which is lowered to the bottom of the pre-flush bath, and the discharge pipe is located above alkaline level.

86382

3. Installation according to claim 1, about tl and so that the vehicle is made in the form of a bucket conveyor with a turning sprocket, the horizontal branch of which is located in the bath chute, vertical - along the partition of the sludge collector, and its turning sprocket is installed above the sludge collector the possibility of unloading into it forging conveyor.

The invention relates to foundry, in particular to cleaning in solutions of alkali castings obtained by produced models from the remnants of ceramics after its prior removal.

The aim of the invention is to increase the efficiency of removing the sludge from the solution and reducing the consumption of alkali due to the timely removal of larger particles of unreacted ceramics from the leaching bath and the return of alkali to it, carried out by the casting drums caught in the preliminary washing bath ...

FIG. 1 shows a schematic of the installation; in fig. 2 shows section A-A in FIG. one; in fig. 3 — node 1 in FIG. one.

The installation consists of a leaching bath 1, a sludge trap 2, a preliminary rinsing bath 3, a final rinsing bath 4, perforated drums 5 for casting loading (Fig. 2 with an asterisk 6 fixed to the shaft 7. At the working positions of the baths 3 and 4 the drums 5 are installed using the hoist trunnion 8 on the supports 9, mounted on the inside of the walls of the baths.

Dp of rotation of the reels 4, a chain drive 10 is installed with the drive 11. The contact of the drive sprocket 6 of the drum with the chain 10 is provided by the support rollers 12 and the tension 13.

Along the sloping bottom of the leaching bath, a horizontal branch of the bucket 14 transistor 14 with a drive 15 passes through the channel.

The conveyor chain 16 (Fig. 3 is equipped with buckets 17 tilting when the turning sprocket 1 8 passes and pouring the contents into the sludge trap. A window 19 is provided for returning the clarified solution to the leaching bath, and for periodically removing the precipitated sludge into the tank - the hatch 20. the collector 21 is designed to flush the sludge residue off the walls.

To drain the solution for regeneration, there is a valve 22 in the lower part of the bath. Sludge residues and flushing water are removed during cleaning of the bath through hatch 23.

The washed particles are collected in the pre-rinsing bath into the pan 24. The alkali solution is heated by steam heaters 25 (Fig. 2) of the water in the bath 4 of the final rinsing by bubbling the condensate through pipe 26. The excess water when the drum 5 is immersed from the bath of the final rinse is drained through slot 27 into receiver 28.

Dp pumping alkalized water from the pre-flush bath 3 as a diluent to the bath; the pump 29 was installed with the suction 30 and the discharge pipes 31.

The proposed installation works as follows.

Loaded castings drum 5 set on a free working

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position of leach bath 1. The drive sprocket 6 of the drum is engaged with the chain transmission 10, rotated from the drive 11.

As the drum 5 rotates, the castings collide and are intensely washed with boiling alkaline solution.

Ceramics on castings are weakened and, through the perforations of the drum, fall on the inclined bottom of the baths 3 and 4. Under the influence of a boiling solution of alkali, the precipitating ceramics slides from the inclined bottom into the groove where the bucket conveyor 14 is mounted. the buckets 17 move the sludge along the chute and, when the horizontal branch of the chain 16 passes into the vertical one, scoop the solution with the sludge and lift it up. When the chain sprocket 18 bends around the contents of the buckets 17, it is poured into the pick-up box 2, where the gaps settle to the bottom, and the cleaned solution through the window 19 returns to the bath of imitation. From the sludge collector, slots through the hatch 20 are periodically removed to the workshop tank and taken away to neutralization, the sludge remains are washed off with water from the collector 21, the hatch 20 is closed and the conveyor is turned on again.

After cleaning the castings, the drum 5 is moved by the hoist 5 to the working position of the pre-flush bath 3, where the pre-rinsing and cooling of the castings take place.

The water in the bath is saturated with alkali, carried by the drums with castings from the leaching bath. As you boil away and change the concentration of alkali 63824

The alkalized water can be pumped by pump 29 through the suction 30 and injection 31 pipelines, and the bath is filled with 5 water from the mains.

To trap the washed particles at the bottom of the pre-flush bath 3, a tray 24 is installed, which, after draining the water from the bath 10 through the valve, can be removed for cleaning with a hoist.

In the bathtub 4 of the final rinsing, the water is heated by condensation after the steam heaters 5 of the alkalization bath, which allows the use of secondary heat. Excess water flows out through the slot 27,: and when the drum is immersed in 5 castings, the forced water flows through the same 20 slot 27 into the receiver 28, and then slowly through the pipeline 30 it is discharged into the neutralizer.

After installing the drum on the working positions of the baths, they should be 5 closed with covers. For the steam-air mixture suction, all baths have side suction.

The proposed installation allows reducing the alkali consumption by Q more efficiently removing unreacted ceramics from the alkaline solution and returning back into the alkali-treating bath with drums from o-rasfBKatai and pre-flushing captured in the bath, reducing the cost of repairing the pumping unit, leaving only the function of pumping the solution to pereaepa noj to reduce energy costs Q, using condensate after steam heaters to heat the bath water of the final rinsing.

Suction

On regeneration 2Z.

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Claims (3)

1. INSTALLATION FOR CLEANING CERAMIC CASTINGS, including leaching baths and rinsing, perforated casting drums, alkaline solution heating device, drum rotation drive, sludge collector, sludge removal vehicle, alkaline solution regeneration system, characterized in that, for the purpose of increase the efficiency of removing sludge from the solution and reduce alkali consumption, sludge collector. placed on the side of the leach bath and separated from it by a partition with a window located at a height above the level of the solution poured into the bath, the bottom of the leach bath is inclined to the side wall and provided with a groove in which the vehicle is located. SU „„ 1186382 Phys. 1 2. Installation according to π. 1, which consists in the fact that it is equipped with a pre-wash bath communicating with the leach bath with a wagon, the suction pipe of which is lowered to the bottom of the pre-wash bath, and the discharge pipe is located above the level of the alkaline solution. 3. Installation according to π. 1, the fact that the vehicle is made in the form of a bucket conveyor with a swivel sprocket, a horizontal branch of which is located in the trough of the bathtub, a vertical branch along the partition of the sludge trap, and its swivel sprocket is mounted above the sludge trap with the possibility of unloading conveyor buckets into it.