Page 28 - february

METALWORKING EQUIPMENT AND TOOLS

Fig. 6. Magnetic separator. 1 - body, 2 - partition, 3 - scraper, 4 - drum, 5 - magnetic system, 6, 7 - supports, 8 - drive.

The exhaust air leaving the sand cooling line units needs to be cleaned, for which the
liquid precipitator is designed, shown in Fig. 5. It uses the principle that, due to different
masses, gas molecules and dust-like inclusions have different energies in a moving stream. The
contaminated gas flow through the pipe 3 of the cover enters the cavity of the body 4. A deflector
at the end of the pipe directs the incoming flow to the water poured into the bottom part 6 of the
precipitator through the water circulation system 1. The inclusions and the dusty part, when the
gas flow turns near the water, settle in the water and accumulate. The accumulated sludge goes
down through the drain pipe of the bottom 6 of the precipitator. The water level during filling is
controlled by the control tube 5 and must be below the level of the deflector. The water droplets
captured by the gas flow are beaten off by the mesh water deflector 2 by the upper screen and
the upper deflector of the cover pipe 3. The settled water through the water circulation system
again enters the bottom. The cleaned gas is discharged through a side opening in the upper part
of the housing 4 to the following technological equipment: to a pump, expander, etc.
Before sand is fed to the screening and cooling operations, it is subjected to magnetic
separation. The magnetic separator shown in fig. 6 is designed to trap magnetic metals from
the molding material. It consists of a rectangular body 1 with sides at the top and bottom. In

28 Stanochniy park