SU117246A1 - Method for dry grinding of loparite concentrates - Google Patents

Description

Dry milling of loparite coicectrates is carried out mainly in mills with pneumatic transport and circulation of the material to be milled. However, when using this method; The grinding process produces radioactive dust, which leads to safety measures.

To use the radioactive dust generated and to rejuvenate working conditions, it is proposed to use chlorine gas as a transporting agent, which is then separately or topically with crushed concentrate and blown through the salt melter of the chlorinator, where chlorine is used as the main agent.

The drawing shows an installation diagram for implementing the proposed method.

Subject to grinding, the conglomerate is delivered in closed containers /, which serve as bunkers supplying the bulk unit 2 with the starting material. The concentrate with a particle size of 1 or less, characterized by high flowability, flows between the tracks of the existing unit at a speed of 10-15 m1 hour and is subjected to heating and drying. From the substantial unit 2 pairs and the gas is sucked off by the ventilation system through a special pipe 3 in the lid, under the action of its own weight, enters one of the D1 chamber feeders 4. After the feeder 4 is filled with dry concentrate, it is automatically disconnected from the drying unit and put in the system and connected via a feeder to a hermetic pneumatic mill 5, ventilated with chlorine. From the mill, dust together with chlorine is transported through a cyclone 7 to a salt with a molten salt.

The concentrate is fed into the melt to a depth of 1 -1.5 m, and the chlorine separated in the cyclone 7 along with the dust is fed under the layer of melts;