Industrial companies consider Prayon’s tilting pan filter a highly reliable and efficient tool to produce phosphoric acid.
PROFILE has also developed a new belt filter.
The Prayon filter
Over 300 Prayon tilting pan filters have been sold since the 1950s, and approximately 250 installed in phosphoric-acid production units. The rest are used in other fields such as:
- Copper, cobalt, zinc and uranium hydrometallurgy;
- P2O5-impregnated active carbon washing;
- Phosphate washing;
- Acid filtration in general.
- A special compact vacuum box for separating gases and the various filtrates;
- A fast-drain filtration cell (pan) which can increase filter capacity and filtration yield;
- An automatic system to keep the pans horizontal;
- A new tilting-track design for higher rotation speed and filtration capacity;
- Support rollers designed for heavy loads;
- A robust rotating frame with a replaceable wear plate;
- A new waterproof cloth-fixing system meaning that the cloth can be replaced in a very short time;
- A high filtering surface to base area ratio.
- High level of reliability due to their robust design; indeed, a number of filters sold in the 1960s are still in operation;
- On-stream factor of over 95%;
- Excellent capacity / extraction yield ratio, due to batch filtration and a high authorised maximum vacuum level;
- Extremely energy-efficient;
- Negligible recycling of the solids recovered during cloth washing, meaning that the cake discharged from Prayon filters contains very little free water;
- Able to benefit from Prayon’s proven track record with very large filters (e.g. 30-240 filter with a surface area of 275 m²).