PickyPlans
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Here is a design I created for a customer to filter cyanide leaching solutions from ores. It achieves a filtration rate of about 1–1.5 liters per minute using just a large piece of filter paper. While I no longer have the unit, I can guide you in building one if needed. It’s also effective for filtering metal hydroxide waste.
The main body is made from a 35 cm diameter steel pipe, internally coated with polyamide paint for protection. One end of the pipe is welded to a flange, which is secured with a hydraulic jack. I had the flange lid custom-cut and machined with circular grooves (2 mm deep and 6 mm wide) to collect filtrate from the entire surface area of the filter paper. The filtrate is then directed to a collection side, where a simple welded tap allows for easy drainage.
The system operates using compressed air, which is directed to the top of the chamber. This pressure forces the dirty solution through the filter paper, allowing the filtrate to pass through while the solid residues accumulate as a filter cake. Once filtration is complete, the solids can be easily removed.
The main body is made from a 35 cm diameter steel pipe, internally coated with polyamide paint for protection. One end of the pipe is welded to a flange, which is secured with a hydraulic jack. I had the flange lid custom-cut and machined with circular grooves (2 mm deep and 6 mm wide) to collect filtrate from the entire surface area of the filter paper. The filtrate is then directed to a collection side, where a simple welded tap allows for easy drainage.
The system operates using compressed air, which is directed to the top of the chamber. This pressure forces the dirty solution through the filter paper, allowing the filtrate to pass through while the solid residues accumulate as a filter cake. Once filtration is complete, the solids can be easily removed.
