24 TPD Rock Gold CIL Process Plant In Philippines

This 24 tpd rock gold CIL plant flowchart includes feeding, crushing, grinding, leaching, activated carbon adsorption, gold-loaded carbon desorption, electrolytic stage, and tailings processing.

Stage 1: Feeding and Crushing

• The raw gold stone is fed into a big hopper via an excavator; there is one chute feeder under the hopper, which can feed the material into the jaw crusher evenly. (The hopper can be made at the mine site by clients themselves according to the real situation.)

• The jaw crusher crushes rock to a smaller size. The output from the jaw crusher is transported to the next hammer crusher by belt conveyor.

• The hammer crusher crushes rock to below 20mm. The output from the hammer crusher goes to a transfer hopper via a belt conveyor; there is one electromagnetic vibration feeder under the transfer hopper as well. It’s also for buffering & feeding the material evenly.

• Transport the fine gravel to the ball mill by a conveyor.

Stage 2: Grinding System

When processing rock ore, the ball mill grinds the crushed gravel into fine powder to release the gold inside the rock. The output of the ball mill goes to a spiral classifier for classifying coarse particles and fine particles.

• The coarse particles are the underflow of the spiral classifier, which go back to the ball mill for re-grinding.
• The fine particles are the overflow of the spiral classifier, which go to the hydrocyclone for further classification into +200 mm and -200 mesh. Under 200 mesh are pumped to the thickener. Materials above 200 mesh go to the ball mill for further grinding.

Stage 3: Leaching Process

• The small fine powder from the hydrocyclone will go to a slurry tank;
• Use a slurry pump to pump the slurry into a thickener.
• Before the slurry is transported into the thickener, there is a safety screen to screen out some waste first. The underflow will go to the thickener directly.
• At the same time, flocculant is required to be added to the thickener.
• The overflow water from the thickener goes to the settling pond, then the water can be recycled after sedimentation. The underflow from the thickener will flow into a mixing tank for mixing slurry and chemicals.
• Then use a slurry pump to pump the material into the leaching tank.

Stage 4: Activated Carbon Adsorption Process

Equipped with five dual-impeller adsorption-agitation tanks containing activated carbon and a Roots blower positioned nearby to supply air to the tanks; the number and specifications of the tanks depend on the process treatment capacity.

Stage 5: Gold-loaded Carbon Desorption and Electrolytic Process

• The gold-loaded carbon is conveyed to a linear vibrating screen to remove impurities, then enters an ambient-temperature and atmospheric-pressure desorption-electrolysis system, yielding gold sludge after electrolysis.
• Subsequently, the gold sludge is dried in a drying furnace and finally smelted into gold ingots using a gold smelting furnace.

Stage 6: Tailing Process

• Tailings from the adsorption-agitation tank first enter a linear vibrating screen for carbon recovery.
• Subsequently, bleaching powder is added to the tailings slurry tank to neutralize acidic chemical substances, thereby reducing the environmental impact; the treated tailings can then be discharged to a remote location via a channel.