Feeding->washing -> primary sieving -> gravity separation to remove heavy minerals -> refining process to remove magnetic minerals -> Sieving out requested size silica sand -> drying -> packing
1. Silica sand Feeding
Use vibration feeding machine, feeding hopper, electromagnetic vibration feeder, belt feeder, wheel loader or excavator feed directly. It depends on process capacity and raw material conditions to choose which feeding machine.
2. Clean clay
Washing clean the clay, kaolin clay and mud in raw material, most popular silica sand washing machine are trommel scrubber, log washer, spiral washer, attrition scrubber, etc. Wash machine for sale.
The silica sand washing attrition scrubber and spiral classifier washing machine are especially good washing effect for small size silica sand -3 mm. If bigger size, can consider using trommel scrubber and log washer to wash silica sand.
3. Primary Sieving to remove coarse waste sand
After washing clean the clay, then need to sieve out some bigger waste sand, the under-screen sand will go to next gravity separation machine. This sieving process can use normal vibration screen or silica sand high-frequency vibration screen. Vibrating screen details
4. Gravity separation to remove heavy minerals
It is for primary silica sand gravity separation to remove heavy minerals, such as ilmenite, hematite, iron, etc, the most common use silica sand separation machine is shaking table, spiral chute separator. It depends on the processing capacity to choose which gravity separation machine.
If a big capacity plant, usually uses spiral chute separator with bigger capacity. If a small capacity plant, usually uses shaking table to separate out silica sand.
5. Silica sand refining process removes magnetic minerals
After silica sand gravity separation, there will still some percentage magnetic minerals in silica sand, so need to remove it by magnetic separator, different magnetic minerals, will use different gauss magnetic separator, for removing iron, need 1000 gauss, for removing ilmenite and hematite, need 8000-9000 gauss. Different usage of silica sand, will request different percentages of magnetic minerals remaining in the final silica sand product.
6. Sieving out requested size silica sand
After removing magnetic minerals, will need to sieve out requested size silica sand, usually use the high frequency vibration screen, with PU screen, screen mesh size can be customized.
After sieving out final silica sand, then drying the sand by drying mahcine.
After drying the sand, use packing machine to pack final silica sand product ,then can sale.