I would add enough water to dissolve all of the salt. Then pass it through a strainer to collect the gravel.
with fillter paper
The gravel and sand filter out smaller particles from the water
A sieve or a mesh screen can be used to separate sand from gravel. The mixture is poured onto the sieve, and the smaller particles like sand will fall through, while the larger gravel particles will remain on top.
With a fine mesh sieve.
Firstly, sift the mixture to separate the gravel from the sand and salt. Now place the sifted mixture into water. The sand will sink to the bottom and the salt will eventually dissolve. Pour this watery mixture through filter paper to catch all of the sand. If you want the salt back in solid form, simply boil the water.
with fillter paper
Sand and gravel can be separated by sifting them through a mesh, that will allow the sand to fall through, but will hold back the gravel.
The gravel and sand filter out smaller particles from the water
As salt is soluble in water, mixing salt and sand in water would result in solid sand, and salt water. When poured through a coffee filter, the sand would remain in the filter, while the salt water would flow through. After letting the water evaporate, salt would remain. You will be left with the two separated solids.
With a fine mesh sieve.
A sieve or a mesh screen can be used to separate sand from gravel. The mixture is poured onto the sieve, and the smaller particles like sand will fall through, while the larger gravel particles will remain on top.
Firstly, sift the mixture to separate the gravel from the sand and salt. Now place the sifted mixture into water. The sand will sink to the bottom and the salt will eventually dissolve. Pour this watery mixture through filter paper to catch all of the sand. If you want the salt back in solid form, simply boil the water.
A simple method is sieving.
You run the sand and gravel over different size screens depending on how many sizes you wish to sort the gravel into. In most large gravel pits, a deposit is sucked up with a pump (with water) through metal pipe up to a steel tower.Using gravity the sand,small pea gravel and larger gravels are separated. In most gravel pits the water turns green over time because of the Iron in the deposits.
You could use a magnet to separate the iron fillings from the mixture, as iron is magnetic while the other substances are not. Next, you could use water to dissolve the salt, allowing you to separate it from the sand and gravel mixture. Finally, you could use a sieve to separate the remaining sand and gravel mixture based on particle size.
One way to separate sand from gravel is by using a sieve or screen with appropriately sized mesh openings. Pour the mixture onto the sieve and shake gently to allow the smaller sand particles to fall through while retaining the larger gravel particles. Alternatively, you could use a method called sedimentation - by pouring the mixture into water, the gravel will sink while the sand floats, making it easier to separate them.
If we need to separate sand and gravel, we simply use the size of the material and a mechanical contraption to do the separating. A screen with mesh of the proper or appropriate dimensions will sieve the particles nicely. The sand will fall through the mesh piling up underneath it, and, if the screen is tilted, the gravel will bounce its way down and off the screen into a separate pile.