How do you separate sand salt and grit from rock salt?

Answer 1

Rock salt is mined as a solid in salt mines. it does not need to be separated.

Answer 2

It could be argued that both sea salt and rock salt are the same thing. Both are mixtures of salts (primarily sodium chloride) and other minerals that were dissolved in the water that was the source of the salt. Let's look at both and see. Sea salt is generally the term that we apply to salt that originates from the oceans, and it is a product recovered through the evaporation of sea water. That is done in the present. We set aside large evaporation ponds, let in sea water, isolate the ponds, and let evaporation take its course. We may pump the brine to other ponds to "finish" the evaporation process. It's environmentally powered production with the sun supplying the energy and the atmosphere helping out - sweet. Oh, and the crystals of salt are generally pretty small, at least compared to the larger ones formed in rock salt concentrations. Rock salt, a term usually applied to the mineral halite, is usually mined from deposits. But how did it get there in the first place? How did the rock salt concentrate? How did these deposits form? They're gifts from the past. For the most part, halite deposits were laid down through the process of sedimentation and dehydration of areas of salty water that had been isolated and then dried up. Geologic changes including shifts, uplift and such, left bodies of water "cut off" from other open water. They later gave their water up and left the deposits. And this happened long in the past. We can map and assay the deposits to consider mining options. Certainly the salt resulting from recovery activities in either case will contain other salts (other than sodium chloride) and some traces of other minerals as well. Sea salt from evaporation ponds will have "extras" that reflect on what was dissolved in the sea water that initially filled the pools. And the nature of the water that began the process that lead to the deposition of hallite concentrations will temper the profile of rock salt, as will leaching (either into or out of) the deposit throughout time as the deposit "sits" awating the arrival of our mining equipment. In either case, that is, in the case of both the sea salt and the rock salt, the root source of the salt is water that had some salt dissolved in it. Separating the two is effectively like separating sea salt from sea salt. It might be possible to sieve the mixture and take out the larger crystals and call that rock salt. But we can "force" sea water to create larger crystals by applying a bit of physical chemistry. Separating sea salt from rock salt? That's a good one. Links are provided below to directly related Wikipedia posts.

Answer 3

Try to crush the solids a little. Stir the mixture until the salt dissolves into the water. Pour the mixture through filter paper to separate the rock from the salt water. Then boil the water to evaporate it, leaving the salt behind.

Answer 4

Add to water, the salt will dissolve and the rocks won't. Then you simply filter the water and remove the rocks. The remaining solution can be heated to evapourate the water, leaving the salt behind.

Answer 5

Table salt is refined rock salt; shortly the process is:

- grinding of rock salt

- dissolving in water

- filtering

- purification by repeated processes of crystallization/recrystallization

- adding iodine (as potassium iodate or iodide) and an anticaking agent

Some sources of rock salt are practically pure and doesn't need to be refined.

Answer 6

The rock salt is dissolved in water, filtered, purified by repeated processes of crystallization/recrystallization.

Answer 7

you basically need to add water and then decant it (pour the liquid through a filter funnel) and evaporate the water from the salt