Q:

How is table salt made?

A:

Quick Answer

According to The Salt Institute, the majority of table salt is made by solution mining of salt beds, then processing the salt and adding anti-clumping additives and iodine. Solution mining is accomplished by creating wells over salt beds and injecting fresh water so that the salt is dissolved. The resulting solution is extracted and moved to an evaporation and processing plant.

Continue Reading

Full Answer

Salt can be produced in several other ways, such as deep-shaft mining or solar evaporation. Deep-shaft mining is similar to other mineral mining and extracts salt from old underground sea beds. Salt extracted via deep-shaft mining is mostly used as rock salt. Solar evaporation consists of evaporating shallow pools of salt water, leaving only the salt behind. This can be done in areas with abundant sun coverage and low rainfall. As of 2011, the leading salt producers in the world are China, U.S., Germany, India and Australia.

Iodine is an essential nutrient to the human body, and major health problems arise without it. Iodine has been added to salt since 1924. The Salt Institute states that this has increased the IQ of U.S. citizens by preventing iodine deficiency, the leading cause of avertable mental retardation globally. Table salt usually contains 97 to 99 percent sodium chloride, the rest being additives and iodine. The World Health Organization recommends that people limit salt consumption to 0.17 ounces per day.

Learn more about Manufacturing

Related Questions

  • Q:

    What are balloons made of?

    A:

    The majority of balloons manufactured are made from one of two common materials: latex and foil. Latex is a form of liquid rubber derived from the sap of rubber trees. Manufacturers use organic and inorganic pigment to create the colors of latex balloons.

    Full Answer >
    Filed Under:
  • Q:

    Are Multiplaz welder reviews typically positive?

    A:

    The majority of Multiplaz-3500 welder reviews are positive as of 2015, with very few negative comments. Reviewers note that the lightweight device takes the place of multiple tools without taking up much space. The only drawback to the Multiplaz-3500 welder, according to an Amazon.com reviewer, is the price of $2,000.

    Full Answer >
    Filed Under:
  • Q:

    What is a span table used for in the lumber industry?

    A:

    Span tables are used to determine the dimensions and wood class necessary for load-bearing wooden parts, such as beams, studs, joists and rafters, in a construction. Span tables are published by lumber producers so that their customers can check what loads a given dimension and class of lumber can support without either breaking or bending too much.

    Full Answer >
    Filed Under:
  • Q:

    Where does road salt come from ?

    A:

    Road salt is mined. It originated from the evaporation of ancient, long extinct seas. This evaporation created large salt deposits underground. Portions of these deposits are blasted using explosives and then the salt is shoveled into trucks for transporting it to a machine that crushes it into usable pieces.

    Full Answer >
    Filed Under:

Explore