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Open-pan salt making is a method of salt production wherein salt is extracted from brine using open pans. Virtually all European domestic salt is obtained by solution-mining of underground salt formations, although some is still obtained by the solar evaporation of seawater.
A salt evaporation pond is a shallow artificial salt pan designed to extract salts from sea water or other brines. The salt pans are shallow and expansive, allowing sunlight to penetrate and reach the seawater. Natural salt pans are formed through geologic processes, where evaporating water leaves behind salt deposits.
In 1969, the Peruvian state assumed control of salt extraction and commercialization, but in 1980, local communities regained control with the establishment of Marasal S.A., owned by residents of Maras and Pichingoto. [4] Today, the company manages salt administration and commercialization, with around 400 families owning salt wells in the area.
One of the traditional methods of salt production in more temperate climates is using open pans. [26] In open-pan production, salt brine is heated in large, shallow open pans. The earliest examples of this date back to prehistoric times and the pans were made of either a type of ceramic called briquetage, or lead. Later examples were made from ...
Salt making is mentioned in the Domesday Book, and by the 13th century there were approximately 100 "wich houses" packed around the town's two brine pits. [8] By 1908 there were nine industrial scale salt manufacturers in the town, with a number of open pan salt works close to the Trent and Mersey Canal.
The technique was adapted from the sugar industry, and had first been applied to salt extraction in 1887 in Silver Springs, New York. [6] First tried commercially in the UK as early as 1901, [ 14 ] several British manufacturers started up vacuum evaporator plants using a small Mirlees-type evaporator in parallel with their open-pan operations ...
Around 400 BC, the townsfolk, who had previously used pickaxes and shovels, began open pan salt making. During the first millennium BC, Celtic communities grew rich trading salt and salted meat to Ancient Greece and Ancient Rome in exchange for wine and other luxuries. [11] The word salary comes from the Latin word for salt.
The Grainer evaporation process is a method of producing salt. [1] This method uses shallow open pans with steam-heated immersion coils to evaporate the brine into salt. Sometimes it is paired with a partial-vacuum, to speed evaporation.