Without salt the process of digestion and a metabolism is impossible, the taste of many dishes without salt seems incomplete. So the occupation as conservation of crunchy cucumbers and spicy tomatoes loved by our grandmothers, is impossible without salt too. Fortunately deficiency salt in the world isn't expected!
Instruction
1. Earlier salt was extracted in the pool or sadochny way, now it is used too, but is completely mechanized. On the seashore arrange in the fall a small reservoir which through a ditch is filled with water. After a while on a bottom stones, sand and clay settle, and start up water in the second reservoir. There comes the turn of the third pool in the spring, water with high content of salt, than in initial party comes to it. During this time water managed to evaporate fairly. By the end of summer when almost all water evaporates, on a surface the salt layer appears. This salt was raked up manually earlier and formed of it heaps 10-15 meters high, then salt which some time was washed out a rain, loaded on vehicles.
2. Fortunately this slave manual work was succeeded by mechanization. Though in some countries, for example in Indonesia and India, manual salt-making process still remained. In the twenties in the Soviet Union began to use salt combines, excavators and coal cutters that considerably increased volumes of the extracted salt. In the Astrakhan region on border with Kazakhstan the lake Baskunchak, its square of 106 square kilometers is located, it and is covered in the winter with a layer of 30% of a brine in the early spring - brines.
3. Now on this lake salt extract by means of the combine - an hour about 300 tons! Earlier, weight equivalent to this was extracted by 200 lomshchik, and 120 loaders loaded it on 300 camel vehicles. The same salt-mining combine does both initial washing, and crushing of large pieces. Then salt arrives on mills.
4. From the depths of the earth salt is extracted in the mine way. For millions of years salt turned here into a stone monolith. But temperature and high pressure can change structure of salt, make it pliable - it extends when heating stronger than the breeds surrounding it and begins the movement upward. Some salt mountains come to the Earth's surface, for example Hodge-Mumyn 900 meters high, and the lake Baskunchak was located at top of one of such salt domes. By means of coal cutters or explosive works from the massif of salt break away blocks which here (in the mine) are split up and rise outside.
5. The our acquaintance - food Extra salt is received in the vacuum way at the solevarochny plants. Through wells in the thickness of salt lying underground fill in fresh water. The received strong brine is extorted pumps and cleaned, then place in confinement with the lowered pressure - a vacuum. With a pressure below atmospheric the brine boils at lower temperature and actively evaporates water. Salt in the form of small kristallik drops out in a deposit, and the centrifuge it is separated from the remained liquid. Here and Extra salt of a high milling turns out.