How is salt made How is salt made?

China's salt resources are very abundant, the salt-producing areas are all over the country, and the output is also very large, which can not only fully meet the needs of the domestic people's life, but also organize exports. The salt produced in China mainly includes sea salt, well salt, pool salt, mineral salt, etc.

According to the different degrees of processing, table salt can be divided into raw salt (coarse salt), washing salt, and processed salt (refined salt). In addition to sodium chloride, it also contains impurities such as potassium chloride, magnesium chloride, calcium sulfate, sodium sulfate and a certain amount of water, so it has a bitter taste; Washing salt is a product that is washed with saturated brine from raw salt (mainly sea salt); The raw salt is dissolved to make a saturated solution, and after the impurity removal treatment, it is evaporated, so that the edible salt prepared is the reconstituted salt, the impurities of the reconstituted salt are few, the quality is higher, the grains are powdery, the color is white, and it is mostly used for cooking in the catering industry; In addition, there are artificially iodized reconstituted salts for dietary use in some iodine-deficient places.

It is coarse salt obtained from the drying of seawater, and then processed into edible salt after a series of processing.

It is made by drying (drying) salty saltwater, including lake water and seawater from saltwater lakes.

It is said to be a seaside salt farm, which is refined by drying seawater, which is our common sea salt. In the later stage, according to the different uses, various additives will be added to become salts with different uses. ^_

The salty sea water evaporates from the sun and turns into salt.

Seawater or brine well water is dried.

Salt production process: Industrially, salt is dried by seawater or boiled salt with well water or salt lake water to precipitate salt crystals. The table salt prepared in this way contains more impurities, which is called coarse salt.

Coarse salt can be dissolved, precipitated, filtered, and evaporated to obtain refined salt. Modern salt is used in the manufacture of salt"Vacuum salt production"Technology, pure brine is injected into the evaporation tank, and the high-temperature steam heats the brine through heat exchange, so that the water in the brine evaporates and the salt crystallizes. Scientists also used the principle of reducing the boiling point of the liquid under low atmospheric pressure conditions, and adopted the method of reducing the atmospheric pressure in the evaporation tank to reduce the consumption of heat energy and make the salt crystallize as soon as possible.

Here it is"Vacuum salt production"Technology. Salt production is continuous production, and the salt that has just been produced is still a salt syrup. The excess brine should be shaken off by centrifugal glue and returned to the evaporation tank for use.

The dehydrated salt is still wet salt and is dried with dry, hot compressed air. The dried salt is the salt used in industrial production. If it is used for food, there must be a key process-"Iodization"。

If a person is deficient in iodine, he or she will develop "Iodine Deficiency Disorder (IDD).""Big neck disease, intellectual impairment or something. The iodized salt is packaged, transported, and then enters thousands of households and people's lives.

Preparation method of table salt: In industry, salt is dried in seawater or boiled salt in well water or salt lake water to precipitate salt crystals. The table salt prepared in this way contains more impurities, which is called coarse salt. Coarse salt can be dissolved, precipitated, filtered, and evaporated to obtain refined salt.

Generally speaking, the production of salt is achieved through extraction technology, some are extracted directly from seawater, but if it is high-quality salt, it should generally be extracted and processed from salt mines, because the quality of sea salt is still poor.

How do we make it? In fact, we have a similar salt farm when we are in a coastal city, and then we bring in seawater, use evaporation research to make it, and then filter and wash it.

In the heyday of the 60s, there were more than 2,400 salt workers and field workers, which can almost be said to be the most important working population in Budai. Salt is an important product of the cloth bag, the salt pans account for more than half of its total area, the crystal continuous salt mountains, like a white pyramid, silently listed in the middle of the salt pans, and all have built salt transportation railways, which shows the long history of this "salt town".

Three-stage salt-drying style.

The salt pan is divided into three parts: water area (large evaporation pond), Pingzi (small evaporation pond), and Chenggezai (crystallization pond). The water area is divided into five sections and ten grids, Pingzi is divided into three sections and six grids, and Chenggezi is divided into three sections and 24 grids.

The sea water turns white salt.

The salt workers introduced about 3 degrees (Baume concentration) of seawater into the water area, increased the concentration by evaporation, and then pushed forward one section at a time, about 10 degrees after five stages, and pumped to Ping Tsai (which was higher than the water area) by a water wheel (i.e. a keel car, later changed to a windmill, and now changed to a pumping machine) to continue evaporation.

When the concentration of the water in Ping Tsai is increased to 25 degrees, it is then introduced into Cheng Ge Tsai to crystallize into salt. From the introduction of seawater to crystallization into salt, its time course is not exactly the same, depending on the weather, the weather is good and fast, the weather is bad and slow, such as sudden rain, the previous efforts may be in vain, so in the season of unstable weather, it is difficult to have a good harvest, it is not an exaggeration to say that the salt workers are to watch the sky to eat, and it is not difficult to imagine that their life is hard.

5.How is salt made? What do you think of the formation process of salt?

Sea salt can be extracted, as well as well salt, and so on.

The general methods used are mainly moisture absorption, brine, crystallization, salt collection and salt washing.

The coarse salt obtained after evaporation is dissolved, precipitated, filtered, evaporated to obtain refined salt, and finally other elements are added according to the needs of the actual situation.

1. Absorb the tide. Nachao is actually the process of extracting raw materials for the production of raw salt. Seawater is the raw material for the production of salt, and in order to ensure the normal progress of production, we must do everything possible to ensure the quality of the raw materials.

2. Halogen. The brine concentration is gradually increased, and finally it is concentrated into saturated brine.

3. Crystallization. When the salt concentration reaches saturation, it can be precipitated in crystal form.

4. Collect salt. It is to put away the grown salt manually or mechanically.

The production process of salt is: drying salt with seawater or boiling salt with well water and salt lake water, so that the salt crystals can be precipitated, and coarse salt can be obtained by dissolving, precipitating, filtering, evaporating and other processes. For the sake of people's health, the basic food consumed by Chinese residents is iodized salt.

Table salt** is different from sea salt, lake salt, soil salt, well salt, mineral salt, etc., and the main ingredient is sodium chloride. According to the relevant regulations of our country, the sodium chloride content of well salt and mineral salt shall not be less than 95%.

Table salt generally also contains a certain amount of impurities, such as barium salts, chloride, magnesium, lead, arsenic, zinc, sulfate, etc.

In the early days, the production of salt was directly installed on the stove, set up an iron pot, and boiled over a fire, which was not only time-consuming, but also consumed fuel, and the output was relatively low.

The process of making salt includes mining, evaporation, etc.

Mine salt is salt that is mined from the ground and is mined by convection in most countries. This method takes advantage of the fact that salt dissolves in water, and first drills a well deep into the rock formation. Then the next two layers of casing, the outer layer of casing is fixed with cement, and then water is injected into the well from the inner layer of pipe.

When the rock formation is dissolved, another pipe is used to flush up the brine with the dissolved salt, and then the impurities in the brine are removed first.

Then vacuum evaporation or hot pressure evaporation is used to evaporate the brine and precipitate salts. This method has a high degree of mechanization and low cost, so it is the first choice in many countries in the modern era of mechanization. The brine concentration will increase until it becomes saturated brine, and then with long-term evaporation, the salt will precipitate in the form of crystals.

The wonderful use of salt: 1. Coarse salt has the effect of sweating, it can discharge waste and excess water from the body, promote the metabolism of the body, and also soften dirt, replenish salt and minerals.

2. If you want to remove the oil stain on the blanket, wash it with a solution of 1 part salt and 4 parts alcohol, and rub it vigorously when cleaning to remove the oil stain without hurting the blanket.

3. When rubber-soled canvas shoes have a smell, sprinkle a little salt on the shoes to absorb sweat and deodorize. The newly bought styrofoam shoes are soaked in salt water for half a day before wearing, which is not easy to crack and durable.

4. The straw hat is old, and washing it with salt water can make it look new.

5. The newly bought toothbrush is soaked in hot salt water for about half an hour and taken out, which can make the toothbrush durable. <>