Gossip about "salt"

Have you ever been to the saltworks? How did the salt come from? What are the forms of salt? Do you know that?/You know what?

During the holiday, I was so bored that I wanted to find someone to play in a less interesting place. The scenic spots in the city and the surrounding parks are not fresh and have no interest in playing. So I had to turn on the TV and watch programs like "Home Far away" and imagine playing with the host. On the 3rd, after reading the article "Delicious" in Changsha, I made up my mind to eat stinky tofu when I went to Changsha in the future. When I was slouching on the sofa, I suddenly heard "Ding Dong" (WeChat message prompt). Actually, I hate online voting. Out of human kindness, I clicked the link. It was only when I opened it that this activity was the "Salt Life Mobile Photography Competition" jointly organized by Tianjin Daily and Tianjin Luchang Salt Field. My eyes lit up and my heart moved. Yes, I can go for a walk in the saltworks.

On the morning of the 4th, it was cloudy with rain forecast. Lao Zhang and I discussed a decisive trip, drove through Luchang Salt Field and drove for an hour to Tanggu Salt Field. The salt field is deserted, and there is no row of salt ponds in sight. Salt ponds and salt piles are covered with black plastic sheets. When we were wondering whether the covered salt was salt or not, we met two tooling masters. Curiosity drove me to open the interview mode. "Master, hello! Is there any salt in this pool? Why is it covered? " "It is salt water. I was afraid the rain would get salty, so I covered it. " He pointed to the black pile by the pool and said, "This is salt covered with black plastic."

Master opened the plastic in the corner of the pond and showed us the brine in the pond. The salt and water in the pond are obviously separated. He said it was brine with a density of 20, and the ponds with densities of 20, 15, 10 and 5 were sorted in turn. Seawater is introduced into a pond with a density of 5 through a special ditch. After reaching the brine concentration through sun exposure, it will be introduced into the corresponding salt pond, and the salt pond will be shoveled three times every two years. I can't help but sigh: salt making is really hard!

Unfortunately, I didn't see the true face of salt this time, so I'll come back on a sunny day. Knowing the salt production efficiency of Tanggu saltworks makes me worry about whether salt will become a tight commodity. I'm really worried!

When I visited the saltworks, I suddenly became interested in salt. I watched two episodes of the documentary Salt of Life today. Let me introduce some knowledge about salt to you.

Salt exists in solid, crystal and liquid.

The representative of solid salt is the sedimentary salt after volcanic eruption in Ethiopia Plateau. Direct mining is as convenient as mining stones on the mountain.

Salt in Salzburg, Austria, is not so easy to mine. The salt here is hidden 40 meters underground. Like our coal mine, it needs cable car mining. The salt buried in the stratum in the solid state of this ore is called rock salt. The original miners of Dunnburg Salt Mine in Austria were Celts, and they were collected in the Iron Age or earlier Stone Age, which shows how long the history of salt mining is.

Wensu Ancient Salt Mountain in southern Xinjiang is the only rock mine in China. Local herders often go to Yanshan Mountain to collect stones for sheep to lick and absorb salt and rare metals from the stones, which not only keeps out the cold, but also makes them stronger.

The mining of solid salt is underground, and the mining of liquid salt is also quite interesting.

Italian Cervia salt crystallizes on the lake. Because the crystal is very thin, it will be melted by dew every day. Therefore, this crystalline salt should be fished out of the lake with tools before dew every day and can be sold directly in bags.

The exploitation of well salt requires certain technology. In Zigong, southwest of China, there used to be tens of thousands of salt wells, each of which was equipped with a crown block. The crown block of Jingyan is 39 stories high, and the brine thousands of meters underground is pumped through a small wellhead. This well salt mining technology is unique in the world, and the pumped black brine will produce shiny salt after boiling. Zigong, as a salt capital with a history of hundreds of years, represents the wisdom of mining well salt.

The Lancang River basin in the southwest of Zigong is a salt drying field in Mangkang, Tibet, where there are more than 50 salt springs. Mangkang people use electric pumps (used to be artificial brine) to pump the brine from the salt spring into the salt pond, and then pump it to the salt field when the water in the salt pond reaches a certain concentration. (This method is similar to Tanggu Salt Field. Due to the different degrees of sun exposure, the salt here presents various States, from white salt to red salt. Every April, Mangkang people can get a pink salt called peach blossom salt, which is also the best quality salt in Mangkang.

Our Chaka Salt Lake in Qinghai is the highest-end, known as the mirror of the sky. It is not only a beautiful tourist attraction, but also a solid and liquid salt lake. Crystalline salt floats on the lake surface, while solid salt is deposited on the bottom of the lake. Lake salt reserves are enough for the people of the whole country to eat for 70 years.

Salt, which we seem to get very easily now, was a scarce resource in ancient times. In ancient Rome, people's poverty and wealth were not measured by how much gold they had, but by how much salt they had. Salt is called platinum. Our country nationalized the salt industry from the era of Emperor Wu of the Han Dynasty, and it was the control of the salt industry by Emperor Wu of the Han Dynasty that strengthened the national strength and broadened the territory.

The earth we live in is a planet of water and salt. No matter what form salt exists, smart people will mine it.

According to statistics, China has the largest per capita salt consumption in the world, and the high salt consumption may also be the reason for the high prevalence of hypertension in China, which has to be paid attention to.