The mountain range in the salt mine was found to be very desolate, and even the surrounding land had few vegetation. The main reason was that the salinity here suddenly was very high, and the rainwater erosion allowed a large amount of salt to dissolve into the soil.

Su Ming led his men to conduct a simple exploration of this mineral vein. Not many of the salt mines were exposed on the ground, and more salt was buried underground. The reserves of the salt mine were amazing. Su Ming calculated that at least tens of millions of tons of salt mines were buried below.

With the mining technology of this era, it can't be dug up for hundreds of years. Even if Su Ming only sells salt, he can get a steady stream of income.

The salts in this era were divided into sea salt, mineral salt, lake salt and well salt. Among them, the highest-quality salt was lake salt. At present, the salt used by the nobles were basically lake salt. The salt produced by the Natal Salt Lake in the north was the highest-quality salt and was called green salt.

The worst quality is mineral salt, which is black and yellow in color, while sea salt is very popular in the southern waters, and the amount of well salt is very small. Now wars are taking place between the countries in the north and the south, and the green salt from the north cannot be transported to the south.

In Cana City, the price of green salt has tripled, and because of its sparse quantity, it is often bought as soon as it appears. Many nobles can only use sea salt or green salt produced in other regions instead.

If Su Ming could transport a large amount of fine salt, he would definitely make amazing profits, which would even be enough to support the construction of the territory.

After confirming that this was a large salt mine, Su Ming left and attracted a large number of people to build a salt field here. At the same time, he also conducted some investigations on the environment around the salt field and sent a large number of soldiers to drive away the surrounding wild animals.

The remaining people cut down wood and built a factory, while the other part went directly to the mine to mine. Su Ming took a hundred people to the mine to mine. These people were all stubborn men. Because there was no road and the carriage could not be passed, everyone carried a basket.

When they arrived at the salt mining site, Su Ming gave the order, one hundred people immediately took action and leveled a piece of land to build a temporary camp. After the camp was established, the workers began to dig salt mines.

Bang bang bang bang, the iron pickaxe kept hitting, and a large number of yellow-brown salt mines were smashed. One hundred workers were still very fast. In just half an hour, a hill-like rock ore was piled on the open space.

Su Ming called several workers and asked them to use iron hammers to carefully smash the salt ore into small particles, and then pour the salt ore particles into stone mills. He asked someone to use the stone mill to grind the salt ore particles into yellow-brown ore powder.

As the stone mill continued to rotate, the ore powder quickly spilled off the edge of the stone mill. Su Ming collected all the ore powder, added clean water and stirred, so that the salt was fully integrated into the water, and soon the bucket turned into a yellow-brown liquid.

If you want to wait for fine salt, the key step is to filter. This method is not difficult. Although the use of magic filtering is better and faster, and the products obtained are also better, there is no floating city, no alchemy workshop, and no wizard. This method is not popular.

Su Ming only made a filter for filtering impurities. The top layer was made of linen cloth and the bottom was filled with specially fired charcoal. The charcoal was produced by dry distillation and carbonization. To put it bluntly, it was placed in a kiln to isolate the air to calcinate.

This charcoal has strong adsorption properties and is a simplified version of activated carbon. The charcoal is broken into small particles, put in a funnel, and made into a simple filter. Fix the filter on a rack, and then slowly pour the yellow-brown solution into the filter.

After a while, a transparent solution slowly flowed out. He reached out to take some easy to taste. It tasted very salty. Su Ming nodded.

Pour the filtered brine into the pot and boil it. This process cannot be rushed. The water is slowly evaporated by continuous stirring, so that the concentration of salt gradually increases. As the water continues to evaporate, some white particles begin to slowly appear at the bottom of the pot. These white particles are salt.

After the water is about to evaporate, extinguish the fire and let the salt gradually precipitate out of the water. Although doing this wastes a little salt, the quality of the salt is better.

Soon, Su Ming got about two kilograms of white fine salt.

Let these people continue to make salt here. At the same time, Su Ming sent someone to block the area and the method of making fine salt cannot be leaked. Fortunately, the filter was made by Su Ming himself and sent a special person to protect it. The workers did not know what was inside.

Moreover, except for the poor and soldiers recruited by Su Ming, no one else came here, so there is no need to worry about leaking the secret for the time being.

In addition to making fine salt, the remaining staff began to seize the time to build workshops here. At the same time, the road from the salt mine to the town also needed to be built. Carriages were used to transport fine salt. There were bushes along the way, and there were no roads at all. One road had to be repaired as soon as possible.

Originally, Su Ming planned to slow down the construction of the territory, but the main reason was that the money was consumed too much. Now that he had fine salt, he could completely let go of his hands and feet to open up the territory and carry out large-scale immigration.

Although the salt field has not been established, the salt mine has begun to be mined. More than 100 workers dig the salt mine and then transport it to the open space near the salt mine for crushing and grinding, adding water to filter, and finally boiling salt.

After three days, the salt farm produced a total of 500 kilograms of fine salt. The original price of fine salt was high. This time, due to the war between the north and the south, the trade routes were cut off, and the price of fine salt increased several times. Anne said that the fine salt in Kana City had risen to fifty gold coins per kilogram, and even if it was such a high price, it was still priceless.

Su Ming gave away the 500 kilograms of fine salt and could be sold at a high price of 25,000 gold coins. Others were rushing to buy it. If sold to other cities in the south, the price of fine salt would be higher.

Salt is different from other luxury goods. This thing is eaten every day. If you don’t eat salt, you will feel weak and weak all over. What’s more, those nobles need to use fine salt to clean their teeth every day, and the salt consumes a lot.

According to Anne's estimate, five hundred kilograms of fine salt can't last even a week in Kana City. There are about 30,000 people in the upper city of Kana City. One person consumes about five grams of salt a day, and these people consume about five tons of salt a month.

Based on fifty gold coins per kilogram, Su Ming can earn 250,000 gold coins every month in Kana City. Even if the salt output is too much in the future, the price will be reduced to twenty gold coins, and he will still earn 100,000 gold coins per month.
Chapter completed!