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Text Chapter 1646 Underground Golden River

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    Han Peacock's current method of gold mining can only be used when looking for gold mines. Once a rich gold mine is found, this method will be too inefficient.  The gold mines mined in modern times are generally of very low grade, containing approximately 25ug/g of gold, which means that each gram of gold sand contains only 25 micrograms.  If it is pure gold sand washing, it should be that the gold washing bed is panned through a large amount of water, the light specific gravity is washed away, and the heavy gold sand is left and enriched.  Therefore, it is best to use modern mining machinery, which is also highly efficient. Of course, there are always surprises in any situation. The gold mine grade is low. That is because all the good gold mines have been excavated, but it is different in Outer Mongolia.  This is a virgin land, and gold has never been mined before. Therefore, unlike places in China where mining has been done for thousands of years, or places in the Americas where mining has been done for hundreds of years, it is possible to find rich gold mines here.  It is also for this reason that there will be more and more gold diggers here.  With the cooperation of Jin Yao and Huangshan, Han Peacock was very fast. In just a moment, he sifted out a small pile of gold sand.  "What is this for?" After stopping the screening, Han Peacock actually took out some liquid and mixed it into the screened golden sand.  "Choose gold from inside." Han Kongque said.  They didn't understand when they saw the golden demon. At this time, Usu Bayar said: "In mineral processing, this falls within the scope of gravity separation. Only the gold sand after gravity separation is mixed with mercury can the gold be selected." "Don't you understand?  ? The mercury amalgamation method is needed to extract gold from gold sand. In the past, people used to mix mercury and gold sand directly. This is to use liquid mercury and gold elements to form an alloy - gold amalgam, to screen out pure gold.  said.  "Of course, silver element also produces silver amalgam, but the majority of silver in the ore is silver sulfide, which does not produce silver amalgam, so this amalgamation method is often used in gold mining." "This reaction produces gold amalgam (alloy)  , it can also be regarded as a chemical reaction. The gold amalgam is heated and distilled to separate the mercury to obtain crude gold. " Trace gold in placer gold or other oxidized ores, in the g/ton content range, such gold mines are not mined at all.  value, so Han Peacock is constantly beneficiating minerals.  "The gold content in this tributary is slightly higher. We will look upstream from here." After selecting again and again, Han Peacock and the others harvested more and more gold sand.  "How much gold have we found now?" Huangshan wiped the water droplets from his face, feeling that gold mining was indeed not easy.  Han Peacock said with a smile: "It's a few hundred grams of coarse gold, right?" Mu Ling said at this time: "More than four hundred and eighty grams." "It weighs almost a pound!" Huangshan sighed.  "We have been here for half a month, and the weather is getting colder and colder. I don't know how many days it will snow." Jin Yao said.  Han Peacock said with a smile: "If it wasn't so hard, those Outer Mongolian warriors would have gotten rich a long time ago." "Tsk, these lazy guys, it's no wonder they can get rich." Huangshan turned his head and looked around, that Usubaya  I got the money and left a few days ago.  Usubayar didn¡¯t know how powerful Han Peacock¡¯s logistics support was, so he was afraid of encountering a snowstorm. After asking for wages from Han Peacock and the others, he followed a convoy they met by chance and went home.  Anyway, now Han Peacock and the others have a clear goal, and there is no need for Usu Bayar, who is familiar with the local environment, to guide the river course over the years, so he left as he left.  "We should not be far from the source of the golden sands." Han Peacock looked at the surrounding situation. There were not many branches of the river, which meant that they were almost able to find the source.  "There are mountains not far away. Does it come from the mountains?" Mu Ling looked at the mountain peaks to the north and asked.  Han Peacock said: "It's not surprising. There are several heavy snowfalls here every year. The snow water on the mountains melts and forms rivers on the grassland. Therefore, it is not surprising that the snow water brings golden sand." "With the United States,  The situation over there is similar. The river has eroded the rocks in the mountains and brought out the precious minerals inside." Huangshan Road.  Han Peacock laughed and said, "Don't tell me, it's really the same situation." "Then let's work harder, maybe we can find the gold mine in a few days." The golden demon gained momentum again.  Huang Shandao: "Do you think snow water corrodes the mountain all the year round, will it corrode some huge caves? In this way, we will have a place to spend the winter." "You kid is really greedy. You actually plan to come here when you encounter a gold mine.  Is it winter?" Jin Yao looked at Huang Shandao in shock.  Huangshan chuckled and said: "If we can find a pound of gold every day, no matter how cold it is, we won'tI can walk!  " "Okay, let's look forward. I found that the river water here emerges from the ground. There may be underground caves not far away, or it may be an underground river. No matter which case, look for a cave to spend the winter.  This is not a dream.  " Han Kongque said. Walking under the mountains to the north, there is indeed no large water source here. On the surrounding mountains, there are several small water veins flowing down from the ravines, which cannot form a river as big as the one below. "  There is really an underground river.  "After just a few rounds of searching, Han Peacock locked the location of the underground river. "The main thing is how do we enter the underground river?  "Jin Yao said. "It depends on the boss. As long as you search more, you will definitely be able to find the entrance.  " Huangshan Road. Han Peacock nodded and said: "You're right, maybe there is an entrance over there. I feel that the underground river flows from there.  " "Come on, let's go up and have a look.  "There is a small hill over there. I climbed up, but found nothing. "You said that snow and water corrode the rocks here all the year round. Is it easy to form cracks in low-lying places?  "At this time, Jin Yao reminded. "That's right!  How can a cave be corroded when water cannot even be retained in high places?  "Huangshan suddenly realized. Han Kongque also shook his head and smiled bitterly. He was also stupid. He didn't even think of such a thing. Sure enough, after searching for several ravines, they soon followed a creek and found it.  A crack in the ground. ¡°Can you go down?  "Huangshan looked at Han Peacock with a look of anticipation. Han Peacock said: "You can go down, there is not much water below, but you can't go down from this side, you have to go down from that side.  " "Isn't there still a small hill over there?  "Mu Ling looked at the direction pointed by Han Peacock. Han Peacock said: "The stream flows from there. It turns out that maybe there is also a low-lying place there, which was later filled with earth and rocks. Those huge pieces  There should be an entrance among the rocks. Maybe it was because of the pile of rocks that the creek changed its course, so that it would be drier on that side.  " Sure enough, several huge rocks crossed each other to support the entrance of a cave. Looking at the dark entrance of the cave, the golden demon said: "How deep is it down there?  " Han Kongque said: "It's very deep, definitely more than four hundred meters, much deeper than the entrance of the cave where water flowed in just now.  " "Then how do we get down?  Huangshan stared. Han Peacock said with a smile: "Although it is very deep, it is not a shaft. Just go down slowly and follow me."  " Han Peacock took out a plate of rope, as well as some gloves and a headlamp. With these things, it is no problem to go down. " The rope is only about a hundred meters, but Han Peacock does not only have one plate, so every time he goes down, it is a hundred meters.  rice, they took out another rope, and after using seven ropes, they descended into a flat underground cave. "Is the hill just now seven hundred meters high?  " Wiping the sand on his head, the golden demon asked. Han Peacock said: "Probably not. Did we go too deep?  " "No, we did not go straight down, but a slope. Although we climbed seven or eight hundred meters, the straight-line distance may be less than one hundred meters.  "At this time Mu Ling said. "Haha, maybe this is really the case. Come on, let's go over and take a look.  "Not far away is an underground river. At this time of year, the river water is not sufficient, which is a good time to pan for gold. "I hope there is gold sand here.  "Huangshan clasped his hands together and began to pray. At a bend in the river, they stopped. Han Peacock brought out several high-power searchlights, illuminating the surrounding area. "Is that Jinsha?  "The surroundings lit up, and the beach at the corner was very conspicuous. Especially under the light, the golden beach looked very dazzling. "Haha, it seems that we have really found a gold mine. This  This time I really made a fortune.  "Huangshan burst out laughing. Although the Golden Demon was also very excited, he had seen such a scene before, so he said: "It's rare but strange.  " "You sound like you are so well-informed.  " Huangshan said with disdain. "Of course. It turns out that in Tibetan areas, the natural gold nuggets we picked up were all Buddha statues.  "Jin Yao said. "That's artificially made, right?  "Huangshan didn't believe it at all. "If you don't believe it, ask the boss. It is definitely a natural gold nugget. At most, it just took a rest. It is definitely not cast.  "Jin Yao said. Han Peacock ignored the two of them, but looked at the gold sand seriously. The gold content of these gold sands should be high.?, at least you can get the golden sand without filtering.  "Stop talking nonsense, come here and help." Han Peacock called Jin Yao and Huangshan over, and immediately used the mercury amalgamation method to extract the coarse gold inside.  After just two simple extractions, more than ten kilograms of crude gold were obtained. At this time, the four people in this underground cave were already so happy that they couldn't even see each other.  "It's really a rich gold mine." Huangshan said stupidly.  "Don't be silly, let's take a look at the smelting." Han Peacock began to move tools outward from the chaotic space again.  If you continue to refine gold, the easiest way is to use fire alchemy. If it is rock gold, you have to crush the ore. Now it is gold sand, so this joint is naturally saved.  (To be continued.)
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