It turns out that those brown stones are bauxite ore, and those white stones, close up like ice crystals, so called cryolite, cryolite and bauxite ore are the raw materials for smelting aluminum, the importance of aluminum alloy is needless to say, its mechanical properties are excellent, and the density is small, so it is widely used in the manufacture of aircraft, engines and other equipment. Lin Yuan thought to himself: "It turns out that the British are here to look for aluminum ore, can I think of some way to use them skillfully?" ”

Lin Yuan in the tree was thinking about how to deal with the British, but the black bear on the ground was thinking about how to deal with the roast rabbit meat, the aroma of meat and honey drilled into the nose of the black bear one by one, the animals were afraid of fire, if it weren't for the pile of flames below, the black bear would have eaten it a long time ago.

The black bear looked at the flame from a distance, as if waiting for it to be extinguished, the British people were not bad at building the stove, the fire was well ventilated, and the flame was burning "whirring", without the slightest intention of extinguishing.

Lin Yuan cleverly used a clever plan to attract the black bear, but it didn't leave, so Lin Yuan asked Cui Rui: "When will this black bear leave?" ”

Cui Rui said: "It won't leave without eating the meat, but don't worry, although the black bear will use its claws to grab the tree trunk and climb up, it will be too laborious, as long as we don't provoke it, it won't take the initiative to attack us." ”

Lin Yuan said: "Then let's wait, I don't know when Lu Dao will wait." ”

Before Lin Yuan's words fell, a scene that surprised him appeared, the black bear actually began to dig the soil on the ground with its claws, and then piled them up, and when the pile was almost high, he hit the mound with his claws, and the clods of soil splashed over, and immediately extinguished half of the flames, and the black bear concocted the same method, and quickly extinguished the flames.

The black bear rushed to the rabbit meat, ate it in one go, and did not have a single bone left, and after the black bear had finished eating, he walked back to the jungle satisfied.

Everyone came down from the tree with palpitations, and Jefferson asked Cui Rui, "Why are there still bears?" ”

Cui Rui said: "It must be our roast rabbit meat that lured it out, we don't have to worry, let's cut some wood and build a fence, the bear will not take the initiative to break through the fence to attack us." ”

Jefferson then ordered his men to chop wood and build fences, and while they were busy, Lin Yuan secretly put a few pieces of ore into his pocket.

The timber used to build the fence should not be too fine, but they came to find ore, and the tools in their hands were all hammers and steel drills, and there was a lack of axes that could cut thick branches, and Jefferson's men had knives, and they could not cut them when they chopped, and Jefferson had to order his men to stop the felling.

Jefferson was worried that the black bear would eat a good thing here and would come back to this place in the future, so he sent people and Cui Rui down the mountain to hire villagers to build fences, Lin Yuan knew that exploring minerals was a time-consuming job, especially in a strange place to explore, and explorers needed to walk a lot of roads to find out the ore reserves in various locations and prepare for future mining.

Lin Yuan didn't have time to spend with them, so he found an excuse to go alone, he took those few pieces of ore and went to the industrial zone to find Liu Jinqiu.

Lin Yuan handed the ore to Liu Jinqiu and asked, "Does this ore have the prospect of large-scale industrial application?" ”

Liu Jinqiu said: "This is not easy to say, we need to test it." Liu Jinqiu led Lin Yuan to the test center in the industrial zone, ground the ore in the crusher, took a test tube, added several solutions to it, and gradually, the ore was dissolved.

Liu Jinqiu picked up a blue-black solution and said with a smile: "This is a chromium azurin indicator, be optimistic, witness the moment of miracle." After speaking, Liu Jinqiu added the chromium azurin indicator to the test tube, and a purple-red flocculent suddenly appeared in the test tube.

Liu Jinqiu put the test tube into an instrument and said: "We can often see that the solution shows various colors, this is because different elements absorb different colors of light to different degrees, so, applying this principle, we can analyze the content of different elements in the solution." ”

Liu Jinqiu pointed to the instrument with his hand and said, "This is the colorimetric analyzer on our Beijing ship, which is used on the Beijing ship to check the wear of bearings, and I borrowed it." After Liu Jinqiu finished speaking, he pressed the instrument a few times, and the instrument made a "buzzing" sound.

The colorimetric analyzer was connected to a small printer, and soon, the printer "squeaked" and spit out a piece of paper, Liu Jinqiu said while looking at the paper: "If you want to use modern industry to produce aluminum on a large scale, the only feasible way is cryolite and alumina molten salt electrolysis, alumina to be made from bauxite, of course, not all bauxite can produce alumina, the standard for evaluating whether bauxite can be used as a raw material for industrial production of alumina is: the mass ratio of alumina and silicon oxide in bauxite, for a while, We're going to be able to get this key data from this piece of paper. ”

After Liu Jinqiu finished speaking, he pulled the piece of paper out of the printer, looked at it and said, "There is good news and bad news, which one do you want to hear first?" ”

Lin Yuan thought helplessly: "Why did Liu Lao still play humor at this time." So Lin Yuan said, "Then let's listen to the bad news first." ”

Liu Jinqiu smiled: "The bad news is: this bauxite contains a certain amount of titanium. "Titanium is a metal material with excellent properties, which has a wide range of applications in the aerospace field, and pure titanium can also be used as the manufacture of electron tubes, which can be said to be the beginning of modern electronic technology. Lin Yuan asked, "Can this be considered bad news?" ”

Liu Jinqiu said: "Don't worry, the bad news is behind, although there is titanium here, the quantity is too small, and there is no value in industrial production." ”

Lin Yuan smiled and said, "What's the good news?" ”

Liu Jinqiu replied: "The good news is: the British desire to develop bauxite in this area is about to fail, the mass ratio of alumina and silicon oxide in these ores is only 3.2, in modern China, this quality ratio of ore can be made by alkali lime sintering method to produce alumina, but in this era to produce alumina only one kind of Bayer method, Bayer method of alumina production requires a mass ratio greater than 7, so the British will soon find that there is no value of large-scale development of bauxite here." ”

Lin Yuan frowned and said, "Is there any way to make the British believe that the mass ratio is greater than 7?" ”

Liu Jinqiu asked, "Why do you want to do this?" ”

Lin Yuan said: "The aluminum industry needs a lot of things, let's talk about the electrolysis process, it takes a lot of electricity, according to the level of the electrolytic aluminum industry in the world today, the production of one kilogram of aluminum will consume 42 kilowatt-hours of electricity, in our time, many families can not use these electricity for two months, we want to establish an aluminum industry must be extremely difficult, if the British can build the equipment for us, we will save a lot of trouble." Liu Jinqiu said: "Borrow chickens to lay eggs? That's a good idea! ”

Lin Yuan said: "When you just dissolved bauxite, what solutions were added, we prepared some solutions containing aluminum, and added to these solutions, wouldn't it be able to increase the content of aluminum?" ”

Liu Jinqiu thought for a while and said: "This method is not feasible, those solutions will react with aluminum, just like the chromium azurin indicator, which can form a purple-red complex. ”

Lin Yuan asked, "Then what else can we do?" ”

Liu Jinqiu said: "Yes, yes, but I have to go to the British laboratory to have a look." ”