Bronze is the earliest alloy in the history of metal smelting and casting. The addition of tin or lead to pure copper (red copper) has special importance and historical significance. Compared with pure copper (red copper), bronze has high strength and low melting point (25%). For bronze smelting with tin, the melting point will drop to 800°C. The melting point of pure copper (red copper) is 1083°C). Bronze has good castability, wear resistance and stable chemical properties.
Pure copper (red copper) can actually be refined, but the melting point is extremely high, and it is not very easy to use~~
In general, it is very soft and not easy to use, you can add tin or lead~~
But as for what to add, Chen Chao said nothing, it depends on the resources on the map given by Xiaodian classmate~~
However, it is best to add tin. Tin is soft, malleable, chemically stable, corrosion-resistant, easy to melt, low friction coefficient, and tin salt is non-toxic.
Chen Chao inquired (crossed out) and thought about the addition ratio, which was divided into six types.
1. Zhong and Ding: The ratio of copper to tin is six to one, that is, copper accounts for 85.71% and tin accounts for 14.29%.
2. Axe: The ratio of copper to tin is five to one, that is, copper accounts for 83.33% and tin accounts for 16.67%.
3. Halberd: The ratio of copper to tin is four to one, that is, copper accounts for 80% and tin accounts for 20%.
4. Big blade: The ratio of copper to tin is three to one, that is, copper accounts for 75% and tin accounts for 25%.
5. Cut and kill the arrow: The ratio of copper to tin is five to two, that is, copper accounts for 71.43% and tin accounts for 28.57%.
6. The ratio of Jiansui, copper and tin is one to one, that is, 50% each.
(Note: The tin component in bronze accounts for 17% to 20%, which is the toughest.)
Moreover, tin and copper are often associated. Of course, there is a certain probability that lead is associated with them, and silver is often associated with them.
But for things like lead, if you don't add it, you can't add it. It's still not good for the human body because it has no protection.
So in addition to pure copper (red copper), Chen Chao also needs to find tin~~
Because he just took a look, he didn't get a 60-point start-that is, the copper-tin associated mine.
Not only is it not a 60-minute start, the two distances are still far away, and the straight-line distance is about 200 kilometers. It is estimated that the score will have to drop again.
Chen Chao inquired (crossed out) and looked at the search characteristics of tin mines.
The main features are: 1. Granite area or hidden granite area.
2. Marble, horn rock, skarn, froze, and gallate area.
3. Ultrabasic rocks and gabbro in some tin-rich areas within and near the contact zone of rhyolite, granite, granitic porphyry;
......
In general, these characteristics...
He doesn't know a lot...
But fortunately, there was a location map given by a classmate Xiaodian, so he decided to take people to the mountain after he got to the place. If he had a specific location, it should be much easier to find it.
Moreover, the characteristics of cassiterite are relatively obvious. Natural cassiterite is gray-black in color, shiny, and very easy to distinguish.
The most important pure copper (red copper) can be found through malachite.
Because there are often some purple-red natural copper (also called red copper) with a purity of more than 99% on the surface of the copper deposit. It is soft and malleable, and can be processed into tools and daily necessities with a little beating.
A kind of green malachite is also common in the oxidation zone above the copper mine.
Malachite is named for its color like the feathers of peacocks. Generally speaking, it is very beautiful and easy to distinguish.
It is mostly block, stalactite, crust and concentric strips. The green pigment made of malachite is called stone green, or Shilu. The alias of malachite is "copper green", and it is also a sign of prospecting.
When Chen Chao checked the information (crossed out) and thought, he also found an option to start with full marks, and that was a place called Tonglu Mountain.
That place is amazing, it is really a comprehensive deposit of copper, iron, gold, silver, and cobalt.
Of course, he should not think about it now, because this place is far away from him.
You can only mark it first, and then put this cute little boy into the arms of the boss of the system~~
The copper ore mined from the copper ore is processed into a copper concentrate or copper ore sand with higher copper-bearing grade.
Copper concentrate needs to be refined through smelting to become refined copper and copper products. The earliest source of copper ore was malachite.
So, as long as you find which mountain has malachite, it is estimated that the copper mine Chen Chao wants is below.
Thinking of this, Chen Chao sighed softly.
In this world, you must first be a survival expert, and then botany, biology, geology, etc. are all experts!
It is estimated that there will be war behind, and it must be a military man...
It can't be the kind that just talks about not practicing on paper...
Even law, psychology, sociology, linguistics, literature, mathematics, etc. are not counted yet...
Even the business area, I have to think about it...
Damn it, I'm Chen Chao, just a little bit of a little bit of money, Cai Cai Cai Cai Cai chicken...
In order to cross the front are 300 poems of the Tang Dynasty, and I read the selected works of Marxism and Grandpa Mao! !
What I want is that my teammates don’t hang up and have 300 bowls of rice! !
What I want is for me to choose from the fragrant chariot, the beauty hugs me full of arms, the moon goes to the heavenly palace, and the fairy takes my pity! !
I didn't come here to look for mines! !
what? You said this mine belongs to my family?
Find, find now, I can find every day! !
Look for it year after year, month after month, look for it when you wake up, look for it when you sleep! !
It’s a trivial thing to find the wasteland and old age~~
Lao Tzu can not only find, but also dig. No, there are people who listened to me on the small one hundred behind him! ! ~~
Oh, there are pigs and sheep, they can also carry something.
Although it is not much, it can be moved. ~~
They can also be on when necessary! !
Look at this system leader using the most primitive tools to develop the best animal power handling tools! (Bragging)
Move as much as you want!
When Chen Chao led the army for a few days, stepped across several rivers, through several jungles, and climbed over several peaks.
He could already perceive in his consciousness when he walked near the designated pure copper (red copper) mine location on the map.
He looked up and found that his vision was not good.
Surrounded by the mountains, looking up, only the bare branches could be seen, most of the blood was melted, and a few white clouds drifting across the blue sky.
So Chen Chao asked everyone to wait at the bottom of the mountain. He brought Qu and Li Nong first, and found a suitable mountain to climb up first.
When he stood on the highest mountain and looked up, Chen Chao was shocked by the few mountains in front of him.
It can't be said that they are exactly the same in full length. There is a difference between tall, short, fat and thin.
But everything on the mountain looks the same?
At this moment, he wanted to interview these mountains.
