"So amazing!" King Kong looked at Zhao Yunxiang in shock. At this moment, he was dealing with the lemon shark.

The shark was killed by Zhao Yunxiang. He cut off the shark's back with a stone spear. The fatal weakness of any creature is in the central nerve in the neck.

After dealing with the shark, Zhao Yunxiang turned around and stared at the sea again. The blood of the lemon shark did not attract other sharks.

The shark is 17 meters long and weighs about 120 kilograms. It is enough for tribal people to eat for a few meals.

Because of the sharks, everyone in the tribe admired Zhao Yunxiang very much, especially King Kong, who was glaring at Zhao Yunxiang.

To be honest, a strong woman really can't attract his interest.

"I'll eat sharks today. I'll find a way to catch prey tomorrow, catch some wild boars or wolves to eat." Zhao Yunxiang still wanted to go deep into the mainland, one could find various plants, and the other could find minerals.

There are red copper ore now, which is generally used as wires, cables, copper tubes, etc. If weapons are forged directly, the texture of the weapon will be very soft.

After all, brass has low hardness and heavy weight.

If you want to use red copper to make weapons, you must first find tin ore and lead. With these two ores, you can greatly increase the hardness and toughness of copper.

King Kong and others are decomposing sharks. This fish is a cartilage fish that can be easily cut with a stone knife.

Jingang and others usually use bone tools. This is the first time they use stone tools. They were surprised to find that this seemingly ordinary stone piece is so easy to use.

"Sacred Alpha, what is this weapon? Why is it so easy to use?" Lin Hao glanced at the stone spear and found that the blade was extremely sharp and could easily cut meat.

"This is a spear blade made of quartz stone. The puncture force and cutting force are far from comparable to the bone tools. If you want to use it, I can teach you how to do it." Zhao Yunxiang learned that it will take some time for the production of bronze ware. You can first let the primitive people understand the stone tools, and then make bronze ware.

Of course, red copper ore also contains a small amount of limonite ore. Adding hydrogen and carbon monoxide to this ore at high temperatures can reflect iron.

Relatively speaking, it is difficult to make iron with limonite. First of all, the melting point is the melting point. The melting point of limonite is more than 1,500 degrees. It is impossible to reach this temperature with charcoal unless coal or coke is used.

Secondly, hydrogen and carbon monoxide are relatively simpler. Car exhaust, plastic combustion, methane, etc. are all carbon monoxide.

Zhao Yunxiang has a way to get carbon monoxide, and you can find it by just looking in the woods.

"What are you busy with here?" Han Xuening moved his lotus step and walked over slowly. She helped the tribe cut the shark meat. Now the pieces of shark meat are being roasted on the fire.

"Smelting..." Zhao Yunxiang wet his body with water, then came to the side of the kiln road, and used a wooden stick to fiddle out a few pieces of copper ore in the fire.

"Do you smel the metal?" Han Xuening and Zhao Yunxiang had been together for a long time and understood some industrial terms. She was very curious about what the metal that Zhao Yunxiang thought about day and night looked like.

"Yes, this is copper ore." Zhao Yunxiang fiddled out the copper ore from the kiln fire to clean up the charcoal ash, and put some dry firewood in again.

Then use a wooden stick to hold the copper ore and try to stay away from the kiln.

The temperature around the burning furnace is very high, at least 80 degrees. I feel like I am burned all over when I stayed aside.

When he came to the tree, Zhao Yunxiang gently tapped the copper ore with a stone axe. The copper ore that originally merged with the granite gradually separated. After several hours of baking, the granite showed signs of carbonization.

It turns out that as long as the temperature is high enough, the rocks will be burned into charcoal slag by flames, but the temperature of firewood burning cannot completely melt the red copper, but it only burns the red copper to a black and purple color.

"Dingding, Dingdang..."

The red copper ore was knocked out with a stone axe to perfectly separate the granite from the red copper, and a small piece of brown iron was separated. These metals were just burned and there was no sign of melting.

"The temperature is not enough. Firewood burning can produce a temperature of more than 800 degrees, the melting point of copper is 1,000 degrees, and the limonite is around 1,500 degrees..." Zhao Yunxiang was a little troubled, maybe he had to try to make a blower.

By using the wind to blow, the flame temperature can be increased and the combustion speed of firewood can be accelerated. As long as the wind power is strong enough, the temperature after the firewood burns can definitely reach 1100 degrees, and there is still a big gap between 1500 degrees.

"Blower..." Zhao Yunxiang looked at the outline of the Second Industrial Revolution and found that at present, it was impossible to make blowers at all. First, there was no metal, and secondly, there was no copper wire to make motors.

The most important thing is that there is no electricity!!

"Since it cannot be made into mechanical ones, it can be made into a power one!" Zhao Yunxiang thought for a moment and had a plan in his mind.

This method is absolutely feasible and very efficient!

"???" Han Xuening didn't know much, but just held her cheeks and looked at Zhao Yunxiang with her eyes fixedly.

"The blower can be made, but the most urgent thing is to find tin and lead. If you want to make bronze ware, you must have these two metals." Zhao Yunxiang weighed the pros and cons and said again, "Otherwise you have to find coal. As long as the coal is successfully made into coke, you can directly melt the limonite."

Compared with limonite, Zhao Yunxiang prefers the latter because steel is the bone that constitutes modern industry, and red copper is the blood vessel of modern industry. As for bronze, it is basically useless.

"Sacred Alpha, how to deal with these?" Lin Hao walked over with the shark's internal organs. He originally planned to cook them together, but Zhao Yunxiang had said before that he wanted to leave the internal organs.

"Come on, I'll teach you how to make shark fish oil." Zhao Yunxiang looked at a ball of greasy shark internal organs, some of which had a high fat content and could refine oil.

A shark was cut into several pieces and baked on the fire. A ball of shark internal organs was cut by Zhao Yunxiang. He first cut the yellow and white liver into several pieces and threw it into a wooden basin.

"Using stones can warm the shark's liver. High temperatures can evaporate the oil in the liver. The oil flows into the wooden basin. Continue to put the stones to keep the oil temperature rising. You can use hot oil to refine oil." Zhao Yunxiang said while operating.

Zhao Yunxiang used a fresh tree trunk to make a clip. He just split the trunk from it, get the thin slices of the trunk, then bend the trunk to form a arc, put it on the fire to bake and shape it, and then tie it with a vine rope to prevent the wood chips from bounceing back.

The wet trunk is very tough and can bend to a large extent and will not break.

Use a clip to grab the black stones burned in the fire, and then place them on the shark liver in the wooden basin. With a crisp "sizzling" sound, oil flows out of the shark liver.

Gradually, the oil is increasing, the shark's liver is shrinking rapidly, and the fish oil is boiling.

Continue to place the scorching stones to raise the oil temperature, and then use the other shark internal organs to squeeze out the fish oil from the internal organs.

Not long after, I got about 2 liters of shark fish oil.

"This kind of fish oil is a good thing. It can treat scalds, helps wound recovery, and has anti-inflammatory effects. It can also be used as lighting to make oil lamps, and it also has the effect of repelling mosquitoes." Zhao Yunxiang placed the wooden basin under a big tree. "Shark oil will solidify after cooling and can be stored for a long time."

At this moment, a burst of rapid shouts sounded from the tribe. Several strong men who were warding down seemed to have noticed something.

"Someone broke into the tribe!" Lin Hao hurriedly picked up the bone weapon and ran towards the tribe gate.
Chapter completed!