Hiding his body and breath, Zhi Lingqi quietly sneaked into the valley, it stands to reason that with the strength of Zhi Lingqi now, he doesn't need to be so cautious at this time, but this time he returned to the cave under the valley, not to play and experience, not afraid of disturbing.

Now sneaking back here, but in order to secretly collect the fire crystal sand, what is the fire crystal sand? It is the best refining material that is rare in thousands of years, once the news leaks, even if there are no humans here, even demon beasts will rush up in groups.

Although with his current strength, he is indeed not afraid of the strongest demon beasts in this green valley, but once all the demon beasts rise up and attack him, it will also be a situation that Zhi Lingqi will not dare to face at all.

At that time, not only will he not be able to collect the fire crystal sand, but it is also entirely possible that he will be regarded as an enemy by the beasts, and he will be expelled from the area where the beasts are located by a group of attacks and will find nothing.

After carefully looking at the situation around the valley and making sure that there were no demon beasts and humans, until Lingqi came to the lowest part of the valley, when he came to the outside of the entrance of the underground cave, after making sure that there was no abnormal situation around, he carefully used his hands to remove the vine plants covering the cave entrance on the slope, and took the Heavenly Eye Sense to explore the cave.

He was still sure of his ability to Tianyan, and after exploring the situation in the cave in detail and confirming that everything in the cave was still the same, Lingqi was completely relieved, and then he still used the method of entering the cave with both feet first, and drilled into the cave.

When the head is about to enter the hole, put your hands out of the hole, gently pull the vines that were previously blocked by yourself, completely reset the vines to cover the hole, and then drill through the narrow hole four or five meters deep and enter the spacious cave inside.

After entering the cave, Zhi Lingqi couldn't hold back his excitement, immediately took out his chiseling axe, walked to the cave wall, and casually split a small piece of fire crystal sand rock, mashing it into particles for observation and detection.

Through observation, it was found that the content of fire crystal sand in the rock was very small, and the volume of fire crystal sand was also very small, so small that it could not be found with ordinary divine sense.

Although the content of fire crystal sand in the rock is very small, the distribution is quite uniform, and it is basically integrated with the rock, and there is a feeling that you have me, I have you and you are inseparable from each other.

The Reiq uses the Axe to mash the rock particles again, and infuses the Axe with psionic energy to grind the particles into powder. After the Spirit Qi probed again, he found that even if he used his Celestial Vision, he could not separate the fire crystal sand from the rock powder.

Of course, with the extremely small size of the fire crystal sand, it is even more impossible to collect it with both hands, and if it is collected together with the rock powder, it will lose the meaning of collecting because there are too many impurities to integrate into the weapon.

Originally, Zhi Lingqi was very convinced of his ability to perceive the Heavenly Eye, but now he was powerless, so he thought of a method of smelting at high temperature, he wanted to use the difference in the melting points of the two substances to melt and separate, and then collect them.

It is conceivable that since the fire crystal sand is a derivative of the fire source spirit in the chaos source spirit, its melting point must be much higher than the melting point of the rock here, and it should be a practical method to melt and separate it by high-temperature smelting.

Zhi Lingqi was about to take out the alchemy furnace, and suddenly thought that it would definitely not be possible to use the alchemy furnace to smelt, as far as the high temperature resistance of the alchemy furnace was concerned, it would definitely not meet the requirements of melting the rock powder, and the alchemy furnace had already melted before the rock powder had melted, so it would be a waste of a Dan furnace, and shook his head, Zhi Lingqi also felt speechless for his own demise.

Taking out a bunch of Ding furnaces from the small space of the Qi Sea, Zhi Ling activated the Heavenly Eye Sense, explored all the several Ding furnaces, and selected a black furnace that he thought should be good according to his own cognition and feeling of the material of each Ding furnace, as the Ding furnace for this smelting.

After placing the black Ding Furnace and putting away the rest of the Ding Furnace, Zhi Lingqi took out a small pile of about twenty kilograms of fire stones from the small space of the Qi Sea, grabbed a dozen or so egg-sized fire stones, and put them into the combustion chamber of the Ding furnace.

In order to speed up the melting of the rock, Zhi Lingqi injected spiritual energy into the chisel axe, and began to crush, pound and grind the rock containing the fire crystal sand.

The rock is quite hard, it took nearly an hour of hard work, it can barely barely pound more than 30 kilograms of rock, gradually mash and grind into powder, after collecting the rock powder and pouring it into the Ding furnace, Zhi Lingqi ignited the fire stone in the combustion chamber of the Ding furnace.

Looking at the flames of the fire cloud, Zhi Lingqi had nothing else to do for the time being, so he had to stand next to him and quietly watch the fire cloud stone burn, silently waiting for the temperature of the Ding furnace to rise, and paying attention to the changes in the fire crystal sand stone powder contained in the Ding furnace at any time.

With the increase of time, the temperature of the Ding furnace body and the inside and outside is rising rapidly, and about a quarter of an hour, the Ding furnace begins to change color, gradually changing from dark cherry red to bright red, and the heat wave spreads outward wave after wave.

Affected by the high temperature of at least 2,000 degrees Celsius, standing in front of the Ding furnace, less than one meter away from the Ding furnace to Lingqi, he couldn't help but retreat two big steps back, opening up some distance between him and the Ding furnace.

The diameter of the Ding furnace is estimated to be about two feet, and the height of the Ding body is about one foot five or six, such a large volume of the Ding furnace is heated to a high temperature of more than 2,000 degrees, even if it is separated by one meter, its temperature may reach more than 100 degrees.

This was a temperature that ordinary people would not dare to bear at all, so he had to take two steps back, even though the distance between Zhilingqi and the Ding Furnace was now more than two meters, the temperature around his soul body was still more than sixty degrees.

For ordinary people, even if they face a temperature of forty degrees, it will be unbearable, and the temperature of sixty degrees will be unbearable, and only the cultivation foundation of the late stage of the Spirit Enlightenment Realm can barely withstand it.

Widening the distance between him and the Ding Furnace, he would no longer be able to use his eyes to directly observe the changes in the fire crystal sand stone powder in the Ding Furnace, for this reason, Zhi Lingqi opened the Heavenly Eye in time and used the Heavenly Eye Insight to closely monitor the changes in the situation in the furnace.

Half an hour later, the pyroptic sand stone powder in the Ding furnace also began to change, gradually turning into a dark cherry red, but it is not known how long it will take to melt, according to the experience of the Spiritual Enlightenment, if you want to melt the solid substance, it is generally at least more than bright red, and after reaching the bright color, it is possible to enter the molten state, and then melt and transform into liquid.

Since the ignition of the fire stone, more than an hour has passed, the color of the fire crystal sand stone powder rises with the furnace temperature, and no longer changes after turning to bright red.

At this time, the combustion condition of the fire aggregate stone, the condition of the Ding furnace body and the situation of the fire crystal sand stone powder actually entered a stable state of equilibrium and unchanged, even if Zhi Lingqi threw three pieces of fire essence into the combustion chamber of the Ding furnace, in the case of a partial increase in firepower, although the balance state of the three had a slight fluctuation, but the balance was quickly restored.

Zhi Lingqi guessed that if it was just ordinary rock powder, it should have been heated and melted into a liquid a long time ago, but in the igneous crystal sand rock powder, due to the fusion of a trace amount of igneous crystal sand, the melting point temperature has been greatly increased, so there is no sign of melting so far, and it is conceivable that even if the Ding furnace is completely melted, the rock powder will not necessarily melt.

In addition, judging from the continuous combustion of igneous stone for more than an hour, the intensity of heat energy generated by its combustion may not be able to reach the temperature at which the igneous crystal sandstone powder can completely melt.

Faced with this situation, Zhi Lingqi was also powerless, originally he wanted to add some more fire stones, and finally try to make sure, but it thought that after adding three fire stones, it had no effect, so he decided to give up.

After a little analysis, he was convinced that even if more igneous stones were added, there was a great possibility, but it would not be possible to change the inability to melt the pyrocrystalline sand stone powder, and he didn't want to melt the stone powder without achieving the goal, and also lost a good Ding furnace.