Chapter 4492

Fortunately, the spirit of Lushan is extremely powerful, and there is no good way to untie the prohibition in this magic weapon. Only with the power of the spirit can we untie it one by one, which is nothing for Lushan!

After about ten minutes, Lushan has untied all the nine prohibitions in the Dan stove, which is a sigh of relief! And I'm glad that the alchemy hall has only prepared him a magic weapon level Dan furnace, otherwise if it's a treasure weapon level Dan furnace, I'm afraid it won't take at least more than half an hour for him to refine it. In that case... Where can he still have time to refine Dan!

Now it only takes ten minutes... It should be too late!

Seeing that Lushan had stopped after only holding on for so long, hall leader Yu would not think that Lushan had completed the sacrificial refining of the Dan furnace. Only after Lushan tried, he found that the Dan furnace was too difficult to refine, so they had to give up halfway!

In this regard, they feel even more speechless! It's not right for you to sacrifice and refine the pill furnace during the assessment. Since the sacrifice and refining... Strive to complete it. If you fail to pass the assessment at that time, you can also excuse that the time is too short to refine the pill. But now... Half of everything is done. It's really despised. It feels like a child's nature. Rotten wood can't be carved!

Lu Shan didn't care how they looked at themselves. At this time, he had begun to prepare for alchemy!

He patted his hand on the Dan stove again, and suddenly heard a "buzzing" sound. The Ding cover of the Dan Ding suddenly flew up, and then spun rapidly in the air like a top.

Then Lushan waved again gently, and immediately a breeze was generated out of thin air. It swirled into the Dan furnace. After a few swirls, it flew out with a light thin dust and gently fell into a wooden bucket in the corner. At the same time... The tripod cover, which had been hovering in the air just now, also fell slowly and had been tightly fastened on the Dan stove.

This step is called furnace cleaning, whether the furnace has been used or has not been used for a long time. Before preparing for alchemy, you must first clean the furnace to ensure that there is no dust or residue of the last furnace of pills.

If the pill is directly refined without furnace cleaning, once there is any dust or foreign matter in the pill furnace, it will cause impurities to be mixed after the pill is finished, which will reduce the quality of the pill. The most important thing is... It will lead to the direct failure of alchemy.

Most alchemists clean the furnace directly and manually, because it is relatively clean, so it is not easy to leave future troubles. They don't know some techniques that can be used to clear the furnace, but... It's OK for you to attack the enemy with spells, but it's really difficult for ordinary practitioners to complete such fine work as clearing the furnace.

The inside of the Dan stove is not like an ordinary iron pot. It is so flat and smooth, but there are many bulges and depressions. In this way, if it is cleaned by technique, it will easily cause some mistakes and omissions.

Of course, the official alchemists in the alchemy hall are delicate and expensive. Generally, they don't go to clean the furnace manually by themselves, but they will let their own alchemy apprentices do it. After doing it, the alchemy teacher will check it. If the apprentice doesn't clean the furnace well, he must be severely punished!

When they saw the process of cleaning the furnace in Lushan, hall leader Yu summoned a wisp of breeze. It was completed within a few seconds. Suddenly, they shook their heads secretly!

Because they think it's too big for Lushan to clean the furnace like this. In this way, the furnace cleaning looks very natural and unrestrained, but just a wind blows in. Can you really clean the furnace? If you clean up the Dan stove, how can you refine it well!

Alas... It seems that this boy not only has no experience in alchemy, but also has strong vanity. He has no practical means to clean up these flowers... Such people are not rare in their alchemy hall!

Now hall leader Yu even wants to consider whether he will shut him out even if he has refined two heats of first-class pills!

It's true that he doesn't like this boy anywhere now. He really doesn't want this guy to enter the alchemy hall. What if he leads other disciples of the alchemy hall to be damaged at that time!

But then think about it... The boy didn't even do a good job in sorting medicinal materials. Each medicinal material collected was just enough for the Dan prescription. Then even if he cleared the furnace properly, he couldn't make a furnace of Dan medicine! So... Hall leader Yu immediately calmed down and looked down at the hourglass with sand falling down. Just wait until the last sand in the hourglass leaks out, and directly announce that the assessment failed!

After clearing the Dan stove, Lu Shan stepped back and came to the table.

Next, according to the alchemy procedure, we should start to ignite the furnace... We need to wait until the temperature in the furnace is preheated to a certain temperature before we can start to input medicinal materials for purification.

For each kind of different medicinal materials, the temperature required for purification is different. After reaching this temperature, the corresponding medicinal materials must be input in order to completely extract the effective components from the medicinal materials without loss as much as possible. If the Dan furnace has just started ignition and the temperature has not reached the corresponding height, it is urgent to put in the medicinal materials, then the medicinal materials put in first will only be carbonized in the process of heating up, resulting in the failure of purification.

However, Lushan did not open the fire under the Dan stove

This crater is directly connected to the ground fire source tens of thousands of meters deep underground and leads out the ground fire through the array... There is such a crater in each alchemy room of the alchemy hall. After opening it and adjusting it, you can probably get the fire temperature you need, which is very convenient.

But... Although the ground fire is controlled by the array, it will fluctuate to a certain extent!

It's like an ocean. Even in sunny weather, the sea looks very calm from a distance... As if there were no wind and waves! But... No matter how good the weather is, the sea surface will rise and fall from time to time, forming a certain microwave! The real calm is almost impossible!

And this earth fire is the same... The so-called earth fire is actually the magma sea deep underground. Although the magma sea is composed of magma, it will also have wind, waves and ups and downs!

If it's just an ordinary slight fluctuation, it's all right! Although this level of magma sea fluctuation will also make the ground fire guided by the array slightly unstable, generally speaking, the change of fire temperature will not be too large, but it is still within the allowable level.

However, once there is any crustal movement underground, it will lead to the sharp fluctuation of ground fire. If someone is refining pills at that time, it will probably be bad luck!