[Don't just look with your eyes, first put a soundproof ban, add a spiritual light cover to yourself, and then the divine sense will come over, and I will take you through. 】

That is, the demon fairy dared to use this method to teach how to calcinate and refine the ore, Lu Xiaoman hurriedly laid down the ban, pulled up the spiritual light cover, and then as soon as her divine sense got on the ore, she felt that she fell into a warm surrounding, and then under the double observation of her divine sense and eyes, this fist-sized Huangxiao stone instantly became powder, but before the powder was scattered, it was swallowed by a dark red flame, and the impurities visible to the naked eye quickly turned into green smoke in the flames, and at the same time, the divine consciousness could see that the smaller impurities were still standing firm in the Danhuo.

[With your spiritual power, it is not difficult for you to crush the ore and get rid of the big impurities in front, the difficult thing is the continuous consumption that begins at this time, pay attention to the color of the fire is about to change, I want to increase the temperature of the fire, which will further increase the consumption of spiritual power, you can set up a spirit gathering array when you practice alone. 】

Ye Zhou's voice poured into Lu Xiaoman's mind, reminding her to pay attention to the change in emphasis, this kind of divine consciousness teaching technique wrapped around his disciples is his usual method, just like eating and drinking water as easy and natural, so it is more effective to walk with her than to let people look with their eyes on the side.

Lu Xiaoman, who was engrossed, didn't dare to be distracted, turned his eyes to chase the flames, and saw that the color of the flames turned from dark red to dark red, and the tiny particles that he had seen before in his divine consciousness softened and shrunk under the higher fire temperature, and the green smoke floated, and finally disappeared.

[Note that now it is the difference between the first-grade Huangxiao stone powder and other grades, continue to increase the fire temperature, and the color of the impurities is also impurities, and the color of the ore powder can be consistent only by removing these impurities. 】

The color of the flame became orange-red in a blink of an eye, and more Huangxiao stone powder was burned, leaving only a small part, and what was even more wonderful was that the ore powder in the fire was raised like a sieve, and the color was unified once it was sifted, and the mixed colors of different shades gradually tended to a willow leaf yellow hue, not pure and bright yellow.

[Remember this color, the color of the first-class Huangxiao powder belongs to the green system, with a little yellow in the green, if you burn out an obvious yellow tone, it is not right, anyone who tells you that the yellow system is the color of Huangxiao powder is the ghost. 】

Lu Xiaoman nodded subconsciously, and then felt a chill in his head, his consciousness returned to his place, and when the teaching ended, there was a small pinch of willow-yellow ore powder floating in front of him, and there was still an unextinguished residual temperature after calcination.

[Take out the small scale and weigh it, half a tael, no more, no less. 】

Lu Xiaoman hurriedly took out the measuring tool used for refining, it looked like a small scale, put the items on the left and put the weighing stone on the right, the small pinch of powder, it was indeed half a tael, no more, no less, and the pointer was just pointing at the zero position in the center.

[Accurate! 】

Ye Zhou shook his beard proudly, raised his paws, and kicked out another piece of Huangxiao stone.

[Now you practice by yourself, this piece has too many impurities, and it looks bigger than the previous piece of ore, but in the end, you can only get three and a half coins and a first-class product. 】

[Let me do it now, I can't burn first-class products.] 】

[If you can't reach it, you are unqualified, and my standard is only first-class. 】

[How can you know so accurately how many first-class products can be produced from each piece of ore?] 】

How is the iron content of iron ore calculated? 】

[噫~ore grade.] Lu Xiaoman suddenly realized, she forgot about this stubble, the process of getting first-class Huangxiao stone powder is the process of ore refining, how many raw materials to get and how many finished products are just a simple mathematical problem.

[There are grade standards for different ores, go back and read the book carefully, burn a few pieces of ore first and turn back, to prove that you are not lazy. 】

[Oh.] 】