Speaking of this, Xu Jixin suddenly sighed: "It's a pity that I couldn't develop a jig, otherwise I would have been able to desulfurize coal and transform bituminous coal into anthracite." ”

Zhu Shun looked at the appearance of the seventh disciple Xu Jixin, and almost couldn't help but knock him on the head, obviously because he was cheap and behaved.

The students of Jingshi University Hall standing near the flotation pool all held back their smiles, wanting to laugh but not daring to laugh, and they were quite uncomfortable.

In order to reward the seventh disciple Xu Jixin, Zhu Shun invented the flotation method to wash coal, and comforted him a few words along the way, so that he felt proud for a while: "What I have done so far is already very good, and I am very satisfied with the teacher." ”

"I heard that your brothers and sisters are preparing to recruit students on their own, and they want to allow the industrial middle schools in each county to apply for your college in addition to applying for the Jingshi University Hall."

"This matter has been considered by the teacher, and Brother Ying Xing has already begun to finalize the regulations, and when the regulations are perfected, you will be allowed to recruit students by yourself."

Xu Jixin and several other senior brothers were worried that this matter would make their mentor unhappy, and they had been discussing it in private, after all, they were suspected of standing on their own.

What Xu Jixin couldn't have imagined was that his teacher would really agree, and he was pleasantly surprised: "Really." ”

Zhu Shun did not answer Xu Jixin, after all, the ideology is different, and it is up to the students of later generations to choose which school they want to take the exam, in addition to the level of their scores, they also have a preference for the major.

In the Ming Dynasty, this situation is the self-reliance portal of deceiving teachers and destroying ancestors, how can this kind of self-contained thinking promote the progress of academic thought.

Xu Jixin finished happily and took out a report, which introduced the great significance of coal washing to Daming.

Zhu Shun took it in his hand and looked at it carefully.

The raw coal is washed by flotation and divided into two types of coal, coal gangue and medium coal.

Due to the lack of a jigger to complete further coal washing, it is temporarily impossible to classify more detailed grade B refined coal and grade A refined coal.

Coal gangue is large in volume and low in thermal efficiency.

Medium coal is small in size and has high thermal efficiency.

Xu Jixin attached too much importance to his research results for so long, and he was worried that his mentor did not know the significance of China Coal, so he asked people to bring two pieces of coal.

One is a coal gangue the size of a watermelon, and the other is a medium coal the size of a winter date.

Xu Jixin pointed to these two pieces of coal and said: "Master, it is also coal, and the thermal efficiency of the two types of coal flotation, the coal gangue the size of a watermelon, is barely equal to the medium coal the size of a winter date. ”

"That is to say, in the future, the packer coal only needs to be loaded with a very small volume of medium coal, which greatly saves the transportation cost of coal."

The fact that the principal and silver are sold is the root cause of the huge increase in the cost of coal.

The coal on the market in Daming can barely be regarded as medium coal, because it is only selected by hand, and the speed of selecting coal is pitiful, not to mention, it also contains a lot of ash and impurities, which also aggravates the quality of medium coal, improves the cost of carrying silver, and reduces thermal efficiency.

Industrial coal washing is different, flotation penalty once washed out of the coal is enough for hundreds of coolies to choose a day, this is just a coal washing pond.

With this flotation method for coal washing, the mass production and cheapness of coal have been initially realized.

Since then, coal can enter the people's homes, solving the problem of firewood, rice, oil, salt, sauce, vinegar and tea.

For the benefit of all peoples.

Zhu Shun looked at the seventh disciple Xu Jixin who was standing there happily, this kid didn't know the significance of firewood to the common people since he was a child, if he knew that the flotation method he invented to wash coal would be of such great significance to the people of the Ming Dynasty.

At this time, I had already run to my grandfather's grave and cried bitterly, firstly, I fulfilled my grandfather's wish, and secondly, because I had not kept filial piety for three years, Xu Jixin had suffered a lot of scolding and criticism, and I felt aggrieved.

Zhu Shun didn't know the importance of firewood three years ago in Chongzhen, but through his understanding of the customs of Daming over the years, he already had a very clear understanding.

The second brother Zhu Sihai was in Songjiang Mansion, so he specially went to understand the customs of Songjiang Mansion, and his understanding was more thorough than that of ordinary Songjiang Mansion bureaucrats and gentry.

Matsue Prefecture has no foothills and forests, so it can only be used as firewood for the reeds along the waterfront and the implementation of the planting in the fields.

However, reeds and straw poles are not as resistant to burning as wood, and there is not as much wood as there is, which also leads to the fact that the price of firewood in Songjiang Prefecture is much higher than that of the surrounding prefectures.

The price of a load of firewood is as high as a bucket of rice, and it is not old rice, but new rice.

The price of a load of firewood in the capital is only about three liters of rice, which is only one-third of that of Songjiang Mansion, which shows that the price of firewood in Songjiang Mansion is high.

The situation is even more serious in Henan, which is densely populated, and Runing, Henan Province, is very densely populated, and the more people use, the more firewood they use, so that there is a great lack of firewood.

Every year in the continuous rainy season, even the rich and noble families will have an embarrassing thing to do, breaking the door to cook.

Rich and noble families are like this, not to mention ordinary people who can't eat.

This is still in summer and autumn, and once it comes to spring and winter, especially in winter, the common people are even more miserable.

Daming is in the Xiaoice River period, and it is only in the beginning of winter when it reaches minus ten degrees Wen's degree, which is when it comes to the cold winter season, and it is difficult for ordinary people who have no firewood to heat through the long winter.

After the industrialization of coal, it has been mass-produced and cheapened, so that coal can enter people's homes at a very low price.

It is the countless merits of the living, and the accumulation of great yin virtues.

Xu Jixin's achievement is no less than that of the eldest disciple Song Shihui, and in terms of its current role, it is more meaningful than the high-yield hybrid rice of the eldest disciple Song Shihui.

The promotion of high-yielding hybrid rice required land, which was in the hands of the bureaucratic gentry and was hindered in various ways.

Until the eight years of Chongzhen have passed, the high-yield hybrid rice that is beneficial to the people has not left Miyun County, and has not even left Guantian.

Coal is different, and the industrialists can sell it wherever they want.

Zhu Shun suddenly asked again: "This kind of coal gangue with very low thermal efficiency and heavy quality, you look at it this way." ”

The seventh disciple Xu Jixin was a scientific and technological talent who was blowout at the end of the Ming Dynasty, and understood the meaning of what his master meant, so he said with a smile: "Although the effect of this coal gangue is very poor, it is of great significance to the industry. ”

"Coal gangue has low thermal efficiency, but it is also cheap enough, and the fire is easy to control, and it can be used to replace soft materials as firewood for firing cement and pottery."

Zhu Shun finally couldn't help laughing, he didn't expect Lao Qi to think of this layer.

Soft wood is rice stalk and wheat straw, which is much less than wood, but a lot of soft wood is needed to burn cement.

With the very low thermal efficiency of coal gangue, the price of silver is still low, and it is finally possible to expand the cement plant on a large scale.

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