On this day, Wu Yanzhi came to Shang Fangjian to handle the entry procedures of Sun Heng, Jiang Shipeng, Cui Yu and others.

Hu Cheng had already arranged the office room, and Wu Yan saw that the Zhangye Department actually had a special house. The commander of the office took the initiative to give up his office room and became Wu Yanzhi's office.

Here is an introduction to the Tang Dynasty's Zhangye Administration. The Zhangye Department is a subordinate agency of the Shang Fang Jian (Shaofu Supervisor). Since the Tang Dynasty implemented state and county management, this "agency" is naturally equivalent to "county".

The Metallurgical Administration, as can be seen from its name, is of course in charge of the world's metal mining, smelting and other affairs.

All dozens of metallurgical supervisors and coinage supervisors in the country must accept their professional guidance in their operations. Of course, it is not a leader, and the leader is the responsibility of the supervisors of each metallurgical superintendent.

There are five quality officials in the Zhangye Department: one order, and eight products; Cheng (deputy) two, is on the ninth grade; The superintendent is two people, from the ninth grade.

The name of the Zhangye Department is Huang Jian, who is in his forties, and used to be a county order.

He was still very satisfied with being able to go to Luoyang, the capital of God, as an administrator, even though his position was very low.

"Wu Langzhong, the humble position will serve under Wu Langzhong in the future, please take care of it!" Huang Jian is extremely humble.

For him, becoming a five-grade official is a lifelong dream, and the possibility of realizing it is not great.

"Huang ordered to do what he did well! As long as you do a good job, I will recommend it! "The Way of Martial Arts.

He saw that Sun Heng and the other three next to him had arrived, so he asked everyone to enter the conference room together.

That Cui Yu had already changed into his official uniform, and he looked very energetic.

This room is not small, and it can seat fifty or sixty people for a meeting.

First led by Hu Cheng, the three staff members and several officials of the Zhangye Department got to know each other.

Then, Hu Cheng began to preside over the meeting: "Ladies and gentlemen, according to the arrangement of Supervisor Qiao, the contemptible people will be responsible for contacting the affairs of the Metallurgical Administration and the Metallurgical Supervisor in the future.

That is, under the direct leadership of Ambassador Wu, below, please give Ambassador Wu a lecture! ”

Wu Yanzhi nodded, swept his eyes into the room, and took charge of the five officials of the Metallurgical Department, the three staff officers and Hu Cheng brought by himself, and the two officials who made the meeting minutes.

"In the future, all the affairs of the Metallurgical Department and the Metallurgical Supervision will be in charge of Judge Sun, and when I am not there, he can sign on my behalf.

Documents that need to be reported to Shang Fangjian will all be signed and judged by Hu Cheng, and Judge Sun will sign it! Huang Zhiling, you can introduce the situation of the Metallurgical Administration, the Metallurgical Supervisor, and the Coin Casting Supervisor! "The Way of Martial Arts.

"Yes! The Palm Metallurgical Department, together with the five officials, has a total of 50 people, including six from the government...... "Huang began to introduce them one by one.

Wu Yan heard that there were not many metallurgical supervisors in the world at this time, only thirty-two, distributed all over the country, and there were only twenty-six coinage supervisors.

The metallurgical supervision has a special management organization, and the supervision is the lower level of the seventh grade. The Superintendent of Metallurgy is responsible for collecting taxes on metals such as copper and iron (not only copper and iron, but also other metals), purchasing metals, and mining and smelting metals.

In other words, the metallurgical supervision is not only the management organ of the mining and metallurgical industry, but also the production enterprise.

There is no special agency for the coinage supervisor, but it is concurrently served by local state and county officials and officials.

After he finished his report, Hu Cheng asked Sun Heng to speak again. Sun Heng only said some polite words.

Finally, it was Wu Yanzhi's concluding speech: "Brothers, most of you may have heard that the contemptible people have already boasted in front of the saint that they will add millions of catties of copper and millions of catties of steel a year.

It's up to us to complete these tasks! I plan to start producing bile copper in Raozhou in September! Huang ordered that you quickly go down to the smelting superintendent in Raozhou and nearby to buy seven or eight hundred thousand catties of pig iron! Even if the quality is a little worse, it doesn't matter, all of them are shipped to Raozhou Leping Metallurgical Supervisor! ”

"Yes!"

"Judge Sun, this copper and iron envoy needs to increase the number of officials, you can contact the Heavenly Officials, and they will arrange for someone to come.

Before the people are not complete, they will be transferred by the Metallurgical Department to serve part-time, and for part-time personnel, they must be preferentially assessed! ”

"Yes!"

"Ladies and gentlemen, I don't mean to say big things, I plan to gradually increase the annual copper output to 10 million catties or 30 million catties in the future.

Iron and steel production will be increased to 100 million catties and 1 billion catties! As long as you follow me, you don't dare to say that you will get rich, and there is no problem with promotion! Wu Yanzhi said ambitiously.

When everyone heard this, they were shocked! At this time, the country's copper output was less than 2 million catties, and the steel output was less than 8 million catties.

Wu Yan's 100 million openings are five times, ten times! Where did he get this courage and audacity?

Although many people were skeptical, no one dared to object! Because, now the entire Luoyang City is rumored that Wu Yanzhi is going to build bridges and pave roads.

As soon as he came, he accomplished two major things and was recognized by the emperor, which is not everyone who has this courage.

At this time, Hu Cheng said: "We must follow Wu Langzhong, produce more copper and iron, and create the glory of my Great Zhou Dynasty!"

So everyone also followed him and touted: "Wu Langzhong is a genius of Qinxuan, we will do our best to ......"

……

In the afternoon, Wu Yanzhi asked Gao Jinkui, the official of Zhen, and the two supervisors to summon them, and in his office, he taught them how to burn cement.

The Zhen Guan's Office, a subordinate agency that will be the superintendent, is responsible for carving stone tools, firing bricks and pottery, etc. These things are all in the service of architecture.

Wu Yanzhi asked several of his staff members to participate as well.

"This cement is a new building material that is being studied by contemptible people! It's a hundred times better than the stone we use most! "The Way of Martial Arts.

Everyone was naturally in a fog and half convinced.

Wu Yanzhi looked at everyone's puzzled eyes, shook his head, and continued: "However, this firing cement is still a little troublesome.

The main process is 'two grinding and one firing', that is, the raw materials used are ground finely before firing......"

............................... dividing line....................................

(Don't look at it)

Here is an introduction to cement knowledge:

Our most common cement is ordinary Portland cement! He uses about 85% dry limestone, 10% dry clay, and 5% iron ore powder (different grades, different proportions, and some other things), which are mixed and ground to become raw meal.

The raw meal is then put into the furnace and burned. The temperature is about 1350~1450 degrees, and this temperature is generally achieved by burning coal, and charcoal is very difficult.

After burning, it naturally becomes clinker! It is also necessary to add an appropriate amount of slag ash, fly ash, etc., as well as a small amount of gypsum as needed. After a second grinding, this becomes cement.

The process is "two grinding and one burning"! Of course, the higher the cement grade, the more difficult it is to produce, the higher the cost, and the higher the unit price.

Let's introduce the principle of cement hardening:

Ordinary Portland cement clinker is mainly composed of tricalcium silicate (3CaO? SiO2), dicalcium silicate (2CaO? SiO2), tricalcium aluminate (3CaO? Al2O3) and tetracalcium ferroaluminate (4CaO? Al2O3? Fe2O3).

Its relative content is about: tricalcium silicate 37~60%, dicalcium silicate 15~37%, tricalcium aluminate 7~15%, tetracalcium iron aluminate 10~18%.

These four minerals can all react with hydration when exposed to water, thereby solidifying and hardening.

For example, tricalcium silicate, its reaction formula is:

3CaO? SiO2+H2O→CaO? SiO2? YH2O(gel)+Ca(OH)2;

Tricalcium aluminate, the reaction formula is:

3CaO? Al2O3+6H2O→3CaO? Al2O3?6H2O

Two other substances are similar.