The ironmaking technology of Dwarf Technology is insufficient, and the requirements for refractories are not high, but once the technology is upgraded, it will encounter huge production risks.

With the large-scale scale of the blast furnace and the increase of the iron production rate, the blast furnace iron production capacity has increased exponentially, and the operating conditions have become more and more demanding.

Therefore, it is imperative to improve the quality of blast furnace refractory bricks, improve the life of blast furnaces, and reduce the price of refractory bricks.

"In order to make a blast furnace, the refractory bricks used to build the furnace body must be stable in volume at high temperatures, have higher mechanical strength than the existing level, have good resistance, dense structure, low porosity, slag resistance, low iron oxide content, and do not interfere with the quality of molten iron......

Anyone can make a request, but the key problem is to solve the problem.

At present, the bricks fired by the dwarves have been used in iron-making furnaces, but they are only barely reaching the melting point of molten iron, and they are completely uncertain about higher temperatures.

Not only is the performance not up to standard, but the output and durability are not enough, and the furnace will fall apart after a short time, and the iron will be wasted.

Party A made a request, and Party B's dwarven craftsmen frowned, and the more knowledge and ideas the lord had, the more difficult it was for him to serve.

However, in the past, if the craftsmen could not do it, the nobles would kill people to punish them.

No one knows how to kill people better than demons, and even if the monsters keep to themselves in the town, the terrible legend still exists in the subconscious.

I was so worried that the lord was a sanctimonious tyrant, and the dwarves were so worried about it that they couldn't eat during the day and couldn't sleep at night.

However, the subordinates who were familiar with Vincent were quite calm, especially Ninia, who knew that since the lord had asked for this, she must have prepared a corresponding solution.

The lord also taught him such things as "killing without teaching" and "violence without abstaining from it", and although she did not understand Vincent's strange expression, she agreed with this opinion.

It's like he always lets himself do things that seem to be difficult for a strong man, but in fact, he has already prepared a method, as long as he can implement it firmly, he will eventually break through the difficulties and bring unexpected benefits to himself.

Perhaps, as the lord often said to her, if you don't push yourself, you will never know how good you are.

"Don't worry, the lord's refractory brick workshop has already been built," Ninia said to the helpless Demara, "In my hometown, the lord has built a workshop to make glass, and the refractory bricks fired are very useful."

The refractory workshop in Sweetwater Village was built by Vincent during the suppression of the rebellion, and it is the clay bricks fired at that time that are used in the glass kilns today, and many of them are sold to merchants in addition to being used for the lord's industry.

In addition, there is also a brick kiln near Silver Dragon Castle that provides similar products, which was set up at the special request of Lord Safin, the president of the Mage Guild, to upgrade the joint venture glass workshop - this time Vincent came out with technology, basically no money, and the gold coins were all from the local Mage Guild.

In addition to the Mage Guild, the Bishop Beckman of the Church of Light was not absent this time, and as glassware became more and more popular in the church, the Bishop was also a little worried about the production.

Therefore, he told Vincent many times that as long as there is investment in the future, the church will generously fund it for the benefit of the people.

With gold coin investment, there is also a demand for products, and upgrading technology is fast.

This time, Vincent also sent someone to bring back the craftsmen of the workshop to support the construction of the mountainous area, so he was completely sure of this matter.

As a result, the workshop for the production of refractory bricks was the first to be done, because the dwarves themselves had mastered the construction and use of brick kilns, and there was a brick kiln in the town, which could be used to fire all kinds of brick and tile building materials from the mountains, and Vincent thought that its quality was not bad, but the technology needed to be improved.

The dwarven craftsmen built a sizable inverted flame kiln on the hillside, which was originally used to fire various bricks and pottery, and was an indispensable and important facility for the locals.

The reason why this kiln was built along the mountain is to take advantage of the structure of the natural cave on the hillside, the dwarves built part of the brick structure outside the cave more than one person high, and the remaining kiln body used the natural cave to form a huge internal space, saving time and effort.

The internal structure is simple, because the cave is flat, not too much masonry is used, but it is smeared and closed with gravel cement in the gaps.

The main body is hidden in the cave, and the lower part is only raised with masonry, and there are no complex structures such as additional fire holes or side flues, so it is relatively easy to use and maintain.

At the tail of the cave, which is getting smaller and smaller, the dwarves have closed the rear end with masonry, and built a flue above the hillside to ensure that the smoke can be directly extracted from the outside, and there are three firewood holes at a higher position on the top of the cave, and there are no bricks below, so that firewood can be thrown into sections when in use.

Originally, all the firewood used was cut from the mountains, and it could be used without coal, which was also a last resort for dwarves who needed to return coal to make steel, although the temperature was not high, but the effect could still be achieved.

When burning bricks, the sectional burning method is adopted, the outer fire door is closed first, the vent is retained, the clay embryo to be fired is placed and then the firewood in the fire hall is heated with a low fire, and after the firewood inside is burned for a day and a night, you can continue to add firewood to the inside to keep the burning inside.

The three dwarves worked humming on the roof of the kiln, throwing firewood from the front, middle, and back directions, and this kind of work lasted from a whole day to a day and a half, and it was very hard to find someone to change shifts in the middle.

The falling firewood burned between the mud embryos, gradually increasing the temperature in the kiln, and when several dwarven craftsmen noticed that the temperature below was high enough when they were throwing firewood, they would stop the fuel from the front and plug the firewood hole with the prepared bricks.

In this way, on the second day, Vincent finally saw the firewood burning from the head of the kiln to the end of the kiln, and in order to increase the wind, Vincent also asked the wind magician to blow the wind inside, and the effect was also very good.

By about the early morning of the third day, the fire in the kiln had been completely extinguished, which meant that the clay embryo inside had been fired.

Based on Vincent's experience of firing items on a regular basis, the temperature inside is similar to the temperature at which iron melts, and it is sufficient to fire refractory bricks.

Open the front fire door, because the fire at the kiln head has been extinguished yesterday, so the temperature is not too high, and the kiln can be carried out first.

Out of the protection of the craftsmen, Vincent personally took the undead to carry the bricks under the attention of everyone, and the chaos demons of his level were not afraid of heat, but this still made the craftsmen in the town respect.

I had never seen or heard of a noble lord working in a dirty and hot earthen kiln, but Vincent was moving bricks while chatting and laughing with the people next to him.

Somebody counted, and he alone moved more than two hundred bricks, which was more than a skeleton.