Heavenly Spirit Continent,

Color Valley.

After several months of development, the construction of Caigu was carried out in an orderly manner, and the construction of various projects was in full swing.

Caigu, refractory brick production base.

Workers have burned dozens of refractory bricks, after continuous testing, analysis of the reasons, the product pass rate is getting higher and higher, from the beginning of 20 pass rate, has been increased to 33 pass rate, will be close to the pass rate standard set by Momo.

Two workers are holding test tools and sampling the surface dimensions of the refractory bricks that were baked the day before yesterday.

The refractory bricks that have just been baked turn from hot to cold, the internal stress is being relieved, and the size changes greatly, so it is not suitable for inspection.

"Director, according to the standard given by the young master, the pass rate of this furnace brick is also poor, and three out of five bricks are unqualified. A quality inspector reported the data to Fang Shi, the supervisor of the engineering construction team.

"Well, the cracks are still too big, and there are many, and some of them are not strong enough, and everyone has also seen the production video of refractory bricks, think about what the problem is. "The young master hasn't been to the base for a long time, Fang Shi can only watch videos to learn, and accept clay bricks according to the acceptance criteria he gave.

The pass rate of refractory bricks formulated by Mo Mo is 35, and the goal in Fang Shi's heart is 40, at least to satisfy the young master.

Fang Shi remembered that the young master said that whether the quality inspection is qualified or not is based on the standard.

Take clay bricks as an example, first check the appearance, to see the size, depth, number of cracks, more cracks, molten steel will seep into the crack gap, and it is easy to break.

The appearance inspection items also include the detection of the length, width and height of the refractory bricks, the error should be within the standard range, the particle size, the pass rate is low, and the sampling inspection can not be carried out, and the initial inspection should be 100% carried out once, and then re-inspected once.

They also found that after the initial inspection, it is not completely guaranteed that the tested products are qualified, and there are 5 unqualified products flowing into the re-inspection process, so the proposed re-inspection process idea is correct.

Although there are inspection standards, relying on personnel testing, the technical level of personnel is not the same, the surface of the product is complex, and there is still a certain error in the results.

It took them a long time to learn about testing, but fortunately they have been learning mathematics for months and already know how to use new tools.

The visual inspection is followed by a simple pressure test.

"Now the appearance quality is no problem, I think we still have to start with the raw materials, the composition of clay brick materials is too complex, not uniform enough, and the impact is great. A skilled worker analyzed.

"This is also true, the surface of refractory bricks with high impurity content will be very rough, and those refractory bricks with high quality have uniform overall color and smooth and flat surface, maybe we can screen raw materials many times to remove impurities. Fang Shi thought about it, and also felt that some details were easy to overlook.

"Director, what do you do with those unqualified refractory bricks? Another skilled worker asked.

Fang Shi said solemnly: "Anyway, it can't be used in the construction of cement cellar furnaces and iron-making blast furnaces, it must be in accordance with the standards of the young master, what if something goes wrong, no one can afford the loss." Quality first, how many times have you emphasized it!"

"Of course I know it can't be used there, Director, and it's okay to use it for building a house or building an iron-making hearth, right?"

"Okay, just don't affect it. You are staring at the inspection here, and I want to go to the cement project base to have a look. Fang Shi also said that the inspection work was handed over to the team leader of the quality inspection department.

The cement project has been going on for several months and has now produced cement, but the daily output is not high.

Fang Shi rode a horse to the cement project site to inspect the production situation.

There are two mills and one firing in the production of cement: raw meal preparation, clinker calcination and cement grinding.

Qinglong Group's raw meal preparation method for making cement is relatively rude, first using animal carts to carry stones to the material yard, and letting people use hammers to break the big stones with brute force.

Large boulders are crushed into small stones, which are completely broken by manpower, completely different from the earth's crushers.

This is because Qinglong Group does not have a high-power crusher.

The only way to crush large stones into small stones is to push them into a crusher made by the blacksmith's house to crush them at a deep level.

If the stone is not crushed and the powder state is reached, the raw material preparation is uneven, and it is difficult to calcinate, and the reaction is incomplete.

Speaking of which, the crusher is very easy to use, with the waterwheel as the power, connected to the crusher, as long as the small stones are slowly pushed into the hopper, after the first round of vibrating screen, the rotating drum will squeeze the small stones falling from the vibrating screen, and then get finer stones, and then flow into the rolling mill, and the powder that meets the fine particle size will fall from the second round of vibrating screen into the semi-finished hopper.

The powder has to be calcined in a preheating furnace and calcining furnace built by itself, and finally through a rotary kiln, and finally the cement block is cooked.

After the cooked cement is cooled, it is then crushed, and the crushing method is processed as follows, and finally the cement powder is obtained, which is loaded into wooden barrels and sealed.

These methods are new cement production methods researched by Fang Shi after they have seen the cement making video, and then reminded by the young master to study the situation of Caigu.

The theory is this, and there is video guidance, but in the actual production process, they failed many times before they succeeded.

At present, the daily output of cement is 15 tons, and if calculated according to nearly 20 workers, the per capita output is less than one ton.

When the refractory brick project is completed, more workers will be invested, and the daily production of cement will be greatly increased.

As soon as Fang Shi arrived at the cement base, a young man of about twenty-five years old hurriedly ran to him.

The young man's name was Hao Lu, and he was in charge of the cement warehouse.

"Lord, Director, it's not good!" Hao Lu said urgently.

"What's wrong? Panic, what's going on?"

"It rained heavily last night, the roof of the warehouse was leaking, and the cement in many wooden barrels was wet. ”

"Let's go, let's see. When Fang Shi heard this, he was worried, and after speaking, he ran to the warehouse first.

It was the rainy season in May, and they had prepared for it, but there were still some mistakes.

If the cement produced was all soaked in rainwater, Fang Shizhen didn't know how to explain it to the young master.

After a while, the two of them came to the warehouse, picked out the mud from their shoes, and then walked into the warehouse.

After Fang Shi entered the house, he looked up at the roof and saw that there was still water leaking in some places, and the water beads gathered into a thin line, dripping on the wooden barrel, splashing water one after another, and there was also water on the ground.

Fang Shi sighed, then knocked open the wet cement barrel and kneaded the wet cement, some of the cement was already lumpy, obviously unusable.

Some of the soaked cement, after a night of soaking, has solidified.

"Director, I think it is difficult for the wooden barrel to seal the cement, even if it is not soaked by rainwater, but if the air is humid, the moisture can pass through the gap between the barrels, and our cement will not be stored for a long time, so we have to find a way to seal it tightly and seal it with paper?" Hao Lu suggested, also worried.

"Well, I know, there is no good way at the moment, it's too wasteful to wrap in paper, and paper is easy to get wet, if only there was the kind of moisture-proof paper cloth from the young master's family. ”

"Team leader, do you say that you can use clay or a layer of cement to seal the gap between the barrels, so that you are not afraid of rain, but when you want to use it, it is more troublesome to knock on the lid. Hao Lu thought for a while, and an idea suddenly flashed in his mind.

"Hey, you're so nimble, that's a good idea. Fang Shi patted him on the head, "What other good ideas are there to keep out the moisture, think again." ”

"In this warehouse, it is best to raise the cement barrels one layer higher, so that there is no fear of water flowing, and it also prevents moisture from the ground from penetrating the barrels. The roof of this warehouse, which is no longer wood-paneled, has to be covered with tiles and then sealed with cement. ”

"Well, it's a good idea, send someone to execute it right away. If you have merit, I will register it and report it to the young master. Fang Shi said encouragingly.

"Hehe, that's embarrassing. ”

"The young master likes people with clever brains, don't be embarrassed, you have to work hard in the future. Fang Shi said appreciatively, "You see, there are many problems with wooden barrel cement, making wooden barrels can be troublesome, the cost is high, we use cement is also troublesome, you see if you can make a cheap and easy to use bag, just like the cement bag in the video, this errand will be handed over to you." ”

"Okay, Director. If you can ask the young master, what is the cement bag made of. ”

"Well, I don't know, it feels like paper, but paper has such good toughness, I'll ask the young master next time I see him." Fang Shi couldn't figure out the cement bag, the young master's things were too amazing, and many of them didn't understand the principle.