The steel rolling mill of the Mano Steel Consortium is very large in scale and is very modern according to this time and space standard. Because its main equipment is almost all unloaded from the ship and installed. However, according to the old time and space standards, this steel rolling mill is a typical backward production capacity that should be eliminated. According to several knowledgeable industrial veterans, once they enter, it seems like they have returned to township steel mills in the 1990s. Even the supporting power equipment is also the steam engine power. ** Before the large power grid pattern was established in the 190s, all regions rely on their own urban power plants to supply power, and even civilian electricity could not be fully guaranteed. Therefore, many small township steel mills at that time used steam engines as power. Shagang Group, the most successful private steel enterprise in China, was originally used to drive the steel rolling mill.

Continuous casting and continuous rolling are things that the veterans of the metallurgical mouth dare not think of, so the rolling mills use steel ingots for processing and forging of cooked iron. Several huge cooked iron truss-type factories are equipped with the main rolling equipment of the rolling mill: 2 initial forging machines, 2 hot rolling mills, 2 hot perforating machines, 2 cold rolling steel pipe machines, 2 cold drawing steel pipe machines, 2 cold pulling rod machines, and 2 cold rolling steel pipe machines. It can roughly cold rolling and hot rolling various common specifications of steel plates, strip steel, wire and various steel profiles.

Although the equipment is fully equipped, most equipment is not used frequently - firstly, there are very few workers who can use these equipment, and even if the veterans can use it, it takes a long time to accumulate skilled workers; secondly, the supporting equipment required by the steel rolling mill is very complex, including annealing and pickling, which seriously drags down the full load operation of the equipment. Finally, regardless of hot rolling and cold rolling, lubricating oil and coolant are required. Although it is said that Linggao Industry can currently supply substitutes for these things, in addition to the cooling water that can be supplied openly, other grease lubricants are limited by supply quotas. Therefore, many equipment is in a state of opening and stopping. The technical requirements of cold rolling are higher than that of hot rolling and the technical requirements for post-processing are very high, and the yield rate of cold rolling in the steel rolling mill has always been low. This is also the reason why Ji Wuyin decided to only manufacture hot rolled silicon steel plates.

The process of hot-rolled silicon steel plates is also very complicated, and the production cycle is as long as 12 to 15 days. If the silicon steel sheets used for transformers are produced, the time may be as long as 20 days. Therefore, a special annealing furnace must be installed to avoid long-term occupation. The manufacturing and debugging of these supporting equipment took a long time for the steel consortium.

During hot rolling, the primary heating steel rolling method is used. The silicon steel ingot is loaded into a heating furnace for preheating. The temperature of the heating furnace must be kept at 950c to 1020c, so that the final rolling temperature can be roughly controlled above 700c.

The heating furnace adopts a chain type, which is not very hot. The advantage is that it is uniform heating, which is more suitable for industrial standards like Linggao. Silicon steel plate rolling requires very high heating requirements. Losing some thermal efficiency is also a helpless choice.

First, the silicon steel ingot is rolled into a certain size rolling blank through a rolling mill, first rolled into a thin slab using a horizontal rolling mill, and then hot rolled. In this way, the slab tolerance can be controlled to a level of ±0.3mm, which roughly meets the tolerance control requirements.

After the slab is rolled and molded, it is stacked and molded according to a certain number of blocks. Then the rolled slab is heated to the rated temperature in the heating furnace for formal hot rolling.

After hot rolling, natural stacking cooling is first necessary, but this process is not conducive to decarbonization. Therefore, veteran technicians of the metallurgy outlet chose the rapid water cooling technology that Shanghai Silicon Steel Factory once used. The hot rolled silicon steel sheets are poured into water for rapid cooling within 10 seconds. This process not only reduces the natural cooling time, but also greatly improves the decarbonization level.

However, since the input into water is equivalent to a quenching, the hardness of the steel plate will increase significantly, which has little impact on the motor silicone steel, but it will affect the mechanical processing energy of transformer silicone steel with higher silicon content, so it is only used in the production of motor silicone steel.

After cooling, the silicon steel plate is then manually lifted, and the first component test is carried out to determine whether the element content is suitable. Then, it is hot rolled and flattened again, and finally annealed in an annealing furnace.

Annealing is a key link in the decarbonization of silicon steel plates. Silicon steel plates must reduce the carbon content to 0.02% during the annealing process to be considered qualified. The veterans of the industrial sector unanimously believe that the condition of Linggao can be broader - it is stronger than low-carbon steel no matter what. The stacking method is still used during annealing. The annealing furnace of the Manau rolling mill uses gas as fuel to heat it. If it is exquisite, pure hydrogen can be used to heat it, and the decarbonization effect is the best. Ji Wusheng can only be satisfied with gas.

During annealing, the temperature is gradually heated to 690c-750c at a rate of 15c-30c per hour, and then kept for 11 hours, and then the temperature is reduced to completely cool at a rate of 10c-15c per hour.

The temperature control of annealing furnace is very energy-consuming. Linggao Industry does not have automatic temperature control equipment. It relies entirely on manpower to check the thermometer to increase or reduce the gas volume of the heating nozzle to control the temperature. It is difficult to achieve accurate temperature control in a small range.

After 20 consecutive days of struggle, the first batch of silicon steel sheets for motors were manufactured. Ji Wusheng immediately sent someone to Ge Xinxin for spectroscopy component analysis.

The results of the composition analysis were unsatisfactory. According to the standards of the old time and space, the metallurgical mouth had to work hard for several months and spent a lot of manpower and material resources to make the silicon steel sheets were scrap. Then the magnetic surname was tested. The results were even more terrible, and the test results of the best part of the magnetic surname were not satisfactory. The veterans who were looking forward to the power outlets were like cold water toppings, holding ice in their arms: most of the silicon steel sheets made with great effort could not even be branded in the national standard, and about 10% could barely be enough for low-grade silicon steel. The most tragic thing is that there are still about 20% of the mechanical surnames in the finished product that can be problematic, which is a waste product that cannot be processed.

This failed trial production was the first time in the history of Linggao's industrial history. However, the veterans of the metallurgical industry knew that there was no strength in this area. To further improve the quality, they could only wait until the overall industrial level rose to one level before slowly exploring and improving it.

"This is so bad about the motor industry." Qian Liushi said sadly when he saw the inspection report.

Faraday is not as pessimistic as him: "I think it's okay. No matter what, it's better than not. This is the first; the second, the worst one is stronger than low carbon steel, right?"

"That's right, but this surname can be used to make such a surname. Do you have a copy of the ready-made motor design? "Qian Liushi said, "I think it's very unlucky."

"Although these silicon steel sheets are not the silicon steel sheets we hope for, they are not mild steel." Faraday said, "Of course, they are limited to silicon steel sheets. But it is finally a hope. Only with babies can we have a bad life, right? From low carbon steel to silicon steel, it is a qualitative leap, and we can only work hard to adapt to the existing conditions first."

"That's all. But the motor may have to be redesigned." Qian Liushi said, "Silicon steel sheets are the virtues. Let's not make too complicated hopes. How do you plan to solve the permanent magnets of permanent magnets?"

"I checked the information. Shilu iron ore is a magnetite of 42% purity, which is a very good sintering raw material for iron tetroxide. You can use this as a permanent magnet first. Of course, the efficiency is a bit poor, but we are all ready to go on the unbranded silicon steel sheets, which is even less important."

"Shilu Iron Mine has not been developed yet. I heard that it is difficult to transport foreign goods, so the Planning Institute did not put it in the first five years plan."

Although there has been a stable supply of slaves in Southeast Asia, more than one veteran suggested that Shi Lu develop the first five plan be advanced, and that after the engine operation, the veterans have brought up the old matters again. However, the Planning Institute has always vetoed this.

The main difficulty of developing Shilu iron ore is not the mining, but the transportation of iron ore. Shilu iron ore is located in the mountains. It is not only not as close to the sea as Tian Du, but also surrounded by rugged mountains. Railways must be built to transport large-scale transportation. At that time, the Japanese built the Bashu Line by filling in the lives of people.

If the construction of Shi Lu to Bashu or Shi Lu to Tian Du just consumes human life, the Planning Institute will not hesitate. Instead, the huge consumption of materials for railway construction discourages Wu Dewang, not to mention some engineering problems - such as how to construct a tunnel. Moreover, Bashu is not a natural port, and it has to be manually renovated to allow ore ships to use.

At present, the Planning Institute can only be satisfied with building a simple road to Shilu in Changhua, making basic transportation between the two places, and ensuring the influence of the Senate on this area.

"That's right." Qian Liushi thought for a while, "but magnetite ore is not a rare thing, and it's not difficult to find it carefully. If it really doesn't work, we will take a company, carry people on horseback, take Shilu on land in Changhua, and use it for a dozen tons. There is no need for much investment or project establishment."

The report of the silicon steel project also arrived at the office of the manufacturing director at the first time. The mechanical port is not as picky as the power port. In Zhan Wuya's opinion, it is time to solve whether it is available or not, and then discuss whether it is better. He urgently needs to expand the power supply to supply the non-ferrous metal smelting industry. In addition to providing electrolytic copper, he also hopes to obtain nickel, cobalt and other non-ferrous metals from it to smel stainless steel - the demand for stainless steel in the chemical port has been raised for a long time. A large number of corrosion-resistant pipes and containers in chemical equipment need stainless steel to be manufactured. If it continues to be at the level of manufacturing ceramic or glass equipment, Lingao's chemical industry is essentially just amplified laboratory production, and it cannot complete the self-replication of the chemical industry, let alone upgrades.

Therefore, as soon as the trial production of silicon steel sheet was successful, he immediately submitted to the Planning Institute and asked the electrolytic copper workshop project to be officially launched. (To be continued.)
Chapter completed!