Because of the use of gas, coke is no longer needed in the steelmaking process. Even coal that is not suitable for coking can be provided with gas fuel through the gas generator. [No pop-up novel website] The combustion flame formed after the air and gaseous fuel are mixed covers two-thirds of the height of the furnace and rushes to the top of the surface of the charge. The furnace through which the flame passes is a rectangular shallow groove made of heat-resistant materials. In order to prevent the solid particles in the exhaust gas from settling in the brick grid, the exhaust gas first passes through the sediment chamber to settle the solid particles, and then is discharged to the chimney. In the process of exhaust gas discharge, the exhaust gas transfers part of the heat to the gas and air entering the furnace through the brick grid channel. As a result, the flame temperature in the furnace rose to 165obsp; Since the Siemens-Martin open-hearth steelmaking method can smelt large amounts of metal at higher temperatures, it has been widely used and became the mainstream of the steelmaking process in the 20th century.
The refractory lining on the inside of Ma Niao's open hearth wall is made of magnesia bricks produced by the bittern factory. The bitter brine factory of Majiao Salt Field extracts magnesium hydroxide from bitter brine, a by-product of industrial salt production, and then calcines it at high temperatures to make refractory bricks. This brick-lined furnace is an alkaline furnace.
Early converters and blast furnaces used silicate fireproof materials, which are so-called acidic furnaces. Acidic furnaces can remove manganese, silicon, carbon and other elements in ores and pig iron, but they cannot remove phosphorus. As a result, steelmaking and ironmaking must either only use phosphorus-free iron ore, or produce inferior steel. The UK has a large amount of phosphorus-free iron ore, which gives it a great advantage in industrial development. The emergence of the alkaline method has greatly increased the utilization rate of various inferior iron ores. Germany's steel industry has been able to catch up from behind, largely due to the alkaline furnace process.
China's iron ore generally contains phosphorus, so most of the pig iron purchased from Guangdong contains more phosphorus and has a brittle texture. In the past, when converters were used, phosphorus components were removed through a slagging process by adding baking soda and limestone. However, this process is not thorough enough, and the quality of the steel produced is poor.
This time Ji Wusheng decided to use the alkaline method to make steel in an open-hearth furnace. Magnesia bricks are also used as fireproof linings in blast furnaces. However, the relationship between the acidic method and the alkaline method is not backward and advanced, but two different processes. Which method to use depends on the iron ore and what kind of steel is needed. Therefore, the acid furnace still needs to maintain a certain amount. Ji Wusheng decided that the small converter will continue to use acid lining.
Within three or four days, the machinery port assembled a dredger and started dredging work in Hongpai Port. The Navy not only dispatched ships and personnel, but also sent surveying boats to conduct hydrographic surveys at the port, and used buoys to mark available channels and berths. Mond immediately instructed the Port Authority to tow the floating barges in stock to Red Card to form a floating trestle for cargo to be disembarked. The fixed trestle was also put into construction immediately. The wooden piles are driven one by one into the sand at the bottom of the Red Card Harbor. They will form a freight channel extending to the berths in the harbor. Temporary flatbed truck tracks and cranes will soon be erected above to unload various construction supplies arriving by flatbed barges.
Yanchang Village was re-planned and the entire village was moved to the newly built Ma Niao Commune. This is a "new countryside" built according to the model of Bairen Commune, with centralized management of residential areas. Ma Niao Commune was positioned as a professional producer of salt fields, and all the labor force was recruited into the salt fields. A small number of local fishermen were moved to Bobu Commune, which mainly focused on fishery production.
Ma Niao Salt Farm is not only the main supplier of edible salt in Lingao, but also the source of chemical raw materials and an important financial resource for Chuan Chuan Group. Although the status of their fiscal revenue from selling illegal salt in the entire export trade continues to decline, the source is very reliable and stable. Even before and after the second counter-encirclement and suppression campaign, when imports and exports fell sharply, their illegal salt on the continent continued to decline. Agent Liu Gang still quietly transported ships of salt from Lingao,
Now, they actually have control over all the salt fields in Hainan - along the Qiongzhou Strait, there are many historical seaside salt fields in Qiongzhou Prefecture. However, these salt farms are the same as the Ma Niao Salt Farm in the past. Salt residents have fled, production is in decline, production facilities and methods are extremely backward, and salt output is not high. They are in urgent need of rectification and technological transformation. This is not something that can be accomplished overnight. Therefore, Ma Niao Salt Farm is still their main source of salt.
Due to the foreseeable problem of seawater pollution, some elders believe that we should immediately consider opening a salt farm in Yinggehai or along the coast of Guangdong, and use Ma Niao's salt only as industrial salt. But Ji Tuisi thinks there is no need to be so nervous.
"In the old days, the Bohai Bay coast was still the main production area of sea salt. The industrial pollution along the Bohai Sea coast was much greater than that of a small steel company here. The heavy chemicals, steel, machinery... which are not included in the Bohai Rim Industrial Belt Highly polluting industries?" Ji Tuisi said, "In the worst case, we will get some special salt supply from Leizhou for senior officials - aren't they just afraid of eating high-iron salt?"
The first blast furnace finally completed the shell construction under intensive 24-hour continuous operation and started the 24-hour oven. After the oven has finished cooling, the blast furnace lining of refractory bricks will be laid. After the lining is completed, the oven will be baked again.
The purpose of the oven is to remove moisture in the furnace. The moisture will reduce the temperature of the furnace bottom, causing accidents such as sitting on the bottom and failure to discharge iron. It will also affect the life of the furnace and cause cracks in the furnace wall.
The second oven is more critical. In fact, starting from the second oven, there is no longer a ceasefire in the blast furnace, but materials are added directly for continuous production. Therefore, the second oven cannot be started until the concentrate powder is shipped from Sanya. As for coke, a lot of it has been accumulated in Bopu. Shipments of coke are transported to Ma Niao and broken into 2 omm-sized coke particles, which are then loaded into silos for use.
Thanks to the efforts of the elders in Sanya, the Great Whale finally transported back the first shipment of iron ore powder from Sanya on February 10. Later, two navy transport ships carrying out supply missions transported back the open-hearth ore and blast furnace. One ship each of ore. Wang Luobin assured that as long as the transportation capacity is sufficient, with the current inventory situation, 2 to 3 ships of iron ore concentrate can be shipped every week, with each voyage of 15o to 25o tons. This kind of transportation speed is enough to ensure the continuous production of blast furnaces and open hearths.
Ji Wusheng and Wu De discussed and decided that the official ignition time for the blast furnace and the open hearth should be at the end of February, so that a certain amount of iron ore concentrate can be reserved in Lingao to prevent Sanya's ore supply from being interrupted.
"The amount of ore concentrate and coke required for at least one week's production must be maintained. In case of interruption of sea transportation or problems with Tiandu's production, we can ensure that the furnace will not stop." Ji Wusheng said, "There is also thermal coal, and the steel plant must have a special project Reserves - earmarked funds. They cannot be lumped into the fuel department for calculation - thermal coal must also be reserved for at least 7 days, and of course coal used for gasification must also be included in the quota."
Lingao Steel Company is a steel company that imports both coke and iron ore, and is highly dependent on foreign countries. Coking coal is shipped from Jiazi Coal Mine in Qiongshan, iron ore is shipped from Sanya, and thermal coal is shipped from Guangdong and Vietnam's Hongji. Thermal coal is lifeblood for steel companies that rely heavily on steam engine power. Without thermal coal, even the blowers can't run, all kinds of mechanical equipment can't run, and of course steelmaking is out of the question.
"Is one week enough?" Wu De expressed concern. In addition to the Jiazi Coal Mine, which is basically reliable, Sanya, which surrounds half of Hainan Island, Hongji, which crosses the Beibu Gulf, and the coal mines in Guangdong on the mainland, are all in an unreliable state. In comparison, Sanya's reliability The highest, but if something serious happens in Sanya: a serious accident or an attack by a foreign enemy, it may not take a week to completely return to normal.
Ji Wusheng shook his head: "I'm afraid it's not big enough. But I know the current predicament, especially for thermal coal - I heard the gap is huge."
"It's not that big." Wu De told Ji Wusheng in a low voice that the entire Lingao thermal coal reserve only had 9 days of standard coal reserves.
"So few?" Ji Wusheng was shocked, because the thermal coal reserves once reached the standard coal reserve of 30 days after the opening of Nanbao Coal Mine and Jiazi Coal Mine. "Hasn't the coal transportation channel in Guangdong been restored?"
"I've just recovered, but my weight hasn't come up yet," Wu De said.
Guangdong's coal supply has been mostly interrupted since before the Chengmai Battle. Only coal from Leizhou has been continuously transported to Lingao through the operation of Leizhou Station due to its short distance and easy transportation. However, other continental sources have been completely interrupted. . And the best Hongji anthracite arrives intermittently. Very unstable.
"You have to know that now thermal coal has to be transported to Sanya every week, and the appetite there for consuming thermal coal is getting bigger and bigger." Since Wu De became the director of the Planning Institute, his head has gradually become thinner, and his eyebrows have become knotted. "I'm thankful to be able to maintain a reserve of 9 days."
He has been thinking about the plan to occupy Hongji. The temptation of this large open-pit anthracite coal mine is too great. Lingao's industrial system is in great need of such high-quality anthracite that is easy to mine and utilize.
At present, Hongji Coal is operated through the Vietnam Trading Company at Leizhou Station, and the Vietnam Trading Company purchases coal locally through agents. Transport the sugar and get back rice and coal. However, the scale of this trade has never been large.
"Chang Shide and I said that the exchange ratio of trade with Vietnam is quite beneficial to us, but the number of trade goods we can provide is a bit small and the types are also small." Ji Wusheng said, "He said that Vietnam is very interested in small hardware. The demand for military equipment is very large, and there is also a huge demand for military equipment. The Northern and Southern Dynasties were fighting almost every day - on a very large scale."
Wu De thought: The biggest problem with Lingao's products is limited production capacity, and production capacity is related to the shortage of machinery. The crux of the shortage of machinery is of course insufficient steel. As long as we open up the situation on the steel issue, everything will be easier to handle. . ..
