Boiling roasting jishu also has a relatively obvious disadvantage, that is, the pollution is large, especially a lot of dust, but Hu Weidong cleverly recycled all of it, not only to reduce pollution, but also to increase the output, the concept of recycling is also enlightened in China. With the help of this new jishu, coupled with Hu Weidong's perspective of preparing for war, he did not blindly pursue the profit margin of the product, and mainly invested in the construction of small and medium-sized sulfuric acid plants with high production costs but could quickly form production capacity, which made the sulfuric acid output in the western Henan Soviet District increase rapidly, and it soared to more than 30,000 tons in 36 years (the highest annual output during the Republic of China was 180,000 tons, and before Fan Xudong's Yongli Ning plant was put into operation in 37 years, it was only tens of thousands of tons.) By the outbreak of the Anti-Japanese War in 37, the annual production capacity exceeded 150,000 tons, and all of them were underground

However, sulfuric acid is easy to do, and synthetic ammonia is much more troublesome, mainly because the required pressure vessels and thermocouples to measure high temperatures have to be imported, and without the raw material of synthetic ammonia, there is no way to talk about the independent production of nitric acid, not to mention the catalyst platinum rhodium alloy required for the production of nitric acid is also difficult to buy in China.

But more troublesome, or steel and power industry, alloy steel is easy to solve, tungsten and other rare metals Red 15 Army has been looted in the past few months, even if the output of alloy steel is not enough after the increase, you can also use the plane from Jiangxi continuous transfer to transport, anyway, the amount is not much, and the metal antimony that is basically not produced in the north is also easy to solve, in addition to the Red 15 Army before the collection, Guizhou warlords have issued a large number of antimony coins, send people to spend some effort to buy a large number of on the line. In contrast, ordinary steel is more troublesome, because the demand is much larger, and it is impossible to meet it by grabbing alone, and it is unlikely that the underground organizations in the white area will be transported so much.

In view of this, Hu Weidong also took into account that there are not low reserves of iron ore in western Henan (the proven reserves in later generations are more than 100 million tons, and the grade is considered rich in iron ore in China. Although because the underground space cannot be compared with the ground after all, these steel plants cannot be built too big, but because of the use of coking and blast furnace gas recycling jishu and oxygen top blowing converter steelmaking method beyond the times, the one-stop process of coking-iron-making-steelmaking has been realized, and the production efficiency has increased exponentially, and the steel output in the Soviet area of western Henan has exceeded 50,000 tons in 37 years, accounting for more than half of the total steel output in China. However, due to the lack of industrial oxygen concentrators that produce oxygen in large quantities by cryogenic method in the Soviet area, many times it is necessary to replace oxygen with high-pressure air, which seriously affects the quality of steel, but this is also a helpless thing

The importance of electricity is not under steel, but if you want to greatly increase the amount of power generation, it is even more difficult, because there are no generators produced in China at all, and most of the generators sold to China by foreign countries are very small power models, and the industry of Henan Province during the Republic of China is extremely backward, and it is estimated that the power generation in other parts of Henan is not as good as the Gongxian Arsenal, even if you go out to grab it, you can't grab many generators, so you can only buy it abroad. However, Wang Guosong, director of the Department of Electrical Engineering of Zhejiang University, who had been forced to follow the Red 15th Army all the way, learned that Hu Weidong was going to build a power plant, and his eyes lit up, and he said on the spot that as long as Hu Weidong could provide necessary materials such as copper wires and magnets, he and his students would be able to build usable generators, and Hu Weidong immediately readily agreed. But a month later, seeing the "generator" with an installed capacity of less than 50 kilowatts, Hu Weidong couldn't help but be speechless for a while, but he also knew that this was not Wang Guosong's incompetence, but the extreme lack of equipment and materials, and the serious lack of Jishu workers in this area.

In addition, it is worth mentioning that the permanent magnet generator used by Wang Guosong suddenly reminded Hu Weidong of the rare earth permanent magnet materials of later generations, especially the "king of permanent magnets" NdFeB magnetic materials, if this kind of permanent magnet material is used in the generator, then even the permanent magnet generator with power is difficult to make it bigger can exceed 3000 kilowatts, at this time, the advantages of small size, low cost and rapid production of permanent magnet generator are highlighted, which can greatly accelerate the electrification process in China. But thinking that no one in China has even developed rare earth mines, Hu Weidong thinks that this matter should be postponed, "It is really not easy to build a complete industrial system from scratch!" ”…,

In addition, Hu Weidong actually wanted to start the petrochemical industry, coal chemical industry, and other industrial sectors, but considering the current conditions, he still had no choice but to put it on hold for the time being, and instead used local resources to develop phosphate fertilizer, potash fertilizer, and other civilian industries that are greatly beneficial to the people's livelihood.

As early as the first day of the occupation of the Gongxian Arsenal, Hu Weidong found that the product structure of the factory was very unreasonable, not to mention anything else, just the monthly output of more than 40,000 rounds of mountain artillery, field artillery and other howitzers used in steel shells (mortar shells are cast iron), how much labor, how much metal and explosives to consume? However, the Gongxian Arsenal was unable to produce barreled artillery (75mm, 105mm and 150mm) that fired these shells. Isn't this a waste?

Of course, Lao Chiang's arrangement may be out of the consideration of a game of chess for the whole country, but once the war against Japan starts, the production mode of multiple arsenals scattered throughout the country will be responsible for a part of the product, and even if only one is occupied or destroyed by the Japanese, there will be a huge gap in the supply of weapons and ammunition, and it will be impossible to find a replacement in a short time (so Lao Chiang concentrated the arsenal in Chongqing before and after the war, but the cost of transportation and the loss on the road are really not a small amount, For example, the one in Guangxi was half destroyed. ）。 And for the Red Eighth Army, which has only this one arsenal, this product structure is even more fucked, take the 105mm grenade as an example, the Red Eighth Army now does not have a single 105mm cannon, and the production capacity of 14,000 shells per month is of no use at all

In addition, many of the products of the Gongxian Arsenal also have problems themselves, such as Hu Weidong actually saw the names of phosgene and other poisonous gases in the production of the "new factory". Well, just assume that Lao Chiang is taking precautions, these poison gases are intended to be used against the Japanese army and not against the compatriots, but how effective can these poison gases during the First World War be for the Japanese troops equipped with gas masks? Besides, with the level of equipment and ammunition supply of the national army, it is really better to produce conventional guns and ammunition with all its might, rather than wasting production capacity to produce poison gas