Although the production of fertilizers is required, the tower cylinders of the copper smelter have been in production and have not been stopped for renovation.

However, the sulphur box has already been installed.

After the addition of sulfur boxes to artificially supplement sulfur for reaction, the amount of sulfuric acid prepared has been greatly improved, and the daily output of sulfuric acid preparation has reached more than double that of pure flue gas extraction!

In terms of reducing agents, Deng Fang also changed several kinds.

The sulfuric acid produced when coke was originally used as a reducing agent was the same as ink, but after the adjustment of the reducing agent, the color of the sulfuric acid has been greatly improved, and it has obviously had a certain degree of clarity.

"Although the sulfuric acid prepared by the reducing agent is much better than the sulfuric acid prepared by coke as the reducing agent before, the impurity content is still too high, and I still have to ......adjust the reducing agent," Deng Fang finally said.

"Hmm!"

Zhang Ran nodded and instructed: "Try not to delay the preparation of sulfuric acid while adjusting the reducing agent, after all, our current territory has expanded too much, and after a while, Xu Song will be driven away, the fertilizer produced by our detachment will not only supply our Dongjiang and Cangshui, but it is estimated that a part of it will be reserved for the Yangquan Lingjiang side, and a large amount of sulfuric acid will be required - although it is very important to make high explosives as soon as possible, but the safety of food is the top priority!" ”

Although weapons and ammunition are always the ones who determine the success or failure of this war, in Zhang Ran's heart, food always comes first.

If you can't eat enough on your stomach, what will you do to fight?

Not to mention, in the battle of Yangquan, the local people are all brave, heavy casualties, and a large number of laborers, if you don't support a part of the fertilizer in the past, to help the people increase production and income, Zhang Ran is really afraid that the local people will cause famine because of the loss of labor!

Thinking about those brave men who spared their lives, but the orphans and widows left behind after the battle died starved to death because they had nothing to eat, Zhang Ran didn't want to see this kind of tragedy that made the heroes shed blood and tears.

After chatting with Deng Fang about sulfuric acid, he asked Xu Jiunian if he was honest for a while, and Zhang Ran had the time to pick up the account book that Wang Changtian cleaned up with the help of Deng Ying, and carefully understand the harvest of this trip.

The detachment went out this time and participated in three major battles.

Annihilated Duan Changdong's Cangshui Self-Defense Force, Tiger Kill Pass blocked Miura, and Wei Jiapo united with local people and guerrilla forces to annihilate the Ikeda Squadron in one fell swoop.

In the two battles of Tiger Kill Pass and Weijiapo, a total of more than 1,500 people were annihilated by two squadrons of the Japanese army plus the puppet army.

However, the capture of Weijiapo has almost all been assigned to Lingjiang and Yangquan, two guerrilla units led by Sun Hongzhong and Tu Jinjun respectively, and what really made the detachment gain a lot was Duan Changdong's Cangshui Self-Defense Force and some of the equipment in the Tiger Killing Mouth Battle.

In the hands of the Cangshui Self-Defense Force, the detachment seized more than 400 guns of various types, scrapped two grenadiers, and seized more than 600 guns of various types and countless bullets and grenades at the Tiger Killing Pass.

The vast majority of the detachment has now been replaced with 38 big covers, and many of the 38 big covers that were destroyed by the little devils captured at the Tiger Kill Pass are now being repaired, and it is estimated that it will not take much time, at least the three platoons on the detachment side plus the independent company, and there is no problem with all the 38 big covers.

The remaining guns of all kinds not only armed a battalion of the Cangshui team, but also the detachment to recruit another company of troops, there is no problem at all!

Not only that, but the remaining old guns and singles are enough to equip the militia in the base area and Cangshui, so that they can be familiar with the performance of the guns and master certain shooting skills.

Although there are a lot of guns, ammunition is still an important bottleneck for detachments and detachments.

In these three battles, the Japanese puppet army and landlords who were annihilated were 17,800 people, and countless weapons and ammunition were captured, but after a few battles, the consumption of various ammunition was also extremely huge!

The bullet casings brought back a lot of them, but in terms of live ammunition, the detachment and the Cangshui team combined were only about 30,000 rounds.

If it is at the level of more than 100 people in the previous detachment of four platoons, and more than 30,000 rounds of ammunition, it will definitely make the detachment feel free for a while!

It's a pity that the detachment's stall is too big and too open!

The Cangshui team alone has a battalion of 500 people, and although only three platoons are left on the detachment's side, an independent company has been added, and a company is ready to be expanded next, that is, two companies plus three platoons, and it will be close to the strength of a battalion at that time!

Two battalions, a thousand people, and the militia of the detachment Cangshui, since the militia was given guns, so much and more or less had to be equipped with a few bullets.

In this way, there are only about twenty rounds of ammunition on each soldier!

Zhang Ran began to pull his hair again, and now he has a terrible headache when he mentions the bullet, and he said in his heart that this pure sulfuric acid doesn't know when it will be prepared.

Even if you get some of it first, let yourself get out of the thunder mercury first, and get the reloading bullet production line out first!

After all, Zhang Ran estimated that there were not 100,000 bullet shells looted back in the warehouse, but more than 80,000 early!

As long as the bullets can be reloaded, then the tightest rope that has been strangling the neck of the detachment will be solved!

Although reloading bullets have such and such shortcomings, no matter what, they are better than nothing, right?

In addition to guns and ammunition, the most important gain of the detachment this trip was the grenadier and the crooked handle made by Fengtian.

Two crooked handles, one of the Cangshui team left, and one returned to the detachment, and the grenadiers captured in the first battle of Weijiapo were also handed over to the detachment, after all, the two scrapped grenadiers in the warehouse of the Cangshui Self-Defense Force had already been sent back!

As soon as the detachment went out for more than a month, the base area has not been idle.

Mao Zuan has experimented countless times on how much of the amount of good medicine removed from waste shells and bombs is added to the black powder, so as to maximize the power of grenade mines while using as little good medicine as possible, and has made some progress.

In the second workshop, in addition to the successful bearing experiment and installation on several chicken buses, some problems in the bearings that have been produced are still being improved, and the two scrapped grenadier canisters sent back by Ren Haifang from the Cangshui Self-Defense Force are also being studied.

Scrapped grenadier parts can be made in a cattle blacksmith's shop, and even handmade grenadiers can be made.

But Cheng Dongshan, Cui Sanyuan, and Niu Da are obviously not satisfied with this!

After all, it can be made by hand, but that time to shoot a grenadier canister, the efficiency is too poor!

What Cheng Dongshan and their second workshop are doing now is to combine the manual work of the blacksmith shop with the machinery of the second workshop as much as possible to reach a level that is sufficient for mass production.

Once the grenadier can be mass-produced and equipped to the detachment, or even the ranks of the Eighth Route Army, the impact on this war will be too great!

The current lack of artillery fire in our army has reached a shocking level!

Not to mention the detachment, take the independent regiment in Puyuan as an example, all the heavy weapons of their regiment add up, there are only two heavy machine guns plus seven or eight light machine guns, and there are only four or five grenadiers, and at least half of them must be brought from the brother troops, and they will have to be returned in the future!

You know, this is the most elite independent regiment of the Eighth Route Army!

And the equipment of the ordinary Eighth Route Army is estimated to be far inferior to that of the central part of Puyuan, which shows how poor our army's equipment is!

Therefore, when our troops clashed with the Japanese positions, most of them had only two means of attack, either shooting or throwing grenades!

But on the other hand, the Japanese army, a brigade of more than 1,000 people in Hikari Yoshinobe is almost the strength of a regiment, equipped with heavy weapons, more than a dozen heavy machine guns, dozens of light machine guns, more than 50 grenadiers, and several mountain guns!

These equipment not only allowed the Japanese army to make full use of its equipment advantages on the battlefield to crush our army, but also greatly enriched the Japanese army's means of attack!

Although the grenadier is far from being able to compare with the mountain artillery and other artillery fire of the little devil in terms of attack distance and attack power, compared with the strength of the grenade and losing fifty or sixty meters, whether it is the attack distance or the attack accuracy, it is much stronger!

Cheng Dongshan and others are obviously aware of this.

Therefore, as soon as Ren Haifang sent back the two waste grenadiers seized from the Cangshui warehouse, he began to repair them, and at the same time tried to see if they could be imitated and mass-produced.

But at present, there is no problem with the repair, but mass production is definitely a long way to go.

Thinking of this, although Zhang Ran was not satisfied, he also had to admit that this trip directly improved the strength of the detachment!

Not to mention the newly established detachment in Cangshui, and not to mention the change in the number of people after the expansion of the detachment!

The detachment now has machine guns, even if it is difficult to make grandma's Fengtian crooked handle - but after all, it is a machine gun, isn't it?

The grenadier is also available, although according to the understanding, this grenadier is not repaired now, but that is also a matter of time!

The grenadier shells were made with grenades from little devils, and it is estimated that this detachment will not be able to make them in a short time.

But after knowing that Cangshui had two broken grenadiers, Zhang Ran had already paid attention, not only were all the grenades captured by the Japanese army at Hujiakou not allowed to be used, but even those grenades in the first battle of Weijiapo, he only left the number of grenadiers for Tu Jinjun and Sun Hongzhong to supply them for a certain period of time, and the rest were exchanged for grenade mines provided by the detachment.

Now there are more than 300 grenades that are used as grenadier shells, which is enough to use for a while!

That is to say, now the detachment, in case of encountering a devil, not only has the accurate shooting of a good gun to meet the famous onboard charge of the little devil, but also has a crooked handle made by Fengtian to suppress, and a grenadier canister to strike a slightly longer distance curve.

The means of dealing with it are more than double that of the past!

"And Lao Tzu has brought back so many gasoline barrels!"

Zhang Ran thought of the gasoline barrel, and then thought of the situation where Yoshino didn't attack at all, and used mountain artillery to bombard himself and others who were waiting for him and others, which was a meal of grinding his teeth, and said stupidly: "Yoshino, you wait for Lao Tzu, and when Lao Tzu finishes the experiment of the conscience cannon, the famous flying thunder cannon is born, and Lao Tzu has to let you taste what it is like to be washed by a cannon-bombardment can't kill you, Lao Tzu Zhang Ran has your surname ......."