The advantages of the fire cloth are obvious, not only can be insulated and protected, but also once dirty, there is no need to waste detergent, only need to be put on the fire for a period of time, and the stains on it will be cleaned, which can be described as time-saving and trouble-free, very convenient.

However, because the fire raccoon cloth has always been a special material that comes and goes in China, the price is outrageously high, and even, it can not be measured by the price, it is a priceless treasure, so, although the fire raccoon cloth has a very superior performance, but no one will choose to use the fire raccoon cloth to make clothes for themselves, and can not buy this kind of cloth, although the emperor can occasionally obtain the fire raccoon cloth, but also as a treasure to treasure, even, when he dies as his own funeral goods, put into his own underground palace, This caused great waste and made the emperor's descendants question the existence of Huohuanbu.

The root of all this is that for thousands of years in the Chinese Empire, no one has been able to make Huohuan cloth, which has caused the extreme rarity of this cloth, and even only a few people can see it, most people have just heard of it, and Li An naturally knows that Huohuan cloth is the so-called asbestos, a very ordinary material, research and development and manufacturing is not difficult, as long as you give a little research and development time, these materials can be manufactured, and at this moment, asbestos has obviously been manufactured by Li An.

There are a lot of asbestos mines in the west, and within the territory of the Tang Empire, there are also asbestos mines, about in the Shuzhong area, the output is not small, and the ore that Li An used to study the fire Huan cloth came from the Shuzhong area, which was specially searched by the craftsmen according to Li An's requirements, and the asbestos ore was quickly found, and the first batch of mined asbestos ore was transported to Chang'an City for Li An to study.

In fact, asbestos is a kind of natural mineral, from a distance is a strange stone, the most one of the asbestos minerals is called serpentine asbestos, with excellent alkali resistance, almost not corroded by alkalis, but the acid resistance is poor, very weak organic acids can precipitate the magnesium oxide in the asbestos, so that the strength of the asbestos fiber decreases.

There is also a kind of hornblende asbestos, which belongs to hornblende, and asbestos belongs to the monoclinic crystal structure. The color is generally darker, the specific gravity is larger, it has higher acid resistance, alkali resistance and chemical stability, and the corrosion resistance is also better. In particular, blue asbestos has good filtration performance, and has important characteristics such as anti-chemical poisoning and purification of air contaminated by radioactive substances.

The distinction between serpentine asbestos and amphibole asbestos is to put asbestos in a mortar and grind, serpentine asbestos into a chaotic felt mass, the fibers are not easy to separate, and amphibole asbestos is easy to divide into many fine fibers after grinding. Asbestos without iron is white, and asbestos with iron is blue in different shades. The fibrous aggregate is silky luster, and the fibre luster after splitting is dull.

Asbestos is a collection of microtubular-like fibers arranged parallel to each other, which can be split into very fine asbestos fibers, the diameter can be as small as 0.1 micron or less, and it is difficult to observe with the naked eye after complete splitting, so it is a good bacterial filter material.

Asbestos with a fiber length of more than eight mm can be mixed with cotton yarn to make fire-resistant textile materials, and shorter fibers can be used to make asbestos glulam, asbestos boards and insulation. Blue asbestos has unique properties against chemical poisons and purifying radioactive particulate polluted air, and is used to make a variety of high-efficiency filters, and the filtration efficiency of asbestos paper made from it is close to 100%.

The asbestos fibers of vertical fissures are called transverse fibers, generally with a length of less than 30 centimeters, serpentine asbestos is mostly produced in this form, and the asbestos fibers that extend in the direction of parallel fissures are called longitudinal fibers, and their length can reach more than one meter, blue asbestos is mostly longitudinal fibers, and other asbestos fibers are both.

Asbestos deposits occur in ultramafic rocks or metamorphosed dolomites, where asbestos occurs in rock fissures a few millimeters or centimeters wide to form cotton veins, and ore bodies consist of clusters of cotton veins.

Serpentine asbestos is widely distributed, accounting for more than ninety percent of the total asbestos production. It is mainly formed in the contact zone between the intrusion and the dolomite or dolomitic limestone and in the network fractures of the serpentine formed by metamorphism of ultramafic rocks.

Amphibole asbestos is mostly formed by hydrothermal soda and magnesia metasomatization of iron-bearing siliceous rocks under dynamic metamorphic conditions. The largest serpentine deposits are located in the Ural Mountains in the west.

Datang's asbestos resources are relatively scarce, but for the use, it is also sufficient, after all, asbestos has a lot of pollution, easy to cause harm to the human body, it must be limited to a certain extent, for example, many old houses in later generations, the tiles are asbestos tiles, although the price is cheap, it will not be much harm to the user, but for the craftsmen who produce asbestos tiles, the damage to the body is very large, so it is better not to carry out large-scale production, after all, Many materials can replace asbestos, and it is enough for Datang to have a certain amount.

In later generations, the use of asbestos is very wide, more than ninety percent of the asbestos used in the world is chrysotile asbestos, and its fibers can be split into extremely fine elemental fibers, with excellent spinning performance. Crocidolite and amosite account for less than one percent of the total consumption of asbestos, mainly used in shipbuilding, anthophyllite asbestos is a kind of asbestos similar to talc, often used as industrial talc.

Asbestos fiber can be woven into yarn, thread, rope, cloth, packing, etc., as a material or lining for transmission, heat preservation, heat insulation, insulation and other components, and is mainly used to make asbestos boards, asbestos paper fireproof boards, insulation pipes and kiln mats, as well as heat preservation, heat protection, insulation, sound insulation and other materials.

Asbestos fiber can be mixed with cement to make asbestos cement tiles, boards, roof boards, asbestos pipes and other asbestos cement products. Asbestos and asphalt can be mixed to make asbestos asphalt products, such as asbestos asphalt board, cloth (linoleum), paper, brick and liquid asbestos paint, putty for filling cement pavement and expansion cracks, etc., as waterproof, insulation, insulation, acid and alkali resistant materials for high-level buildings and materials for traffic engineering.

Asbestos is bonded with phenolic, polypropylene and other plastics on national defense, which can be made into rocket anti-ablation materials, aircraft wings, fuel tanks, rocket tail nozzle tubes and torpedo high-speed launchers, sound insulation and heat insulation materials in ships, automobiles, aircraft, tanks and ships, asbestos and various rubber mixed molds, and can also be made into sealing materials for liquid rocket engine connectors. Asbestos and phenolic resin laminate can be used as a heat-proof material for the head of the missile. Blue asbestos can also be used as anti-chemical, anti-atomic radiation lining, separator or filter, acid-resistant packing, rubber plate, etc.

Because the fiber of asbestos is soft, it has the characteristics of insulation, heat insulation, sound insulation, high temperature resistance, acid and alkali resistance, corrosion resistance and wear resistance, etc., and has quite a lot of uses in commercial, public utilities and industrial facilities, such as fire-resistant asbestos textiles, water pipes, insulation boards and other asbestos cement products, and various thermal insulation materials are widely used in buildings, electrical appliances, automobiles, household goods, etc.

Asbestos materials are used in all aspects of life, however, in order to ensure the health of craftsmen who produce asbestos, Li An will not study too many asbestos materials, such as labor protection materials, asbestos boots, asbestos gloves, which can be replaced with pure cotton materials, and do not need to be developed, even if asbestos gloves and asbestos boots are developed, they are also used by special groups, such as blacksmiths and firefighters who are often in contact with high-temperature environments, and the rest of the ordinary craftsmen have no need to use asbestos gloves at all. For example, the craftsman who moves bricks can directly use cotton gloves.

In the field of construction, asbestos can be used to make asbestos cement pipes, asbestos cement tiles, asbestos cement boards and various asbestos composite panels and so on.

The performance of these products in heat insulation and sound insulation is very good, but the asbestos material is polluted, Li An will find a way to replace it with the rest of the materials, and will not choose to use the conventional building materials of asbestos materials, moreover, the asbestos materials are also defective, such as the impact strength is relatively low, once it encounters a large external force, it will break and collapse, with a certain risk, in the place where the strength requirements are relatively high, it is absolutely impossible to use asbestos materials.

In the industrial aspect, asbestos is more useful, asbestos can be made into thermal insulation products, boiler outer wall and conduit often used asbestos to make insulation layer, can improve the thermal efficiency of the boiler, reduce heat loss. Insulating steam equipment can reduce the temperature of the workshop, and can also reduce accidents in flammable and explosive departments such as petroleum refining. The refrigeration equipment is insulated with asbestos, which can improve the refrigeration effect. Insulation of boiler rooms for vehicles, boats, etc., will not raise the temperature of the carriage or cabin. In order to make full use of staple fiber asbestos and low-quality asbestos to reduce costs, asbestos is combined with other materials to make the following insulation materials for use in related equipment. For example, magnesium carbonate asbestos powder, diatomaceous earth asbestos mud, calcium carbonate asbestos powder, clay asbestos powder, etc. are relatively cheap asbestos insulation materials.

Li An plans to apply some asbestos technology in the industry, such as the thermal insulation materials inside many machines, which can be produced with asbestos materials, as well as wear-resistant and high-temperature resistant mechanical transmission parts.

As for other applications, there are a lot of them, which require Ang Lee to try slowly, accumulate little by little, and finally make qualified and satisfactory products.

Looking at the Huohuan cloth that Li An took out, Guo Ziyi gently took it, observed it carefully, and rubbed it with her hands to feel the quality of the Huohuan cloth.

"Li Shilang, this thing, is it a fire cloth?"

Guo Ziyi seemed to be a little incredulous, he had never seen Huohuan cloth in his life, he had only heard of it, so he was not sure that the cloth he saw in front of him was Huohuan cloth.

And to check whether the cloth in front of you is a fire cloth, it is also a very simple thing, just dirty this cloth, and then, put it in the fire to burn, and see the result.

If the cloth in your hand will not only not be burned, but also burn more and more cleanly, it is undoubtedly a fire cloth, and if there is no such performance, it is not a fire cloth, which is beyond doubt.

"Li Shilang, why don't we try?"

Guo Ziyi became interested.

Li An glanced at him and asked the scientific and technological talents beside him to fetch the brazier, while he himself took a brush and ink and wrote a few big characters on the fire cloth.

"General Guo, haha! Well written. ”

Guo Ziyi said happily, and looked at the technical talent who was walking with a brazier.

In the brazier was a raging fire, the height of the flames was more than a foot high, and it looked like a raging fire, a great fire, enough to swallow everything.

Li An picked up the fire raccoon cloth with handwriting, threw it in the brazier without hesitation, and let the fire scorch the fire cloth, without the slightest worry, because Li An is confident in his own technology, and he has already done experiments a few days ago, and the fire raccoon cloth can indeed withstand the scorching of large goods, and it will not be burned at all, so there is no need to worry.

When Huo Huanbu entered the fire and burned, Guo Ziyi's eyes kept staring at Huo Huanbu, this was the time to witness a miracle, how could he miss it?

"Oops! It's really not lit, it's amazing! ”

Seeing that the cloth was not ignited, Guo Ziyi said excitedly.

Li An smiled, gently pinched the hot raccoon cloth with pliers, shook it a few times in the air, and after the fire raccoon cloth cooled down slightly, he rubbed it vigorously with his hands to remove the stains on it.

Sure enough, under Li An's operation, the four big characters of General Guo were completely removed, and nothing was left on the huge Huohuan cloth, and the cloth looked very clean.

"General Guo, let's see how it is, if it's the same as new."

Li An said proudly.

Guo Ziyi had an expression of appreciation, thought for a while, and said: "Li Shilang is really powerful, he actually got the Huohuan cloth out, does this Your Majesty know?" ”

"Such a trivial matter, why tell Your Majesty, it is not worth mentioning, it is not worth mentioning."

Li An said with a smile, compared with the Wanli Transsion plan, this Huohuan cloth is really too ordinary, and although Huohuan cloth is not afraid of fire and has a strong application prospect, after all, it is polluting and cannot be used to make clothes, unless it is for a special purpose, such as the lining of firefighters' clothes, which can be manufactured using Huohuan cloth.

But Guo Ziyi obviously doesn't know the harm of the fire cloth, because in the legend of the Tang Dynasty, there is no record of anything about the harm of the fire cloth to the human body, and he is about to boast this object to the sky, how can he belittle it in the slightest?

"Li Shilang, such a good fire cloth is not bad for making clothes for soldiers, so that you don't need to wash clothes often, and when you encounter enemy fire, it won't be ignited, good thing!"

Guo Ziyi said.

Li An waved his hand and said: "This is absolutely not good, the cost of Huohuan cloth is high, and only General Guo can think of it to make clothes for soldiers, it is too expensive, too expensive, no, absolutely not." ”

In fact, Huohuan cloth is not expensive at all, it is much cheaper than the Shu brocade produced in Shuzhong, but it is inconvenient for Li An to tell Guo Ziyi about the harm of Huohuanbu, after all, in the ancient times of the entire Chinese Empire, everyone looked up to Huohuanbu, and Li Ang didn't want Huohuanbu to fall off the altar.