How is glass made? Don t talk too complicated, about three or four hundred words, don t have too muc

The main raw materials for glass production are glass forming, glass adjusters and glass intermediates, and the rest are auxiliary raw materials. The main raw materials are the oxides, intermediate oxides and extra-network oxides that are directed into the glass forming network; Auxiliary raw materials include clarifying agents, fluxes, emulsifiers, colorants, decolorizing agents, oxidizing agents and reducing agents.

Glass production process.

It mainly includes: raw material pre-processing. The bulk raw materials (quartz sand, soda ash, limestone, feldspar, etc.) are crushed to dry the wet raw materials, and the iron-containing raw materials are treated with iron removal to ensure the quality of the glass.

Batch preparation. Melting. The glass batch is heated at a high temperature (1550 1600 degrees) in the pool kiln or crucible kiln to form a uniform, bubble-free liquid glass that meets the molding requirements.

Molding. Liquid glass is processed into products of the required shape, such as flat plates, various utensils, etc. Heat treatment.

Through annealing, quenching and other processes, the stress, phase separation or crystallization inside the glass is eliminated or generated, and the structural state of the glass is changed.

Raw material composition of glass:

Oxides, alumina, magnesium oxide 5%.

Quicklime 10%.

Sodium carbonate 14%.

Silica 70-72%.

Quartz stone, quartz sand, and river sand are all substances that contain a lot of silica, so they are the main raw materials for making glass.

See glass manufacturing process.

The melted glass is placed on a flat plate to cool down, and it is flat glass.

Melting glass is cooled on a lead solution, which is float glass.

Glass raw material mixing - melting - clarification and homogenization - molding - annealing.

Hans Christian Andersen's ugly duckling has gone through setbacks and finally become a beautiful white swan. Looking back on the past, I found that my experience was very similar to that ugly duckling.

The Ugly Duckling "Since I was in school, every exam has been not slippery, neither high nor low. And I don't know anything about art: **, art, good is b, bad is c, and even the side of a- has not been touched.

Sports are okay, but the endurance is not enough, and I am out of breath when I run more than 400 meters, let alone 600 meters. Over time, he was looked down upon by those top students, and was often talked about by those poor students: "Look at Luo Siyuan, his grades are not so good that he is quite 'ambitious', and he said that he must surpass so-and-so this time, but what is the result?"

It's not ...... yetIt's really self-sufficient! "Alas, the taste of being an "ugly duckling" is really uncomfortable, looking at those "white swans" can only look at the ocean and sigh!

Persist in working hard" into junior high school, and the learning task can't help but increase. At the same time, it is essential to work a daily basis. Mathematics what exercises, test papers, although only.

Although I practice a lot every day, I have no complaints because there is still a big distance between me and the "White Swan", so I have to keep trying. Day after day, the hard work paid off, and I finally became a "white swan".

The seeds of my efforts finally bore fruit. Good news followed: essay fees, scholarships, being named a learning activist. Yes! I finally succeeded. However, I am not proud, because people with a good heart are not proud.

I am a "white swan", but I will continue to work hard and ...... towards the phoenix

Speaking of the ugly duckling, we are all too familiar with it, it is a typical example of rising from a desperate situation; In those days of humiliation, he got up and walked towards his dream.

Ducklings, chickens with sharp beaks, blood from wild ducks, hunting dogs with bared teeth, hunters with guns, stupid hens, haughty cats, and so on, all of which he remembers vividly, and they have played a part in his transformation into white swans.

We are like ugly ducklings, but who of us dares to say out loud that I have paid 100% sweat for the pursuit of success and the pursuit of dreams. I'm ashamed that I didn't work hard and pay for my dreams, and I can't become a white swan in my mind. The rain washed and the warm breeze blows, as if the heavens have changed me.

Yes, I can say that I worked hard and paid for my ideals, but I sweated too little, and I was nothing compared to the ugly duckling, and my unrepentant fate will eventually be nothing. I want to be a famous celebrity at home and abroad, and I don't want to be a mediocre ordinary person. I want to change, I want to pay, I want to work hard!

In the future world, there will be an "ugly duckling", who will be like his predecessors, weathered and hardships, without bowing his head, not giving in, running towards his dreams, tireless, and not afraid of difficulties to become a white swan.

Lu Xun said: "It's not enough to just say, the important thing is to do it." "Yes, anyone can say it, but how many people will do what they say?

This cannot but cause us to think deeply. Tell everyone that success is easier said than done, and the secret is perseverance. "Insistence" what a simple two words, how many great people he has achieved; What a simple two words "persistence" is, and how many people it has ruined!

It's very simple to want to be a white swan, as long as you work hard, as long as you pay; It's easier to want to be a duckling, let you play, people you play. Don't just be happy and ruin yourself, is it worth it?

The present me makes the future me, and the future me waits to check the past me.

On the other hand, when we become white swans, we must not look at anyone, because we have been ridiculed and insulted in the past, so what is there for us to be proud of?

Setbacks can make people fail, make people bankrupt, and lead people to the abyss. But setbacks also cheer people up, make people grow, and make people gain experience that leads to success. Success is always accompanied by setbacks, and life without setbacks is almost non-existent.

A few years ago, the birth of the ugly duckling, in the eyes of his siblings and neighbors, was nothing short of a pollution of the world. Therefore, crowding out and laughing at him together. So, he flew over the fence and escaped from the house.

Years later, I came into the world and brought joy to everyone, and happiness and joy filled my little heart. So, I was immersed in the ocean of love.

I'm glad I had the opposite fate of the ugly duckling.

The spirit of the ugly duckling is worth emulating.

A swan egg of unknown origin, forgotten under the tree, was hatched by a female duck as a duck egg. But it was so ugly, pecked everywhere, ostracized, and became the object of ridicule of all the chickens and ducks, and even his mother didn't want him to stay here.

The ducklings flew over the fence and fled, and the birds fled because they were too ugly.

The ducklings came to a swamp full of wild ducks, where the ducklings rested for a few days. Later, two male geese flew in, and just said a few words to the duckling, only to hear "Crack! Syllable!

Two sounds, two male geese fell to the ground and died. The hunters carried out a large-scale hunt, and the hounds came to look for it, picked up the prey, and found the duckling, but the duckling escaped because the duckling was "so ugly that the hounds did not bite him".

It was getting dark, and the duckling was cold and hungry, and with his weak, thin body, he came to a farmhouse against the wind, and the old master thought he would lay eggs, so he left him, and the duckling ate and drank here, and the days were very moist, and after three weeks passed, the duckling, because he wanted to pursue freedom, told the hen that he was going to go, and then he left.

The duckling is gone. He came to a river, and she would swim in the water and be in the water, and all the animals looked down on her because she was ugly. Autumn has arrived, the weather is getting colder, and the ducklings still don't have a comfortable time.

One night the ducklings saw the white swans, flying in flocks, and the ducklings were not jealous of them, and now she only hoped that other ducks could live with him.

Winter came, and the duckling was so cold that he had to swim on the water's surface, and then he fainted, and a farmer came and took him back, and when the children wanted to play with him, the duckling mistakenly thought that they were going to hurt her, and fled in panic.

Winter has passed, and spring has arrived. The duckling suddenly felt that her wings were strong, and she flew to the flock of swans, and bowed her head in shame, but was surprised to find that she was a swan, the most beautiful swan. But he has no pride, because a heart with ideals, pursuits, kindness, and yearning for beauty and freedom will not be proud!

There are too few words! Can't write that much, so be it! I'll take those two points and go first! Next time, don't make a weak pull!

I don't even know the mile!! ~

It's still good to be in the original (written by yourself)!!

Without thunder and lightning, there would be no rainbow that rains over the sky. Inscription I, living under the care of my relatives, although I have also encountered setbacks, but compared with the ugly duckling, it is simply a small thing, but I can always say when I encounter difficulties: forget it, it's too difficult, don't do it.

Now I understand that there is no success without failure, and success requires a failure to begin. Not only do I have to learn to be patient like an ugly duckling, but I also have to learn to be that strong.

kkidpop |Level.

In the late 20s, Lin Yingzi, a six-year-old girl, lived in a small alley in the south of Beijing. Xiuzhen, a crazy woman who often stands at the mouth of the alley looking for her daughter, is the first friend Yingzi made. Xiuzhen once secretly fell in love with a college student, and then the college student was arrested by the police, and Xiuzhen's daughter Xiao Guizi was thrown by her family under the city roots, and her life and death are unknown.

Yingzi is very sympathetic to her. Yingzi learned that her little friend Niu'er's life experience was very similar to Xiao Guizi, and found Qingji on the back of her neck, and hurriedly took her to find Xiuzhen. After Xiuzhen recognized her daughter who had been separated for six years, she immediately took Niu'er to find her father, but the mother and daughter died tragically under the wheels of the train.

Later, Yingzi's family moved to Xinlianzi Hutong. Yingzi met a young man in a nearby deserted garden. He had to steal in order to provide for his brother's education.

Yingzi thinks he is very kind, but she can't tell whether he is a good person or a bad person. Soon, the patrol arrested the young man, and Yingzi was very sad. When Yingzi was nine years old, her wet nurse, Song Ma's husband, Feng Daming, came to the Lin family.

Yingzi was very sad to learn that Song's mother's son fell into the river and drowned two years ago, and her daughter was also sold to others by her husband, and she didn't understand why Song's mother left her children alone to serve others. Later, Eiko's father died of lung disease. Song's mother was also picked up by her husband on a small donkey.

Yingzi rode the carriage with her family and said goodbye to her childhood with all kinds of doubts.

A little more)

Resources.

In the text? I can't remember ......Anyway, I just remember taking the exam in the final section.

Like a teacher of candles.

The calendar turned over page by page, time passed in a hurry, and "Teacher's Day" came to us silently with light steps.

Some liken teachers to diligent gardeners who take good care of us so that we can thrive; Some people say that teachers are our mentors on the journey of learning, and they are the ones who lead us to the other side of success; It is also said that a teacher is like a machine that never stops working; But I would say that the teacher is like a candle. "The spring silkworm is dead to the end, and the wax torch turns to ash and tears begin to dry" This sentence could not be more appropriate for the teacher. The teacher imparts knowledge to us in obscurity and takes us to swim in the ocean of knowledge.

Like a teacher of candles.

The calendar turned over page by page, time passed in a hurry, and "Teacher's Day" came to us silently with light steps.

Some liken teachers to diligent gardeners who take good care of us so that we can thrive; Some people say that teachers are our mentors on the journey of learning, and they are the ones who lead us to the other side of success; It is also said that a teacher is like a machine that never stops working; But I would say that the teacher is like a candle. "The spring silkworm is dead to the end, and the wax torch turns to ash and tears begin to dry" This sentence could not be more appropriate for the teacher. The teacher imparts knowledge to us in obscurity and takes us to swim in the ocean of knowledge.

Whenever after school, I would always see the teachers still carefully correcting homework and preparing lessons in the company of those electric lights, and even in order to make us understand more thoroughly and learn more solidly, the teacher did not hesitate to spend a long time to make a lot of models. Every tick on the workbook and every red cross embodies the sweat of the teacher. When we have a problem that we don't understand, the teacher will always patiently explain to us, "The teacher's kindness is as heavy as a mountain" and "The grace of a drop of water should be reciprocated by a spring".

Students, don't wait until your career is successful, just today, just day and night when teachers and students get along, we must dedicate our sincere thanks and good wishes to our teachers, so that our teachers can always feel the heat flow of love from students!

They work hard, they are willing to serve others, what are they poor all their lives for? In order to cultivate more high-quality talents for the country, the teachers are an inconspicuous candle, a candle that is silently dedicated at a critical moment, they sacrifice their precious youth, but they have cultivated batches of pillars for the country.

Teachers are selfless, and they deserve all praise.