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Why do steel balls explode when put into boiling hot oil?
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At 7: 45 a.m. on April 18, Wang Guoxin, the monitor of the electric furnace of Liaoning Tieling Qinghe Special Steel Co., Ltd., was indirectly calling his wife in the steelmaking car. Suddenly, he heard a loud noise, and the ladle containing 30 tons of molten steel fell to the ground, and the molten steel flowed into the adjacent conference room. All 32 people in the conference room were killed, and their identities can only be identified by DNA. Intern reporter ◎ Yang Lu

1500℃ ladle

At 7am on April 18, Zhang Xiaoliang told his wife that he would not have breakfast at home, and then went to work in the factory as usual. Zhang Xiaoliang is a crane operator in the steelmaking workshop. His hometown is Niejiagou Township, Qinghe District, which is 0/00 Li away from the factory/kloc. Due to the low income from farming, in June 2006, he came to work in Qinghe Special Steel Co., Ltd., which had just been put into production. Zhang Xiaoliang is very popular, likes to make friends, and has a good relationship with the workers in the class. Therefore, although it is very hard, going to work is still a happy thing.

At about 7: 40, Class C, who worked all night, made the last casting before leaving work. Zhang Xiaoliang and other workers from Class A also came to the workshop to make preparations before work. Traditionally, before the handover of two classes, a team meeting should be held to explain the work and emphasize safety. Ingot worker Wang Jianwei did not attend the meeting. He came down the stairs of the workshop, but he didn't stand firm when he heard a ding. Then the heat wave hit, and Wang Jianwei tried his best to escape.

Later, Wang Jianwei learned that the loud noise was made when the ladle full of molten steel landed. Spoon is a barrel container with a slightly wider top and a slightly narrower bottom. Although its surface is steel from the outside, its lining should be a kind of heat-resistant material called Al-Mg-C brick, because it contains molten steel at 1500 ~ 1600 degrees Celsius.

At that time, crane driver Zhu Lianwei was slowly putting down the ladle containing 30 tons of molten steel for casting. However, the ladle containing 1500 degrees Celsius molten steel fell from the air, white molten steel flowed out, and viscous molten steel poured into the conference room not far from the ingot pit from the door. /kloc-the high temperature of more than 0/500 degrees Celsius made it impossible for workers who were in a meeting to get close, so they had to turn to the window and escape from the corner away from the door. At this time, the heat wave and hot air of thousands of degrees Celsius emitted by molten steel filled the whole meeting room, even if it was not in direct contact with molten steel, the temperature was enough to kill people. 1500℃ molten steel, like boiling oil, cannot be cooled with water, otherwise it will cause explosion. Rescuers could not get close to the meeting room immediately, so all 32 workers, including Zhang Xiaoliang, were killed.

Different from the familiar red steelmaking scene, the higher the temperature of molten steel, the greater the brightness. Steel at 1200℃ is pale yellow, and above 1500℃ it becomes liquid white molten steel. When the temperature reaches more than 400 degrees Celsius, the cement will become dregs, and the steel water above 1500 degrees Celsius will flow through, and the floor of the factory building will be destroyed.

Workers involved in handling the scene of the accident said that the density of the human body was lower than that of molten steel, and the bodies of the victims floated on the solidified steel cake, and the parts in contact with molten steel had melted. "The most bodies were found in two corners of the conference room, packed in 32 numbered bags." Some of these remains are only about 1 m, weighing more than 20 kilograms, which is completely unrecognizable. Only with the help of DNA technology can relatives find their husbands and sons.

At noon on April 18, relatives began to receive news of their family's death. Zhang Xiaoliang, 29, has a daughter who is less than 3 years old. The little girl still can't understand the pain of losing her father, while his young wife just shed tears and couldn't say a word.

Dislocated conference room

"I never thought I would drop it." Wang Jianwei, one of the six injured, shook his head. Wang Jianwei, 39, has been working for 20 years. Unlike her fair skin, Wang Jianwei's face is black and red, and all her fingers and nails are as black as engine oil. When he said this, he was still in the second phase of anti-shock treatment. In order to facilitate observation and treatment, doctors can only use some analgesic measures appropriately, and Wang Jianwei almost has to bear the great pain caused by burns on his own will.

In fact, the casualty accident is not the first case in a special steel plant. "Last year, a relative's child was crushed to death by a crane, and the loss was 1.5 million. The family arranged work." Master Chen of the grocery store said.

On June 9th, this year, 65438, the factory carried out 100-day safety and accident-free activities in the workshop. /kloc-if there is no accident within 0/00 days, the company will reward the workshop safety bonus 10000 yuan. Contrary to the high reward, if personal accidents or mechanical equipment accidents are caused, the relevant responsible persons will be severely dealt with, not only the 100-day safety accident-free bonus will be cancelled, but also a fine of 1000 to 5,000 yuan will be imposed.

April 18 is 99 days from June 65438+1October 9. The steel-making workshop where the accident happened is the most striking building in the factory. It is wide from north to south and long from east to west, slightly higher than the three-story gray office building outside the factory. The blue background above the west side says safe production and efficient innovation. Below the gray, it says, "Carry out a hundred days of safety and accident-free activities, and work safely in the steelmaking workshop for ×× days", and the number is empty.

The conference room where 32 workers were killed is next to the VD vacuum furnace. In fact, this conference room was built on the basis of VD vacuum furnace. The VD vacuum furnace in special steel plant is supported by six columns, of which four columns near the ingot pit are enclosed to make the room.

In the process of steelmaking, VD vacuum furnace is the main equipment for smelting special steel. Removing impurities in molten steel in vacuum furnace can improve the quality of steel. After refining in VD furnace, the ladle is lifted by crane and then moved to the ingot pit. Then the molten steel is poured into the ingot pit through the funnel-shaped device, and the assembly line operation in the steelmaking workshop is basically finished.