I used to take it for granted that the ice sculptures in Harbin were large ice cubes made of ice machines. Then I saw this picture last year, and there were fish frozen in the ice?!
Source: Harbin Daily
After searching it, it turned out that we don't produce ice, we are just nature's porters. And the ice bricks of the ice and snow world are all from the Songhua River~ Let's take a look at how to pick ice on the river today~
Draw lines and cut into pieces
Ice mining must wait until the ice on the surface of the lake has become thick, usually more than 30 centimeters. On the surface of the Songhua River in the icy and snowy area, the ice pickers began to pull the line to measure the distance to determine how to cut the ice later.
First, use the ice cutter to walk around the ice surface and cut the ice surface into small pieces. According to the news, a piece of ice is about 1.6 meters long and about 80 centimeters wide. You can see that the front wheel is a circular saw, which has been cut into the ice.
Let's look at the details, the circular saw is still more than half exposed on the ice, and the cut is not very deep. After all, if you cut too deep, if you stand on it, the ice will crack, and that's too dangerous!
This tangent is about half the thickness of the ice, and then we will continue to dig on this tangent!
Artificial ice flicking
The ice miners continue digging at the tangent with their tools. This ice-harvesting tool also has a special name called the ice hammer (cuān).
This group of ice pickers wore non-slip and cold-proof equipment, sang the ice picking trumpet, "The wind blows the snowy day, pick the ice", and with all their efforts, the ice cracked! Several people working together not only increase their momentum, but also take care of each other.
Divide the ice
Then came the most dangerous and important step, the ice splitting! Small Xiaoice row, the middle reaches of the river~ standing on the floating ice, dividing the ice into blocks, and then moving the separated ice blocks in front of it, and continuing to divide the ice.
Splitting the ice while retreating not only tests your skills, but also keeps your body balanced, and you don't plant yourself in the water with one force.
Ah, the piece on the left below was accidentally filed.
I can't help but think of the penguin icebreaker game, sometimes when you knock on the ice, you pull the whole body, and all the ice cubes fall down...
Hook ice
Once the ice was divided, hook them onto the conveyor belt. Ice Cube: Help me get up!
When the ice floats in the water, we look at it as a thin layer. Now the thickness dragged up, you can feel that it is a behemoth of seven or eight hundred catties, right?(The ice layer must be at least 30 cm thick, that is, the minimum of a single piece of ice must reach 160cm*80cm*30cm*0.92g/cm 3=353.28kg, which is about 700 catties, oh! Remember the saying: The icebergs that people usually see are only a small part of the iceberg that is exposed to the sea, and most of it is hidden underwater. It is known that the density of ice cubes is 0.92 of water, so the exposed ice accounts for a fraction of the entire ice cube~
Put on the automatic conveyor belt and ascend the throne!
As for why it is so clear, because the running water can prevent bubbles from freezing inside, so that the ice cubes formed are transparent.
Loaded in the car and run to the vast ice and snow world~ How to build the "Ice and Snow World" next, it is not in the three bags in front of our door...
Wait! I have something to say...
In fact, many cold countries or regions will have ice mining activities. The song "Frozen Heart" at the beginning of the movie "Frozen" is the ice mining horn of the ice miners~ Although I remember "Let It Go" more deeply, this opening is also very attractive...
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Source: Interesting Manufacturing
编辑：Tensor Spicy