真是版钢铁是怎样炼成的

无论是摩天大楼还是普通的小汽车，钢无处不在。钢铁是一切工业的基础用料，所以，今天我们一起来看看钢铁是如何炼成的？

钢铁是从铁矿中提炼出来的。在炼钢过程中铁是很重要的一个组成部分。把铁在高炉中加热，加入其他的化学物质，就会得到被称为pellets的管状物。

这些pellets才仅仅是开始。

blast furnace：炼钢炉
blast furnace is a type of metallurgical furnace used for smelting to produce industrial metals, generally iron.

参考文本：

I'm Eunice Yoon in Hong Kong.

Steel, it's using everything from skyscrapers to cars. It's foundamental to every working economy. So I thought I'd show you, how it's made.

Iron is the key component in making steel. It's extracted from iron ore. The ore is heated in a blast furnace, together with various chemicals. And the results is a raw version of steel which is fashioned into rods called pellets.

These are pellets. This is the starting point. This is Hong Kong Steel Mill each one with two times. The pellet is brought here to the furnace where they are heated up to a thousand degree celsius so that they become more valuable and moded into any shape.

The bars go through these rollers. And as you can see, they get narrower and narrower. The finished ones that they made here are ten millimeters in diameter.

By this time, the bars are cooled down. They've been sprayed with water, a hard casing was formed on the bar to make it strong. But they are still 600 hundred degrees, pulled down even further and laid down on this platform.

These are reinforcement bars, the kiameter used to build highways and bridges. Each one is cut into a 12-meter long piece which is an industry standard. These steel can turn out eleven thousand of these bars every hour.

The bars are bundled and stored for 3 to 6 months before they're shipped up to construction sites all over the world.