A chemical reaction called calcination drives the carbon from the limestone, producing lime.

一个称为烧化反应将石灰石中碳驱除，生石灰。

The other half comes from calcination, the chemical reaction that transforms limestone into clinker.

另一半则来自烧过程，即将石灰石转化为熟料化反应。

Then a reaction takes place inside the Kiln known as calcination which produces carbon dioxide is a by-product.

然后在窑内发生称为烧反应，生品是二氧化碳。

Around half the carbon dioxide emissions from cement making come from the calcination reaction alone, the rest coming mainly from quarrying the limestone and heating the kiln.

大约一半水泥生过程中二氧化碳排放仅来自烧反应，其余主要来自开采石灰石和加热窑炉。

Limestone is refined to produce calcium oxide, or quicklime, for cement, in a reaction known as calcination, which releases a lot of carbon in the form of CO2.

石灰石被提炼以生用于水泥氧化钙或生石灰， 在称为烧反应中，该反应以 CO2 形式释放大量碳。