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First stage
It starts in the mine or quarry , where it´s obtained . In nature is a rock with ____________________ , ____________________ , ____________________ and other ____________________ .
1 . The ____________________ are removed in the first part of the process , when the ____________________ is separated from the ore .
2 . - The mineral is ____________________ to remove ____________________ .
- It´s ____________________ into ____________________ .
- The ____________________ is ____________________ , and then , again separated from the ____________________ .

Second stage
The next materials are added in the blast furnace :
- ____________________ : is a fuel whith few ____________________ and high ____________________ content , usually made from ____________________ .
- ____________________ : a sedimentary rock consting predominatly of ____________________ ____________________ .
- ____________________ : the usable part of the rock of iron .
The hot is injected from ____________________ at the bottom of the furnace , this way , the reaction is acelerated and the temperature rises higher ( over ____________________ ) .
The lower part of the blast furnace is called ____________________ . Molten minerals precipitate on it .
____________________ ____________________ acomulates at the botton and the ____________________ stays above it . They are separated , the ____________________ ____________________ is the usable part .
The ____________________ ____________________ usually cool in ____________________ , after , they are transported to steel companies .
But there's a problem : The ____________________ ____________________ contents too much ____________________ and ____________________ in the composition . Needs to reduce them before becoming steel .

Third stage
- ____________________ is added to the ____________________ ____________________ .
- ____________________ is injected in order to burn the ____________________ and eliminate the ____________________ .
- After , ____________________ is remove . And the liquid steel is ready to get the final shape .