You are confusing Lightroom with Camera raw, to use your raw files you need to import your images into Lightroom.
Lightroom will read your raw files and allow you to do processing on them.
Note - Camera raw is not an option in Lightroom menu.
Hi Rohit thanks a lot. I need only to know if eventually I can use camera raw independently from Lr
You can not.
The only way round would be to use Photoshop but then again you will need to go through Photoshop to use camera raw filter.