Electric fuel frank

Tile grout removal method? Please Help!!!? - tile grout removal tool

We have a new floor in our kitchen. So far, we have removed the old tiles and we will remove the old joints, which
can set new tiles. The house of the former owner used some kind of automatic level control and content when the grout is aging. What is the best way to remove it?

So far we have:
Grinding - tons of dust
Correction - tons of dust
Chisel - super slow

Please help!

Here are some pictures, we work with are:

like the blur in this case. This is only a kind of idea what the reason is not the tile:

http://i16.photobucket.com/albums/b18/gu ...


Tools:
http://i16.photobucket.com/albums/b18/gu ...
http://i16.photobucket.com/albums/b18/gu ...
http://i16.photobucket.com/albums/b18/gu ...

What you see things as they came from the factory:
http://i16.photobucket.com/albums/b18/gu ...

any help would be very grateful