The limestone crusher a few miles from my home can’t use more than 400-500 kW/hr judging by the power lines.

That is limestone, the article talks of basalt which seems would require more.

kW-hrs/hr, I presume you meant. Which is to say kW.

Fortunately, rocks can be crushed with power from solar panels. There remains the issue of whether those panels are better used, just now, to displace natural gas burners emitting new CO2 than to crush rocks to absorb CO2. Or, equivalently, if NG-generated power used to crush rocks makes more CO2 than would then be absorbed by the rocks.

In a near enough future, it won't matter, because the NG will all have been displaced already.

People used to do it with hammers.

They still do. I saw little kids on the African continent doing it recently.