Destruction demands high heat and the fuel content is scant. Thus we will need to be really creative here. Standing them on end in the center of a bowl allowing additional pieces to be added might sort of work. At least we can produce a burn chimney hot enough to do some good. But likely not good enough.
An actual burn would at least allow recovery of all the metal.
I am getting so tired of waste management politics. There is only one real way forward for all waste. It is to operate what I describe as a double lung incinerator. The first lung or stage works at 600 C which serves to breakdown all carbon based compounds to produce ash and fuel for the second lung or stage. Propane is then added to the second stage to jump the temperature to 2000 C in order to reduce all remaining carbon based molecules to CO2.
Such a system frees up all the inorganics in the first stage for easy compaction and recovery, while all organics become CO2. A third stage can also be added if we have nasties like PCBs.
In this example we need a huge kiln to handle the pieces and a convenient add in waste fuel stream as well to avoid burning a lot of natural gas. Then at least we can crush and compact the metal and fiber for smelter feed.
Fragments of wind turbine blades await burial at the Casper Regional Landfill in Wyoming.
Each blade is cut into pieces for transport and stacked for efficiency.
Until large-scale recycling is widely available, landfills must accommodate defunct blades.