How does domestic coal ash compare to this stuff? Do the higher temperatures and pressures in power station liberate more of the harmful stuff, or is it basica

How does domestic coal ash compare to this stuff? Do the higher temperatures and pressures in power station liberate more of the harmful stuff, or is it basically as bad? UK homes were commonly coal heated as late as the 1980s, a few still are. Its contribution to air pollution was well-understood, but this has got me wondering about ash exposure, as people would routinely handle the stuff with basically nothing in terms of protective gear.