Uglysquirrel wrote:My bulk coal supplier, a sage coal burner for many years, recommended the old custom of throwing ashes on the top of the coal bed to slow the fire.
That is exactly what it is, an old custom. Sort of like throwing dirt on a coffin before they lower it. It does work, but I believe it is really detrimental to the fire, not beneficial. The reason is your placing the ash on top of your fresh coal that is not burning. It will reduce the amount of air that THAT coal gets to it when it does take fire.
No that I think about it, it reminds me of EGR (exhaust gas recirculation) on a car engine. You know, run some burnt stuff through something you are trying to burn stuff in? How well does that work for you? It takes more fuel and has a variety of other issues as well as we all know.