Maybe ice cube trays?
I can see why cement would be a problem. The idea with corn starch (or flour) is that the binder will burn up with the coal.pat1027 wrote: ↑Sat Dec 08, 2018 3:48 pmOne of our club members tried a mix using cement as a binder. He had didn't have much success. Poor burning and lots of crud in the firebox. Coal dust bricks are widely used in China for cooking and home heating. This article talks about charcoal briquettes but it might be useful.
I think one's location and needs would determine the worthiness of reclaiming coal dust for use. While the folks on the east coast appear to have a ready supply, it is getting nearly impossible to buy in many areas, so a little effort to reclaim what, otherwise, might be discarded may be well worth the effort.
Interesting story. Could you separate the different metals from each other too?Harold_V wrote: ↑Sun Dec 09, 2018 1:47 amI think one's location and needs would determine the worthiness of reclaiming coal dust for use. While the folks on the east coast appear to have a ready supply, it is getting nearly impossible to buy in many areas, so a little effort to reclaim what, otherwise, might be discarded may be well worth the effort.
When I refined precious metals, I accumulated a serious amount of waste material, in which one would find silver, gold, platinum and palladium, along with copper and traces of other base metals. This material, for all practical purposes, looked like a light colored dirt. To chemically process these wastes would be less than productive, but if they could be processed in a furnace, where the base metals and silver would act as a collector for the values, they were well worth processing. To that end, I experimented with various flux combinations and was pleasantly surprised that when mixed with water, stirred, and allowed to set, the resulting mixture formed hard cakes, which was a definite advantage to the recovery process. That prevented losses of values by dusting in the furnace, and made handling the waste material much easier. I was well rewarded for my efforts, as these values were extracted and financed my early retirement.
I'm not trying to equate the coal with the values I extracted, but the principle is much the same, and there's always a good feeling of accomplishment when such projects are successful. I say go for it!
My experience is that the “coal briquettes” do break up as they burn. So does bituminous (soft) coal to varying degrees. Some soft coal pops apart as it catches fire, so even if big lumps are tossed in, they readily break apart on the grates. Anthracite doesn’t do this. It just burns away until it is ash.
Yes, which is precisely what a refiner does. The resulting metal (from the furnace process) was similar in appearance to pale yellow brass. It was comprised, primarily, of silver, as the waste material in question came from filters, and silver chloride is very much a part of the waste that is eliminated before the recovery of greater values. The values are separated (after being dissolved in acid) by selective precipitation.