Go get yourself the two biggest brake drums they have at your local junkyard or recycling yard. You also need a couple 18" long, 2" pipe nipples, a 2" end cap, a 2" floor flange, and a 2" tee. You're going to also need a steel drain grate as a clinker breaker and one of these:
https://www.amazon.com/dp/B00H7YL5W4/ref=cm_sw_r_cp_awdb_t1_oPyfDb2TTM2J3
Put one drum on the ground, open end down. Screw the cap onto the first nipple. Use some scrap rod or bar to hold the cap centered on the wheel side of the drum. Put the tee on that nipple and the other nipple on the other side. Take the Amazon bit and screw it into the odd side of the tee. Screw the floor flange onto the top of the second nipple and weld the second drum, open side up onto the flange. Grate gets welded into the inside of the drum and weld up the holes for the lug nuts.
Your blower hooks up to the odd Amazon fitting. Coal or coke goes into the grate side drum.