Is there any concrete that will work for a prolonged time at a temperature of 2,200°F?
At such a high temperature the best choice would be a concrete made with high alumina cement. Such concrete loses strength during exposure to high temperature, just as portland cement concrete does, but from about 1,300°F upward it begins to undergo solid reactions that create a ceramic bond to the aggregate. If crushed firebrick is used as aggregate the concrete can withstand temperatures up to about 2,450°F and with certain special aggregates up to about 2,900°F.