One of the common misconceptions is that high concentrations of oxygen lead to hotter fires by default; it's actually fairer to say that high concentrations of oxygen lead to faster fires by default, but that in turn can create a hotter fire in certain circumstances.
Take a look at this oxygen enriched fire safety article which talks about this in great detail and you will note that on page 5 there is an example of them literally detonating a cotton shirt in an oxygen rich environment. Sure, in a case where you trap the oxygen and have lots of fuel ready to burn in an enclosed space, your fire will be hotter because so much more of the heat energy is released by the chemical reaction in fire all at once. And in this vein, the important point is this:
Fire, even in an oxygen rich environment, is still a triad of conditions;
You need all three to create fire, and the heat of the fire will depend on the density of all these three components in proximity. The Carboniferous period ensured that the availability of the Oxygen is not the weak point in the triad, but you still need heat and fuel. I'd imagine that if you put a lot of dense wood, tightly packed, together in a single small area and set it alight, you could gather temperatures close to what you're describing for a short period, but like all things there is only so much fuel to be burned in this scenario and in achieving higher temperatures for your fire, you're burning your fuel faster. I suspect you'd be able to do it, but you'd need a lot of fuel, and people loading more wood onto your fire pretty much constantly.
Remember, energy is measurable, and we know how much heat energy can be released from wood through fire. If your fire is hotter, made possible by increased concentrations of oxygen, it's only because your wood is burning faster, meaning that a wood fire of (say) double the heat intensity will still need double the amount of fuel to maintain for the same period of time.