I do not really understand all this ? He need gloves for protection from high radiant-heat , when he open door of oven ? What is benefit if gloves are rated to 2000 degree when my skin will burn under that kevlar ? Gloves with aluminized back reflects up to 95% of radiant heat ???
It's not just the radiant heat that's the concern here. It's the hot hair, the hot kiln body, the hot work, and the hot tongs. Yes, the 2000 degree gloves are extreme overkill, there are kevlar gloves in much lower max temp ranges than that, I'm just giving a "top of the line option". With those, you could literally grab the work with gloves if you needed to, and I've had occasion where that was necessary.
Also, not sure what you're talking about describing your skin burning under the gloves, even IR, or any other normal heat source will still be absorbed by the gloves. We're not using microwaves to heat billets are we?
There are nice quality aluminized gloves (usually made from woven kevlar with aluminized coating, just as nice and more expensive than the kevlar only ones), but most of the cheap ones will melt/burn when in contact with direct heat sources. I've tried many of the type sold at welding stores, and they're ok for shielding areas that aren't too close to direct heat sources, but I've destroyed most of them very quickly by getting too close to a billet or welding arc.
Frankly, I mostly just grab leather work or welding gloves when I'm using tongs to place or pull stuff out of HT oven, but when running high alloys around 2,000 degrees, they're not adequate for anything but very fast toss in, or jerk out operations, and I'll grab the kevlar. The OP did ask for high temp gloves, I assumed he knew about standard welding gloves, and wanted something more suitable for higher temps.