Patent ID: 8650915

Claim:
A system comprising: (a) an assembly comprising a molten inorganic fiberizable material container, and a bushing for forming substantially vertical primary fibers from the molten material; and (b) an oxy-fuel burner adapted to produce a flame and attenuate the substantially vertical primary fibers, the oxy-fuel burner comprising a refractory burner block adapted to be in fluid connection with sources of primary oxidant and fuel, the refractory burner block having a fuel and primary oxidant entrance end and a flame exit end, the flame exit end having a substantially rectangular flame exit having a width greater than its height, the refractory burner block defining an internal combustion chamber and a slot through the burner block fluidly connecting the internal combustion chamber and the flame exit end, the slot having a height and width substantially the same as the flame exit, the combustion chamber height substantially greater than the height of the slot, and an oxygen manifold fluidly connected to the combustion chamber and adapted to route a gas with an oxygen molar concentration of at least 50% to the internal combustion chamber, the oxygen manifold comprising an upper manifold and a lower manifold each having a plurality of holes therein for accepting first ends of a corresponding plurality of tubes, each one of the tubes extending through a corresponding one of a plurality of non-horizontal passages through the refractory burner block, the non-horizontal passages extending trough the refractory burner block at positions intermediate the fuel and primary oxidant entrance end and the flame exit end.