Abstract: A method of forming a heat resistant gas transfer line. The line includes a metal outer shell, a tubular inner liner formed of a plurality of prefired refractory rings joined together by shiplap joints having expansion gaps, and an intermediate liner including bubble alumina concrete filling the annular space between the inner liner and the outer shell.

Abstract: A plant extractor which includes a pair of jaws, at least one of the jaws being a displaceable jaw which is movable towards the other of the jaws, a ground engaging member forming a fulcrum and being pivotally attached to the plant extractor, the ground engaging member being linked to the displaceable jaw so that when placed on the ground, the ground engaging member displaces the displaceable jaw towards the other jaw to grip the plant, and a lever operable to pivot the plant extractor about the fulcrum thereby to permit extraction of the plant from the ground.

Abstract: A carbon black reactor employing a dished head at its feed inlet, this head comprising a sprung arch dome and an interpositioned layer of insulation.