Consumable tip burners, submerged combustion melters including same, and methods

A combustion burner for submerged combustion comprising:

• (a) an annular liquid cooled jacket defining a central longitudinal through passage;
• (b) at least one inner conduit and a substantially concentric outer conduit positioned in the through passage, each conduit comprising proximal and distal ends, all conduit distal ends extending beyond a distal end of the annular liquid cooled jacket, the conduits configured so that the outer and inner conduits are movable axially, the at least one inner conduit forming a primary passage and the outer conduit forming a secondary passage between the outer conduit and the at least one inner conduit, the at least one inner conduit and the outer conduit having positions selected from the group consisting of:
• (i) the distal end of the outer conduit extends beyond the distal end of the at least one inner conduit, and
• (ii) the distal end of the at least one inner conduit extends beyond the distal end of the outer conduit;
• and
• (c) the outer conduit having an exterior surface configured along a lower portion thereof with at least two sets of axially spaced dog teeth, one set mating with adjacent dog teeth on one or more dog connectors secured in the annular liquid cooled jacket, the one or more dogs connectors configured to be operable hydraulically between a locked position and a release position, allowing the outer conduit to be repositioned axially relative to the annular liquid cooled jacket.