More information from O*NET OnLine:

Refractory Materials Repairers, Except Brickmasons - 49-9045.00

O*NET-SOC Description

Build or repair equipment such as furnaces, kilns, cupolas, boilers, converters, ladles, soaking pits, and ovens, using refractory materials.

49-0000	Installation, Maintenance, and Repair Occupations
49-9000	Other Installation, Maintenance, and Repair Occupations
49-9040	Industrial Machinery Installation, Repair, and Maintenance Workers
49-9045.00	Refractory Materials Repairers, Except Brickmasons

47-2011.00	Boilermakers
47-2021.00	Brickmasons and Blockmasons
47-2051.00	Cement Masons and Concrete Finishers
47-2053.00	Terrazzo Workers and Finishers
47-3011.00	Helpers--Brickmasons, Blockmasons, Stonemasons, and Tile and Marble Setters
51-2041.00	Structural Metal Fabricators and Fitters
51-4051.00	Metal-Refining Furnace Operators and Tenders
51-4071.00	Foundry Mold and Coremakers
51-4191.00	Heat Treating Equipment Setters, Operators, and Tenders, Metal and Plastic
51-9195.00	Molders, Shapers, and Casters, Except Metal and Plastic

Chip slag from linings of ladles or remove linings when beyond repair, using hammers and chisels.
Climb scaffolding, carrying hoses, and spray surfaces of cupolas with refractory mixtures, using spray equipment.
Dry and bake new linings by placing inverted linings over burners, building fires in ladles, or by using blowtorches.
Dump and tamp clay in molds, using tamping tools.
Measure furnace walls to determine dimensions and cut required number of sheets from plastic block, using saws.
Mix specified amounts of sand, clay, mortar powder, and water to form refractory clay or mortar, using shovels or mixing machines.
Reline furnaces using ramming material.
Reline or repair ladles and pouring spouts with refractory clay, using trowels.
Remove worn or damaged plastic block refractory linings of furnaces, using hand tools.
Spread mortar on stopper heads and rods, using trowels, and slide brick sleeves over rods to form refractory jackets.
Transfer clay structures to curing ovens, melting tanks, and drawing kilns, using forklifts.

Clean equipment, parts, or tools to repair or maintain them in good working order.
Climb equipment or structures to access work areas.
Cut materials according to specifications or needs.
Fabricate parts or components.
Measure distances or dimensions.
Move large objects using heavy equipment.
Place materials into molds.
Prepare compounds or solutions to be used for repairs.
Repair structural components.
Repair worn, damaged, or defective mechanical parts.
Seal gaps or cracks to prevent leakage or moisture intrusion.