| Task | Importance |
|---|---|
| Measure furnace walls to determine dimensions and cut required number of sheets from plastic block, using saws. | 86% |
| Reline or repair ladles and pouring spouts with refractory clay, using trowels. | 84% |
| Dry and bake new linings by placing inverted linings over burners, building fires in ladles, or by using blowtorches. | 79% |
| Remove worn or damaged plastic block refractory linings of furnaces, using hand tools. | 77% |
| Chip slag from linings of ladles or remove linings when beyond repair, using hammers and chisels. | 74% |
| Climb scaffolding, carrying hoses, and spray surfaces of cupolas with refractory mixtures, using spray equipment. | 73% |
| Mix specified amounts of sand, clay, mortar powder, and water to form refractory clay or mortar, using shovels or mixing machines. | 72% |
| Spread mortar on stopper heads and rods, using trowels, and slide brick sleeves over rods to form refractory jackets. | 71% |
| Dump and tamp clay in molds, using tamping tools. | 66% |
| Transfer clay structures to curing ovens, melting tanks, and drawing kilns, using forklifts. | 64% |