blast, hearth, arc, fired, shaft, steel, iron, coal, gas, tank, glass, oil, air, bed, type, large, small, home, four, these, three, two smelting, backyard, boiler, charcoal, melting, fiery, fired, heating, vacuum, iron, burning, solar crucible, fiery, oxygen, temperature electric, induction, industrial, resistance temperature industrial, continuous

used, are, where, have, which, may using because

anthracite coalmelting pot, temperature, tankgraphite crucible, tube, ironbessemer steel, processbloomery ironmetallurgical coke, coal, laboratory, processreheat cracking, temperaturecondensing boiler, temperature, gasoxygen steelmaking, tank, diffusion, gas, atmosphere, reductioniron smelting, pot, crucible, casting, boiler, steelblazing hearth, hot, woodroasting pit, hot, process, temperaturecoke smelting, producedfuel tank, combustion, oil, efficiency, burning, wood, gas, efficient, boiler, fired, bowlsolar heating, atmosphere, heated, electric, hotannealing temperature, process, treatmentvacuum tube, sintering, annealing, arc, melting, induction, tank, casting, oil, heatingsintering temperature, atmosphere, processbrick wall, building, hearth, factory, floor, lined, clayglowing charcoal, hearth, coal, combustion, gas, hot, iron, metaloil refining, tank, producing, recovery, bath, saltcrucible steel, melting, wallfired boiler, clay, brick, heating, electric, combustioncoal combustion, fired, burning, gas, pit, boiler, coke, oilclay pot, crucible, brick, pit, bowl, hearth, floorreheating temperaturerotary vacuum, hearth, shaftsmelting iron, reduction, processcontinuous casting, annealing, rotary, processtiffany glasshot bath, iron, blast, cracking, air, metal, charcoal, gas, combustion, pot, oil, crucible, coke, coalfiery pit, blast, hotcylindrical tube, tank, shaft, boiler, steel, metal, glass, wallinduction heating, meltingmetal smelting, casting, refining, arc, tube, bowl, pot, shaft, salt, meltingtube boiler, wall, linedburning charcoal, fiery, coal, fuel, wood, hot, building, coke, oil, pitwood charcoal, burning, floor, fuel, combustionelectric arc, heating, smelting, induction, resistance, boiler, fuelpuddling processcharcoal burning, pit, iron, tube, fuel, makingsteelmaking processgas tank, diffusion, boiler, temperature, combustion, heating, fired, producing, oilheating boiler, oil, fuel, bath, efficiency, temperaturecombustion efficiency, air, tube, gas, process, temperaturenuclear fuel, blastboiler fuel, efficiency, tube, factory, heating, operating, iron, scalevertical shaft, cylindrical, scale, tube, diffusion, boiler, wallglass tube, bowl, cupola, factory, melting, wall, tankbatch annealing, melting, processbed combustion, boiler, bathhearth steel, processheated graphite, air, atmosphere, metal, tube, iron, vertical, gastemperature annealing, sintering, combustion, scaleelectrical resistance, heating, arclarge scale, bowl, pot, roasting, batchrecovery boiler, process, efficiencyregenerative fuel, process, gassmaller scaleconventional sintering, rotary, heating, boiler, batch, treatment, combustion, castingfactory floor, producing, buildingdomestic hearth, heating, refininglined pit, hearth, steel, residentialsteel smelting, tube, shaft, casting, tank, bowl, boiler, cylindrical, pot, refining, melting, factorycementation processlarger scalediffusion annealing, process, resistancearc melting, tubesmall bowl, scale, cupolaholding tankpit lined, coal, belowresidential treatment, heating, building, solarsalt bathrefining process, existing, oilcyclone frequencydraft tube, resistanceair temperature, blast, heatingbackyard steel, wherecracking clay, resistanceoperating temperature, efficiency, frequencyefficient combustion, scale, heatingseparate bowlmodern industrialmay requirecasting pit, process, metalresistance heatinghuge pot, bowl, brick, blast, backyard, cylindrical, pit, hearth, ironbath temperature, oil, ironconstructed usingrequire specialindustrial recovery, boilertwo separatemaking processfloor below, heatinglaboratory scale, batchthree separateprimitive solar, atmosphere, type, pitold brickshaft resistancehome heatingare usually, capabletank firedusing conventionalusually requirespecial treatmentwall temperaturescale industrialbegan producinggenerally requirewithout cracking, producingblast resistancefour separategoing home