Related by context. Frequent words. (Click for all words.) 61 blast furnaces 60 blast furnace 57 steelmaking 56 furnaces 56 electric arc furnace 55 steelworks 54 steel mill 52 coalmines 52 colliery 52 furnace 52 smelting 51 coking 50 boilers 50 kilns 49 Colliery 49 coal 49 copper smelter 49 coal mines 49 smelter 49 Middletown Works 49 zinc smelter 48 plant 48 mill 47 steel mills 47 kiln 46 smokestack 46 coalmine 46 coal mining 46 Wheeling Pitt 46 Furnace 46 aluminum smelting 46 smelters 46 mines 46 coal mine 45 Smelting 45 collieries 45 limestone quarry 45 longwall mining 45 slag 45 chlor alkali 45 pulverized coal 44 Coking coal 44 boiler 44 Weirton Steel 44 brick oven 44 tpy 44 scrubber 44 coal fired 44 Wheeling Pittsburgh 44 coalfields 44 cooling towers 43 coking coal 43 fly ash 43 steelworkers 43 Coal 43 Generating Station 43 smokestacks 43 metallurgical 43 sawmill 42 alumina 42 aluminum smelter 42 Bethlehem Steel 42 Coal Mine 42 tannery 42 pig iron 42 ovens 42 steel 42 scrubbers 42 alumina refinery 42 pulp mill 42 steam generator 42 asbestos 42 tailings 42 manganese 41 steam generators 41 ore 41 firebox 41 mills 41 ferrochrome 41 steelwork 41 AK Steel 41 thermal coal 41 tpa 41 steelworker 41 mine shafts 41 aluminum smelters 41 ArcelorMittal 41 metallurgical coal 41 t y 41 mine 41 anthracite 41 sponge iron 41 bituminous coal 40 sulfur dioxide emissions 40 #,# tpa 40 gasifier 40 flue gas 40 CONSOL 40 sintering 40 foundry 40 Ormet