Related by context. Frequent words. (Click for all words.) 62 coke oven 54 blast furnace 54 coke ovens 52 Allegheny Ludlum 49 blast furnaces 49 Whiting refinery 49 electric arc furnace 49 baghouse 49 SunCoke 48 steel mill 47 Horsehead 46 AK Steel 46 Allegheny Technologies 45 Koppers 45 steelmaking 45 desulfurization 45 plant 44 CONSOL 44 copper smelter 44 Calgon Carbon Corporation 44 Middletown Works 44 coking 44 Consol Energy 44 Clairton 44 smelting 44 LTV Steel 43 Blast Furnace 43 SunCoke Energy 43 Kleen Energy 43 molten steel 43 sulfur dioxide emissions 43 Generating Station 43 Koppers Holdings Inc. 43 steel mills 43 steelworks 43 Cement Plant 43 fluid catalytic cracker 42 AK Steel Holding 42 Joe Mandak 42 metallurgical coke 42 smokestacks 42 Widows Creek 42 unplanned shutdown 42 refinery 42 PPG Industries 42 coal mines 42 Dan Nephin 42 Steel 42 hydrogen chloride 42 FirstEnergy Corp. 42 coal mine 42 desulphurization 42 coalmines 41 chlor alkali 41 Wheeling Pittsburgh 41 Furnace 41 Calgon Carbon 41 coalmine 41 WCI Steel 41 fluid catalytic cracking 41 furnaces 41 ArcelorMittal 41 wastewater discharge 41 steelmaker 41 aluminum smelter 41 Nova Chemicals 41 zinc smelter 41 pollution 41 #.# FCCU 41 sulfur dioxide SO2 41 smelter 41 Formosa Plastics 41 potlines 41 Gibraltar Industries 41 Wugang 41 Galvanizing 41 furnace 40 Patriot Coal 40 Tesoro refinery 40 Weirton W.Va. 40 Renco 40 scrubber 40 Power Plant 40 Monongahela River 40 Alloy Products 40 noxious odors 40 air pollution 40 naphtha cracker 40 coal fired 40 sulfur dioxide 40 Ladish Co. 40 smelters 40 FirstEnergy 40 Yuzhkuzbassugol 40 polluted groundwater 40 Bluescope 40 alumina refinery 40 Kaiser Aluminum 40 scrubbers 40 Darby Mine 39 Hegang