Increasing The Efficiency Of Macdougall Roasters At The Great Falls Smelter Of The Anaconda Copper Mining Co. (514834fb-6e50-43c7-b592-9a3e5ae4fb1c)

I. INTRODUCTION. SINCE the first installation of MacDougall roasters at the Great Falls smelter of the Anaconda Copper Mining Co., the capacity of the furnaces has been more than doubled. During the first nine or ten years of the operation of the MacDougall department the tonnage treated by the furnaces remained practically unchanged. Experimental work carried out in 1906, however, showed that increasing the draft of the furnaces would bring about an increase in capacity. In 1909 the MacDougall department was connected to the new smelter stack and