Description of industry 



Part V. 



primary metals 

 industries (SIC 33) 



The industries which are incorporated within 

 the category of primary metals in this report are 

 those which are included in the Standard Indus- 

 trial Classification (SIC) Manual (6) as industry 

 group 33. This industrial group is defined as those 

 "establishments engaged in the smelting and re- 

 fining of ferrous and nonferrous metals from ore, 

 pig, or scrap; in the rolling, drawing, and alloying 

 of ferrous and nonferrous metals; in the manufac- 

 ture of castings, forgings, and other basic products 

 of ferrous and nonferrous metals; and in the manu- 

 facture of nails, spikes, and insulated wire and 

 cable. The major group also includes the produc- 

 tion of coke." 



This section defines, as accurately as possible 

 at this time, the process water quality require- 

 ments for the industry. 



Process water utilization by the primary metals 

 industry as given in the Bureau of the Census (7) 

 is summarized by the following table. 



Process water utilization 



Process water 

 used, 1964 

 Industry SIC No. (billion gals.) 



Iron and steel production 331 885 



Iron and steel foundries 332 12 



Copper industry 3331, 3351 36 



Aluminum industry 3334, 3352 20 



All other primary metal 



industries 43 



Total process water, primary 



metals 33 996 



The production of iron and steel utilized almost 

 90 percent of all process water used by the in- 

 dustry. For this reason, water quality requirements 

 have only been included for this segment of the 

 industry. 



Processes utilizing water 



The iron and steel industry as defined for this 

 report includes pig iron production, coke produc- 

 tion, steelmaking, rolling operations, and those 

 finishing operations common to steel mills, such as, 

 cold reduction, tin plating, and galvanizing. Al- 

 though many steel companies operate mines for 

 ore and coal, ore beneficiation plants, coal cleaning 

 plants, and fabricating plants for a variety of spe- 

 cialty steel products, these are excluded from this 

 report. 



Most of the iron and steel making facilities in 



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