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 Air-cooled Granulated Expanded Total 
Year Screened Unscreened 
 — Quantity Value Quantity Value Quantity Value Quantity Value Quantity
Value 
 1971 20,217 41,203 1,227 1,149 1,787 ' 2,445 1,581 ' 4,887 24,812 ' 49,684
1972 20,968 43,652 910 1,135 1,657 23,059 1,518 ' 5,529 25,053 ' 53,375 
Excludes value of slag used for manufacturing hydraulic cement. Includes
value of slag used for manufacturing hydraulic cement. 
Source: National Slag Association. 
Table 2.—lron.blast-furnace slag processed in the United States, by
States 
(Thousand short tons and thousand dollars) 
 Screened air-cooled All types 
Year and State 
 Quantity Value Quantity Value 
1971 
 4,397 10,209 5,615 12,179 
 4,916 10,681 5,625 12,185 
 3,737 6,265 4,973 9,145 
 7,167 14,048 8,599 16,175 
Total 20,217 ' 41,203 24,812 ' 49,684 
 4,235 9,442 5,272 11,794 
 4,967 11,659 5,991 13,497 
 4,519 8,760 5,351 11,525 
 7,247 13,791 8,439 16,559 
  1143Slag—Iron and Steel 
By Harold J. Drake' 
 Production of processed iron and steel slag was up 6% in 1972 in contrast
to the slight, decline that occurred in 1971. The advance was led by a 20%
increase in production of steel slag and a 1% increase in output of iron
slag. A small rise in output of air-cooled iron-blast-furnace slag, which
normally accounts for about 85% of iron slag, was partly offset by declines
in output of other types. Increased consumption of iron and steel slag was
reported in most 
of its principal uses. 
 Prices of iron slag generally were stable in 1972; only slight increases
were recorded in principal uses. The average price of all steel slag declined.
Imports were off again by 37% whereas export tonnage rose significantly by
27%. Value of exports declined sharply, principally because of sharply reduced
shipments of - high-value material to Belgium-Luxembourg. 
 ' Physical scientist, Division of Nonmetallic Minerals. 
Table l.—Iron.blast-furnace slag processed in the United States, by
type 
(Thousand short tons and thousand dollars) 
Ohio 
Pennsylvania 
Illinois, Indiana, Michigan 
OtherStates' 
1972 
Ohio 
Pennsylvania 
fllinois, Indiana, Michigan 
Other States' 
 Total 20,968 43,652 25,053 53,375 
' Excludes value of slag used for manufacturing hydraulic cement. 
' Includes, Alabama, California, Colorado, Kentucky, Louisiana, Maryland,
Minnesota, New York, Texas, 
Utah, and West Virginia. 
Source: National Slag Association.