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Bureau of Mines / Minerals yearbook: Metals and minerals 1978-79
Year 1978-79, Volume 1 (1978-1979)

Cammarota, V. Anthony, Jr.; Lucas, John M.; Gorby, Barbara M.
Zinc,   pp. 981-1019 ff. PDF (3.8 MB)


Page 981

  981Zinc 
By V. Anthony Cammarota, Jr.,1 John M. Lucas,1 
and Barbara M. Gorby2 
 In 1978, both mine and metal production declined as mines closed and smelters
cut back production to reduce stocks. However, consumption increased and
imports of both concentrate and metal made up the shortfall. The closed mines
were put on a care and maintenance status, primarily because of low zinc
prices. Exploration and development continued in Tennessee, Kentucky, and
Wisconsin, and a significant sulfide deposit was reported in Maine. Consumption
of slab zinc was up over that of 1977. The decline in the amount of zinc
used in 
diecastings, especially in the automotive industry, was offset by increased
use of zinc in the galvanizing sector. 
 In 1979, mine production declined further to the lowest level since 1932,
but metal production increased as a new smelter became fully operational.
The largest smelter in the United States, and the world's fourth largest,
closed in December. Imports of concentrate were higher to supply feed to
the the smelters, but imports of slab zinc declined to about the 1977 level.
Consumption of slab zinc declined as the economy 
Table 1.—Salient zinc statistics 
1975 
1976 
1977 
1978 
1979 
United States: 
Production: 
Domestic ores, recoverable content 
  metric tons_ — Value  thousanda_ — 
Slab zinc: 
 From domestic ores metric tona_ — From foreign ores do —
—
— Fromscrap do~ 
Total                           
    Secondaryzinc1 do.~ Exports of slab zinc do~ Imports (general):    Ores
(zinc content) do~~    Slabzinc do~~ Stocks, December 31:    Producer do.~
   Consumer do.~    Government stockyile do. — — —
 ReprocessedGSAzinc do.~ 
Consumption: 
 Slabzinc do_~ 
 All classes do. — — — 
Price: Prime Western, cents per pound (delivered) — 
World: 
Production: 
 Mine thousand metric tons.. — Smelter3 do.~ 
Price: Prime Western grade, London centsperpound                        
425,792 
$366,097 
439,543 
$358,541 
407,889 
$309,338 
302,669 
$206,854 
267,341 
$219,841 
279,376 
118,018 
52,513 
346,429 
106,125 
62,192 
322,208 
86,156 
45,914 
267,350 
139,348 
34,774 
255,344 
217,137 
53,212 
449,907 
204,402 
6,257 
131,530 
345,127 
67,745 
97,319 
349,914 
3,123 
839,445 
1,117,484 
38.96 
5,850 
5,013 
33.76 
514,746 
276,089 
3,187 
88,101 
648,174 
87,952 
109,909 
349,440 
1,028,876 
1,394,244 
37.01 
5,690 
5,362 
32.38 
454,278 
284,065 
215 
111,410 
523,206 
r83760 
r86,477 
347,828 
~ 
999,505 
1,367,704 
34.39 
5,906 
5,527 
26.71 
441,472 
304,047 
723 
188,003 
617,840 
37,928 
99,325 
345,872 
~ 
1,050,585 
1,441,810 
30.97 
5,878 
5,614 
26.88 
525,693 
316,818 
279 
224,952 
527,212 
59,066 
93,334 
345,684 
~ 
1,000,606 
1,394,314 
37.30 
5,998 
5,998 
33.59 
~Revbed. 
1Excludes redistilled slab zinc. 
2lncluded in total amount withdrawn from Government stockpile. 
3Primary metal production only; includes secondary metal production where
inseparably included in country total. 


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