IRON ORE, PIG IRON, FE.RRO-ALLOYS, AND STEEL 551


covered, however, have been accounted for previously in shipments from mines.
 Beneficiated ore shipped from domestic mines in 1941 increased 50 percent
over 1940 and comprised 21 percent of the total shipments compared with 17
percent in 1940.

Beneficiated iron ore shipped from mines in the United States, 1940—.41
[Exclusive of ore containing 5 percent or more manganese and of ore sold
for paint]
State
Variety
1940

1941



Gross tons
Value
 — Gross tons
Value
Alabama             
Georgia                  
Minnesota            
New Jersey 

~:~~~:::::::::::
~~~::::::::::::::::~
California       

.
Brown ore            do               
Hematite            
Magnetite      
::::~~::::::::::::::::::::


~
Magnetite                      

~
 750,131
 41,015
9,353,270
 604,249
} 2,149,197
} 27,879
12,925,741
$1,792, 584
63,353
23,839,368
2,817,541
8,569,580

91,164

 

37,173,590
1,230,892
245,972
14,846,899
666,550
2,375,123



10,684

19,376, 120
$3, 273,354
572,361
38,483,473
3,437,082
10,017,684



50,940

55,834,894
 The quantity of crude ore beneficiated m the Lake Superior district (all
in Minnesota) in 1941 totaled 25,691,501 gross tons and the heneficiated
ore recovered 15,125,368 tons—a ratio of 1.699: 1. In 1940 the crude
ore treated totaled 14,547,504 tons and the beneflciated ore recovered therefrom
9,439,921 tons—a ratio of 1.541: 1. Most of the concentration in this
district is done by washing, but a few plants are equipped with jigs, and
two plants sinter ore after washing. Processes have been described by Counselman.4
 In the past, an increase in domestic iron-ore production has been accompanied
by a percentage decrease in the quantity of beneficiated ore shipped. However,
in the record year 1941, 21 percent of the shipments were beneflciated ore
compared with 17 percent in 1940. Thus it is apparent that supplies of direct
shipping ores are being stressed to the limit, and lower-grade deposits are
being exploited. This is made possible in part by more efficient mining and
beneficiating methods. Data showing the relationship between beneflciated
ore and total shipments for recent years are shown in the following table,
and corresponding statistics for 1914 (the first year for which they were
gathered) to 1929 are given in Mineral Resources, 1930, part 1. Data for
1930 to 1934, inclusive, are given in Minerals Yearbook, 1935, and for 1932
to 1936, inclusive, in Minerals Yearbook, 1937.

Iron ore shipped from mines in the United States, 19~5—~9 (average)
and 1937—41,
in gross tons, and percentage of beneficiated ore compared to the total shipped
[Exclusive of ore containing 5 percent or more manganese and of ore sold
for painti



Proper-
tion of



Proper
tion of
y~
Benefici-
Total
b~fleflC1
total (per.
cent)
Year

Total
total (per. cent)

17.2
17.2
20.8
1925-29 (av.L
1937        
1938        
8,653,590
12,350,136
4,836,435
*
66,697,126
72,347,785
26,430,910
13.0
17.1
18.3
1939        
1940        
1941        
9,425,809
12,925,741
19,376,120
54,827,100
75,198,084
93,053,994

 4Counselman, T. B., Beneficiating Minnesota Iron Ores: Regional Mee~Ing,
Am. Inst. Mm. and Met. Eng., Duluth, August 12-15, 1941, pp.15-22.

497779—43--———37