MINING AND QUARRYING TRENDS 
 
Table 24~—Froth flotation of metallic carbonate and oxide ores

51 
 
 
1960 
1965 
1970 
1975 
1980 
1985 
Operational data: 
Number of plants  Capacity of plants1 
thousand short tons — 
 Ore treated do — — — Concentrates produced
do —
— — 
 Concentration factor        Reagent consumption: 
 Collectors — thousand pounds.. — 
 Depressants do.. — — .~ 
 Activators do..~.. 
 
 Modifier:2 
pH regulators in flotation 
do - - - 
pH regulators in effluent 
 treatment do - - - 
Dispersants in flotation 
 do...~. 
Dispersants in effluent treat 
 ment do~. 
 Total do_ — — — 
 Frothers do_ — — — 
 
 Fiocculants:2 
 In flotation do — — — 
In effluent treatment 
do - - -- 
 13 
 
4,900 
2,854 
 941 
 3.0 
 
22,573 
 610 
1,280 
 14 
 
6,800 
16,079 
7,086 
 2.3 
 
23,695 
1,588 
 13 
22,750 
22,213 
13,040 
 1.7 
31,819 
2,627 
 ~ 
 13 
31,500 
30,149 
15,582 
 1.9 
22,931 
18,226 
 ~ 
 13 
 
52,850 
42,903 
24,049 
 1.8 
 
18,487 
30,393 
9 
 
41,059 
24,490 
19,670 
1.7 
 
6,515 
33,798 
76 
 
NA 
 
NA 
 
NA 
 
NA 
NA 
, 
NA 
 
NA NA 
NA 
 
NA 
 
NA 
 
NA* 
NA 
 
NA 
 
NA 
 
NA 
NA 
 
NA 
 
NA 
 
NA 
61,477 
 
20,898 
 
3,280 
 
~ 
 
6,639 
1,345 
15,280 
 865 
31,635 
 164 
39,457 
 397 
r93,053 808 
85,655 
 433 
 
1,306 NA 
458 NA 
220 NA 
. 
1,985 
 
NA 
r9,135 
 
NA 
1,347 
~ 18,460 
 
1 306 
458 
220 
1 985 
9 135 
19 807 
 
NA NA 
NA NA 
NA NA 
NA NA 
NA 
NA 
5,231 
7 
 Total do~~ 
Other reagents:2 
 Filteringaid do~ 
 Grinding aid do~ 
 
~ NA Not available. 
 
1Annual capacity for 1960-80 calculated from daily capacity assuming 350
operating days per year. 
2Only the totals are available for historical data, which excludes effluent
treatment. 
Table 25 —Froth flotation of industrial mineral ores 
 1960 1965 1970 1975 1980 1985 
 55 64 56 75 75 51 
 50,400 66,850 132,300 163,650 196,400 184,313 
 36,191 52,653 80,963 100,939 149,850 137,351 
 11,888 17,376 23,823 29,111 42,812 32,711 
 3.0 3.0 3.4 3.5 3.5 4.2 
 163,967 188,119 528,669 345,208 431,942 339,602 
 9,231 4,346 11,023 7,314 11,719 4,695 
 2,988 511 484 393 1,122 635 
 
NA 
NA 
NA 
' ~NA 
NA 
177,267 
NA 
NA 
NA 
NA 
NA 
10,684 
NA 
NA 
NA 
NA 
NA 
491 
NA 
NA 
NA 
NA 
NA 
2,682 
82,456 
2,475 
54,889 
4,870 
161,470 
 2,863 
112,639 
 4,740 
116,819 
6,508 
191,124 
 1,150 
 
Flocculants:3 
 
 
 
 
 
 
 
In flotation do_ — — 
In effluent treatment 
 
875 
3,207 
751 
2,477 
2,614 
1,137 
 do.. - -Total do_ — — 
 
NA 
NA 
NA 
NA 
NA 
1,777 
 
 
875 
3,207 
751 
2,477 
2,614 
2,914 
NA Not available. 
 
1mual capacity for 1960-80 calculated from daily capacity assuming 350 operating
days per year. 
 
2lncludes fuel oil used as an extender or activator. 
3Only the totals are available for historical data, which excludes effluent
treatment. 
 
 
Operational data: 
 Number of plants 
 Capacity of plants' 
thousand short tona.. - 
 Oretreated do_ 
 Concentrates produced _do - - - 
 Concentration factor        Reagent consumption: 
 Collectors2_ thousand pound& - 
 Depressants          
 Activators           
 Modifier:3 — 
pH regulators in flotation 
 do. — — — pH regulators in effluent 
 treatment do__ 
Dispersants in flotation 
 do. — - — Dispersants in effluent treat 
 ment do__ 
 Total do._~ 
 Frothers do___