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Diatomite
Diatomite is a nearly pure silicious sedimentary rock consisting
of fossilised skeletal diatoms i.e. siliceous skeletons of
microscopic unicellular floating acquatic algae.
Diatomite, recovered either by open pit or underground mining,
typically containing up to 50% moisture, is dried in rotary
kilns or sundried ready for light milling and separation to
produce natural, calcined and flux calcined grades of diatomite.
Calcination (870°-1.093°C) or flux calcinations (1.148°C)
removes organics, reduces surface area by fusing the fines
structure of the particles.
Link:
-British
Geological Survey, World Mineral Statistics 1999-2002
-IDPA-The
International Diatomite Producers Association
Diatomite Production
Thousand Tonnes
| |
1999 |
2000 |
2001 |
2002 |
2003 |
2004 |
| Europe |
|
|
|
|
|
|
| Czech Republic |
37.000 |
34.000 |
83.000 |
28.000 |
41.000 |
33.000 |
| France |
73.000 |
70.000 |
70.000 |
68.000 |
75.000 |
75.000 |
| Iceland |
28.482 |
27.614 |
30.434 |
26.494 |
30.000 |
28.000 |
| Portugal |
|
655 |
387 |
200 |
150 |
120 |
| Romania |
1.992 |
9.712 |
6.517 |
20.128 |
31.298 |
14.192 |
| Slovakia |
2.300 |
2.000 |
1.000 |
950 |
940 |
930 |
| Spain |
50.000 |
55.000 |
57.000 |
50.000 |
36.000 |
34.000 |
| United Kingdom |
|
0 |
0 |
3.000 |
4.000 |
4.300 |
| total |
192.774 |
198.981 |
248.338 |
196.772 |
218.388 |
189.542 |
| |
|
|
|
|
|
|
| Asia |
|
|
|
|
|
|
| Armenia |
|
300 |
280 |
250 |
230 |
200 |
| China |
|
340.000 |
350.000 |
370.000 |
380.000 |
390.000 |
| Iran |
4.350 |
5.200 |
0 |
0 |
9.500 |
9.500 |
| Korea |
80.222 |
34.143 |
27.530 |
26.000 |
15.636 |
2.441 |
| Thailand |
|
720 |
720 |
780 |
1.288 |
1.372 |
| total |
84.572 |
380.363 |
378.530 |
397.030 |
406.654 |
403.513 |
| |
|
|
|
|
|
|
| America |
|
|
|
|
|
|
| Argentina |
10.000 |
11.000 |
17.090 |
23.314 |
24.946 |
25.000 |
| Brazil |
12.500 |
10.000 |
7.386 |
7.000 |
6.900 |
7.197 |
| Canada |
|
3.000 |
2.800 |
2.600 |
2.000 |
1.900 |
| Chile |
14.477 |
13.384 |
14.300 |
14.000 |
13.900 |
13.700 |
| Costa Rica |
10.300 |
10.000 |
11.800 |
11.500 |
11.200 |
11.000 |
| Mexico |
62.500 |
96.448 |
69.474 |
62.322 |
67.801 |
59.818 |
| Peru |
16.000 |
15.500 |
15.200 |
15.000 |
14.800 |
14.600 |
| United States |
746.695 |
677.000 |
644.000 |
624.000 |
619.922 |
620.000 |
| total |
872.472 |
836.332 |
782.050 |
759.736 |
761.469 |
753.215 |
| |
|
|
|
|
|
|
| Africa |
|
|
|
|
|
|
| Algeria |
|
1.800 |
1.700 |
1.500 |
2.595 |
2.665 |
| Ethiopia |
|
650 |
670 |
690 |
700 |
720 |
| Kenya |
|
448 |
441 |
1.333 |
353 |
330 |
| South Africa |
|
230 |
200 |
190 |
170 |
160 |
| total |
|
3.128 |
3.011 |
3.713 |
3.818 |
3.875 |
| |
|
|
|
|
|
|
| Oceania |
|
|
|
|
|
|
| Australia |
9.500 |
9.300 |
9.100 |
9.000 |
9.800 |
10.000 |
|
total |
9.500 |
9.300 |
9.100 |
9.000 |
9.800 |
10.000 |
| |
|
|
|
|
|
|
| WORLD TOTAL
|
2.031.790 |
1.431.232 |
1.424.040 |
1.369.964 |
1.403.947 |
1.364.020 |
Source: Österreichisches Bundesministerium für Wirtschaft
und Arbeit (Federal Ministry for Economics and Labour of the
Republic of Austria), World Mining Data, April 2006
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