The production of the Open Society "Dolomit"
 

 

  • Dolomitic flour
  • Rubble fractional
  • The dolomitic filler
  • Mineral powder of mark MT-1
  • Flour calcareous packed up on 30 kg
  • Dolomite crude for an iron and steel industry
  • Flour calcareous for glass manufacture
  • Flour, mineral powder, filler packed up in containers "Big-bag"

 


 Chemical compound of dolomite of a deposit of "Gralevo"

 

Oxides

Fluctuations in %, from/to

The Most typical values, %

Average value, %

SiO2

0,39 / 13,37

1,0-2,0

1,65

Al2O3

0,1 / 1,79

0,2-0,5

0,37

Fe2O3

0,11 / 1 27

0,2-0,5

0,35

TiO2 

0,01 / 0,14

0-0,05

0,05

CaO  

23,84 / 34,54

29-31

30,02

MgO

14,75 / 22,36

20-21

20,5

K2O

0,02 / 0,64

0,05-0,2

0,13

Na2O

0,03 / 0,24

0,03-0,1

0,05

SO3

0 / 1,02

0-0,62

0,26

P2O5

0 / 0,17

0-0,03

0,03

MnO

0 / 0,11

0-0,05

0,02

n.n.n.        

 

46,39

 

CaCO3

47 / 58

50-52

51

MgCO3

38 / 47

43-45

42

CaCO3 + MgCO3

85 / 99,8

93-96

95

dolomites

 

 

 

 


  
 DOLOMITE
 
 

DOLOMITE, is the mineral and the breed, named in honour of French mineralogist and chemist D.Dolomyo (1750–1801). The mineral dolomite, is a natural carbonate of calcium and magnesium, CaMg (CO3)2. The colour is white, grey, blankly-yellow. It is shine on sides and on cleavability in the unit – glass, matte. Hardness is 3,5–4. It is fragile. Density is 2,85–3,0. It is crystallises in trigonal crystal system, forming rhombohedral the crystals which sides have the form of rhombuses and are parallel to its directions made cleavabilities. Unlike more widespread carbonate of calcium (calcite) does not form scalenohedrons. Dolomite crystals often «saddle-type», with the bent sides. The dolomite powder boils in cold hydrochloric acid, pieces in it are dissolved very slowly, but it is easy soluble in hot acid. Dolomite – a widespread vein mineral of hydrothermal deposits. It is formed also as a result of replacement calcite under influence magmatogene or ground waters. The rock dolomite consists mainly (on 95 %) of a dolomite mineral. The colour is usually white or grey, but can have any other shade – yellowish, reddish, etc. Is scratched by a steel needle and differs from limestone smaller solubility and stronger shine. Authentically to define dolomite it is possible only by the chemical analysis. The maintenance calcite strongly varies, so there is a transitive number between dolomite and limestone. Some dolomite has inclusions of fossil organisms, as a rule, distinguishable with the naked eye. Fossils meet in them much less often, than in limestones that, possibly, is caused by destruction organogenic structures at dolomitization. For the present there is no common opinion about a dolomite origin. Calcium and magnesium carbonates are not taken from sea water by live organisms, it is not possible to besiege them and in vitro, as much as possible approached to the natural. It is not excluded that generally dolomite is formed as a result of replacement of limestones which occurs under the influence of the sea water filtering through a layer of limy silt on a sea-bottom. Such replacement can occur also under the influence of soil or even the magmatogene waters filtered through more ancient limestones. Dolomite is extended almost as widely as limestone, and is used in most cases for the same purposes. Besides, it serves one of sources of reception of metal magnesium and is used by steel manufacture, basically in martin furnaces (as raw materials for refractory materials and a gumboil).

 

Additional information