Laboratory. The analysis of forming sand

The enterprise has the equipment, and also the highly skilled personnel for carrying out of analyses, experiences which allow to judge physical and chemical properties of quartz forming sand.


The sand analysis

The sand analysis

Granulometrichesky structure of quartz forming sand

Mark of sand The size of a cell of a sieve, mm Mass fraction of a clay component, %
From above 0,4 0,4 0,315 0,2 0,16 0,1 0,063 Less than 0,063
2-3K3-4O3-4O2 12 10,1 19,2 44,5 11,5 0,3 0,9 0,2 0,3-0,9
2-3K3-4O3-4O3 12 17,8 18,5 36,5 7,8 5,7 0,8 0,2 0,3-0,9

Controllable elements, characteristics

Mark of sand Controllable elements, characteristics
(GOST 2138-91)
Grain structure Chemical compound
Group The average size of grain, (mm.) Requirements of standards,
%
Actual indicators,
%
2-3K3-4O3-4O2 02 0,19-0,23 SiO2>=97
CaO+MgO<=2,0 Fe2O3<=1,5
clay component <=1,0
SiO2>=96-97
CaO+MgO<=1,5 Fe2O3<=0,29
clay component <=1,0
2-3K3-4O3-4O3 03 From above 0,28

Chemical-physical characteristics

  • Humidity of sand - no more than 4%
  • Gas permeability of forming sand - 220 м2/Па.с
  • Losses at a warming up to a heat, - 0,3 %
  • Fire resistance makes - 1710-1730 °С
  • Caking occurs at - 1300-1350 °С
  • The grain form - semiroundish