Ramming paste

Ramming paste

Cold-ramming low-contracting masses for aluminum electrolyers

Cold-ramming low-contracting masses are used for ramming interblock and peripheral joints of aluminum electrolyzers at temperatures of 25±10°C. In combination with the base block, the mass ensures the uniformity of the bottom lining in the electrolyzer. The composition of the mass guarantees the uniformity of all physical-chemical processes of baking and a low degree of expansion and contraction.

 

Cold-ramming mass properties

PROPERTIESVALUE
Apparent density of unbaked mass, g/cm3 1,50-1,65
Apparent density of baked mass, g/cm3 1,38-1,50
Compressive strength, MPa, min. 10-25*
Open porosity of baked mass, % 21
Volume expansion, % 0-2,5
Degree of compaction, % 55-75
Contraction rating, max, % 0,3
Electrical resistivity, max, µΏm 90
Ash content, %, max, % 3,5
* the values difference between two mass batches shall not exceed 10 MPa. 

 

Cold-ramming heat-conducting contact masses for aluminum electrolyers

Cold-ramming heat-conducting contact masses are designed for ramming gaps between the bloom and the cathode block in order to ensure mechanical adhesion and electrical contact between them.

 

Cold-ramming heat-conducting contact mass properties

PROPERTIESVALUE
Apparent density of unbaked mass, g/cm 3 1,55
Compressive strength, MPa, min. 12,0
Thermal conductivity coefficient of unbaked mass, W/mK, min. 7,0
Electrical resistivity, µїm, max.

55,0

Coarseness of grain, mm, max. 2,5