Refractory high-aluminum concretes

Conventional concretes based on andalusite (BW-A/150) and bauxite (BW-B/150)

Symbol	Granularity [mm]	Aggregate	Max. working temp.[^oC]	Min. common refractoriness sP	Min. Al₂O₃ content [%]	Concrete consumption [t/m3]	Make-up water amount [l/100kg]
BW-A/150	0 - 5	andaluzyt	1500	>177	60	2,4	9
BW-B/150	0 - 5	boksyt	1500	>179	82	2,6	8

Technical parameters after drying and baking

Symbol	after drying in 110 °C			after baking in working temperature
Symbol	Effective porosity [%]	Apparent density [g/cm3]	Shear strength [MPa]	Effective porosity [%]	Apparent density [g/cm3]	Shear strength [MPa]	Contraction (-) [%]
BW-A/150	18	2,35	40	19	2,3	90	- 1
BW-B/150	24	2,6	50	20	2,6	90	- 1,5

Low-cement concretes based on andalusite (BW-A/150) and bauxite (BW-B/150)

Symbol	Granularity [mm]	Aggregate	Max. working temp.[^oC]	Min. common refractoriness sP	Min. Al₂O₃ content [%]	Concrete consumption [t/m3]	Make-up water amount [l/100kg]
BW-A/150/N	0 - 5	andaluzyt	1500	>177	60	2,5	6
BW-B/150/N	0 - 5	boksyt	1500	>179	80	2,7	7

Technical parameters after drying and baking

Symbol	after drying in 110 °C			after baking in working temperature
Symbol	Effective porosity [%]	Apparent density [g/cm3]	Shear strength [MPa]	Effective porosity [%]	Apparent density [g/cm3]	Shear strength [MPa]	Contraction (-) [%]
BW-A/150/N	15	2,6	50	16	2,55	90	- 0,8
BW-B/150/N	22	2,7	45	23	2,8	70	- 1,8

Medium cement-content self-leveling concrete based on andalusite

Symbol	Granularity [mm]	Aggregate	Max. working temp.[^oC]	Min. common refractoriness sP	Min. Al₂O₃ content [%]	Concrete consumption [t/m3]	Make-up water amount [l/100kg]
SF BW-A/150/Z	0 - 5	andaluzyt	1500	>175	52	2,7	7

Technical parameters after drying and baking

Symbol	after drying in 110 °C			after baking in working temperature
Symbol	Effective porosity [%]	Apparent density [g/cm3]	Shear strength [MPa]	Effective porosity [%]	Apparent density [g/cm3]	Shear strength [MPa]	Contraction (-) [%]
BW-A/150/N	18	2,67	20	17	2,55	45	- 0,5

APPLICATION

in heaters of blast furnaces in iron and steel metallurgy,
in blast furnaces in iron and steel metallurgy,
in blast furnace ladles in iron and steel metallurgy,
in shaft furnaces for lime baking (drying and heating zones, baking zone and cooling zone),
in lime, sugar and chemical industries,
in power and heat industry.