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1.Characteristics:

Refractory ball is named thermal storage ceramic ball which is featured with high strength, wear resistance, large thermal conductivity ,heat capacity, good heat storage and heat stability etc. It can pre-heat both coal gas and air to rapidly increase the combustion temperature to meet the billet heating requirement in steel rolling equipment. Furthermore, it is not easy to crack when the temperature changes sharply. 

2.Application:

It is especially applicable as heat storage packing of heat accumulators of air separation plants and gas heating stoves of blast furnace in steel plants.

3.Chemical and physical property

physical property			Chemical Composition
Item	Unit	Index	% Content	Index
Bulk density	t/m2	2.4-2.6	Al2O3 %	20-25
Specific heat	J/kg.k	836	Al2O3 + SiO2 %	>92
Specific heat conductance	w/m.k	2.7-2.9	Fe2O3 %	<1
Hardness	Mohs	≥6.5
Abrasion loss	%	0.05
Water absorption	%	<1

4.Main technical data:

Item	Unit	Index
Refractoriness	0°C	≥1770
Crushing strength	N/piece	400-15000
Loading refractoriness	°C	≥1450
Porosity	%	≤21
Reburning	%	≤0.5

Refractory Ball