A Study Of Physical Properties OF Selected Nigerian Clays For Furnace Brick Lining Production
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The physical properties of some clay deposits from six locations ~pread over
three States in Nigeria have been investigated for furnqce brick lining
(refractory) production The principal jJroperfies of the clays determined
were: sticking point tempera.ture, sinlering temperature, cold crushing
strength, bulk density, appatent porosity, shrinkage/growth and thermal
shock resistance. Shuwari clay has a refractoriness of 150rfC, apparent
porosity, 14.02%, bulk density, 1.88 Mgm·3
• cold crushing strength, 7. 75
MPa. shrinkage/growth, 1.52% and thermal resistance of 6 cycles. Pulka
clay has J sintering temperature of 125rfC wilh corresponding refractoriness
of 140rfC, cold cntshing strength, 9. 25 lvfpa, apparent porosity, 15.87 %,
bulk density, 1.61kfgm-3 and thermal shock resistance 1 cycle. Ngala clay
has a low firing temperatun; of 1 OOO"C, sintering temperature, 120(/'C. Its
cold crushing strength. apparent porosity and thermal shock resistance were
not determined Ubulu-Uku clay sintering temperature was 1700"C, its
estimated refractoriness 1900"C; apparent porosity, 17.0 %, bulk density
1. 70 Mgm-3
, and its estimated ·thermal shock resistance was 14 cycles.
Ememukohwarien clay has sintering temperature of 140ffC. estimated
refractoriness. 1650°C, cold cmshing strength, 7.74 1vfpii, bulk density. of
1. 78 Mgm·3
, apparent porosity, 16.77% and thermal shock resistance of 12
cycles. ljetu clay has sintering temperalure of 145rfC, estimated
refractoriness, 170ifC, cold crushing strength was J 7.21 !vfpa, bulk density,
1. 7 4 Mgm·3
, apparent porosity, 15. 70% and thermal shpck resistance 12
cycles. The possible areas of application of the clays have been suggested in
this paper.
Keywords
TA Engineering (General). Civil engineering (General), TJ Mechanical engineering and machinery