Abstract In a building material comprising an inorganic binder selected from the group consisting of Portland cement, alumina cement, calcium silicate, lime and gypsum, structurally reinforced with glass fibers, the improvement which comprises employing as said glass fibers alkali-resistant calcium silicate glass fibers spun and drawn from molten phosphorus slag, said fibers consisting essentially of approximately ______________________________________ CaO 10-60% by weight
SiO 2 35-70
Al 2 O 3 1-10
ZnO+ZrO 2 +Cr 2 O 3 +TiO 2 0.1-10
Fe 2 O 3 and Na 2 O
<2.
______________________________________
In the production of phosphorus wherein a phosphorus-containing material is electrothermally processed to produce phosphorus and a molten slag, the phosphorus is separated and the molten slag is solidified, the improvement which comprises adjusting the SiO 2 content and adding to the separated slag at least one modifying oxide selected from the group consisting of ZnO, ZrO 2 , Cr 2 O 3 and TiO 2 to form a molten mass having the approximate composition ______________________________________
CaO [10-60] 20-35 by weight
SiO.sub.2 [35-70] 40-60
Al.sub.2 O.sub.3 1-10
ZnO+ZrO.sub.2 +Cr.sub.2 O.sub.3 +TiO.sub.2
0.1-10
oxide impurities, <2,
Fe.sub.2 O.sub.3 and Na.sub.2 O
______________________________________ the weight ratio for CaO: SiO 2 being about 1:2, and solidifying said mass by melt spinning and attenuating to form calcium silicate glass fibers.
Claim 2
Dependent Claim
126 words
In the production of phosphorus wherein a phosphorus-containing material is electrothermally processed to produce phosphorus and a molten slag, the phosphorus is separated and the molten slag is solidified, the improvement which comprises adjusting the SiO 2 content and adding to the separated slag at least one modifying oxide selected from the group consisting of ZnO, ZrO 2 , Cr 2 O 3 and TiO 2 to form a molten mass having the approximate composition ______________________________________
CaO [10-60] 20-35 by weight
SiO.sub.2 [35-70] 40-60
Al.sub.2 O.sub.3 1-10
ZnO+ZrO.sub.2 +Cr.sub.2 O.sub.3 +TiO.sub.2
0.1-10
oxide impurities, <2,
Fe.sub.2 O.sub.3 and Na.sub.2 O
______________________________________ the weight ratio for CaO: SiO 2 being about 1:2, and solidifying said mass by melt spinning and attenuating to form calcium silicate glass fibers.
Claim 3
Dependent Claim
64 words
The process of claim 1, wherein ______________________________________
CaO 15-50% by weight
SiO.sub.2 40-65
Al.sub.2 O.sub.3 1-10]
ZnO+ZrO.sub.2 +Cr.sub.2 O.sub.3 +TiO.sub.2 =
0.5-7 and
oxide impurities = <1
______________________________________
and an aqueous slurry of an inorganic binder selected from the group
consisting of Portland cement, alumina cement, calcium silicate, lime and
gypsum is cast about said fibers as a reinforcement to form a building
material.