Process for producing an artificial light-weight aggregate

Details Process for producing an artificial light-weight aggregate Process for producing an artificial light-weight aggregate

1986-01-14

1987-10-20

Capella, Steven

Compositions: coating or plastic

Materials or ingredients

106 97, 106DIG1, 264 66, 501125, 501128, C04B 1806

Patent

active

047012226

ABSTRACT:
A process for producing an artificial light-weight aggregate comprising SiO.sub.2, Al.sub.2 O.sub.3, Fe.sub.2 O.sub.3 and at least one oxide selected from the group consisting of MgO and CaO which has an absolute dry specific gravity of not higher than 1.5, a crushing strength of not less than 55 kfg/cm.sup.2 and a 24 hour water-absorption ratio of not greater than 2.4%. The process comprises granulating a raw powder material comprising SiO.sub.2, Al.sub.2 O.sub.3, Fe.sub.2 O.sub.3 and at least one oxide selected from the group consisting of MgO and CaO, in which the total amount of SiO.sub.2 and Al.sub.2 O.sub.3 is from 75 to 92 wt. %, the weight ratio of Al.sub.2 O.sub.3 /SiO.sub.2 is from 0.25 to 0.70, and the total amount of Fe.sub.2 O.sub.3 and MgO and/or CaO is from 6-20 wt. % and containing at least 80% by weight of a coal ash having a Blaine specific surface area of 2,000 to 9,000 cm.sup.2 /g to give granules having an average apparent specific gravity of 1.1 to 1.8 and a crushing strength of 0.5 kgf/cm.sup.2 or above at 20.degree. C. as well as after heating at 600.degree. C. The granules are calcined at a temperature of 1,100.degree. to 1,600.degree. C. by heating the granules to said temperature at a rate of 150.degree. C./hour to 1000.degree. C./hour when heating said granules from 600.degree. to said temperature.

REFERENCES:
patent: 2948948 (1960-08-01), Duplin, Jr. et al.
patent: 3830776 (1974-08-01), Carlson et al.
patent: 3961973 (1976-06-01), Jones
patent: 4490178 (1984-12-01), Loggers et al.

Affiliated with

Also associated with

Rating

Process for producing an artificial light-weight aggregate does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for producing an artificial light-weight aggregate, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for producing an artificial light-weight aggregate will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1610922