Controlled process for making a chemically homogeneous melt for producing mineral wool insulation
OwnerBoris Bronshteininventor
Life of this patent
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Abstract
A process for making a homogeneous melt for producing mineral wool insulation. This insulating material is made from waste products namely, bottom ash, cement kiln dust, slag, and waste from mineral wool production. These materials, along with a binder, are homogenized into a mixture. Thereafter, the process includes briquetting the mixture into agglomerated pieces. The agglomerates are then melted in a cupola furnace and the molten agglomerate is discharged into a receiver. Hot combustion gases are then passed into the melt or molten agglomerate to chemically homogenize the melt and heat the melt to preselected temperature. Thereafter, the melt is converted into fibers using conventional practices.
Claims6
A controlled method for making a chemically homogeneous melt for producing light-colored mineral wool which comprises:
- (a) physically homogenizing a mixture of the following formula:
- ______________________________________ Ingredient % By Weight ______________________________________ Mineral Wool Production Waste (.ltoreq.3/4") 20-50 Cement Kiln Dust 15-25 Clay 12-20 Blast Furnace Slag (.ltoreq.3/4") 10-40 Dolomite (.ltoreq.3/4") 0-10 Portland Cement 3-5 Ground Portion of said 5-10 wool production waste (<150 microns) ______________________________________
- (b) briquetting said mixture into agglomerate pieces of predetermined size and shape to a density of 125 to 160 lbs./ft.sup.3 ;
- (c) melting said agglomerate in a cupola furnace;
- (d) discharging the molten agglomerate into a receiver;
- (e) passing hot combustion gases into said melt to chemically homogenize the melt and heat the melt to a predetermined temperature;
- and
- (f) converting said melt into fibers.
A controlled method for making a chemically homogeneous melt for producing a light-colored mineral wool which comprises
- (a) physically homogenizing a mixture of the following formula:
- ______________________________________ Ingredient % By Weight ______________________________________ Cement kiln dust 20-25 Mineral wool production waste 25-45 Silica sand 5-10 Blast furnace slag (.ltoreq.3/4") 10-40 Binder:
- Portland Cement 3-5 Ground portion of said 5-10 wool production waste (<150 microns) ______________________________________
- (b) compacting said mixture into agglomerate pieces of predetermined size and shape to a density of 125 to 160 lbs./ft.sup.3 ;
- (c) melting said agglomerate in a cupola furnace;
- (d) discharging the molten agglomerate into a receiver;
- (e) passing hot combustion gases into said melt to chemically homogenize the melt and heat the melt to a predetermined temperature;
- and
- (f) converting said melt into fibers.
Dependencies are inferred from the claim text.