| Patent Number |
Title Of Patent |
Date Issued |
| 4259081 |
Process of calcining limestone in a rotary kiln |
March 31, 1981 |
| A process for the calcining of limestone or hydrated lime by thermal treatment thereof with hot gases in a rotary kiln through which the kiln atmosphere and the charge are countercurrently passed, which kiln is fed with solid carbonaceous fuel, is described. The invention resides in |
| 4247323 |
Process of directly reducing iron oxide-containing materials |
January 27, 1981 |
| When in the direct reduction of iron-oxide-containing materials in a rotary kiln solid, carbonaceous reducing agents having a high content of volatile constituents are charged to the rotary kiln at its charging end, a reoxidation of the sponge iron can readily occur in the final portion |
| 4238222 |
Waelz process of volatilizing zinc and lead from iron oxide-containing materials |
December 9, 1980 |
| In a Waelz process of volatilizing zinc and lead from iron-containing and oxide-containing material in an inclined rotary kiln, which is charged at its upper end with the material together with solid carbonaceous reducing agent having a high content of volatile combustible constituents, |
| 4181520 |
Process for the direct reduction of iron oxide-containing materials in a rotary kiln |
January 1, 1980 |
| Iron oxide-containing materials, such as iron ores, are directly reduced to produce sponge iron by a treatment with solid carbonaceous reducing agents in a rotary kiln at temperatures below the softening and melting point of the charge wherein the kiln atmosphere flows opposite to the di |
| 4179280 |
Direct-reduction process carried out in a rotary kiln |
December 18, 1979 |
| A process for directly reducing iron oxide-containing materials to provide sponge iron by heating said iron oxide-containing materials in a rotary kiln while employing a solid carbonaceous reducing agent having a high content of volatile combustible components, wherein oxygen-containing |
