Compositions: coating or plastic – Coating or plastic compositions – Inorganic settable ingredient containing
Patent
1995-06-20
1997-10-14
Green, Anthony
Compositions: coating or plastic
Coating or plastic compositions
Inorganic settable ingredient containing
106699, 106703, 106757, 588254, C04B 752, C04B 1804
Patent
active
056767501
ABSTRACT:
The invention refers to a process of treatment and environment-friendly utilization of asbestos-cement products including a thermal process to transform the asbestos component. Inventively, this is achieved by a coarse reduction of the asbestos-cement products under black side conditions with maintained vacuum. Then, the material is ground to asbestos-cement meal and fed to the flame zone of the rotary kiln of a cement clinker production line. Depending on the fuel type used, the portion of fed asbestos-cement meal varies between 2 and 5%, related to the amount of cement raw meal, substituting 2 to 5% of the cement raw meal mix at a time. The thermal transformation of the asbestos component takes place with temperatures of approximately 1800.degree. C. in the burner zone. The modified residual substance becomes a constituent of the cement clinker due to assimilation in the kiln charge.
REFERENCES:
Kutzer, Hans-Joachim, "Asbestos-Sanierungspsychose?" Warmetechnik Apr. 1993, pp. 193-194.
CA 114:148968, Kavshanskii et al., "Use of Wastes from Asbetos-Cement Manufacture for Manufacturing Portland Cement Clinker," (1990) No Month.
CA 113:45318c, Laszlo et al., "The Use of Asbestos Wastes in Silicate Industry." (1989) No Month.
Ambrosius Stefan
Buhrandt Wolf-Joachim
Gleichmar Gert
Gormar Helmut
Kieser Joachim
Green Anthony
Institut fur Baustoff- und Umweltshcutz-Technologie IBU-tec
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