| 摘要 |
<p>PCT No. PCT/AT98/00066 Sec. 371 Date Dec. 8, 1998 Sec. 102(e) Date Dec. 8, 1998 PCT Filed Mar. 12, 1998 PCT Pub. No. WO98/34469 PCT Pub. Date Aug. 13, 1998Sulfate cement or sulfate cement aggregates are produced herein by a process in which hydraulically active synthetic slags having slag basicities CaO/SiO2 of between 1.35 and 1.6, Al2O3 contents of 10% by weight to 20% by weight, and iron oxide contents of below 2.5% by weight are mixed with an earth alkali sulfate in an amount of 5% by weight to 20% by weight, based on the overall weight of the mixture. The hydraulically active synthetic slags can be made by mixing at least one member selected from the group consisting of waste incineration slags and blast furnace slags with steel slags to produce a melt and reducing metal oxides contained in the melt. The earth alkali sulfate is selected from the group consisting of crude gypsum, waste gas gypsum, smoke gas desulfurization plant gypsum, gypsum, or anhydrite in ground or comminuted form.</p> |
