Method for producing puzzolanic binders for the cement industry from steel slags using a reduction metal bath
US6676747B2 · kind B2 · utility
3Cited by
6References
20Claims
0Family size
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Key dates
| Filing date | Oct 28, 2002 |
| Grant date | Jan 13, 2004 |
| Priority date | — |
| Expiry date | Oct 28, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/50
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
In a method for producing puzzolanic or hydraulic grinding additives for the cement industry from basic oxidic slags, in particular steel slags, using a metal bath for the reduction of metal oxides contained in the slags, the basicities of the liquid slags are adjusted to values lying 0.1 to 0.5 below the basicity value (CaO/SiO2) of the target slag prior to the reduction by adding acidic corrective substances such as, e.g., quartz sand and/or blast furnace slag and/or SiO2-containing corrective substances.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.