Economical, finely controlled cement production
US4026717A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 1975 |
| Grant date | May 31, 1977 |
| Priority date | — |
| Expiry date | Sep 8, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P40/121
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Method and apparatus for manufacturing portland cement characterized by a plurality of steps. First, there is introduced into the feed end of a rotary kiln at a first rate a first mixture containing calcareous material for the cement; and at a second rate a second mixture including at least one of argillaceous material and siliceous material for the cement. Either or both mixtures may be coarsely ground. Next, there is introduced into the combustion zone of the kiln at a third rate a third mixture and a fuel, the third rate of the third mixture being complementary with the second rate of the second mixture and the first rate of the first mixture so as to form a balanced cement clinker for the cement, the cement clinker being discharged from the discharge end of the kiln for further processing into the desired final form of the cement. Also disclosed are more specific embodiments including respective sampling and analysis procedures at a plurality of points in the kiln system and the respective altering of proportions of the mixtures to maintain an exceptionally high degree of on-line control over the quality of the final cement clinker; the admixture of the first and second mixture…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.