| 摘要 |
<p>The dust from the waste gases of cement kilns is recovered, the particles which have a too high alkali content are separated and corrective additions are made, if necessary, to the remainder to obtain a good cement. The mixture is introduced directly into the combustion zone or flame of the cement kiln where it is formed into clinker, while the greater part of the alkalies are volatilized and pass into the combustion gases. The dust may be formed into lumps or grains with bitumen before reintroduction to the kiln.</p> |
