| 摘要 |
<p>The invention relates to a method and a plant for manufacturing mineralized portland cement clinker. The mineralizer may e.g. be gypsum, fluorine, or a waste product containing these or other mineralizers. By means of the method according to the invention, it will be possible to avoid some of the problems associated with the known technique, since it is possible to utilize the input of the mineralizer as a controllable parameter during the manufacture of mineralized clinker. In order to reduce or eradicate the problems in terms of build-ups and blockages in the preheater cyclones and the riser ducts between the cyclones, the mineralizer may advantageously be added after the cyclone which handles the feed to the calciner, i.e. the last cyclone in the preheater, or the lowermost preheater stage in a plant which does not incorporate a calciner. This involves that there will not be any problems in ensuring a smooth raw meal flow through the preheater, since a substantial deterioration of the flow properties of the raw meal may occur when the mineralizer is added ahead of the preheater, dependent on the type of mineralizer being selected.</p> |
