Installation and method of burning cement raw

摘要

Extensive improvements in the production capability of the existing installations of the type comprising a rotary kiln and a suspension preheater unit are disclosed; that is, another suspension preheater unit provided with a calciner at its lowermost heat transfer stage and a distributor to direct a part of the preheated raw materials from the existing preheater to the calciner are installed, and all the raw materials supplied to two preheater units are uniformly and highly calcined ahead of the kiln in the preheaters by control of the distributor as well as the fuel rate to the calciner, thereby the production capacity of the kiln is doubled. Furthermore the accumulation of raw materials on the bottom of the calciner can be substantially eliminated and the specific power consumption of the installations may be reduced.