Method and plant for producing cement or other material of given fineness and granular structure

Method of producing cement or material of given fineness and granular structure which comprises delivering material to be reduced into a first individual chamber of a tube mill having at least two adjacent grinding chambers, said chambers having no direct connection with each other, delivering the ground material from each of the chambers to respective coarse-grain separator means associated with said chambers, separating a fines free coarse-grain component in said coarse-grain separator means and returning the coarse-grain component separated in the respective coarse-grain separator means to the chamber associated therewith, feeding the fines component of the respective coarse-grain separator means to the coarse-grain separator associated with a succeeding chamber of the tube mill, feeding the fine-grain component separated in the last of the coarse-grain separators to a fine-grain separator, and returning the coarse-grain component separated in the fine-grain separator to the

Apparatus for producing cement or other material of given fineness and granular structure comprising a tube mill having two grinding chambers with no direct connection with each other, inlet means in a first grinding chamber of said tube mill for introduction of material to be reduced, respective ground material discharge outlets for said grinding chambers, coarse-grain separator means, bucket conveyor means for conveying the ground material discharged from the outlets of each of said grinding chambers to said coarse-grain separator means, means for returning a fines-free coarse-grain component from said separator means to one of said chambers, a fine-grain separator after-connected to said coarse-grain separator means, means for withdrawing a fine-grain component from said fine-grain separator, means for withdrawing a coarse-grain component from said fine-grain separator, and means for returning said latter

Apparatus for producing cement or other material of given fineness and granular structure comprising a tube mill having at least two grinding chambers with no direct connection with each other, inlet means in a first grinding chamber of said tube mill for introduction of material to be reduced, respective ground material discharge outlets for said grinding chambers, a respective coarse-grain separator associated with each of said grinding chambers, a respective bucket conveyor between each of said chambers and the respective coarse-grain separator for conveying ground material discharged from the outlet of each of said grinding chambers to the respective coarse-grain separator, means for delivering a fine-grain component separated in the respective coarse-grain separators from next preceding to next succeeding coarse-grain separators, and a fine-grain separator after connected to the last of said coarse-grain separators.