METHOD AND APPARATUS FOR USING BLAST-FURNACE SLAG IN CEMENT CLINKER PRODUCTION

摘要

A process and apparatus by which crushed and screened blast furnace slag (80) can be added to the feedstock materials (76) fed into the feed-end of a rotary cement kiln to form cement clinkers (82). The blast furnace slag is crushed and screened to provide blast furnace slag particles having particles with a size of up to a maximum diameter of substantially 2" or less. The apparatus (10) includes a rotary kiln (12) supported by flanges (14) that rotate with the kiln. The kiln has a feed end (16) and a burning zone (18). A fuel source (20) creates a flame (22) in the heat end of the rotary kiln. A variable speed conveyer belt (24) carries feedstock material to the kiln and the blast furnace slag (44) is carried by a conveying device (46) to the feedstock material (48) that is being fed through the dust hopper (56) at the feed end of the kiln.