PROCESS OF PREPARING RAW MIX FOR PRODUCTION OF PORTLAND CEMENT CLINKER Russian patent published in 2004 - IPC

FIELD: manufacture of building materials.

SUBSTANCE: in a process of preparing raw mix for production of Portland cement clinker according to wet method, clay-carbonate slurry is prepared from clay and carbonate components and water at weight ratio of solid components 1:3 to 1:15. Simultaneously, adjusting slurry is prepared as two separate slurries: first one from carbonate and silica components plus water at weight ratio of solid components 1:1 to 6:1 and second one from clay component and water. This second slurry is poured into slurry bath so filling 10 to 50% of the bath volume, after which first slurry is added into the bath and the mixture is stirred to form above-mentioned adjusting slurry. The latter is added to clay-carbonate slurry to produce raw mix containing 5-15% clay component, 0.6-4.0% silica component, 36-50% carbonate component and balancing amount of water. Clay-carbonate or adjusting slurry may also be completed by 5% iron additive (in a dry weight).

EFFECT: increased sedimentation stability of raw mix caused by use of conventional materials.

2 cl, 2 tbl, 2 ex