Method for producing Portland cement

Abstract

This invention discloses a method for producing Portland cement. The raw materials of the Portland cement comprise steel slag 4-5.5%. The cement clinker is produced with a new dry-method production line, and comprises: limestone 76.6 wt.%, clay 14.1 wt.%, sandstone 4.3 wt.%, and steel slag 5 wt.%. The method can save coal resources, and can utilize waste steel slag.

Description

technical field [0001] The invention relates to cement, in particular to a method for producing Portland cement. Background technique [0002] product name limestone clay sandstone iron powder steel slag original plan 82.7 11.4 4.1 1.8 0 [0003] There is no report on using waste steel slag discharged from steel mills to replace iron powder and some other raw materials to produce Portland cement clinker on a new dry process kiln. Contents of the invention [0004] The purpose of the present invention is to use the waste steel slag discharged from the steel factory to replace the iron powder in the cement clinker raw material to achieve the purposes of waste utilization, energy saving and production cost reduction. [0005] The present invention is implemented as follows: a production method of Portland cement, the raw material formula contains 4%-5.5% steel slag; the clinker is calcined on a new dry...

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Problems solved by technology

[0003] There is no report on using waste steel slag discharged from steel mills to replace iron powder and some other raw materials to produce Portland cement clinker in new dry process kilns