Industrial waste slag-doped composite silicate cement and production method thereof

Abstract

The invention discloses industrial waste slag-doped composite silicate cement and a production method thereof. The industrial waste slag-doped composite silicate cement comprises the following material components: 45-58 percent of silicate cement clinker, 3-5 percent of desulfurization gypsum, 1.5-4 percent of lime stone, 0.2-0.3 percent of cement grinding additive, 10-29 percent of granulated blast furnace slag, 2-10 percent of coal slag, 4-10 percent of pulverized fuel ash, 2-10 percent of ferroalloy slag, 2-10 percent of zinc metallurgical slag and 0.2-0.25 percent of waste slag grinding aid active excitant. The production method comprises the following steps of: taking and mixing the first four materials according to the proportion and grinding into 300-350m<2> / kg of powder; taking and mixing the rest six materials according to the proportion and grinding into 420-450m<2> / kg of superfine powder; and then combining the two kinds of powder, stirring and homogenizing. By adopting respective grinding of clinker and waste slag, the waste slag fineness reaches an optical value for stimulating the activity, the hydration progress and the cement clinker reach synchronization, and the doping amount and doping category of waste slag are also improved.

Description

technical field [0001] The invention belongs to the technical field of cement production, and relates to a composite Portland cement and a production method thereof, in particular to a composite Portland cement produced by utilizing industrial waste residues, and a production method of the cement. Background technique [0002] The use of industrial waste residues to produce composite Portland cement not only conforms to the concept of environmental protection, but also has the positive effect of turning waste into treasure and reducing production costs. At present, some cement production enterprises have successfully mixed some industrial waste residues into cement clinker to produce composite Portland cement. However, we can easily see the following deficiencies in the existing disclosed technology of utilizing industrial waste slag to produce composite Portland cement: 1. There are few types of industrial waste slag mixed in, mainly granulated blast furnace slag and fly as...

AI Technical Summary

Problems solved by technology

However, we can easily see the following deficiencies in the existing disclosed technology of utilizing industrial waste slag to produce composite Portland cement: 1. There are few types of industrial waste slag mixed in, mainly granulated blast furnace slag and fly ash; 2. The combined amount is small, the highest ratio is not more than 40%, and the utilization rate of waste residue is not high; 3. The quality of cement is unstable, mainly because the hydration progress of the mixed industrial waste residue is not synchronized with the cement clinker