Portland cement clinker and preparation method thereof

A technology of Portland cement and clinker, which is applied in the preparation of the Portland cement clinker and the field of Portland cement clinker, can solve problems such as theoretical research blanks, and achieve strong universality, easy operation, and simple methods Effect

Active Publication Date: 2021-02-09
NANJING UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it can be applied to the production process of Portland cement clinker, and it is still a blank in theoretical research and actual production that the M3 type Alite crystal structure can be adjusted to M1 type by adding some trace elements.

Method used

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  • Portland cement clinker and preparation method thereof
  • Portland cement clinker and preparation method thereof
  • Portland cement clinker and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Using analytically pure CaCO 3 , SiO 2 , Al 2 o 3 , Fe 2 o 3 , MgO and desulfurized gypsum for raw meal configuration, the design clinker mineral composition is C 3 S 63.42%, C 2 S 17.70%, C 3 A 8.6%, C 4 AF 10.28%, design clinker rate value KH=0.91, SM=2.60, IM=1.60. The clinker MgO content is 0.5% in the embodiment 1, SO 3 Incorporated in the form of desulfurized gypsum, SO in clinker 3 The content is 0.36%. As a comparison A1 does not contain magnesium and sulfur in the clinker, as a comparison B contains sulfur in the clinker but does not contain magnesium, as a comparison C contains magnesium but does not contain sulfur in the clinker. The raw material is mixed according to the raw material ratio and mixed evenly, then the mixed raw material is calcined, the temperature is raised at 10°C / min during the calcining stage, the temperature is raised to 1500°C, kept for 1 hour, and then cooled at a cooling rate of 60°C / min to room temperature (generally 15-40...

Embodiment 2

[0077] Using analytically pure CaCO 3 , SiO 2 , Al 2 o 3 , Fe 2 o 3 , MgO and desulfurized gypsum for raw meal configuration, the design clinker mineral composition is C 3 S 63.42%, C 2 S 17.70%, C 3 A 8.6%, C 4 AF 10.28%, design clinker rate value KH=0.91, SM=2.60, IM=1.60. The clinker MgO content is 1.5% in embodiment 2, SO 3 Incorporated in the form of desulfurized gypsum, SO in clinker 3The content is 1.09. The comparative A2 contains no magnesium and sulfur in the clinker, the comparative D contains magnesium but no sulfur in the clinker, and the comparative E contains sulfur but no magnesium in the clinker. The raw material is mixed according to the raw material ratio and mixed evenly, then the mixed raw material is calcined, the temperature is raised at 10°C / min during the calcining stage, the temperature is raised to 1500°C, kept for 1 hour, and then cooled at a cooling rate of 60°C / min to room temperature (generally 15-40°C), the fired clinker is ground to...

Embodiment 3

[0089] Using analytically pure CaCO 3 , SiO 2 , Al 2 o 3 , Fe 2 o 3 , MgO and desulfurized gypsum for raw meal configuration, the design clinker mineral composition is C 3 S 63.42%, C 2 S 17.70%, C 3 A 8.6%, C 4 AF 10.28%, design clinker rate value KH=0.91, SM=2.60, IM=1.60. The clinker MgO content is 3.0% in embodiment 3, SO 3 Incorporated in the form of desulfurized gypsum, SO in clinker 3 The content is 2.18%. The comparative A3 contains no magnesium and sulfur in the clinker, the comparative F contains magnesium but no sulfur in the clinker, and the comparative G contains sulfur but no magnesium in the clinker. The raw material is mixed according to the raw material ratio and mixed evenly, then the mixed raw material is calcined, the temperature is raised at 10°C / min during the calcining stage, the temperature is raised to 1500°C, kept for 1 hour, and then cooled at a cooling rate of 60°C / min to room temperature (generally 15-40°C), the fired clinker is ground ...

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Abstract

The invention discloses a Portland cement clinker and a preparation method thereof. According to the Portland cement clinker, M1 type alite accounts for 99% or more of the mass of all alite crystal forms; and the clinker contains a trace amount of magnesium and a trace amount of sulfur, the mass percentage of magnesium is 0.5%-5% in terms of MgO, and the mass percentage content of sulfur is 0.36%-2.94% in terms of SO3. From the perspective of ion regulation and control, magnesium and sulfur elements are introduced simultaneously in the preparation process of a Portland cement raw material, andM3 type alite in the clinker is completely converted into the M1 type alite under the combined action of the magnesium and sulfur elements, so the Portland cement clinker with a higher M1 type alitecontent is stably sintered; and a clinker sintering temperature is reduced, fossil fuel consumption is lowered, greenhouse gas emission is decreased, the multiple effects of energy conservation, emission reduction, consumption reduction and quality improvement are achieved, and an application value is extremely high.

Description

technical field [0001] The invention belongs to the technical field of civil engineering materials, in particular to a Portland cement clinker and a preparation method of the Portland cement clinker. Background technique [0002] my country's cement industry is developing rapidly. In 2019, my country's cement output was nearly 2.33 billion tons, a year-on-year increase of 6.1%, accounting for more than 50% of the world's total cement output, ranking first in the world. Although my country is a big country in cement production, it is not a powerful country. The overall quality of cement is not high, which affects the life of concrete projects in our country. Therefore, the performance of the output cement must be improved. [0003] Portland cement is the cement variety with the largest output, the largest amount of use, and the widest range of applications. It is mainly composed of Portland cement clinker, gypsum and mixed materials. To improve the performance of Portland ce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/02C04B7/44
CPCC04B7/02C04B7/44Y02P40/10C04B7/04C04B7/43C04B7/47C04B2111/00215
Inventor 周昊李晓冬史超其沈晓冬王倩倩于竹青
Owner NANJING UNIV OF TECH
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