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High-alite sulphoaluminate cement clinker and preparation method and application thereof

A technology of special sulfur aluminate and cement clinker, which is applied in the field of cement materials, can solve problems affecting the volume stability and durability of cement and its products, low strength, and affecting construction efficiency, and achieve considerable economic and social benefits , reduce the consumption of resources, reduce the effect of environmental protection hazards

Inactive Publication Date: 2020-11-03
YAOBAI SPECIAL CEMENT TECH R&D CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, Portland cement is currently widely used and has some shortcomings, mainly in: low early strength, which affects construction efficiency; high firing temperature, resulting in high energy consumption: Alite (tricalcium silicate) in cement clinker High content, consumes a lot of high-quality limestone resources, produces a lot of CO2 and waste gas in production, and the environmental pollution is becoming more and more serious; in the later stage of cement hydration, shrinkage cracks are caused due to the volume shrinkage of hardened cement paste, which affects the volume of cement and its products Stability and Durability

Method used

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  • High-alite sulphoaluminate cement clinker and preparation method and application thereof
  • High-alite sulphoaluminate cement clinker and preparation method and application thereof
  • High-alite sulphoaluminate cement clinker and preparation method and application thereof

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preparation example Construction

[0040] The present invention also provides a kind of preparation method of high alite sulfoaluminate cement clinker, described method comprises the following steps:

[0041] S100. Mix the mineralizer with cement raw meal powder to obtain high-alite sulphoaluminate cement raw meal, wherein the mineralizer is made of fluorite ground to a particle size of 80um, with a sieve residue of ≤8% , the cement raw meal powder is a mixed powder of limestone, siliceous material, aluminum material and gypsum, the particle size of the mixed powder is 80um, and the sieve residue is ≤8%;

[0042] S200. Calcining the high-alite sulfoaluminate cement raw meal to obtain the high-alite sulfoaluminate cement clinker.

[0043] In a preferred embodiment, wherein, the mass percentage of the mineralizer and the raw meal powder is 0-2: 100-98, after several trial firing tests, the conversion rate of tricalcium silicate and Physical inspection data is best.

[0044] In a preferred embodiment, wherein, in ...

Embodiment 1

[0051] High alite sulfoaluminate cement clinker, in terms of mass percentage according to the chemical composition, the clinker includes: SiO 2 5%, Al 2 o 3 20%, Fe 2 o 3 5%, CaO 57%, SO 3 13%.

[0052] Wherein, the above-mentioned high alite sulfoaluminate cement clinker is prepared by the following method:

[0053] S100. Mix the mineralizer with cement raw meal powder to obtain high-alite sulphoaluminate cement raw meal, wherein the mineralizer is made of fluorite ground to a particle size of 80um, with a sieve residue of ≤8% , the cement raw meal powder is a mixed powder of limestone, siliceous material, aluminum material and gypsum, the particle size of the mixed powder is 80um, and the sieve ≤ 8%, wherein, the mineralizer and the cement raw material The mass percentage of the raw material powder is 2:98. In the cement raw meal powder, limestone accounts for 55%, siliceous material accounts for 15%, aluminum material accounts for 15%, and gypsum accounts for 15%....

Embodiment 2

[0057] High alite sulfoaluminate cement clinker, in terms of mass percentage according to the chemical composition, the clinker includes: SiO 2 20%, Al 2 o 3 15%, Fe 2 o 3 1%, CaO 49%, SO 3 13%.

[0058] Wherein, the above-mentioned high alite sulfoaluminate cement clinker is prepared by the following method:

[0059] S100. Mix the mineralizer with cement raw meal powder to obtain high-alite sulphoaluminate cement raw meal, wherein the mineralizer is made of fluorite ground to a particle size of 80um, with a sieve residue of ≤8% , the cement raw meal powder is a mixed powder of limestone, siliceous material, aluminum material and gypsum, the particle size of the mixed powder is 80um, and the sieve ≤ 8%, wherein, the mineralizer and the cement raw material The mass percentage of the raw material powder is 1.29:98.71, the limestone accounts for 75%, the siliceous material accounts for 5%, the aluminum material accounts for 10%, and the gypsum accounts for 10% in the ce...

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Abstract

The high-alite sulphoaluminate cement is energy-saving cement which is high in early strength, has micro-expansion and erosion resistance, can be constructed in winter and is stable in strength increase, and is characterized in that the clinker comprises the following components in percentage by weight: 5-20% of SiO2, 10-20% of Al2O3, 1-10% of Fe2O3, 30-60% of CaO and 2-13% of SO3. The saturationratio coefficient of clinker lime is 0.90 + / -0.05; the aluminum rate is 4.5 + / -0.5; the silicon rate is 2.0 + / -0.5, and the sulfur-aluminum ratio is 1.2 + / -0.1. The invention is characterized in thatthe sulphoaluminate cement clinker containing high-content tricalcium silicate can be sintered at 1,250-1,350 DEG C while the burdening scheme is adopted, and the amount of tricalcium silicate in thesulphoaluminate cement clinker sintered within the temperature range is basically zero.

Description

technical field [0001] The invention belongs to the technical field of cement materials, in particular to a high-alite sulphoaluminate cement clinker and its preparation method and application. Background technique [0002] High alite sulfoaluminate cement is made of SiO 2 , Al 2 o 3 , Fe 2 o 3 , CaO, SO 3 The cementitious material obtained after batching, mixing, grinding, firing and grinding of raw materials such as other components, its mineral phase is mainly tricalcium silicate, dicalcium silicate, anhydrous tetracalcium sulfoaluminate, iron Tetracalcium aluminate, etc. [0003] Cement is an important construction raw material, which plays an important role in engineering. However, Portland cement is currently widely used and has some shortcomings, mainly in: low early strength, which affects construction efficiency; high firing temperature, resulting in high energy consumption: Alite (tricalcium silicate) in cement clinker High content, consumes a lot of high-q...

Claims

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Application Information

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IPC IPC(8): C04B7/32C04B7/42
CPCC04B7/32C04B7/425
Inventor 李海宏席峥白明科马慧
Owner YAOBAI SPECIAL CEMENT TECH R&D CO LTD
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