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Portland cement clinker and preparation method thereof

A technology for Portland cement and cement clinker, which is applied in the field of building materials, can solve problems such as environmental pollution, and achieve the effects of high strength, wide sources and increased dosage.

Active Publication Date: 2014-09-24
CHINA BUILDING MATERIALS ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this invention is to propose a kind of preparation method of Portland cement clinker, make Alite in the prepared Portland cement clinker be the R type of high activity, improve clinker strength, to solve the need to change in the prior art The clinker sintering process or the need to add heavy metals Zn, Cu or F to cause environmental pollution

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

[0038] The mineral composition of the designed clinker is C 3 S: 61%, C 2 S: 20%, C 3 A: 7% and C 4 AF: 12%, raw material rate values ​​are KH=0.898, n=2.5, p=1.31, MgO content in clinker is 2%, with CaHPO 4 2H 2 The phosphorus-containing raw material based on O mineral form is a phosphorus source (the following examples are all the same), and the amount of phosphorus introduced in the clinker is 1%P 2 o 5 . As a comparison A does not contain magnesium and phosphorus in the clinker; as a comparison B contains magnesium but does not contain phosphorus in the clinker; as a comparison C does not contain magnesium but contains phosphorus in the clinker. The chemical composition of the obtained cement clinker is shown in Table 1. According to the calculated ratio of raw materials, the raw materials are mixed and mixed evenly. The mixed raw materials are calcined in a high-temperature furnace at 1450°C and then quenched. The cooled clinker is crushed and ground, and the spec...

Embodiment 2

[0046] According to the current chemical composition and mineral composition of my country's benchmark clinker for cement (hereinafter referred to as benchmark clinker), the mineral composition of the designed clinker is C 3 S: 60%, C 2 S: 23%, C 3 A: 7% and C 4 AF: 10%, raw meal rate values ​​are KH=0.887, n=2.95, p=1.44, MgO content in clinker is 2.57%, phosphorus introduction in clinker is 0.6%P 2 o 5 , see Table 3 for the chemical composition of the clinker. According to the calculated ratio of raw materials, the raw materials are mixed and mixed evenly. The mixed raw materials are calcined in a high-temperature furnace at 1450°C and then quenched. The cooled clinker is crushed and ground, and the specific surface area of ​​the clinker fineness is controlled to (340±20)m by using Blaine’s specific surface area measuring instrument. 2 / kg.

[0047] Table 3 Chemical composition of clinker

[0048]

[0049] figure 2 The diffraction peaks in the ranges of 32°~33° a...

Embodiment 3

[0054] According to the current chemical composition and mineral composition of my country's benchmark cement special clinker, the design clinker mineral composition is C 3 S: 60%, C 2 S: 23%, C 3 A: 7% and C 4 AF: 10%, raw meal rate values ​​are KH=0.887, n=2.95, p=1.44, MgO content in clinker is 2.56%, phosphorus introduction in clinker is 1%P 2 o 5 The ingredients and clinker chemical composition are shown in Table 5. According to the calculated ratio of raw materials, the raw materials are mixed and mixed evenly. The raw materials are calcined in a high-temperature furnace at 1450°C and then quenched. The cooled clinker is crushed and ground, and the specific surface area of ​​the clinker fineness is controlled to (340±20)m by using Blaine’s specific surface area measuring instrument. 2 / kg.

[0055] Table 5 Chemical composition of clinker

[0056]

[0057] According to GB / T17671-1999, the compressive strength test was carried out on the clinker samples. The wat...

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Abstract

The invention discloses a Portland cement clinker which contains trace magnesium and trace phosphorus, and R type Alite accounting for 52wt%-65wt%. The invention also discloses a preparation method of the Portland cement clinker; the preparation method comprises the following steps: step 1, selecting raw material components according to the composition of the desired cement clinker and determining the weight proportion of each raw material component, wherein the raw material components include at least one magnesium raw material and at least one phosphorus raw material; step 2, thoroughly mixing the raw material components, and then performing high-temperature calcination on the mixture, and then quickly cooling to a room temperature, thereby obtaining the cement clinker; in the cement clinker, the weight percentage of the phosphorus content in terms of the oxide P2O5 is 0.5%-1.2%, while the weight percentage of the magnesium in terms of the oxide MgO is 1%-5%. The Portland cement clinker prepared by the preparation method contains R type tricalcium silicate, and the compressive strength of the clinker can be greatly improved in contrast with the clinker prepared by use of other methods.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a Portland cement clinker and a preparation method of the Portland cement clinker. Background technique [0002] Portland cement has been used since its invention and is the most widely used inorganic cementitious material. my country's cement output has ranked first in the world for more than 20 consecutive years. In 2013, it reached 2.41 billion tons, accounting for about 60% of the world's total cement output, of which Portland cement accounted for more than 98%. The huge quantity meets the needs of national construction, but the overall quality is still far from the world's advanced level: low intensity and high energy consumption restrict the sustainable development of the industry. [0003] Portland cement is prepared by mixing Portland cement clinker with a small amount of gypsum and admixtures. Good quality cement mainly depends on clinker. The mineral compo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/42C04B7/02
Inventor 张文生任雪红叶家元王宏霞汪智勇张洪滔王渊
Owner CHINA BUILDING MATERIALS ACAD
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