Method for preparing rapid hardening high-early-strength cement clinker

A technology for early-strength cement and cement clinker, applied in the field of building materials, can solve problems such as polluting the environment and occupying land, and achieve the effects of low energy consumption, high post-strength guarantee, and significant economic and social benefits.

Active Publication Date: 2013-02-20
TIANJIN CEMENT IND DESIGN & RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, the stockpiling of these ore dressing tailings will bring a series of problems such as pol

Method used

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  • Method for preparing rapid hardening high-early-strength cement clinker
  • Method for preparing rapid hardening high-early-strength cement clinker

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1) Selection of raw materials

[0017] Raw materials having four chemical compositions as follows (see Table 1) were used.

[0018] Table 1 Chemical composition of four kinds of raw materials

[0019]

LOSS

SiO 2

Al 2 o 3

Fe 2 o 3

CaO

MgO

TiO 2

K 2 o

Na 2 o

SO 3

Limestone 1

43.66

0.50

0.20

0.14

54.20

1.10

0.00

0.10

0.20

0.03

Bauxite tailings 1

10.43

27.13

44.04

12.06

0.80

0.76

2.02

2.41

0.37

0.62

fly ash 1

5.10

53.78

27.46

5.76

4.83

2.02

0.59

0.30

0.11

0.28

plaster 1

3.69

2.24

0.69

0.58

38.76

0.26

0.00

0.13

0.11

53.38

[0020] 2) Weighing of raw materials

[0021] According to the clinker mineral design requirements, it is composed of...

Embodiment 2

[0035] 1) Selection of raw materials

[0036] Raw materials having four chemical compositions as follows (see Table 4) were used.

[0037] Table 4 Chemical composition of four kinds of raw materials

[0038]

LOSS

SiO 2

Al 2 o 3

Fe 2 o 3

CaO

MgO

TiO 2

K 2 o

Na 2 o

SO 3

Limestone 2

41.72

3.54

0.73

0.41

52.74

0.51

0.00

0.09

0.02

0.02

Bauxite tailings 2

11.98

26.58

43.98

11.50

0.98

0.69

2.20

1.33

0.11

0.12

fly ash 2

0.38

54.76

24.90

7.23

5.36

2.30

0.95

1.84

1.26

0.30

plaster 2

20.19

4.08

1.34

0.66

30.55

1.62

0.00

0.26

0.13

40.94

[0039] 2) Weighing of raw materials

[0040] According to the clinker mineral design requirements, according to the...

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Abstract

The invention provides a method for preparing rapid hardening high-early-strength cement clinker. Limestone, monohydrallite milltailings, ordinary coal ash and gypsum serve as raw amterials, rapid hardening high-early-strength Belite sulphate aluminium cement clinker is calcined at the temperatures of 1350+/-20 DEG C, the clinker comprises, by weight, 50-52% of C2S, 28-30% of C4A3S and 16-18% of C4AF and a small quantity of amorphous phase substances. According to the method, most of the used aluminous materials are monohydrallite milltailings which are industrial residues which are discharged by aluminium factories, the initial setting time of the obtained clinker is less than 5 minutes, more than 30MPa of the strength of 6 hours can be achieved, and at the same time, the 28d strength of the clinker can reach about 55 MPa.

Description

technical field [0001] The invention relates to cement materials in the field of building materials, in particular to a method for preparing rapid-hardening early-strength Belite sulphoaluminate cement clinker. Background technique [0002] my country's bauxite resources are relatively rich, but most of them belong to the diaspore type, and more than 80% of the bauxite has an aluminum-silicon ratio between 5 and 8. The Bayer process commonly used abroad cannot be used to produce alumina. According to the actual situation of my country's alumina mineral resources, to rationally utilize low-grade ore resources, Chinese scientific and technological workers proposed a new process route of "Ore Dressing-Bayer Process to Produce Alumina", and gradually promoted it in various aluminum companies in China, becoming At present, the most important production process in my country's alumina industry. The use of this new production process requires beneficiation of bauxite that is genera...

Claims

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Application Information

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IPC IPC(8): C04B7/36C04B7/32
CPCY02P40/10Y02P40/121
Inventor 姚丕强俞为民单丹吴秋生韩辉彭学平
Owner TIANJIN CEMENT IND DESIGN & RES INST
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