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Active belite-sulphate aluminum cement clinker and preparation method for active belite-sulphate aluminum cement clinker

A Belite sulfoaluminate and cement clinker technology, which is applied in the field of building materials, can solve the problems of increased difficulty, increased production cost of cement clinker, complicated clinker calcination, etc., and achieves simple ingredients, reduced emissions, and reduced The effect of production costs

Active Publication Date: 2012-07-18
TIANJIN CEMENT IND DESIGN & RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of these trace elements not only increases the production cost of cement clinker, but also makes the calcination of clinker relatively complicated, increasing the difficulty of industrial production

Method used

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  • Active belite-sulphate aluminum cement clinker and preparation method for active belite-sulphate aluminum cement clinker
  • Active belite-sulphate aluminum cement clinker and preparation method for active belite-sulphate aluminum cement clinker
  • Active belite-sulphate aluminum cement clinker and preparation method for active belite-sulphate aluminum cement clinker

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Mix 3.25kg of crushed limestone 1 and 0.45kg of gypsum 1 with 1.30kg of fly ash 1 and grind them in a test ball mill until the sieve residue on an 80 μm square hole sieve is 8-12%. Add raw meal powder to 1% tap water, stir evenly, put it into a round abrasive mold with an inner diameter of 8cm and a depth of 2cm, press it into a cake with a small press, and dry the cake in an oven at 100°C. Take 10 pieces of material cakes each time, put them into a test electric furnace heated to 1320° C. and calcinate for 60 minutes until all the material cakes are completely burned. The calcined clinker is cooled to room temperature by fan blowing.

[0017] The weight percentages of the three raw materials are: 65.0% limestone 1, 26.0% fly ash 1, and 9.0% gypsum 1. Its chemical composition is shown in Table 1.

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

[0019] LOSS

[0020] After crushing the cooled clinker, use a ball mill to grind to a spe...

Embodiment 2

[0028] The fly ash 1 in the implementation case is replaced by another fly ash 2 with higher alumina content, and the limestone and gypsum remain unchanged. The three raw materials are 2.75kg limestone 1, 0.75kg gypsum 1, and 1.50kg powder The ratio of fly ash to 2 is mixed. The preparation method of raw meal and clinker is exactly the same as embodiment case 1.

[0029] The weight percentages of the three raw materials are: 55.0% of limestone, 30.0% of fly ash and 15.0% of gypsum. Its chemical composition is shown in Table 4.

[0030] Table 4 The chemical composition of the three raw materials

[0031] LOSS

SiO 2

Al 2 o 3

Fe 2 o 3

CaO

MgO

TiO 2

SO 3

fly ash 2

2.10

40.62

49.54

2.89

2.24

0.56

1.20

0.20

Limestone 1

43.66

0.50

0.20

0.14

54.20

1.10

0.00

0.03

plaster 1

3.69

2.24

0.69

0.58 ...

Embodiment 3

[0039] The fly ash 2 in the implementation case 2 is replaced by another fly ash 3, the limestone 1 is replaced by limestone 2, and the gypsum 1 is replaced by gypsum 2. The three raw materials are 561kg limestone, 145kg gypsum, and 294kg fly ash 2. The proportions are mixed evenly. Utilize the semi-industrialized vertical mill to grind all the materials until the sieve residue of the 80 μm square hole sieve is 8-12%, and obtain about 1 ton of raw meal powder. Feed the raw meal powder directly into the semi-industrialized kiln, control the appropriate feeding amount and the flow rate of the material in the kiln, ensure that there is sufficient ventilation and oxidizing atmosphere in the kiln, and make the material stay in the high temperature zone of 1300-1380 ° C for 30 -40 minutes, until all the clinker minerals are formed, and the fired clinker is cooled to room temperature by a single cylinder cooler.

[0040] The weight percentages of the three raw materials are: 56.1% o...

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Abstract

The invention discloses active belite-sulphate aluminum cement clinker, which comprises the following mineral compositions in weight percentage: 25-30 percent of beta-type C2S, 25-30 percent of a-type C2S, 28-40 percent of C4A3S`, 4-12 percent of C4AF and 4-8 percent of amorphous-phase substance. The control of different forms and the change of number of the C2S in the clinker are controlled mainly through special setting on clinker ingredient rate values. The invention also discloses a preparation method for the active belite-sulphate aluminum cement clinker. Compared with traditional common silicate cement clinker, the active belite-sulphate aluminum cement clinker has the advantages that more industrial solid waste residues are used in raw materials by the active belite-sulphate aluminum cement clinker, and thereby, the production cost is reduced, the use proportion of limestone is greatly reduced, and the carbon dioxide emission in clinker production is obviously reduced. Under the condition that the water demand and the setting time of the obtained clinker are basically the same as that of the common silicate cement clinker, the strength of the obtained clinker is superior to that of the common silicate cement clinker.

Description

technical field [0001] The invention relates to building materials, in particular to an active belite sulphoaluminate cement clinker capable of reducing carbon dioxide emissions and a manufacturing method thereof. Background technique [0002] In recent years, the content of carbon dioxide in the atmosphere has increased significantly, which has had a significant impact on the world's climate conditions. Reducing carbon dioxide emissions in industrial production has become a common goal of all countries in the world. The cement industry is one of the main sources of carbon dioxide emissions, accounting for about 5% of the total industrial carbon dioxide emissions. Carbon dioxide emitted in cement production mainly comes from the decomposition of limestone, so reducing the proportion of limestone used in cement raw materials can effectively reduce carbon dioxide emissions. At the same time, since the heat consumption of the decomposition of limestone is also the most importa...

Claims

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Application Information

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IPC IPC(8): C04B7/32
CPCY02P40/10
Inventor 俞为民姚丕强刁江京陶从喜吴秋生单丹韩辉李振华王伟
Owner TIANJIN CEMENT IND DESIGN & RES INST
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