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Coal gangue activator, and novel clinker-free cementing material and preparation method thereof

A technology of cementitious materials and coal gangue, applied in clinker production, cement production, etc., can solve the problems of reducing cement energy consumption, not significantly reducing pollutant gas emissions, and high energy consumption

Inactive Publication Date: 2014-04-02
梅州淦源建材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing research on improving the activity of coal gangue has achieved certain results, but they are all based on coal gangue with high activity itself, and must be activated under high-temperature calcination conditions of 1100 ° C to 1200 ° C, which consumes high energy and has practical application value. not tall
[0009] At present, it has not been possible to achieve a large number of technical reports on the production of new hydraulic cementitious materials that use coal gangue waste slag without silicate clinker. It is impossible to truly realize the large-scale reuse of coal gangue waste slag, and it is impossible to significantly reduce CO in the production process of the cement industry. 2 Reduce the emission of polluting gases and reduce energy consumption in the cement production process

Method used

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  • Coal gangue activator, and novel clinker-free cementing material and preparation method thereof
  • Coal gangue activator, and novel clinker-free cementing material and preparation method thereof
  • Coal gangue activator, and novel clinker-free cementing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] (1) Mix massive coal gangue and shale at a weight ratio of 1.2:1, and use a jaw crusher to crush the mixture until the particle size is less than 1 cm to obtain a granular mixture.

[0068] The coal gangue described in this embodiment is taken from the Shifan area of ​​Meixian County, and the mass percentage of the main chemical composition is: SiO 2 62.00%; Al 2 o 3 18.62%; CaO 1.21%; Fe 2 o 3 4.60%; MgO 0.96%; TiO 2 0.86%;K 2 O 0.93%; Na 2 o 1.22%; loss on ignition 9.55%; other 0.05%;

[0069] The shale is taken from the Baidu area of ​​Meixian County, and the mass percentage of the main chemical composition is: SiO 2 56.67%;Al 2 o 3 19.10%; CaO 1.12%; Fe 2 o 3 4.06%; MgO 0.55%; TiO 2 0.50%;K 2 O 0.84%; Na 2 o 1.08%; loss on ignition 16.01%; other 0.07%.

[0070] Use the mill to grind the relevant raw materials separately, and the specific surface area of ​​the various raw materials after grinding reaches: granulated blast ...

Embodiment 2

[0079] (1) Mix massive coal gangue and shale at a weight ratio of 1.8:1, and use a jaw crusher to crush the mixture until the particle size is less than 1cm to obtain a granular mixture.

[0080] The coal gangue described in this embodiment is taken from the Yongding area of ​​Fujian, and the mass percentage of the main chemical composition is: SiO 2 55.70%;Al 2 o 3 15.87%; CaO 4.62%; Fe 2 o 3 2.04%; MgO 4.02%; TiO 2 0.86%;K 2 O 1.73%; Na 2 O1.22%; loss on ignition 11.89%; other 2.05%.

[0081] The shale is taken from the Baidu area of ​​Meixian County, and the mass percentage of the main chemical composition is: SiO 2 56.67%;Al 2 o 3 19.10%; CaO 1.12%; Fe 2 o 3 4.06%; MgO 0.55%; TiO 2 0.50%;K 2 O 0.84%; Na 2 O1.08%; loss on ignition 16.01%; other 0.07%.

[0082] Use the mill to grind the relevant raw materials separately, and the specific surface area of ​​the various raw materials after grinding reaches: granulated blast furnace slag 447m 2 / kg...

Embodiment 3

[0090] (1) Mix massive coal gangue and shale at a weight ratio of 2.33:1, and use a jaw crusher to crush the mixture until the particle size is less than 1cm to obtain a granular mixture.

[0091] The coal gangue described in this embodiment is taken from the Shifan area of ​​Meixian County, and the mass percentage of the main chemical composition is: SiO 2 62.00%; Al 2 o 3 18.62%; CaO 1.21%; Fe 2 o 3 4.60%; MgO 0.96%; TiO 2 0.86%;K 2 O 0.93%; Na 2 O 1.22%; loss on ignition 9.55%; other 0.05%;

[0092] The shale is taken from the Baidu area of ​​Meixian County, and the mass percentage of the main chemical composition is: SiO 2 56.67%;Al 2 o 3 19.10%; CaO 1.12%; Fe 2 o 3 4.06%; MgO 0.55%; TiO 2 0.50%;K 2 O 0.84%; Na 2 O1.08%; loss on ignition 16.01%; other 0.07%.

[0093] Use the mill to grind the relevant raw materials separately, and the specific surface area of ​​the various raw materials after grinding reaches: granulated blast furnace slag 43...

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Abstract

The invention discloses a coal gangue activator, and a novel clinker-free cementing material and a preparation method thereof. The coal gangue activator is obtained by mixing and roasting a granular mixture, a mixture of one or more than two selected from the group consisting of levigated anhydrite, fluorgypsum and the like, one selected from the group consisting of levigated quicklime, NaOH and NaSiO3 and water, wherein the granular mixture is obtained by mixing coal gangues and shales according to a weight ratio of (1.0-2.5): 1 and crushing the mixed coal gangues and shale. The novel clinker-free cementing material is prepared by blending and grinding the coal gangue activator, one selected from the group consisting of levigated quicklime, NaOH and NaSiO3, levigated granular blast furnace slag and a reinforcing grinding aid. According to the invention, activation of the coal gangues under the condition of low temperature calcining is realized by using arenaceous coal gangues having a low content of clay minerals and the shale, and the granular blast furnace slag is further compounded to successfully substitute a cement clinker; therefore, resourceful treatment of the coal gangues is realized and environmental pollution is reduced.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a coal gangue activated substance and a preparation method thereof, and a novel clinker-free cementitious material prepared by using the coal gangue activated substance. Background technique [0002] As a good building material, cement has gone through a glorious history of more than 170 years. Because it has the property of being compatible with the earth's environment and the atmosphere, it is an ecological product itself, and it is also a basic material that can promote the development of the national economy and improve the material and cultural living standards of human beings. The demand is huge. However, the cement industry also seriously pollutes the environment on which human beings depend. Due to the use of a large amount of limestone as raw material in the production process of traditional cement, a large amount of CO will be produced after hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/14C04B7/21C04B7/36
CPCY02P40/10Y02P40/121
Inventor 林勇康佘晓燕吴小淦
Owner 梅州淦源建材科技有限公司
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