Method and apparatus for modifying pozzolanic activity of mineral material

A technology of volcanic ash activity and mineral materials, which is applied in the fields of climate sustainability, solid waste management, sustainable waste treatment, etc. The effect of reducing dosage and increasing pozzolanic activity

Inactive Publication Date: 2012-06-27
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low dosage of the excitation material, generally less than 1% of the mass of the mineral material, it is difficult to fully mix it with the mineral material by dry mixing or mixed grinding. Due to the limitation of the solubility of the excitation

Method used

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  • Method and apparatus for modifying pozzolanic activity of mineral material
  • Method and apparatus for modifying pozzolanic activity of mineral material
  • Method and apparatus for modifying pozzolanic activity of mineral material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1, the steps are as follows:

[0024] (1) Pack a class II fly ash material of a power plant in the feed bin 2;

[0025] (2) Put the aqueous solution of calcium hydroxide modifier with a mass concentration of 16% into the heating container 6, open the atomizer 7, and make the aqueous calcium hydroxide solution enter the fluidization through the water pipe 11 and the nozzle 12 after atomization treatment In bed container 3;

[0026] (3) Open the valve of the nitrogen cylinder to allow nitrogen to enter the fluidized bed container 3 through the air pipe 9;

[0027] (4) Open the valve of the feed bin 2 to allow the fly ash to enter the fluidized bed container 3, and adjust the valve of the feed bin and the nitrogen cylinder valve so that the fly ash is suspended in the fluidized bed container 3;

[0028] (5) After the suspended fly ash is fully mixed with atomized particles containing calcium hydroxide in the fluidized bed container 3, it enters the decompressi...

Embodiment 2

[0036] Embodiment 2, the steps are as follows:

[0037] (1) A kind of S95 grade ore powder is installed in the feed bin 2;

[0038] (2) Put the sodium hydroxide aqueous solution with a mass concentration of 20% into the modifier container 6, open the atomizer 7, and make the sodium hydroxide solution enter the fluidized bed container through the water pipe 11 and the nozzle 12 after atomization treatment 3 middle;

[0039] (3) Open the outlet valve of the air compressor, so that the air enters the fluidized bed container 3 through the air pipe 9;

[0040] (4) Open the valve of the feeding bin 2 to make the mineral powder enter the fluidized bed container 3, adjust the valve of the feeding bin and the outlet valve of the air compressor, so that the mineral powder is suspended in the fluidized bed container 3;

[0041] (5) After the suspended mineral powder is fully mixed with the atomized sodium hydroxide solution particles in the fluidized bed container 3, it enters the deco...

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PUM

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Abstract

The invention relates to a method and an apparatus for modifying the pozzolanic activity of a mineral material. The apparatus comprises devices of a gas bottle, a feeding cabin, a fluidized bed container, a pressure reduction cylinder, a finished product collection container, a modifier container, an atomizer, a nozzle, a dust collector and the like, and gas tubes, a water tube, a material tube and a heating tube for connecting the devices. The method concretely comprises the following steps: fully mixing an atomization modifier with the mineral material in the fluidized bed container, and carrying out thermal treatment by the heating tube to make modifier particles and mineral particles be tightly combined, wherein the modifier can most effectively excite the hydration activity of the mineral material. The method has the characteristics of high efficiency of the mixing of the modifier with the mineral material, and good excitation effect on the hydration activity of the mineral material.

Description

technical field [0001] The invention relates to a mineral material pozzolanic active modification method and a modification device. Background technique [0002] Mineral materials with pozzolanic activity such as slag powder and fly ash have been widely used in concrete. Their role is not only to achieve energy conservation and environmental protection through the use of industrial waste residues, but more importantly, through the application of these materials, the performance of concrete has been significantly improved. . The reaction between mineral materials and cement hydration product calcium hydroxide is called pozzolanic reaction, and its reaction ability is called pozzolanic activity or hydration activity of mineral materials. Due to the low pozzolanic activity of some mineral materials such as fly ash, the strength of concrete prepared by using them instead of cement, especially the early strength, is reduced, thus limiting its content in concrete. [0003] The p...

Claims

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Application Information

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IPC IPC(8): C04B18/12
CPCY02W30/91
Inventor 朱洪波李晨王文轩
Owner TONGJI UNIV
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