Preparation method of autoclaved lightweight high-strength high-fly-ash-content ceramsite

A fly ash, lightweight technology, applied in the field of ceramsite preparation, can solve the problems of difficult control of raw materials, complicated process of fly ash ceramsite, etc., and achieve the effects of expanding utilization channels, improving comprehensive utilization rate, and preventing cracking.

Inactive Publication Date: 2021-01-22
ANHUI GAODI BUILDING MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Chinese patent CN201610826984.8 discloses a method for preparing light-weight and high-strength fly ash ceramsite. The preparation of fly ash ceramsite by this method is complicated, and many pore-forming agents, fluxes, binders, reinforcing agents, etc. need to be added during the preparation process. Admixtures, the raw materials are complex and difficult to control, and the calcination temperature needs to be controlled in real time during the preparation process. The calcination temperature needs to be controlled within 1000°C-1200°C, and the ball forming rate of this method is only 80%.

Method used

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  • Preparation method of autoclaved lightweight high-strength high-fly-ash-content ceramsite

Examples

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Embodiment 1

[0036] A method for preparing autoclaved light-weight, high-strength, high-fly ash-incorporated ceramsite, comprising the following steps:

[0037] Step S1, raw material preparation: drying the desulfurized gypsum at 50°C to constant weight, weighing fly ash, cement, quicklime, water glass, desulfurized gypsum and aluminum powder;

[0038] Step S2, raw material mixing: put 70% fly ash, cement, quicklime, water glass, desulfurized gypsum and aluminum powder into a V-shaped mixing mixer to make a mixture;

[0039] Step S3, preparation of wet material: weigh a certain amount of water, add it into a V-shaped mixing mixer, and prepare a wet material with a certain humidity;

[0040] Step S4: Pour the wet material prepared in step S3 into the ball plate at one time, turn on the ball plate, rotate at a low speed of 280r / min for 2min, then rotate at a medium speed of 560r / min for 2min, and then turn it at a high speed 700r / min, rotate for 2min, the spheres are sticking to each other,...

Embodiment 2

[0048] A method for preparing autoclaved light-weight, high-strength, high-fly ash-incorporated ceramsite, comprising the following steps:

[0049] Step S1, raw material preparation: drying the desulfurized gypsum at 50°C to constant weight, weighing fly ash, cement, quicklime, water glass, desulfurized gypsum and aluminum powder;

[0050] Step S2, raw material mixing: put 70% fly ash, cement, quicklime, water glass, desulfurized gypsum and aluminum powder into a V-shaped mixing mixer to make a mixture;

[0051] Step S3, preparation of wet material: weigh a certain amount of water, add it into a V-shaped mixing mixer, and prepare a wet material with a certain humidity;

[0052] Step S4: Pour the wet material prepared in step S3 into the ball plate at one time, turn on the ball plate, rotate at a low speed of 290r / min for 3min, then rotate at a medium speed of 580r / min for 3min, and then turn it at a high speed 750r / min, rotate for 3min, the spheres are sticking to each other,...

Embodiment 3

[0060] A method for preparing autoclaved light-weight, high-strength, high-fly ash-incorporated ceramsite, comprising the following steps:

[0061] Step S1, raw material preparation: drying the desulfurized gypsum at 50°C to constant weight, weighing fly ash, cement, quicklime, water glass, desulfurized gypsum and aluminum powder;

[0062] Step S2, raw material mixing: put 70% fly ash, cement, quicklime, water glass, desulfurized gypsum and aluminum powder into a V-shaped mixing mixer to make a mixture;

[0063] Step S3, preparation of wet material: weigh a certain amount of water, add it into a V-shaped mixing mixer, and prepare a wet material with a certain humidity;

[0064] Step S4: Pour the wet material prepared in step S3 into the pelletizing tray at one time, turn on the pelletizing tray, rotate at a low speed of 300r / min for 4min, then rotate at a medium speed of 600r / min for 4min, and then turn it at a high speed 800r / min, rotate for 4 minutes, the spheres are sticki...

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Abstract

The invention discloses a preparation method of autoclaved lightweight high-strength high-fly-ash-content ceramsite, which comprises the following steps: preparing raw materials, mixing the raw materials, preparing a wet material, performing balling by a balling disc, performing screening, performing natural curing, carrying out moisturizing curing, carrying out autoclaved curing and the like.According to the method, coal ash is mainly used as a main raw material, and the mixing amount of the coal ash reaches 90% or above; The preparation method is a preparation method of the fly ash ceramsitewith a high mixing amount, fly ash is cheap industrial solid waste, and the higher the using amount is, the lower the cost is, so that the cost of unfired fly ash is reduced to a certain extent, meanwhile, the comprehensive utilization way of fly ash is increased, and the comprehensive utilization rate of fly ash is increased. The maintenance process provided by the invention is relatively simpleand effective, cement is hardened through natural maintenance, the ceramsite has certain initial strength, water required by a silicon-calcium reaction is provided for the ceramsite through moisturizing maintenance, the ceramsite is in a humid state, cracking and autoclaved maintenance in the autoclaved maintenance process are avoided, the ceramsite preparation process is simplified, and the utilization rate of raw materials is increased.

Description

technical field [0001] The invention belongs to the technical field of ceramsite preparation, and in particular relates to a method for preparing ceramsite with autoclaved light weight, high strength and high fly ash content. Background technique [0002] The appearance characteristics of the ceramsite are mostly round and oval spheres, and there are also irregular gravel shapes. The interior of the ceramsite is a porous honeycomb structure. There are various types of ceramsite, which can be mainly divided into shale ceramsite, fly ash ceramsite, clay Ceramsite, etc.; fly ash ceramsite can be divided into sintered fly ash ceramsite and non-burning fly ash ceramsite, sintered fly ash ceramsite is mainly made of fly ash, supplemented by clay as a binder , after high-temperature firing, non-fired fly ash is mainly prepared by physically combining fly ash, cement, binder and other raw materials into balls, and then further stimulating the activity of fly ash by natural curing or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/02B28B1/02B28B11/24B28C5/00B28C5/08C04B18/08
CPCC04B18/027B28B1/02B28B11/24B28C5/003B28C5/08Y02W30/91
Inventor 陈传明刘文博王海军刘玉亭田野陈刚
Owner ANHUI GAODI BUILDING MATERIAL CO LTD
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