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Production technology for concrete building block of autoclaving and air entraining of circulating fluid bed fly ash

A circulating fluidized bed, concrete block technology, used in manufacturing tools, clay preparation devices, mixing operation control, etc.

Active Publication Date: 2009-10-28
FUJIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Due to the differences in the physical and chemical properties of circulating fluidized bed fly ash and ordinary fly ash, the resource utilization process for ordinary fly ash is no longer suitable for the resource utilization process of circulating fluidized bed fly ash

Method used

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  • Production technology for concrete building block of autoclaving and air entraining of circulating fluid bed fly ash
  • Production technology for concrete building block of autoclaving and air entraining of circulating fluid bed fly ash

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment one, such as figure 2 Shown:

[0043] 1. Raw material preparation

[0044]A. Grind 60 parts of circulating fluidized bed fly ash with a ball mill until the particle size is between 22-24um, add 54 parts of water and 1 part of additive and stir to make a slurry and store it in a slurry tank for later use. The slurry is fine The density is 12-16% (4900-hole square-hole sieve);

[0045] B. Crushing quicklime and gypsum with a jaw crusher respectively, then take 16 parts of quicklime after crushing and 3 parts of gypsum and mix them with a ball mill until the fineness is 8-15% (4900-hole square-hole sieve residue), then store Stand by in the mixing silo;

[0046] C. Measure 1 part of additive, 7 parts of cement, 0.07 part of aluminum powder, and 6 parts of water respectively and store them for later use.

[0047] 2. Feeding and stirring

[0048] First put the slurry of circulating fluidized bed fly ash into the mixer and start the mixer, then add the mixtur...

Embodiment 2

[0057] Embodiment two, still refer to figure 2 Shown:

[0058] 1. Raw material preparation

[0059] A. Grind 70 parts of circulating fluidized bed fly ash with a ball mill until the particle size is between 22-24um, add 63 parts of water and stir to make a slurry and store it in a slurry tank for later use;

[0060] B. Crushing quicklime and gypsum through a jaw crusher respectively, then take 23 parts of quicklime and 4 parts of gypsum after crushing, mix them with a ball mill and store them in a mixing bin for later use;

[0061] C. Measure 3 parts of additives, 10 parts of cement, 0.12 parts of aluminum powder, and 7 parts of water, respectively, and store them for later use.

[0062] 2. Feeding and stirring

[0063] Put the slurry of circulating fluidized bed fly ash into the mixer first, then start the mixer, then add the mixture of quicklime and gypsum and cement, and finally add aluminum powder and continue stirring for three minutes before stopping.

[0064] 3. Po...

Embodiment 3

[0072] Embodiment three, still refer to figure 2 Shown:

[0073] 1. Raw material preparation

[0074] A. Grind 65 parts of circulating fluidized bed fly ash with a ball mill until the particle size is between 22-24um, add 60 parts of water and stir to make a slurry and store it in a slurry tank for later use;

[0075] B. Crushing quicklime and gypsum through a jaw crusher respectively, then take 20 parts of quicklime and 3.5 parts of gypsum after crushing, mix them with a ball mill and store them in a mixing silo for use;

[0076] C. Measure 2 parts of additives, 9 parts of cement, 1 part of aluminum powder, and 5 parts of water respectively and store them for later use.

[0077] 2. Feeding and stirring

[0078] First put the slurry of circulating fluidized bed fly ash into the mixer and start the mixer, then add the mixture of quicklime and gypsum and stir for 60s, then add cement and stir for 60s, finally add aluminum powder and continue stirring for 60s before stopping....

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Abstract

The invention discloses a production technology for a concrete building block of autoclaving and air entraining of circulating fluid bed fly ash, which comprises the steps of raw material preparation, feeding, stirring, pouring, stationary primary maintenance, cutting, autoclaving and finished product obtaining. The raw material proportion in the step of raw material preparation is as follows: 60 to 70 parts of circulating fluid bed fly ash, 16 to 23 parts of quick lime, 3 to 4 parts of plaster, 7 to 10 parts of cement, 0.07 to 0.12 part of aluminum powder, 60 to 70 parts of water, and 1 to 3 parts of additive, wherein the additive is a water reducing agent, Na2SO4 and CaCl2, and the proportion of the water reducing agent, the Na2SO4 and the CaCl2 is 1:1:1. According to the property of the circulating fluid bed fly ash, the invention improves the production technology for the concrete building block of autoclaving and air entraining of common fly ash, uses the additive for inhibiting and reducing the volume expansion caused by the formation of ettringite after the material is hardened, improves the technical flow, and realizes the higher economic value of the circulating fluid bed fly ash.

Description

【Technical field】 [0001] The invention relates to a method for utilizing fly ash, in particular to a production process for producing aerated concrete blocks by using circulating fluidized bed fly ash. 【Background technique】 [0002] Autoclaved aerated concrete block is a light-weight building material. Its main feature is a wide source of raw materials. Compared with traditional clay bricks, it has the advantages of sound insulation, heat preservation, fire prevention, and light weight. The existing autoclaved aerated concrete block The main raw material of concrete blocks is wet ash, and its manufacturing process is: feeding and mixing, pouring, static stop for initial curing, cutting, and autoclaving to obtain finished products. The autoclaving step is a process system of constant pressure steam curing, the strength of this kind of autoclaved aerated concrete block is low, and its scope of application is limited to a certain extent. [0003] China Invention Application N...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B1/00B28C7/04B28C5/08B28B1/14
CPCC04B28/10Y02W30/91C04B7/02C04B18/08C04B22/124C04B22/143C04B22/147C04B38/02C04B38/10C04B40/024C04B2103/302
Inventor 刘心中翁仁贵
Owner FUJIAN UNIV OF TECH
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