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Autoclaved flyash-lime brick and preparation method thereof

A technology for autoclaved fly ash bricks and fly ash, which is applied in the field of autoclaved fly ash bricks and its preparation, which can solve the problems of poor physical and chemical properties of finished products, low molding efficiency, and low yield, and achieve improved material ratio , reduce brick drop and reduce product cost

Active Publication Date: 2015-09-02
太原钢铁(集团)有限公司
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve the problems of high cost, low molding efficiency, poor physical and chemical properties of finished products, and low yield, this solution mainly involves the optimization of process and equipment

Method used

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Experimental program
Comparison scheme
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Embodiment 1

[0040] The present embodiment provides a kind of preparation method of autoclaved fly ash brick, specifically comprises the following steps:

[0041] 1. Prepare materials

[0042] a. Fly ash

[0043] The fly ash is pneumatically conveyed by the power plant to two 997m 3 The fly ash tank is stored for use, and the loss on ignition of the fly ash is required to be less than 8%, and the fineness is less than 45% (0.08mm square hole sieve).

[0044] b. Binder

[0045] Requirements for purchased quicklime: ACaO ≥ 60%, digestion speed ≤ 10min (quick ash), digestion temperature ≥ 60°C; incoming massive quicklime is crushed by a jaw crusher and then enters the silo for grinding (required particle size is less than 25mm). Afterwards, the crushed waste bricks that have also been crushed by the jaw crusher enter the ball mill for ball milling according to the weight ratio of 6:1 (the input amount of quicklime is 18 tons / hour, and the input amount of waste bricks is 3 tons / hour). up t...

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Abstract

The invention discloses an autoclaved flyash-lime brick and a preparation method thereof, and belongs to the technical field of metallurgical solid waste resource comprehensive utilization. The autoclaved flyash-lime brick is prepared from the following raw materials in percentage by weight: 40-50% of flyash, 0-30% of coarse slag, 0-30% of crushed stone, 0-15% of water granulated slag, 0-12% of calcined lime and 0-8% of fly ash. The preparation method of the autoclaved flyash-lime brick is high in production efficiency, good in formation quality, low in price and high in profit margin, and comprises the steps of ingredient stirring, digesting, forming and steam boiling so as to obtain the finished product. Related raw material replacements are sought and the optimal process control parameter is explored, so as to be applied to the production line after laboratory tests, the material quality is improved, the material ratio is effectively improved, the product cost is reduced, the phenomena of brick falling, brick collapse and the like in the formation process are greatly reduced, and the formation efficiency and the finished product appearance quality are greatly improved.

Description

technical field [0001] The invention relates to an autoclaved fly ash brick and a preparation method thereof, belonging to the technical field of comprehensive utilization of metallurgical solid waste resources. Background technique [0002] In the construction industry, solid clay bricks are still widely used as the main building materials, which not only consumes a lot of land resources, but also causes great damage to the environment due to the high energy consumption and extensive production methods of clay bricks. As a new type of energy-saving material, fly ash brick has excellent product performance, which can not only save resources, but also improve building functions. [0003] At present, in the field of autoclaved fly ash brick production, fly ash, cement and aggregate are mostly used as the main raw materials. After the raw materials are processed, they are stirred, mixed, digested, formed, and steam cured according to a certain ratio to obtain the finished produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/10
Inventor 龚运林张美霞
Owner 太原钢铁(集团)有限公司
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