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High efficiency and energy saving fly ash sintered brick making method

A technology for fly ash and sintered bricks, applied in the field of preparation of fly ash sintered bricks, can solve the problems of large drying shrinkage, influence of product strength, easy deformation of wet blanks, etc. Risk of deformation, improved effectiveness of drying contact surfaces

Active Publication Date: 2014-11-05
西安瑞泰机械设备制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When using shale powder with this particle size, the amount of fly ash is generally controlled below 25 wt%, otherwise it will be difficult to achieve a satisfactory product qualification rate, and the product strength will be affected. A lot of high-quality coal needs to be thrown out manually, and the energy consumption is high
However, when a higher amount of fly ash is used, the wet body of fly ash sintered brick has low strength, large drying shrinkage, and large residual moisture. As a result, under the traditional process conditions, the wet body is easily deformed, cracked, and the strength is low. rate is not high
And under the traditional production conditions, when the fly ash with high sulfur content from the power plant is used, the corrosion damage to the roof of the sintering kiln is great, and the maintenance and maintenance costs of the kiln body are high, which is not suitable for long-term large-scale industrial production

Method used

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  • High efficiency and energy saving fly ash sintered brick making method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Prepare materials by weight:

[0026] Material name Parts by weight

[0027] 62 parts of fly ash

[0028] Hard Shale 38 parts

[0029]The hard shale is sent to the hammer crusher for crushing, and then sent to the pendulum mill for further refining treatment. The particle size of the shale powder after refining treatment is below 2mm, and the particles below 1mm account for 82 wt. %, particles below 0.25mm accounted for 35 wt%. Feed the fly ash and finely ground shale powder into the rod mixer for mixing; after mixing evenly, send them into the first double-shaft mixer, add room temperature water for stirring; after stirring evenly , sent to the second twin-shaft mixer, based on the total weight of the fly ash and the refined shale powder, 15 wt% of hot water at 90 degrees was added for stirring.

[0030] Afterwards, the stirred material is sent to the aging warehouse for aging for more than 72 hours. The aged material is extruded through a two-stage vacuum brick e...

Embodiment 2

[0034] Prepare materials by weight:

[0035] Material name Parts by weight

[0036] 65 parts of fly ash

[0037] Hard Shale 35 parts

[0038] The hard shale is sent to the hammer crusher for crushing, and then sent to the pendulum mill for further refinement. The particle size of the shale powder after refinement is below 1.8mm, and the particles below 1.5mm account for 85 wt%, particles below 0.25mm accounted for 40 wt%. Send the fly ash and ground shale powder into the rod mixer for mixing; after mixing evenly, send them into the first double-shaft mixer, add room temperature water for stirring; after stirring evenly, send them into In the second twin-shaft mixer, based on the total weight of the fly ash and the refined shale powder, add 18% water or steam for stirring.

[0039] Afterwards, the stirred material is sent to the aging warehouse for aging for more than 72 hours. The aged material is extruded through a two-stage vacuum brick extrusion machine, the extrusion ...

Embodiment 3

[0043] Prepare materials by weight:

[0044] Material name Parts by weight

[0045] 70 parts of fly ash

[0046] Clay 30 parts

[0047] The rest of the preparation process is the same as in Example 1, the difference is only that the clay is crushed using a high-speed finely crushed pair of rollers, and the firing temperature is set at 1080°C. o C

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Abstract

The invention provides a high efficiency and energy saving fly ash sintered brick making method. The optimization of granularity graduation of shale powder and the introduction of a single layer drying process capable of realizing large-scale continuous production solve the problems of low strength and easy deformation of green bricks in the drying process of ultrahigh-content fly ash sintered bricks, and multi-time mixing, forced mixing, heat insulation time prolongation processes further improve the product stability, so the large-scale industrial production of ultrahigh-content fly ash sintered bricks is successfully realized, the sintered bricks obtained in the invention has high yield, excellent strength and reduced weight, and energy consumed by sintering is effectively reduced. The selection of a kiln top and a hanging structure made of a sintered refractory material improves the acid corrosion resistance of a kiln body, can effectively adapt to the production of high--sulfur high-carbon fly ash sintered bricks, solves the problem of difficult utilization of fly ash from a circulating fluidized bed power plant, and improves the resource utilization rate.

Description

technical field [0001] The invention relates to a preparation method of fired bricks for construction, in particular to a preparation method of fly ash fired bricks. Background technique [0002] For a long time, the leading product of my country's brick and tile industry has been solid clay bricks. The preparation of clay bricks has problems such as damaging the environment and high coal consumption. However, the annual discharge of fly ash produced by thermal power plants is high, and the accumulation covers an area of ​​more than 1 million mu, causing serious pollution. The use of fly ash and other wastes to make building bricks is the main direction of developing new wall materials for energy saving, land saving, waste utilization, heat preservation and heat insulation. At the same time, as a resource-saving unit, the circulating fluidized bed unit can effectively use energy with low calorific value. used waste. How to use high dosage and effective use of power plant ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B30/00C04B18/08
CPCY02W30/91
Inventor 赵逸川
Owner 西安瑞泰机械设备制造有限公司
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