A method for preparing unburned bricks or blocks by extracting alumina by-products from fly ash

A technology of fly ash and alumina, applied in cement production and other directions, can solve problems such as no application, and achieve the effects of low price, lower production cost, and enhanced strength

Active Publication Date: 2016-01-20
内蒙古蒙西鄂尔多斯铝业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, it is only used as a raw material in cement clinker calcination, and has no application in other aspects.

Method used

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  • A method for preparing unburned bricks or blocks by extracting alumina by-products from fly ash
  • A method for preparing unburned bricks or blocks by extracting alumina by-products from fly ash
  • A method for preparing unburned bricks or blocks by extracting alumina by-products from fly ash

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Effect test

Embodiment 1

[0019] The invention provides a method for preparing unburned bricks or blocks by extracting alumina by-products from fly ash, comprising:

[0020] Step 1. Pretreatment of raw materials: Grinding silicon-calcium slag, desulfurized gypsum and quicklime respectively to form a powder of ≤180 mesh for future use. Among them, silicon-calcium slag is alumina clinker produced by calcining fly ash and limestone ingredients Solid waste produced after mixing with lye;

[0021] Step 2, first transport 45Kg of silicon-calcium slag, 25Kg of fly ash and 5Kg of desulfurized gypsum to the mixer for mixing and stirring in parts by weight. The stirring time is 5 minutes, and the stirring speed is 150 rpm. While stirring, 13Kg of quicklime and 30Kg of river sand, after stirring evenly, add 5Kg of cement to mix and stir for 3 minutes, and finally add 25Kg of water to stir for 15 minutes, the cement is Portland cement;

[0022] Step 3, forming: transport the mixed material evenly stirred in step ...

Embodiment 2

[0028] The invention provides a method for preparing unburned bricks or blocks by extracting alumina by-products from fly ash, comprising:

[0029] Step 1. Pretreatment of raw materials: Grinding silicon-calcium slag, desulfurized gypsum and quicklime respectively to form a powder of ≤180 mesh for future use. Among them, silicon-calcium slag is alumina clinker produced by calcining fly ash and limestone ingredients Solid waste produced after mixing with lye;

[0030] Step 2, first transport 35Kg of silicon-calcium slag, 15Kg of fly ash and 3Kg of desulfurized gypsum to the mixer for mixing and stirring, the stirring time is 1 minute, and the stirring speed is 130 rpm, while stirring, add 8Kg of quicklime and 15Kg of river sand, after stirring evenly, add 1Kg of cement for mixing and stirring for 1-3 minutes, and finally add 20Kg of water for stirring for 5 minutes, the cement is sulphoaluminate cement;

[0031] Step 3, forming: transport the mixed material evenly stirred in s...

Embodiment 3

[0037] The invention provides a method for preparing unburned bricks or blocks by extracting alumina by-products from fly ash, comprising:

[0038] Step 1. Pretreatment of raw materials: Grinding calcium silicate slag, desulfurized gypsum and quicklime respectively to form a powder of ≤180 mesh for future use, wherein calcium silicate slag is alumina clinker produced by calcining fly ash and limestone ingredients Solid waste produced after mixing with lye;

[0039] Step 2, first transport 40Kg of silicon-calcium slag, 20Kg of fly ash and 4Kg of desulfurized gypsum to the mixer for mixing and stirring in parts by weight. The stirring time is 3 minutes, and the stirring speed is 140 rpm. While stirring, 10Kg of quicklime and 22Kg of river sand, after stirring evenly, add 3Kg of cement and mix and stir for 2 minutes, and finally add 22Kg of water and stir for 10 minutes, and the cement is glass fiber reinforced cement;

[0040]Step 3, molding: transport the mixed material evenly...

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Abstract

The invention discloses a method for preparing a baking-free brick or building block by an aluminum oxide by-product extracted from coal ash. The method comprises the steps as follows: calcium silicon slag, desulfurization gypsum and quick lime are ground respectively to form powder smaller than or equal to 180 meshes for the standby application; following materials in parts by weight: 35-45 parts of calcium silicon slag, 15-25 parts of coal ash, 3-5 parts of desulfurization gypsum, 8-13 parts of quick lime, 15-30 parts of river sand, 1-5 parts of cement and 20-25 parts of water, are mixed and stirred; the uniformly stirred mixture is transported to a forming machine for compression forming treatment to prepare a raw brick; and the prepared raw brick is maintained. The prepared baking-free brick or building block has a good mechanical property and meets the national standard requirement, further, the utilization rates of industrial wastes such as the calcium silicon slag, the coal ash and the like are increased, and the problems that the current emission load of the industrial wastes is overlarge and the industrial wastes cannot be effectively utilized are solved.

Description

technical field [0001] The invention belongs to the field of resource utilization of industrial solid waste, and in particular relates to a method for preparing burn-free bricks or blocks by using fly ash to extract alumina by-products. Background technique [0002] In the process of producing alumina by the fly ash limestone sintering method, the fly ash and limestone ingredients are calcined to generate self-powdered alumina clinker, and the solid waste produced after the clinker is mixed with alkali solution-calcium silicon slag, Its output is large. At present, it is only used as a raw material in cement clinker calcination, and has no application in other aspects. In recent years, with the increase of the country's ban on the use of solid clay bricks, coupled with the domestic waste residue resources and the large demand in the construction market, unburned bricks and blocks have become one of the important new wall materials. Unburned bricks and blocks are made throu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14C04B7/24
CPCY02P40/10
Inventor 高文焕张耀华杨兵魏栋刘增全李军郝耀进秦秀红田新泰白景峰罗永虎
Owner 内蒙古蒙西鄂尔多斯铝业有限公司
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