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High silicon iron tailing autoclaved aerated concrete slab and preparation method thereof

A technology of high-silicon iron tailings and autoclaved aeration, applied in the field of building materials, can solve the problems of wasting resources, consuming a lot of money, polluting the environment, etc.

Pending Publication Date: 2021-12-10
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The construction and maintenance of tailings ponds not only cost a lot of money, but also pollute the environment and waste a lot of precious resources

Method used

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  • High silicon iron tailing autoclaved aerated concrete slab and preparation method thereof

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preparation example Construction

[0042] The present application also provides a method for preparing a high-silicon iron tailings autoclaved aerated concrete slab, and the preparation method includes the following steps.

[0043] Step S101, preparation of slurry: put iron tailings, glass slag and 24-28% water (80% of the total water) in a ball mill in proportion to wet grinding until the sieve residue of 0.08mm sieve is less than 25% to obtain iron tailings Mixed slurry of ore and glass slag.

[0044] Step S102, processing steel bars and assembling mesh cages: processing steel bars to make steel meshes, combining the steel meshes and putting them into molds for fixing. Processing the steel bar into a steel bar net further includes derusting, straightening and cutting the steel bar and welding it into a steel bar net.

[0045] Step S103, pouring: Stir the mixed slurry, fly ash, lime, cement and gypsum described in step S101 for 120-150s; then add aluminum powder, graphene and 6-7% water (20% of the total wate...

Embodiment 1

[0053] The high-silicon iron tailings autoclaved aerated concrete slab provided in the first embodiment of the present application comprises 42.5% iron tailings, 4.85% fly ash, 5.25% lime, 9.42% cement, 1.05% % gypsum, 2.75% glass slag, 0.026% graphene, 0.054 aluminum powder, 34.1% water. The preparation method of the above-mentioned high-silicon iron tailings autoclaved aerated concrete slab comprises the following steps:

[0054] Step S101, slurry preparation: put 42.5% iron tailings, 2.75% glass slag and 27.28% water (80%×34.1% water) into a ball mill for wet grinding until the sieve residue of 0.08mm sieve is less than 25%, to obtain iron Mixed slurry of tailings and glass slag. Wherein, the cylinder rotating speed of the ball mill is 380r / min.

[0055] Step S102, steel bar processing and mesh cage assembly: the steel bars are derusted, straightened and cut, and the steel bars are welded into a steel bar mesh. Combine the anti-embroidery-treated steel mesh according to ...

Embodiment 2

[0060] The high-silicon iron tailings autoclaved aerated concrete slab provided in the second embodiment of the present application includes 41.7% iron tailings, 5.16% fly ash, 5.73% lime, 9.8% cement, and 1.21% gypsum in terms of weight percentage , 3.12% glass slag, 0.028% graphene, 0.052 aluminum powder, 33.2% water. The preparation method of the high-silicon iron tailings autoclaved aerated concrete slab provided in the second embodiment includes the following steps.

[0061] Step S101, slurry preparation: put 41.7% iron tailings, 3.12% glass slag and 26.56% water (80%×33.2% water) into a ball mill and wet grind until the sieve residue of 0.08mm sieve is less than 25%, to obtain iron Mixed slurry of tailings and glass slag. Wherein, the cylinder rotating speed of the ball mill is 380r / min.

[0062] Step S102, steel bar processing and mesh cage assembly: the steel bars are derusted, straightened and cut, and the steel bars are welded into a steel bar mesh. Combine the an...

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Abstract

The invention relates to the technical field of building materials, in particular to a high-silicon iron tailing autoclaved aerated concrete slab and a preparation method thereof. The high-silicon iron tailing autoclaved aerated concrete slab comprises the following components in percentage by weight: 40-45% of iron tailings, 4.5-5.5% of fly ash, 5.0-6.0% of lime, 9.0-10.0% of cement, 2.5-3.5% of glass slag, 1.0-1.5% of gypsum, 0.04-0.06% of aluminum powder, 0.02-0.03% of graphene and 30-35% of water. The preparation method comprises the following steps: (1) preparing slurry; (2) processing reinforcing steel bars and assembling a mesh cage; (3) conducting pouring; (4) performing foaming and standing; and (5) carrying out autoclaved curing. The high silicon iron tailing autoclaved aerated concrete slab is low in cost, high in strength, strong in durability, good in thermal insulation performance and low in volume weight.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a high-silicon iron tailings autoclaved aerated concrete slab and a preparation method thereof. Background technique [0002] With the acceleration of my country's industrialization and urbanization process, rapid economic growth, and increased investment in the infrastructure field year by year, the amount of concrete, one of the raw materials for infrastructure construction, is increasing year by year, and there is an urgent need for a huge amount of sand and gravel raw materials. At present, the collection of sand and gravel in my country is mainly obtained through natural sand and gravel, but the collection of natural sand and gravel is far behind the market demand, and sand shortages have appeared in some places, so the price remains high, resulting in the high cost of existing concrete. In view of the current situation that the supply of sand and gravel raw mater...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B38/02C04B18/12C04B14/22C04B14/02C04B22/06
CPCC04B28/144C04B18/12C04B14/22C04B14/024C04B22/064C04B2201/20C04B2201/50C04B18/08C04B7/02C04B22/04C04B38/02C04B7/147Y02W30/91
Inventor 顾晓薇
Owner NORTHEASTERN UNIV
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