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Aerated concrete block prepared by doping iron tailings and preparation method thereof

A technology for air-entrained concrete and iron tailings, which is used in applications, ceramic products, household appliances, etc., can solve the problems of high cost, unsatisfactory thermal insulation performance, complicated operation, etc., and achieves low production cost, optimized raw material formula, A wide range of effects

Inactive Publication Date: 2021-04-16
NORTHEASTERN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the process of producing air-entrained concrete blocks in the prior art, there are disadvantages of complicated preparation process and high cost, and the thermal insulation performance of the produced air-entrained concrete block products is not ideal

Method used

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  • Aerated concrete block prepared by doping iron tailings and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The aerated concrete block prepared by mixing iron tailings in this embodiment includes the following raw materials in parts by weight:

[0031] 65 parts of iron tailings, 30 parts of cement, 2 parts of early strength agent, 6 parts of cellulose, 5 parts of rubber powder, 6 parts of polypropylene fiber, 3 parts of aluminum powder, 6 parts of desulfurized gypsum, 2 parts of melamine water reducer, calcium carbide 12 parts of slag and 2 parts of foam stabilizer. The iron tailings are industrial solid wastes produced after iron ore processing, refining and sorting. The chemical composition and mass fraction of the iron tailings described in this embodiment are: SiO 2 60%-70%, CaO 5%-8%, MgO 6%-10%, Al 2 o 3 Accounting for 4%-7%, TFe accounted for 8%-12%, rich in metal oxides.

[0032] Among them: the iron tailings are rationally graded using a vibrating screen machine, screened according to different system sieve tray grid specifications, and the selected particle size ...

Embodiment 2

[0042] The difference between this example and Example 1 lies in the content of the raw materials for preparing the aerated concrete block prepared by mixing iron tailings.

[0043] The aerated concrete block prepared by mixing iron tailings in this embodiment includes the following raw materials in parts by weight:

[0044] 50 parts of iron tailings, 50 parts of cement, 3 parts of early strength agent, 10 parts of cellulose, 8 parts of rubber powder, 10 parts of polypropylene fiber, 5 parts of aluminum powder, 10 parts of desulfurized gypsum, 4 parts of melamine water reducer, calcium carbide 20 parts of slag and 3 parts of foam stabilizer. All the other are with embodiment 1.

[0045] The difference between the method for preparing the aerated concrete block prepared by mixing iron tailings and Example 1 in this embodiment is only:

[0046] The mold poured in step (3) is moved into a constant temperature drying oven at 65°C for 2 hours for molding;

[0047] The process of...

Embodiment 3

[0051] The difference between this example and Example 1 lies in the content of the raw materials for preparing the aerated concrete block prepared by mixing iron tailings.

[0052] The aerated concrete block prepared by mixing iron tailings in this embodiment includes the following raw materials in parts by weight:

[0053] 80 parts of iron tailings, 10 parts of cement, 0.5 parts of early strength agent, 2 parts of cellulose, 2 parts of rubber powder, 2 parts of polypropylene fiber, 0.5 parts of aluminum powder, 2 parts of desulfurized gypsum, 0.5 parts of melamine water reducer, calcium carbide 5 parts of slag and 0.1 part of foam stabilizer. All the other are with embodiment 1.

[0054] The difference between the method for preparing the aerated concrete block prepared by mixing iron tailings and Example 1 in this embodiment is only:

[0055] The mold poured in step (3) is moved into a constant temperature drying oven at 75°C for 4 hours for molding;

[0056] In step (4)...

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Abstract

The invention discloses an aerated concrete block prepared by doping iron tailings and a preparation method thereof. The concrete is prepared from the following raw materials in parts by weight: 50-80 parts of iron tailings, 10-50 parts of cement, 0.5-3 parts of early strength agent, 2-10 parts of cellulose, 2-8 parts of rubber powder, 2-10 parts of polypropylene fiber, 0.5-5 parts of aluminum powder, 2-10 parts of desulfurized gypsum, 0.5-4 parts of a melamine water reducing agent, 5-20 parts of carbide slag and 0.1-3 parts of a foam stabilizer. When the autoclaved aerated concrete block is cured, a mode of combining initial curing and natural curing is adopted, and autoclaved curing is replaced by normal-pressure drying, so that adverse factors such as high energy consumption and harsh conditions during autoclaved curing are effectively avoided; and normal-pressure drying has the advantages of mild conditions and low energy consumption, and is easy for large-scale production. The prepared material has the characteristics of light weight, good heat preservation and insulation effects, high mechanical strength, low production cost and the like, and can effectively realize recycling of the iron tailings and relieve a series of environmental problems caused by accumulation of the iron tailings.

Description

technical field [0001] The invention relates to the technical field of civil engineering materials, in particular to an aerated concrete block prepared by mixing iron tailings and a preparation method thereof. Background technique [0002] Iron tailings are industrial solid wastes produced after iron ore is processed, refined and sorted. The stockpiling of iron tailings not only occupies a large amount of land resources, but also causes serious environmental pollution. Some old tailings ponds also have potential safety hazards. . Since the main chemical components of iron tailings are silicon, aluminum, iron, magnesium, calcium, etc., how to use them reasonably to achieve the effect of waste recycling is a difficult problem in front of people. [0003] After entering the 21st century, the effective utilization of resources is particularly important, and the comprehensive utilization level of tailings has become a measure of a country's technological level and economic devel...

Claims

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Application Information

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IPC IPC(8): C04B38/02C04B28/00C04B111/40
Inventor 顾晓薇迟浩峰刘剑平王诗凝胡子杨刘栋
Owner NORTHEASTERN UNIV
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