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Method for producing aerated concrete block from iron tailings

A kind of technology of aerated concrete and iron tailings, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve problems such as hidden dangers, dangerous environment and safety of tailings dam dam failure, coarse particle size, etc. To achieve the effect of improving the composition, reducing the particle size of tailings, and increasing the content of silicon and aluminum

Inactive Publication Date: 2015-05-06
平泉金盛科技发展有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the amount of iron tailings produced during the mineral processing of metallurgical mines accounts for more than 70% to 90% of the total. Currently, most of the treatment methods for these tailings are tailings filling, dry drainage and stacking, and preparation of new building materials. , tailings filling, dry drainage and dry stacking not only occupy a large amount of land, but also need a lot of manpower and material resources to transfer the tailings, and also bring environmental and safety risks due to the risk of tailings reservoir dam failure Great hidden danger
In the preparation of new building materials, there are many problems that are difficult to solve at present, such as large proportion of tailings, coarse particle size, low strength of the prepared products, sometimes unable to meet the needs of energy-saving building materials, etc.

Method used

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  • Method for producing aerated concrete block from iron tailings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A method for producing an aerated concrete block from iron tailings, comprising the steps of:

[0044] 1) Desliming the low-vanadium-titanium ferro-titanium tailings in advance, and then grinding to obtain a powder with a particle size of less than 0.080mm;

[0045] 2) mixing the powder obtained in step 1) with cement and lime to obtain a mixture, wherein 52wt% of the powder, 25wt% of cement, and 23wt% of lime;

[0046] 3) After mixing the mixture obtained in step 2) with water, add a retarder and an air-generating agent to form a green body; the ratio of water to the mixture is 0.5; The total amount of is benchmark, and described retarder is 4.5wt%, and gas generating agent is 0.15wt%;

[0047] 4) The green body obtained in step 3) is subjected to static precuring for 2 hours, turning over and cutting, and autoclaving at 200° C. and 0.7 MPa for 7 hours to obtain the aerated concrete block.

Embodiment 2

[0049] A method for producing an aerated concrete block from iron tailings, comprising the steps of:

[0050] 1) Desliming the low-vanadium-titanium ferro-titanium tailings in advance, and then grinding to obtain a powder with a particle size of less than 0.015mm;

[0051] 2) mixing the powder obtained in step 1) with cement and lime to obtain a mixture, wherein the powder is 78wt%, cement 5wt%, and lime 17wt%;

[0052] 3) After mixing the mixture obtained in step 2) with water, add a retarder and an air-generating agent and inject and foam it into a green body; the ratio of water to the mixture is 0.8; The total amount is a benchmark, and the retarder is 0.5wt%, and the gas generating agent is 0.05wt%;

[0053] 4) The green body obtained in step 3) is subjected to static precuring for 4 hours, turned over and cut, and autoclaved at 150° C. and 2.0 MPa for 10 hours to obtain the aerated concrete block.

Embodiment 3

[0055] A method for producing an aerated concrete block from iron tailings, comprising the steps of:

[0056] 1) Desliming the low-vanadium-titanium ferro-titanium tailings in advance, and then grinding to obtain a powder with a particle size of less than 0.20mm;

[0057] 2) mixing the powder obtained in step 1) with cement and lime to obtain a mixture, wherein 65wt% of powder, 10wt% of cement, and 25wt% of lime;

[0058] 3) After mixing the mixture obtained in step 2) with water, add a retarder and an air-generating agent to form a green body; the ratio of water to the mixture is 0.64; The total amount of is a benchmark, and the retarder is 2wt%, and the gas generating agent is 0.8wt%;

[0059] 4) The green body obtained in step 3) was subjected to static precuring for 1.5 hours, turned over and cut, and autoclaved at 190° C. and 1.0 MPa for 9 hours to obtain the aerated concrete block.

[0060] According to GB11968-2006, the properties of the air-entrained concrete blocks ...

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Abstract

The invention relates to a method for producing an aerated concrete block from iron tailings. The method comprises the following steps: 1), removing the mud from the iron tailings in advance, then grinding to obtain a powder material; 2), mixing the powder material obtained in the step 1) with cement and lime to obtain a mixed material; 3), stirring and mixing uniformly the mixed material obtained in the step 2) with water, and after size mixing, adding a retarder and a foaming agent into a mould and foaming to obtain a blank; and 4), standing and procuring the blank obtained in the step 3), turning over, cutting, and conducting autoclaved curing at high temperature, to obtain the aerated concrete block. The iron tailings are taken as the main materials, and proper amount of assistants is added to prepare the light energy-saving and environmentally-friendly aerated concrete block, so that the problem of comprehensive utilization of metallurgy solid waste of magnetite tailings is solved, and a novel utilization way is opened up to turn the solid waste of a metallurgical mine into wealth and turn a disadvantage into an advantage.

Description

technical field [0001] The invention relates to a production method of an aerated concrete block, in particular to a method for producing an aerated concrete block from iron tailings. Background technique [0002] Air-entrained concrete block is a new type of building material that is lightweight, porous, thermal insulation, good fire resistance, nailable, sawable, planable, and has certain earthquake resistance. The general weight of aerated concrete blocks is 500-700 kg / m3, which is only equivalent to 1 / 4-1 / 3 of clay bricks and lime-sand bricks, and 1 / 5 of ordinary concrete. It is a lighter type of concrete. It is suitable for filling walls of high-rise buildings and load-bearing walls of low-rise buildings. Using this material can reduce the self-weight of the entire building by more than 40% compared with that of ordinary brick-concrete structures. Due to the reduced weight of the building and the small earthquake destructive force, the earthquake resistance of the bui...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/02C04B28/10C04B18/12
CPCY02W30/91
Inventor 罗立群王瑞亭金文波杨晓超黄红
Owner 平泉金盛科技发展有限公司
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