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A preparation method for autoclaved aerated concrete blocks produced from antimony ore tailings

A concrete block and autoclaved aeration technology, which is applied in ceramic products, climate sustainability, sustainable waste treatment, etc. , Improve the strength of masonry, prolong the effect of digestion time

Inactive Publication Date: 2017-01-25
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this scheme, the antimony tailings slag is the tailings produced by ore dressing, but the antimony smelting slag, which pollutes the surrounding environment more seriously, is not involved, and the advantages of material performance are not obvious. At the same time, lime and cement account for a large proportion of raw materials, so the product cost higher

Method used

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  • A preparation method for autoclaved aerated concrete blocks produced from antimony ore tailings
  • A preparation method for autoclaved aerated concrete blocks produced from antimony ore tailings
  • A preparation method for autoclaved aerated concrete blocks produced from antimony ore tailings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Take the tailings of a certain antimony ore and form and maintain it into a billet and cut the leftovers into a dryer with a temperature of 130°C to 150°C to dry, and send the dried mixture to a ball mill to grind it finely, and finally pass it through a 0.150mm After being sieved by the sieving machine, it is ready for use.

[0032] (2) According to the preparation process of the autoclaved aerated concrete block of the present invention, respectively weigh antimony ore tailings, fly ash, quicklime powder, gypsum, 425# ordinary Portland cement, Water and foamed aluminum powder (manually adjusted to 15% foamed aluminum powder suspension) for use; then put antimony ore tailings-fly ash-quicklime powder-gypsum-cement into the machine model NJ-160A Stir in a mixer at 300r / min for 2.5min, then add a certain mass of water to the mixer and stir at 500r / min for 1.5min, and finally add foamed aluminum powder suspension and stir at 800r / min for 2min; the mass percentages of ...

Embodiment 2

[0036] (1) Take the tailings of a certain antimony ore and form and maintain it into a billet and cut the leftovers into a dryer with a temperature of 130°C to 150°C to dry, and send the dried mixture to a ball mill to grind it finely, and finally pass it through a 0.150mm After being sieved by the sieving machine, it is ready for use.

[0037] (2) According to the preparation process of the autoclaved aerated concrete block of the present invention, respectively weigh antimony ore tailings, fly ash, quicklime powder, gypsum, 425# ordinary Portland cement, water and foaming Aluminum powder (artificially modulated into 15% foamed aluminum powder suspension) is for use; then the order of antimony ore tailings-fly ash-quicklime powder-gypsum-cement is dropped into the mechanical mixer of NJ-160A and mixed with Stir at 300r / min for 2min, then add a fixed mass of water at about 25°C in the mixer and stir at 500r / min for 1.5min, and finally add foam aluminum powder suspension and st...

Embodiment 3

[0041] (1) Take the tailings of a certain antimony ore and form and maintain it into a billet and cut the leftovers into a dryer with a temperature of 130°C to 150°C to dry, and send the dried mixture to a ball mill to grind it finely, and finally pass it through a 0.150mm After being sieved by the sieving machine, it is ready for use.

[0042] (2) According to the preparation process of the autoclaved aerated concrete block of the present invention, respectively weigh antimony ore tailings, fly ash, quicklime powder, gypsum, 425# ordinary Portland cement, Water and foamed aluminum powder suspension (manually adjusted to 15% foamed aluminum powder suspension) for use; then put antimony ore tailings-fly ash-quicklime powder-gypsum-cement in the order of NJ-160A Stir in a mechanical mixer at 300r / min for 2min, then add a certain mass of water to the mixer and stir at 500r / min for 1.5min, and finally add foamed aluminum powder suspension and stir at 800r / min for 1min; the mass pe...

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Abstract

The invention discloses a preparation method for producing an autoclaved aerated concrete block by using antimony ore tailings. The preparation method comprises the following steps: (1) drying and grinding the antimony ore tailings, and then screening to obtain standby antimony ore tailings with particle diameters less than or equal to 0.150 mm; (2) mixing and stirring the antimony ore tailings obtained from the step (1) with quicklime powder, fly ash, cement, gypsum and water, wherein raw materials are as follows in percentage by weight: 65%-75% of the antimony ore tailings, 13%-23% of the fly ash, 5% of the quicklime powder, 2% of the gypsum and 5% of the cement, and the water-material ratio is 0.60-0.68; then adding a foaming aluminum powder suspension, wherein the weight of aluminum powder contained in the foaming aluminum powder suspension accounts for 0.10%-0.15% of the dry weight of the raw materials; (3) foaming a mixed slurry obtained from the step (2) into a blank, and curing; (4) carrying out autoclaved curing on the blank obtained from the step (3) to obtain the autoclaved aerated concrete block. The preparation method disclosed by the invention can be used for saving the energy resources and the resources by substituting the antimony ore tailings for sand, achieves the harmless and recycling utilization of the antimony ore tailings, accords with the national circular economy industrial policy and achieves outstanding economic benefits, social benefits and environmental benefits.

Description

technical field [0001] The invention belongs to the field of civil engineering materials, in particular to a preparation method for producing autoclaved aerated concrete blocks from antimony ore tailings. Background technique [0002] As an important national strategic substance, antimony is mainly used in the production of ceramics, glass, batteries, paints, arms, semiconductors, pesticides and flame retardants. The world's antimony reserves are about 4.5 to 6 million tons, and China's reserves are 3.0 to 3.5 million tons. The major countries in the world use a large amount of antimony, about 120,000 to 150,000 tons per year. As the world's largest antimony producer, China produced antimony in 2013 Antimony products reached 311,600 tons. At present, a large amount of antimony ore tailings are produced in the process of mining, beneficiation and smelting of antimony ore in the whole country (especially in Hunan, Guizhou and Guangxi). At present, the main method of processi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B38/02C04B18/30C04B22/04
CPCY02W30/91
Inventor 曾德芳周赛军
Owner WUHAN UNIV OF TECH
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