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Ceramic-based water-permeable brick using total tailings as raw material and preparation method

A permeable brick and ceramic-based technology, applied in the field of inorganic non-metallic materials, can solve the problems of lack of large quantities of tailings, high value-added utilization technology, insufficient innovation ability of key technologies and equipment, and low level of comprehensive utilization technology of tailings resources. , to achieve high strength, improve utilization, and protect the environment

Pending Publication Date: 2018-11-23
河北睿索固废工程技术研究院有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Our province has a large amount of tailings reservoirs and a large amount of tailings stockpile, but the comprehensive utilization technology level of tailings resources is relatively low, major key technologies and equipment innovation capabilities are insufficient, and there is a lack of large-scale and high value-added utilization technologies for tailings; a large number of tailings The existence of mines not only occupies a large amount of land resources, causing a great waste of resources, but also causes a certain degree of pollution to water and land resources. Therefore, tailings and other bulk solid wastes have great potential for development and utilization, and are rare and precious resources. Make full use of it and benefit the society

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Dry the tailings sand, remove impurities and sieve to obtain aggregates of 5 to 50 meshes with 4 different particle sizes. They are A1 (5~10 mesh), A2 (10~16 mesh), A3 (16~30 mesh), A4 (30~50 mesh).

[0021] The particle size composition of the aggregate is: 30% for 5-10 mesh, 30% for 10-16 mesh, 10wt% for 16-30 mesh, and 10wt% aggregate for 30-50 mesh;

[0022] The gold tailings are crushed, sieved and passed through a 200-mesh sieve to take the sieved material for later use. Crushing and finely grinding 5-20wt% of gold tailings and other solid waste through a 200-mesh sieve to obtain a matrix;

[0023] The other solid wastes mentioned include one or more of construction waste, fly ash, coal gangue mines, and river sludge

[0024] 80wt% of tailings aggregate, 15wt% of matrix, 3wt% of sintering aid and 2wt% of additives were mixed according to the weight ratio and aged for 24hh.

[0025] After the stale mixture is shaped by a vibrating brick machine with a standard p...

Embodiment 2

[0029] After drying the tailings sand, removing impurities and screening, four kinds of aggregates with different particle sizes of 5-50 meshes were obtained, namely A1 (5-10 meshes), A2 (10-16 meshes), A3 (16-30 meshes), A3 (16-30 meshes), A4 (30-50 mesh).

[0030] The particle size composition of the aggregate is: A1 (5-10 mesh) 30wt%, A2 (10-16 mesh) 40wt%, A3 (16-30 mesh) 10wt%, A4 (30-50 mesh) 5wt% . the aggregate;

[0031] The gold tailings are crushed, sieved and passed through a 200-mesh sieve to take the sieved material for later use. Crushing and grinding 5-25wt% of gold tailings and 0-5wt% of other solid wastes, passing through a 200-mesh sieve, and taking the sieve material to obtain the matrix;

[0032] The other solid wastes mentioned include one or more of construction waste, fly ash, coal gangue mines, and river sludge

[0033] 85wt% tailings aggregate, 10wt% matrix, 3wt% sintering aid and 2wt% additive were mixed according to the weight ratio and aged for ...

Embodiment 3

[0038] After drying the tailings sand, removing impurities and screening, four kinds of aggregates with different particle sizes of 5-50 mesh are obtained, namely A1, A2, A3 and A4.

[0039] The particle size composition of the aggregate is as follows: A1 is 5-10 mesh, accounting for 40wt%, A2 is 10-16 mesh, accounting for 20wt%, A3 is 16-30 mesh, accounting for 10wt%, A4 is 30-50 mesh Aggregate accounting for 5wt%;

[0040] The gold tailings are crushed, sieved and passed through a 200-mesh sieve to take the sieved material for later use. Crushing and grinding 5-30wt% of gold tailings and 0-5wt% of other solid wastes, passing through a 200-mesh sieve, and taking the sieve material to obtain the matrix;

[0041] The other solid wastes mentioned include one or more of construction waste, fly ash, coal gangue mines, and river sludge

[0042] Mix 75wt% tailings aggregate, 20wt% matrix, 3wt% sintering aid and 2wt% additive according to the weight ratio, and then stale for 24h-72...

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Abstract

The invention relates to a ceramic-based water-permeable brick using total tailings as raw material and a preparation method, and belongs to the technical field of inorganic non-metallic materials. Asintered water-permeable brick is prepared from the following chemical components in percentage by weight: 64 to 72% of SiO2 (silicon dioxide), 8 to 12% of Al2O3 (aluminum oxide), 8 to 10% of Fe2O3 (iron oxide), 3 to 7% of CaO (calcium oxide), 1.5 to 3.5% of MgO (magnesium oxide), and 3 to 5% of K2O (potassium oxide) and Na2O (sodium oxide). The main crystal phase of the prepared sintered water-permeable brick is quartz; the secondary phases are feldspar, diopside and mica minerals; the sintered water-permeable brick also contains a small amount of serpentine, amphibole and tremolite minerals.The sintered water-permeable brick has the advantages that the properties of the sintered water-permeable brick prepared by the whole raw material sintering method are better than the properties of the cement-based water-permeable brick, so that the range of the raw materials of the sintered water-permeable brick is expanded, and a novel path is opened for the high-value utilization of the tailings; while the tailings are recycled at high efficiency, the sintered water-permeable brick with high strength, durability and anti-freezing and thawing property is obtained; the positive function is realized on the reutilization of resources and the protection of ecological environment.

Description

technical field [0001] The invention belongs to the technical field of inorganic non-metallic materials, and in particular relates to a ceramic-based permeable brick using whole tailings as a raw material and a preparation method thereof. Background technique [0002] With the development of urbanization, my country's cities are faced with prominent problems such as high flood pressure, frequent waterlogging disasters, and serious loss of rainwater resources; urban groundwater levels are declining, urban waterlogging, urban heat islands are serious, and urban natural ecology is facing serious imbalances. For this reason, our country puts forward the concept of "sponge city" with the purpose of improving the hydrological and ecological environment of urban roads and improving the breathing function of the urban environment. Sintered permeable brick has the characteristics of high strength and good water permeability, which can effectively solve the problem of water permeabili...

Claims

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Application Information

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IPC IPC(8): C04B35/14C04B35/622
CPCC04B35/14C04B35/62204C04B2235/3201C04B2235/3206C04B2235/3208C04B2235/3217C04B2235/3272
Inventor 温晓庆王林俊陈旭峰毕昇吴永明张大伟
Owner 河北睿索固废工程技术研究院有限公司
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