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Buring free, steaming free bearing building blocks or bricks prepared from tailing sand of iron ore, and manufacturing process

A technology of iron ore tailings sand and blocks, which is applied in the field of building bricks, can solve the problems of surface vegetation destruction, low utilization rate of mine resources, mine environmental pollution, etc., and achieve the effect of protecting the ecological environment and preventing tailings pollution

Inactive Publication Date: 2006-02-01
ANYANG IRON & STEEL GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the mining process of our country, the treatment and application of mine tailings has always been a difficult problem in the mining process. At present, the extensive treatment method of mine tailings filling ditch and stacking is generally adopted. On the one hand, this method causes a large number of open-air stacking of tailings The destruction of surface vegetation causes pollution of the mine environment, leading to soil erosion and desertification. On the other hand, tailings resources are not utilized, and the utilization rate of the entire mine resource is low, resulting in a waste of national mine resources.
At the same time, in the field of building brick technology, in order to protect clay resources, the country has explicitly banned the use of clay bricks, and developed the research direction of ecological building bricks as clay brick substitute products. The raw materials of bricks are mainly fly ash from power plants and blast furnace slag from iron and steel plants. There are no literature reports on building blocks, bricks and their manufacturing processes with iron ore tailings as the main raw materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The building blocks or bricks for non-burning and non-steaming load-bearing buildings of the present invention are composed of iron ore tailings, gravel, fly ash, Portland cement and concrete water-reducing agent, and its weight ratio (%) is: the particle size is 0.3mm iron ore tailings: 20%, gravel with a particle size of 10mm: 50%, Class I fly ash 19.75%, Portland cement 10%, concrete water reducer: 0.25%; according to the above weight ratio Weigh the raw materials, add water with 50% of the total weight of the raw materials, put them into the block and brick forming machine after stirring, extrude and vibrate to form, stack the demoulded blocks and bricks, cover them with straw thatch until 12 o'clock, and uncover After the grass thatch is watered, cover the grass thatch again, water every 6 hours for 5 days, then remove the grass thatch and maintain it naturally for 22 days.

Embodiment 2

[0016] The building blocks or bricks for non-burning and non-steaming load-bearing buildings of the present invention are composed of iron ore tailings, gravel, fly ash and Portland cement, and the weight ratio (%) is: iron ore with a particle diameter of 1.0mm Tailings sand: 30%, gravel with a particle size of 14mm: 40%, Class I fly ash 14.5%, Portland cement 15%, concrete water reducing agent: 0.5%; weigh raw materials according to the above weight ratio, add Water with 50% of the total weight of raw materials, after stirring, enter the block and brick forming machine, extrude and vibrate to form, stack the demoulded blocks and bricks, cover them with grass thatch for 24 hours, uncover the grass thatch and water Then cover the grass thatch again, water every 8 hours for 7 days, then remove the grass thatch and maintain it naturally for 28 days.

Embodiment 3

[0018] The building blocks or bricks for non-burning and non-steaming load-bearing buildings of the present invention are composed of iron ore tailings, crushed stones, fly ash and Portland cement, and the weight ratio (%) is: iron ore with a particle diameter of 1.5mm Tailings sand: 35%, crushed stone with a particle size of 18mm: 44%, Class II fly ash 10%, Portland cement 10%, concrete water reducer: 1%; take raw materials according to the above weight ratio, add Water with 50% of the total weight of raw materials, after stirring, enter the block and brick forming machine, extrude and vibrate to form, stack the demoulded blocks and bricks, cover them with grass thatch for 36 hours, uncover the grass thatch and water Cover the grass thatch again, water every 10 hours for 9 days, then remove the grass thatch and maintain it naturally for 28 days.

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Abstract

A load-bearing building block or brick is prepared from iron ore tailings (20-40 Wt%), broken stone (40-60), powdered coal ash (10-30), Portland cement (9.9-20) and water-reducing agent (0.1-1). Its making technology without calcining and steaming is also disclosed.

Description

technical field [0001] The invention relates to a non-burning and non-steaming load-bearing block or brick and its manufacturing process, in particular to a non-burning and non-steaming load-bearing block or brick made of iron ore tailings and its manufacturing process, which belongs to the construction brick technology field. Background technique [0002] In the mining process of our country, the treatment and application of mine tailings has always been a difficult problem in the mining process. At present, the extensive treatment method of mine tailings filling ditch and stacking is generally adopted. On the one hand, this method causes a large number of open-air stacking of tailings The destruction of surface vegetation causes pollution of the mine environment, leading to soil erosion and desertification. On the other hand, tailings resources are not utilized, and the utilization rate of the entire mine resource is low, resulting in a waste of national mine resources. A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B18/14C04B18/08C04B14/04C04B33/02
CPCY02W30/91
Inventor 刘保平张清学韩绿林马茂君于占淇王志新赵振峰
Owner ANYANG IRON & STEEL GRP
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