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A kind of porous permeable brick fired by using carbonate-containing iron tailings and its firing method

A technology of carbonate and permeable bricks, which is applied in the field of building materials, and can solve problems such as the inability to guarantee the compressive performance of bricks, the decrease in profits of the concentrator, and the large number of raw materials.

Active Publication Date: 2022-04-15
ANSTEEL GRP MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, plant particles (such as straw) are mostly used to fire porous permeable bricks, but the compressive properties of the fired bricks cannot be guaranteed.
[0003] At the same time, after the iron ore containing carbonate is sorted by the concentrator, due to the limitation of the existing beneficiation technology, the tailings still contain some iron minerals that are difficult to recover, resulting in the loss of iron minerals and the reduction of the profit of the concentrator. cause waste
[0004] In the prior art, the patents using iron tailings as raw materials for permeable bricks all use iron tailings instead of ordinary sand as raw materials, and the permeable bricks in these patents have complex components, and too many raw materials need to be purchased during production

Method used

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  • A kind of porous permeable brick fired by using carbonate-containing iron tailings and its firing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1) Get 80 kilograms of tailings containing iron carbonate, 10 kilograms of clay, 10 kilograms of fly ash, mix and stir with 12 kilograms of water;

[0022] 2) Pour the mixed raw material obtained in step 1) into a mould, pressurize at 5 MPa and press to form the adobe;

[0023] 3) drying and solidifying the adobe so that the moisture content of the adobe body is 1.8%, firing at a temperature of 1400° C. for 23 hours, and then cooling naturally to obtain a porous permeable brick with a thickness of 4 cm.

[0024] After testing, the water permeability coefficient of the fired permeable brick is 5.4×10 -2 cm / s, compressive strength 51.3MPa, flexural strength 8.3MPa.

Embodiment 2

[0026] The method for firing porous permeable bricks by utilizing carbonate-containing hematite tailings comprises the following steps:

[0027] 1) Get 90 kilograms of carbonate-containing hematite tailings, 5 kilograms of clay, and 5 kilograms of fly ash, mix and stir with 8 kilograms of water;

[0028] 2) Pour the mixed raw material obtained in step 1) into a mould, pressurize at 7MPa and press to form the adobe;

[0029] 3) Dry and solidify the adobe so that the moisture content of the adobe body is 1.5%, fire at a temperature of 1200° C. for 27 hours, and then cool naturally to obtain a porous permeable brick with a thickness of 6 cm.

[0030] After testing, the water permeability of the fired permeable brick is 7.5×10 -2 cm / s, compressive strength 58.1MPa, flexural strength 8.7MPa.

Embodiment 3

[0032] The method for firing porous permeable bricks by utilizing carbonate-containing hematite tailings comprises the following steps:

[0033] 1) get 85 kilograms of hematite tailings containing carbonate, 7.5 kilograms of clay, 7.5 kilograms of fly ash, mix and stir with 10 kilograms of water;

[0034] 2) Pour the mixed raw material obtained in step 1) into a mould, press 10MPa to press and form it, and obtain the adobe;

[0035] 3) Dry and solidify the adobe so that the moisture content of the adobe body is 1.9%, fire at a temperature of 1300° C. for 25 hours, and then cool naturally to obtain a porous permeable brick with a thickness of 8 cm.

[0036] After testing, the water permeability of the fired permeable brick is 6.2×10 -2 cm / s, compressive strength 55.6MPa, flexural strength 8.6MPa.

[0037] In summary, the indicators of the permeable bricks made of carbonate-containing hematite tailings are higher than those of the permeable bricks made of plant particles. It ...

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Abstract

The invention provides a porous permeable brick fired by using carbonate-containing iron tailings and a firing method thereof, belonging to the technical field of building materials. The porous permeable brick of the present invention is composed of the following raw material components: 80% to 90% of carbonate-containing hematite tailings, 5% to 10% of clay, 5% to 10% of fly ash, and the total mass It is 100%; it is obtained by adding 8-12% water of the total mass of the above three raw materials and firing at high temperature. The present invention uses carbonate-containing iron tailings as the main raw material for firing bricks. While maintaining the water permeability of the bricks, it not only increases the load-bearing performance of the bricks, but also saves the iron tailings containing carbonates of mines. The efficient use of has opened up the way.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a porous permeable brick fired by using carbonate-containing iron tailings and a firing method thereof. Background technique [0002] At present, plant particles (such as straw) are mostly used to fire porous permeable bricks, but the compressive properties of the fired bricks cannot be guaranteed. [0003] At the same time, after the iron ore containing carbonate is sorted by the concentrator, due to the limitation of the existing beneficiation technology, the tailings still contain some iron minerals that are difficult to recover, resulting in the loss of iron minerals and the reduction of the profit of the concentrator. cause waste. [0004] The patents in the prior art that use iron tailings as raw materials for permeable bricks all use iron tailings instead of ordinary sand as raw materials, and the permeable bricks in these patents have complex compo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B33/132C04B33/135C04B38/02
CPCC04B33/1324C04B33/1352C04B38/02C04B2235/95C04B2235/405C04B2235/96C04B2235/442Y02P40/60
Inventor 孟娜孙景新修德江胡健刘志龙孟磊磊戴兴宇
Owner ANSTEEL GRP MINING CO LTD