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Red mud treatment agent, Bayer red mud treatment method, concrete, building materials

A Bayer process red mud and treatment method technology, applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve problems such as uneven dispersion and difficulty in cutting materials, reduce environmental pollution problems, and widen the market. Prospects and the effect of improving comprehensive utilization

Active Publication Date: 2021-10-15
XUZHOU ZHONGLIAN CONCRETE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the embodiments of the present invention is to provide a treatment agent for red mud, a Bayer method red mud treatment method, concrete, and building materials, so as to solve the difficulty in feeding the existing Bayer red mud proposed in the background technology and the difficulty in stirring The problem of uneven dispersion in the process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A kind of Bayer process red mud processing method, comprises the following steps:

[0033] 1) Weigh 5kg of Bayer process red mud, 1kg of limestone powder, 1kg of papermaking black liquor and 1kg of water, and mix to obtain a mixture, wherein the solid content of the papermaking black liquor is 24%;

[0034] 2) Add 300 g of organosilicon defoamer to the mixture and mix to obtain the treated slurry of Bayer process red mud.

[0035] Wherein, the Bayer process red mud comes from Chinalco Shandong Co., Ltd., the water content of the Bayer process red mud is 20%, and the content of aluminum oxide is 20%. The papermaking black liquor comes from Shandong Tranlin Paper Co., Ltd., and has a solid content of 24%. The content of calcium oxide in the limestone powder is 60%, and the specific surface area is 500m 2 / kg. The organosilicon defoamer is a model YB-820 organosilicon defoamer from Shanghai Bilang Environmental Protection Technology Co., Ltd. The water content of the s...

Embodiment 2

[0037] A kind of Bayer process red mud processing method, comprises the following steps:

[0038] 1) Weigh 7kg of Bayer process red mud, 1kg of limestone powder, 1kg of papermaking black liquor and 3kg of water, and mix to obtain a mixture, wherein the solid content of the papermaking black liquor is 26%;

[0039] 2) Add 500 g of organosilicon defoamer to the mixture and mix to obtain the treated slurry of Bayer process red mud.

[0040] Wherein, the Bayer process red mud comes from Chinalco Shandong Co., Ltd., the water content of the Bayer process red mud is 30%, and the content of aluminum oxide is 30%. The papermaking black liquor comes from Shandong Tranlin Paper Industry Co., Ltd., and has a solid content of 26%. The content of calcium oxide in the limestone powder is not less than 50%, and the specific surface area is not less than 400m 2 / kg. The organosilicon defoamer is a model YB-820 organosilicon defoamer from Shanghai Bilang Environmental Protection Technology ...

Embodiment 3

[0042] A kind of Bayer process red mud processing method, comprises the following steps:

[0043] Weigh 6kg of Bayer process red mud, 1kg of limestone powder, 1kg of papermaking black liquor (solid content 25%), 2kg of water and 300g of organic silicon defoamer, stir evenly to form a stable suspension, and obtain Bayer process red mud after treatment Slurry; wherein, the Bayer process red mud comes from Chinalco Shandong Co., Ltd., its water content is 25%, and its mass content of aluminum oxide is 20%; the papermaking black liquor comes from Shandong Tranlin Paper Co., Ltd. , the solid content is 25%; the mass content of calcium oxide in the limestone powder is 50%, and the average specific surface area of ​​the limestone powder is 400m 2 / kg; The organosilicon defoamer is the model YB-820 organosilicon defoamer of Shanghai Bilang Environmental Protection Technology Co., Ltd.

[0044] Wherein, the water content of the slurry treated by the Bayer method red mud is 40%, and th...

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Abstract

The invention relates to the field of environmental protection, and specifically discloses a treatment agent for red mud, a Bayer red mud treatment method, concrete, and building materials. The treatment agent for red mud includes the following raw materials: limestone powder, papermaking black liquor and water, In the Bayer process red mud treatment method provided in the embodiment of the present invention, Bayer process red mud and papermaking black liquor are used as raw materials, and the dispersion effect of papermaking black liquor is used to disperse Bayer process red mud into a uniform slurry. During the slurry preparation process, by adding an appropriate amount of limestone powder to reduce the viscosity of the slurry, the Bayer process red mud is transported in liquid phase through the water pump to participate in the concrete ingredients, which solves the difficulty in cutting the existing Bayer process red mud And the problem of uneven dispersion in the stirring process has broad market prospects.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a red mud treatment agent, a Bayer process red mud treatment method, concrete and building materials. Background technique [0002] Among the three alumina production processes of sintering method, Bayer method and combined method, Bayer method currently occupies a dominant position, and about 95% of alumina is produced by Bayer method. Among them, Bayer method red mud is discharged during the production of alumina by Bayer method If the polluting waste residue is not properly treated, it will easily cause environmental pollution. In the papermaking industry, the wastewater generated during the application of alkaline pulping contains a large amount of lignin, which is called papermaking black liquor because of its dark brown color. Papermaking black liquor contains a large amount of suspended solids, organic pollutants and toxic substances, which will cause serious pollu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B22/00C04B20/02C04B18/04
CPCC04B18/0409C04B20/023C04B40/0039C04B14/28C04B22/0046Y02W30/91
Inventor 拾莉李路陈庭朱丽丽祖庆贺臧军
Owner XUZHOU ZHONGLIAN CONCRETE CO LTD