Method of using red mud to prepare firing-free lightweight aggregate

A lightweight aggregate and red mud technology, applied in the field of solid waste resource utilization, can solve problems such as land occupation, threats to surrounding people's property and life safety, pollution of groundwater sources and atmospheric environment, etc., to achieve low cost and improve resource utilization. The effect of the degree and preparation method is simple and easy to implement

Inactive Publication Date: 2017-09-05
HENAN POLYTECHNIC UNIV
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Problems solved by technology

[0002] Red mud is industrial waste discharged from alumina plants. A large amount of these solid wastes occupy a large amount of land, pollute groundwater sources and the atmospheric environment, and pose a serious threat to the property and life safety of surrounding people.

Method used

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Embodiment Construction

[0007] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0008] This specific embodiment adopts the following technical scheme: a method for preparing non-burning lightweight aggregate using red mud, the steps of which are: adding water to red mud, cement, and fine sand in a ratio of 5:2:3 and stirring evenly, and the water-solid ratio 0.22:1, then use a ball press machine to make 5-10mm balls, and leave the factory after three days of indoor curing.

[0009] The red mud described in this embodiment is industrial waste produced by an alumina plant, which has high sodium oxide content and high alkalinity; the cement is C425 ordinary Portland cement; the fine sand is river sand with less mud content.

[0010] This specific implementation method is simple and easy to implement, improves the resource utiliz...

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Abstract

The invention discloses a method of using red mud to prepare firing-free lightweight aggregate and relates to the technical field of solid waste recycling. The method includes steps: adding water to well stir the red mud, cement and fine sand according to a proportion of 5:2:3 and a water-solid ratio of 0.22:1; using a ball pressing machine to make balls of 5-10mm, and curing indoors for three days to go out a factory. The method is simple and easy to implement, low in cost, energy-saving, environment-friendly and easy to popularize and use, and recycling degree of industrial waste is increased.

Description

technical field [0001] The invention relates to the technical field of resource utilization of solid waste, in particular to a method for preparing burn-free lightweight aggregate using red mud. Background technique [0002] Red mud is industrial waste discharged from alumina plants. A large amount of these solid wastes occupy a large amount of land, pollute groundwater sources and the atmospheric environment, and pose a serious threat to the property and life safety of surrounding people. According to the analysis, the CaO content of red mud (sintering method) is as high as 40%, and it contains a large amount of cement active ingredients - calcium silicate and other hydraulic materials, which can replace lime and cement for building materials. The large-scale comprehensive utilization of red mud resources is in line with the national industrial policy. It can not only save a lot of precious land resources and protect the ecological environment, but also generate huge econom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B18/02C04B111/40
CPCC04B28/04C04B18/027C04B2111/00017C04B2111/40C04B18/0409C04B14/06
Inventor 符勇
Owner HENAN POLYTECHNIC UNIV
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