Manganese tailing slag-based baking-free brick as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of wave-absorbing materials, and particularly relates to a manganese tailing slag-based baking-free brick as well as a preparation method and application thereof. The baking-free brick comprises manganese slag, a calcium material, cement, fly ash and sand. According to the invention, due to the components of Fe2O3, SiO2 and the like with excellent wave-absorbing performance in the low-grade manganese tailing slag, and FeSiAl alloy powder, magnesium-manganese ferrite and the like generated by mixing and calcining the low-grade manganese slag and the calcium material, various loss mechanisms can be effectively utilized to attenuate electromagnetic waves, and an excellent wave-absorbing effect is obtained. The result shows that the low-grade manganese tailing slag is filled with the baking-free brick with the mass fraction of 60%, the minimum reflection loss is-22.06 dB under the frequency of 15.04 GHz, the effective absorption bandwidth reaches 4.16 GHz (13.84-18 GHz), and most Ku wave bands are covered.

Description

technical field [0001] The invention belongs to the technical field of wave absorbing materials, and particularly relates to a manganese tailings slag-based unburned brick and a preparation method and application thereof. Background technique [0002] With the development of modern science and technology, as the most convenient and fast way to transmit information, radio technology has been widely used in various fields such as national defense, communication, industrial and agricultural production, medicine, information industry, civil electronic appliances, transportation, etc. While bringing great convenience to people's daily life, it also gradually formed an environment full of artificial electromagnetic radiation. After noise pollution, solid waste pollution, air pollution, and water pollution, electromagnetic radiation pollution has become another new type of pollution source with a high level of hazard and is not easy to prevent and control. It not only affects norma...

AI Technical Summary

Problems solved by technology

However, the existing patented technology has the following main problems: 1) It is necessary to add a large amount of fillers such as steel fibers, carbon fibers, and graphite powder to form a conductive network to obtain better shielding performance, which brings higher production costs; 2) Conventional graphite powder, iron powder, etc. have large particle sizes, poor wettability, and are difficult to disperse in concrete, resulting in a significant decrease in the shielding performance and strength of concrete; 3) Shielding of carbonaceous materials, metals and polymers The mechanism is to use the constructed conductive network to reflect the incident electromagnetic wave back to the free space to achieve shielding, instead of completely absorbing the incident electromagnetic wave and dissipating it, so there is a problem of secondary electromagnetic radiation pollution

Although Chinese patent CN110776266A discloses a method for preparing electromagnetic wave-absorbing functional cement building materials using clay, manganese-containing materials, iron-containing materials, zinc-containing materials, copper-containing materials, cobalt-containing materials, etc., there are too many types of slag, There are large differences in the composition of slag in various regions and factories and mines, the proportion is difficult to meet the requirements, it is not conducive to large-scale production, and the electromagnetic wave absorption effect is poor, etc.

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