Ceramic brick produced by using rare earth tailings and production method thereof

Abstract

The invention discloses a ceramic brick prepared by rare earth tailings, wherein a base substrate of the ceramic brick comprises 55-80 wt% of the rare earth tailings, 5-15 wt% of plastic clay, and 10-30 wt% of fusing agent. The invention also discloses a production method of the ceramic brick. According to the invention, the utilization rate of the rare earth tailings is greatly raised, simultaneously the sintering temperature of a product is reduced, the range of the sintering temperature is enlarged, and guarantees for guaranteeing all performance indexes and quality of the product are provided; and the recycling of the rare earth tailings is effectively realized, and the production cost is reduced. The invention is beneficial for protecting environment and promoting the sustainable development of industry production, and has important economic benefits and social benefits.

Description

technical field [0001] The invention relates to the technical field of ceramics, in particular to a ceramic brick prepared from rare earth tailings. Background technique [0002] my country is rich in rare earth resources, and its reserves and product exports both rank first in the world. The vigorous development and production of rare earth mineral resources makes a large amount of rare earth tailings produced every year. Weathering crust elution-type rare earth ores are unique rare earth minerals in my country. They are widely distributed in Jiangxi, Fujian, Guangdong, Yunnan, Hunan, Guangxi, Zhejiang and other provinces in southern China. They are rich in reserves and are valuable mineral resources in my country. However, because its rare earth tailings are typical symbiotic and associated refractory tailings, it has brought difficulties to my country's vigorous development of circular economy and protection of the ecological environment. From the perspective of the sci...

AI Technical Summary

Problems solved by technology

[0005] (1) The extensive use of rare earth tailings in the prior art will lead to an increase in the firing temperature of ceramic products. At present, the firing temperature of ceramic tile products is generally between 1150 and 1220°C, which not only consumes high energy, but also has a high firing temperature. High and narrow range, it is easy to cause problems such as low product strength, raw burning and deformation of the product, which limits the amount of rare earth tailings

For example, the building bricks developed in the prior art to increase the utilization of rare earth tailings can reach 50%, but the product needs to be sintered above 1150°C, and the water absorption rate is greater than 1%, and the strength is only 32.18Mpa, which does not meet the requirements of porcelain. National Standard for Quality Bricks

[0006] (2) Extensive use of rare earth tailings in architectural ceramic formulations will increase the proportion of barren materials in the formulation, resulting in a decrease in green body strength and prone to damage during production, thereby reducing the pass rate of products and increasing cost of production

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