Method for synergistically preparing baking-free steaming-free cured bricks from squeezed fine silt and lithium slag obtained after lepidolite beneficiation based on carbon curing

Abstract

The invention discloses a method for synergistically preparing a baking-free steaming-free cured brick from squeezed fine silt and lithium slag obtained after lepidolite beneficiation based on carbon curing, belonging to the technical field of solid waste treatment and resource utilization. The baking-free steaming-free cured brick comprises the following components by weight: 50-90 parts of the lithium slag, 0-50 parts of the squeezed fine silt, 10-25 parts of a curing agent, and 10-14 parts of water. According to the preparation method, the lithium slag and the squeezed fine silt which are byproducts in production of lithium carbonate from lepidolite are used as main raw materials; dissolution of alkali and sulfur in the lithium slag can be accelerated through raw material grain composition optimization and curing agent excitation, so excitation effect is further promoted; and the high-strength baking-free steaming-free cured brick with a volume weight of 2730 kg/m<3> can be obtained through compression molding and carbon curing. The method is wide in application range and mature in preparation technology; the formed brick does not need to be maintained, so the production efficiency of brick making is improved, the problem that the surface of the cured brick is prone to saltpetering is solved, and production cost is reduced; and resource utilization of the lepidolite byproduct slag is achieved, the problems of solid waste pollution and land occupation are reduced, and the environment-friendly and application requirements of the market for building materials are met.

Description

technical field [0001] The invention belongs to the technical field of solid waste treatment and resource utilization, and specifically relates to a method for synergistically preparing lepidolite beneficiation and pressing fine mud and lithium slag without burning and steaming to solidify bricks based on carbon conservation. Background technique [0002] The pressed fine mud and lithium slag produced by lepidolite production of lithium carbonate have the characteristics of large quantity, large area, large pollution, high alkalinity, many sulfate radicals, and high difficulty in development. The ecological environment restricts local economic development, so it is of great significance to develop the recycling of lepidolite by-product slag. [0003] With the in-depth promotion of the urbanization process and the further development of ecological civilization construction, the market has put forward higher requirements for the development of building materials. The tradition...

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Problems solved by technology

[0002] The pressed fine mud and lithium slag produced by lepidolite production of lithium carbonate have the characteristics of large quantity, large area, large pollution, high alkalinity, many sulfate radicals, and high difficulty in development. The ecological environment restricts local economic development, so it is of great significance to develop the recycling of lepidolite by-product slag

[0003] With the in-depth promotion of the urbanization process and the further development of ecological civilization construction, the market has put forward higher requirements for the development of building materials. The traditional clay building bricks no longer meet the market requirements due to energy consumption and environmental problems. Therefore, related Scholars have proposed to use construction waste or tailings to prepare building bricks by pressing and forming, but due to the problems of insufficient mechanical strength and easy efflorescence on the surface, it cannot be further popularized and applied.

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