Method for concentrating mineral solid waste low-concentration occurrence rare and precious elements and co-producing high-grade aluminum-silicon raw materials

Abstract

The invention discloses a method for concentrating mineral solid waste low-concentration occurrence rare and precious elements and co-producing high-grade aluminum-silicon raw materials. The invention relates to a method for concentrating low-concentration occurrence rare and precious elements in mineral solid waste and co-producing high-grade aluminum-silicon raw materials. The method comprises the following steps: deconstruction and activation of silicon and aluminum, hydrolysis matching of acid and alkaline salt, leaching of the rare and precious elements, co-production of the high-grade aluminum-silicon raw materials, carbon dioxide fixation and concentration of the rare and precious elements. According to the method, technical routes such as silicon-aluminum deconstruction, acid-alkali salt hydrolysis matching, precise rare and precious element release, high-grade aluminum-silicon raw material co-production and carbon dioxide cyclic fixation of the mining and metallurgy solid waste are specifically constructed, an acid leaching process is avoided, and the energy efficiency and economical efficiency of the process are improved; the method can promote the output of high-value and high-grade secondary mineral products of mining and metallurgy solid wastes, improve the resource utilization rate and the low-carbon ecological efficiency, provide a solution for environmental pollution and ecological damage of stockpiling solid wastes and tailings, and improve the technical research and development, integration, transformation and radiation transfer capabilities.

Description

technical field [0001] The invention relates to the technical field of environmental protection and ecology, in particular to a method for enriching rare and precious elements in low-concentration mineral solid waste and co-producing high-grade aluminum-silicon raw materials. Background technique [0002] The prominent problems in the mineral and metallurgical industry are high energy consumption, high carbon emissions, and high solid waste output. Among them, the output solid waste has many types, complex components, occupies a large amount of land, causes visual and environmental pollution, and is often simply used as a building and road construction auxiliary material with a large absorption capacity, with low economic value and utilization rate. The symbiosis and associated nature of minerals is the main reason for the complex composition of solid waste, among which there are many scattered rare and precious elements or key elements of technology that are of great signif...

AI Technical Summary

Problems solved by technology

Usually, rare and precious elements associated with mineral solid waste are deeply embedded in the common crystal phase structure of solid waste such as silicon and aluminum, which interferes with its extraction and poses a challenge to the economics of the extraction process of rare and precious elements that already exist in low concentrations. Promote the transfer and release of heavy metals that are harmful to health and the environment in solid waste, and the high-value utilization of a large proportion of silicon and aluminum is also a long-term problem