Process for rare-earth smelting resource reclamation and cyclic production

Abstract

The invention relates to a process for rare-earth smelting resource reclamation and cyclic production. The process has the main characteristic of comprehensively and systematically solving the problems of environmental protection and industrial promotion of the whole rare-earth industrial chain by adopting innovative integrated technical means. The process mainly comprises administration and comprehensive utilization of waste gas, waste water and waste slag, revolution of a rare-earth smelting process, and reclamation and repeated utilization of various important resources such as sulfur, fluorine, ammonium, thorium, phosphorus, calcium and the like so as to achieve smokeless and harmless treatment of the waste gas, full utilization of the resources and zero discharge of industrial waste water and fulfill the final goal of cyclic production. The process radically solves the maximum environment-friendly bottleneck problem in a sustainable development process of the Baotou rare-earth industry from resource advantage to industrial advantage, in particular the historical key environment-friendly technical problem, reduces energy consumption of a large amount of resources and pollutiondischarge, greatly reduces the production cost, upgrades the rare-earth industry, and extends the larger industrial chain at the same time.

Description

technical field [0001] The present invention relates to a rare earth smelting resource recycling and recycling production process, in particular to a rare earth clean production process combining environmental protection technology and rare earth smelting technology for resource comprehensive utilization and circular production, belonging to rare earth smelting and industrial environment protect the technical field. Background technique [0002] There are generally two types of rare earth production methods using Baotou rare earth concentrates: acid method and alkali method. Considering the source of raw materials, economic characteristics, and degree of large-scale industrialization, most of them use the acid method, which has experienced high temperature and medium temperature. At present, the technology exploration and practice in the stage of high temperature, low temperature and other stages are mainly three-generation acid-process high-temperature roasting production p...

AI Technical Summary

Problems solved by technology

[0089] To sum up, there has been no real breakthrough from the perspective of pollution control in the process system of rare earth smelting and extraction, including no major breakthrough in the research of mechanism. The problem of resource utilization and circular production has been considered comprehensively, so that the problem of serious pollution and waste of resources has not been resolved; the main manifestation is that the rare earths are derived from oxides in minerals, and the products that go out are still oxides. All raw materials and intermediate substances are only It is used as an intermediate medium, but it is transformed into a large amount of pollutants, that is, rare earth products at the expense of a large amount of resources and the environment. The subsequent waste of environmental protection resources and energy consumption will never be fundamentally solved, and development will inevitably be affected. limit

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