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System and method for industrially recycling zinc to produce nanometer zinc oxide

A nano-zinc oxide and sub-zinc oxide technology, applied in the field of chemical metallurgy, can solve the problems of inability to recycle valuable elements, low grade of sub-zinc oxide, incomplete zinc recovery, etc., and achieve high recycling rate, reasonable disposal, and improved Effect of Crystallization Efficiency

Pending Publication Date: 2020-02-11
CHONGQING CISDI THERMAL & ENVIRONMENTAL ENG CO LTD
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0006] In view of this, the purpose of the present invention is to provide a system and method for industrialized recovery of zinc to produce nano-zinc oxide, which is used to solve the incomplete recovery of zinc in the existing ammonia leaching process, and the inability of valuable elements such as iron in the residue Recycling, the salt in the material causes the system to run poorly, the sub-zinc oxide produced by the rotary hearth furnace is of low grade, and the economic benefits are poor, etc.

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  • System and method for industrially recycling zinc to produce nanometer zinc oxide
  • System and method for industrially recycling zinc to produce nanometer zinc oxide

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Embodiment Construction

[0031] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematically illustrating the basic idea of ​​the present invention, and the following embodiments and the features in the embodiments can be combined with each other under the condition of no conflict.

[0032]The scope of application of the disclosed system is not particularly limited, and can be widely applied to the utilization of various zinc-containing materials. The...

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Abstract

The invention discloses a system and method for industrially recycling zinc to produce nanometer zinc oxide, and belongs to the technical field of chemical metallurgy. According to the production sequence of zinc recycling, the system comprises a rotary hearth furnace, a desalination device, an ammonia process digestion reactor, a purification reactor, a crystallization reactor, a calcification reactor, a rinsing tank, a drying device and a calcination device. The method comprises the steps that a second-class of zinc-containing material is fed into the rotary hearth furnace for the first timeof zinc recycling refining to produce secondary zinc oxide; ammonia process digestion is carried out on the secondary zinc oxide produced with the rotary hearth furnace and a first-class of zinc-containing material for the second time of zinc recycling refining so as to produce zinc and ammonia complex liquid; then the zinc and ammonia complex liquid is subjected to purification and carbonizationcrystallization to produce zinc oxide precursors; and the zinc oxide precursors are subjected to rinsing, drying and calcination to form a nanometer zinc oxide product. According to the system and method for industrially recycling zinc to produce nanometer zinc oxide, by combining an ammonia process and a rotary hearth furnace technology, the zinc in the zinc-containing materials is deeply recycled in a crossing combination manner, the zinc in the zinc-containing materials is completely recycled, and the grade of the produced zinc-containing product is 95% or more.

Description

technical field [0001] The invention belongs to the technical field of chemical industry and metallurgy, and in particular relates to a system and method for producing nanometer zinc oxide by recovering zinc from zinc-containing materials. That is, the use of rotary hearth furnace and ammonia leaching process to jointly recover zinc to produce nano-zinc oxide (including high-purity zinc oxide). Background technique [0002] Iron and steel, nonferrous metallurgy, chemical industry and other industries produce a large amount of zinc-containing materials in the production process. These materials are also rich in elements with recycling and utilization value such as iron and carbon, and the zinc content of various materials is different. Therefore, it is difficult to comprehensively recover zinc and iron with a single production process to produce zinc and iron-containing products with high added value and high utilization value. [0003] At present, there are two main methods...

Claims

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Application Information

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IPC IPC(8): C01G9/02C01F11/18B82Y30/00C22B7/00C22B19/34C22B19/30
CPCC01G9/02C01F11/18B82Y30/00C22B7/001C22B7/008C22B19/34C22B19/30Y02P20/129Y02P10/20Y02P20/10
Inventor 罗宝龙郭灵巧罗磊雍海泉
Owner CHONGQING CISDI THERMAL & ENVIRONMENTAL ENG CO LTD
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