Method for preparing zinc oxide ultrafine powder by using zinc skins of waste zinc-manganese batteries

A zinc-manganese battery, zinc oxide technology, applied in chemical instruments and methods, zinc oxide/zinc hydroxide, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of low added value of recycled products, pollution, resources environmental waste

Pending Publication Date: 2021-08-31
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims at solving the problems of resource waste and environmental pollution caused by waste zinc-manganese dry batteries, and proposes a simple, efficient and pollution-free recycling method for the current situation that the existing technology for recycling waste zinc-manganese dry batteries is insufficient and the added value of recycled products is low. Method for preparing zinc oxide superfine powder from zinc skin of waste zinc-manganese dry battery

Method used

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  • Method for preparing zinc oxide ultrafine powder by using zinc skins of waste zinc-manganese batteries
  • Method for preparing zinc oxide ultrafine powder by using zinc skins of waste zinc-manganese batteries
  • Method for preparing zinc oxide ultrafine powder by using zinc skins of waste zinc-manganese batteries

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Embodiment 1

[0044]First, the waste zinc-manganese battery is disassembled and separated, and the obtained zinc skin is cut into pieces and put into the crucible, and then the crucible is put into the heating chamber of the vacuum furnace. Place a glass slide in the cooling chamber as a collection substrate. For details on the location of the crucible and collection base, see figure 1 shown. After the vacuum furnace is sealed, start the vacuum pump group to exhaust the air in the furnace, so that the vacuum degree in the furnace is at 0.1Pa, so as to avoid the metal from being oxidized during the heating process. First turn on the heating switch of the heating chamber (reaction chamber), and heat the reaction chamber to 450°C at a heating rate of 10°C / min. 2000Pa, then continue to heat until the temperature reaches 850°C, and keep it for 30 minutes. Zinc oxide vapor enters the condensation chamber with the air flow, and the condensation temperature is controlled at 50°C. Due to the huge ...

Embodiment 2

[0046] First, the waste zinc-manganese battery is disassembled and separated, and the obtained zinc skin is cut into pieces and put into the crucible, and then the crucible is put into the heating chamber of the vacuum furnace. Place a glass slide in the cooling chamber as a collection substrate. For details on the location of the crucible and collection base, see figure 1 shown. After the vacuum furnace is sealed, start the vacuum pump group to exhaust the air in the furnace, so that the vacuum degree in the furnace is at 1Pa, so as to avoid the metal from being oxidized during the heating process. First turn on the heating switch of the reaction chamber, and heat the reaction chamber to 450°C at a heating rate of 10°C / min (if the temperature is lower than 400°C, zinc will not evaporate to the gas phase, and zinc oxide powder cannot be generated; if the temperature is higher than 500°C, If zinc enters the gas phase too early, it will be directly condensed into zinc powder (...

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Abstract

The invention discloses a method for preparing nano-zinc oxide ultrafine powder by using waste zinc-manganese batteries. The method comprises the following steps: disassembling and separating the waste zinc-manganese batteries to obtain zinc skins, heating under a vacuum condition, adjusting the proportion of the two gases by using oxygen as an oxidizing agent and nitrogen as a carrier gas through a gas mass flow meter, and preparing the nano zinc oxide ultrafine powder by utilizing the temperature difference gradient of the heating chamber and the condensing chamber under the operation conditions of certain heating temperature, gas proportion, pressure intensity, condensing temperature, collecting substrate and the like. The waste zinc-manganese batteries can be effectively recycled, meanwhile, the method can also be applied to recovery of crude zinc waste with high zinc content, high-added-value products are prepared while environmental heavy metal zinc pollution is reduced, and the method has the advantages of being easy to operate, efficient, environmentally friendly and the like.

Description

technical field [0001] The invention belongs to the high-value recycling of electronic waste resources in the field of environmental protection and resource recycling comprehensive utilization, relates to the resource recovery of zinc in electronic waste and the preparation of ultrafine zinc oxide powder, and specifically relates to a method for utilizing waste zinc and manganese A method for preparing zinc oxide superfine powder from battery zinc skin. Background technique [0002] The world produces more than 60 billion zinc-manganese batteries every year, and the production of batteries consumes a lot of mineral resources. For zinc resources, the relationship between the energy required to recover it and the energy required to extract it from virgin zinc ore is 2.2:8. Although the micro-mercury and mercury-free zinc-manganese batteries have been basically achieved, the existence of zinc, manganese, and spent alkali still pollutes the environment, especially water and soi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/03B82Y40/00B01J23/06A62D3/17A62D101/26A62D101/28
CPCC01G9/03B82Y40/00B01J23/06A62D3/17C01P2006/80C01P2004/30C01P2004/03C01P2002/72A62D2101/26A62D2101/28B01J35/39
Inventor 詹路许振明李欧阳张灵恩牛博
Owner SHANGHAI JIAO TONG UNIV
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