Method for preparing raw material for manganese series ferroalloy from waste zinc-manganese dry batteries

A zinc-manganese dry battery and ferroalloy technology, applied in the field of raw materials for the preparation of manganese-based ferroalloys, can solve the problems of unfeasible economy, complex procedures, and high costs, and achieve the effects of low overall cost, simple process flow, and high recycling efficiency

Inactive Publication Date: 2014-01-29
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are also many domestic studies on the recycling and utilization of waste zinc-manganese dry batteries, such as Cheng Jianliang et al. "Recycling waste zinc-manganese batteries to prepare manganese-zinc ferrite" (see: China Manganese Industry, Vol. 22, No. 1, 2004 2 1), Cui Peiying et al.'s "Research on the Preparation of Zinc-Manganese Compound Fertilizers Using Waste Batteries" (see: Chemistry World, Issue 1, Volume 44), etc., and the patent on the recycling method of waste zinc-manganese dry batteries includes "Leaching Method Recycling Dry Batteries "(Refer to: Chinese Invention Patent, CN1402368A, 2003-03-12), "Method of Recycling Zinc and Manganese from Waste Dry Batteries and Directly Prepare Industrial Desulfurizer" (Refer to: Chinese Invention Patent, CN101532088A, 2009-09-16), etc. , but due to the complex process, high cost, economic impossibility or technical defects, there is no technology suitable for industrialized recycling of waste zinc-manganese dry batteries, and it only stays at the laboratory scale.

Method used

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  • Method for preparing raw material for manganese series ferroalloy from waste zinc-manganese dry batteries

Examples

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Effect test

Embodiment 1

[0026] Embodiment 1: Do not reclaim the zinc in the waste zinc-manganese dry battery

[0027] (1) Regardless of ordinary zinc-manganese dry batteries and alkaline zinc-manganese dry batteries, use a hammer crusher to crush waste zinc-manganese dry batteries.

[0028] (2) Put the mixture treated in step (1) into a vacuum heating furnace, set the pressure to 500Pa, raise the temperature to 280~320°C, keep it for 2~3 hours, exhaust the furnace gas and remove dust, and then use the condenser to cool Below 100°C, the mercury vapor condenses into metallic mercury particles on the inner wall of the condenser, which is recovered by regular water washing.

[0029] (3) Return the system pressure to normal pressure and continue heating for 1 hour to decompose and evaporate other volatile substances.

[0030] (4) Cool the residue in the vacuum heating furnace to room temperature with the furnace, and sieve the residue mixture. The mixture contains iron sheets, copper sheets and mangan...

Embodiment 2

[0034] Embodiment 2: Recycling of zinc in waste zinc-manganese dry batteries without adding quicklime under normal pressure

[0035] (1) Regardless of ordinary zinc-manganese dry batteries and alkaline zinc-manganese dry batteries, use a hammer crusher to crush waste zinc-manganese dry batteries.

[0036] (2) Send the mixture treated in step (1) into a vacuum heating furnace, set the pressure to 500Pa, raise the temperature to 280~320°C, keep it for 2~3 hours, exhaust the furnace gas and cool it to 100°C with a condenser Below ℃, the mercury vapor condenses into metal mercury particles on the inner wall of the condenser, which is recovered by regular water washing.

[0037] (3) Return the system pressure to normal pressure, raise the temperature to 950~1050°C, and keep it for 2 hours to decompose and evaporate zinc and other volatile substances.

[0038] (4) Extract the furnace gas, remove dust, and cool down to below 500°C through the condenser to condense the zinc oxide. ...

Embodiment 3

[0043] Embodiment 3: Vacuum treatment does not add unslaked lime to the recovery of zinc in waste zinc-manganese dry batteries

[0044] (1) Regardless of ordinary zinc-manganese dry batteries and alkaline zinc-manganese dry batteries, use a hammer crusher to crush waste zinc-manganese dry batteries.

[0045] (2) Put the mixture treated in step (1) into a vacuum heating furnace, set the pressure to 500Pa, raise the temperature to 280~320°C, keep it for 2~3 hours, exhaust the furnace gas and cool it down to 100°C with a condenser Next, the mercury vapor is condensed into metal mercury particles on the inner wall of the condenser, which is recovered by regular water washing.

[0046] (3) Increase the pressure of the system to 250-300Pa, raise the temperature to 850-950°C, and keep it for 1.5 hours to decompose and evaporate zinc and other volatile substances.

[0047] (4) Extract the furnace gas, remove dust, and cool down to below 500°C through the condenser to condense the zin...

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Abstract

The invention discloses a method for preparing a raw material for a manganese series ferroalloy from waste zinc-manganese dry batteries, and belongs to the fields of harmless treatment to waste batteries as well as substance reutilization. The method comprises the following steps: firstly, crushing the waste dry batteries by a hammer crusher to obtain a mixture; heating the mixture in a vacuum heating furnace; discharging furnace gas and removing dust; recovering mercury by a condenser; increasing temperature to decompose and evaporate volatile substances; cooling residues in the vacuum heating furnace to room temperature along with the vacuum heating furnace; performing screening to remove iron sheets, copper sheets and the like; and adding a binding agent for pelletizing to obtain finished manganese pellets which can directly serve as the raw material for preparing the manganese series ferroalloy. The method is simple in technological process, high in recycling efficiency of manganese from the batteries, small in energy consumption of recovering, low in equipment investment, free of secondary pollution, and capable of harmlessly recycling waste zinc-manganese dry batteries.

Description

technical field [0001] The invention relates to harmless treatment and material reuse of waste batteries, in particular to a method for recycling waste zinc-manganese dry batteries to prepare raw materials for manganese-based ferroalloys. Background technique [0002] my country is a big producer and consumer of dry batteries, among which most dry batteries are disposable zinc-manganese dry batteries. If the waste zinc-manganese dry batteries are not recycled and processed, the industrial raw materials such as manganese and zinc cannot be recycled and utilized, and a large amount will be buried underground with domestic waste, causing soil and groundwater pollution. At present, the country attaches great importance to the research on the recycling of waste zinc-manganese dry batteries, but there is no good practical application method for the treatment of waste zinc-manganese dry batteries, such as using the curing method to treat waste zinc-manganese dry batteries after lan...

Claims

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Application Information

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IPC IPC(8): H01M6/52C22B7/00
CPCY02W30/84H01M6/52C22B7/001C22B7/004
Inventor 章俊王振吴宝国
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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