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Mercury-containing waste processing method

A processing method and waste technology, applied in the field of mercury-containing waste processing, can solve the problems of waste of mercury resources, low recovery rate, harm to the ecological environment and human health, etc., and achieve the effects of low cost and simple process

Inactive Publication Date: 2021-01-22
新晃鲁湘钡业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, smelting enterprises usually store waste residues with low mercury content directly or directly landfill them after treatment. However, mercury-containing waste residues are hazardous wastes. If they are not strictly treated, they will seriously endanger the ecological environment and human health. serious waste; therefore, in order to effectively control mercury pollution and recover mercury resources, it is necessary to adopt safe and effective treatment methods for mercury-containing waste
The environmental pollution and waste of mercury resources caused by mercury-containing waste landfill are serious, and the existing technology has problems such as low recovery rate and inconvenient operation, so it is necessary to provide a method for recovering mercury in mercury-containing waste

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A method for processing lead smelting acid mud, comprising the following steps:

[0044] (1) Dry mercury-containing waste: put the mercury-containing waste into a closed reactor, and pass inert gas to dry at 150°C for 5 hours;

[0045](2) add chlorination agent to the mercury-containing waste after drying, and carry out mixing and stirring, obtain mixed material;

[0046] (3) Add the mixed material obtained in step (2) into a closed reactor, then feed oxygen into the reactor, and keep the heating temperature at 300°C;

[0047] (4) passing the flue gas produced by the reactor into the circulating solvent storage tank, and the absorption liquid in the circulating solvent storage tank absorbs the flue gas in a circular manner;

[0048] (5) Filtrating the absorption liquid obtained in step (4) to obtain mercuric oxide solid.

[0049] Wherein the chlorinating agent described in the step (2) is sodium chloride, the heating rate of the airtight reactor in the step (3) is 7 D...

Embodiment 2

[0051] A method for processing lead smelting waste slag, comprising the following steps:

[0052] (1) Dry mercury-containing waste: put the mercury-containing waste into a closed reactor, and pass inert gas to dry at 180°C for 5 hours;

[0053] (2) add chlorination agent to the mercury-containing waste after drying, and carry out mixing and stirring, obtain mixed material;

[0054] (3) Add the mixed material obtained in step (2) into a closed reactor, then feed oxygen into the reactor, and keep the heating temperature at 380°C;

[0055] (4) passing the flue gas produced by the reactor into the circulating solvent storage tank, and the absorption liquid in the circulating solvent storage tank absorbs the flue gas in a circular manner;

[0056] (5) Filtrating the absorption liquid obtained in step (4) to obtain mercuric oxide solid.

[0057] Wherein the chlorination agent described in the step (2) is calcium chloride, and the heating rate of the airtight reactor in the step (3...

Embodiment 3

[0059] A method for processing lead smelting waste slag, comprising the following steps:

[0060] (1) Dry mercury-containing waste: put the mercury-containing waste into a closed reactor, and pass inert gas at 200° C. for 6 hours;

[0061] (2) add chlorination agent to the mercury-containing waste after drying, and carry out mixing and stirring, obtain mixed material;

[0062] (3) Add the mixed material obtained in step (2) into a closed reactor, then feed oxygen into the reactor, and keep the heating temperature at 360°C;

[0063] (4) passing the flue gas produced by the reactor into the circulating solvent storage tank, and the absorption liquid in the circulating solvent storage tank absorbs the flue gas in a circular manner;

[0064] (5) Filtrating the absorption liquid obtained in step (4) to obtain mercuric oxide solid.

[0065] Wherein the chlorination agent described in the step (2) is sodium chloride, and the heating rate of the airtight reactor in the step (3) is 8...

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PUM

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Abstract

The invention discloses a mercury-containing waste processing method. The method comprises the following steps of (1) drying mercury-containing waste, namely putting the mercury-containing waste intoa closed reactor, introducing inert gas at 100-200 DEG C, and drying for 0.5-10 hours; (2) adding a chlorinating agent into the dried mercury-containing waste, and performing mixing and stirring to obtain a mixed material; (3) adding the mixed material obtained in the step (2) into the closed reactor, introducing oxygen into the reactor, and keeping the heating temperature at 300-400 DEG C; and (4) introducing flue gas generated by the reactor into a circulating solvent storage tank, and circularly absorbing the flue gas by absorption liquid in the circulating solvent storage tank. The mercury-containing waste processing method provided by the invention has the advantages of simple process, low cost, cyclic utilization of waste, greenness and environmental protection.

Description

technical field [0001] The invention relates to the technical field of comprehensive treatment and utilization of mercury-containing waste, and more specifically relates to a method for processing mercury-containing waste. Background technique [0002] Mercury is a silvery-white liquid metal that is highly volatile at room temperature. It is widely used in industrial sectors such as chemical and petrochemical industries, pharmaceuticals, pulp and paper, electrical and electronic instruments, and is known as "exhaust gas, waste residue, waste water". ways to pollute the environment. Due to its long-distance migration, high toxicity, and bioaccumulation, mercury has attracted widespread attention. It is a heavy metal pollutant that is harmful to human health and the ecological environment. In 2013, 92 countries and regions, including China, signed the Minamata Convention on Mercury in the United Nations to reduce the harm of mercury, which is a milestone in global mercury pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B43/00
CPCC22B7/002C22B43/00Y02P10/20
Inventor 龙凤华王瑞辉
Owner 新晃鲁湘钡业有限公司