Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method using microwave heating to treat mercury-containing acid sludge

A technology of microwave heating and acid mud, applied in the direction of mercury halide, improvement of process efficiency, etc., can solve the problems of high environmental pressure, unfavorable resource recycling, resource waste, etc., and achieve efficient recovery, large environmental benefits and economic benefits, process The effect of cleaning and environmental protection

Pending Publication Date: 2019-01-04
KUNMING UNIV OF SCI & TECH
View PDF8 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former will cause excessive pressure on the environment and waste resources; the latter is not conducive to the recycling of resources. These sludges contain a large amount of valuable metals, such as mercury, lead, zinc, etc.
Obviously, there are deficiencies in the existing treatment status. In order to reduce environmental pressure and reduce resource waste, it is an urgent problem to find a method for recycling mercury-containing acid mud resources.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: a kind of method of microwave heat treatment mercury-containing acid mud, concrete steps are as follows:

[0019] (1) First, 100g of mercury-containing acid mud (HgCl 2 The content of HgS is 3wt%, and the content of HgS is 8wt%) in a tube microwave oven, and dried for 6min at a temperature of 120°C.

[0020] (2) Pass the mercury-containing acid mud dried in step (1) into nitrogen gas, and heat it with microwave for 5 minutes at a temperature of 200°C to obtain HgS-containing acid mud and HgCl 2 steam.

[0021] (3) HgCl obtained in step (2) 2 After the steam is condensed and dissolved in water, a mercuric chloride solution is obtained.

[0022] (4) In an oxygen atmosphere, microwave the acid mud containing HgS obtained in step (2) at a temperature of 500°C for 5 minutes to obtain elemental mercury vapor.

[0023] (5) Condensing the vapor of elemental mercury in step (4) to obtain liquid metal elemental mercury.

[0024] In this implementation case, the...

Embodiment 2

[0025] Embodiment 2: a kind of method of microwave heat treatment mercury-containing acid mud, concrete steps are as follows:

[0026] (1) First, 100g of mercury-containing acid mud (HgCl 2 The content of HgS is 3wt%, and the content of HgS is 8wt%) in a tube microwave oven, and dried at a temperature of 60°C for 15min.

[0027] (2) Pass the mercury-containing acid mud dried in step (1) into nitrogen gas, and microwave for 50 minutes at a temperature of 300°C to obtain acid mud and HgCl whose main components are HgS 2 steam.

[0028] (3) HgCl obtained in step (2) 2 After the steam is condensed and dissolved in water, a mercuric chloride solution is obtained.

[0029] (4) In an oxygen atmosphere, microwave the acid mud containing HgS obtained in step (2) at a temperature of 450°C for 20 minutes to obtain elemental mercury vapor.

[0030] (5) Condensing the vapor of elemental mercury in step (4) to obtain liquid metallic elemental mercury.

[0031] In this implementation ca...

Embodiment 3

[0032] Embodiment 3: a kind of method of microwave heat treatment mercury-containing acid mud, concrete steps are as follows:

[0033] (1) First, 100g of mercury-containing acid mud (HgCl 2 The content of HgS is 3wt%, and the content of HgS is 8wt%) in a tube microwave oven, and dried at 200°C for 20min.

[0034] (2) Pass the mercury-containing acid mud dried in step (1) into nitrogen gas, and heat it with microwave for 110 minutes at a temperature of 400°C to obtain HgS-containing acid mud and HgCl 2 steam.

[0035] (3) HgCl obtained in step (2) 2 After the steam is condensed and dissolved in water, a mercuric chloride solution is obtained.

[0036] (4) In an oxygen atmosphere, microwave the acid mud containing HgS obtained in step (2) at a temperature of 400°C for 30 minutes to obtain elemental mercury vapor.

[0037] (5) Condensing the vapor of elemental mercury in step (4) to obtain liquid metallic elemental mercury.

[0038] In this implementation case, the total rem...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method using microwave heating to treat mercury-containing acid sludge and belongs to the technical field of solid waste treatment and recycling. The method includes: sequentially subjecting the mercury-containing acid sludge to drying and microwave heating under inert gas protection to obtain HgS-containing acid sludge and HgCl2 steam; subjecting the HgCl2 steam to condensation and dissolving with water to obtain a mercuric chloride solution for a mercury waste medium; subjecting the HgS-containing acid sludge to microwave calcining in oxygen atmosphere to obtain elemental mercury steam, and subjecting the obtained Hg steam to condensation to obtain pure elemental mercury. The method has the advantages by subjecting the mercury-containing acid sludge to microwaveheating, mercuric chloride and the elemental mercury can be efficiently recycled, and the method is simple in process flow, clean and environmentally friendly, cheap in raw materials and huge in environmental benefits and economic benefits.

Description

technical field [0001] The invention relates to a method for treating mercury-containing acid mud by microwave heating, and belongs to the technical field of solid waste treatment and recovery. Background technique [0002] At present, the methods of treating mercury-containing acid mud that are widely used in the industry are mainly to bury waste or serve as raw materials for road construction, bricks and cement. The former will cause excessive pressure on the environment and waste resources; the latter is not conducive to the recycling of resources, and these sludges contain a large amount of valuable metals, such as mercury, lead, and zinc. Obviously, there are deficiencies in the existing treatment status. In order to reduce environmental pressure and reduce resource waste, it is an urgent problem to find a method for recycling mercury-containing acid mud resources. Contents of the invention [0003] The object of the present invention is to provide an environmentally...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C22B7/00C22B43/00C01G13/04
CPCC22B7/00C22B43/00C01G13/04Y02P10/20
Inventor 张利波刘健刘晨辉林国程松
Owner KUNMING UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com