Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Disposal method of multi-metal coexistence hazardous wastes

A disposal method and technology for hazardous waste, applied in the direction of improving process efficiency, etc., can solve the problems of non-ferrous metal resource recycling, hidden dangers caused by secondary pollution, etc., and achieve resource recycling and environmental reduction. Harm, pollution reduction effect

Inactive Publication Date: 2018-03-27
姚元勋
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the treatment methods for heavy metal pollution from non-ferrous metal waste mainly include solidification / stabilization technology, landfill, incineration heat treatment, microbial treatment, cement kiln co-processing and other technologies. Recycling and Utilization of Nonferrous Metals

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Disposal method of multi-metal coexistence hazardous wastes
  • Disposal method of multi-metal coexistence hazardous wastes
  • Disposal method of multi-metal coexistence hazardous wastes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Such as figure 1 Shown, a kind of disposal method of polymetallic coexistence hazardous waste comprises the following steps:

[0023] First of all, the materials of polymetallic mixed hazardous waste (such as the mixture of HW17, etc.) are explained: because the phenomenon of coexistence of HW17 metal ions in hazardous waste is the most complicated, while HW21 / HW22 / HW23 / HW46 is relatively simple, so we use HW17 as an example) mixed with water according to the weight ratio of 1:3.5-5.5 to make a slurry, the temperature is controlled below 65 degrees (the specific temperature is adjusted according to the specific material of the reactor), and 98% concentrated sulfuric acid is added to the slurry , stirred until fully reacted, the pH value at the end point was controlled between 0.5-1, and the solid and liquid were separated to obtain leachate A and solid.

[0024] Then, extract Zn, Cu, Ni, Fe, Cr, and Ca in polymetallics sequentially from the leaching solution A and the ...

Embodiment 2

[0100] Such as figure 1 Shown, a kind of disposal method of polymetallic coexistence hazardous waste comprises the following steps:

[0101] First of all, the materials of polymetallic mixed hazardous waste (such as the mixture of HW17, etc.) are explained: because the phenomenon of coexistence of HW17 metal ions in hazardous waste is the most complicated, while HW21 / HW22 / HW23 / HW46 is relatively simple, so we use HW17 as an example) mixed with water according to the weight ratio of 1:3-5 to make a slurry, the temperature is controlled below 65 degrees (the specific temperature is adjusted according to the specific material of the reactor), and 98% concentrated sulfuric acid is added to the slurry , stirred until fully reacted, the pH value at the end point was controlled between 0.5-1, and the solid and liquid were separated to obtain leachate A and solid.

[0102] Then, extract Zn, Cu, Ni, Fe, Cr, and Ca in polymetallics sequentially from the leaching solution A and the soli...

Embodiment 3

[0177] Such as figure 1 Shown, a kind of disposal method of polymetallic coexistence hazardous waste comprises the following steps:

[0178] First of all, the materials of polymetallic mixed hazardous waste (such as the mixture of HW17, etc.) are explained: because the phenomenon of coexistence of HW17 metal ions in hazardous waste is the most complicated, while HW21 / HW22 / HW23 / HW46 is relatively simple, so we use HW17 as an example) mixed with water according to the weight ratio of 1:3.5-5.5 to make a slurry, the temperature is controlled below 65 degrees (the specific temperature is adjusted according to the specific material of the reactor), and 98% concentrated sulfuric acid is added to the slurry , stirred until fully reacted, the pH value at the end point was controlled between 0.5-1, and the solid and liquid were separated to obtain leachate A and solid.

[0179] Then, extract Zn, Cu, Ni, Fe, Cr, and Ca in polymetallics sequentially from the leaching solution A and the ...

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 disposal method of multi-metal coexistence hazardous wastes. The method comprises the following steps that firstly, multi-metal blended hazardous wastes and water are blendedand mixed according to the weight proportion of 1:(3-5), slurry is made, concentrated sulfuric acid with the concentration being 98% is added into the slurry, stirring is performed until thorough reaction is completed, the final PH value is controlled within the range of 0.5-1, solid-liquid separation is performed, and leachate A and a solid body are obtained; and secondly, Zn, Cu, Ni, Fe, Cr andCa in multi-metal in the leachate A and the solid body are extracted stepwise in sequence, wherein the extraction sequence is Ca-Cu-Fe and Cr-Ni-Zn-Fe-Cr. The method that all metal elements in a multi-metal mixture are extracted stepwise is achieved, the waste resource recycling is achieved, energy is saved, emission is reduced, a harmless and slag-free treatment process is achieved, harm of hydrometallurgical tailings to the environment and occupation of the hydrometallurgical tailings on the land resources are reduced, and pollution of heavy metal waste heaps to the environment is reduced.

Description

technical field [0001] The invention relates to a harmless resource regeneration method for polymetallic pollution by hazardous waste, in particular to a disposal method for polymetallic coexisting hazardous waste. Background technique [0002] At present, the treatment methods for heavy metal pollution from non-ferrous metal waste mainly include solidification / stabilization technology, landfill, incineration heat treatment, microbial treatment, cement kiln co-processing and other technologies. Recycling of non-ferrous metals. Due to the depletion of resources and the aggravation of environmental pollution, the recycling of non-ferrous metal waste as an important heavy metal resource has always been the focus of research at home and abroad. As a cheap secondary resource, non-ferrous metal waste can be turned into treasure as long as proper treatment methods are adopted, bringing considerable economic and environmental benefits. With the rapid development of economy and soc...

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): C22B7/00C22B15/00C22B19/20C22B19/30C22B23/00C22B26/20C22B34/32
CPCC22B7/007C22B15/0091C22B19/20C22B19/30C22B23/0469C22B26/20C22B34/32Y02P10/20
Inventor 蒙焕洪姚元勋
Owner 姚元勋
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
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