Zinc concentrate oxygen pressure acid leaching high-sulfur slag safety analysis method

A technology of oxygen pressure acid leaching and analysis method, which is applied in the field of safety analysis of zinc concentrate oxygen pressure acid leaching high-sulfur slag, can solve problems such as complex occurrence characteristics of toxic elements, achieve a comprehensive understanding of ignition characteristics, reduce errors, and alleviate The effect of environmental pressure

Active Publication Date: 2020-09-08
CENT SOUTH UNIV
View PDF9 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The occurrence characteristics of valuable components and toxic elements in slag are complex, and it is necessary to have a detailed understandin

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
  • Zinc concentrate oxygen pressure acid leaching high-sulfur slag safety analysis method
  • Zinc concentrate oxygen pressure acid leaching high-sulfur slag safety analysis method
  • Zinc concentrate oxygen pressure acid leaching high-sulfur slag safety analysis method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0076] 1 Determination of ignition point

[0077] 1.1 Using the Mettler 1100LF thermogravimetric analyzer to obtain the thermogravimetric curve of oxygen pressure acid leaching high sulfur slag in a large-scale wet zinc smelting plant in South China at a heating rate of 5°C / min in the air environment, as shown in figure 1 shown.

[0078] 1.1 Fixed weight loss method: the temperature point corresponding to the point on the combustion curve when the weight loss rate reaches 10% is defined as the ignition point, such as figure 1 Shown at point B. According to this definition, the ignition temperature of high-sulfur slag is 236.97°C.

[0079] 1.2 TG-DTG method: Select the minimum peak point on the DTG curve as a vertical line intersecting with the TG line at point C, which is the abrupt combustion point. The intersection point D of the tangent line passing through point C of the TG curve and the parallel line at the beginning of weight loss corresponds to the ignition temperatu...

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 belongs to the technical field of harmful solid waste determination and particularly relates to a zinc concentrate oxygen pressure acid leaching high-sulfur slag safety analysis method.The zinc concentrate oxygen pressure acid leaching high-sulfur slag safety analysis method comprises steps that the ignition point and leaching toxicity of zinc concentrate oxygen pressure acid leaching high-sulfur slag and an occurrence form of heavy metal toxic elements are measured, and safety of the zinc concentrate oxygen pressure acid leaching high-sulfur slag is analyzed based on the measurement result. The method is helpful for improving the safety degree of links such as collection, storage, transportation, reutilization and disposal of the high-sulfur slag, can analyze and evaluate the environmental hazard risk, and can further be extensively applied to other non-ferrous smelting waste slag.

Description

Technical field: [0001] The invention belongs to the technical field of hazard assessment of harmful solid waste, and in particular relates to a method for analyzing the safety of high-sulfur slag from oxygen pressure acid leaching of zinc concentrate. Background technique: [0002] my country is a big producer and consumer of non-ferrous metals, and its zinc production and consumption have ranked first in the world for many years. The mainstream zinc sulfide concentrate direct leaching process will produce a large amount of high-sulfur slag, which is a highly toxic and hazardous waste. Its collection, storage, transportation, utilization and disposal are all managed as hazardous waste. If it is not processed safely and resourced, It may face problems such as paying high taxes and disposal fees every year. At the same time, if the pollutants in the slag cannot be completely removed, it will seriously endanger the health of residents, animal husbandry, agriculture and urban ...

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): G01N25/22G01N21/73G01N27/62G01N21/64G01N5/04G01N27/626
CPCG01N25/22G01N5/04G01N21/6404G01N27/62G01N21/73
Inventor 何静胡方园代杰陈永明
Owner CENT SOUTH UNIV
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
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap