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

Direct vitrification arsenic fixation method for arsenite-containing arsenic-containing material

An arsenite and vitrification technology, used in chemical instruments and methods, solid waste removal, transportation and packaging, etc. Long process and other problems, to achieve the effect of wide application, harmless treatment and simple treatment method

Active Publication Date: 2021-04-30
ZIJIN MINING GROUP +1
View PDF20 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of these vitrification arsenic fixation methods for arsenic-containing materials are long process flow and high pretreatment cost.
At present, there is no research or authorized patent on the direct vitrification of arsenic-containing materials mainly arsenite

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
  • Direct vitrification arsenic fixation method for arsenite-containing arsenic-containing material
  • Direct vitrification arsenic fixation method for arsenite-containing arsenic-containing material
  • Direct vitrification arsenic fixation method for arsenite-containing arsenic-containing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] This embodiment provides a method for direct vitrification of arsenic-containing materials mainly composed of ferric arsenite to fix arsenic. like figure 1 As shown, the specific steps of the method in this embodiment are as follows:

[0040] Wherein said arsenic-containing material is the ferrous arsenite slag (arsenic and iron contents are respectively As 32.08%, Fe 27.12%).

[0041]The glass substrate contains copper smelting slag (the main component is: Fe 2 o 3 63.6%, SiO 2 23.75%, As 2 o 3 0.264%, Al 2 o 3 2.86%, CaO 1.76%, MgO 1.08%), quartz sand and sodium carbonate.

[0042] Mix the arsenic-containing material, copper smelting slag, quartz sand, and sodium carbonate according to the mass ratio of 27:20:36:14.2, grind them to a powder with a particle size of 0.8mm, and preheat at 250°C for 2.0h (preheat treatment The advantage is to slowly heat the mixture in advance to remove moisture and reduce the impact on the high-temperature melting process), ...

Embodiment 2

[0044] This embodiment provides a method for direct vitrification of arsenic-containing materials mainly composed of ferric arsenite to fix arsenic.

[0045] The arsenic-containing material is the ferrous arsenite slag obtained by adding ferric sulfate to deposit arsenic after the arsenic-containing polluted acid (As 8.86g / L) is neutralized by lime to reduce the acidity (the arsenic and iron contents are respectively As 32.08%, Fe 27.12% %), the glass substrate contains quartz sand and sodium carbonate.

[0046] The specific steps of the present embodiment method are as follows:

[0047] Mix the arsenic-containing material, quartz sand, and sodium carbonate according to the mass ratio of 58.65:26.6:14.75, grind to a powder with a particle size of 0.6mm, and preheat at 100°C for 0.5h. Then heat up to 1400°C for high temperature melting and heat preservation for 2 hours. After the reaction is completed, it is naturally cooled with the furnace to obtain arsenic-containing glass...

Embodiment 3

[0049] This embodiment provides a method for vitrifying arsenic fixation using calcium arsenite as the main arsenic-containing material.

[0050] The arsenic-containing material is calcium arsenite slag obtained from arsenic-containing polluted acid (As 10.8g / L) through lime neutralization and precipitation (As and calcium contents are respectively As 31.39%, Ca 28.9%), and the glass substrate contains quartz sand and sodium carbonate.

[0051] The specific steps of the present embodiment method are as follows:

[0052] Mix arsenic-containing materials, quartz sand, and sodium carbonate at a mass ratio of 21:57:22, grind them to a powder with a particle size of 0.4mm, preheat at 550°C for 10 minutes, and then heat up to 1350°C for high temperature melting and heat preservation for 1 hour. After the reaction is completed, it is naturally cooled with the furnace to obtain arsenic-containing glass solidified body. The composition (mass percentage) of the arsenic-containing glas...

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 direct vitrification arsenic fixation method for an arsenite-containing arsenic-containing material. The method comprises the following steps: arsenic precipitation: adding a pH regulator into an arsenic-containing solution, and separating soluble arsenite (salt) in the arsenic-containing solution in a precipitation form; mixing and burdening: uniformly mixing the arsenite-containing arsenic-containing material and a glass substrate according to a designed mass ratio, crushing and grinding; preheating treatment: preheating the mixture at 100-550 DEG C, collecting dust generated in the preheating treatment process, and returning the dust to the mixed ingredients; high-temperature melting: heating the preheated mixture to 1000-1400 DEG C for melting, collecting smoke dust generated in the high-temperature melting process, and returning the smoke dust to the mixed ingredients; and cooling: cooling the material obtained by high-temperature melting to form an arsenic-containing glass solidified body. According to the method, the technological process is shortened, the arsenic fixing cost is reduced, stable and harmless treatment of arsenic-containing waste residues is achieved, and the environmental pollution risk is reduced.

Description

technical field [0001] The invention relates to the technical field of harmless disposal of hazardous waste, in particular to a method for directly vitrifying arsenic-containing materials containing arsenite. Background technique [0002] Arsenic is an inherent element that exists widely in nature. Its organic and inorganic compounds have varying degrees of toxicity and are extremely harmful to the environment. Key prevention elements. Arsenic is a sulfur-friendly element and is a common element in sulfide ore resources such as copper, lead, and zinc. In the process of resource development, arsenic enters waste gas, wastewater, and waste residue in different forms. In recent years, the gradual increase of arsenic content in non-ferrous metal ore resources has become a common problem, and with the rapid economic development, the demand for ore raw materials is increasing day by day, so arsenic-containing materials, especially arsenic-containing waste, are also significantly ...

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
Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00B09B5/00A62D3/33A62D101/43
CPCB09B3/00B09B5/00A62D3/33A62D2101/43B09B3/40
Inventor 王乾坤肖琴许涛庄荣传陈景河郭先健林鸿汉廖元杭许晓阳
Owner ZIJIN MINING GROUP
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