Treatment process for arsenic sulfide containing material

A treatment process, arsenic sulfide technology, applied in the field of metallurgy, can solve the problems of high equipment material requirements, incomplete reaction, poor reduction effect, etc., achieve high resource utilization rate, avoid large-scale pollution, and high recovery rate

Inactive Publication Date: 2018-07-24
CHINA NERIN ENG
View PDF8 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reduction effect of this method is poor. Trivalent arsenic needs to be crystallized by cooling down, which consumes a lot of energy. The sulfur element generated during the reaction will also cover the surface of the reactant, resulting in incomplete reaction.
[0007]

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
  • Treatment process for arsenic sulfide containing material

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0030] Example 1

[0031] A process for treating materials containing arsenic sulfide. The process flow is as follows: 1) Add 4t of arsenic sulfide filter cake (50% water content) into a 10m³ vacuum reaction tank, and add 8m³ dilute sulfuric acid with a concentration of 8%-20%. Add surfactant A, start the stirring paddle, pass the heating coil into the steam to heat up the slurry, heat up the slurry to 80~100℃ and then slurry for 2~4h, and send it to the oxidation reactor through the hose pump; 2) to the oxidation reactor Pass in 1.2MPa compressed air, react with the slurry in the oxidation reactor, control the reaction temperature at 90~180℃, reaction pressure 1.0MPa, oxidation reactor stirring speed 600rpm, reaction residence time 2h; 3) Pump liquid after oxidation reaction The oxidation cooling tank is then sent to the filter to filter. The main component of the leaching residue is sulfur, which can be returned to the smelting system as fuel, and the filtrate is sent to the re...

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 treatment process for an arsenic sulfide containing material. The treatment process for the arsenic sulfide containing material comprises three main steps: pulpifying of theraw material, oxygen pressure acid leaching, and reducing and separating. The liquid-solid mass ratio is 3:1 to 10:1 in the pulpifying of the raw material, the pulpifying lasts for 2-4 hours at the temperature of 80-100 DEG C; the oxygen pressure acid leaching lasts for 2-4 hours at the temperature of 90-180 DEG C at the pressure of 0.1-3 MPa at the speed of 100-3000 r/min; an arsenic containing leaching agent is reduced and separated through sulfur dioxide, sodium thiosulfate or sulfite, and is then secondarily pulpified and separated to obtain a sulfite product. The arsenic content in a leaching residue is less than 5%, the recovery rate of arsenic is more than 80%; a surfactant is added in the pulpifying process, so that the oxidation reaction is more thorough; a vacuum pulpifying tankprovided with an exhaust system is used to prevent the waste gas from overflowing, and is beneficial for improving the operation environment. The technological process is short, and the treatment process has the advantages of environmental protection, economical efficiency, energy saving, and efficient utilization of resources, etc.

Description

technical field [0001] The invention relates to a treatment process for materials containing arsenic sulfide, specifically belonging to the technical field of metallurgy. Background technique [0002] Arsenic is a highly toxic and carcinogenic element, enriched in copper, lead, zinc, nickel, cobalt, gold and silver and other non-ferrous metal ores. During the smelting process, arsenic mainly enters the flue gas and dust in the form of oxides. In the washing process, the arsenic is discharged along with the waste acid. Smelters generally use sulfuration process to treat waste acid, so that arsenic will eventually enter the arsenic-containing filter cake. [0003] At present, there are mainly two methods for processing arsenic-containing filter cakes, one is fire separation, and the other is wet separation. Fire production mainly uses the roasting method. The arsenic trioxide produced by oxidation and roasting of arsenic sulfide directly volatilizes into the flue gas, and is...

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): C22B30/04C22B7/00C22B19/20C22B15/00
CPCC22B7/007C22B15/0071C22B15/0089C22B19/22C22B19/26C22B30/04Y02P10/20
Inventor 曹霞郭晴陈志刚郭凯
Owner CHINA NERIN ENG
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