Arsenic-alkali slag treatment method and device

A treatment method and technology for arsenic-alkali slag, applied in the direction of improving process efficiency, can solve problems such as injury to the operator's body, secondary pollution, and contamination of the site, and achieve the effects of improving leaching efficiency, reducing separation costs, and reducing arsenic content

Active Publication Date: 2016-08-24
锡矿山闪星锑业有限责任公司
View PDF4 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] There are many patent documents reporting on the treatment technology of arsenic-alkali slag, all of which are searched for the treatment technology, and none of them involve the pollution-free control technology of the treatment process
CN100402680C discloses a technology for processing arsenic-alkali slag. Its shortcoming is that effective measures are not taken to solve the dust problem in the crushing process of arsenic-alkali slag, which easily causes secondary pollution
The CN102382989A discloses that arsenic-alkali slag is treated by crushing, ball milling, and hot water leaching to remove arsenic. Although this process can achieve the purpose of arsenic removal, the process uses dry crushing and dry ball milling for arsenic-alkali slag, which causes highly toxic arsenic-alkali slag to fly. In the field, it not only pollutes the site, but also harms the body of the operator; at the same time, the particle size of the arsenic-alkali slag cannot meet the particle size requirements due to dry crushing and dry grinding. Therefore, it takes longer time and higher temperature for leaching, and the leaching effect is not good; At the same time, in order to achieve a higher arsenic removal rate, it is necessary to add arsenic removal agent to achieve the purpose of arsenic removal

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
  • Arsenic-alkali slag treatment method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Weigh 5.0t of arsenic-alkali slag (Sb 5.01 wt%, As 1.02 wt%, total alkalinity 69.15%), turn on the feeder to evenly feed the material to the crusher, and then spray water to the hammer crusher inlet Water, control water spray volume 2.50m 3 (When crushing, spray water according to 0.5 tons of water / ton of arsenic-alkali slag), and crush to a particle size of ≤3mm; (2) The crushed material flows into the leaching tank, and 7.50m of water is added 3 (For the first leaching, add water at the rate of 1.5 tons of water / ton of arsenic-alkali slag), add 10.0kg of sodium chlorate at the same time, leaching temperature is 40-45°C, leaching time is 0.5h, and the stirring speed is 80 r / min for the first leaching; After leaching, filter with a plate and frame filter (filtering temperature is 40-45°C, pressure is 0.2-0.4Mpa) to obtain a leaching solution of 9.38m 3 (of which, Sb 0.81g / L, As 4.62g / L), the slag from primary leaching, converted into a dry weight of 1.44t (of which...

Embodiment 2

[0038] (1) Weigh 5.0t of arsenic-alkali slag (Sb 10.56 wt%, As 8.49 wt%, total alkalinity 53.49%), turn on the feeder to evenly feed the material to the crusher, and then spray water to the jaw crusher inlet Water, control water spray volume 4.0m 3 (When crushing, spray water according to 0.8 tons of water / ton of arsenic-alkali slag), and crush to a particle size of ≤3mm; (2) The crushed material flows into the leaching tank, supplemented with 10.0m of water 3 (For primary leaching, add water at the rate of 2.0 tons of water / ton of arsenic-alkali slag; among them, 9.65 m 3 Be the secondary leachate in embodiment 1, 0.35 m 3 tap water), and at the same time add 2.5kg of hydrogen peroxide (concentration 27.5wt%), leaching temperature 50-55°C, leaching time 0.8h, stirring speed 85 r / min for the first leaching; after leaching, use a plate and frame filter Filtration (filter temperature: 45-50°C, pressure: 0.2-0.4Mpa) to obtain primary leachate 12.83m 3 (of which, Sb 1.63g / L, As...

Embodiment 3

[0040] (1) Weigh 5.0t of arsenic-alkali slag (Sb 25.13 wt%, As 12.59 wt%, total alkalinity 35.19%), turn on the feeder to evenly feed the material to the crusher, and then spray water to the entrance of the hammer crusher Water, control water spray volume 5.0m 3 (When crushing, spray water according to 1.0 tons of water / ton of arsenic-alkali slag), crush to a particle size of ≤3mm; (2) The crushed material flows into the leaching tank, supplemented with 11.0m of water 3 (For primary leaching, add water at the rate of 2.2 tons of water / ton of arsenic-alkali slag; among them, 10.28 m 3 Be the secondary leachate in embodiment 2, 0.72 m 3 tap water), and at the same time add 2.5kg of chlorine gas, the leaching temperature is 60-65°C, the leaching time is 1.0h, and the stirring speed is 90 r / min for the first leaching; after leaching, filter with a plate and frame filter (filtering temperature is 45 ~50℃, pressure is 0.2~0.4Mpa), and the primary leachate is 14.33m 3 (Among them,...

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

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
Login to view more

Abstract

A method and device for treating arsenic-alkali slag. The method is to wet crush arsenic-alkali slag, add an oxidizing agent to perform the first leaching, and filter and separate to obtain the first leaching slag and the first leaching solution, and the first leaching slag Ball milling is carried out after pulping, adding an oxidizing agent after ball milling to perform second leaching and then filtering to obtain second leaching residue and second leaching solution. The present invention also includes an arsenic-alkali slag treatment device, which includes a water spray device, a crusher, a primary leaching unit, a primary leaching filter, a pulping unit, a grinding unit, a secondary leaching unit and a secondary leaching filter. The method and device of the present invention can achieve crushing and ball milling without raising dust, can minimize the pollution of harmful dust to the operating environment and the atmospheric environment, and can ensure >97.00% arsenic removal rate and >95.00% antimony incorporation while protecting the environment. The slag rate, crushing, ball milling and leaching are organically combined, not easy to block, and the process is smooth.

Description

technical field [0001] The invention relates to a treatment method and device for antimony smelting waste residue, in particular to a treatment method and device for arsenic-alkali residue. Background technique [0002] Antimony is one of the top ten non-ferrous metals, occupies a very important position in the national economy, and has been widely used in transportation, chemical and military industries and other sectors. [0003] At present, 95% of antimony smelting production process adopts pyrometallurgical process. The pyrochemical antimony smelting process removes impurities and arsenic to produce toxic slag—arsenic-alkali slag, whose main components are arsenic, antimony, and alkali. The purpose of treating antimony smelting arsenic-alkali slag is to eliminate the hidden danger of arsenic-alkali slag polluting the environment. [0004] The existing treatment methods for arsenic-alkali slag are mainly wet treatment. During the treatment process, the arsenic-alkali sl...

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 Patents(China)
IPC IPC(8): C22B7/04C22B30/02C22B30/04
CPCY02P10/20
Inventor 廖佳乐戴永俊单桃云廖光荣刘鹊鸣刘放云金承永欧阳慧
Owner 锡矿山闪星锑业有限责任公司
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