A method for synergistic resource treatment of lead-zinc smelting slag and alum slag

A technology for smelting slag and jarosite slag is applied in the field of co-resource processing of lead-zinc smelting slag and jarosite slag, and can solve the problems of dangerous solid waste storage of jarosite slag, high energy consumption in the treatment process, and difficulty in disposal of kiln slag. , to achieve the effect of eliminating SO2 pollution, simple operation and mild process conditions

Active Publication Date: 2021-04-27
CENT SOUTH UNIV
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of high energy consumption, serious environmental pollution, difficult disposal of kiln slag and dangerous solid waste accumulation of alum slag in the existing traditional pyroprocessing process of lead-zinc smelting slag; the purpose of the present invention is to provide a Alum slag is used as a roasting additive for lead-zinc smelting slag, using the sulfur resources of the slag to selectively convert lead and zinc in the slag and slag into sulfides, and at the same time reduce the iron compounds in the slag to metallic iron , so that it is easy to realize the method of separation and recovery of lead, zinc and iron through conventional flotation and magnetic separation. This method not only separates and recovers valuable metals such as lead, zinc, and iron, but also the tailings can be directly used as building materials. Converted to metal sulfides and efficiently immobilized, avoiding SO 2 The overflow of gas, thus realizing the clean disposal of alumina slag and the comprehensive recovery of resources of lead-zinc smelting slag

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
  • A method for synergistic resource treatment of lead-zinc smelting slag and alum slag
  • A method for synergistic resource treatment of lead-zinc smelting slag and alum slag
  • A method for synergistic resource treatment of lead-zinc smelting slag and alum slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The iron-vanadium slag used in this embodiment is the jarosite slag produced by a certain zinc smelter in Chenzhou, and its specific components are shown in Table 1.

[0035] The main chemical composition / % of table 1 jarosite slag

[0036]

[0037] The zinc smelting slag used in this example is zinc smelting low-acid leaching slag, and its specific composition is shown in Table 2. 86% of the zinc in the zinc leaching slag exists in the form of zinc ferrite.

[0038] Table 2 Main chemical composition / % of zinc leaching slag

[0039]

[0040] A method for synergistically self-sulfiding roasting of auxinite slag and lead-zinc smelting slag, the specific steps are as follows:

[0041] (1) above-mentioned jarosite slag, zinc leach slag and the coke that particle size is 80% less than 5mm are mixed with mass ratio as 100:60:20;

[0042] (2) Take 150 kg of the above-mentioned mixed sample and place it in a self-made rotary kiln, pass nitrogen gas as a protective gas, ...

Embodiment 2

[0060] The vulcanizing agent used in this example is jarosite slag produced by a zinc smelter in Zhuzhou, and its specific chemical composition is shown in Table 5.

[0061] The main chemical composition / % of table 5 jarosite slag

[0062]

[0063] The steel mill zinc-containing smoke and dust used in this embodiment is the blast furnace dust produced by a certain steelmaking plant in Hunan. The particle size of the material is 75% less than 0.074mm. It exists with zinc ferrite, and iron exists in the form of ferric oxide, ferric silicate and ferric oxide.

[0064] Table 6 Main chemical components of soot from steel mills / %

[0065]

[0066] A method for synergistically self-sulfiding roasting of auxinite slag and lead-zinc smelting slag, the specific steps are as follows:

[0067] (1) above-mentioned jarosite slag, zinc leach slag and the coke that particle size is 80% less than 5mm are mixed with mass ratio as 100:75:40;

[0068] (2) Take 150 kg of the above-mention...

Embodiment 3

[0086] The jarosite slag and zinc ferrite slag used in this embodiment have specific chemical compositions shown in Table 5 and Table 2, respectively.

[0087] A method for synergistically self-sulfiding roasting of auxinite slag and lead-zinc smelting slag, the specific steps are as follows:

[0088] (1) above-mentioned jarosite slag, zinc leach slag and the coke that particle size is 80% less than 5mm are mixed with mass ratio as 100:80:40;

[0089] (2) Take 150 kg of the above-mentioned mixed sample and place it in a self-made rotary kiln, pass nitrogen gas as a protective gas, and roast at 1000 ° C for 120 min.

[0090] (3) Slowly cool and crystallize the calcined product at a cooling rate of 5°C / min, and cool down to room temperature naturally after dropping to 500°C.

[0091] (4) Sampling and analyzing the content of lead, zinc sulfide and iron in the roasted sample, and calculating the sulfur fixation rate, the sulfurization rate of lead and zinc and the reduction rate...

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
crystal sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a method for synergistic resource treatment of lead-zinc smelting slag and jarosite slag. The method is to mix lead-zinc smelting slag, jarosite slag and carbonaceous reducing agent into balls, roast the balls, and roast and melt The body undergoes slow cooling and crystallization to obtain roasted products containing metallic iron and lead-zinc sulfides; the roasted products undergo flotation to recover lead-zinc sulfide concentrates, and the flotation tailings undergo magnetic separation to recover iron concentrates. In this method, the co-processing of the jarosite slag and the lead-zinc smelting slag not only realizes the efficient fixation of sulfur in the jarosite slag, but also avoids SO 2 The gas overflows, and at the same time, the lead and zinc in the waste slag are sulfurized into heavy metal sulfides, and the iron is reduced to metallic iron, so that lead-zinc sulfides and iron can be separated and recovered by conventional flotation and magnetic separation methods; this method has mild process conditions , environmental protection, simple operation, low cost and other advantages, can solve the problem of environmental pollution caused by the prior art on the treatment of alum slag and lead-zinc smelting slag.

Description

technical field [0001] The invention relates to a method for synergistic treatment of lead-zinc smelting slag and jarosite slag, in particular to a method for using jarosite slag as a roasting additive for lead-zinc smelting slag, and selectively separating the lead-zinc and iron compounds in the two smelting slags. It is converted into lead-zinc sulfide and metal iron, so that lead-zinc and metal iron can be separated and recovered by conventional flotation and magnetic separation methods, and belongs to the technical field of non-ferrous metal beneficiation and metallurgy. Background technique [0002] my country is a major producer and consumer of lead and zinc. In 2015, the output of lead and zinc in my country was 3.989 million tons and 6.217 million tons respectively, accounting for more than 40% of the world's total output. At present, my country's hydro-smelting zinc production capacity accounts for about 85% of the national annual zinc production capacity. The hydro...

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): C22B7/04C22B1/248C22B1/02C22B1/26C21B13/00C22B13/02C22B19/30
CPCC22B1/02C22B1/2406C22B1/248C22B1/26C22B7/001C22B7/002C22B7/04C22B13/025C22B19/30Y02P10/20
Inventor 韩俊伟刘维覃文庆张添富杨聪人焦芬邬桂婷
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