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

Method for recycling sulfur-iron resources

A technology for recovering sulfur and resources, which is applied in chemical instruments and methods, sulfur compounds, solid waste removal, etc. It can solve the problems of complex operation and high requirements for reaction conditions, and achieve simple process, high utilization value and short production cycle. Effect

Inactive Publication Date: 2013-09-25
SICHUAN UNIV
View PDF11 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The application number is 201110262635.5, a method for recycling sulfur and iron resources by reducing and decomposing titanium dioxide waste slag green vitriol by sulfur reduction and decomposing titanium dioxide waste slag green vitriol. Complicated, and only solves the recovery of sulfur and iron resources in titanium dioxide waste slag green vitriol

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1 adopts the method of the present invention to recover sulfur iron resource

[0030] a, ferric sulfate raw material and pyrite are mixed uniformly at a molar ratio of 2:1 to obtain a mixed material;

[0031] b. Calcining the mixed material at a temperature of 800°C for 2 hours in a nitrogen atmosphere; the produced SO 2 The tail gas is made of sulfuric acid by two-turn-two-suction process, and the obtained solid slag can replace lime to directly neutralize waste titanium dioxide acid and acid waste gas, or be used as a raw material for steelmaking plants and the production of iron oxide pigments.

[0032] Among them, the ferric sulfate raw material is first dried at a temperature of 300°C for 30 minutes under a nitrogen and argon atmosphere to remove the crystal water in the ferric sulfate, so that the moisture content in the ferric sulfate raw material is 1wt%; the moisture content of pyrite is 1wt%.

[0033] It has been determined that the decomposition r...

Embodiment 2

[0034] Embodiment 2 adopts the method of the present invention to recover sulfur iron resource

[0035] A, ferric sulfate raw material and pyrite are mixed evenly in molar ratio 1.6:1, obtain mixed material;

[0036] b. Calcining the mixed material at a temperature of 750° C. for 0.1 h in an atmosphere of nitrogen and sulfur dioxide. produced SO 2 The tail gas is made of sulfuric acid by two-turn-two-suction process, and the obtained solid slag can replace lime to directly neutralize waste titanium dioxide acid and acid waste gas, or be used as a raw material for steelmaking plants and the production of iron oxide pigments.

[0037] Among them, the ferric sulfate raw material is first dried at a temperature of 400°C for 60 minutes under a nitrogen atmosphere to remove the crystal water in the ferric sulfate, so that the moisture content in the ferric sulfate raw material is 0.1wt%; the moisture content of the pyrite is 1wt%.

[0038] It has been determined that the decomposi...

Embodiment 3

[0039] Embodiment 3 adopts the method of the present invention to recover sulfur iron resource

[0040] A, ferric sulfate raw material and pyrite are mixed evenly in molar ratio 1.8:1, obtain mixed material;

[0041] b. Calcining the mixed material at a temperature of 700° C. for 1 hour in an atmosphere of nitrogen and sulfur dioxide. produced SO 2 The tail gas is made of sulfuric acid by two-turn-two-suction process, and the obtained solid slag can replace lime to directly neutralize waste titanium dioxide acid and acid waste gas, or be used as a raw material for steelmaking plants and the production of iron oxide pigments.

[0042] Among them, the ferric sulfate raw material is first dried at a temperature of 180°C for 60 minutes under an argon atmosphere to remove the crystal water in the ferric sulfate, so that the moisture content in the ferric sulfate raw material is 8wt%; the moisture content of pyrite is 1wt%.

[0043] It has been determined that the decomposition ra...

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
decomposition efficiencyaaaaaaaaaa
decomposition efficiencyaaaaaaaaaa
decomposition efficiencyaaaaaaaaaa
Login to View More

Abstract

The technical problem to be solved in the invention is to provide a method for recycling sulfur-iron resources. The method for recycling sulfur-iron resources comprises the following steps of: a, mixing a ferric sulfate material with a reducing agent in a molar ratio of (0.6-2.0):1 to obtain a material mixture; and b, roasting the material mixture for 0.1 hour-2hours at 300 DEG C-800 DEG C to obtain sulfur dioxide and solid slag. The sulfur dioxide obtained reaction in the invention can be used for preparing sulfuric acid by adopting a two-stage transition and two-stage absorption process; the solid slag can be used for substituting lime to directly neutralize and treat titanium white waste acid and acid waste gas, or can be used as a material of steel works and iron oxide pigment production, so that industrial wastes including titanium white waste slag iron vitriol, pyrite slag, steel leaching liquor and the like can be greatly absorbed. Meanwhile, the method for recycling sulfur-iron sources has the advantages of being simple in process, high in recovery rate, high in product purity and the like.

Description

technical field [0001] The invention relates to a method for recovering sulfur and iron resources, and belongs to the technical field of three wastes treatment and comprehensive utilization. Background technique [0002] Sources of ferric sulfate include titanium dioxide waste slag vitriol, pyrite slag and iron and steel leaching liquor. Many of these sources are industrial waste. At present, some of these industrial wastes are piled up by dams, which not only occupy land, but also cause environmental pollution, and some are sold as low-grade industrial raw materials, with low product value and low profit. At the same time, most of the ferric sulfate produced from these sources is made into polyferric sulfate, coagulant, and analytical reagent. Due to the small market capacity, it is difficult to consume a large amount of ferric sulfate. [0003] According to the prediction of China Chemical Mining Association, my country will need 17.2 million tons of sulfur in 2015 and 2...

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): C01B17/50B09B3/00
Inventor 杨林黄鹏辉张志业王辛龙杨秀山孔行健
Owner SICHUAN UNIV
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