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

Method for roasting pyrite in sulfuric acid production

A technology for sulfuric acid production and pyrite, applied in chemical instruments and methods, sulfur compounds, inorganic chemistry, etc., can solve problems such as high cost

Inactive Publication Date: 2009-11-25
周超 +1
View PDF0 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this process is expensive

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
  • Method for roasting pyrite in sulfuric acid production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] In the following instructions, you can also use the attached figure 1 To understand the general and preferred embodiments of the invention.

[0030] A design concept of the present invention is to obtain as much iron tetroxide as possible in the roasting stage of pyrite, and to ensure that the elemental sulfur produced in the fluidized furnace is completely oxidized into sulfur dioxide, so as to overcome the problems in the prior art. Technical problems that have long been desired to be solved but cannot be solved.

[0031] For this reason, one of the means that the contriver takes is, on the one hand, controls the oxygen supply of fluidized furnace, roasts pyrite in fluidized furnace at a higher first temperature, so that incomplete oxidation product Fe is obtained in slag. 3 o 4 , on the other hand, add at least one air supply link in the flow path after the fluidized furnace, and carry out secondary or multiple oxidations to the furnace gas (containing sulfur dioxi...

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 relates to a method for roasting pyrite in sulfuric acid production, comprising: (1) roasting pyrite in a boiling furnace; (2) reclaiming afterheat of a part of slag and reducing temperature of slag in a waste heat boiler; (3) dedusting in a dust catcher and removing the roasted slag. A first air supply and / or a secondary air supply is / are carried out for the boiling furnace, roasting is started at a first temperature between 850-950 DEG.. A third air supply is carried out for downstream of the boiling furnace at the temperature between 500-750 DEG. to oxidize sublimed sulfur generated in the boiling furnace.

Description

technical field [0001] The present invention relates to the production method of sulfuric acid, more particularly relates to the method for roasting pyrite in sulfuric acid production. Background technique [0002] Pyrite is the general term for iron sulfide minerals, including ordinary pyrite, magnetite, coal-bearing pyrite, high-arsenic and high-fluorine pyrite, high-lead-zinc pyrite and high-carbonate pyrite, etc. . The main component of ordinary pyrite is FeS 2 . In China, the main raw material for the production of sulfuric acid is pyrite. [0003] Such as figure 1 As shown, in a common implementation of the pyrite roasting stage of sulfuric acid production, pyrite is given from the storage hopper 1, and is metered and transported to the star feeder 3 through a belt scale, and then enters the fluidized bed furnace 4 for roasting , and discharge the first part of the slag from the bottom of the fluidized furnace, wherein the first air supply (from the bottom of the ...

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): C01B17/74C22B1/10
CPCY02P20/129
Inventor 冯世凯周超
Owner 周超
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