Method by utilizing sulfuric-acid residue to produce iron concentrates

A technology of sulfuric acid slag and iron fine powder, which is applied in the direction of solid separation and flotation, which can solve the problems of high material requirements for production equipment, low grade improvement of sulfuric acid slag, and difficulty in obtaining sorting effects, etc., and achieves low cost and small investment , High recovery effect

Active Publication Date: 2013-06-05
KUNMING CHUAN JINNUO CHEM IND
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the sulfuric acid slag is roasted at high temperature, the magnetite and gangue in the slag mostly exist in the form of conjoined bodies, so it is difficult to obtain the ideal separation effect by conventional methods.
The technical scheme disclosed in the Chinese patent (200510093037) "Method for Flotating Iron Concentrates from Sulfuric Acid Slag" published on February 8, 2006 is to "separate the sulfides and gangues" first, but after being treated by this method, the sulfuric acid The slag grade is not high, only part of sulfide and gangue can be removed, and other harmful elements such as arsenic, copper and phosphorus cannot be removed
Extensive use of acidic media requires high material requirements for production equipment, large investment, and does not consider the treatment of harmful elements such as arsenic and copper.

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 by utilizing sulfuric-acid residue to produce iron concentrates

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Grinding-pickling-activation, dispersion-flotation processes are used to remove harmful elements in sulfuric acid slag. First, 1 ton of sulfuric acid slag is put into wet grinding equipment for grinding treatment. The grinding concentration is 60-75%, and the particle size is ground to 90. % through a 200 mesh sieve; add 98% concentrated sulfuric acid in an amount of 7.0kg / t, and pickle with stirring for 20 minutes; add copper sulfate in an amount of 500g / t as an activator, and add sodium carbonate in an amount of 200g / t as a Dispersant, then add pine oil in an amount of 50g / t as a foaming agent, and finally add butyl xanthate in an amount of 350g / t as a collector, and stir for 2 minutes each time the agent is added; the sulfuric acid slag added with the agent Send it to the flotation machine, the flotation concentration is 20-30%, and the flotation time is 30 minutes. After the harmful elements of arsenic and sulfur are flotation, the iron concentrate powder with an iro...

Embodiment 2

[0029] Grinding-pickling-activation, dispersion-flotation processes are used to remove harmful elements in sulfuric acid slag. First, 1 ton of sulfuric acid slag is put into wet grinding equipment for grinding treatment. The grinding concentration is 60-75%, and the particle size is ground to 90. % pass through a 200 mesh sieve; add 98% concentrated sulfuric acid at 7.5kg / t, and pickle with stirring for 30 minutes; add copper sulfate at 550g / t as an activator, and add starch at 280g / t as a dispersion Add kerosene as a foaming agent in an amount of 50g / t, and finally add dixanthate in an amount of 400g / t as a collector, and stir for 5 minutes each time the agent is added; send the sulfuric acid slag with the agent into Flotation machine, the flotation concentration is 20-30%, and the flotation time is 45 minutes. After flotation to remove harmful elements such as arsenic and sulfur, iron concentrate powder with an iron grade of 61.59% is produced, and the recovery rate is over 8...

Embodiment 3

[0031] Grinding-pickling-activation, dispersion-flotation processes are used to remove harmful elements in sulfuric acid slag. First, 1 ton of sulfuric acid slag is put into wet grinding equipment for grinding treatment. The grinding concentration is 60-75%, and the particle size is ground to 90. % through 200 mesh sieve; add 98% concentrated sulfuric acid at 8.0kg / t, and pickle with stirring for 25 minutes; add copper sulfate at 600g / t as an activator; add sodium humate at 250g / t As a dispersant; then add No. 2 oil in an amount of 90g / t as a foaming agent; finally add amylxanthate in an amount of 450g / t as a collector, and stir for 3 minutes each time the agent is added; The sulfuric acid slag is sent to the flotation machine, the flotation concentration is 20-30%, and the flotation time is 35 minutes. After the harmful elements of arsenic and sulfur are flotation, iron concentrate powder with an iron grade of 61.99% is produced, and the recovery rate is over 80%. .

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 method by utilizing sulfuric-acid residue to produce iron concentrates, which is characterized in that: techniques such as milling grinding, acid cleaning, activation, dispersion and floatation are adopted to remove harmful elements in the sulfuric-acid residue, the grade of iron is improved and the iron concentrates are obtained. The method concretely comprises the following working flows: the sulfuric-acid residue is put in wet grinding equipment for milling grinding, the granularity of the sulfuric-acid residue is ground to that 90 percent of the sulfuric-acid residue can pass through a 200-mesh sieve, and the milling grinding concentration is 60 to 75 percent; the sulfuric-acid residue after being ground is cleaned with 98% concentrated sulfuric acid, consumed volume of the sulfuric acid is 7.0 to 85kg / t, and the sulfuric-acid residue is mixed for 20 to 30 minutes; activating agent with the volume of 500 to 700g / t is added, and dispersant with volume of 200 to 300g / t is added to be mixed for 2 to 5 minutes; foamer with the volume of 50 to 100 g / t is added to be mixed for 2 to 5 minutes; 350 to 500g / t of xanthate collector is added to be mixed for 2 to5 minutes; the sulfuric-acid residue which is mixed with chemicals is delivered to a floatation machine, the floatation concentration is 20 to 30 percent, the floatation time is 30 to 45 minutes, andthen the iron concentrates can be produced. Compared with the process flow of the chemical method, the method is simpler and more convenient, and the sulfuric-acid residue with iron content being less than 55 percent can be processed.

Description

technical field [0001] The invention belongs to the technical field of iron fine powder production, and in particular relates to a method for producing iron fine powder by utilizing sulfuric acid slag, in particular to a method for producing iron fine powder by utilizing sulfuric acid slag by combining a chemical method and a flotation method. Background technique [0002] In the prior art, the method for producing iron concentrate powder from sulfuric acid slag generally adopts re-roasting-magnetic separation-gravity separation process, or magnetic separation-gravity separation combined-flotation and other technological processes for separation. However, after the sulfuric acid slag is roasted at high temperature, the magnetite and gangue in the slag mostly exist in the form of conjoined bodies, so it is difficult to obtain an ideal separation effect by conventional methods. The technical scheme disclosed in the Chinese patent (200510093037) "Method for Flotating Iron Conce...

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): B03D1/00B03D1/004B03D101/02B03D101/04
Inventor 杨兴曾润国魏家贵刘甍
Owner KUNMING CHUAN JINNUO CHEM IND
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