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

Dephosphorization method of phosphorus-containing iron ore

A technology for iron ore and dephosphorization, applied in the direction of improving process efficiency, can solve problems such as poor dephosphorization effect, and achieve the effect of low dephosphorization cost and good dephosphorization effect

Inactive Publication Date: 2007-09-19
CENT SOUTH UNIV
View PDF0 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the dephosphorization effect of this method is relatively poor, and the dephosphorization rate only reaches about 42% under the synergistic effect of the phosphorus-dissolving agent.

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
  • Dephosphorization method of phosphorus-containing iron ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1, referring to the accompanying drawings, the phosphorus-containing iron ore of 1.12% is crushed to a particle size of less than 0.074mm, and 10% of pyrite with a particle size of less than 0.074mm is added to the phosphorus-containing iron ore by mass percentage. The 9K culture medium solution adjusts the mass concentration of the pulp to 10%, and adds 5% of Thiobacillus ferrooxidans (T.f bacteria) bacteria solution according to the mass percentage. The initial pH of the pulp is 2.2. Under the condition of leaching for 35 days, the dephosphorization rate reaches 68.81%. ; When the pyrite content increased to 20%, the dephosphorization rate was 78.84%.

Embodiment 2

[0014] Embodiment 2, referring to the accompanying drawings, the phosphorus-containing iron ore of 1.12% is crushed to a particle size of less than 0.074mm, and 20% of pyrite with a particle size of less than 0.074mm is added to the phosphorus-containing iron ore by mass percentage. 9K medium solution adjusts the mass concentration of the pulp to 15%, and adds 5% T.f bacteria liquid according to the mass percentage. When the initial pulp pH is 1.7 and 2.0, the dephosphorization rate reaches 86.68% and 86.63 respectively under the condition of leaching for 45 days. %; when the pH is lower than 1.5, it is difficult for bacteria to survive; when the pH is 3.5, the dephosphorization rate drops to 78%.

Embodiment 3

[0015] Embodiment 3, referring to the accompanying drawings, the phosphorus-containing iron ore of 1.12% is crushed to a particle size of less than 0.074mm, and 20% of the pyrite with a particle size of less than 0.074mm is added to the phosphorus-containing iron ore by mass percentage. 9K culture medium solution adjusts the pulp mass concentration to 20%, the initial pulp pH is 2.2, and under the conditions of leaching for 45 days, when the inoculation amount of T.f bacteria solution increases from 2% to 5% by mass percentage, the dephosphorization rate increases from 67.70 % increased to 78.84%; and when the inoculation amount of T.f bacteria solution increased from 5% to 10%, the ore dephosphorization rate only increased from 78.84% to 79.95%.

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

A method for dephosphorizing from phosphor-containing iron ore is disclosed, wherein phosphor-containing iron ore is broken to the granularity of less than 0.074mm and mixed with iron pyrite prebroken to the granularity of less than 0.074mm based on mass percent of 5%-20%, the mass concentration of ore slurry is adjusted to 10%-20% by the aphosphorosis 9K culture and pH of original ore slurry is in the range of 1.5 to 3.5, then noculating ferrous and sulfur oxide bacilli lysate of 2% -10% mass percent in which bacteria is cultrued by 9K culture beforehand ro reach exponential phase of growth in ore slurry, extracting dephosphorization, solid-liquid separation after 30 -45 days, and the solid is iron ore concentrate. The invention is suitable for direct-extracting dephosphorizing from each phosphor-containing iron ore microbe, the ore dephosphorizing yield can be exceeded 80%, The content of phosphorus satisfies the requirement of blast furnace ironmaking materials, and having comprehensive utilization of iron pyrite. The process provides a reliable technical support for developing rich high phosphorus iron ore in our country with low cost and good dephosphorization.

Description

technical field [0001] The invention relates to a method for dephosphorizing iron ore containing phosphorus, in particular to a method for directly leaching iron ore containing phosphorus for dephosphorization by using Thiobacillus ferrooxidans (T.f bacteria). Background technique [0002] With the development of the iron and steel industry, my country's limited rich ore and easy-to-select iron ore resources have been gradually exhausted, and the available iron ore resources are increasingly poor, fine and miscellaneous. In my country's Hunan, Hubei, and the Yangtze River Basin, a large amount of phosphorus-containing iron ore is stored. Low phosphorus content is an important quality indicator for iron ore, as phosphorus can cause "cold brittleness" in steel. Cleveland Cleffs Inc proposed that the phosphorus content of iron concentrate should be less than 0.024%, while the domestic basic requirement for iron concentrate phosphorus content is 0.05%-0.30%, and it is becoming ...

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): C22B3/18C22B1/14
CPCY02P10/20
Inventor 姜涛邱冠周杨永斌李光辉李骞郭宇峰金勇士范晓慧黄柱成许斌朱忠平张元波刘牡丹董海刚
Owner CENT SOUTH 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