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

Method for gradient recovery of pyrite minerals from copper separation tailings

A technology for selecting copper tailings and recovering sulfur. It is used in recycling technology, mechanical material recovery, solid separation, etc. It can solve the problems of medium consumption, the inability of heavy medium to reduce medium consumption, and the high medium consumption.

Pending Publication Date: 2021-09-10
安徽铜冠产业技术研究院有限责任公司
View PDF12 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

due to Ti 4+ , Mg 2+ , Mn 2+ Many cations have an ionic radius similar to that of iron ions, so some iron ions in some magnetite are replaced by these ions, resulting in a decrease in the magnetism of the magnetite powder, which eventually leads to a large consumption of the medium
At the same time, in recent years, with the widespread use of non-pressure feeding three-product dense medium cyclones, especially for sorting non-delimed raw coal, it is required that the magnetite powder must meet the fourth category standard, and at the same time, the magnetic substance content is not less than 95 %, the content of S in impurities is not more than 2%, otherwise, the medium consumption will be high
The dense media obtained by the two methods disclosed above are far from achieving the effect of reducing media consumption

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 gradient recovery of pyrite minerals from copper separation tailings
  • Method for gradient recovery of pyrite minerals from copper separation tailings
  • Method for gradient recovery of pyrite minerals from copper separation tailings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1, the copper beneficiation tailings used were taken from a copper ore dressing plant in Anhui. The results of sulfur phase analysis of the copper beneficiation tailings are shown in Table 1, and the results of iron phase analysis are shown in Table 2.

[0025] Table 1 Sulfur phase analysis results of copper beneficiation tailings

[0026] Sulfur phase magnetic sulfide sulfur non-magnetic sulfide sulfur total Sulfur content / % 1.19 0.11 1.30 Occupancy / % 91.54 8.46 100.00

[0027] Table 2 Analysis results of iron phase of copper beneficiation tailings

[0028]

[0029]

[0030] It can be seen from the pyrite phase analysis of the copper dressing tailings that the copper dressing tailings contain some magnetic pyrite minerals, the sulfur content of the magnetic sulfide is 1.19%, the sulfur content of the non-magnetic sulfide is 0.11%; the TFe content is 32.42%.

[0031] A method for gradient recovery of pyrite minerals fr...

Embodiment 2

[0048] Example 2, compared with Example 1, the difference is that the magnetic field strength of weak magnetic roughing in S1 is 2200Gs, the magnetic field strength of weak magnetic separation is 2000Gs, and the grinding fineness is controlled at -0.074mm, accounting for 75%; S4 The strength of the medium magnetic field is 3000Gs, and the fineness of regrinding should be controlled at -0.045mm, accounting for 85%. The fine-grained low-sulfur iron concentrate obtained in Example 2 is used as a dense medium in coal preparation and coal washing, and its contained Ti 4+ ,Mg 2+ ,Mn 2+ The grade is relatively lower and the dielectric loss is also lower.

[0049] Table 5 embodiment 2 test scheme iron sulfur resource data are as follows:

[0050]

[0051] Table 6 embodiment 2 test scheme is easy to replace the ion data of iron ion as follows:

[0052]

Embodiment 3

[0053] Embodiment 3, compared with embodiment 1, its difference is that in S3, once rough selection butyl xanthate consumption is 30g / t, 2# oil consumption 4g / t; Secondary and three times rough selection butyl xanthate consumption is 10g / t , the dosage of 2# oil is 2g / t; the dosage of selected Dinghuang is 10g / t. The fine-grained low-sulfur iron concentrate obtained in Example 3 has lower sulfur grade and lower dielectric loss in coal washing.

[0054] Table 5 embodiment 3 test scheme iron sulfur resource data are as follows:

[0055]

[0056] Table 6 embodiment 3 test scheme is easy to replace the ion data of iron ion as follows:

[0057]

[0058] The present invention proposes a method for gradient recovery of pyrite minerals from copper beneficiation tailings. In the method, coarse-grained low-sulfur iron concentrates are first obtained from copper beneficiation tailings through weak magnetic separation and flotation desulfurization, and then the desulfurization foam...

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
Magnetic field strengthaaaaaaaaaa
Magnetic field strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for gradient recovery of pyrite minerals from copper separation tailings. The method comprises the following steps that S1, weak magnetic separation iron separation is conducted on copper separation tailings; S2, flotation desulfurization is conducted on the weak magnetic concentration concentrate; S3, reinforced flotation is conducted on desulfurization foam; and S4, regrinding and strong magnetic separation are conducted on desulfurization foam flotation tailings. According to the method, the copper separation tailings are subjected to weak magnetic roughing, weak magnetic roughing concentrate grinding, weak magnetic concentration and weak magnetic concentration concentrate flotation desulfurization, and various classified products are obtained; and obtained fine-grade magnetite powder with the sulfur content lower than 2% and the magnetic matter content larger than 95% for coal dressing is applied to magnetite powder for a dense medium cyclone and a bevel wheel (or vertical wheel) dense medium separator and the like with the higher fineness requirement, the grades of Ti4+, Mg2+ and Mn2+ are obviously reduced, the magnetism of the magnetite powder can be effectively prevented from being reduced, the property stability of prepared suspension liquid is improved, medium consumption in the production process is reduced, and the cost of the coal dressing process is reduced.

Description

technical field [0001] The invention relates to the technical field of beneficiation engineering for recovering pyrite minerals, in particular to a method for gradient recovery of pyrite minerals from copper beneficiation tailings. Background technique [0002] With the rapid development of social economy, the consumption of copper metal in my country has increased rapidly, and the output of copper has ranked first in the world for many years. It will contain considerable sulfur iron resources with high economic recovery value. However, due to the requirements of technology and process scale, on the one hand, the sulfur content in iron concentrates produced by many copper concentrators often exceeds the standard. During the smelting process, part of the sulfur in iron concentrates is produced in the form of harmful gaseous sulfides, causing environmental damage. Adverse effects, the other part enters the pig iron, and the sulfur-containing pig iron will produce "hot embrittl...

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
IPC IPC(8): B03B9/06
CPCB03B9/06Y02W30/52
Inventor 彭时忠许家和张驰庞勃丁鹏郭运鑫张群英吴娜娜王周和朱继生
Owner 安徽铜冠产业技术研究院有限责任公司
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