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

Pyrogenic process for separation of tin in nickel-iron alloy scrap

A nickel-iron alloy and separation method technology, applied in the direction of improving process efficiency, can solve the problems of difficult tail gas treatment, easy corrosion of equipment, pollution of the environment, etc., and achieve the effect of low labor intensity, simple and feasible process, and low investment in equipment

Inactive Publication Date: 2016-08-17
CHONGQING YU LI METAL PROD CO LTD
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The first object of the present invention is to provide a method for pyrolytic separation of tin in nickel-iron alloy waste, to solve the technical problems of long tin separation process and difficult technical operation
[0006] The second object of the present invention is to provide a method for pyrolytic separation of tin from nickel-iron alloy waste to solve the technical problems of large investment in tin separation and smelting equipment and flue gas collection equipment, difficulty in tail gas treatment, easy corrosion of equipment, and environmental pollution

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
  • Pyrogenic process for separation of tin in nickel-iron alloy scrap

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Melting: Put the nickel-iron alloy powder whose main chemical composition is 32% nickel, 56% tin, and 10% iron into the crucible, and the crucible is heated and melted in the muffle furnace, and the temperature is controlled at 1400 degrees to melt all the nickel-tin-iron alloy in the crucible .

[0029] Melting: After the nickel-tin-iron alloy is completely melted, add 75% ferrosilicon to the melt in the crucible according to the nickel-silicon ratio of 2:1 for melting, and at the same time use a lifting shovel to directly add sawdust to the melt surface for protection; the above melting steps can be combined with The melting steps are combined, and the 75 ferrosilicon and nickel-tin-iron alloys are mixed and melted at the same time, and the melting process is also a smelting process.

[0030] Melting and casting separation: keep the smelted melt in the crucible in the muffle furnace for 10 minutes, then lift it out of the intermediate frequency furnace with a crane, h...

Embodiment 2

[0034] Melting: Put the nickel-iron alloy powder whose main chemical composition is 32% nickel, 56% tin, and 10% iron into the crucible, and the crucible is heated and melted in the muffle furnace, and the temperature is controlled at 1500 degrees to melt all the nickel-tin-iron alloy in the crucible .

[0035] Melting: After the nickel-tin-iron alloy is completely melted, 99 silicon is added to the melt in the crucible according to the nickel-silicon ratio of 2:1 for melting, and at the same time, sawdust is directly added to the surface of the melt for protection; the above melting steps can be compared with melting The steps are combined, 99 silicon and nickel-tin-iron alloy are mixed and melted at the same time, and the melting process is also a smelting process.

[0036] Melting and casting separation: keep the smelted melt in the crucible in the muffle furnace for 10 minutes, then lift it out of the intermediate frequency furnace with a crane, hold the crucible with clam...

Embodiment 3

[0040] Melting: Put the nickel-iron alloy powder whose main chemical composition is 32% nickel, 56% tin, and 10% iron into the crucible. The crucible is heated and melted in the intermediate frequency furnace, and the temperature is controlled at 1450 degrees to melt all the nickel-tin-iron alloy in the crucible.

[0041] Melting: After the nickel-tin-iron alloy is completely melted, add 75% ferrosilicon to the melt in the crucible according to the nickel-silicon ratio of 2:1 for melting, and at the same time use a lifting shovel to directly add sawdust to the melt surface for protection; the above melting steps can be combined with The melting steps are combined, and the 75 ferrosilicon and nickel-tin-iron alloys are mixed and melted at the same time, and the melting process is also a smelting process.

[0042] Melting and casting separation: keep the smelted melt in the crucible in the intermediate frequency furnace for 10 minutes, then lift it out of the intermediate frequen...

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 present invention relates to a pyrogenic process for separation of tin in nickel-iron alloy scrap. The process includes five steps of fusing, melting, casting separation, nickel ferrosilicon remelting, and result detection. By the above steps, tin in one ton of nickel-tin- iron alloy can be reduced to less than 3%, the tin recovery is more than 92%, tin content in crude tin is greater than 97.5%. The process not only solves the technical problems of separation long process and difficult technical operations in tin separation, but also solves the technical problems of large investment, difficult exhaust gas treatment, corrosion and environmental pollution of tin separation and smelting equipment and fume collection equipment, so as to achieve good technical result.

Description

technical field [0001] The invention relates to a method for separating tin in alloy waste, in particular, the invention relates to a method for separating tin in nickel-iron alloy waste by pyrolysis, which is applied in the field of ferronickel recovery. Background technique [0002] Nickel and tin, which are widely used in national production and daily life, are non-ferrous metals with high value, but the mineable mineral resources of nickel and tin are limited. With the extensive use of industry and life, its storage is decreasing day by day. Secondary recycling and comprehensive utilization are of great significance. The amount of nickel-tin-iron alloy waste is increasing year by year, mainly the waste generated in the machining process, the waste generated in the metallurgical industry and alloy components. In addition, most of the nickel-tin-iron alloy waste currently circulating in the domestic market is waste produced by electronic component factories, purchased thr...

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): C22B25/06
CPCY02P10/20
Inventor 吴勇张英明李彬
Owner CHONGQING YU LI METAL PROD CO LTD
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