Method for preparing superfine nickel powder by direct reduction

A nickel powder, direct technology, applied in the field of direct reduction to prepare ultra-fine nickel powder, can solve problems such as non-compliance with environmental protection requirements

Active Publication Date: 2010-10-13
JINGMEN GEM NEW MATERIAL +1
View PDF1 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, there are some nickel powders produced by the carbonylation method, generally called carbonyl nickel powders, such as Canadian Inco nickel carbonyl powders, including T2

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 preparing superfine nickel powder by direct reduction
  • Method for preparing superfine nickel powder by direct reduction
  • Method for preparing superfine nickel powder by direct reduction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 3000ml of 87g / l NiCl 2 Concentrate and evaporate to 700ml, the Baume degree is 50°, cool and crystallize under the temperature of ice water, filter with suction, and dry at 50°C to obtain the crude product of nickel chloride crystals. Then, the obtained nickel chloride crystal crude product was dried at 150°C into NiCl 2 , grind finely, pass through a 100-mesh sieve, and reduce at 238°C for 16 hours to obtain nickel powder, whose label is Ni09120901.

Embodiment 2

[0038] The obtaining of nickel chloride crystal thick product is with front embodiment 1, then, the nickel chloride crystal thick product that obtains is dried into NiCl at 150 ℃. 2 , ground, passed through a 100-mesh sieve, and reduced twice at a temperature of 325°C for a total of 14.4 hours to obtain nickel powder, the label being Ni09101401.

Embodiment 3

[0040] The obtaining of nickel chloride crystal thick product is with front embodiment 1, then, the nickel chloride crystal thick product that obtains is dried into NiCl at 150 ℃. 2 , ground, passed through a 100-mesh sieve, and reduced at a temperature of 499 ° C for 2.7 hours to obtain nickel powder, the label being Ni09101403.

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
Fisherman's particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention relates to a process for preparing metal powder and provides a method for superfine nickel powder by direct reduction. The method comprises the following steps: drying and dehydrating nickel chloride crystals serving as a nickel source to obtain absolute nickel chloride; and performing a reduction reaction by using hydrogen at 230 to 700 DEG C in a protective gas to obtain the superfine nickel powder. In the preparation method, the absolute nickel chloride crystals are reduced directly to form the nickel powder. As the synthesis of a precursor (such as the nickel carbonate or nickel oxalate in the conventional wet-method process) is not required in the solid-phase direct reduction method, working procedures are saved and process cost is reduced greatly; and meanwhile, almostno waste water is discharged, so the method is favorable for environment protection. In addition, the absolute nickel chloride crystals are used as a nickel raw material to undergo a reaction in a hydrogen reducing atmosphere, so the source of carbon is reduced, the carbon content of the final product is reduced, and the low-carbon and environment-protection requirements are met.

Description

technical field [0001] The invention belongs to metal powder preparation technology, in particular to a method for preparing superfine nickel powder through direct reduction of solid phase method. Background technique [0002] At present, as a metal powder material, ultrafine nickel powder has gradually replaced gold, silver, etc. Precious metals are used in catalyst materials, electrode materials and hard alloys. For example, current electrode materials mostly use ultra-fine nickel powder as raw material to prepare lithium nickelate composite electrode materials. [0003] Ultrafine nickel powder has a variety of preparation methods, including nickel carbonyl thermal decomposition method, evaporation-condensation method, alloy method, gas reduction method, electrolysis method, mechanical pulverization method and liquid phase reduction method, etc. Among these methods, the liquid phase reduction method has become an important method for the preparation of ultrafine nickel p...

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): B22F9/22
Inventor 郭苗苗许开华
Owner JINGMEN GEM NEW MATERIAL
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