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

Copper slag and laterite nickel ore co-reduction method for preparing copper-containing, nickel-iron powder

A technology of laterite nickel ore and ferronickel powder, which is applied in the field of metallurgy and material science to achieve the effect of improving metal recovery rate, reducing powder, and reducing ring formation in rotary kiln

Active Publication Date: 2019-01-29
CENT SOUTH UNIV
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Foreign high-grade lateritic nickel ore resources are mostly controlled by companies such as Japan, Europe and the United States, while low-grade lateritic nickel ore accounting for 70% of the reserves has no effective extraction technology

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A method for co-reduction of copper slag and laterite nickel ore of the present invention to prepare copper-containing, ferronickel powder, specifically comprises the following steps:

[0030] (1) Pretreatment of lateritic nickel ore: dry the low-grade lateritic nickel ore containing 17.49% iron and 1.7% nickel to a moisture content of 10% to 15%, crush it to a particle size of less than 3mm, and then pass it through high-pressure roller milling. Until the specific surface area of ​​laterite nickel ore is not less than 1500cm 2 / g, more than 80% of the particle size is less than 0.074mm, and the pretreated laterite nickel ore is obtained.

[0031] (2) Copper slag pretreatment: The copper slag containing 40.03% iron and 0.63% copper is subjected to high-pressure roller grinding until more than 80% of the particles in the copper slag have a particle size of less than 0.074mm and a specific surface area of ​​not less than 2000cm 2 / g to obtain pretreated copper slag.

[...

Embodiment 2

[0039] A method for co-reduction of copper slag and laterite nickel ore of the present invention to prepare copper-containing, ferronickel powder, specifically comprises the following steps:

[0040] (1) Pretreatment of lateritic nickel ore: dry the low-grade lateritic nickel ore containing 17.49% iron and 1.7% nickel to a moisture content of 10% to 15%, crush it to a particle size of less than 3mm, and then pass it through high-pressure roller milling. Until the specific surface area of ​​laterite nickel ore is not less than 1500cm 2 / g, more than 80% of the particle size is less than 0.074mm, to obtain pretreated lateritic nickel ore.

[0041] (2) Copper slag pretreatment: The copper slag containing 40.03% iron and 0.63% copper is subjected to high-pressure roller grinding until more than 80% of the particles in the copper slag have a particle size of less than 0.074mm and a specific surface area of ​​not less than 2000cm 2 / g to obtain pretreated copper slag.

[0042](3) ...

Embodiment 3

[0049] A method for co-reduction of copper slag and laterite nickel ore of the present invention to prepare copper-containing, ferronickel powder, specifically comprises the following steps:

[0050] (1) Pretreatment of lateritic nickel ore: dry the low-grade lateritic nickel ore containing 17.49% iron and 1.7% nickel to a moisture content of 10% to 15%, crush it to a particle size of less than 3mm, and then pass it through high-pressure roller milling. Until more than 80% of the particles in the laterite nickel ore have a particle size of less than 0.074mm and a specific surface area of ​​not less than 1500cm 2 / g, to obtain pretreated laterite nickel ore.

[0051] (2) Copper slag pretreatment: The copper slag containing 40.03% iron and 0.63% copper is subjected to high-pressure roller grinding until more than 80% of the particles in the copper slag have a particle size of less than 0.074mm and a specific surface area of ​​not less than 2000cm 2 / g to obtain pretreated coppe...

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
specific surface areaaaaaaaaaaa
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing iron powder containing copper and nickel by coreduction of copper slag and nickel laterite ores. The method comprises the following steps: nickel laterite ores, copper slag and a composite binding agent are mixed and pelletized to obtain green balls; the green balls are preheated after drying, and are fed in a rotary kiln; reducing coals are added for reduction to obtain reducing products; and the ore grinding and the magnetic separation are performed on the reducing products to obtain the iron powder containing copper and nickel. The method can realize comprehensive utilization of the copper slag and the nickel laterite ores by one step, and obtains the iron powder containing copper and nickel to provide high-quality burdens for smelting of weather resistant steel; and meanwhile, the excellent soft melting characteristic of the copper slag is used for reinforcing generation of a liquid phase in the reduction process, so that the aggregation and the growth of iron grains are accelerated, and the copper and nickel recovery rates are increased.

Description

technical field [0001] The invention relates to the technical field of metallurgy and material science, in particular to a method for co-reducing copper slag and laterite nickel ore to prepare copper-containing nickel-iron powder. Background technique [0002] Weathering steel is a low-alloy steel series between ordinary steel and stainless steel. Weathering steel is made of ordinary carbon steel with a small amount of corrosion-resistant elements such as Cu and Ni. It has the toughness, plastic extension, forming, welding and cutting of high-quality steel. , abrasion, high temperature, fatigue resistance and other characteristics; weather resistance is 2 to 8 times that of ordinary carbon steel, and paintability is 1.5 to 10 times that of ordinary carbon steel. It is widely used in buildings, vehicles, bridges, towers, containers, railways Vehicles, oil derricks, harbor buildings, oil production platforms and other structural parts. In the process of producing weathering s...

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): C22B1/242C21B13/08C22B15/00C22B23/02
CPCC21B13/08C22B1/2406C22B1/242C22B15/0054C22B23/021C22B23/023
Inventor 潘建朱德庆李启厚郭正启薛钰霄李紫云梁钟仁
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