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

Flash smelting method of laterite nickel ore

A lateritic nickel ore and flash smelting technology, which is applied in the field of metallurgy, can solve the problems that the content of nickel and cobalt is difficult to exceed 20%, the product value is not high, and the selection effect is small, so as to avoid sticking phenomenon, improve reduction efficiency, and improve The effect of recovery

Active Publication Date: 2016-05-18
TIANJIN FLASH IRONMAKING TECH CO LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The existing processing methods of lateritic nickel ore can only achieve the effect of enriching nickel and cobalt according to the proportion of iron and nickel in the original ore. Therefore, the selection effect is small, such as the traditional blast furnace method or submerged thermal electric furnace method. The cobalt content is difficult to exceed 20%, the product value is not high, and the above method also consumes a lot of energy and causes great pollution
It is no longer suitable for today's energy-saving and efficient cleaning requirements in the metallurgical field

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
  • Flash smelting method of laterite nickel ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Such as figure 1 As shown, purchase the laterite nickel ore raw material powder with a particle size of 150 microns; add pulverized coal and oxygen into the laterite nickel ore smelting furnace with a diameter of 4 meters, control the temperature in the suspension smelting chamber to 1200 degrees Celsius, and contain 78-82% reduction Reducing atmosphere of gas: Coal oxygen is sprayed into the smelting chamber through the nozzle of the molten pool, the temperature in the molten pool is controlled to be 1430 degrees Celsius, the reducing atmosphere contains 83-87% reducing gas, and the smelting time in the molten pool is controlled to be 30 minutes.

[0047] By calculation, the nickel content in the product reaches 10%.

Embodiment 2

[0049] Such as figure 1 As shown, purchase the laterite nickel ore raw material powder with a particle size of 150 microns; add pulverized coal and oxygen into the laterite nickel ore smelting furnace with a diameter of 4 meters, control the temperature in the suspension smelting chamber to 1150 degrees Celsius, and contain 38-42% reduction Reducing atmosphere of gas: Coal oxygen is sprayed into the smelting chamber through the molten pool nozzle, the temperature in the molten pool is controlled to be 1430 degrees Celsius, the reducing atmosphere contains 83-87% reducing gas, and the smelting time in the molten pool is controlled to be 20 minutes.

[0050] By calculation, the nickel content in the product has reached 20%.

Embodiment 3

[0052] Such as figure 1 As shown, purchase the laterite nickel ore raw material powder with a particle size of 150 microns; add pulverized coal and oxygen to the laterite nickel ore smelting furnace with a diameter of 4 meters, control the temperature in the suspension smelting chamber to 1150 degrees Celsius, and contain 23-27% reduction The reducing atmosphere of gas: inject coal oxygen into molten pool 22 through molten pool nozzle, control the temperature in molten pool to be 1430 degrees centigrade, contain the reducing atmosphere of 83~87% reducing gas, control the smelting time in molten pool to be 10 minutes.

[0053] According to calculations, in the suspension smelting chamber, the iron in the laterite nickel ore is basically not reduced; after smelting in the molten pool, the content of nickel and cobalt in the obtained product reaches 40%.

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 invention discloses a flash smelting method for nickel laterite ores. The method comprises the following steps: performing smelting treatment on nickel laterite ore powder in a nickel laterite ore smelting furnace in a reducing atmosphere to obtain a nickel, cobalt and iron-containing alloy and smelting slag. The nickel laterite ore smelting furnace comprises a vertical furnace body, a horizontal furnace floor, a nickel laterite ore nozzle, a molten pool nozzle and a smoke extraction passage, wherein a levitation smelting chamber is formed in the vertical furnace body; a smelting chamber is formed in the horizontal furnace floor; a molten pool is formed at the lower part of the smelting chamber; the nickel laterite ore nozzle is arranged at the top of the vertical furnace body, so that the nickel laterite ore powder, pulverized coal, coke particles, a smelting agent and oxygen can be sprayed into the levitation smelting chamber from the top of the vertical furnace body; the molten pool nozzle is arranged on the sidewall of the horizontal furnace floor; temperature in the levitation smelting chamber is 800 to 1,200 DEG C, and the reducing atmosphere contains less than 85 percent of reducing gas. According to the flash smelting method for the nickel laterite ores, energy consumption can be remarkably reduced, and the nickel and cobalt content of a product can be increased.

Description

technical field [0001] The invention belongs to the field of metallurgy, in particular, the invention relates to a flash smelting method of laterite nickel ore. Background technique [0002] The existing processing methods of lateritic nickel ore can only achieve the effect of enriching nickel and cobalt according to the proportion of iron and nickel in the original ore. Therefore, the selection effect is small, such as the traditional blast furnace method or submerged thermal electric furnace method. The cobalt content is difficult to exceed 20%, the product value is not high, and the above method also has high energy consumption and great pollution. It is no longer suitable for today's energy-saving and efficient cleaning requirements in the metallurgical field. Therefore, there is an urgent need for further improvement on the smelting method of laterite nickel ore. Contents of the invention [0003] The present invention aims to solve one of the technical problems in ...

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): C22B23/02
Inventor 不公告发明人
Owner TIANJIN FLASH IRONMAKING TECH 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