Plant and method for recovering metals and/or metal oxides from industrial process waste, in particular refinery waste
US-11199360-B2 · Dec 14, 2021 · US
Method for smelting nickel oxide ore
US2017204495A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2017204495-A1 |
| Application number | US-201515328619-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jul 10, 2015 |
| Priority date | Aug 1, 2014 |
| Publication date | Jul 20, 2017 |
| Grant date | — |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
A method for smelting nickel oxide ore according to the present invention uses pellets of nickel oxide ore and is characterized by comprising: a pellet production step S 1 for producing pellets from nickel oxide ore; a reduction step S 2 for heating the resulting pellets at a predetermined reduction temperature in a reduction furnace to obtain a mixture of iron-nickel alloy and slag; and a separation step S 3 for separating out and recovering the iron-nickel alloy form the resulting mixture, the separation step S 3 comprising the creation of pulverized matter by pulverizing the mixture so that at least the slag becomes smaller than 2 mm, and sorting the resulting pulverized matter with a magnetic force of 300 to 600 gauss.
First claim
Opening claim text (preview).
1 . A method for smelting nickel oxide ore using pellets of nickel oxide ore, the method comprising: a pellet production step of producing pellets from the nickel oxide ore; a reduction step of obtaining a mixture of iron-nickel alloy and slag, by heating the pellets obtained at a predetermined reduction temperature with a reducing furnace; and a separation step of separating and recovering the iron-nickel alloy from the mixture obtained, wherein the mixture is pulverized so that at least the slag becomes a size less than 2 mm to make a pulverized material, and the pulverized material thus obtained is sorted with a magnetic force of 300 Gauss to 600 Gauss in the separation step. 2 . The method for smelting nickel oxide ore according to claim 1 , wherein the nickel oxide ore is limonite or saprolite. 3 . A method for separating and recovering an iron-nickel alloy by separating and recovering the iron-nickel alloy from a mixture of the iron-nickel alloy and slag obtained by subjecting pellets of nickel oxide ore to a reducing heat treatment, the method comprising: pulverizing the mixture so that at least the slag becomes a size less than 2 mm; and sorting a pulverized material obtained by pulverizing with a magnetic force of 300 Gauss to 600 Gauss.
Assignees
Inventors
Classifications
- C22B23/021Primary
by reduction in solid state, e.g. by segregation processes · CPC title
enduration of pellets · CPC title
with formation of ferro-nickel or ferro-cobalt · CPC title
with carbonaceous material for the production of coked agglomerates · CPC title
by solid carbonaceous reducing agents · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US2017204495A1 cover?
- A method for smelting nickel oxide ore according to the present invention uses pellets of nickel oxide ore and is characterized by comprising: a pellet production step S 1 for producing pellets from nickel oxide ore; a reduction step S 2 for heating the resulting pellets at a predetermined reduction temperature in a reduction furnace to obtain a mixture of iron-nickel alloy and slag; and a se…
- Who is the assignee on this patent?
- Sumitomo Metal Mining Co
- What technology area does this patent fall under?
- Primary CPC classification C22B23/021. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Jul 20 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).