Method for Manufacturing Briquettes Containing a Calcium-Magnesium Compound and an Iron-Based Compound, and Briquettes Obtained Thereby
US-2019345066-A1 · Nov 14, 2019 · US
Method for smelting nickel oxide ore
US2017204496A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2017204496-A1 |
| Application number | US-201515328634-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jun 30, 2015 |
| Priority date | Aug 1, 2014 |
| Publication date | Jul 20, 2017 |
| Grant date | — |
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Abstract
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Provided is a method for smelting nickel oxide ore by which the occurrence of cracking due to heat shock can be suppressed when nickel oxide ore is pelletized and charged into a smelting step (reduction step). A method for smelting nickel oxide ore according to the present invention uses pellets of nickel oxide ore, the method being characterized by comprising a pellet production step S 1 for producing pellets from nickel oxide ore, and a reduction step S 2 for heating the resulting pellets at a predetermined reduction temperature in a reduction furnace, the reduction step S 2 comprising preheating the pellets obtained in the pellet production step S 1 to a temperature of 350 to 600° C. in the reduction furnace and thereafter charging the pellets into the reduction furnace and raising the temperature of the reduction furnace to the reduction temperature.
First claim
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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; and a reduction step of conducting a reducing process that heats the pellets obtained at a predetermined reduction temperature with a reducing furnace, wherein the pellets obtained in the pellet production step are charged into the reducing furnace, and heat treatment to heat in advance the pellets at a temperature of 350° C. to 600° C. with the reducing furnace is conducted prior conducting the reducing process to raise the reducing furnace to the reduction temperature in the reduction step. 2 . The method for smelting nickel oxide ore according to claim 1 , wherein the pellets are heated at a temperature of 400° C. to 550° C. in the heat treatment. 3 . The method for smelting nickel oxide ore according to claim 1 , wherein pellets are produced in the pellet production step by conducting heat treatment on a lump made by forming the nickel oxide ore into an aggregate form. 4 . The method for smelting nickel oxide ore according to claim 3 , wherein the pellets are produced in the pellet production step by conducting heat treatment on the lump by holding at a temperature of 100° C. to 170° C. for 2 hours or more. 5 . The method for smelting nickel oxide ore according to claim 2 , wherein pellets are produced in the pellet production step by conducting heat treatment on a lump made by forming the nickel oxide ore into an aggregate form. 6 . The method for smelting nickel oxide ore according to claim 5 , wherein the pellets are produced in the pellet production step by conducting heat treatment on the lump by holding at a temperature of 100° C. to 170° C. for 2 hours or more.
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- What does patent US2017204496A1 cover?
- Provided is a method for smelting nickel oxide ore by which the occurrence of cracking due to heat shock can be suppressed when nickel oxide ore is pelletized and charged into a smelting step (reduction step). A method for smelting nickel oxide ore according to the present invention uses pellets of nickel oxide ore, the method being characterized by comprising a pellet production step S 1 for …
- Who is the assignee on this patent?
- Sumitomo Metal Mining Co
- What technology area does this patent fall under?
- Primary CPC classification C22B1/245. 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).