公开(公告)号：US1378411A

公开(公告)日：1921-05-17

申请号：US37243320

申请日：1920-04-09

Applicant: HEGELER JULIUS W

Inventor： HEGELER JULIUS W

IPC: C22B1/245 ,  C22B19/02

CPC classification number: C22B19/02 ,  C22B1/245

公开(公告)号：US20230357884A1

公开(公告)日：2023-11-09

申请号：US18352745

申请日：2023-07-14

Applicant: Environmental Clean Technologies Limited

Inventor： Keith Michael HENLEY-SMITH ,  Adam David GILES ,  Lachlan Phillip Clive BARTSCH ,  Ashley Charles MOORE

IPC: C22B1/245 ,  C21B13/00 ,  C21B13/04 ,  C22B5/12

CPC classification number: C22B1/245 ,  C21B13/0066 ,  C21B13/04 ,  C22B5/12 ,  C21B13/0073

Abstract: A continuous process for low temperature reduction of metal oxides from carbonaceous material, using in situ produced reducing gas. In particular, a method of reducing metal oxide to metal in a continuous process comprising:



(a) continuously introducing composite bodies comprising low rank carbonaceous material and metal oxide containing material that are in intimate contact and in a dry mix ratio of from about 1:2 to about 1:10 to an upper region of an upright retort;
(b) conveying said bodies from said upper region to a heated lower region of said retort wherein said composite bodies are exposed to increasing temperature of up to about 950° C. and wherein said composite bodies are exposed to reducing gas generated in situ for a period of from about 15 minutes to about 3 hours to thereby produce a reduced metal containing product; and
(c) continuously removing the reduced metal containing product from a lower

公开(公告)号：US20190292626A1

公开(公告)日：2019-09-26

申请号：US16307567

申请日：2017-07-07

Applicant: S. A. Lhoist Recherche et Developpement

Inventor： Guillaume Criniere ,  Michael Nispel

IPC: C22B1/243 ,  C22B1/245 ,  C04B18/02 ,  C04B14/30 ,  C04B22/06

Abstract: Composition in the form of green or thermally treated briquettes comprising at least one “quick” calcium-magnesium compound comprising an iron-based compound and method of production thereof as well uses thereof.

公开(公告)号：US10407744B2

公开(公告)日：2019-09-10

申请号：US15310483

申请日：2015-05-13

Applicant: KOBE STEEL, LTD.

Inventor： Shorin O ,  Shuzo Ito

IPC: C21B13/10 ,  C21B13/00 ,  C21B11/08 ,  C21B11/10 ,  C21B13/12 ,  C22B1/24 ,  C22B1/245

Abstract: This method is for producing granular metallic iron in which the relation between the mass ratio (mass %) of the volatile matter content contained in a carbonaceous reducing agent and the average gas flow rate (m/s) of the ambient gas in a heating furnace fulfills expression (1). Mass ratio of volatile matter content≤−4.62×average gas flow rate+46.7 . . . (1)

公开(公告)号：US10364480B2

公开(公告)日：2019-07-30

申请号：US15517046

申请日：2015-09-15

Applicant: SUMITOMO METAL MINING CO., LTD.

Inventor： Junichi Takahashi ,  Taku Inoue ,  Shuuji Okada

IPC: C22B23/02 ,  C22B23/00 ,  C22B1/24 ,  C21B13/10 ,  C22B5/10 ,  C22C33/04 ,  C22B1/245 ,  C22C1/02 ,  C21B13/00 ,  C22B1/14 ,  C22B1/244

Abstract: A smelting method capable of obtaining an iron-nickel alloy having a high nickel grade of 4% or higher by effectively facilitating a reduction reaction of pellets formed using a nickel oxide ore as a raw material. The present invention is a method for smelting a nickel oxide ore, by which an iron-nickel alloy is obtained by forming pellets from a nickel oxide ore and reducing and heating the pellets. In the pellet production step S1, a mixture is obtained by mixing raw materials that contain at least a nickel oxide ore and a carbonaceous reducing agent. In the reduction step S2, a furnace floor carbonaceous reducing agent is laid on the floor of the smelting furnace in advance when placing the obtained pellets in the smelting furnace and the pellets are placed on the furnace floor carbonaceous reducing agent and then reduced and heated.

公开(公告)号：US20190144971A1

公开(公告)日：2019-05-16

申请号：US16093339

申请日：2017-04-19

Applicant: SUMITOMO METAL MINING CO., LTD.

Inventor： Takashi Iseki ,  Yukihiro Goda ,  Jun-ichi Kobayashi ,  Shuji Okada

IPC: C22B23/02 ,  C22B5/10 ,  C22B1/245

Abstract: Provided is a smelting method for producing metal by reducing a mixture that includes an oxide ore such as nickel oxide ore, wherein it is possible to improve productivity by raising the metal recovery rate as well as to inexpensively and efficiently produce high-quality metal. The present invention is a smelting method in which: an oxide ore and a carbonaceous reducing agent are mixed; the resulting mixture is heated and subjected to a reduction treatment; and metal and slag, which are reduction products, are obtained, wherein the reduction treatment is carried out in a state in which one or more surface deposits selected from carbonaceous reducing agents, metal oxides, and oxidation inhibitors are deposited on the surface of the mixture.

公开(公告)号：US10214788B2

公开(公告)日：2019-02-26

申请号：US15112820

申请日：2015-01-28

Applicant: Saudi Basic Industries Corporation

Inventor： Mohamed Bahgat Saddik

IPC: C22B1/24 ,  C22B1/245 ,  C21B13/02 ,  C21B13/00

Abstract: Disclosed herein are methods and compositions for producing composite iron pellets comprising an inner core comprising iron ore and a reducing agent comprising a carbonaceous material; and an outer shell comprising unreduced iron ore. The resulting composite iron pellets can be used to produce direct reduced iron (DRI) with improved productivity while reducing gas consumption.

公开(公告)号：US10041144B2

公开(公告)日：2018-08-07

申请号：US15328634

申请日：2015-06-30

Applicant: SUMITOMO METAL MINING CO., LTD.

Inventor： Junichi Takahashi ,  Taku Inoue ,  Shuuji Okada

IPC: C22B23/00 ,  C22B1/00 ,  C22B1/24 ,  C22B1/16 ,  C22B23/02 ,  C22B1/245 ,  C22C33/04 ,  C22B5/10

Abstract: 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 S1 for producing pellets from nickel oxide ore, and a reduction step S2 for heating the resulting pellets at a predetermined reduction temperature in a reduction furnace, the reduction step S2 comprising preheating the pellets obtained in the pellet production step S1 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.

公开(公告)号：US10017836B2

公开(公告)日：2018-07-10

申请号：US14650376

申请日：2014-01-30

Applicant: Kobe Steel, Ltd.

Inventor： Shoichi Kikuchi ,  Tsuyoshi Mimura ,  Takao Harada ,  Shingo Yoshida

IPC: C21B13/10 ,  C22B7/02 ,  C22B5/10 ,  C22B1/24 ,  C21B13/00 ,  C22B1/245

CPC classification number: C22B7/02 ,  C21B13/0046 ,  C21B13/105 ,  C22B1/24 ,  C22B1/245 ,  C22B5/10 ,  Y02P10/216

Abstract: Provided is a technique for increasing the yield of reduced iron, thereby improving productivity when manufacturing reduced iron by heating an agglomerate.This method for manufacturing reduced iron includes: a step in which a mixture is agglomerated, said mixture containing an iron oxide-containing substance, a carbonaceous reducing agent, and a melting point regulator; and a step in which reduced iron is manufactured by heating the obtained agglomerate, reducing and partially melting the iron oxide in the agglomerate, and aggregating the iron component. The particle size of the fine particulate iron generated in the step in which the reduced iron is manufactured is adjusted, and the fine particulate iron is blended into the mixture.

公开(公告)号：US20170204496A1

公开(公告)日：2017-07-20

申请号：US15328634

申请日：2015-06-30

Applicant: SUMITOMO METAL MINING CO., LTD.

Inventor： Junichi Takahashi ,  Taku Inoue ,  Shuuji Okada

IPC: C22B23/02 ,  C22B5/10 ,  C22B1/24 ,  C22B1/245

CPC classification number: C22B23/021 ,  C22B1/00 ,  C22B1/16 ,  C22B1/2406 ,  C22B1/2413 ,  C22B1/245 ,  C22B5/10 ,  C22B23/005 ,  C22B23/02 ,  C22C33/04

Abstract: 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 S1 for producing pellets from nickel oxide ore, and a reduction step S2 for heating the resulting pellets at a predetermined reduction temperature in a reduction furnace, the reduction step S2 comprising preheating the pellets obtained in the pellet production step S1 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.