The new technology sends iron fines and coal into a rotary hearth gas furnace where an oxygen reaction creates the iron nuggets. SDI CEO Keith Busse has told the Journal Gazette that the nuggets would be about half as expensive as the March 2004 cost of pig iron ingots, which was approximately $350 per ton.
In order to improve the efficiency of slag and iron separation, a new idea of "the separation of slag (solid state) and iron (molten state) in rotary hearth furnace process at lower temperature" is put forward. In this paper, the forming process of iron nuggets has been investigated. Based on those results, the forming mechanisms and influencing factors of iron nugget at low …
High Quality Iron Nuggets Using a Rotary Hearth Furnace. The Mesabi Nugget Project is a large-scale pilot project which successfully demon-strates the innovative ITmk3® ironmaking technology developed by Kobe Steel for the North American scenario. The ITmk3® pro-cess uses a rotary hearth furnace to turn iron ore fines and pulverized coal into ...
Fig 5 – Iron nuggets. Specific Consumption values for ITmk3 process. The specific consumption of materials and utilities per ton of nuggets for the ITmk3 process are (i) iron ore fines – 1.5 tons, (ii) non coking coal – 0.5 tons, (iii) fuel gas – 1.1 giga calories, (iv) electric power – 200 kWh, (v) water – 2 cum, (vi) compressed air – 85 cum, and (vii) nitrogen – 12 cum.
Fig.3-Iron Carbon diagram for pig iron by ITmk3 process. Table 1-Chemical Analysis Elements Content (%) 97.2 Phosphorus 0.01-0.025 Carbon 2.0-2.4 Sulphur 0.07-0.12 The process can be simply summarized as follows:- 1. Fine iron ore and pulverized coal are made into pellets. 2. These pellets are fed into a Rotary Hearth Furnace
The process has improved energy efficiency and emits 20% less CO 2 and produces high purity iron nuggets (96% - 97% pure). In 2009, Mesabi Nugget finished construction of the first plant to use the ITmk3 technology in Hoyt Lakes, MN. The plant began producing iron nuggets in January 2010 and has the capacity to produce 500,000 tonnes per year.
A method of producing iron from finely divided iron oxide comprising the steps of: mixing iron oxide or iron ore fines with finely divided coal and a binder to form a mixture, agglomerating the mixture by compacting, pelletizing, or briquetting the mixture to form agglomerates or pellets, introducing the pellets to a rotary hearth furnace to prereduce the iron in the pellets, introducing the ...
The pig iron nugget process (referred to as the Iron Technology Mark 3, or ITmk3, process by Kobe Steel) was developed as an alternative to the traditional blast furnace process. Throughout this ...
single stage of heating. It is therefore more energy-efficient than the current technology. Iron nuggets are produced by combining iron ore concentrate with a reducing agent (finely ground low-sulfur coal), a binder, and a flux to form pellets. These pellets are then heated to approximately 1400 – 1500°C in a rotary-hearth furnace.
Mesabi Nugget owns and operates a currently‐idled iron nugget processing plant at Hoyt Lakes, Minnesota. This facility is the first and only of its kind in the world, producing a highly metallized iron nugget using a rotary hearth furnace (RHF) process. The facility's processes are
offers three rotary hearth furnace-based technologies: FASTMET® provides for recycling of steel mill by-products with iron unit recovery; FASTMELT® processes steel mill by-products into hot metal or pig iron for steel mill use; and ITmk3® (pronounced "eye-tee" mark 3) produces high quality pig iron nuggets from iron ore. 8 Our technology ...
In comparison to pig iron produced in a blast furnace, the production of iron nuggets using the ITmk3 Process emits about 20% less carbon dioxide due to its good energy efficiency. With the start up of the commercial ITmk3 plant, Kobe Steel is moving quickly to popularize the ITmk3 Process in world markets.
@article{osti_1000412, title = {Next Generation Metallic Iron Nodule Technology in Electric Arc Steelmaking - Phase II}, author = {Fosnacht, Donald R and Iwasaki, Iwao and Kiesel, Richard F and Englund, David J and Hendrickson, David W and Bleifuss, Rodney L}, abstractNote = {The current trend in the steel industry is a gradual decline in conventional steelmaking from taconite pellets in blast ...
The International Iron Metallics Association was created to promote the use of ore-based metallics (pig iron, HBI, DRI, and iron nuggets) as value-adding raw materials for the iron and steel and ferrous casting industries. Safe and efficient handling and shipping of …
77 TECHNOLOGY REVIEW NO. 29 DEC. 2010 ITmk3 Process Shoichi KIKUCHI ＊1, Shuzo ITO, Dr. Isao KOBAYASHI, Osamu TSUGE ＊2, Koji TOKUDA ＊1 Research & Development Department, Iron Unit Division, Natural Resources & Engineering Business, ＊2 Midrex Technologies, Inc. The ITmk3 process, which produces high-quality iron (ITmk3 iron nuggets) from ore fines and …
Using anthracite coal, iron nuggets were produced in a furnace at 1500 ℃ yielding pig iron with an Fe purity of 96.52% (Guo et al, 2013). Pig iron nuggets have also been generated using thermal ...