2 Oxycup Eng

8/18/2019 2 Oxycup Eng

1/6

SHAFT FURNACE TECHNOLOGYfor Scrap and Waste Routes

Recycling By-Products

Export of Surplus Gas

Additional Hot Metal

Saving of Resources


2/6

During the past few yearsKüttner has supplied to thesteel industry a number oflarge shaft furnace melt shops

for scrap operation.

The scrap route was implemented in works loo-king for additional hot metal supply for their exi-sting steel making capacities or a way todecrease specific CO2 emission by supplemen-ting ore-based BF production.

Shaft furnaces are well suited for a variety of dif-ferent metallic charge materials like:

• dirty heavy metal scrap HMS1/2

• galvanised scrap (baled/shreddered)

• pit scrap or iron/steel skulls

Successful tests have been realized with HBI.Based on this it is now possible to also projectplants for pre-reduced/direct reduced materialsfrom rotary hearth/kiln or natural gas basedreduction plants. The integration of the meltshops into the works operation was implementedin close cooperation with the plant departments

specialized in iron and steelmaking, energy andenvironment or automation.

CUSTOMISED SHAFT

FURNACE PLANTS

ThyssenKrupp

Steel,

Germany

OXYCUP® forn-plant by-pro-

d li

Sicartsa,

Mexico

Horno Oxicupola

500.000 tpyrom scrap

Nippon Steel,

apan

Shuttle furnace450.000 tpyrom scrap

FE, Japan

win shaft plantnder construction

OXYCUP®

shaft furnace tech-nology is also ideally suitedfor the waste route.

Recycling of in-plant by-products saves valuableresources and reduces landfill disposal. TheOXYCUP® process is a smelting reduction


3/6


4/6

OXYCUP®:

HOW IT WORKS

Smelting reduction with

self-reducing C-BricksCharged from the top into the OXYCUP® shaft furnace the

self-reducing C-Bricks are first pre-heated in counterflow

with the furnace gas to some 500 °C. First metallic iron

will form in an outer shell of the brick. This shell will grow

and secure the stability of the brick above 1,000 °C

where the cement will disintegrate and direct reduction

starts with the help of carbon included.

At about 1,450 °C the brick has totally converted into

solid iron sponge which is melted together with other

metallic charge in the hearth. The hot metal will leave the

hearth continuously over an iron-slag siphon system at1,500 °C with a carbon content of about 4 %.

ThyssenKrupp

Steel, Germany

C-Brick making

plant with mixing

tower and curing

hall


5/6

Direct hot metal from in-plantby-products

In integrated steel works an OXYCUP® furnace

supplements the hot metal from the blast furnace.

Because of the comparatively small quantities, tor-

pedo cars or iron ladles first collect a portion ofhot metal from the OXYCUP® and then mix it by fil-

ling up with hot metal from a blast furnace. After

de-sulphurization the hot metal mixture is transfer-

red to the steel shop.

In times of high hot metal demand the OXYCUP®

can almost double its production if a high iron

charge, like 100 % pit scrap, is employed. Only

170 - 200 kg of coke are necessary to convert pit

scrap into one ton of hot metal. Low CO2 emissi-

ons are the result.Environmental authorities from the USA, Mexico,

Japan and Germany have confirmed that all other

emissions are also far below the permissible limits.

The cleaned top gas of blast furnace quality is

used in the gas network of the steel plant. In com-

bination with electric melting the OXYCUP® can

THE WINNER:

THE ENVIRONMENT

OXYCUP®

discharging of

hot metal in a

torpedo car

C-Brick bins

curing hallfor C-Bricks

mixing tower

b r i c k p r e s s

4 silos for cement & dusts

conveyor belt truck dischargefor sludgematerials

b r i c k c o n v e y o r

skulls and scrap area

coke & additives conveyor

coke, additivesC-Bricks storage

coke and additivecharging bins

scrubber

1 3 0

m

hot blast generation

OXYCUP® plant

exemplary layout

OXYCUP®

in an integrated

steel mill


6/6

6 3 1 7

e

The engineering company, which was foun-ded in 1949 by Dr. Carl Küttner, has evolvedinto a group of companies working worldwi-de in plant engineering and construction. Thecompany supplies and erects turnkey installa-tions for a wide range of process technolo-

gies, including melting and material handlingin the iron, steel and foundry industries.

KÜTTNER has build different types of furna-ces, like fluidised bed, rotary and shaft furna-ces for organic/anorganic waste, non-ferrousmetals and iron processing. The furnaces pre-sented in this field are a development of thelong campaign cupola furnaces for steel mills.

The services provided include developmentof new technologies, engineering anddesign, supply, installation and start-up of plants complete with controls and data pro-cessing systems.

The KÜTTNER-Group works with more than400 employees worldwide and is represen-ted in the international markets through anetwork of agents and affiliated companies.

KÜTTNER GMBH & CO. KG

[email protected]

www.kuettner.de

Küttner GmbH & Co. KG

Bismarckstr. 67 · 45128 Essen

Phone +49 (0) 201 72 93-0

Fax +49 (0) 201 77 66 88

2 Oxycup Eng

Documents

Transcript of 2 Oxycup Eng