OXYGEN BLOWING PROCESS FOR STEEL MAKING

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP80-00809A000500350191-9
• Release Decision: RIPPUB
• Original Classification: C
• Document Page Count: 3
• Document Creation Date: December 14, 2016
• Document Release Date: September 6, 2000
• Sequence Number: 191
• Publication Date: January 4, 1954
• Content Type: REPORT

Approved for Release 2000/09/14: CIA-RDP80-00809A000500350191-9
U.S. Officials Only
a ecuxurx: ~ r: s;.c~an.r~r
CENTRAL INTELLIGENCE AGENCY
INFORMATION REPORT
SUBJECT Oxygen Blowing Process for Steel
PLACE ACQUIRED
(BY SOURCE)
DATE ACQUIRED
(BY SOURCE)
4. "'Converter Lining - The methods i
in principle similar as applied i.c-
varters.
converters basic aze
:,,ttorr~ blown or side blown con-
5. "'The experiences of Linz ..nd ~..r..i.>.j e.nd Hurkingen German Me-nneomann,
Duisburg- Huclcingen7 'drive ali01"11 tne.t -:ue rr.x ::~r'mn.r,ce with nugnesit, nlagnesitic
dilomit or calcined dolomit wag .i.nce conditiox,s during he process
of blowing in ';he o:tySen blown :tr mr?r:ti leas severe than in the bottom
blown converter. We are giving ; :; t+ I?r:lncipral analysis of the materials
which have been applied so far:
:?olomit
Dolomit
Mrg0
(0%
35%
Spur
Si02
CaO
Rent
60%
3
A1203 , -
%
U.S. Officials Only
C011IFTDE 7T.'l,'1.Z,
cBitdGfil dIY., rl M F.4.tah'~nFalr9M
DISTRIOUTION STATE }' ARMY ~~TAYY T, AIR J, Pal
This report le for the use wltbt: the USA of the Inteslil'ence components of the Departments or
a ffeiMitided
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0191-9
6. "Irhlese analy.SO3 of course give SOtw '_i1.-r.L. nr1 only of the materials in use,
but of much greater importance 1, vri?ornia.nce and lining life is
the mineralogical history of such calcining process, crushing,
grading, :nixing with proper bitnie s, wrlou mixing, mixing time,
ramming of 7 fining or pressing of .in of new converter linings etc.
7.
for the linings were used mgnesi ra ;;;:h in Radenthein fAAustria7,
dolomi's of Czakova fPoland/ and Dorfl 1, S - Rheinland German,Y7 is well
as magnesit.c dolomit from Veitsch jAus-!"o j -
:. + ;; in the case for electric arc
v
8.
"'Pre-fabricated blocks are being
: -?rt?---> ?,,._., ~-[acturers. The pressed tar bonded
furnaces according to drawings trot.
bricks are either bought from mauui wr= ~'a=== /sand preferably manufactured by
the users themselves on site in crier ~'._id long transit and storage times
particularly in the case of dol.omi;;a.
9.
"'Donawitz obtains pre-fabricated. ta= ci ter:.:!=: i nagnesitic' dolomit bricks of the
Veitsche Magnesitwerke, while L'ins urn its own bricks on site.
10.
"Of utmost importance is the proper
following sieve analysis has been aJ'r'1_~.'
of the crushed material. The
irr with greatest success:
25A 0 i. n:r r
25% 1 - rs K'
25c,'j ?. l ~ , n:.. ~1'
2% .1 _. rgiq
11.
"'This analysis is being prepe.rod >
_ .chs and ramming material.
12.
"'The tar for bonding fipecial stee't.
and should have a certain content
Magnesit or. magnesitic dolom?1't 6,~ o!' t,'.?
10% are necessary. For ramming nib
must be properly dehydrated
i'or tiie manufacture of bricks from
case of
r~ more tarcmaydbe~neceseary.
13.
Meier also conuaented an a 35-ton m:;nv'ir`
a 25-ton converter which is used at Da:,:,,ri:.
which is used at Linz and
14. "In the case of Linz, conventional ty :u %!? U converter-shells have been
new shells which are of the 25X1 X
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c +.v-n# -_ 'Roth plants use l:ining. 25X1 X
,.teet
r
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a~ta?Y the same as in the case of
, :x
t Ebbw Vale bra=:'!
.
,
material a
The
Corby, the Dolomit from Steetly ar.+l aestilled and prepared steel
works tar from the Yorkshire Tar Deat.~ ~?`?,` in both cases, whether bricked or
rammed, the lining life was equally _r ?;?r?ver, a bricked lining has its
advantages over a fully monolytic lining,:
"a) With bricks one is able to shape t~.,~ inside as one wishes such
as thickening up parts of the is prone to excessive wear,
etc, whilst with ramming one is com~_c:'!.'~w ::ci ram up in accordance with
the round and cylindric steel. sheL.l ;aa ate: n.
"b) Once a converter lining is finl.she:.i Es:..i '~. to be replaced by a new
lining, it is much easier to br?erik sn id bricked lining than an old
monolytic lining,
CONF'TDENa,IAL/US 0FJ Si::2AZS nttLf
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 Approved For Red Pi%iP b'6$~6Ji1-#' `'CIA- 80-00809A00 9
Less man-hours are needed
inr b: =.7.n r ::r% a converter in comparison
with ramming. At Corby, a complete new monolytie
lining from the moment last hca , o --L tc, the commencement of blowing
steel in new lining ~J eight i?.our!3 cc ..Inwn, 11F hours stripping or
breaking out old ].fining, two 11r> .; = ..: -u. role? ing, 1+8 ?'.ours ramming
approximately 100 t of dolour:.; ; 1'o a 25 t converte7,
eight hours firing and burning-:....
At Ebbw Vale fo,: bricking x,1,1; .c, :~inately eight hours for
cooling down, 10 hours break:Ln, two hours scaffolding, 36 h')urs
bricking, eight hours firing; +A:._1g
15. "By the way, at the beginning or the la t 14:t, Corby abandoned the monolytic
linngs also and ever since they
13411 < '~r;_;~ cnr.vr_-rters now with the so-called
brick ~ressed d~lomit brick diPp n taa%, which is manufactured by
General Refractories Ltd in Shef- Je- ,, . Yt--,zv clelm as advantage in comparison
with the earlier used monolytic 1.4_;i o5 ;a n more uniform lining lifer.
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or ramming compositions for oxygen,, ert-
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17. "As equipment
suggeist the following items:
a) Air tight storage b i.n r,. ?:..,. clrzhyC ration
b) Steam heated pug mi.1.1i=
c) Steam heated tar tsailc ;. .
d) Steam heated tar boil,e
e) Brtclc press
2/741.472 4M/D
2/741.~72 17M
2/741.472 22M
734.271 22M
CONFIDENTIAL/US 0PUCIALS 0.NLY
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