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6.3,3. Behaviour of chrome, vanadium, the titan.

exploration of behaviour of chrome, vanadium and the titan were is conducted during 23rd campaign at processing of the slurries which are production wastes of vanadium on NPO "Tulachermet" in a mix with ore.
The chemical compound shihtovyh materials is resulted more low, % on dry weight (1 - oxide scale, 2 - agloruda, 3 - a mix of slurries of manufacture ferrovanadija and ores): G €06щ SaO SiO, MPvbshch SoCtu ViOs TiOi CriOj AbOj Wp, % 1 69,5 0,2 5,25 0,94 0,03 - - 0,29 1,17 3 2 57,2 1,7 10,5 0,04 0,22 - - - 1Д 6 3 45,0 5,98 8,8 1,12 1,14 1,0 1,3 0,64 3,91 9 Blanket operating time of the oven in a mode of profusion of these raw materials was equaled 97 ch. Giving of ferriferous raw materials was led continuously and changed within 16-22 t/ch. The oxygen contents in barbotazhnom blow made 50-60 %. Reburning of combustible gases (WITH and Н2) fabricated oxygen (02 - 99,5 %) which expense made 1,54,6 thousand nm3/ch. As fuel used the Kuznetsk coal of brand TM containing 80,2 % With, 14,4 % of flying, 11,4 % of ashes, 7,5 % of the moisture which expense made 10-15 t/ch. Izvest submitted periodically for maintenance of basicity of slag to ovens within 0,7-1,1.
On fig. 78-87 indicators of work of installation in a current of two days of work are resulted.
T/hour
I
257
Date ': 4.0Г.В9 Ifybecmb ¦ - r G
L
Ml.

p
~ — j 1 "1
G
1 II:-1
G
- J t/hour

ABOUT 1 AND 6 1Ю&АЯМ&М0
vreija astronomical, hour
Fig. 78 Expense shihtovyh materials * - a mix of slurry and aglorudy, ** - fines breeze koksika 258 t/hour
Date: 5.07.89 is
T/hour fltfMWs?
ggp
I
- "Ылям*

m h ifz;
_; ir ctli g || p Coal t—1 t/hour
L?
0 L
Time astronomical, hour
Fig. 79 Expense shihtovyh materials
3,0
ABOUT/L
Date: 4.07.89—1 ch..... 1 JU
\
6
60
W
L 4 6 and/about SH/4/< 1 lO 12. #
time astronomical, hour of a Fig. 80 Expenses of oxygen on reburning (02 top), a wind rate on a barbotage (V du^ja) and the oxygen contents in blow (Og dup, I nju)
so
Date: 5.07.89 g, 3,0/J
About/about
ГРУ/77 ^ ^ 1 I ' - % t/tsj SO
SO lo
J 4 6 Z/ABOUT M/6/? AND
Time astronomical, hour
Fig. 81 Expense of oxygen on reburning (О2 top), a wind rate on a barbotage (V du^ja) and the oxygen contents in blow (Og dup, I the Bottom)

5.07.89


Fig. 84 Change of a chemical compound and basicity (SaO/BjUg) of slag on a course of melt
Date: 5.07.89 ss

J 4 6 g M/JL tf ft I J and?? I
Time astronomical, hour
ss

Fig. 85 Change of a chemical compound and basicity (CaO/SiOj) slag on a course of melt.


Fig. 86 Change teplosema from all caissons of the oven (Qx) and specific teplosem (QyJl) from the caissons located below a slag level
Time astronomical, hour
265 266 and,
wc
14
MZ\
m ml №
/6
Date: 5.07.89 ihf \A (to/4* And / V J

4 6 I JU M OF % AND ^ M *
Time astronomical, hour
Fig. 87 Change teplosema from all caissons of the oven (Qj;) and specific teplosem (Qyfl) from the caissons located below a slag level
Pig-iron had the following makeup, % (weights.): 4,0-4,6 with; 0,1-0,2 Si; 0,1-0,2 Mp; 0,130,70 Sg; 0,02-0,60 V.
In the course of swimming trunks investigated behaviour of basic elements.
It is fixed, that in metal passes nearby 98 %Fe, less than 10 % S, about 80 % R, 5-10 % Mp.
The assaying of influence of the basic technological parametres of swimming trunks on vanadium and chrome extraction in metal is carried out.
In table 32 data on a metal and slag chemical compound are cited. In table 33 results of calculation of partition ratioes of vanadium and chrome between metal and slag, degree of their extraction in metal and temperature are resulted.
Metal and slag PZHV chemical compound (campaign №23), mass.dolja, %
Table 32 La of sample (FeO) (V2Os) (Sg, Ol) m [Cr] 1 2,94 0,16 0,25 0,02 0,13 2 2,4 0,17 0,26 0,02 0,15 3 4,7 0,19 0,32 0,02 0,16 4 2 0,15 0,23 0,02 0,2 5 1,1 0,05 0,1 0,02 0,15 6 1,4 0,02 0,08 0,02 0,15 7 3,2 0,13 0,23 0,15 0,15 8 3,2 0,25 0,42 0,15 0,16 9 2,6 0,28 0,4 0,15 0,14 10 4,2 0,26 0,35 0,15 0,13 11 2,6 0,28 0,41 0,03 0,15 12 1,7 0,26 0,24 0,6 0,7 13 1,3 0,11 0,23 0,16 0,4 14 1,4 0,08 0,16 0,18 0,37 15 2,3 0,08 0,17 0,18 0,4 16 1,8 0,12 0,32 0,18 0,43 17 1,8 0,12 0,29 0,18 0,46 18 1,9 0,16 0,36 0,18 0,46 19 1,7 0,31 0,42 0,26 0,49 20 1,7 0,23 0,42 0,26 0,47 21 1 0,24 0,41 0,25 0,45 22 2,8 0,3 0,48 0,22 0,4 23 3,8 0,35 0,62 0,2 0,37 24 1,3 0,33 0,36 0,24 0,4 25 0,5 0,13 0,22 0,53 0,57
Table 33
Partition ratioes between metal and vanadium and chrome slag,
№ samples M / (V) [Cr] / (Cr) slag Temperature, To Degree of extraction, % V Sg 1 0,223 0,760 1776,2 16,41 38,86 2 0,209 0,843 1675,4 15,61 41,17 3 0,187 0,730 1688 14,23 38,00 4 0,237 1,271 1675,4 17,30 50,37 5 0,713 2,192 1788,8 37,48 61,81 6 1,784 2,740 1851,8 57,68 65,94 7 2,058 0,953 1763,6 60,58 43,92 8 1,071 0,557 1713,2 46,53 32,19 9 0,956 0,512 1738,4 43,98 30,46 10 1,029 0,543 1713,2 45,65 31,67 II 0,191 0,535 1700,6 14,44 31,36 12 4,118 4,263 1877 72,41 72,90 13 2,595 2,542 1826,6 64,97 64,59 14 4,014 3,380 1864,4 72,05 69,45 15 4,015 3,439 1877 72,05 69,72 16 2,676 1,964 1814 65,52 59,64 17 2,676 2,318 1851,8 65,52 62,88 1S 2,007 1,868 1788,8 60,07 58,61 19 1,497 1,705 1713,2 53,95 56,73 20 2,017 1,636 1751 60,17 55,85 21 1,859 1,604 1801,4 58,52 55,44 22 1,308 1,218 1788,8 51,01 49,42 23 1,019 0,872 1763,6 45,44 41,93 24 1,298 1,624 1700,6 50,83 55,70 25 7,274 3,787 1889,6 79,12 71,20 By holding regressionnogo the assaying of these experimental data dependences of partition ratioes of vanadium and chrome on temperature are received and Monoiron oxide contents in slag:
I-4
(6.23)
[Sg] 1,144-10 5,535 10
And = = — • e
0,5694
Sg
() (FeO),-9
(6.24)
_ [V] _ 6,64-10, 1> 0В.10чг
0,3415
L - TG V
(V) (FeO) where Ksg and Ku — chrome and vanadium partition ratioes between metal and slag in oven ROMELT accordingly; (FeO) - the monoiron oxide contents in slag, % (weights.); T - the temperature of slag melt, K.Koeffitsient of plural correlation was accordingly 0,73 and 0,75.
Values of indicators of distribution of vanadium and chrome between metal and slag and degree of their extraction by that above, than above temperature and more low the contents (FeO). At temperature nearby 1600 °s and the contents (FeO) 1-2 % are reached indicators of distribution of vanadium between metal and the slag, close to values, characteristic for a domain fusion (3,8-4,2). In the same way (FeO) and melt temperature influence an indicator of distribution of chrome. The size of an indicator of distribution of chrome reaches values 4,1.
On fig. 88 (and,) and 89 (and,) are shown dependence of degree of extraction and vanadium and chrome from (FeO) () and slag temperatures () (temperature defined under the empirical formula (section 9) on size of specific thermal streams on cooled elements of the oven see). Considering a high slag yield at holding of the experiments, as much as possible reached degree of extraction of chrome and vanadium in metal (about 60-70 %) can be considered as the satisfactory.
Restoration of the titan in the course of ROMELT does not receive appreciable development. The contents of the titan in pig-iron in a course of melt made 0,001-0,002 % even at acid slags.
The burden balance of the titan shows, that its transition in pig-iron made less than 0,1 % from arrival with raw materials. Absence of restoration of the titan and its transition in pig-iron to appreciable concentration prevents formation of carbides and nitrides of the titan and their stressing in the form of a solid phase in slag. It interferes with formation of short heterogeneous slags with high viscosity and propensity to foaming.
At usual for process ROMELT conditions, degree of extraction of vanadium and chrome in pig-iron a little bit more low, than at domain fusion. For increase of degree of their extraction change of technics of the fusion, providing achievement of temperature in the oven 1600 °s and more is required. It is possible to provide such change by change of a slag mode of process.
By results of explorations it is offered to use process ROMELT for processing of slurries of manufacture ferrovanadija on NPO "Tulachetmet".
Contents FeO in a donkey, mass.dolja, %
Fig. 88. Influence of the contents of an iron oxide in slag on degree of extraction of vanadium in metal

I
0 ^
1650 1700 1750 1800 1850 1900 1950
Temperature shpaka, To
»
Fig. 88,6). Influence of temperature of slag on degree of extraction of vanadium in metal 271 j S
·a X W
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A source: Usachyov Alexander Borisovich. Development of theoretical and technological foundations of iron production by the POMEJIT liquid phase reduction process. DISSENTATION for the degree of Doctor of Technical Sciences.. 2003

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