SU342915A1 - METHOD FOR CONTROLLING THE SPEED OF OVEZUGULOROZHIVAN1 'METAL IN A STEEL-MELTING UNIT AGGRETHESHR-TSHM ^ ENABILITY • • - Google Patents
METHOD FOR CONTROLLING THE SPEED OF OVEZUGULOROZHIVAN1 'METAL IN A STEEL-MELTING UNIT AGGRETHESHR-TSHM ^ ENABILITY • •Info
- Publication number
- SU342915A1 SU342915A1 SU1490590A SU1490590A SU342915A1 SU 342915 A1 SU342915 A1 SU 342915A1 SU 1490590 A SU1490590 A SU 1490590A SU 1490590 A SU1490590 A SU 1490590A SU 342915 A1 SU342915 A1 SU 342915A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- metal
- controlling
- steel
- concentration
- aggretheshr
- Prior art date
Links
- 238000002844 melting Methods 0.000 title description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 16
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 15
- 239000007789 gas Substances 0.000 description 11
- 229910052786 argon Inorganic materials 0.000 description 8
- 229910052757 nitrogen Inorganic materials 0.000 description 8
- 229910002092 carbon dioxide Inorganic materials 0.000 description 5
- 238000005261 decarburization Methods 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 239000001569 carbon dioxide Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000010926 purge Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 230000036284 oxygen consumption Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
Description
Изобретение относитсо к металлургии, а Имеино к производству стали с применением кислорода.The invention relates to metallurgy, and to the production of steel using oxygen.
Известен снособ контрол скорости обезуглероживани металла в сталеплавильном агрегате, работающем с продувкой ваииы газообразным окислителем, включающий определение количества отход щих газов и измерение в них концентрации окиси и двуокиси углерода.A known method for controlling the speed of the decarburization of a metal in a steel-smelting unit, operating with a gaseous oxidizer purge, includes determining the amount of exhaust gases and measuring the concentration of oxide and carbon dioxide in them.
Недостатком известного способа вл етс то, что количество отход щих газов определ ют при помощи щайбы, устанавливаемой в газоходе, котора забиваетс плавильной пылью, в результате чего снижаетс точность контрол скорости обезуглероживани .A disadvantage of the known method is that the amount of exhaust gases is determined by means of a plate placed in the flue, which is clogged with melting dust, as a result of which the accuracy of controlling the decarburization rate is reduced.
Цель изобретени - повышение точности контрол . Это достигаетс тем, что количество отход щих газов определ ют по измеренному текущему значению расхода дуть и концентрации азота и аргона в нем и в отход щих газах.The purpose of the invention is to improve the accuracy of control. This is achieved by determining the amount of exhaust gases is determined by the measured current flow rate of the blowing and the concentration of nitrogen and argon in it and in the exhaust gases.
Предлагаемый способ осуществл ют следующим образом.The proposed method is carried out as follows.
В процессе продувки металла, например, в конвертере непрерывно измер ют расход кислорода , а также концентрации в нем азота и аргона. В отход щих газах определ ют концентрации окиси углерода, двуокиси углерода , азота и аргона.During the metal purging process, for example, in a converter, oxygen consumption is continuously measured, as well as the concentration of nitrogen and argon in it. In the exhaust gases, concentrations of carbon monoxide, carbon dioxide, nitrogen and argon are determined.
Скорость обезуглероживани углерода определ етс , исход из известного соотношени :The carbon decarburization rate is determined on the basis of the known relationship:
V,k(CO + CO,}V,,(1)V, k (CO + CO,} V ,, (1)
где FC - скорость окислени углерода,where FC is the oxidation rate of carbon,
кг/сек;kg / s;
СО - концентраци окиси углерода в отход щих газах; СО2 - концентраци двуокиси углеродаCO is the concentration of carbon monoxide in the exhaust gases; CO2 - carbon dioxide concentration
в отход щих газах;in exhaust gases;
К - коэффициент пронорциональности. Па основании произведенных измерений составл ютс уравнени баланса азота и аргона:K - coefficient of inequality. On the basis of the measurements made, the nitrogen and argon balance equations are compiled:
NlV, N2-V,,(2)NlV, N2-V ,, (2)
ArV, + Ar-Н/д ArVr,(3)ArV, + Ar-N / d ArVr, (3)
где Na - концентраци азота в воздухе;where Na is the concentration of nitrogen in the air;
N 2 - концентраци азота в дутье;N 2 - nitrogen concentration in the blast;
iNp -концентраци азота в отход щих газах;iNp is the nitrogen concentration in the exhaust gases;
концентраци аргона в воздухе; Аг - концентраци аргона в дутье; argon concentration in air; Ar is the argon concentration in the blast;
Ат - концентраци аргона в отход щих газах; Количество отход щих газов определ етс при совместном решении уравнений (2) и (3): ArW -A lAr-i ArWj -Л АгПодставл уравнение (4) в уравнение (1), получаем уравнение дл определени скорости обезуглероживани металла; ArW -ЛГ|Агл /c /fe(CO + CO,) ArWg -AlAr4 Предмет изобретени Способ контрол скорости обезуглероживани металла в сталеплавильном агрегате, работающем с продувкой ванны, включающий определение количества отход щих газов и измерение в них концентрации окиси и двуокиси углерода, отличающийс тем, что, с целью новыщени точности контрол , количество отход щих газов определ ют по текущему значению расхода дуть и концентрации азота и аргона в нем и в отход щих газах.At is the concentration of argon in the exhaust gases; The amount of waste gases is determined by the joint solution of equations (2) and (3): ArW -A lAr-i ArWj-L Ar Substitutes equation (4) into equation (1), we obtain the equation for determining the decarburization rate of the metal; ArW-LH | Agl / c / fe (CO + CO,) ArWg-AlAr4 Subject of the Invention A method for controlling the rate of metal decarburization in a steelmaking unit operating with a bath purge, including determining the amount of waste gases and measuring the concentration of oxide and carbon dioxide in them, characterized in that, in order to improve the control accuracy, the amount of exhaust gases is determined by the current value of the flow rate and the concentration of nitrogen and argon in it and in the exhaust gases.
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