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УДК 669.083.4
 
A.N. Smirnov, V.M. Safonov, A.Y. Tsuprun, V.N. Tiunov,
V.I. Zema, V.A. Timofeev, I.N. Salmash
RPC «Donix», JSC NKMZ, OJSC VSW, DonNTU
 
Magazine «Stal'» № 8, 2006

 

Before reconstruction the open-hearth plant of CJSC «Vyksa Steel Works» included three main 250 t open-hearth furnaces (scrap-process without oxygen), each of them was equipped with a tilting spout for tapping into two teeming ladles. According to the technology used on the plant the steel was reduced in the furnace by silicon and manganese, and the final reduction took place during tapping by ferrosilicon and complex alloy SCTA (45 % Si, 15 % Ca, 10 % Ti, 2 % Al) in each of the two ladles.

 

 

 

УДК 621. 771. 23: 621. 771. 06-71: 65. 011
 
Beygelzimer E.Y., Ostapenko A.L., Kuzmin A.V., Kozlenko D.A. (RPC «Donix»)
 
Magazine «Stal'» № 8, 2006

To obtain high mechanical properties of sheet products, hot rolling mills are equipped with controlled water cooling units (CCU). Such units usually include a large number (dozens) of sections, located above and under the stock in the direction of its movement. Laminar cooling units became especially popular on plate and strip mills. The main task of the CCU is to ensure the stock cooling at a specified speed down to the specified temperature without its buckling. Modern requirements to the temperature control accuracy and to its stability along the stock length can be satisfied only through automatic control over the CCU operation.

 

 

 

УДК621.771.251.08
 
V.S. Solod, Y.S. Dmitriev, D.N. Novikov, S.N. Rudskoy (RPC «Donix»)
 
Magazine «Metallurgicheskaya I Gornorudnaya Promyshlennost'» № 4, 2006.

On modern bar and wire mills the rotation of entry guide rollers of the working stands is controlled visually. As there are no devices for automated control over the rotation it is impossible to control the rollers availability during rolling. Thus, if one or both rollers stop, for example, due to the damage of the bearing, the metal pickup by the rollers or due to any other causes, it results in «cobbles». It is especially important to control the guide rollers availability during rolling on wire mills, equipped with finishing blocks. There are no devices for automated control over the guide rollers availability, besides, the visual control over the finishing block is impossible as the stands are covered with a housing, and the rolling speeds are high, up to 80-110 m/s. Therefore any «cobbles» at this section of the mill result in severe problems. It is possible to avoid emergency situations provided that the condition of the guide rollers is under continuous control, the speed of their rotation is recorded, its value is displayed on the monitor and the deviation of the rollers speed is estimated.

 

 

 

V. S. Solod, Candidate of Engineering Science, Assistant Professor, Head of Department,
R. Y. Kulagin, Junior Research Assistant,
A. G. Benetskiy, Research Assistant (RPC «Donix»)

Magazine «Metall i Lit'ye Ukrainy» № 7-8 2006

 

It is known [1] that the errors of the calculation of the energy-power parameters of pass rolling in the grooves by the method of the reduced or corresponding strip make up to 45 - 60%. Most errors are due to inaccurate determination of the projection of the metal-roll contact surface. To improve the calculation accuracy the paper [1] presents empirical dependencies that, according to the authors, work only for the conditions under which they were obtained.

 

 

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