The Research Institute of Metallurgical Heat Engineering Celebrates Its 80th
Anniversary Zainullin L. A., Druzhinin Gh. M
Cooling of Fine Grain Lissakovsky Iron Ore Deposit Concentrate in a Rotating Drum
Karelin V. Gh., Zainullin L. A., Artov D. A., Epishin À. Yu., Naidenov V. À.
The cooling method of fine grained iron ore concentrate calcinated at a temperature of 900 – 950 °Ñ was worked through by using of commercial rotating drum cooler. Concentrate cooling is carried out with air owing to evaporating cooling of water supplied into the cooler and water poured from the outside to the drum body. It is shown that the temperature of the concentrate cooled and air warmed up are influenced by various characteristics.
Key words: iron ore concentrate, rotating drum cooler.
Comparative Analysis of Heat Circuits of Modern Roasting Conveyor Belt Machines
Kopot N. N., Vorobiev À. B., Goncharov S. S., Butkarev À. À., Butkarev À. P.
The comparative analysis of the modern heat engineering schemes of roasting conveyor machine for heat treatment of iron ore pellets was carried out using VNIIMT methodology. It was proved that each scheme under consideration has reserves for its performance improvement.
Key words: roasting conveyor machine, comparative analysis, heat engineering scheme, iron ore pellets.
Experience in Upgrading the Roast Machine ÎÊ-124
Butkarev À. À., Butkarev À. P. , Urdubaev R. À., Êrotov S. Gh., Ashcheulov V. N.
OJSC VNIIMT and JSC SSGPO modernized the roasting conveyor machine OK-124 N 5 at JSC SSGPO. The efficiency of the machine has increased, the specific consumption of natural gas, and the power consumption for forced draft devices drive were decreased.
Key words: roasting conveyor machine, heat engineering scheme, iron ore pellets, modernization.
Ajustment of Technological Regimes of Pellets Thermal Treatment in the Upgraded Roasting Machine ÎÊ-124
Butkarev À. À., Butkarev À. P., Zhomiruk P. À., Martynenko V. V., Grinenko N. V.
The development of process conditions for pellet heat treatment using renewed OK-124 roasting conveyor machine N 5 at JSC SSGPO was carried out. Measurements of temperature in different areas according to the height and width of calcining machine were made, as well as evaluation of the air gas flow characteristics (temperature, pressure, consumption). The machine width pellets heat treatment uniformity was provided, harmful suctions through longitudinal seal were reduced, the optimal heat treatment conditions were determined.
Key words: heat treatment conditions, iron ore pellets, roasting conveyor machine, heat engineering scheme, modernization.
Peculiarities of Designing, Drying and Heatingkup of the Hearth and Overflow
Header in Upgrading of the Roasting Machine ÎÊ-124
Butkarev À. À., Butkarev À. P. , Martynov À. P., Ashcheulov V. N., Sneghirev V. V.
The analysis of overflow collectors design in roasting conveyor machines for iron ore pellets heat treatment was carried out. The paper describes the peculiarities of design, time temperature relationship of furnace and overflow collector drying and heating up when modernizing OK-124 roasting conveyor machine No 5 at JSC SSGPO with machine width of 2 meters.
Key words: overflow collector, refractory lining, drying and heating up conditions, roasting conveyor machine, heat engineering scheme, iron ore pellets.
Experience in Development and Introduction of Ignition Hearths of Sintering
Gherasimov L. Ê., Druzhinin Gh. M., Khammatov I. Ì., Spirin N. À., Chistopolov V. À.
The paper addresses determination of the main operational and design characteristics of ignition furnace for sintering machines on the basis of concrete source data. The method is used when designing small furnaces for combined furnace charge heating. The furnaces of this design are installed on 10 sintering machines with pellet cars width of 3 m, and they allow twofold reduction of the specific heat consumption for ignition in comparison with the elongated furnaces used in 1960 – 1970 without top layer agglomerate quality reduction.
Key words: sintering machine, agglomerate, furnace, ignition, heat, furnace charge.
The Facility for Thermal Treatment of Disperse Materials and Its Industrial Manufacture
Podkovyrkin Å. Gh., Zhukov Yu. S., Korshunova N. Gh., Bakov À. V., Sovetkin V. L.
The paper addresses the operating principles of rotary vortex aggregates for heat treatment of paste like dispersed materials of fraction 3 – 0 mm, with humidity up to 60 %, and oil content up to 5 %. It describes the mathematical model of heat and mass exchange for the vortex flow of a heat carrier with pouring layer of dispersed material, developed on the basis of research at VNIIMT and industrial trial of the oil containing scale utilization unit with capacity of 600 kg/h at OJSC Sinarski Pipe Plant.
Key words: burning, paste like dispersed materials, rotary vortex aggregate.
Development and Introduction of New Burner Devices in the Roasting Conveyor Belt Machines
Vintovkin À. À., Dengub V. V., Khohklov V. À., Zhomiruk P. À., Ashcheulov V. N.
The paper addresses the results of development of new ejection burner series for horizontal grate machine with overflow collector. It describes the peculiarities of ejection burners operation when they are installed on horizontal grate machine OK-108 with overflow collector.
Key words: horizontal grate machine, burning, prechamber, burner, torch.
Evaluation of the Possibility of Use of Carbon Containing Emulsions As Natural Gas
Druzhinin Gh. M., Zainullin L. A., Êushnarev À. V., Ovchinnikov Yu. N., Filatov S. V., Shaliaghin À. À.
Replacement of natural gas in domain fusion by other fuel additives is an actual problem. In article it is offered to use carbon containing emulsion (a coal dust, black oil, water) as additional fuel. Calculations of temperature modes of tuyere zones are executed, the estimation of change of regenerative potential of tuyere gas and heat exchange processes in the top part of the furnace is given. Technological possibility to use carbon containing emulsion as a substitute for natural gas is shown.
Key words: natural gas, carbon containing emulsion, fuel additives.
Analysis of Melt Circulation in a Solidifying Thin Steel Slab
Samoilovich Yu. À.
The piper describes the results of estimation of melt currents in steel core of hardening thin steel slabs when using two configurations of nozzle. The reliability of the analysis is provided by application of modern method of turbulence recording based on the two parameter model by Launder Spalding, as well as the universal finite element numerical method.
Key words: hardening thin steel slab, melt circulation, turbulence effect, Launder Spalding model.
Thermal Inspection of Operation of the Furnaces for Vanadium Pentoxide Melting
Alexeev Î. Gh.
The analysis of operation of heating furnace for vanadium pentoxide melting was made. Heating balance was made up, which allowed estimating the correlation of heat flows when melting vanadium pentoxide, as well as measuring the specific consumption of fuel. When melting vanadium pentoxide the useful heat equals 2.191 Gcal/h or 20.9 % of the total heat introduced. The specific fuel consumption by the furnaces equals 1.065 kg of equivalent fuel/kg of V2O5. The technical proposals on enhancement of vanadium pentoxide melting furnace efficiency are introduced.
Key words: melting furnace, vanadium pentoxide, heat balance, burner, specific fuel consumption.
Revamping of the Air Cooling Section in the Wire Rod Mill 150
Åvteev E. À., Klekovkin À. À., Podolsky B. Gh.
The paper addresses the main data and amount of modernization carried out on two lines of rod air cooling on 150 rolling mill at Beloretskii Metallurgical Plant, including the air blow off equipment replacement for more perfect one. It mentions the characteristics of the new equipment and describes the principles of its operation in the production of rod. The results of the reconstruction are shown, the assortment of the rod produced is expanded, its consumer
properties are improved.
Key words: rod, air cooling, modernization, assortment.
Experience in the Integrated Revamping of the Reheating Furnaces of the Omutninsky Steel Plant
Druzhinin Gh. Ì., Martynov À. P., Leontiev V. À., Ashikhmin À. À., Ìaslov P. V., Neliubin S. À.
The paper addresses complex modernization of heat treating furnaces in rolling mills at Omutninskyi Metallurgical Plant in connection with replacement of petroleum heating system by natural gas heating. It describes the results of operational tests carried out to determine efficient thermal conditions of metal heating and the main furnaces operation characteristics achieved.
Key words: heat treating furnaces, heating system, burner, operational tests.
Efficiency of the Regenerative Heating System of the Reheating Furnace
Druzhinin Gh. Ì., Loshkarev N. B., Ashikhmin À. À., Bartash M. R., Neliubin S. A.,Êîrobeinikov À. V.
The paper addresses the design and test results for high temperature heat treating furnace with regenerative burners. It is shown that application of heating system with high speed impulse burners allows maximum using of fuel warm directly in the space of the unit and uniform workpiece heating, as well as keeping the standards of harmful substances emissions.
Key words: heat treating furnace, heating system, regenerative burner, operational tests, heating uniformity.
Development and Putting into Operation the Site of Thermal Hardening of Reinforcement Bars in the Production Line of the Casting & Rolling System of the Rolling Mill 280
Lipunov Yu. I., Eismondt Ê. Yu., Miagkov Ê. À., Rzhevitsky S. N., Êlopov V. I., Dunaev V. À., Starikov Å. V.
The area of reinforced bars thermostrengthening in 280 rolling mill running was developed and put into operation at State Unitary Enterprise Lliteino Prokatny Zavod, Moscow. Complete development and delivery of the equipment was fulfilled by OJSC VNIIMT aided by OJSC KO VNIIMETMASH and CJSC ASK. The area equipment includes the reinforced bar thermostrengthening device (UTA) with distribution center of water and air supply system, processing table and pinch rolls, autonomous water supply system, and automated control systems. On the basis of the pilot batch analysis results the modes of thermostrengthening have been developed and production of thermostrengthened reinforced bars with À500Ñ strength index was mastered.
Keywords: reinforced bar thermostrengthening device, distribution center of water and air supply system, autonomous water supply system, process automation, thermostrengthening modes.
Heatk & CorrosionkResistant Ventilators
Êalganov V. Ì., Zainullin L. A., Êalganov Ì. V., Saveliev V. À., Êalganov D. V.
The forced-draft device for pumping chemically aggressive or high temperature gas media with improved operating ability is developed. Aerodynamical protection of welded seams and cooling of impeller external surface in form of these parts blow off with atmospheric air is carried out. The design of the forced draft device is recommended for pumping of non explosive chemically aggressive or high temperature gases (up to 600 – 650 îÑ) in various aggregates at metallurgical enterprises.
Key words: forced draft device; impeller; chemically aggressive high temperature gas medium.
Development of Controlled Cooling Systems and Thermal Hardening Techniques
Lipunov Yu. I., Traianov Gh. Gh., Eismondt Ê. Yu.
The paper reviews bench and industrial tests to study the regularities of heat exchange under conditions of water jet cooling and to establish the dependencies between heat emission and the operating and design parameters for different assortment of rolled stock, and practicable thermostrengthening methods. It describes the characteristics of the automated devices for plate controlled cooling in 5000 rolling mill and thermostrengthening of reinforcing bars with diameter of 25 – 40 mm in 350 rolling mill, which were developed at OJSC VNIIMT and put into operation at OJSC Severstal.
Key words: thermostrengthening in rolling mill, controlled cooling, rolled plate, reinforcing bars, process automation.
Certain Ways of Improvement in the Thermal and Ecological Values of Operation of Sintering Machines
Gherasimov L. Ê., Dobriakov Gh. Gh., Druzhinin Gh. Ì., Chistopolov V. À., Khammatov I. Ì.
The paper addresses the results of industrial installations operation for utilization of agglomerate cooling heat and agglomeration gas recirculation, constructed according to requirement specification of OJSC “VNIIMT”. Heat utilization units perform the intake of the air heated when agglomerate is cooled and its supply to the burners of ignition hearth and to the shelter behind it. Fossil and gas fuel saving was 5.4 – 6.5 kg of conventional fuel (160 – 190 MJ) for ton of agglomerate, the increase of the agglomachine efficiency was 1.6 – 2.7 %. Agglomeration gas recirculation units perform intake the smoke in front of the pipe with supplying it into the layer. This allows reducing of process gas and dust emissions into the atmosphere by 28 % and reducing of fossil fuel consumption by 3.6 kg of conventional fuel (105 MJ) for a ton of agglomerate.
Key words: agglomerate, sintering machine, recirculation, heat, standard fuel, unit, utilization.
Facility for Production of Hydrogen of Natural Gas and Water Steam
Klyshnikov S. Ò., Kukuy B. Gh., Waisblat P. Ì., Ìàximov I. S., Êîtelnikov À. B.
An installation with capacity of 250 ncm/h was developed to obtain hydrogen from natural gas and water vapor. The installation consists of a tube furnace, a medium temperature conversion unit, a distillatory demineralizer, heat exchangers, and a converted gas purification unit. A unit module of the installation with converted gas output up to 100 ncm/h was built. The unit has passed qualification tests. The correspondence between the estimated performance and the unit characteristics determined experimentally was established.
Key words: hydrogen, vapor conversion, tube furnace, medium temperature conversion unit, distillatory demineralizer.
Experience in Operating Production Devices of Fire Suppression of Iron Containing
Podkovyrkin Å. Gh., Zhukov Yu. S., Korshunova N. Gh., Bakov À. V., Vitkov Î. À.
The paper describes the flowsheet of unit for fire processing of oil containing anthropogenic wastes including rolling mill scale. The specific scale output is 10-20 times greater than that of a rotary kiln. The residual oil in the scale is 0.4 – 0.5 %. The unit is set in operation at OJSC Revdinsky Plant for nonferrous metal treatment, ÎÎÎ Spetssplav Ì, and OJSC Sinarsky Pipe Plant.
Key words: oily scale, shavings, oil containing anthropogenic waste processing.
Improvement in the Heating System & Design of Shaft Furnaces for Limestone Calcination
Riazanov V. Ò., Madison V. V., Dorokhin À. S., Shulghin S. S.
The paper describes the authors’ work on improvement of counterflow shaft furnace heating scheme, heating systems, burners and gas0distributing devices, control procedures, introduced in reconstructed and new furnaces with production of lime meeting modern requirements to quality characteristics with high economical and ecological parameters of the process (the content of (ÑàÎ + MgO)act in lime is 92 – 96 %, overburning is not more than 1 %, content of CO and NOX in combustion gases is substantially below the acceptable values).
Key words: shaft furnace, limestone calcining, lime, heat exchange, gas dynamics, heating system, burner, reconstruction.
New Fast Speed Recuperation Gas Burner for Direct Heating of Metal in Industrial Furnaces
Bartash Ì. R., Druzhinin Gh. Ì., Loshkarev N. B., Popov À. B., Khammatov I. Ì.
A new design of high speed recuperative burner is introduced, which allow burning of natural gas efficiently in two stage mode. It decreases ÑÎ and NOx content in combustion products emitted into the operating space at the rate of about 150 m/s. The burner heats the air for burning up to 700 – 750 °Ñ at a temperature of 1000 – 1100 °Ñ in the operating space of the furnace. The burner excels considerably its known analogues in these characteristics.
Key words: burners, built in recuperator, gas movement organization, heat exchange
intensification, fuel saving.
Development and Implementation of Burners with Controlled Jet Characteristics in Copper Melting Furnaces
Vintovkin À. À., Dengub V. V., Vitkov Î. À., Vegner B. B., Voronov Gh. V., Ustinov S. Ì.