SU779402A1

SU779402A1 - Tuyere

Info

Publication number: SU779402A1
Application number: SU782641112A
Authority: SU
Inventors: Иван Иванович Кобеза; Инна Даниловна Усачева; Юрий Феодосьевич Воронов; Анатолий Васильевич Гребенюков; Владимир Иванович Беличенко; Александр Александрович Карпенко
Original assignee: Институт Черной Металлургии Министерства Черной Металлургии Ссср
Priority date: 1978-07-10
Filing date: 1978-07-10
Publication date: 1980-11-15

Description

(54) ФУРМА(54) FURMA

. , -1. , -one

Изобретение относитс к металлургии и может быть использовано при выплавке стали в подовых печс1х.The invention relates to metallurgy and can be used in the smelting of steel in hearth furnaces.

Известны конструкции топливнокислородных фурм, используемых в подовых печах дл нагрева шихтовых материалов в период прогрева шихты и дл продувки жидкого металла в периоды плавлени металла и продувки pL .Constructions of fuel-oxygen tuyeres are known that are used in hearth furnaces for heating charge materials during the heating of the charge and for purging the liquid metal during the periods of metal melting and blowing of pL.

Наиболее близкой по технической сущности и достигаемому результату к предлагаемой вл етс фурма, содержаща концейтрично расположенные трубы, образующие тракты дл подачи топлива, окислител , подвода и отвода охладител , головку с ц антральным соплом дл подачи топлива и coijламй дл подачи окислител .З The closest in technical essence and the achieved result to the proposed is a tuyere containing laterally spaced pipes forming paths for fuel supply, oxidizer, coolant supply and removal, a head with a central anther nozzle for fuel supply and co-flame for supplying an oxidant.

Недостатком известной фурмЫ вл етс то, что топливо, подаваемое в центральное соплоj перемешиваетс только с частью, кислорода, поэтому эффективность от топливно- кислородной продувки мала. Б периферийной зоне вэаимодейст ви кислородных струй с металлом температура реакционной зоны будет оставатьс высокой, поэтому здесь будет значительным угар железа. Кроме того , таккак только часть кислорода подаётс по направлению центрального топливнсйо сопла, то и эффект защиты топливного сопла от засорени металлом и шлаком невелик. К тому же сход щиес в одной точке (вершине конуса) кислородные струи и топливна стру при продувке создают эффект подобный ТОМУ, что имеет местоA disadvantage of the known lance is that the fuel supplied to the central nozzle j mixes only with a part of oxygen, therefore the efficiency of the fuel-oxygen purge is low. In the peripheral zone of oxygen depletion of metal with metal, the temperature of the reaction zone will remain high, so there will be significant iron loss. In addition, since only part of the oxygen is supplied in the direction of the central fuel nozzle, the effect of protecting the fuel nozzle from littering with metal and slag is small. In addition, oxygen jets and a fuel jet at a single point (apex of a cone), when purging, create an effect similar to the VOLUME, which is the case

10 при работе фурмы с. центральной по- . дачей окислител , при которой очень велико разбрызгивание, металла.10 when working tuyere with. central-. The dacha is an oxidizing agent, at which spatter is very large, of metal.

Цель изобретени - интенсификаци процесса продувки металла и предотвращение засорени топливного сопла металлом и шлаком.The purpose of the invention is to intensify the process of metal purging and prevent metal and slag from clogging the fuel nozzle.

Цель .достигаетс тем, что фурма снабжена подвижным завихрителем,The goal is achieved by the fact that the lance is provided with a movable swirler,

20 выполненным, например, в виде подпружиненного шнека и расположенным в тракте дл подачи топлива, а сопла дл подачи окислител выполнены щелевыми, тангенциально направленными к составл ют с вертикальной диаметральной плоскостью фурмы Рггол ЮтвО. .20 made, for example, in the form of a spring-loaded auger and located in the path for supplying fuel, and the nozzles for supplying the oxidant are slotted, tangentially directed to, are made with the vertical diametrical plane of the lance Rgoll YutvO. .

На. фиг. 1 изображена фурма продольный разрез; на фиг. 2 - то жег On. FIG. 1 shows a tuyere longitudinal section; in fig. 2 - then burned

30 поперечный разрез.30 cross section.

Claims

779402 A lance muffles from four concentrically arranged pipes, one of which is Central 1, serves for supplying fuel, the other two 2 and 3 forms a path for supplying the oxidant, pipe 4 is the body of the tuyere. The pipes are connected to the head 5, which has a central fuel tank and several, for example, a rotary nozzle 7 for supplying an oxySteel. The nozzles 7 are directed tangentially, and YHDSy make an angle of 10-60 ° with the vertical diameter of the tuyere, a. In the path for fuel supply, there is a movable swirler made, for example, in the form of a spring-fed auger. Inside the central; nozzle nozzle, stops 9 are installed to limit the swirl and spring 10 operation. The lance works as follows: The central fuel nozzle 6 serves fuel, the flow of which is due to the movable swirl 8 into. Place the nozzle and at the exit twist it into slotted nozzles 7. the oxidizer is fed, at the outlet of the nozzle the oxidant jets acquire a tangential motion relative to the central fuel jet, and the outgoing jets of the oxidizer vigorously mix with the swirling fuel. This is achieved due to the fact that the auger is designed in such a way that the output of the fuel flow is directed in the same direction as the flow of oxygen streams, and mixing the top will be most effective; with an oxidizing agent, if the angle of encounter of the fuel noTipKa with the oxygen jets in the horizontal plane, is 10-30. Depending on the pressure of the fuel, the scout of a rider having a Pruug will change its location inside the fuel nozzle. During the heating of the charge pressure of fuel is maximal, Evirukhlitel is in the extreme low of the cc. The baths, when pumping the lance into the metal, reduce the fuel consumption, while the pressure of the pump decreases, the swirl changes its position, rises up to the stop level. With both in the auger and in the gas nozzle body, therefore the fuel pipe is hardened. The flow rate and pressure of the oxidizer during the etrth period are normal. Besides the nozzle, the oxidant supply is filled with gaps, it is both, it concentrates the oxidant supply, and As a result, a more powerful intersection of the acidic with the fuel, which is further enhanced by the tangential position of the Nozzles for the oxidizing agent. The sche configuration has also ensured the locking of the central fuel nozzle during the purge period, it improves the durability of the tuyere and tvraschaet chastyts metal slag ingress into the fuel nozzle. . The position of the nozzles of the oxidizer under the glom to the vertical diametrical plane of the FURMA ensures the intensive introduction of jets of acid into the fuel jet of THEIR with vigorous mixing of the mixture in the Metal. This solves the main task of fuel-oxygen {blow-down. - reduction of the temperature of the reaction zone and, as a result, of this reduction of the carbon loss of the metal. The lance is also used for carbonization of the metal. In this case, the purges reduce the supply of the oxidant in the filter, and the maximum amount of fuel is supplied through the fuel nozzle at the maximum pressure possible. At the same time, the separation temperature is in the lowermost range, which enhances the effect of the introduction of the fuel jet into the metal and the efficient use of carbon to hold carbon for carbon. Thus, the invention of the invention allows, by improving the organization of the tuyere torch, to speed up the process of heating and melting the charge, due to the improved mixing of the fuel with the oxidant during the bath purge period, to reduce the temperature of the reaction zone, therefore, to reduce the metal waste, and finally, by improving mass transfer increase the efficiency of blowdown. Claims of Invention FurMa containing concentrically distributed pipes forming paths for supplying fuel, oxidizer, supply and removal of the cooler, a head with a central nozzle for supplying fuel and nozzles for supplying an oxidizing agent with the aim of intensifying a metal purging process and preventing clogging of the fuel nozzle. metal and metal, the lance is equipped with a mobile scoop made, for example, in the form of a spring-loaded auger and deployed in the path for supplying fuel, and the nozzle for supplying the oxidizing agent are slotted, tangentially directed and are vertically