SU829324A1

SU829324A1 - Plant for refining liquid metal

Info

Publication number: SU829324A1
Application number: SU792743703A
Authority: SU
Inventors: Вячеслав Васильевич Шавров; Зоя Кузьминична Анчеева; Виктор Макарович Чурсин; Михаил Моисеевич Краснопольский; Виктор Васильевич Салохин; Николай Алексеевич Степанов; Владимир Александрович Ковригин
Original assignee: Предприятие П/Я В-2438
Priority date: 1979-03-30
Filing date: 1979-03-30
Publication date: 1981-05-15

Description

Изобретение относится к литейному производству, а именно к устройствам для непрерывного рафинирования жидких металлов и сплавов, и может быть использовано для перемешивания металла с различными добавками.The invention relates to foundry, and in particular to devices for the continuous refining of liquid metals and alloys, and can be used for mixing metal with various additives.

Наиболее близким по технической сущности к предлагаемому является устройство, предназначенное для рафинирования жидких металлов продувкой инертным газом, содержащее емкость в виде барабана с приводом для вращения его вокруг горизонтальной оси и систему подвода газа, состоящую из го- 15 ризонтально установленной центральной трубки с отводными параллельными патрубками, расположенными по всей длине трубки и направленными под углом 30-60° к вертикальной плоскости, 20 проходящей через продольную ось емкости. С помощью устройства производится очистка жидких металлов от окисных плен и водорода при пониженном расходе инертного газа [1]. 25The closest in technical essence to the proposed one is a device designed for refining liquid metals by inert gas purging, containing a container in the form of a drum with a drive for rotating it around the horizontal axis and a gas supply system consisting of a horizontally mounted central tube with parallel branch pipes located along the entire length of the tube and directed at an angle of 30-60 ° to the vertical plane 20 passing through the longitudinal axis of the tank. Using the device, liquid metals are purified from oxide captures and hydrogen at a reduced inert gas flow rate [1]. 25

- Однако это устройство не обеспечивает непрерывности рафинирования. Цель изобретения - обеспечение непрерывного рафинирования расплавов продувкой. 30- However, this device does not provide continuous refining. The purpose of the invention is the provision of continuous refining of the melts by blowing. thirty

Эта цель достигается тем, что установка для рафинирования жидкого металла содержит емкость с приводом для вращения ее вокруг продольной оси и системы подвода газа,состоящую из горизонтально установленной центральной трубки с отводными параллельными патрубками, расположенными по всей длине трубки и направленными под углом 30-60° к вертикальной плоскости, проходящей через продольную ось емкости, которая выполнена в виде усеченного конуса, нижняя образующая которого расположена горизонтально, а в центре обоих оснований конуса Выполнены отверстия.This goal is achieved in that the installation for refining liquid metal contains a tank with a drive for rotating it around the longitudinal axis and a gas supply system, consisting of a horizontally mounted central tube with parallel branch pipes located along the entire length of the tube and directed at an angle of 30-60 ° to a vertical plane passing through the longitudinal axis of the tank, which is made in the form of a truncated cone, the lower generatrix of which is horizontal, and in the center of both bases of the cone miles.

На фиг. 1 изображена схема установки, вид спереди, разрез; на фиг. „2 - сечение А-А на фиг. 1.In FIG. 1 shows an installation diagram, front view, section; in FIG. „2 - section AA in FIG. one.

Устройство состоит из емкости в виде усеченного конуса 1, центральной трубки 2, отводных патрубков 3, расположенных по всей длине трубки и направленных под углом 30-60° к вертикальной плоскости, проходящей через продольную ось емкости, электродвигателя 4 и катков 5. Заливочное окно б выполнено в центре большого основания, а разливочное 7 - в центре малого основания конуса. У заливочного окна установлена летка миксера 8, а у разливочного - кристаллизатор 9.The device consists of a tank in the form of a truncated cone 1, a central tube 2, branch pipes 3 located along the entire length of the tube and directed at an angle of 30-60 ° to a vertical plane passing through the longitudinal axis of the tank, electric motor 4, and rollers 5. Filling window b performed in the center of the large base, and casting 7 - in the center of the small base of the cone. At the pouring window, a notch of mixer 8 is installed, and at the pouring window, a mold 9 is installed.

Емкость выполняется в виде усеченного конуса и располагается таким образом, что продольная ось конуса расположена наклонно и образующая усеченного конуса, находящаяся ниже его продольной оси в вертикальной плоскости, проходящей через эту ось,· расположена горизонтально, чтобы глубина ванны металла на всем протяжении емкости при заполнении ее имела одинаковую величину, что обеспечит наилучшие условия очистки металла.The container is made in the form of a truncated cone and is positioned in such a way that the longitudinal axis of the cone is inclined and the generatrix of the truncated cone located below its longitudinal axis in the vertical plane passing through this axis is horizontal so that the depth of the metal bath throughout the container during filling it had the same value, which would provide the best conditions for metal cleaning.

Устройство работает следующим образом.The device operates as follows.

Из летки миксера 8 расплав через заливочное окно 6 постоянно поступает в емкость 1. По центральной трубке 2 подается инертный газ и одновременно электродвигатель 4 через катки 5 приводит во вращение емкость 1 в сторону, противоположную отклонению отводных патрубков от вертикальной плоскости. Инертный газ, поступающий в толщу металла из отводных патрубков 3, поднимаясь вверх, встречает все новые слои жидкого металла, которые поступают на поднимающиеся пузырьки инертного газа. Скорость движения пузырька относи тельно уровня металла при этом очень мала, что позволяет инертному газу находиться в толще металла достаточно продолжительное время, необходимое для полного насыщения пузырьков инертного газа водородом металла.From the notch of the mixer 8, the melt through the pouring window 6 constantly enters the container 1. Inert gas is supplied through the central tube 2 and at the same time the electric motor 4 through the rollers 5 rotates the container 1 in the direction opposite to the deviation of the branch pipes from the vertical plane. Inert gas entering the thickness of the metal from the branch pipes 3, rising up, meets all new layers of liquid metal, which enter the rising bubbles of inert gas. In this case, the velocity of the bubble relative to the metal level is very low, which allows the inert gas to be in the bulk of the metal for a sufficiently long time necessary for the saturation of the inert gas bubbles with metal hydrogen.

Металл за время протекания по емкости рафинируется продувкой инерт ным газом и через разливочное окно '1 поступает в кристаллизатор 9.During flowing through the tank, the metal is refined by inert gas purging and through the casting window '1 it enters the mold 9.

Таким образом, в предлагаемой установке обеспечивается непрерывность рафинирования металла за счет выпол5 нения емкости в виде усеченного кону са с горизонтально расположенной нижней образующей. Кроме того, такое расположение емкости обеспечивает одинаковую толщину ванны металла по ί q всей длине емкости, что создает опти мальные условия для очистки металла. При этом сохраняется низкий расход инертного газа.Thus, the proposed installation ensures the continuity of metal refining due to the performance of a container in the form of a truncated cone with a horizontally located lower generatrix. In addition, this arrangement of the container ensures the same thickness of the metal bath along ί q over the entire length of the container, which creates optimal conditions for metal cleaning. At the same time, a low inert gas flow rate is maintained.

Claims

The invention relates to a foundry, namely, devices for continuous refining of liquid metals and alloys, and D.PN can be used for mixing metal with various additives. The closest in technical essence to the present invention is 1 device intended for refining liquid metals by purging with an inert gas, containing a drum-like container with a drive for rotating it around a horizontal axis and a gas supply system consisting of a horizontally installed central tube with parallel branch pipes located along the entire length of the tube and directed at an angle 30 to the vertical plane passing through the longitudinal axis of the vessel. With the help of the device, the production of liquid metals is carried out from oxide films and hydrogen at a reduced flow rate of inert gas l. However, this device does not provide a continuity of refining. The purpose of the invention is to provide continuous refining of melts by blowing. This goal is achieved by the fact that the installation for refining liquid metal contains a tank with a drive for rotating it around the longitudinal axis and a gas supply system consisting of a | Horizontally installed central tube with parallel branch pipes arranged along the entire length of the tube and directed at an angle of 30 60 ° to the vertical plane passing through the longitudinal axis of the vessel, which is made in the form of a truncated cone, the lower forming of which is located horizontally, and in the center of both bases of the cone we have holes. FIG. 1 shows the installation diagram, front view, section; in fig. , 2 - section A-A in FIG. 1. The device consists of a tank in the form of a truncated cone 1, a central tube 2, branch pipes 3, located along the entire length of the tube and directed at an angle of 30-60 to the vertical plane passing through the longitudinal axis of the tank, electric motor 4 and rollers 5. Filling Window 6 is made in the center of a large base, and casting 7 - in the center of a small base of the cone. At the casting window, a mixer tap 8 is installed, and at the pouring one - a mold 9. The container is made in the form of a truncated cone and is positioned in such a way that the longitudinal axis of the cone is located obliquely and forming a truncated cone located in a vertical plane below its longitudinal axis trough this axis is located horizontally so that the depth of the metal bath throughout the capacity of the tank when it is filled has the same value, which provides the best conditions for cleaning the metal. la The device works as follows. From the tap hole of the mixer 8, the melt through the filling window 6 constantly enters the tank 1. An inert gas is fed through the central tube 2 and at the same time the electric motor 4 rotates the tank 1 in the direction opposite to the deviation of the outlet nozzles from the vertical plane. The inert gas entering the thickness of the metal from the branch pipes 3, lifting up, encounters all new layers of liquid metal, which enter the rising bubbles of the inert gas. The velocity of the bubble relative to the level of the metal is very small, which allows the inert gas to be in the bulk of the metal for a sufficiently long time required to completely saturate the bubbles of the inert gas with the metal hydrogen. The metal during the flow through the vessel is refined by inert gas purging with gas and through the casting window 1 enters the mold 9. Thus, the proposed plant ensures the continuity of metal refining by making the vessel in the form of a truncated cone with a horizontal lower generatrix. In addition, such an arrangement of the vessel provides the same thickness of the metal bath along the entire length of the vessel, which creates optimal conditions for cleaning the metal. At the same time, the inert gas flow rate is kept low. The invention The apparatus for refining liquid metal, containing a tank with a drive, for rotating it around the longitudinal axis and a gas supply system consisting of a horizontally installed central tube with parallel branch pipes arranged along the entire length of the tube and directed at an angle of 30-60 ° to a vertical plane passing through the longitudinal axis of the tank, it is about that in order to ensure continuous refining of melts by blowing, the tank is made in the form of a truncated cone, the bottom forming of which is located horizontally, with holes being made in the center of both bases of the cone. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 679304, cl. B 22 D 11/10, 1978.

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