JPH02303653A - Treatment of molten metal and apparatus - Google Patents

Abstract

PURPOSE: To efficiently execute the refining treatment of molten metal by supplying granular treating agent and gas into a hollow rotor through a hollow shaft, mixing with the molten metal in the rotor and dispersing into the molten metal in a vessel. CONSTITUTION: The shaft 1 has a penetrated hole 3 and the rotor 2 is divided into four sections 10 with blades 13. The rotor 2 is inserted into a ladle and rotated and the granular treating agent and the gas are supplied into a manifold 8 in the rotor 2 through the hole 3 of the shaft 1. The molten metal is sucked into the manifold 8 through the opening part at the lower part of the rotor and the flow of the granular treating agent and the gas is pulverized and sufficiently mixed. The produced dispersed material is discharged from the peripheral outlet 12 through the inlet 11 and the section 10 and dispersed into the whole molten metal. The treatment for removing hydrogen or alkaline elements from aluminum (alloy) is efficiently executed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for processing molten metal.

Various rotary devices have been proposed for introducing gas into molten metal to perform processes such as removing hydrogen from aluminum or aluminum alloys, or removing alkali elements from aluminum alloys. .

One such device is European Application Publication No. 0332
No. 292A. The device is made of a hollow shaft and a hollow rotor connected to the shaft. The rotor includes a plurality of blades extending from the shaft toward the circumference of the rotor and dividing the hollow interior of the rotor into a plurality of compartments. Each compartment has an inlet near the shaft and an outlet near the periphery of the rotor. The lower end of the shaft opens into a manifold within the rotor, and the inlet of the compartment is located within the wall of the manifold. When the device is rotated in molten metal, the molten metal is drawn into a manifold where it crushes the gas stream exiting the shaft into very small bubbles. The gas bubbles are dispersed in the molten metal and the dispersion flows into the compartment through an inlet in the manifold wall, through the compartment and out of the rotor via peripheral outlets. The gas is thus dispersed throughout the molten metal.

US Pat. No. 4,802,656 describes an apparatus for dissolving alloying elements and dispersing gases into molten aluminum. The patent refers in its preamble to a known gas dispersion device and states that the dispersion device is a device that cannot be used for dissolving alloying elements in molten metal. The device described in that patent consists of a vertical shaft passing axially through a duct and connected to a gas source and a drive motor, and a rotor or disk having the same axis as the shaft. be. The disk is equipped with vanes that extend along the generatrix of a right prism with a parallelogram cross-section, the axis of which passes through the center of the disk, and the edges of the disk support the side walls of the disk. Starting from the intersection of the cylinder and the coaxial cylinder and the above-mentioned right prism, the large face of the right prism makes an angle of up to 45 degrees with the horizontal direction, and the small face is located in the plane of the top and bottom surfaces of the disk, respectively. The vane includes at least one orifice connected to a duct in the shaft by a tubular passage. When using,
The disk is immersed in the molten metal and rotated, and gas is introduced into the duct of the shaft. A hopper located above the bath feeds alloying additives into the molten metal adjacent to the shaft.

Surprisingly, European patent publication number 033229
A rotating device similar to the device described in 2A can be used to treat molten metal with a solid treatment agent by mixing the treatment agent particles into a gas flow that passes through a shaft and into a rotor. There was found.

According to the present invention, a method for treating molten metal with a particulate treatment agent and a gas is provided, which method comprises a rotating device comprising a hollow shaft having a discharge end and a hollow rotor attached to the shaft. the rotor has a plurality of vanes, each vane extending from or near the shaft toward the periphery of the rotor, the hollow interior of the rotor being divided into a plurality of compartments, each compartment being adjacent to the shaft. The rotor has an inlet and an outlet near the periphery of the rotor, the rotor having a mechanism for passing the particulate treatment agent and gas from the discharge end of the shaft into the compartment, and having a rotating device into the molten metal in the vessel. immersion, rotating the device to introduce molten metal into the compartment through the inlet, supplying a particulate treatment agent for the molten metal and gas to the shaft, and supplying the particulate treatment agent and gas into the compartment from the discharge end of the shaft. It is characterized in that it emerges, enters a compartment, mixes with the molten metal in the rotor, and, as it emerges from the rotor, becomes dispersed in the molten metal contained in the container.

According to yet another feature of the invention, an apparatus for treating molten metal with a particulate treatment agent and a gas is provided, the apparatus comprising: a container; and a particulate treatment within the molten metal contained in the container. It consists of a rotating device for dispersing the agent and gas, and a mechanism for supplying the particulate treatment agent and gas to the rotating device, in which the rotating device has a hollow shaft with a discharge end and a shaft. The rotor has a plurality of blades, each blade extending from the shaft or a position close to the shaft toward the circumference of the rotor, and the hollow interior of the rotor is divided into a plurality of compartments. wherein each compartment has an inlet near the shaft and an outlet near the periphery of the rotor, the rotor having a mechanism for passing the particulate treatment agent and gas from the discharge end of the hollow shaft to the compartments; This is a characteristic feature.

In a preferred embodiment, the rotating device is as described in European Patent Application Publication No. 0332292A, comprising a rotor having a manifold, an inlet of a compartment in the wall of the manifold, and a rotor having a lower end in the manifold. It may also have a shaft that opens into the shaft.

The rotor of the rotating device may be made separately from and attached to the shaft, or the rotor may be made integrally with the shaft.

The rotor is preferably circular in cross-section in order to reduce resistance in the molten metal when the device rotates and to keep the overall weight of the rotor as low as possible.

A rotor has two or more blades, thus two
It may have one or more compartments. Preferably at least 3 vanes and therefore at least 3 sections;
Four was found to be a convenient number in practice. Although vanes extend from the shaft around the rotor, the vanes may be added to the shaft or may be made integral with the shaft. The vanes may extend radially or tangentially to the shaft.

In use, the shaft is connected to the drive mechanism by a drive shaft, or directly at the upper end of the shaft, or by the lower part of the rotor at the lower end of the shaft.

The rotating device is disclosed in European Patent Application No. 0332292
When the device is of the type described in Publication A, when the device rotates in molten metal, the molten metal is drawn into the manifold of the rotor, so that the metal is drawn into the manifold at the outlet of the shaft. pulverizing the flow of particulate treatment agent and gas emanating from the Very small bubbles of gas and particulate treatment agent mix well with the molten metal and the resulting dispersion flows into the compartment through inlets in the manifold wall and out through peripheral outlets. , dispersed throughout the molten metal.

The flow pattern of the molten metal and gas/particulate treatment agent mixture exiting the rotor into the molten metal body is determined by the rotor's internal geometry. In practice, it is preferred to locate the rotating device as close to the bottom of the vessel as possible so that the molten metal, gas, and particulate treatment agent exit the rotor in a substantially horizontal direction. This can be achieved, for example, by leveling the edge or the whole of the upper surface of the lower end of the rotor, and possibly by leveling the edge of the lower surface of the upper end of the rotor.

The rotating device of the apparatus according to the invention provides an effective mechanism for dispersing the particulate treatment agent and gas in the molten metal and for distributing them into a large body of molten metal. ing.

The rotating device can be made of graphite, silicon carbide or ceramic materials that are inert to molten metal.

The vessel used to carry out the method of the invention may be, for example, a ladle used for processing molten metal in a batch process, or the vessel may be, for example,
It may also be of special construction, such as that described in US Pat.

The mechanism used to supply the particulate treatment agent and gas to the rotating device will vary depending on the particle size of the particulate material being used.

For relatively fine particles on the order of 1 fl or less, a hopper with a gas injection nozzle can be used. However, the preferred mechanism for such particles is a device that fluidizes the particulate treatment agent with a gas to form a dispersion, which is connected by pipe to a borehole in the shaft of a rotating device.

Such devices have a closable inlet at the upper end for entering the particulate treatment agent and a primary inlet near the lower end for introducing a gas such as argon or nitrogen, e.g. to fluidize the particulate treatment agent. consisting of a container with multiple spouts for spouting gas and a valve at the lower end through which the dispersion passes as it passes into the pipe connecting this device and the rotating device. It is. The device further includes: to reduce the concentration of particulate treatment agent in the dispersion;
It has a secondary inlet for the gas introduced into the dispersion and an outlet through which excess gas exits the container and is connected to a vibrator connecting the device to the rotating device. Good too. The rate of exit of the particulate treatment agent can also be controlled by the exit rate of gas through the secondary inlet, which can be controlled by providing a container above the scale on the deck.

Preferably, the particulate treatment agent consists of particles with a size of 1 fl or less, and more preferably with a size of 0.151aI to 0.8B.

Preferably, the length to width ratio of the particles is less than or equal to 2.0:1, and more preferably ranges from 1:1 to 175:1. Particles with the desired shape and size are
It can be made by forming the processing agent into tablets and crushing the tablets.

It is difficult and inconvenient to produce particles of the above-mentioned shape and size with processing agents of the type described above, such as the so-called master alloys used to refine aluminum and its alloys. . Therefore, it is desirable to use treatment agents in the form of larger particles in the form of droplets, on the order of 5 fl or more, more preferably on the order of 6-10 m.

The mechanism used to introduce these relatively large particles into the rotating device is preferably a specially constructed hopper connected to a borehole in the shaft of the rotating device.

The hopper, mounted on a rotating device, preferably having the shape of an inverted cone, has a sealed top surface overlooking a closable inlet for the treatment agent particles, and has a hole in its lower part communicating with a tube, which introduces the gas. It has one or more holes for the rotation and is provided in the bore of the shaft of the rotating device. The hopper @wall has at least one row of circumferentially spaced holes near its bottom, each hole having a sliding member projecting through the side wall and into the hopper, the sliding member being a part of the hopper. It is connected to a device such as a compressed air cylinder mounted on the outside to slide the sliding member towards or away from the longitudinal axis of the hopper. The hopper has two or more rows of holes and sliding members located apart in the circumferential direction, and the holes and sliding members of one row of the holes and the sliding member of the other Preferably, it is located above and intermediate the row of holes and the sliding member. Preferably, each row consists of three holes and a sliding member. In use, the slide members are preferably actuated such that each row of slide members is actuated one after the other to alternately open or close the spaces above and below each slide member. As a result, the sliding member accelerates the large particles of processing agent so that the particles always uniformly enter the rotating device. The frequency with which the sliding member is actuated can vary depending on the size and density of the particles used.

In a preferred embodiment, a tube connected to the lower end of the hopper passes through a lower block at the lower end of the hopper.
It reaches into the borehole of the shaft of the rotating device. The block has a plurality of ducts which are preferably inclined downwardly towards the rotating device and which communicate with the interior of the tube by holes in the tube wall. In use, gas is forced into the tube through the duct, and the action of the gas generates a positive pressure that increases the p-
This prevents molten metal from entering the gas gocket and ensures that processing agent particles always fall into the gas gocket.

The device also includes a mechanism for introducing and controlling the flow of gas from the hopper into the shaft of the rotating device in the space outside the tube, and either directly or via a drive shaft.
It also includes a gear-like mechanism driven by a fan belt to drive the shaft of the rotating device.

As the rotating device rotates through the molten metal, the metal is sucked up by the rotor and treatment agent particles and gas are mixed with the metal within the rotor.

The method and apparatus according to the invention are used to treat various molten metals with a particulate treatment agent, such as aluminum and its alloys, magnesium and its alloys, copper and its alloys, iron or steel. Used to process ferrous metals.

The gas used with the particulate treatment agent may be inert or may be reactive with the metal being treated. Examples of gases that can be used are chlorine, argon and nitrogen.

Examples of treatment agents that can be used in particulate form are fluxing agents such as mixtures of alkali metal chlorides for aluminum or aluminum alloy treatment, and single or mixtures of alkali metal fluorides, borium fluorides, etc. a mixture of potassium chloride and potassium fluoride titanium salt;
or refining agents such as alloys for refining the grain structure of aluminum and its alloys, alloy additives for ferrous or non-ferrous metals, mixtures of lime and calcium carbide,
or desulfurizing agents such as magnesium for desulfurizing iron, or calcium silicide for desulfurizing steel;
Includes compositions for changing the structure of graphite within cast iron, such as compositions for making spheroidal graphite iron or vermicular graphite iron.

The method and apparatus are particularly useful for adding refiners or modifiers to aluminum or aluminum alloys, allowing otherwise unremarkable materials to be used as treatment agents, such as strontium. The metal is
The pulverized particles can be used as a modifier in place of the strontium-containing alloy used in -II, and the commonly used ones, such as 15
An alloy containing % titanium and 2% boron by weight is
It can be used as a refiner.

The rotor size, rotor speed and gas flow rate are generally as described in European Patent Publication No. 0332292A, and the flow rate of the particulate treatment agent is determined by the size of the container containing the metal to be treated. Depending on the situation, it is usually about 0.5 to 2 kg per minute.

The present invention will be explained in more detail by way of example with reference to the accompanying drawings, in which FIG. 1 is a bottom view of a rotor for a rotating device used in the method and apparatus according to the present invention. FIG. 2 is a vertical cross-sectional view of the rogue of FIG. 1 in combination with a shaft; FIG. 3 is a schematic diagram of an apparatus according to the invention for treating molten metal with gas and relatively small treatment agent particles. FIG. 4 is a schematic vertical sectional view of a portion of an apparatus according to the invention for introducing gas and relatively large treatment agent particles into molten metal.

Referring to FIGS. 1 and 2, a rotating device for treating molten metal with a dispersion of particulate treatment agent in a gas consists of a shaft 1 and a rotor 2. FIG. The shaft 1 has a bored hole 3 passing through it, and a screw is attached on the inside.
The receiver accommodates a part of the lengthwise direction of the tube-shaped connecting piece 4 which has a thread on the outside. The rotor 2 consists of a generally disc-shaped or dish-shaped body with a circular upper surface 5 from which an underlying circular wall 6 extends. The center of the top surface 5 includes an internally threaded socket 7 for receiving the lower threaded portion of the connecting piece 4.

The lower part of the socket 7 is open and forms a manifold chamber 8 , and the connecting piece 4 is provided with a boring hole 9 .
has the same diameter as the diameter of the shaft bore 3, which opens into the manifold 8. Wall 6 includes four compartments 10 extending from the interior of wall 6A to the exterior of wall 6B, which forms the edge of the rotor body. Each compartment 10 has an inlet hole 11 in the wall 6A.
It also has an outlet in the form of a long pore 12 at the edge of the rogue. Adjacent compartments 10 are separated by vanes 13. The wall 6 forms the wall of the manifold chamber 8. Shaft 1 is a hollow drive shaft (not shown)
The upper end of the drive shaft is connected to a drive device such as an electric motor (not shown), and the hollow drive shaft of the borehole 3 allows the gas and the particulate treatment agent to be connected to the B (not shown). is connected to.

In use, the rotating device is placed within a ladle or other container containing molten metal. When the apparatus is rotated, the particulate treatment agent and gas descend through the borehole 3 in the shaft 1 and exit through the borehole 9 in the upper end of the manifold 8.

As the apparatus rotates, the molten metal is drawn through the lower opening into the manifold 8, where it breaks up the stream of particulate treatment agent and gas exiting the shaft 1, causing very small gas The foam and treatment agent particles are well mixed with the molten metal. The generated dispersion passes through the inlet 11 to the i! 10 and through the compartment 10 to the peripheral outlet 1
2 and dispersed throughout the molten metal.

Referring to FIG. 3, the apparatus for treating molten metal with a particulate treatment agent dispersed in gas includes a ladle 21, a rotating device 22, and a particulate treatment agent dispersed in gas. It consists of a device 23 for making and providing.

The device 23 is a pressurized vessel with a closable inlet 25 at the top end and a primary port 27 and a valve 26 for passing a gas such as argon or nitrogen at the bottom end for entering the particulate treatment agent. It consists of 24 parts. A plurality of spouts 28 are disposed on the outside of the container 24 adjacent to the inner surface of the lower end. The secondary gas inlet consists of a vibrator 29, and the container 25 has an outlet 30 near its upper end.

Both the vibrator 26 and the outlet 30 are connected to a vibrator 33 by means of vibrators 31 and 32, which in turn is connected to the rotating device 22. The container 24 is placed on a weight scale 34 on a stand 35.

The rotating device 22 consists of a hollow shaft 36 and a rotor 37, which may for example be of the type shown in FIGS. is connected to the lower end of a hollow drive shaft 39, and the inner diameter of the shaft 39 corresponds to the inner diameter of the vibrator 33. The drive shaft 39 is housed in a housing 41 and driven by an electric motor 40 , the zero rotation device 22 , the drive shaft 39 and the electric motor housing 41 are lifted by a lever system 42 and moved into the ladle 21 by a chain or screw drive cylinder 43 . All of these are lowered by the zero rotation device 2 installed on a movable platform 44.
A buffer plate 45 is fixed to the lower end of the housing 41 parallel to the shaft 36 to prevent vortices from forming when the housing 2 rotates in molten metal. The three-passage rotary valve 46 is
Vibrator 33, drive shaft 39, and another vibrator 47
and the vibrator 47 is connected to a gas source so that the device can be used only for degassing.

In use, the rotating device rotates the molten metal 48, such as the ladle 21.
The particulate treatment agent is lowered into the molten aluminum alloy placed in the container 2 and rotated so that the molten metal is sucked up by the rotor 37 through the inlet 25 into the pressurized container 2.
A gas such as nitrogen or argon, coming from a source not shown, is introduced into the vessel 24 through the inlet 27 and through the spout 28 to fluidize the particulate treatment agent. Additional gas is also introduced into the container 24 from the inlet vibe 29 . Excess gas exits exit 3
0, exits the container 24, passes through the vibrator 32, and enters the vibrator 33.
together with the fluidized dispersion of particulate treatment agent, passes through the valve 26 and the vibrator 31 and enters the vibrator 33. Thereafter, the dispersion is transferred to the valve 46, the drive shaft 39,
It flows through the shaft 36 of the rotating device and into the rotor 37 where it mixes with the molten metal being forced up into the rotor 37.

Referring to FIG. 4, a hopper 51 for introducing relatively large particles (i.e. 1 m or more) of processing agent into the rotating device.
has a sealed top surface 52 with a closable inlet 53 and a hole 54 at the bottom end 55 for adding particles to the hopper 51.

The hopper 51 has, near its lower end 55, two rows of three sliding members 56.57, which pass through holes in the side wall 55 and carry compressed air in the cylinder 59.60. driven by. Sliding members 56.57 in each row
are located at equal distances around the hopper 51, and the sliding member 56° is located above and between the sliding member 57. A hole 54 in the lower end 55 of the hopper 51 is connected to a tube 61 that extends downwardly within a bore 62 of the drive shaft 63.

The tube 61 passes through a block 64 attached below the hopper 51, and the block 64 has a plurality of ducts 65, which communicate with the inside of the tube 61 through holes 66. The block 64 is connected to a three-passage sealed valve 67, which includes a bearing and washer 68 for the shaft 63.
It has a hole 69 for introducing gas into the bore hole 62 of the cylinder. The WA drive shaft 63 is driven by a gear 70 connected to an electric motor (not shown) by a fan belt (not shown), and at its lower end a rotating device such as that shown in FIGS. 1 and 2, for example. (not shown)
connected to the shaft.

In use, the rotary device is lowered into the molten metal contained in the vessel, and the hopper 51, block 64, three-way rotary valve 67 and gear are connected to the vessel by supports 71 mounted on the frame (not shown). supported on the top surface. The processing agent particles are introduced into the hopper 51 via an inlet 53 which is sealed. Gas coming from a source not shown is admitted into the tube 61 through a duct 65 in a block 64. The sliding members 56 , 57 are moved alternately back and forth toward and away from the vertical axis of the hopper 51 , thereby accelerating the particles in the hopper 51 and moving the particles one by one into the tube 61 . Let it fall one by one. Gas from a source not shown is passed through bore 69 in valve 67 and into bore 62 of drive shaft 63 .

When electricity is applied to the electric motor, the rotating device is rotated by the gear 70, and the molten metal is sucked up by the rotor.
It mixes with the gas and treatment agent particles entering the rotor from drive shaft 63 and tube 61.

The following examples serve to illustrate the invention.

Example 1 A device similar to that shown in FIG. 3, but with the addition of an extra rotating device supported by a ladle, was constructed using an aluminum-silicon alloy containing 10% magnesium. It was used to improve the The rotor used was of the type shown in FIGS. 1 and 2.

The improved treatment agent used was particles of 1 yen or less in size made by crushing a molded double-left containing approximately 50% sodium carbonate and magnesium.

While rotating the rotor at a rate of 400 times per minute,
Molten alloy 20 was heated at a temperature of 790"C with 80g of particles suspended in argon gas at a rate of Log per minute.
It was press-fitted into kg.

Samples of the modified alloy were taken at various times and examined by standard thermal analysis techniques to evaluate the modified structure, and the diblefusidin parameter (d
expression parameters) were measured. Using this technique, the larger the diblefcidin parameter, the finer the size of the silicon crystals in the alloy, and therefore the greater the degree of improvement.

The results obtained were as follows.

Elapsed time Dive reflexology parameters 2 minutes 9X 10 minutes 9" 20 minutes 8.5 This improved the same alloy at the same temperature. The sample taken 2 minutes after modification had a depression run parameter of 7.5'', and the sample taken 10 minutes after modification had a depression run parameter of 7''.

Example 2 Using the same equipment, aluminum-silicon alloy, and modifier as in Example 1, 40 g of particles were pumped at a flow rate of 8 g per minute, with the rotor rotating at 400 rpm, at 770 rpm.
It was press-fitted into 20 kg of alloy held at °C.

The sample taken 2 minutes after the modification process had a dipledge run parameter of 6.5X, and the sample taken 10 minutes later had a dipledge run parameter of 7''.

In a comparative test, when tablets of modifier were pressed into an alloy as described in Example 1, the sample removed after 2 minutes had a diblefcidin parameter of 3.5'' and the sample removed after 10 minutes. The sample had a depression parameter of 3''.

The above-mentioned examples demonstrate that the method of the present invention improves the degree of improvement achieved and the rate of fading (oxidation loss), i.e., the silicon crystal after the improvement has been performed, over the commonly used plunging technique. Both the increase rate and the rate of increase indicate that it is excellent.

Example 3 A device of the type shown in FIG. 4 and a rotating device shown in FIGS. 1 and 2 were modified using an aluminum-silicon alloy containing 9% silicon and 3% copper. I used it to do this. Degasses 350 kg of an alloy containing 2 parts per million of sodium using nitrogen at a flow rate of 25 liters of nitrogen per minute using an apparatus operating at 780°C and a rotor speed of 600 rpm. Then, droplet-shaped modifier particles containing about 50% by weight sodium carbonate were added at a rate of 642 grams per minute over a period of 2 minutes.

This treatment reduces the sodium content of the alloy by 7 parts per million.
1 part, giving a depression parameter of 7'' as determined by thermal analysis.

Assuming that this modification method was carried out using the conventional method of dipping tablets of modifier into the molten alloy under the same conditions, adding modifier at a rate of 2.5 kg per ton would result in 1,000,000 min. of 100 parts of sodium content.

However, when improvements are made using the device according to this invention,
An efficiency of 71% was achieved with only 1284g of modifier used, for a total of 138% of the efficiency of the modifier tablets.
It showed 2%.

Example 4 Using equipment of the type used in Example 3, the alloy used in Example 3 was grain refined with droplet-shaped refining particles of 6 m diameter during degassing. did. 8/1,000,000
350 kg of an alloy containing 50% of boron was heated with nitrogen.
Degassed at a flow rate of 25 liters of nitrogen per minute with an apparatus operating at 780'C and a rotor speed of 60 Orpm. This treatment reduces the boron content of the alloy by 100
The number of copies was increased to 29/10,000. As a result of thermal analysis, it was found that the primary solidification was shortened from 11.5 hours to 6.5 hours. This is a standard technique for evaluating the refinement of aluminum, and approximately indicates the grain size of the primary crystals of aluminum. Using this technique, the longer the secondary solidification time, the larger the particle size of the primary aluminum crystals. During this treatment, the hydrogen content of the alloy varies from 0.25 parts per million to 0 parts per million.
．． It decreased to 0.5 copies or less.

If we refine the alloy by manually adding a linear piece of master alloy containing 5% titanium and 1% boron under the same conditions, the boron content in the alloy will be approximately 27 parts per million. To achieve this, 10 linear pieces each weighing 100 g would be required.

However, using the apparatus of the present invention, an efficiency of 110.5% was achieved with the addition of only 925 g of refined alloy, giving a total efficiency of 116.1% for the master alloy wire addition.

[Brief explanation of the drawing]

FIG. 1 is a bottom view of a rotor for a rotating device used in the present invention. FIG. 2 is a vertical cross-sectional view of the rogue of FIG. 1 in combination with a shaft; FIG. 3 is a schematic diagram of a molten metal processing apparatus according to the present invention. FIG. 4 is a schematic vertical sectional view of a portion of another molten metal processing apparatus according to the present invention.

Claims (1)

[Claims] 1. A rotating device consisting of a hollow shaft (1) having a discharge end and a hollow rotor (2) attached to the shaft, the rotor having a plurality of blades (13), Each vane extends from the shaft or a position close to the shaft toward the circumference of the rotor, and the hollow interior of the rotor is divided into a plurality of compartments (1
0), and each compartment has an entrance (11) near the shaft.
and an outlet (12) near the periphery of the rotor, the rotor having a mechanism for passing the particulate treatment agent and gas from the discharge end of the shaft into the compartment, and the rotor having a rotating device which is connected to the molten metal in the vessel. the device is rotated to introduce molten metal into the compartment through the inlet, supplying a particulate treatment agent and gas for the molten metal to the shaft, and supplying the particulate treatment agent and gas from the discharge end of the shaft. molten metal, characterized in that it emerges into a compartment, enters the compartment, is mixed with the molten metal in a rotor, and as it emerges from the rotor is dispersed in the molten metal contained in a container. A method of processing using a particulate processing agent and gas. 2. Consisting of a container, a rotating device for dispersing the particulate processing agent and gas into the molten metal placed in the container, and a mechanism for supplying the particulate processing agent and gas to the rotating device, The rotating device consists of a hollow shaft (1) with a discharge end.
) and a hollow rotor (2) attached to the shaft, the rotor has a plurality of blades (13), each blade extending from the shaft or a position close to the shaft toward the periphery of the rotor, and the rotor The hollow interior is divided into a plurality of compartments (10), each compartment having an inlet (11) near the shaft and an outlet (12) near the periphery of the rotor, the rotor having a particulate treatment agent and a gas. An apparatus for treating molten metal with a particulate treatment agent and a gas, characterized by having a mechanism for passing molten metal from the discharge end of a hollow shaft to a compartment. 3. The discharge end of the shaft (1) opens into a manifold (8) in the rotor, and the inlet (11) of the compartment (10) is in the wall (6) of the manifold. Apparatus according to scope 2. 4. The device according to claim 2 or 3, wherein the mechanism for supplying the particulate processing agent and gas to the rotating device is a hopper having a gas injection nozzle. . 5. The mechanism for supplying the particulate treatment agent and gas to the rotating device is a device (23) that fluidizes the particulate treatment agent with gas to create a dispersion, and the mechanism is a device (23) that fluidizes the particulate treatment agent with gas to create a dispersion. Device according to claim 2 or 3, characterized in that it is connected to a borehole in a shaft of a rotating device. 6. A device for fluidizing the particulate treatment agent comprises a container (24) having a closable inlet (25) at the upper end for containing the particulate treatment agent and a container (24) near the lower end for fluidizing the particulate treatment agent. 6. Device according to claim 5, characterized in that it consists of a primary inlet (27) for the introduction of gas and a pulp (26) at the lower end connected to a pipe (33). 7. Device according to claim 6, characterized in that the container has a secondary gas inlet (29) in order to reduce the concentration of particulate treatment agent in the dispersion. . 8. Device according to claim 6, characterized in that the container has a gas outlet (30) connected to a pipe (33) near the top end. 9. A mechanism for supplying the particulate treatment agent to the rotating device,
a side wall (58), a sealed top surface (52) with an inlet (53) that can be closed to admit particles of treatment agent;
, a hole (54) in a lower part (55) communicating with a tube (61) installed in a boring hole (62) of a shaft (63) of a rotating device, and a side wall (58) of the hopper in a lower part. The tube has at least one row of circumferentially spaced holes, each hole having a sliding member (56, 57) projecting through the side wall into the interior of the hopper, and the tube has a gas introduction hole therein. 3. Device according to claim 2, characterized in that it is provided with one or more holes for. 10. The hopper (51) has two or three or more rows of holes in the side wall (58) and sliding members (56, 57), according to claim 9. The device described. 11. The hole in the side wall of the hopper (51) and the sliding member (5
6) is characterized in that the holes and sliding members in a certain row are attached above and between the holes and sliding members in another row. Apparatus according to scope 10. 12. Each row has three holes and three sliding members (56, 57
12. Device according to any one of claims 9 to 11, characterized in that it is comprised of: 13. Device according to any one of claims 9 to 12, characterized in that the hopper (51) is of inverted conical shape. 14. Boring hole (62) of shaft (63) of rotating device
The tube (61) attached inside the hopper (51)
It passes through the block (64) below the bottom of the
The block has one or more ducts (61) communicating with the interior of the tube (61) by means of holes in the wall of the tube (61).
5). Device according to any one of claims 9-13, characterized in that it has: 15. Device according to any one of claims 9 to 14, characterized in that the device is provided with a mechanism (69) for introducing gas into the borehole of the shaft on the outer circumference of the tube.