FI81125C - ANORDINATION FOR ATTACHED AND HORIZONTAL CONVERTERS. - Google Patents

Description

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Device for supplying water-air blowing to a horizontal converter

The present invention relates to the field of blast furnace equipment used in non-ferrous metallurgy, and more particularly to an apparatus for supplying water-air blowing to a horizontal converter.

The present invention can be used for converter blowing of copper, copper-nickel, nickel and multi-metal stones to produce desired converter products, including converter fine stone or raw copper.

Although the terms metalstone and converter fine stone are familiar to those skilled in the art, for the avoidance of doubt, the following explains what is meant by these terms: metalstone is a mixture of non-ferrous metal sulphides and iron sulphide (copperstone: CU2S + PeS + impurities; copper-nickel2S + + impurities; multimetallic rock: CU2S + ZnS + PbS + FeS + impurities; Nickel rock: N13S2 + FeS + (Ni + Fe) + impurities); - the converter fine stone is a non-ferrous metal stone (Nickel stone: N13S2 + Ni; copper-Nickel stone: CU2S + N13S2) ·

Raw copper is made from copper and multi-metal stones. The converter fine stone is made of nickel and copper-nickel stones.

Recently, technical and economic requirements for converter processing methods such as higher power of metal rock processing converters, higher separation rate of non-ferrous metals (e.g. cobalt) in copper and copper-nickel rock converter blowing, significant labor shortages in converter operation, explosion reduction and explosiveness.

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The use of water-to-air blowing in the converter treatment process is known to be a very effective method for cleaning pipes and controlling the temperature of the converter process.

One device for supplying air, water and fuel to a horizontal converter is known in the art (SU Inventor Certificate No. 729 270).

This device comprises a venturi-like fuel supply pipe and a flue coaxially connected thereto for supplying air to the converter.

Cylindrical water supply pipes are arranged on the walls of said chimney at regular intervals on its circumference.

The air supply flue is equipped with a turning possibility in order to change the area in which the fuel premixes with the air.

The venturi-type fuel supply pipe has a side pipe that can be connected to the fuel supply manifold. The air supply flue has a side pipe that can be connected to the air supply manifold when all cylindrical water supply pipes are in turn connected to the water supply manifold. The fuel is fed through a circular opening of variable cross-section between the venturi-shaped fuel supply pipe and the air supply flue.

The fuel burns completely or partially in the premixing area, the length of which may vary within wide limits as the size of the circular orifice changes, while a special mechanism moves the air supply flue horizontally.

By changing the size of the premixing area, the flow rate of the combustion products of the fuel, which protect the flue from combustion when it enters the melt, can be adjusted.

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By supplying water from the cylindrical tubes directly to the melt, the melt can be cooled right near the mouth of the flue.

Such a device with which water is fed to the converter ensures the effective effect of water on the melt by changing its temperature and, as is known, the yield of cobalt in the metal rock depends on the melting temperature of the converter stone. This dependence can be expressed as follows: Co% = a - bt, where a and b are the standard correction factors for the composition and converter volume of the metal stone and t is the melting temperature of the converter fine stone, C °.

The above dependence proves that the amount of extracted cobalt increases as the melting temperature of the converter fine stone decreases.

However, when the cylindrical tubes from which water is fed to the converter are fitted just at the mouth of the flue, the air flow prevents the water from spraying and, as a result, large amounts of water enter the melt, causing a risk of explosion.

In addition, such a device is difficult to build due to the large number of water supply pipes.

There is another known device for supplying air and liquid mixtures to a converter (SU inventor certificate No. 722 975).

This device comprises an air supply manifold comprising ball valves and flues which are coaxial with each other. In addition, the device comprises a liquid supply manifold arranged inside the air supply manifold. The fluid supply manifold has side tubes with nozzles for supplying fluid to each flue. These side pipes are rigidly attached to the body of the liquid supply collector and have individual shut-off valves.

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Since the liquid in this device is fed to the inlet part of the flue close to its walls, air carries said liquid with it inside the flue and partly sprays it into the melt. When the atomized liquid comes into contact at the mouth of the chimney with a loose vault (solidified melt on the inner surface of the chimney), micro-explosions are generated which break up the vault. This in turn cleans the flue passage, thus increasing the capacity of each air supply flue.

However, since the liquid is fed to the inlet near the walls of the chimney, the air does not atomize part of this liquid but flows over the inner surface of the chimney (so-called "film effect"), goes to the outer surface of the chimney, then into the refractory brick lining. In addition, as water accumulates in the refractory brick lining, water may cause an explosion if a metal melt accidentally enters it.

Fixed installation of fluid supply side pipes often causes mechanical damage during various work steps (sampling, lining thickness measurement, etc.).

The main object of the invention is to provide a device for feeding water-jet blowing to a horizontal converter, in which a water supply collector is mounted in such a way as to ensure even spraying of water into the air flow, increase the reliability of the device and reduce the risk of explosion by preventing water from coming into contact with molten metal.

This issue is solved by a device for supplying water-air blowing to a horizontal converter, comprising an air supply manifold comprising ball valves and flues coaxially arranged in pairs and a water supply manifold arranged inside the air supply manifold and equipped with side pipes each flue and which side pipes are rigidly attached to the body of the water supply collector and provided with individual shut-off valves inside them, and in which device according to the invention the water supply collector can be rotated about its longitudinal axis to make each nozzle approximately coaxial with the corresponding flue.

By aligning each nozzle of the device in operation approximately with each corresponding flue, the "membrane phenomenon" is eliminated, as the air flow carries the water jet along its axis at which the current moves at maximum speed, completely spraying the water inside the flue without depositing on its walls. inside the brick liner, but will be used to completely remove the vault and control the temperature of the converter processing process, which in turn reduces the risk of explosion.

Because the water supply collector can be rotated about its longitudinal axis, the water supply side pipes with their nozzles can be raised for various additional operations. This in turn improves the reliability of the device.

Fitting the water supply manifold inside the air supply manifold improves the reliability of the device for supplying water-air blowing to the horizontal converter. This is possible because solids and molten metal do not come into contact with the brittle water supply collector during the charging and discharging steps of the converter and thus cannot damage said collector.

Thus, the use of the device according to the invention ensures a uniform spraying of water into the air flow, increases the reliability of said device and reduces the risk of explosion due to the contact between water and melt.

To clarify the invention, an embodiment of the present invention will now be described with reference to the accompanying drawings, in which: Fig. 1 shows a device in longitudinal section for supplying water-air blowing to a horizontal converter; Fig. 2 is a sectional view taken along line II-II of Fig. 1 at the moment when the water-air blowing is fed to the horizontal converter; Fig. 3 is a sectional view taken along line III-III in Fig. 1 at the time of performing the additional operations.

The device for supplying water-air blowing to a horizontal converter comprises an air supply collector 1 (Figures 1, 2 and 3).

This manifold comprises ball valves 2 and flues 3 arranged in pairs coaxially. The number of flues 3 is left to the user's discretion, as it must be selected according to the capacity of the converter. The number of ball valves 2 should correspond to the number of flues.

A water supply collector 4 is arranged inside the air supply collector 1. Said water supply collector 4 has side pipes 5 (Figures 2, 3) with nozzles 6 for supplying water to each flue 3. The side pipes 5 are rigidly attached to the body of the water supply collector 4. to one of the flues 3.

The water supply collector 4 can be rotated about its longitudinal axis. The device with which the water supply collector 4 is turned over can be any known device suitable for turning the collector. To simplify the drawing, this device has been omitted from it.

The water supply collector 4 is rotated about its longitudinal axis in order to fit each nozzle 6 coaxially to the corresponding flue 3.

At the moment when water is fed to each flue 3, each side pipe 5 (Fig. 2) with its nozzle 6 is arranged approximately coaxially with the corresponding flue 3. If an additional operation has to be performed (sampling, etc.), the side tubes 5 with the nozzle 6 are moved to the position shown in Fig. 3.

When the converter processes the metal rock into the final product, air is continuously fed to it by a water-air blowing feeder. Air flows from the air supply manifold 1 to the flues 3 and thus to the converter. The vault formed in the wall of the active converter at the mouth of the flues 3 reduces the passage of each flue, which reduces the overall capacity of the converter. These vaults are removed from the flues 3 by supplying water from side pipes 5 with nozzles 6.

To this end, the collector 4 is rotated relative to its longitudinal axis to the water supply position. The side pipe 5 is placed at right angles to the axis of the flue 3, the shut-off valve 7 is adjusted at the ball valve 2 and the nozzles 6 in the direction of the axes of the flues 3. The water is then fed to a water supply collector 4.

As soon as the vault is released from the flues or the melt temperature drops to the desired level, the water supply to the water supply collector 4 is cut off and the collector is turned back so as not to interfere with additional operations (sampling, etc.) through the ball valves 2.

If it is necessary to cut off the water inlet to one of the damaged flues 3, the water inlet to a particular side pipe 5 with its nozzle 6 is cut off by means of a corresponding shut-off valve 7 via a corresponding ball valve 2.

The use of the proposed device ensures even spraying of water into the air flow and better reliability of the device and reduces the risk of explosion by preventing water from coming into contact with the melt.

Claims (1)

An apparatus for supplying water-air blowing to a horizontal converter, the apparatus comprising an air supply manifold (1) provided with ball valves (2) and flues (3) arranged coaxially in pairs and a water supply manifold (4) fitted with an air supply manifold (4) ) and equipped with side pipes (5) with nozzles (6) for supplying water to each flue (3) and which side pipes are rigidly attached to the body of the water supply collector (4) and equipped with individual shut-off valves (7), characterized in that the water supply collector (4) can be rotates about its longitudinal axis to fit each nozzle (6) approximately coaxially with the corresponding flue (3). 9 81125 Anordning for inerting with a water converter and a horizontal converter with inlet air collector (1) with a conveyor (2) and a shape (3) with a co-axial anchor, and with a waterproof collector (4) (1) with the aid of the green collector (5) with the munitions (6) with the aid of the water supply (3) with the aid of the water collector (4) with the aid of the individual collector (7) .