KR101500089B1 - Apparatus for measuring slag's viscosity - Google Patents

Abstract

The present invention relates to a slag conveyor comprising a device body disposed on a slag conveying path and having an inner hole and a slag temperature measuring part disposed inside the device body and provided to measure the temperature of the slag, And a slag viscosity measuring unit provided to measure a viscosity value of the slag in the temperature range measured by the temperature measuring unit. According to the present invention, there is provided a slag viscosity measuring apparatus for measuring the viscosity of a slag, It can be expected that the viscosity of the slag according to the temperature is accurately measured in real time.

Description

[0001] Apparatus for measuring slag viscosity [0002]

More particularly, the present invention relates to a device for precisely measuring the viscosity of slag according to the temperature of the slag, which is introduced into the slag conveying path at the exit of the blast furnace.

The viscosity of the blast furnace slag is determined by the chemical composition of the iron ore and the fuel charged to the blast furnace. The viscosity of the blast furnace slag is an important factor in determining the air permeability and liquid permeability in blast furnace operation. Therefore, It is necessary to grasp the viscosity.

Conventionally, the composition of iron ore and fuel charged in the blast furnace was analyzed comprehensively, and the expected viscosity of the slag was calculated by a calculation formula. However, there is a problem that the calculation method based on such a calculation shows a limit in which the accuracy is poor when the operating conditions change from time to time.

Prior art related to the viscosity measurement of slag is Patent Publication No. 10-2002-0053276. FIG. 4 of this prior art document shows a conventional slag viscosity measuring device for measuring the viscosity by sampling a slag sample.

It is an object of the present invention to provide an apparatus for accurately measuring the viscosity of slag in real time based on temperature by being introduced into a slag conveying path from an exit port side of a blast furnace.

In order to achieve the above object, an embodiment of the present invention provides the following slag viscosity measuring device.

In one embodiment of the present invention, there is provided an apparatus for controlling the temperature of a slag, comprising: a device body disposed on a slag conveyance path, the device body having an inner hole; a slag temperature measurement unit disposed inside the device body, And may include a slag viscosity measuring unit provided to measure a viscosity value in a temperature range of the slag measured by the temperature measuring unit.

In one embodiment, the viscosity measuring unit may include a plurality of slag inlet holes formed at a lower end of the apparatus body, a plurality of slag discharge holes spaced apart from the inlet holes at a predetermined distance from an inner hole of the apparatus body, A rotor block disposed in the inner hole and connected to the driving body mounted on the upper portion of the apparatus body and connected to the connecting rod and provided to raise the slag, and a rotary load disposed on the upper end of the apparatus body, And a viscosity measuring sensor provided to measure the viscosity of the slag.

In one embodiment, the rotor block is provided in a cylindrical shape, and a screw line may be formed around the rotor block.

In one embodiment, the device body and the rotor block are formed of a graphite material, and further include protective gas supply means for forming an inert gas region in the periphery of the device body and the rotor block to prevent decarburization can do.

In one embodiment, the protective gas supply means is connected to a gas nozzle disposed around the outer surface of the apparatus body and provided to inject inert gas and a gas flow path formed inside the apparatus body, and the inert gas is supplied to the gas nozzle And a protection gas supply unit for supplying the protection gas.

In one embodiment, the temperature measuring unit may include a thermocouple mounted on one side of the inside of the apparatus body.

In one embodiment, the apparatus may further include a preheating member disposed along an outer periphery of the apparatus body to block solidification of the slag on an outer surface of the apparatus body due to a temperature drop.

In one embodiment, the heat dissipation member may further include a heat dissipating member spaced apart from the preheating member by a predetermined distance so as to block the high temperature of the slag, the heat dissipating member being disposed along the outer circumference at an upper portion of the apparatus body.

One embodiment of the slag viscosity measuring apparatus of the present invention can directly measure the viscosity of the slag discharged from the outlet of the blast furnace, thereby obtaining a precise value of the viscosity characteristic of the slag.

Also, by measuring the temperature of the slag together, it is possible to measure the viscosity change in real time according to the temperature of the slag. These measured values can be used to more accurately grasp the viscosity characteristics of the slag in connection with the information of the iron ore and the fuel to be charged, which can improve the efficiency of the blast furnace operation.

By applying the screw rotation method, even if the amount of slag flowing on the slag flow path is small, the slag can be smoothly raised and the viscosity of the slag can be measured.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a position on a blast furnace process for measuring the viscosity of slag by a slag viscosity measuring apparatus according to the present invention. FIG.
2 is a perspective view of an embodiment of a slag viscosity measuring apparatus according to the present invention.
FIG. 3A is a side view of the invention shown in FIG. 2. FIG.
FIG. 3B is a side cross-sectional view of the invention shown in FIG. 3A.
4A to 4C are operational states of an apparatus for measuring slag viscosity according to an embodiment of the present invention.

In order to facilitate understanding of the features of the present invention as described above, a slag viscosity measuring apparatus according to an embodiment of the present invention will be described in more detail.

In order to facilitate understanding of the embodiments described below, in the reference numerals shown in the accompanying drawings, the related components among the components that perform the same function in the respective embodiments are denoted by the same or an extension line number.

Embodiments related to the present invention are basically based on the fact that the viscosity of slag is accurately measured in real time based on the temperature, which is injected into the slag transfer path from the outlet of the blast furnace.

Hereinafter, a specific embodiment of the present invention will be described with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a position on a blast furnace process for measuring the viscosity of slag by a slag viscosity measuring apparatus according to the present invention. FIG. And FIG. 2 is a perspective view of an embodiment of the apparatus for measuring slag viscosity according to the present invention, wherein FIG. 3A is a side view of the invention shown in FIG. 2, and FIG. 3B is a side sectional view of the invention shown in FIG.

1 to 3B, an embodiment of the slag viscosity measuring apparatus 10 of the present invention may include an apparatus body 20, a slag temperature measuring unit 30 and a slag viscosity measuring unit 50 have.

The slag viscosity measuring apparatus 10 according to the present invention is provided with a flow path 3 in which the slag discharged from the outlet 4 of the blast furnace 2 and discharged to the slag treating section 5 flows, The viscosity of the slag is measured. Of course, the slag viscosity measuring apparatus 10 according to the present invention may be provided as a portable type, and the operator can measure the viscosity of the slag by arranging it on the slag flow path as needed.

Thus, the device body 20 is disposed on the slag flow path, and the device body 20 is provided in the form of a cylindrical housing and may have an inner hole 21. Here, the upper portion of the device body 20 may be formed of a metal material, and the lower portion G of the device body 20 may be formed of a graphite material. Since the graphite material is strong in heat resistance and can withstand the high temperature of the slag, it is preferable that the lower part of the apparatus body 20, in which the slag is partially deposited, is made of a graphite material. However, Or other heat resistant material that can withstand heat.

The viscosity measuring unit 50 may be disposed in the inner hole 21 of the apparatus body 20 and may be provided to measure a viscosity value of the measured slag in the temperature measuring unit 30 The viscosity measuring unit 50 may include a slag inlet hole 51, a slag discharge hole 52, a driving unit 56, a rotor block 58 and a viscosity measuring sensor 59.

The slag inlet holes 51 may be formed at the lower end of the apparatus body 20 and may be formed along the lower end of the apparatus body 20. The slag discharge hole 52 may be spaced a certain distance from the inlet hole 51 in the inner hole 21 of the apparatus body 20 and may be formed in a plurality of holes. In an embodiment of the present invention, the inlet hole 51 and the outlet hole 52 may be provided at four intervals of 90 degrees apart from each other. However, the present invention is not limited thereto.

The diameter Ø2 of the inlet hole 51 may be 15 mmØ and the diameter Ø1 of the outlet hole 52 may be 5 mmØ. This is because the slag introduced from the inlet hole 51 remains in the internal hole 21 for a predetermined time and is discharged into the discharge hole 52.

That is, the diameter of the inflow hole 51 is larger than the diameter of the discharge hole 52, and the inflow amount is relatively small, but the discharge amount is relatively small, so that the inflow hole 51 is maintained at a constant water level for a predetermined time while rising along the inner hole 21 . Accordingly, a certain load is applied to the rotor block 58 due to the viscosity of the slag.

Here, the rotor block 58 is provided in a cylindrical shape, and a screw line may be formed around the rotor block 58 so that the slag can smoothly rise.

The rotor block 58 is connected to a driving rod 56 disposed in the inner hole 21 of the apparatus body 20 and mounted on the upper portion of the apparatus body 20, . ≪ / RTI > Even if the slag rises due to the difference in diameter between the inlet hole 51 and the discharge hole 52, the rotor block 58 is retained at a certain level in the inner hole 21. At this time, due to the viscosity of the slag, Is interrupted.

In other words, the rotor block 58 is subjected to a load, which results in a change in the resistance value. In order to rotate the rotor block 58 at a constant speed, more driving power is applied to the driving block 56 And,

The viscosity measuring sensor 59 is connected to the driving unit 56 at the upper end of the apparatus body 20 and converts the resistance change amount applied to the driving unit 56 to measure the viscosity value of the slag will be.

A supporting beam 60 may be disposed on the outer circumference of the connecting rod 57 to prevent the shaking phenomenon due to the rising slag when the rotor block 58 rotates. At this time, a support ring 61 contacting the connection rod 57 is disposed on the support beam 60 so that the connection rod 57 can be stably guided to rotate.

The driving unit 56 may be a general stepping motor or an inverter motor including a coil part 56a, a rotor 56b and a battery 56c for supplying power, but is not limited thereto.

The temperature measuring unit 30 is disposed at one side of the inside of the apparatus body 20 and includes a thermocouple 31 for measuring the temperature of the slag and a thermocouple 31 connected to the thermocouple 31 for displaying the current temperature of the slag And a temperature display unit 33 for displaying the temperature.

That is, when the lower part of the apparatus body 20 is immersed in the slag, the temperature of the slag is transmitted through the lower part of the apparatus body 20, and the thermocouple 31 measures the temperature of the slag, Is displayed. The viscosity of the slag is determined according to the present temperature of the slag in conjunction with the viscosity measuring unit 50.

The lower portion of the device body 20 and the rotor block 58 may be formed of graphite and may be formed of a material such as a material of a lower portion of the device body 20, And a protective gas supply means (40) for forming an inert gas region in the periphery of the rotor block (58).

When the graphite material is exposed to air, oxygen in the air reacts with carbon of the graphite material to form carbon monoxide, carbon dioxide, etc., so that the carbon content in the graphite material becomes small. Therefore, it is necessary to form an inert gas region around the steel material of the graphite material to prevent contact with air.

The protective gas supply unit 40 may include a gas nozzle 45, a gas passage 43, and a protective gas supply unit 41.

First, the gas nozzle 45 is disposed around the outer surface of the apparatus body 20 and may be provided to inject inert gas. The plurality of gas nozzles 45 may be disposed along the outer circumference of the apparatus body 20 and may be connected to the gas passage 43 disposed in the apparatus body 20.

The gas channel 43 is connected to the protective gas supply unit 41 through a flange connection and the protective gas supply unit 41 is provided to supply the inert gas to the gas channel 43. The inert gas may be nitrogen gas, argon gas, or the like.

Next, in an embodiment of the present invention, in order to prevent the slag from solidifying on the outer surface of the apparatus body 20 due to the temperature drop, a preheating member 70 disposed along the outer circumference of the apparatus body 20 .

When the lower portion of the apparatus body 20 is directly immersed in the slag, the slag may solidify on the outer surface of the apparatus body 20 due to the difference between the high temperature of the slag and the initial outer surface temperature of the apparatus body 20. [ Therefore, in order to prevent this phenomenon, the preheating member 70 is used to preheat the lower portion of the apparatus body 20 immersed in the slag. Here, the preheating member 70 may be provided in the form of a heating plate in which heating wires are disposed along the circumferential direction.

Further, in one embodiment of the present invention, a heat dissipating member (80) is disposed at a predetermined distance from the preheating member (70) so as to block the high temperature of the slag, and is disposed along the outer circumference at an upper portion of the apparatus body can do.

That is, the heat dissipating member 80 is cooled to prevent heat loss of the viscosity measuring sensor 59 and the driving unit 56 due to the high temperature of the slag. A cooling water path 81 is formed in the heat dissipating member 80 to provide water cooling.

The configuration of an embodiment of the present invention is the same as described above, and the operation process will be described below.

4A to 4C are operational states of an apparatus for measuring slag viscosity according to an embodiment of the present invention.

First, referring to FIG. 4A, the operator inserts the slag viscosity measuring apparatus 10 of the present invention into the penetrating portion formed in the protective cover 7 on the slag moving path located on the exit side of the blast furnace.

The next operator gives a signal to the protective gas supply part 41 through the control part C to form an inert gas area in the lower part of the device body 20 and the peripheral part of the rotor block 58. This is to prevent carbon leakage of the graphite material by blocking contact with air as described above. The inert gas supplied from the protective gas supply unit 41 is injected through the gas nozzle 43 and passes through the gas nozzle 43 to be inactivated in the lower part of the apparatus body 20 and the peripheral part of the rotor block 58 Thereby forming a gas region.

Then, the operator operates the preheating member (70) through the control unit (C) to heat the lower part of the apparatus body (20) by the temperature of the slag in advance. The lower part of the apparatus body 20 is immersed in slag, and the temperature difference with the slag becomes smaller as it is preheated in advance, so that the phenomenon that the slag solidifies on the outer surface of the apparatus body 20 is prevented.

At the same time, the operator operates the heat radiating member (80) through the control unit (C). That is, the lower part of the apparatus body 20 is heated by the preheating member 70 and the upper part of the apparatus body 20 is cooled by the heat radiating member 80. The viscosity measuring sensor 59 and the driving unit 56 are disposed on the upper part of the apparatus body 20 to prevent heat loss from the high temperature of the slag by the heat radiating member 80.

Next, as shown in FIG. 4B, the operator operates the driving unit 56 through the control unit C. FIG. The rotor block 58 connected to the rotary shaft of the driving unit 56 is connected to the connecting rod 57 and the slug is moved along the screw line of the rotor block 58 do.

At this time, due to the difference in diameter between the inlet hole 51 and the discharge hole 52, the slag raised along the rotor block 58 maintains a certain level in the inner hole 21. [ Which causes the rotor block 58 to constantly undergo a constant rotational load.

Referring to FIG. 4C, as the rotor block 58 is subjected to a constant rotational load, the driving unit 56 undergoes a change in the resistance value, and the rotor block 58 is further rotated to rotate the rotor block 58 at a constant speed. Power is needed. As a result, a difference is generated between the rotational power before the slag entrance and the rotational power after the slag entrance into the drive unit 56, and the resistance change amount for inducing the change in power is converted into the viscosity value of the slag in the viscosity measurement sensor 59 . The viscosity value is sent to the controller C and displayed to the operator.

At the same time, the temperature of the slag is measured in the thermocouple 31, which is sent to the control unit C through the temperature display unit 33 and displayed to the operator.

That is, the operator can precisely measure the viscosity of the slag in real time at the current temperature of the slag. Table 1 below shows the viscosity values of the slag measured by the slag viscosity measuring apparatus (10).

Number of measurements Temperature (℃) Viscosity (poise) One 1520 5.4 2 1510 5.6 3 1520 6.0 4 1510 5.3 5 1520 4.6

The present invention can be expected to provide an effect of accurately measuring the viscosity of slag in real time in accordance with the temperature by being injected into the slag conveying path from the exit port side of the blast furnace through the above-described construction and operation.

The above matters are only specific examples of the slag viscosity measuring apparatus.

Therefore, it should be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims. do.

10 ... slag viscosity measuring device 20 ... device body
21 ... inner hole 30 ... temperature measuring unit
31 ... thermocouple 33 ... temperature display
40 ... protective gas supply means 41 ... protective gas supply portion
45 ... gas nozzle 50 ... viscosity measuring section
51 ... Slag inlet hole 52 ... Slag outlet hole
56 ... driving part 56a ... coil part
56c ... battery 57 ... connection rod
58 ... Rotor block 59 ... Viscosity sensor
61 ... support ring 70 ... preheating member
80 ... heat radiating member 81 ... cooled water
83 ... Cooling water supply part

Claims (8)

A device body disposed on the slag conveying path and having an inner hole;
A slag temperature measuring unit disposed inside the apparatus body and provided to measure the temperature of the slag; And
And a slag viscosity measuring unit disposed in an inner hole of the apparatus body and adapted to measure a viscosity value of the measured slag in the temperature measuring unit,
Wherein the viscosity measuring unit comprises:
A plurality of slag inflow holes formed at a lower end of the apparatus body;
A rotor block disposed in an inner hole of the apparatus body and connected to a driving unit mounted on an upper portion of the apparatus body and connected to the connecting rod to rotate the screw lines formed on the outer circumferential surface and to raise the slag;
A plurality of slag discharge holes formed in the inner hole of the apparatus body to discharge slag raised by the rotor block, the slag discharge hole being formed on the upper side of the position where the rotor block is disposed; And
A viscosity measuring sensor disposed at the top of the apparatus body and being provided to measure the viscosity of the slag through a rotational load applied to the driving section;
And a slag viscometer.
delete delete The method according to claim 1,
The apparatus body and the rotor block may further include protective gas supply means formed of a graphite material to form an inert gas region in the periphery of the apparatus body and the rotor block to prevent decarburization Of the slag viscosity.
5. The method of claim 4,
Wherein the protective gas supply means comprises:
A gas nozzle disposed around an outer surface of the apparatus body and provided to spray an inert gas; And
A protective gas supply unit connected to a gas flow path formed inside the apparatus body and supplying an inert gas to the gas nozzle;
The slag viscosity measuring device comprising:
The method according to claim 1,
Wherein the temperature measuring unit includes a thermocouple mounted on an inner side of the apparatus body.
The method according to claim 1,
Further comprising a preheating member disposed along an outer periphery of the apparatus body to prevent the slag from solidifying on an outer surface of the apparatus body due to a temperature drop.
8. The method of claim 7,
Further comprising a heat dissipating member spaced apart from the preheating member so as to block the high temperature of the slag and disposed along the outer circumference at an upper portion of the apparatus body.

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