KR100384123B1 - Manufacturing apparatus and method for sinter cake non-addition return fine sinter - Google Patents

Abstract

The present invention relates to an apparatus and a method for producing a semi-glossy additive-free sintered ore which enables the production of sintered ore and its control without the addition of semi-ore generated during the processing of the properties.

According to the present invention, a level sensor for detecting a level of half light, a signal amplifier connected to the level sensor and amplifying the voltage signal output from the post-layer control device, and a V for converting the voltage signal output from the signal amplifier into a current signal. A semi-optic additive-free sintered ore manufacturing apparatus including an / I converter, an instrumentation control system connected to the V / I converter, and an electric control system for receiving a current signal from the instrumentation control system is provided.

According to the present invention, an alarm is generated according to the fluctuation range of the half light measured by the level sensor, and the alarm activates the character processing equipment in the electric control system, and the compatible damper is reversible from the first line to the third line. Measuring the quality of the sintered ore through the step of performing the semi-glossy of the first line without additive operation, adjusting the layer thickness of the sintering machine through the post-layer adjusting apparatus, and sampling the sintered ore with the layer thickness adjusted; According to the sintered ore quality is secured is provided a semi-optic additive-free sintered ore manufacturing method comprising the step of reversing the compatible damper 117 to the first line.

Description

Semi-gloss no addition sintered ore manufacturing apparatus and method {MANUFACTURING APPARATUS AND METHOD FOR SINTER CAKE NON-ADDITION RETURN FINE SINTER}

The present invention relates to an apparatus and a method for producing a semi-gloss free sintered ore, and in particular, an apparatus and a method for producing a semi-gloss sintered ore without the addition of a semi-glow having a particle size of 5 mm or less, which is inevitably generated during the processing of the product. It is about.

FIG. 1 is a process chart of sintered ore manufacturing process, and FIG. 2 is a process chart showing semi-light generation in conventional sintered ore manufacturing. Generally, in the steelmaking process, about 80% or more of sintered ore is used as the main raw material of the blast furnace. It has ~ 50mm and processes it in the process of characterization of sinter plant.

On the other hand, the return fine sinter is a sintered ore having particles of 5 mm or less smaller than the sintered ore particle size (5 to 50 mm) required by the blast furnace, and the semi-reflected light is used by being added to the sintered raw material again.

In general, when the quality of the sintered ore is good, there is little semi-glossy generation, and when the quality is poor, the semi-glossy occurs. As shown in FIGS. 1 and 2, the raw materials mixed and assembled in the drum mixer 102 undergo a firing process. After the high temperature sintered ore at 400 ° C. or more manufactured in the sintering machine 112 is discharged, and then crushed through the primary crusher 106, and then cooled in the cooler 107 for at least 1 hour to cool to room temperature. It is conveyed through the belt conveyors (119, 121) in the character processing process for processing to a particle size (5 ~ 50㎜) suitable for use in the blast furnace.

In the process of characterization, the raw material is crushed through the secondary crusher 108, and then divided into four sizes by the first and second vibrating screens 114a, b, and c, and finally, the pig iron is produced. Semi-glosses having a particle size distribution of 5 mm or less, which cannot be used in the blast furnace due to a decrease in air permeability, are repeatedly sent to the sintered ore manufacturing process for reuse.

The cause of the large amount of the semi-ore in the sintered ore manufacturing process is as follows.

First, when the mixing and assembling of the blended raw material is made poorly in the drum mixer 102 which is a raw material processing process,

Second, when the ignition intensity (a measure of the amount of heat required for 1 square meter of raw material area) is low, that is, when the ignition temperature of the ignition furnace is low,

Third, when the bed calories during baking in the sintering machine 112 is poor,

Fourth, when the sintering time (Flasme Front Speed (FFS)) is too fast, a large amount is generated from the top layer of the lumped ore.

In the sintered ore manufacturing process, the role of semi-glossy is required to form pseudo-particles in which the fine particles are attached to the nuclei of the semi-ores in the raw material, and the appropriate amount of semi-reused in the manufacture of sintered ores contributes to the improvement of the particle size of the blended raw materials. Thus, the air permeability in the sintering machine 112 bed is improved.

However, if air permeability is secured, the quality of sintered ore is greatly deteriorated when there are more semi-glosses, and the quality defects are vicious under the current system in which more semi-glosses are generated and inevitably reused in the process of characterization.

In addition, the increase in the amount of fuel (Coke, anthracite coal) is required in accordance with the increase in the semi-gwang to increase the various units, thereby reducing the external competitiveness, the conventional sintered ore processing process constitutes three vibration screen (114, 115, 116) lines The second line 115 in the center is a preliminary line that can be commonly used by each factory (two lines), and is used as an emergency for equipment abnormalities and repairs, and the second line 115 is used in the process of characterization. Since the semi-quartz was designed to be transported only to the corresponding factory, there was an unreasonable problem that inevitably use the semi-mineral even though the sintered ore manufacturing quality was poor.

In the figure, reference numeral 112 denotes a bogie, 117 a compatible damper, 117a a level sensor, and 120 a semi-light bin.

The present invention was devised in view of the above-described problems of the prior art, and an object of the present invention is to maintain a suitable sintered ore quality, to reduce manufacturing costs and to stably perform a blast furnace operation as a post-process. And to provide a manufacturing method.

1 is a sintered ore manufacturing process chart,

2 is a process chart showing half light generation in conventional sintered ore production;

3 is a block diagram of a semi-glossy additive-free sintered ore manufacturing apparatus according to the present invention,

Figure 4 is a flow chart for explaining a semi-gloss no additive sintered ore manufacturing method according to the present invention.

<Explanation of symbols for main parts of drawing>

120: semi-light bin 122: layer adjustment device

201: level sensor 202: proportional control block

203: signal amplifier 204: V / I converter

206: instrumentation control system 208: electric control system

A level sensor installed in the half light bin to sense the level of the half light to achieve the above object, a signal amplifier connected to the level sensor through a proportional control block, and amplifying the voltage signal output from the post-layer control device; A V / I converter for converting a voltage signal output from the signal amplifier into a current signal, an instrumentation control system connected to the V / I converter, and a current signal from the instrumentation control system and received by the level sensor And a semi-glossy additive-free sintered ore manufacturing apparatus including an electric control system for comparing and transmitting post-layer data recognized by the post-layer adjusting apparatus.

In addition, according to the present invention, the step of generating an alarm in accordance with the fluctuation range of the half light measured by the level sensor installed in the semi-glow bin, by the start of the character processing equipment in the electrical control system by the alarm, and the compatible damper in the first line The quality of the sintered ore is measured by the step of reversible to three lines, the operation of adding the semi-glossy of the first line, the step of adjusting the layer thickness of the sintering machine through the post layer adjusting device, and the sintered ore sampling operation with the layer layer adjusted. And a step of reversing the compatible damper to the first line in accordance with securing the sintered ore quality is provided.

In the present invention as described above, the overload of the half light is characterized in that it is detected by the level sensor of the compatible damper to be applied to the instrumentation control system.

In the present invention as described above, the layer thickness of the sintering machine is set to 560 to 580 mm.

Hereinafter, the present invention will be described in detail.

Figure 3 is a block diagram of a semi-reflective additive-free sintered ore manufacturing apparatus according to the present invention, Figure 4 is a flow chart for explaining a semi-reflective additive-free sintered ore manufacturing method according to the present invention, to detect the level of semi-light on the upper half of the semi-light bin 120 A level sensor 201 is provided, and the level sensor 201 is connected to a signal amplifier 203 for amplifying a voltage signal output from the level sensor 201 through a proportional control block (PID) 202. It is.

In addition, a V / I converter for amplifying the fine voltage signal output from the post-layer adjustment device 122 for adjusting the post-mixing raw materials in the bogie 112 and converting the voltage signal output from the signal amplifier 203 into a current signal ( 204 is connected to the signal amplifier 203 and the V / I converter 204 is connected to an instrumentation control system (DCS) 206.

In addition, the electric control system that receives the current signal from the instrumentation control system 206, and compares and transmits the data recognized by the level sensor 201 and the layered data recognized by the post-layer adjustment device 122 of the received current signal 208 is connected to the instrumentation control system 206.

Reference numeral 205 in FIG. 3 denotes a printer.

On the other hand, the semi-reflective additive-free sintered ore manufacturing method according to the present invention is carried out in the apparatus according to the present invention configured as described above, it will be described as follows.

If the following conditions are satisfied in the above-described first line 114 in the process of manufacturing the sintered ore by the operation of the sintering machine 112, the quality of the sintered ore is expected, and the semi-gloss no addition operation is performed.

Condition: when the fluctuation range (1.70%) of the half light measured by the level sensor 201 installed in the half light bin 120 rises continuously for 5 minutes or more;

Variation Equation = Current Level-Half Light Bin Level 5 Minutes ago ··· (1)

An alarm is generated by Equation (1), and the character processing equipment (first to third lines) is operated in the electric control system 208, and the half-light compatible damper 117 shown in FIG. After reversing from 114 to the third line 116, the semi-gloss free operation of the first line 114 is activated.

At this time, when the amount of semi-glow is 1.70% or less, the process returns to before the sintering machine is started, and afterwards, the layer thickness of the sintering machine 112 is down adjusted (560 to 580 mm) through the post-layer adjusting device 122, and sampling is performed. Work is to measure the quality of the sintered ore.

At this time, the reason why the layer thickness of the sintering machine is adjusted to 560 to 580 mm is because adequate ventilation for maintaining sintered ore quality is ensured within such adjustment range, and the drop strength is stabilized.

The quality of the sintered ore measures the drop strength (SI) (90% or more) and the fraction (30% or less), and when it is below the reference value, returns to the semi-no additive-free operation operation, and when the appropriate quality is obtained by satisfying the reference value, a compatible damper Reversible 117 to the first line 114.

In addition, the level sensor 117a in the compatible damper 117 is operated to prevent the secondary equipment troubles to monitor the overload of the half light during operation, the control situation is applied to the instrumentation control system 206 to display the screen It is known to the driver through 207, and when the quality of the sintered ore during the semi-additive-free sintered ore manufacturing process is eligible for continuous 2 data, the operation of adding the semi-light is performed in the reverse order of the above operation.

Hereinafter, the present invention will be described in more detail with reference to Examples.

(Example)

The blending ratio of the iron ore and the subsidiary materials limestone, silica, quicklime and coke and semi-ore used in the present invention is shown in Table 1 below.

Table 2 below shows the relationship between the air permeability obtained in the case where the raw materials of Table 1 are charged to the sintering machine balance, the sintering conditions are kept the same, and the semi-glossy is 'added' according to the ratio, and 'added'. .

※ Estimated air change according to the semi-light ratio added during sintering operation

Expected breathing rate = (1.3774 × half ratio) + 19.313

In addition, the operation results according to Table 2 to calculate the sintered ore quality according to the step change of the half light ratio, the results are shown in Table 3 below.

As shown in Table 3, in order to maintain the in-bed air permeability (39 ~ 46) to maintain an appropriate sintered ore quality by controlling the step after the compounding material layered in Table 4 below.

According to Table 4, after adding no semi-glossy, the air permeability for obtaining an adequate sintered ore quality was lowered step by step to 560 ~ 580 mm after the blended raw material layer in the trolley, as shown in Table 3 to add the semi-gloss appropriately (15 Sintered ore with stable drop strength and good quality was obtained as in the case of ˜20%).

As described above, according to the present invention can prevent the deterioration of the sintered ore quality due to the increase in the semi-gloss in advance to reduce the manufacturing cost, as well as to control the air permeability due to the stepwise increase of the semi-glossy, so as to always achieve a constant sintered ore quality, the post-process As a result, the operation can be stably performed.

Claims (4)

A level sensor 201 installed in the half light bin 120 to detect a level of half light; A signal amplifier 203 connected to the level sensor 201 through a proportional control block 202 and amplifying the voltage signal output from the post-layer adjustment device 122; A V / I converter 204 for converting the voltage signal output from the signal amplifier 203 into a current signal; An instrumentation control system 206 coupled to the V / I converter 204, And an electric control system 208 for receiving a current signal from the instrumentation control system 206 and comparing and transmitting the data recognized by the level sensor 201 and the layered data recognized by the layered controller 122. Semi-gloss no additive sintered ore manufacturing apparatus, characterized in that. Generating an alarm in accordance with the fluctuation range of the half light measured by the level sensor 201 installed in the half light bin 120; Starting the character processing facility in the electric control system by the alarm and reversing the compatible damper 117 from the first line 114 to the third line 116; Operating the semi-gloss of the first line 114 without addition; Adjusting the post-layer of the sintering machine 112 through the post-layer adjusting device 122, Measuring the quality of the sintered ore through the sintered ore sampling operation with the layer thickness adjusted, Semi-reflective additive-free sintered ore manufacturing method comprising the step of reversing the compatible damper (117) to the first line 114 in accordance with the sintered ore quality. 3. The method according to claim 2, wherein the semi-light is charged by the level sensor (117a) of the compatible damper (117) and applied to the instrumentation control system (206). The semi-gloss no addition sintered ore manufacturing method according to claim 2, wherein the layer thickness of the sintering machine (112) is 560 to 580 mm.