KR20010063898A - Apparatus for mixing sintering materials in the sintering machine - Google Patents

Abstract

PURPOSE: A mixer of a sintering machine is provided to mix element and mineral using a sintering process, and to improve productivity and quality despite using low-grade ore. CONSTITUTION: A mixing device(200) for a sintering machine comprises a geared motor base(200c) adjusting height of the mixing device according to change of height of upper ore; a mixing blade(200f) mixing the upper ore and limonite ore; a universal joint(200b) delivering power of a geared motor into the mixing blade; a race(200g) rotating and supporting the mixing blade; a switch body(200d) selecting starting of the mixing device; and a timer(200e) sensing starting of the sintering machine. The mixing device installs two 10t plates on the geared motor base to control the mixing device according to the height of the limonite ore. Thereby, the mixing blade reduces wear in mixing the upper ore and the limonite ore by hard facing.

Description

Apparatus for mixing sintering materials in the sintering machine}

The present invention relates to a device for mixing low-grade light and blended raw materials for the production of sintered ore used in the blast furnace, and more specifically, to reduce the production cost of iron ore resources and molten iron in the sintered ore manufacturing process to enhance the competitiveness of the product In order to prevent productivity degradation and quality deterioration, which are a problem in manufacturing sintered ore using low quality and low price iron ore instead of expensive iron ore, the mixing device for the sintering machine by securing the air permeability by mixing and sintering the brownish ore at the bottom of the bogie It is about.

In general, as shown in Figure 1, the sintered raw material is the primary raw material (iron ore) and secondary raw materials (limestone, silica sand, serpentine, quicklime, etc.), and fuel coke in the first drum mixer 101 in the raw material storage bin (100). ) Is mixed with water and granulated in the storage hopper 103 through the assembly process in the secondary drum mixer 102.

The sintered raw material (hereinafter referred to as raw material) granulated in the storage hopper 103 is evenly loaded in the plurality of trucks 108 in order by driving on the flat plate 110 by the rotation of the drum-type extruder 201. The bogie 108 immediately passes the ignition furnace 105 at a high temperature (1200 ° C.) to ignite the surface and the large pen 107 with the wind-up 106 below the bogie 108 during the effective burn distance (100 m). It is a process of agglomeration of iron ore that facilitates blast furnace operation by adjusting cold strength and fraction suitable for use in a blast furnace by forcibly sucking the outside air and supplying it to the blast furnace.

The future sintering operation, as shown in the following Table 1, should be carried out in parallel with the low slag operation to lower the cost while increasing the use of low-grade iron ore deterioration in quality and quality as iron ore raw material for sintering Quality degradation occurs.

Table 1

Particle size (%) Meltability Major mineral Coupling Water (%) + 5mm -0.125 MS Brown iron ore 22-32 1-4 2.72 Usability pisolite 5-9 hematite 9-12 5-20 2.02 - hematite 0.5 ~ 3 magnetite - 30 0.21 Poorly soluble magnetite 0.25

In the case of using a lot of the iron ore described above in the conventional technique for producing a sintered ore has the following problems.

First: a lot of pores in the iron ore itself requires a lot of water, and thus a lot of heat is required, thereby increasing fuel costs.

Second: Many pores of the iron ore itself form huge cracks during the sintering process, and the assimilation rate is high and melt fluidity is low, so that the fraction increases and the strength decreases.

Third, the production of sintered ore is reduced by lowering the speed of the sintering machine due to the decrease in air permeability due to the addition of the iron ore.

The present invention has been made in order to solve the problems of the prior art as described above, by mixing and charging the upper light and raw materials (low-grade light distributed in the lower layer of the bogie) used in the sintering process to improve the quality and increase the production of low-grade light It is an object to provide a mixing apparatus for a sintering machine that can be increased.

According to the present invention, in order to achieve the above object, the sintering mixer for mixing the upper light and low-grade light charged on the sintering bogie of the sintering machine for firing the raw material for sintered ore to manufacture the sintered ore is a plurality of blades A mixing means including a shaft spaced apart from each other by a predetermined interval and rotatably installed across the sintered trolley at a charging position of the low grade light, driving means for rotating the shaft of the mixing means, and the driving means. Characterized in that the power transmission means for transmitting the power of the mixing means.

1 shows a typical sintering machine.

2 is a view showing a state in which a sintered trolley loaded with a compounding material is transferred according to the conventional embodiment.

Figure 3 shows that the mixing device according to an embodiment of the present invention is installed on a sintering machine.

4 shows a mixing device according to an embodiment of the invention.

5 is a flow chart showing an operating state of the sintering machine according to an embodiment of the present invention.

<Description of Symbols for Major Parts of Drawings>

200: mixing device

200b: universal joint

200c: Geared Motor Base

200d: switch box

200e: Timer

200f: mixed blade

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention as follows, the same configuration will be given the same reference numerals.

First, the technical configuration of the present invention for solving the conventional problems as described above, as shown in Table 1, when loading the sintered raw material 111, the brown iron 112 has a large particle size and the lower end of the balance 108 Since it is located at, the mixing of the upper light and the iron ore by installing a mixing device at the point where the upper light 104 and the iron ore 112 meets.

That is, in the sintering mixer 200 according to the embodiment of the present invention, as shown in FIGS. 3 and 4, the height of the mixing apparatus 200 can be adjusted according to the variation of the stacking height of the upper light 104. The geared motor base 200c, the universal joint 200b for transmitting the power of the geared motor to the mixing blade 200f, the rolling bearing 200g for supporting and rotating the mixing blade 200f, and the starting selection of the mixing device can be selected. Switch box 200d, a timer 200e for detecting starting of the sintering machine, and a mixing blade 200f for mixing the upper light 104 and the brown iron 112.

The mixing device 200 is configured to install the two 10t plate on the geared motor base so that the mixing device can be adjusted according to the change in the stacking height of the upper light 104 so that the mixing device can be vertically adjusted, and the mixing blade 200f is The hard facing treatment reduces wear when the top light 104 and the iron ore 112 are mixed.

The operation of the mixing device having the above configuration is described below with reference to FIG. 5.

First, when the sintering machine is activated, the sensor-driven timer 200e detects this, and the geared motor rotates to transmit the rotation driving force to the universal joint 200b, while the crank shaft rotates, and the mixing blade 200f installed on the crank shaft is sintered. Rotation of the bogie 108 in the reverse direction to mix the upper light and the brown light, and when the sintering machine is stopped, a stop signal is detected by the timer (200e) and the mixing device (200e) is stopped.

When the upper light 104 and the iron ore 112 are mixed and charged to proceed with sintering, the amount of iron ore melted with respect to the same amount of CaO increases, so that the concentration of Fe ₂ 0 ₃ increases, thereby lowering the melting point and fluidity. .

Low melting point results in less calorie consumption, resulting in lower fuel costs, stronger strength, lower fraction, and improved sintered ore quality.

Looking at the sintered ore fraction and intensity before and after the present invention according to the change in the iron ore blending ratio as shown in Table 2 below.

TABLE 2

Limonite Compound Ratio (%) Fraction burglar Before Invention After Invention Before Invention After Invention 0 29.8 29.7 91.0 91.2 10 31.1 30.0 91.1 91.2 20 31.7 30.1 90.7 91.0 30 32.3 30.0 90.1 91.1 40 32.7 29.9 89.9 91.2

In addition, looking at the fraction and intensity of the sintered ore according to the upper light mixing ratio when using 40% of the iron ore, as shown in Table 3, it can be seen that the mixing ratio of the upper light is about 8 to 10%.

Table 3 (fixed to 40% Limonite)

Upper light compounding ratio (%) Fraction burglar 2 91.8 90.2 4 90.8 90.3 6 90.4 90.6 8 90.2 90.7 10 90.0 90.8 12 90.2 90.2

Therefore, as described above, when the raw material is loaded into the sintering machine trolley 108, the mixing apparatus 200 capable of mixing the upper light and the brown light at the point where the brown light 112 and the upper light 104 meet is installed and started to mix. By charging, it is possible to prevent quality deterioration caused by using a lot of low grade light to improve the quality and to reduce the fuel cost and to improve the productivity.

That is, according to an embodiment of the present invention, when the low-grade light is added to increase the pore appearing in the sintering operation is required a lot of water, the fuel cost increases and the melt fluidity is lowered accordingly to solve the problem that the fraction of the sintered ore is higher and the strength is lowered By mixing 8-10% of low-grade light and upper light, the melting point of the solution is lowered and the fluidity is increased, thereby reducing fuel costs, lowering the fraction, and increasing the strength, that is, ensuring the quality of the sintered ore.

Therefore, in order to realize this, according to an embodiment of the present invention, a sintered ore (upper light) having a particle size of 15 mm or less cut out from the upper optical wave 104 in the lower portion of the trolley 108 to a thickness of 40 to 70 mm and a surge wave thereon. The sintering machine balance charging device in which the compounding material 111 is charged at (103) is a low-grade light (monite ore) 112 has a large particle size and uses the characteristics of the lower layer of the charge by using the characteristics of the low-grade light and the upper light at the point where Install a mixing device 200 that can mix the upper light.

In other words, the mixing device 200 is a mixing blade 200f installed on the crankshaft while the crankshaft is rotated while the crankshaft rotates when the sintering machine is activated and the geared motor is rotated after the sensor-driven timer 200e is detected. ) Is rotated in the reverse direction of the sintering machine bogie 108 to mix the upper light and the brown iron ore.

Therefore, according to the present invention, a device capable of mixing the upper light and the low-quality light distributed in the lower portion of the bogie is installed before the ignition furnace and charged by mixing to secure air permeability, thereby improving sintering quality and productivity.

The foregoing is merely illustrative of preferred embodiments of the present invention and those skilled in the art to which the present invention pertains may make modifications and changes to the present invention without departing from the spirit and spirit of the invention as set forth in the appended claims. It should be recognized.

Claims (4)

In the sintering apparatus mixing apparatus for mixing the upper light and low-quality light charged on the sintering bogie of the sintering machine for firing the raw material for the sintered ore to manufacture the sintered ore, A mixing means including a shaft having a plurality of blades spaced apart at predetermined intervals and rotatably installed across the sintering cart at a charging position of the low grade light; Drive means for rotating the shaft of the mixing means; Mixing apparatus for a sintering device, characterized in that consisting of a power transmission means for transmitting the power of the drive means to the mixing means. The sintering apparatus of claim 1, further comprising sensing means for sensing an operating state of the sintering apparatus, wherein the driving means is operated by a sensing signal of the sensing means. The sintering mixing apparatus according to claim 2, further comprising up and down adjustment means for adjusting the height of the shaft according to the layer of the sintered ore, wherein the power transmission means includes a universal joint. The mixing apparatus for a sintering machine according to any one of claims 1 to 3, wherein the driving means rotates the shaft counterclockwise with respect to the traveling direction of the sintering cart.