KR100916511B1 - Method for producting sinter cake using input of return fine in sinter machine process - Google Patents

Abstract

The present invention relates to a method for producing a sintered ore in a sintering machine, and more specifically, to prevent pores deterioration of the wetted zone of the low-floor part during high-rise operation, by forcing the self-reflection of the small particles to absorb excess moisture to secure the blocked pores. The present invention relates to a method for producing a sintered ore by the low-layer semi-light input by minimizing the poor plasticity caused by the cohesive moisture thereby improving the productivity.

Sintered ore, Sintering machine, Iron ore, Semi ore, Upper light, Surge hopper, Drum feeder, Guide chute, Deflect plate, After high layer, Wet stand

Description

Method for manufacturing sintered ore by low-layer semi-light input {Method for producting sinter cake using input of return fine in sinter machine process}

1 is a schematic diagram of a conventional sintering machine process,

Figure 2 is a view for explaining a sintered ore manufacturing method by the low-layer semi-light input according to the present invention,

3 is a view showing a wet zone correction raw material charging device according to the present invention,

4 is a graph showing the temperature distribution for each windbox as a result of the present invention.

 <Description of the symbols for the main parts of the drawings>

3: surge hooper 4: ignition furnace

5: sinter machine pallet

6: main drum feeder

7 sub drum feeder 8 upper light hopper

9: self-reflecting hopper 10: guide chute

11: Cut off plate

12: deflector plate

13: subgate 14: main gate                 

15 iron ore raw material 16 self-reflective raw material

17: upper light source 27: damper (damper)

The present invention relates to a method for producing a sintered ore in a sintering machine, and more specifically, to prevent pores deterioration of the wetted zone of the low-floor part during high-rise operation, by forcing the self-reflection of the small particles to absorb excess moisture to secure the blocked pores. The present invention relates to a method for producing a sintered ore by the low-layer semi-light input by minimizing the poor plasticity caused by the cohesive moisture thereby improving the productivity.

In general, the sintering industry quantitatively cuts iron ore raw materials of 5 mm or less and iron coke powder in a heat ore storage tank, adds constant moisture to the mixing drum, temporarily stores them in the surge hopper 3 through mixing and assembling. When a predetermined amount is cut out by the drum feeder 6 and charged into the sintering machine trolley 5, the sintering machine trolley 5 passes through the ignition furnace 4, whereby the powdered coke is ignited to sinter the trolley 5. In the process of advancing the effective image distance, the sintered ore in the molten state is produced through the firing process.

FIG. 1 is a schematic diagram of a conventional sintering machine process. When the iron ore raw material 15 stored in the surge hopper 3 is cut out by a rotation of the main drum feeder 6, a deflector plate 12 is shown. While flowing through the inclination angle of the charged into the sintering machine bogie (5) and passed through the ignition furnace (4) of 1,200 ℃ or more as the upper layer of iron ore raw material 15 is ignited while the sintering machine bogie (5) proceeds the effective burn distance Through the forced suction method, the flame of the upper layer is burned into the lower portion, and the sintering ore is produced by firing.

However, since the post-rise operation is usually performed, the higher the post-layer, the poorer the pores are secured, and the sintering productivity is lowered due to a slower firing rate.

And while the sintering machine cart 5 advances the effective burn distance, the moisture of the raw material 15 agglomerates to the lower layer part by the forced suction method, and the pores due to excess moisture are blocked, so that the flame disappears during the firing process due to the uneven air flow. As a result, deterioration in sintering operation and deterioration in quality due to uneven firing have occurred.

Furthermore, when the iron ore raw material 15 is charged, a thick particle is loaded into the bottom of the sintering machine trolley bed 5 using the inclination angle of the direct plate 12, and the fine granularity is guided to the upper layer part 5 ) As the air is sucked from the lower part, it should be induced to secure the pores so that the speed of advancing of the flame ignited at the upper part is increased. However, in the conventional case, the particle size of the iron ore 15 is confronted and mixed with small particles. Negative pressure rises and productivity decreases also with the generation of the ventilation resistance by operation after high rise.

The present invention was devised to solve the above problems, to prevent aeration resistance due to the operation after high-rise, to induce the grain size segregation from the filling of the iron ore raw material into the surge hopper, and to the main drum feeder Even during cutting, the coarse grained iron ore raw material is first cut out with an auxiliary drum feeder and laid on the bottom of the sintering machine trolley. By inducing vertical segregation by using the inclination angle of the deflector plate, it is possible to secure pores in the sintered layer to increase the efficiency of the sintering reaction and to shorten the sintering time to improve productivity, and to produce a high quality sintered ore. The purpose is to provide a sintered ore manufacturing method by the input.

In the method for manufacturing the sintered ore by the low-layer semi-light input of the present invention for achieving the above object, the top light 17 is first laid on the bottom of the sintering machine trolley 5, and the particle size segregation in the surge hopper 3 is placed thereon. Put the opposing one of the iron ore raw materials 15 at an appropriate distance by using the auxiliary drum feeder 7, and lay the self-reflective raw material 16 on the bottom of the wet zone where water is agglomerated during the firing process. Small particles of the iron ore raw material 15 segregated in the size of the surge hopper 3 are charged using the main drum feeder 6.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 shows a sintered ore manufacturing method by the low-layer semi-light input according to the present invention.

The coarse iron ore raw material 15 of the iron ore raw material 15 segregated in the particle size of the surge hopper 3 is first placed on the bottom of the sintering machine trolley 5 and the coarse iron ore raw material 15 is transferred from the surge hopper 3. Charge at an appropriate distance using the auxiliary drum feeder (7) and the guide chute (10). Then, the self-reflective raw material (16) is laid on the low-floor wet zone, where moisture is agglomerated during the firing process. In the surge hopper 3, the small iron ore raw material 15 is charged using the main drum feeder 6 and the deflector plate 12.

As a result, fine self-glossy 16 is charged and agglomerated at the point where moisture of the iron ore raw material 15 aggregates when the pores are secured by proper particle size segregation of the iron ore raw material 15 and sucked from the lower part of the sintering machine cart 5. By dispersing excess water to secure pores that were blocked during the effective burn distance of the sintering machine cart 5, the air flow is good, the firing speed is increased, and the sintering productivity is improved.

According to the present invention, a distribution plate (not shown) is installed on the surge hopper 3 to form a 45 ° inclination from the top to the lower side, so that the iron ore 15 is granulated in the surge hopper 3 by the dispersion plate. The coarse particles roll to the lower places, causing the natural particles to segregate.

Further, the auxiliary drum feeder 7 which cuts out the iron iron ore 15 of the opposed iron ore raw material 15 has the same shape and length as the conventional main drum feeder 6, and the diameter is about one third.

In addition, the guide chute 10 is mounted to have a slight inclination angle, the angle can be adjusted to adjust the falling point of the iron ore 15, the control of the cutting amount is assisted through the two post-layer detection unit (11) This is achieved by controlling the rotation speed of the drum feeder 7.

The auxiliary drum feeder 7 and the guide chute 10 are located above the rear side of the main drum feeder 6, and the rotation direction of the auxiliary drum feeder 7 is opposite to the main drum feeder 6.

Meanwhile, referring to FIG. 3, the upper light hopper 8 and the self-reflecting hopper 9 provided on one side are divided, and the dampers 27 are installed on the hoppers 8 and 9 and automatically provided according to the raw materials. It is adapted to be switched, and some ore of oversize of the character secondary screen is filled in the upper light hopper 8, and the under size of the character tertiary screen is incorporated in the self-reflecting hopper 9.

The amount of cutout in the upper light hopper 8 and the self-reflecting hopper 9 is made by adjusting the heights of the respective gates 14 and 13.

As shown in FIG. 4, a graph showing a temperature distribution for each wind box is shown in FIG. 4 as a result of loading a raw material and manufacturing a sintered ore as described above.

Referring to this, it can be seen that since the firing temperature is rapidly increased in comparison with the conventional case in the case of the windbox 16, the sintering speed which is directly connected to the sintering productivity is greatly improved.

According to the present invention, regardless of the thickness of the raw material layer during high-rise operation, the firing rate is increased by securing the pores, and the sintering productivity is improved. The quality is improved by increasing, and the lower bed wet zone is constantly controlled during the sintering process, thereby preventing the occurrence of microlayers, thereby improving the yield recovery and the effect of the plastic failure can be achieved.

Claims (1)

The upper light 17 is first placed on the bottom of the sintering machine trolley 5, and the opposing one of the iron ore raw materials 15 segregated in the particle size of the surge hopper 3 is disposed at an appropriate distance using the auxiliary drum feeder 7. It is charged and placed thereon the self-reflective raw material (16) at the position of the bottom layer wet zone where moisture agglomerates during the firing process, and the small particles of the iron ore raw material (15) segregated in the size of the surge hopper (3) thereon. A method for producing a sintered ore by the low-layer semi-light input, characterized in that the charge by using a drum feeder (6).

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