JP2832104B2 - Charge sampling equipment in blast furnace - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charge sampling apparatus used for measuring a particle size distribution of a charge such as ore or the like charged in a blast furnace. The present invention relates to a charge sampling device for measuring a particle size distribution in a radial direction.

[0002]

2. Description of the Related Art In a conventional charge sampling apparatus, a rail is provided at the top of a blast furnace which is fixed in a substantially vertical direction toward the inside of the blast furnace so that the rail can move forward and backward along the rail. It consisted of a provided rod and a sampling box provided at the tip of the rod.

In order to provide the charge sampling apparatus having the above structure at the top of the blast furnaces, interference with charging equipment such as a hopper, a turning chute, and a large bell mounted on the furnace top has been a problem. I have to install it in the position. Therefore,
The sampling position of the charge is limited to only the inner periphery because the inner diameter of the blast furnace is as large as several meters to several tens of meters, and is limited to one point because of the lack of freedom in the structural movement of the equipment. However, in such a measurement, the particle size distribution in the radial direction of the furnace interior charge could not be accurately grasped.

[0004] On the other hand, in a blast furnace, it is said that when the particle size of the sintered ore used as a raw material is reduced, the reduction properties are improved, but the permeability in the furnace is generally deteriorated. However, the present inventors performed simulations using a gas flow model of the furnace temperature distribution and the pressure loss when the particle size and the particle size distribution in the radial direction were changed. It was found that when the particle size of the condensed matter was reduced, the gas permeability in the furnace deteriorated, but it was possible to improve the gas permeability by controlling the particle size distribution.

However, with the charge sampling apparatus having the above-described structure, the particle size distribution in the radial direction of the charge in the actual furnace cannot be accurately grasped as described above. It cannot be controlled and reproduced in the furnace.

Therefore, the present inventors have considered that a device capable of measuring the particle size distribution in the radial direction of the charge in the blast furnace is necessary, and have developed a measuring device therefor.

[0007]

SUMMARY OF THE INVENTION The present invention has been made on the basis of the above circumstances, and the gist of the invention is that a wire mounting shaft is provided at the left and right ends between two parallel metal plates, and a guide is provided at the upper and lower portions in the center. A wire concentration box having a shaft, a hanging weight, a guide rod slidably mounted in a hole formed in the center of the hanging weight, and a lower end of the guide rod. A sampling box, and a transfer wire is attached to the wire mounting shafts at the left and right ends of the wire concentration box, while a wire for hanging a weight on one of the central upper and lower guide shafts and a guide rod for the other. This is a charge sampling device in a blast furnace in which a wire for raising and lowering a sampling box attached to an upper end is laid.

[0008]

In the apparatus of the present invention, transfer wires are mounted on the wire mounting shafts at the left and right ends of the wire concentration box, and these transfer wires are passed through holes formed in opposing side walls near the top of the blast furnace. Provide. Thus, the wire concentration box, the hanging weight mounted on the wire concentration box, the guide rod slidably mounted in the hole formed in the center of the hanging weight, and the lower end of the guide rod The so-called sampling equipment of the sampling box provided in the blast furnace shall be suspended below the large bell in the blast furnace without interfering with the charging equipment such as the hopper, swivel chute, and large bell mounted on the furnace top. Can be. By operating (pushing / pulling) the transfer wire, the sampling device together with the wire concentration box can be moved in the radial direction of the blast furnace, thereby sampling the blast furnace interior charge while changing its position in the radial direction. Can be.

Further, at the sampling position, a hanging wire connected to a hanging weight provided at the same time as the transfer wire is provided in the hole of the blast furnace, and a wire for raising and lowering the sampling box attached to the upper end of the guide rod. , The sampling box is hung at a predetermined height, and the hanging wire is hammered by pushing and pulling the hanging wire, and the sampling box is pushed into the blast furnace interior charge. This allows sampling of the charge.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view of a charge sampling device in a blast furnace according to the present invention. In the drawing, reference numeral 1 denotes a wire concentration box, 2 denotes a hanging weight, 3 denotes a guide rod, and 4 denotes a sampling box.

As shown in detail in FIG. 2, the wire concentrating box 1 has two triangular metal plates 5, 6 arranged in parallel with wire mounting shafts 7,
8 and guide shafts 9 and 10 provided above and below the central portion, respectively, and are assembled by tightening nuts 11, while transfer wires 12 and 13 are attached to the wire attachment shafts 7 and 8, respectively.

As shown in detail in FIG. 3, the hanging weight 2 is formed by a thick metal plate 15 provided with a hole 14 penetrating through the upper and lower surfaces at the center, and is provided on the outer peripheral side of the upper surface. A wire hook 16 for hanging the metal plate 15 is provided, and a wire 17 is attached to the wire hook 16 so that the metal plate 15 can be hung horizontally.

As shown in detail in FIG. 4, the sampling box 4 has a sampling port 19 opened on the side wall of the cylindrical portion 18,
Body with bottom 20 formed in inverted conical shape and having fixed lid 21
A guide rod 3 having a pointed end is formed on the main body 22 by passing the center axis of the cylindrical portion 18 from the fixed lid 21 to the bottom portion 20 and fixed to the upper end of the guide rod 3 for lifting. Wire 23 is attached.

Next, a description will be given of sampling of the blast furnace interior charge by the charge sampler configured as described above. First, the guide rod 3 was slidably inserted into the hole 14 of the hanging weight 2, and the main body 22 of the sampling box 4 was fixed to the distal end side of the guiding rod 3 and attached to the hanging weight 2. The wire 17 and the lifting wire 23 attached to the upper end of the guide rod 3 are wound around the upper and lower guide shafts 9 and 10 of the wire concentrating box 1 so that the wires are not entangled.

Next, the transfer wire 12 attached to the wire concentrating box 1 is illustrated from the opening 26 provided on the side wall near the lower end of the large bell 25 of the blast furnace 24 to the opening 27 provided on the opposing side wall. Blast furnace using a skipping bar etc.
24, the transferred wire 12 is picked up by a winch (not shown), and a wire concentration box 1 attached to the tip thereof, a hanging weight 2 provided on the wire concentration box 1, a sampling box Pull in 4. Thus, the wire concentration box 1 is suspended in the blast furnace 24 by the transfer wires 12 and 13 while the hanging weight 2 and the sampling box 4 are suspended.

In order to move the sampling box 4 to a predetermined sampling position in the above state, the transfer wire 12 is used.
And 13 are pushed and pulled by the winch and the wire concentration box 1 is moved. At the predetermined position, the wire 17 and the lifting wire 23 are loosened, and the hanging weight 2 and the sampling box 4 are suspended on the charge 28, and
17 is pushed and pulled to hammer the hanging weight 2 and the main body 22 of the sampling box 4 is pushed into the charge 28. This push causes the charge 28 from the sampling port 19 of the main body 22.
And the sample material is collected.

As described above, the above-mentioned charge sampling apparatus can be used for the blast furnace 24 without any trouble on the top equipment such as the large bell 25 of the blast furnace 24.
In addition, by moving the sampling box 4 in the radial direction of the blast furnace 24, the blast furnace interior charge (such as ore) 28 can be sampled in the radial direction.

[0018] Then, when this apparatus was used and controlled by using an armor so as to obtain a particle size distribution obtained by simulation, it was confirmed that air permeability was improved even in an actual furnace. In addition, the grain size of the sintered ore could be reduced. In addition, since the grain size of the sinter could be reduced, the productivity and yield of the sintering plant could be improved.

[0019]

As described above, according to the charge sampling apparatus for a blast furnace of the present invention, the charging equipment such as a hopper, a turning chute, a large bell, etc., which is provided on the furnace top with a simple structure. It can be provided below the large bell in the blast furnace without interference. Moreover, the sampling of the blast furnace interior charge can be performed by changing the position in the radial direction, whereby the radial particle size distribution of the blast furnace interior charge can be accurately grasped, and the particle size distribution is controlled. Ore or the like can be charged into the blast furnace, and the productivity of the blast furnace can be increased.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a charge sampling device in a blast furnace according to the present invention.

FIG. 2 is an explanatory diagram of a wire concentration box according to the present invention.

FIG. 3 is an explanatory view of a hanging weight according to the present invention.

FIG. 4 is an explanatory diagram of a sampling box according to the present invention.

[Explanation of symbols]

1: Wire concentration box 2: Vertical weight 3: Guide rod 4: Sampling box 5, 6: Triangular metal plate 7, 8: Wire mounting shaft 9, 10: Guide shaft 11: Tightening nut 12, 13: Transition Wire 14: Through hole 15: Thick metal plate 16: Wire hook 17: Wire 18: Cylindrical part 19: Sampling port 20: Bottom 21: Fixed lid 22: Body 23: Wire for lifting

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-59-155757 (JP, A) JP-A-61-78852 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) G01N 1/04 C21B 5/00 302

Claims (1)

(57) [Claims] 1. A wire concentrating box having a wire mounting shaft at the left and right ends between two parallel metal plates and a guide shaft above and below the center, a hanging weight, and a centering portion of the hanging weight. A guide rod slidably mounted in the provided hole, and a sampling box provided at the lower end of the guide rod, and a transfer wire is mounted on a wire mounting shaft at the left and right ends of the wire concentration box. A charging method in a blast furnace, wherein a wire for hanging a weight is vertically attached to one of upper and lower guide shafts while a wire for raising and lowering a sampling box attached to an upper end of a guide rod is attached to the other. Object sampling device.