JPS59116307A - Method and device for sampling of piled charging raw material in packed layer in blast furnace - Google Patents

Abstract

PURPOSE:To obtain a sample which reflects faithfully the distribution characteristic of the packed layer of the piled charging raw material layer in a furnace by inserting a hollow cylindrical body which is opened by a sharp pointed end edge through the opening provided in the furnace wall. CONSTITUTION:A hollow cylindrical body 1 which is forcibly penetrated through the opening in the furnace wall, into the packed layer of a piled charging raw material and a measuring means which measures the margin for insertion of the body 1 into the furnace and the length at which the piled charging raw material is introduced into the body 1 are provided. The body 1 which is opened by a sharp pointed end edge is inserted into the furnace and the packed layer of the piled charging raw material in the furnace is introduced into the body 1. The margin for insertion of the body 1 into the furnace as well as the length at which the piled charging raw material is introduced into the body 1 are measured. The position of the drawn sample is thus securely detected and the operation of the blast furnace is effectively controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Technical field to which the invention relates: The present invention relates to a method and apparatus for sampling raw material slag charged in a blast furnace. Input raw materials such as coke, sintered ore, pellets, and sized ore are deposited in the furnace during operation, and during this time, operational efficiency is improved, such as by lowering the fuel ratio, melting, etc. In order to stabilize the quality of the product, including the slag, it is essential to optimize the properties of the phosphorous layer of the charged raw material deposit. It is necessary to optimize it.

For this reason, during wind breaks, the openings and
...For example, the above-mentioned charging material deposits are collected from the siding area and analyzed to find out changes in the properties of the packed material relative to the charging material before charging, and based on this, operational operations aimed at improving properties can be carried out. Manipulative actions such as changing conditions are being implemented.

However, when collecting the charging raw material deposit from the in-furnace optical layer at the opening, a large vertical load is moving relative to it, so conventionally the collection has been mainly carried out at a very close position near the opening.

By the way, the condition of the debris inside the blast furnace was revealed through a recent excavation of the remains of a blast furnace, and it was found that the situation in the blast furnace was not only in the height direction but also in the radial direction (in a certain horizontal cross section). It is certain that there is a distribution in the photic layer properties of the charged raw material deposits.Therefore, recently, sampling pipes consisting of hollow cylinders that open with sharp trenches have been used. SP) on the wall of the blast furnace INIL! It became necessary to sample the taste of the charging material (d material) up to the vicinity of the center of the blast furnace by press-fitting it toward the porosity layer in the furnace through the opening opened at N', 2. I came.

However, the problem here is the cost of entering the SP into the furnace.
) The introduction length of the sample taken into the SP does not correspond to the above-mentioned inflow and outflow. In other words, for example, even when the SP is moved 5 m into and out of the furnace, the introduction length of the sample collected into the SP is at most 8 to 4 mL is enough. On the other hand, the press-fit resistance of SP, which is considered to be related to this introduction length, is not thought to be proportional to the increase in the depth of press-in, even though it corresponds to the increase in the depth of press-in.
Even if you try to analyze the properties of the photonic layer in the radial direction inside the furnace using i%, it is not possible to control the occupied position in the furnace of the sample for each division by simple proportional distribution, and it is difficult to accurately grasp the situation inside the furnace. It doesn't matter what you did.

Purpose of the Invention In order to solve these problems, the present invention provides a method for accurately measuring the position of collected samples in blast furnaces.
i 4'a sampling method and its □ fruit”
Ai has 1 spit ff 1 year old sampling M jJ # F
Proposition = @Electric thing.

611 of the invention This invention provides a method for forming a sharp j'
J? Inserting the hollow cylinder that opens at f into the furnace (C
Yo I) The above charged raw material + a phosphor layer inside the furnace? When introducing the sample into the hollow cylinder and collecting the sample, the amount of penetration into the hollow cylinder is equal to the amount of injected raw material inside the hollow body. A sampling method that achieves the above objective by accurately measuring the area 1d occupied by the sample in the furnace, measured along with the introduction length of '=1, and according to the I11 correlation of both dimensions. Also, by following this at the opening of the furnace wall of the blast furnace, the charged raw material and the pile (1゛) are placed in the furnace wall ((+hh) and the hollow cylindrical body , a total of 11 means for measuring the amount of penetration of this hollow space body into the furnace together with the length of introduction of the charge material deposit into the γd ore furnace; The device Q advantageously realizes the above method 2).

Figure 1 shows an example of a hollow cylindrical body and its press-fitting means for sampling plants to be installed in a blast furnace, and has a sharp edge]'
The hollow cylindrical SPI, which opens with The deposit of charging material that has been deposited in the tank is introduced from the side of the light chamber. -5 out of 1 is lining brick.

After the sample is collected as described above, the piston cylinders 2 and 3 are contracted in reverse so that the collected sample is pulled out of the furnace together with SPl while maintaining the introduced position within SPl.

In this invention, the occupied position in the furnace of the sample introduced into the SP can be accurately determined as follows. , the inner end of the measuring rod 6 has an SPI of 1i.
! A striking plate 6' with a relatively narrow gap relative to the ilK is provided, and a through hole 17 is provided on the outside of the furnace in the end cover 1'' of the SPI.
Make it more prominent and beyond! /J is equipped with guideline 7, SP
This corresponds to the scale plate 8 whose one end is fixed to the end cover 1'' of I.

On the other hand, for 5PIK, a pointer 9 is roughly attached, and one end of the steel shell 4 is matched with the identified scale plate 10. is that nP thin F;
Figure 113 (al, (bl), Figure 4 (at, (b)
l As shown in K, Persimmon Shakkui 6 has resistance r, r in SPI.
Although not shown in the figure, the presser plate 6', which is provided with a width of 8 or a pair of left and right bundle widths 11, is movable.
In order to facilitate the passage of N2 gas, which is supplied into the Pl and controls the cooling of the sample, a gap is provided between it and the inner surface of the SPl, and if necessary, it is made of gold fl'4 or the like.

Now, this SPl is pressed into the furnace as shown in Figure aI1 (f) and the charging material deposits are introduced into the furnace from the tip of the SPI, and when the SPI is If the movement resistance of the zero measuring rod 6 pushed out from behind is large, there is a risk that the introduced sample will come out and damage the total 71JIl diameter, so it is advantageous to attach the claw shaft 11.

Also, if the above moving resistance is less than 5 kgf, is it a measurement? ! The movement of 6 faithfully reflects the introduction length of the sample and the above σ
) does not result in a compression such as I''4.

Embodiment According to a specific example of the sampling method in which the sampling device according to the present invention was used on a monthly basis, SPI was injected through the tuyere during a shutdown of the blast furnace, and the scale when charging raw material deposits were sampled from the kerosene layer inside the furnace. By plotting the readings on plates 10 and 8, the results shown in Figure 5 were obtained.

When SPl is located at the tip of the tuyere, the reading on the scale plate 10 is 1.0 m, and considering this, SPl is 5.0 m.
When 5 m - 1 m = 4.5 m is press-fitted into the photoreceptor layer, the length of introduction of the collected sample into the SP is 8.1 m from the reading on the scale plate 8, and the length of the sample introduced into the SP during this period is 8.1 m. The position occupied by the sample in the furnace can only be clearly understood in accordance with Section 6A.

The sample collected in SPl is 200%
Figure 5 shows the furnace temperature estimated from the degree of coke graphitization for each component by dividing it into sections. The results are plotted against the recognized in-furnace position, and are summarized in Figure 6. According to Figure 6, the rapid drop in furnace temperature at a depth of 1 m or more from the tip of the tuyere was confirmed by a rod test during operation, and the raceway was 4/: 1111.1 m. Correspondingly, this σ) is the first man's grasp of the sample location.
It can be said that the n degree corresponds to the actual situation inside the furnace.The effect of this invention is to create a barrel that faithfully reflects the distribution of the top layer of the raw material deposit in the furnace of a blowing furnace. Input material pile 4J
Can pass the f b'i exam and also be able to pass it
It is possible to realize the desired extraction, and the fllIl ritU of the blast furnace's 1.vI operating conditions by f'L is (
Industrial efficiency - H, effective things and skills 2, capable of 0 4 drawings + r1t t (ri, ill Figure 1 I O, blast furnace interior worker J1d material σ) Collection procedure explanation Figure 1, 21, 6
(al is an explanatory diagram showing the position occupied in the furnace of the collected sample according to the present invention), corner
Figure 2 (b) shows 1A and IA from the A viewpoint.

Figure 8 fa), fb), self [Figure 4 (a), (b
) is the measuring scale Q ((17) Detailed 14゜〜 Figure 5 is a graph showing an example of the rit mill results according to this invention, Figure 186 is an estimated diagram showing the correspondence between the Zambre analysis value and the furnace internal situation 17) 0 1...Hollow cylindrical body (SP) 4...Blast furnace shell 6...
- Measuring scale 1i41? , 9...guideline s, io・-
・Scale plate.

Patent applicant: Kawasaki Steel Corporation Figure 1 Figure 2 Figure 3 <a> <b) Figure 5 Figure 6

Claims (1)

[Scope of Claims] 1. Fukuroto raw material pile (molten ore that formed a phosphorous layer in the furnace of d-products)
Placed on the liver wall! The sharp FR6 through the opening
By receiving the hollow cylindrical body opened in the trench into the furnace, the above-mentioned charging material is deposited in the white furnace interior. 7 to the inside of the hollow body to collect the sample, the length of the inside of the furnace of the hollow cylinder is calculated as follows: According to the mutual relationship of dimensions, the composition of the deposit in the blast furnace, consisting of exactly one position occupied by the sample in the furnace? Pulling method. 2. A hollow cylindrical body that penetrates through the opening of the furnace wall of a blast furnace and is injected into the light layer of charging material deposits in the furnace, and the amount of penetration of this hollow cylindrical body into the furnace. a measuring means for measuring the length of introduction of the charging material deposit into the body;
Sampling device for deposits charged in the molten metal layer inside the melting furnace.