JPS5953636A - Method for producing sintered ore - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to straightness of sintered ore production which promotes sintering raw material layering and improves the productivity of sintered ore.

Manufacture of sintered ore silk, conventional/i-book version 1. J: 1 Tearo iron ore E 1, mill scale, blast furnace guest, converter dust Mj
The iron-containing raw material and the powdered limestone which is the secondary raw material 1: The powdered coke black as the IJh fuel for IS sintering are mixed in a specified proportion, and quicklime is added as a binder. :fli'／, し, this construction)'+)
The material is sintered using a wafer sintering machine.

Adding quicklime to the above-mentioned sintered raw material is extremely effective in promoting the sludge formation of the raw material and increasing the productivity of the sintered ore.

Figure 1 is a diagram showing the process of adding quicklime to the sintering raw materials. 1 is a rotary kiln, and limestone is burned in the rotary kiln 1 to produce quicklime, and this quicklime is crushed into pieces of 5 mm or smaller by a crusher 2, and then stored in a hopper 3. The ashes of the cows (1) in the potspar 3 are taken out as appropriate and transported by truck etc. to the sintering 4i!i listing, and then supplied to the hopper 4 in the sintering 1 and JI.

5 is the main raw material storage hopper, G61 powder coke lri storage hopper, 7 is the limestone storage hopper, -1-raw 1"
1, coke powder, limestone and quicklime U'', each of the above-mentioned holes, 9-forces, and the prescribed cutting-out 1. −C=+
Miki v −jl K fJt hr+
t and MiA-+j-(-1-Qii combined'fM branch,
fI. Next, 1) The original material granulated by the granulator 9 is transferred to the sintering machine 11 by the conveyor 10. 7 cho nawarei).

For l(goi-i I!), -general・t5'
ε connection 1″ C, distance from 1 21 lime 1: Jjj, made with f
After being produced in the rotary tank 1, it is charged into the mill 9.

As a result, the activity of quicklime or wind (11: t is low at 1
・The production rate of sintered ore has deteriorated.

The inventors of the present invention determined that between the above-mentioned times, 11 and 11, the fire activation and f'1 degree low temperature were prevented.
'1+' of raw ore ('> rate 1: ';si IXI Z
) Table 1 shows the results of the investigation on the weathering state of quicklime.

Low activity like 11th+4, f-″11 of beef i1 ash
Hebuko according to σ. Figure 2 (a) and (b) are one large raw stone red +
1, 1 graph of the relationship between the number 1111 and V119.
'/degree is 0 to 5 city cow II ash, same figure (I]) (month-1
5. It is quicklime with a 1 degree or 2 to 5 mm thickness. As can be seen from the drawing, in Figure 2 (a) 4) The grain size is O~
Compared to 5 mm of quicklime, the same figure (b) shows J-5.) It is either t-1 degree or 2 to 5 mm, which is the size of a stone, and the activity is low.

The inventor'''1 has conducted research on this point since 1991, and
7S ro 4j (4 and 1) 11 J'm 1 degree (7J) 'Ig ('i ash kc, j L of sintered ore
(, Production rate ro・rl, to l/.-6th: 31″!, 1 is 1
゛9゛1 degree different 11〕1 degree showing - 1 graph, Figure 71 ke, J, '(::1 grinding/It 1) fire υyo)
i'f and raw cattle production rate are 71 (-zugutsu゛).

As shown in Figure 2 and 2, the amount of quicklime is 1 degree or less, and its 1 value is 1.
/1 degree becomes higher, and the raw ore of t't'g condensation is also the same. The L'l 1+ has a small amount of quicklime T5.
For example, when storing in a hopper, the storage method f, jI, -4
It becomes dense, and it is difficult to avoid fire.

This invention has been made based on the following findings: 1. Add quicklime as pine goo to 4"l of Yuhara, mix 1'\'l, and make this book.
7. In a method for producing sintered ore, which is sintered with a green machine,
v [1st article! (By adjusting the activity of lime and its particle size, the activity is close to that at the time of production, and this production 1
1. The quicklime in a state close to the activity of lr is added to the j:l'U
"Yuhara": It is a J-J product that is unique in that it is made by adding M to the mixture.

Next, this invention will be explained with reference to Examples ((1) and Explanation 1.
reactor.

Figure 5 is a graph that examines in detail the relationship between the grains of quicklime (q) and the activity of the quicklime for the number of days that have passed since it was made.
The activity level of the fresh ash of 1 degree or more than 0.25 mm is '(60cc/4 N-■(c). (+, Show the relationship between the proportion of quicklime and the production rate of sintered ore over 25 rn7n). In addition, quicklime (3'l
The blending ratio is 2.0% and A2. As is clear from the drawing, 75 i, f'i:::j (10% of the ash containing 0.25 am or more was used. When the production rate of crystallized ore is revealed,
Pl's "direction 1") power - (came).

1 mentioned here and here [), +:ya connection II;
At the same time, 11% of the raw ash contained in the mixture was added to the above-mentioned 25 ton'L 11% ash.
i) By this, the raw sintered ore I) (-bar direction 1 /
', things will happen.

In order to make raw stone 1 fire T9 (force of 1.25 mm or more; 25 times more than 10 and 4: 14),
-Ta'J -1 = Run, j:Ilv was made/After this quicklime was crushed by a crusher, it was crushed by T11! ! (
Sieve it by 1) and adjust it so that the degree of j, j, lj is 4) higher.

Next, another example of this invention is 1jOi. Let's discuss an example.

In this example, in the culm diagram shown in FIG.
7; Conclusion field Vcilf jl @ i%bukogyu(if fire, filshi(i174 k,' 12 in ilF
Break 1i'+! After that, the ashes of the cows are charged into the mill 9 and sent to the 316 crusher 12. The crusher 12 comprises, for example, two cylindrical outer bodies that are fitted into each other and are supplied into the housing from a number of iron rods. I, f-i, etc., are used for rough crushing.

In this example, at 4°, 1-ft pH < ll
(, (-J ash is charged into Miquily - Jro's ``111'' is crushed, so the active surface of the ash charged into Migi2 is exposed due to the crushing, and therefore its active surface is exposed.) The active body can be stirred 1" in the direction.

Figure 2 (a) and (b) show i [1 after manufacturing as described above.
The activity level decreases with the passage of time, and when 21 pieces of quicklime (Tsukita) is crushed to 60 degrees F or more, the activity level is 111 degrees, which is shown by the x mark.It is clear from the drawing. /?
: 2~31-1 red filtration after z production 1 degree is extremely low I・C, 1 fire stone also breaks this 6/, '+4-
By doing so, it has been possible to restore the antiquity to 1, which is close to the production IL'r.

Table 2 shows the activity of quicklime with and without crushing treatment, and the activity of quicklime with and without crushing treatment, and this ash mixed with the sintering raw material at a rate of 2.0%. The grain rate and tumbler strength (T, 1.) of the raw ore are shown.

The blending ratio of quicklime to the sintering raw material is ηII<2.0%, as described above, and is expressed by the following formula: %=f=-υ.

Iron-bearing raw mineral 1 + stone 1 flint” - quicklime - 1 - j-smine - 1 -
From the above, it can be seen that if 'lJt' of '1. If you want to learn the rate, you can get zero at 1-).

Table 13 shows that J:l't,
Addition of 1. - CI description fc
>': is the degree configuration J, / is the case of the present invention subjected to crushing treatment, and V = conventional case a without such treatment. A comparison of the average 1'\'I diameter, 43yo, the production rate of sintered ore, and the tumbler strength 1α (T, I) before and after js knee 41'7 is shown.

Table 3 As is clear from Table 3 above, by adjusting the l, :V′i, degree of quicklime, its 1m degree increases, and the production rate and tumbler of sintered ore increase. It is possible to improve strength.)

1-As mentioned above, is it possible to adjust the particle size of quicklime by sieving or crushing it according to the method of this invention? ) When you are ready,
It is possible to increase its activity and increase the production rate of sintered ore by 1. It is possible to store l1Ij + in a container and maintain the activity at a state close to 1σ at the time of manufacture and charge it into a mill. The 11 marks in Figure 21 (a) and (b) indicate the activity of the quicklime made in this way.
The degree of ionicity did not change much from that at the time of manufacture.

1- In the above explanation, active'[411 degrees is /IO°C
of water 21K5F' 1g of quicklime (Ca, O) was added;
Titrated with Cl solution and used AN-HC1 solution. Mani tumbler strength (T, I) is the diameter!
l ] 4 mm, length/1577BH1)" length 6
mm drum inner circumference K)1 (Wave roller lI5 in diameter JJ direction
0mm, I ￥ 6 g 2 blades
A rotating 1 inch ram is required, and a 1 inch rotating drum is required.
3 kg of sintered ore with a particle size of 0 to 25 mm per person 1.1 min 2
2 at a rotation speed of 71 times (10 m after 10 rotations)
The sintered ore having a temperature of 1-57 degrees is indicated by a certain percentage of k. ll4 production rate, pallet grate of sintering machine] r
+ of 5 mm or more in 1 hour per r+j: S'
I rent raw ore from condensate.

As explained above, this invention method θ, Nko, 1- is quicklime with a high degree of activity during the reaction.
By adding -4゛, the ll: production of sintered ore was increased.
) 7's advantage 1 can be manufactured with high L raw ore I+ 4 < high, -! 7'%,,,1. ', Work [Excellent effect Song?'
1) Be forced to fc.

[Brief explanation of the drawing]

Figure 1 shows the mixture of quicklime in the raw material for sintering, and culm diagram, Figure 214 (in (b) shows the amount of red 1" of quicklime and 1" of live lime.
-1 graph shows the relationship between 1a, Figure 3 shows the relationship between quicklime thickness and active V1 degree, and Figure 4 shows /11 lime i::r, I! Figure 5 shows the relationship between the particle size range of quicklime and the activity level, Figure 6 shows the relationship between the grain size range of quicklime and the activity level. 43 in quicklime (,), 2! 'l mm, LJ, 1・
'141i j (1-'s i, no's a'l'fin
This is a graph showing the relationship between raw ore production. Drawing KJ3V/'1, 1 Rokurigirun, 2・(
IIq crusher, 3. /I, 5°0.7 Bonno? -1
8,1 (1...-1 nbeno', 9 mihe-→] -,
1 1 Light ε Thread reading machine 1, 2nd, (A) ('O) No., '3 Fig. 4 Fig. 1) Fig. 209-I L L (mm) Procedural Sleeve Book (Spontaneous) illjl! 1fζ 1 , □ 14ii′1・
Exploring Yamacho'11 O'l Sugi +]l ノ,
1 in 2 zu [= Ming name method for producing sintered ore 3, iii +1 in the name 'il'l' Patent applicant jl'111j Tokyo ° Miyako [1J-ku Marunouchi-1]
Monthly No. 11, Ji [I, ;, -1 (F7. ■), ) 11 Wood Steel Pipe Co., Ltd.? 1st representative Kim Nagisa Ff'
Edited by +11 Akito I11? +, ij+'r'white, invention rl' III f(,:i(scream 1t"+珀, 1 to 1st i+i+'fl, [!1i1t)(Toaru 41,"fil' if... (2) Mei 1101:, 10th White, Invention Hinoki π ()
1na;i (1明の」■1.1kaf, P4'1.j l
・1J "1, [-□゛, 1\7ji-jin J), -1 and wo-[/; eight to nine people IIs J and Fil' il zuro" So, l

Claims (1)

[Claims] In the sintering raw material, a binder and 1. In the method for producing sintered ore, the quicklime is mixed and granulated, and the granulated product is sintered using a sintering machine. The activity is brought to a state close to that at the time of manufacture by stirring, and quicklime with an activity close to the time of manufacture is added to the sintered raw material and mixed and crushed.
A method for producing sintered ore, characterized by: