JPS58102089A - Scraping device for hearth of rotary hearth type furnace - 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 provides a rotary hearth type heating furnace (hereinafter simply referred to as a furnace) in which a granular refractory material is spread over the hearth. This is a device for adjusting and leveling irregularities that occur in the granular refractory layer on the hearth surface. Even if the effect of the taming method is insufficient, a sufficient taming effect can be ensured.
The purpose of the present invention is to propose a hearth raking device that can obtain high energy and IK.

Conventionally, the hearth of a rotary hearth type furnace is made of a flat refractory structure made of refractory bricks, refractory plastic, castable, etc., and is pulled over by a mulberry tree, on which heating objects are placed at regular intervals to heat the hearth. There is.

However, in recent years, heated objects have become larger and heavier, and 1! As the throughput per unit time increases in order to improve installed capacity, there are many cases where the furnace has to be stopped due to damage or molding of the hearth. There are problems such as uneven heating if left on the stove. Konoyo 5
As a measure to eliminate uneven heating, skids or vias made of large-sized materials are protruded above the hearth, but these have problems with fire resistance and scale removal.

As an alternative to this, a diameter of 10~ on the hearth! 01E
No. 11 Granular refractories are tied together and heated objects are placed on top, but the weight of the heated objects causes unevenness and irregularity on the surface of the refractories. For this reason, if the outer diameter of the heated items differs, the charging pitch will be different, so the heated items may fall to one side, line up irregularly, or come into contact with each other. If something like this happens, the temperature of the heated material may become uneven, or in severe cases, it may become impossible to extract the heated material. Therefore, there is a fee to change the outer diameter of the heated material or the charging pitch, to scrape the granular refractories, and to flatten the hearth surface.

In order to solve this problem, we have already developed a hearth stirring device for a rotary hearth type furnace (411 Kaisho ZS-Q Cottg).
has been proposed, but the following problems still remain with this device. For example, if the hearth surface becomes concave and the size of the concave is smaller than the grains of the refractory, or if the refractory is baked or compacted, it becomes extremely difficult to level out the hearth. As a result, it will not be possible to achieve the desired effect.

The present invention has been made to solve such problems, and in addition to the conventional raking device, a device for digging up granular refractories is attached to the existing raking device to remove difficult-to-pound granular refractories. By digging up and loosening the granular refractory layer that has become IIk, it is easier to level out and improve the flatness of the hearth surface. The object of the present invention has been achieved by activating the material layer and extending its lifespan.

The gist of the device of the present invention is that, in a rotary hearth type heating furnace in which a hearth/k granular refractory is laid and tied together, a scraping plate is installed across the hearth in the compartment between the heating material charging port and the extraction port. In addition to the conventional hearth or leveling means in which the beer with the scraper plate attached is installed in a direction perpendicular to the rotation direction of the hearth, the digging of the present invention is carried out in parallel to the extraction port side of the heated material. After installing means and digging up the irregular hearth granular refractory layer,
This hearth raking device for a rotary hearth type furnace is designed to flatten the surface of the dug hearth using conventional hearth raking means.

The digging means newly installed in accordance with the present invention is equipped with a digging member for digging out the granular refractory layer on the hearth surface, and has a rotatable beer, one tip of the beer on the inner side of the hearth, which can be attached and detached. The beer tip supporting means is adjustable up and down and rotatably supported; the other is the swinging means which removably fixes the beer tip on the outer peripheral side of the furnace and is movable up and down and tilting; The beer supporting frame is equipped with a rotating means and is attached so that these means can be operated independently, and furthermore, the beer supporting frame equipped with such a digging function is similar to the above-mentioned conventional furnace. The beer support frame in the floor raking means is installed on a common traveling carriage that can move forward and backward to constitute a novel hearth raking device.

Next, the apparatus of the present invention will be explained in detail with reference to drawings of specific embodiments.

As mentioned above, the device for leveling the surface of the granular refractory layer of the hearth according to the present invention is equipped with a new digging means in addition to the conventional scraping means, thereby very effectively improving the granular refractory layer surface of the hearth. Figure 7 shows an example of a rotary hearth type furnace in which excavation means and raking means are installed in parallel. 1 is a plan view of the floor raking device, FIG. 1 is a side view thereof, and FIG. 3 is a view taken along the line X--X in FIG. 2.

In the drawing, digging means C is installed above the hearth between the heating material charge OA and the extraction port B of the furnace, straddling the hearth at right angles to the direction of rotation of the furnace (arrow). The extraction port Ba1k is arranged for the hole, and the conventional leveling means is placed in the first place for charging. It is installed so that it is leveled by a leveling means.

The cylindrical beer 19 in the digging means Ck is installed across the furnace 3 at right angles to the rotating direction of the hearth, and its tip is
A removable beer support frame with a swivel bearing that can be attached and detached and adjust its vertical position and rotatably supports the tip of the beer! [Supported by both]. Outside 111i1 of this cylindrical beer plate, flc1 figure, tFII
The tapering member claws O are attached to the outside 111 in a staggered manner to match the width of the hearth as shown in Jk. Incidentally, Figure 4I is a sectional view of the inside of the furnace between the cold billet charging OA and the hot billet extraction port B, and is an explanatory diagram showing the operation status of the digging means C and the leveling means. It is. Further, the digging member is not limited to a claw as shown in the figure, but is not limited to any shape or mechanism as long as it has a digging function.

Beer support frame/jk is 1. The rotation drive means 19 as a mechanism for rotating the beer 19, the pinion 1J, the gear ivy, and the beer 19! Eccentric bearing as a swinging mechanism for adjusting the height and angle of 9. Eccentric cam l, cylinder 17
, a tilting bracket IQ, and a tilting part of a tilting jack// are attached to a traveling carriage 4 that can freely move forward and backward, which is common to the conventional leveling means.

The traveling cart 6 moves the beer 19 in and out of the oven, and is driven by a motor 24k on wheels on rails, and is fixed at a predetermined position by a rail clamp ty. In this way, the digging means C and the raking means are fixed to a common traveling trolley in parallel, and they move forward and backward at the same time, but the digging means C and the raking means The means of each part are installed so that they can be operated independently, so that digging and raking work can be carried out as required. It goes without saying that the digging means C and the raking means can be mounted on separate common carriages depending on the membership fee.

Beer 19 is also forcibly water-cooled to withstand the High 1 atmosphere. In other words, the cooling water pipe is connected to the frame l! The water that has passed through the center of the beer l de is released into the beer near the tip of the beer, passes through the inside of the frame j while cooling the beer /q from the inside, and is discharged into the funnel 13 at the rear end and drained into the drain. be led to.

Next, the operation of the device of the present invention will be explained. When heating a material to be heated, such as a billet, in a rotary hearth type heating furnace, the billet L charged from the heating material charging port A completes heating kj5rf while rotating in the direction of the arrow, and then passes through the discharge port. B is extracted outside the furnace, but the traces of the extracted billet are
There are depressions corresponding to the viresinization, and the surface of the hearth is irregularly uneven. (See Figure D) Also, while such heating work continues, the generated scale and molten material may adhere to the granular refractories S and become large lumps, or cause seizure. .

Alternatively, granules may stick to each other due to the weight of the billet. With such foreshadowing, the hearth rotates, and if the above-mentioned part reaches just below beer 190, beer/?
The surface of the hearth is dug up by the digging claws attached to and constantly rotating, the granular refractories j are loosened into pieces, and the surface of the hearth is made flat by the next raking means Dk. I'm being yelled at. Note that the depth of the digging will vary depending on the weight of the heated material l, as the weave of the recess will vary.

Eccentric bearing t and eccentric cam/A, cylinder mechanism/? Adjust the height so that there is no indentation. Therefore, the billets 1 that are newly charged from the zero charger are lined up on the hearth in a suitable shape regardless of whether or not the size is driven, and continue to be heated with uniform temperature. Sunarichi Peel! The surface of the granular refractory layer 3 of the hearth has been kept flat at all times and is ready to receive new billets.

If the granular refractories in the hearth have decreased, new refractories can be supplied from a hopper (not shown) installed at the top of the furnace to the front of the digging means. It is automatically stirred with old refractories, followed by flat hearth stirring.

As explained above, granular refractories are constantly activated by being dug up and stirred. For this reason, seizure and agglomeration of granular refractories are reduced, and a good space can always be provided between coarse refractories, allowing the passage of heated high-temperature atmosphere gas (as a result, heating temperature unevenness is further reduced). This greatly extends the life of a hearth lined with granular refractories.

[Brief explanation of drawings]

Figure 8g1 is a plan view of the entire device of the example, Figure 2 is a side view of Figure 1, Figure 3 is a view taken along line X-X in Figure 2, and Figure aR1 is a cross section between the charging port and the extraction port. Figure 3 is Y-Y in Figure 9.
It is night time. A... Charging port, B... Extraction port, C... Digging device, Leaf... Kakiarashi equipment [il, /...' Cold billet, Co... Hot billet, 3... Furnace wall, Da... Hearth, 3... Granular refractories, 6... Cart, 7.
...wheel, t...bogie clamping means, 9...eccentric bearing, lo...tilting platen), //...tilting jack, here...rotation drive means, /3-...pinio y ,i
p...gear, /, t...beer support frame, /A
...Eccentric cam, lr...Cylinder mechanism, 1g...
Side guide, /9...beer, :lO...digging member, top...swivel bearing, here...cooling water pipe, ko J...drain funnel, koda...rail, ko! ...
Rotary joint, motor. Patent applicant Kawasaki Steel Corporation Kinsha Figure 3

Claims (1)

[Claims] A rotary hearth type furnace lined with KV-shaped refractories is equipped with a raking plate installed in a direction perpendicular to the rotational direction of the hearth across the hearth between the heating material charging inlet and the extraction port. In the hearth surface stirring means, which is provided with a beer that has been stirred and a means for shaking the beer, the means is installed on the heated material extraction port side in parallel with the stirred beer and excavates the granular refractories on the hearth surface. a rotatable beer tip holder for rotatably supporting the tip of the inner circumferential side of the beer oven that is removable and vertically adjustable; The outer tip of the ml is removable! a beer support frame fixed to the base and provided with rotational drive means;
5. A means for digging up a hearth granular refractory layer, comprising: a rocking means for freely moving the support frame up and down and in an incline; A hearth raking device for a rotary hearth type furnace that is installed on a movable traveling cart.