JPH0516190Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to slag processing technology, in which slag that is continuously discharged in large quantities from a blast furnace, etc. is received on an endless track from a slag outlet, transported and cooled. This relates to a slag conveyor that breaks into a predetermined size.

[Conventional technology]

Conventionally, slag discharged from a melting furnace with a relatively small amount of slag discharged at tens to hundreds of cc/min has been poured into a slag bucket as lumps and disposed of after cooling. However, the weight and volume of the lumps can become very large, and so they must be crushed again before being disposed of. Therefore, even if the slag is not reused, it is granulated in water, which significantly deteriorates the processing environment and worsens the working environment.

Conventionally, as a device to eliminate such granulation treatment of slag, a device has been installed so that the slag flowing out from the slag outlet of a blast furnace or the like or a slag gutter connected to the slag outlet is driven to rotate by a drive mechanism. A slag conveyor is used in which the slag is received and conveyed by a large number of cooling trays arranged adjacent to each other on an endless track, cooled during conveyance, and crushed into an appropriate size.

[Problem that the invention attempts to solve]

However, in this type of slag conveyor, the bottom plate of the cast iron cooling tray installed on the endless track is made thick, and the structure is such that it is cooled by air cooling, so it takes a lot of effort to properly cool the cooling tray. This required a large amount of airflow, making it unsuitable for practical use. In addition, in this type of slag conveyor, in order to eliminate the adhesion of slag to the cooling tray, a method was adopted in which a graphite-based coating agent was applied to the surface of the cooling tray where the slag had been discarded. Due to the protrusion or running conditions and the impossibility of stirring the graphite-based material and water, the mold coating agent cannot be uniformly applied to the surface of the cooling plate, resulting in problems such as being unsuitable for practical use. It was hot.

The present invention was developed in view of the above problem, and consists of placing a number of cooling plates adjacent to each other on an endless track constructed so as to be rotated by a drive mechanism, and placing them at the slag outlet of a blast furnace or the like. In the slag conveyor that receives and conveys the slag flowing out from the communicating slag gutter using the cooling tray, a cooling tray is provided that does not have slag attached, has excellent cooling efficiency, and can easily replace deteriorated parts. The purpose of this invention is to provide a slag conveyor equipped with

[Means for solving problems]

The slag conveyor of the present invention has a large number of cooling plates placed adjacent to each other on an endless track that is rotatably driven by a drive mechanism, and the slag flows out from a slag outlet of a blast furnace or the like or a slag gutter that communicates with the slag outlet. In the slag conveyor, which receives and conveys the molten slag by means of the cooling trays, each of the cooling trays is provided with a fireproof plate with a smooth surface made of a refractory material such as graphite on the surface of a metal substrate. The gist of the present invention is to have a structure in which the plates are fixedly attached to and detached from the endless track through simple attachment means.

Furthermore, a plurality of cooling fins may be provided protruding from the bottom surface of the substrate of the cooling plate, if necessary.

[Effect]

In the slag conveyor with the above configuration, the cooling tray that receives the high-temperature slag flowing out from the slag outlet has a structure in which a fireproof plate with a smooth surface made of a fireproof material such as graphite is covered on the surface of a metal substrate. As a result, the molten slag cools and solidifies on the surface of the refractory plate, and at this time, separation cracks are formed between the two due to the difference in thermal expansion coefficient with the refractory plate and the presence of carbides such as graphite. Therefore, solidified slag does not adhere to the cooling tray.

In addition, since the above-mentioned cooling dish has cooling fins protruding from the bottom of the board, the heat dissipation cooling effect is large in water-cooled or air-cooled cooling means, and the length of the endless track can be shortened. , the overall size of the device can be reduced, and the cooling tray can be moved at high speed, which reduces the thickness of the slag layer deposited on the cooling tray. At the end of the track, it naturally breaks under its own weight and is cut into small pieces.

〔Example〕

An embodiment of the slag conveyor of the present invention will be described below with reference to the drawings.

The slag conveyor of the present invention is constructed below the slag outlet 51 of one or more melting furnaces 50, and reference numerals 1 and 1 refer to a sprocket 3 and a drive sprocket 4 that are shafted at both ends of a machine frame 2. A pair of endless chains wound in parallel between each other, the chains 1,
A large number of cooling plates 5, 5... are arranged so that their ends are in close contact with the cooling plates 5 adjacent to each other in the front-rear direction between the cooling plates 5, 5...
... are each removably fixed via simple attachment means 6.

Each of the cooling plates 5 is made of a thin metal material with protruding edges 8, 8 on both sides, and a substrate 7 on which a large number of small locking protrusions 9, 9... are arranged on the plate surface. A fireproof plate 10 with a smooth surface made of a graphite-based fireproofing material or the like is placed on the plate surface of the plate, and when sintered, the fireproof plate 10 is combined with the above-mentioned small locking protrusions 9, 9... It is fixed and integrated inside the edges 8, 8.
The simple mounting means 6 includes a small hole 12 formed in the mounting edges 11, 11 integrally provided on both sides of the base plate 7, and a small hole 1 formed in the continuous plate 13 of the chain 1.
4 are connected and fixed through split pins 15, and the cooling plate 7 can be easily attached and detached using the split pins 15, 15 on both sides of the cooling plate 7.

Further, reference numeral 16 is a drive motor which is drivingly connected to the drive sprocket 4 and rotates the chains 1, 1 at an appropriate speed.
A waste bucket 18 for accommodating the layered slag mass b is provided below the waste end side B.

The slag conveyor with the above configuration has a drive motor 16
While moving the cooling tray 10 in the direction of arrow A by the chains 1 and 1, the slag outlet 5 of the melting furnace 50 is moved.
The molten slag a flowing out from the cooling plate 10 is
As the cooling tray 5 moves, the molten slag a flows down onto the cooling tray 5 at the rear, and the molten slag a on the cooling tray 5 gradually solidifies due to heat dissipation while the cooling tray 5 is traveling, forming a band-like shape. A continuous layered slag mass b is formed. However, the layered slag mass b is caused by the metal substrate 7
Because it has a structure in which a fireproof plate 10 with a smooth surface made of a graphite-based fireproofing material is placed on the surface of the fireproofing board 10,
As the molten slag a cools and solidifies on the surface of the fireproof board 10,
Due to the difference in coefficient of thermal expansion with the fireproof plate 10, a separation crack is formed between the two. Therefore, the layered slag mass b
When it reaches the waste end side B of the chains 1, 1, it breaks off from the adjacent end of the cooling tray 5 due to its own weight and falls, and is stored in the waste bucket 18.

In addition, the empty cooling tray 5 from which the slag mass b has been disposed of is moved below the slag outlet 51 by the chains 1, 1, and during this movement, the residual heat is released and cooled, and by repeating this process, the slag is continuously removed. A can be made into a small slag mass b.

In the slag conveyor having the above configuration, the cooling tray 5 wears out and deteriorates during use.
are mounting edges 11 integrally protruding from both sides of the board 7,
Small hole 12 drilled in 11 and continuous plate 13 of chain 1
The cotter pins 15, 1 are attached via a simple mounting means 6 which connects and fixes the small holes 14 drilled in the cotter pins 15 through the cotter pins 15.
5, it can be easily attached and detached, and maintenance is extremely easy.

Next, FIG. 5 shows another embodiment of the cooling plate 5, in which cooling fins 20 for heat radiation are protruded from the bottom surface. That is, the cooling plate 5 is a substrate made of a thin metal material with protruding edges 8, 8 on both sides and a large number of small locking protrusions 9, 9... on the plate surface. A refractory plate 10 with a smooth surface made of graphite-based refractory material is placed on the plate surface of 7, and when sintered, it is combined with the above-mentioned locking small protrusions 9, 9... to the inside of the raised edges 8, 8. In addition to being fixed and integrated, a plurality of cooling fins 20, 20... are integrally formed to protrude from the bottom surface of the substrate 7, thereby increasing the efficiency of the heat dissipation cooling effect in a water-cooled or air-cooled cooling mechanism (not shown). The aim is to

[Effects of the invention] As stated above, the slag conveyor of the invention has the following effects:
By constructing the cooling tray with a smooth fireproof plate made of graphite-based fireproofing material on its surface,
It has the characteristics of no slag adhesion and excellent cooling efficiency. In addition, since the cooling tray can be easily replaced through a simple mounting means, it is easy to replace deteriorated parts and has excellent workability, and the practical effects after implementation of this invention. is extremely large.

[Brief explanation of the drawing]

Fig. 1 is an overall front view showing one embodiment of the slag conveyor of the present invention, and Fig. 2 is a -
3 is an enlarged front sectional view of the main part of the slag conveyor, FIG. 4 is a sectional view taken along the - line in FIG. 3, and FIG. 5 is a partially cutaway back side showing another embodiment of the cooling tray. FIG. 1...Chain, 3...Sprocket, 4...
Drive sprocket, 5... Cooling plate, 6... Simple mounting means, 7... Board, 9... Small locking projection, 10...
... Fireproof board, 11 ... Mounting edge, 13 ... Continuous board, 15
... split pin, 16 ... drive motor, 20 ... cooling fin, 50 ... melting furnace, 51 ... slag outlet, a...
...slag, b... slag lump.

Claims (1)

[Scope of utility model registration request] A large number of cooling trays are arranged adjacent to each other on an endless starter constructed to be rotated by a drive mechanism, and the cooling trays collect the slag flowing out from the slag outlet of a blast furnace or the like or the slag gutter that communicates with the slag outlet. In the slab conveyor that receives and conveys the slabs by means of has a structure in which a fireproof plate with a smooth surface made of a graphite-based fireproofing material is placed on the surface of the cooling plate, and each of the cooling plates is fixedly attached to and detached from the endless track via a simple attachment means. A slag conveyor featuring