JPS5938816B2 - Rotary drying setsubun machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotary sieving machine incorporating a drying and stripping mechanism.

Slags such as converter slag, blast furnace slag, and cupola slag contain valuable materials such as granulated iron, so it is desirable to collect them.

However, since the iron granules taken out from the converter slag and the like have residual powder containing moisture attached to them, this powder must be removed.

Conventionally, converter slag and the like were dried using a rotary dryer, etc., and then placed in a ball mill and ground to remove surface deposits.

This was then led to a sieve to separate granulated iron and powder. Such a granular iron recovery device requires three independent steps, a large amount of power, communication means such as a belt conveyor to connect each device, a large number of devices, and a large size.
The problem was that it required a large site and required a lot of manpower to operate and manage it. This invention solves these difficulties and relates to a device that can partially perform these three steps with one device.

That is, this invention sends hot air into a rotary sieving machine to forcibly dry the contents, and also incorporates an impacting body such as a chain or a ball with a chain to apply impact to the contents and dry powder etc. To provide a rotary drying and dividing machine which peels off, sieves and recovers the separated granules and powder. An explanation will be added below with reference to drawings showing embodiments.

FIG. 1 is a vertical sectional right side view of a rotary drying sieve machine according to an embodiment of the present invention, and FIGS. 2 and 3 are views of ■-■ in FIG.
, ■-■ sectional view. Reference numeral 1 denotes a cylindrical outer cylinder, in which an inner cylinder 2 is housed.

A sieving hole 22 having a diameter corresponding to the size of the agglomerates to be sieved is bored in the whole or part of the inner cylinder 2, and the inner cylinder 2 has the role of a rotating sieve screen. In this example, the inner cylinder 2 is firmly supported inside the outer cylinder 1 by the support plate 10, but instead of the support plate 10, a spring or the like may be used for elastic support.

The outer cylinder 1 is rotatably supported by receiving rollers 6 at its front, rear, left and right sides so as to form a constant inclination angle with the horizontal line.

The support plate 61 supports the receiving roller 6 . A gear 52 is provided around the outer periphery of the outer cylinder 1.

The pinion 53 attached to the motor 51 is connected to the gear 5.
It meshes with 2. When the motor 51 is rotated, the pinion 53
The rotational force is transmitted from the b1 to the gear 52, and the b1 outer casing 1 and the inner cylinder 2 are rotated greatly. Since the outer cylinder 1 and the inner cylinder 2 form a constant inclination angle with the horizontal line, the contents move toward the right in FIG. 1 while rotating D. The rotary drive device 5 may be configured by combining a sprocket and a chain in addition to the pinion and gear described above.

Now, the inside of the inner cylinder 2 can be divided into a lipta zone A, a peeling zone B, and another dry sieving zone C.

In the lipta zone A, a plurality of lipta 8 are attached to the inner cylinder wall surface.

As the inner cylinder 2 rotates, the residue is lifted up by the liptor 8 and eventually falls, so that the residue is vigorously agitated. In the peeling zone B, a large number of impact bodies 90 are bound by chains 91.

The impacting body 90 is lifted by the Lipta 9 and eventually falls,
Since it collides with the surface of the residue etc., the powder etc. is peeled off due to this impact. A supply hood 3 is provided to cover the front end of the outer cylinder 1.

A supply chute is inserted diagonally through the through hole 30 of the supply hood 3, and the tip of the supply chute 7 is open facing the starting end 20 of the inner cylinder 2. Reference numeral 4 denotes a discharge hood, which is provided at the rear of the outer cylinder 1.

A hot air supply port 40 is opened at the center of the end face of the exhaust hood 4. Further, at the lower end of the discharge hood 4, a lower sieve outlet chute 41 and an upper sieve outlet chute 42 are provided. The sieve outlet chute 41 is a powder passage G between the outer cylinder 1 and the inner cylinder 2.
communicate with. On the other hand, the sieve outlet chute 42 communicates with the inside of the inner cylinder 2, and the partition wall 49 of both the chute 41, 42 is provided close to the inner cylinder end 21. Outer cylinder 1 and inner cylinder 2
is rotated by a rotary drive device 5, while the supply hood 3 and the discharge hood 4 are fixed.

A suitable airtight mechanism is provided between these members to prevent leakage of hot air, powder, etc. 31 is the exhaust gas trunk pipe,
It is provided so as to go around the outer cylinder 1 and is fixed to the supply hood 3.

Reference numeral 32 denotes an exhaust gas outlet, which is bored at an appropriate location in the trunk pipe 31.

The hot air supplied from the hot air supply port 40 gradually advances inside the inner cylinder 2, dries the contents, and then is discharged through the exhaust gas body pipe 31 and the exhaust gas outlet 32.

The operation of the above configuration will be explained. When the converter residue and the like are dropped from the feeder, the residue falls to the starting end 20 of the inner cylinder 2.

Since the inner cylinder 2 is inclined at an appropriate angle with respect to the horizontal line and rotated in a constant direction, the residual components gradually advance while rolling. Since a sieving hole 22 is opened in the inner cylinder 2, small-diameter objects such as powder particles fall into the powder passage G through the sieving hole 22.

Powder containing water is attached to the granular material, but the inner cylinder 2
It dries easily because hot air is guided through it.

In particular, in Ripta zone A, the residue is lifted up by Ripta and dropped from a certain height, where it is vigorously agitated while being exposed to hot air, so that the powder coat layer dries quickly. The dried powder material can be easily peeled off and passed through the sieve hole 22.
1 falls into powder passage G. In the dry sieving zone C1,
Although most of the powder is removed, some powder remains, strongly adhering to the powdered iron lump.

However, when entering the peeling zone B, the impacting body 90 collides with the residue, and the powder lumps are subjected to a particularly severe impact force. Also, because of the hot air, the impactor is heated and comes into strong contact with the surface of the iron granules, instantly heating them. Contact drying with a hot solid is more effective than drying with hot air. In this way, even the minute powder adhering to the granulated iron can be peeled off.

Then, the granulated iron enters the dry sieve zone C2, where powder is removed, and then discharged and recovered from the sieve outlet chute 42. On the other hand, the powder material is discharged through the powder passage G from the D1 sieve outflow chute 41. In this way, valuable materials such as granulated iron without powder deposits can be recovered from converter slag and the like.

According to the present invention, a process that conventionally required three devices, such as a rotary dryer, a ball mill, and a rotary sieve, can be performed with only one device, making the entire device compact and connecting conveyors, etc. Equipment costs can be significantly reduced without requiring any additional means.

Furthermore, since the number of devices is reduced, there are many benefits such as extremely simplified management in terms of operation, maintenance, inspection, etc. This invention can be used not only for converter slag but also for blast furnace slag, electric furnace slag, cupola slag, etc.

As described above, the inner cylinder 2 may be fixed to the outer cylinder 1 by the support plate 10, or may be elastically supported using a spring or the like.

In this way, the vibration of the inner tube 2 is alleviated by the spring and is hardly transmitted to the outer tube 1, so that damage to the outer tube 1, failure of the drive device 5, the receiving roller 6, etc. can be prevented. The flow of the hot air is in the opposite direction to the flow of the residue, but it goes without saying that the flow may be in the opposite direction.

The shape of the inner cylinder may be a polygonal cylinder such as a hexagonal cylinder or an octagonal cylinder other than a cylinder.

In addition, if hot air is strongly blown onto the inner cylinder 2 to heat the inner cylinder 2, even if wet powder particles adhere to the sieving holes 22, they will easily fall off, so there is an advantage that no clogging D occurs. be.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional right side view of a rotary drying sieve machine according to an embodiment of the present invention, and FIGS. 2 and 3 are - and - sectional views in FIG. 1. 1 is an outer cylinder, 2 is an inner cylinder, 3 is a supply hood, 4 is a discharge hood, 5 is a rotary drive device, 6 is a receiving roller, 7 is a supply chute, 8 is a lipter, 9 is a lipter, 22 is a sieving hole, 40 is a hot air supply port, 41 is a lower sieve outlet chute, 42 is an upper sieve outlet chute, 90 is an impact body, 91 is a chain, A is a lipta zone, and B is a peeling zone.

Claims (1)

[Claims] 1. An inner cylinder 2 with sieving holes 22 bored in the peripheral wall and a cylindrical outer cylinder 1 supporting the inner cylinder 2 are rotatably supported at a constant angle from the horizontal line, and Outer cylinder 1
A means for passing hot air is provided inside the outer cylinder 1 and the inner cylinder 2, and a plurality of lifters 8 are attached to a part of the inner wall of the inner cylinder, and a plurality of lifters 8 are attached to the other part of the inner wall of the inner cylinder. Impact body 90
A rotary drying sieving machine characterized by being bound by a chain 91.