JPH038365Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a rod mill that crushes any raw stone with a predetermined number of rods housed in the shell body.
In particular, the shell main body is formed into a conical truncated cylinder, and the supply port and the discharge port are formed into a conical truncated cylinder whose diameter increases toward the inside, and a pair of outer ring bodies of the same diameter are provided around the outer circumference of this. The cylindrical body rotates stably, which stabilizes the rolling and falling of the rod and improves the filling rate.Furthermore, it prevents one end of the rod from getting caught in the supply or discharge port during rolling and falling. The present invention relates to a rod mill that prevents reduction in grinding capacity.

Conventionally, this type of rod mill houses a predetermined number of rods in a cylindrical shell body, supplies raw stone and water to the shell body which is rotated by an arbitrary drive device, and crushes the raw stone with the rolling and falling rods. The mechanism is such that it is discharged along with water from the discharge port.

However, since its crushing ability is greatly affected by the residence time of the raw ore inside the shell, the inventor first formed the shell body into a trapezoidal shape with a large diameter on the supply port side, and set the center of the shell horizontally. He devised a rod mill that is characterized by rotating stably and has already filed an application in Utility Application No. 57-21022 (Utility Model No. 1-23552), but he has continued to continue his research. As a result, we discovered factors other than those mentioned above that affect grinding ability. This is because the shell body rolls and falls relatively stably compared to the conventional cylindrical shell body, which improves the filling rate of the rods, so that a predetermined number of rods housed in the shell body As the rod repeatedly rolls and falls as it rotates, in rare cases the rod that is near the center of the shell body moves horizontally, and while falling, something gets caught in the supply or discharge port, reducing the impact of the fall. It was discovered that if it did not fall easily, it would become an obstacle to the rods falling one after another, and the crushing ability would be reduced even if the shell body was made into a conical trapezoidal body.

The present invention was made in consideration of the above facts, and the shell body is made into a trapezoidal shape, and the supply port and the discharge port are each made into a trapezoidal cylinder with a diameter larger toward the interior side of the shell body, and with the same diameter. A pair of outer ring bodies are provided around the rod, and these are driven via a drive part, so that they can be rotated stably, and the rod can be leveled.Furthermore, the filling rate of the rod can be improved. To reduce the chance of a rod getting caught inside a supply port and a discharge port during rolling and falling, and to make it fall in the shortest possible time even if it gets caught.

That is, the present invention forms a shell main body in the form of a conical trapezoidal cylinder, having a supply port-side side wall having a supply port and a discharge port-side side wall having a discharge port and having a smaller diameter than the supply port-side side wall. , the diameter of the discharge port is larger than the diameter of the supply port, and the supply port and the discharge port are formed of a conical trapezoidal cylinder whose diameter is larger toward the inner side of the shell main body, and the shell main body, the side wall, and the supply port A liner is attached to the inner circumferential surface of the mouth and discharge port, and
The gist is that a pair of outer rings of the same diameter are provided around the outer periphery of the shell main body and are rotatable via a drive section.

In order to further clarify the gist of the invention described above, one embodiment of the invention will be described below with reference to the drawings.

As shown in Fig. 1, the rod mill according to the present invention includes a hopper A for supplying raw ore, and a stone feeding device B connected to the hopper A via a chute _A1 for supplying the raw ore in fixed quantities. , the stone feeding device B
A shell C that crushes the rough stone supplied by the shell C, a drive part D that supports the shell C on a predetermined installation surface and enables rotational driving, It consists of a sorting device E that separates the cells.

Next, as shown in FIG. 2, the shell C connects the side wall 11 with the supply port 111 and the side wall 13 with the discharge port 131 so that the supply port 111 side is larger in diameter than the discharge port 131 side. It is fixedly attached to a cylindrical body 12 formed in the shape of a truncated cone, and a liner 14 is attached to the inner peripheral surface thereof. Further, each of the supply port 111 and the discharge port 131 is a truncated conical cylinder whose diameter increases toward the interior of the shell main body 1, and this truncated conical cylinder and the side wall 1
Liners are attached to the inner circumferential surfaces of 1 and 13.

Further, outer ring bodies 2a and 2b having the same diameter are attached to the outer periphery of the shell body 1 so as to be driven by the drive section D.

The supply port 111 and the discharge port 131 are arranged opposite to each other on the rotation center axis of the shell body 1, and the inner diameter of the discharge port 131 is larger than the inner diameter of the supply port 111, so that the rod 3 can be accommodated and replaced. It is formed so that water and raw stones in the shell main body 1 are difficult to flow backward, and furthermore, they are not caught in the upper surface of the supplied raw stones.

Next, the operation of the present invention configured as above will be explained. First, from hopper A to shoot A ₁ ,
The rough stone that has passed through the stone supply device B and reached the supply port 111 is
A predetermined number of rods 3 are stored in the shell body 1, which is designed to be stably rotated by a drive unit D via outer rings 2a and 2b provided on the outer periphery of the shell body 1. Supplied with. Due to the rod 3 that repeatedly rolls and falls as the shell body 1 rotates, the supplied raw stone has more on the supply port side and less on the discharge port side, and the inner circumferential wall of the shell body 1 has a so-called right triangular cross section. Since the shell is shaped like a rotating body, the rods are kept relatively horizontal and the filling rate of the rods is about 50%. During this process, the rods 3 that are close to the center of the shell body move in the horizontal direction. At the same time, the supply port 111 and the discharge port 131 may be blown diagonally due to an impact or the like and may be damaged during the fall.
The rod may get caught in the rod 3', causing the rod to get caught unexpectedly. At this time, if the supply port 111 and the discharge port 131 have a cylindrical shape with the same diameter in the front and back as in the conventional case, the rod 3' will get caught in the supply port 111 and the discharge port 131 at its tip and will not fall smoothly. Once it gets caught, it may not come off easily, or even if it does, it will be an inefficient impact. However, according to the present invention, the supply port 1 has a trapezoidal shape with the diameter increased toward the inside of the shell body 1 and a liner attached.
11 and the discharge port 131, even if the rod 3' gets caught, its end will come into contact with the liner on the inner wall of the supply port 111 and the discharge port 131, and the rod 3' will be blown off by the impact and will not stay and immediately return to the shell body. Fall into 1.

As explained above, in the present invention, by forming the shell main body into a trapezoidal conical body with a larger diameter on the side with the supply port than on the side with the discharge port, it is possible to make it easier for raw stones to accumulate on the supply port side. Moreover, due to the rolling of the rods, the discharge port side is crushed into sand, so the raw stones in the lower part of the shell body are stored in a so-called right triangle shape, with more on the supply port side and less on the discharge port side. , the group of rods tends to be horizontal and rolls relatively stably, making it possible to improve the filling rate of the rods.

In addition, by making the diameter of the discharge port larger than the diameter of the supply port, the rod mill is originally designed to turn raw stone into sand, but if the sand-like material remains in the main body, it becomes mud-like. Therefore, when the particle size reaches an appropriate size, it is discharged from the discharge port one by one, but even if relatively coarse particles try to flow out, they are returned to the shell body through the slope of the discharge port and are further crushed. , the crushed stone particle size becomes almost uniform and the yield is improved.

Furthermore, by attaching the liner to the shell body, the supply port, the discharge port, and the inner periphery of the side wall, by making the shell body a table-shaped cylinder, the rod group can be made relatively horizontal, and the filling rate can be improved. Although the crushing ability has been improved, during the operation of the rod, objects close to the center of the shell body tend to move horizontally, and are also blown diagonally due to impact, get caught in the supply port or discharge port, and are left undisturbed. Sand is no longer stuck in this state, resulting in more efficient sand crushing.

As described above, the present invention has unique effects and can be said to be a very useful invention.

[Brief explanation of drawings]

The drawings show an embodiment of the rod mill according to the present invention, and FIG. 1 is a partially cutaway side view, and FIG. 2 is a longitudinal sectional view of the shell body. 1... Ciel body, 3... Rod, 11, 13
... Side wall, 12 ... Cylindrical body, 111 ... Supply port, 1
31...Exhaust port.

Claims (1)

[Scope of utility model registration request] A shell main body is formed into a conical trapezoidal cylinder by having a supply port side wall having a supply port and a discharge port side wall having a discharge port and having a diameter smaller than that of the supply port side wall. The diameter of the supply port is larger than that of the supply port, and the supply port and the discharge port are formed of a conical truncated cylinder whose diameter is larger toward the inner side of the shell main body, and the shell main body, the side wall, and the supply port and the discharge port are A rod mill characterized in that a liner is attached to the inner circumferential surface of the shell body, and a pair of outer wheels of the same diameter are provided around the outer periphery of the shell main body and are rotatable via a drive section.