CN221208312U - Semi-autogenous mill feed system - Google Patents

Abstract

The utility model relates to a feeding system of a semi-autogenous mill, which comprises a semi-autogenous mill and a feeding device, wherein a water return ring and a feeding bushing are sequentially arranged at a feeding port of a cylinder body of the semi-autogenous mill from outside to inside, a discharging arm is arranged at the feeding device, a circle of wear-resistant lining plate is arranged on the inner circumferential surface of the feeding bushing, the wear-resistant lining plate is fixedly connected to the water return ring through bolts, and the tail end of the discharging arm of the feeding device extends to the upper part of the wear-resistant lining plate. According to the utility model, the wear-resistant lining plate is arranged on the circumferential surface of the feeding bush, and the discharging arm of the feeding device is improved, so that the discharging arm extends to the wear-resistant lining plate, the material is ensured to directly fall into the barrel of the grinder or fall on the wear-resistant lining plate, and is not contacted with the feeding bush, zero abrasion of the material to the feeding bush is realized, and the service life of the feeding bush can be effectively prolonged.

Description

Semi-autogenous mill feed system

Technical Field

The utility model relates to the technical field of semi-autogenous mill improvement, in particular to a feeding system of a semi-autogenous mill.

Background

In the mineral separation process, the semi-autogenous mill is used for continuously grinding ore after a crusher, and has the functions of crushing and grinding, so that the granularity of ore blocks fed by the semi-autogenous mill is generally larger than that of a ball mill, and the semi-autogenous mill is more greatly impacted and worn due to the increase of the feeding amount and the increase of the granularity of materials along with the development of the increasingly large specification of the semi-autogenous mill.

At present, the northern heavy industry MZS used by company factories selects 5.5×6.6m semi-autogenous mill, and the following problems exist in the use process:

The feeding lining is easy to wear

When feed arrangement is to half autogenous mill feed, ore falls at first on half autogenous mill feed bush, and rotatory feed bush drives ore and rotates on the bush, leads to the easy wearing and tearing of feed bush, shortens its life, and the feed bush dismantles the installation loaded down with trivial details during the maintenance, and change time needs more than 2 days, wastes time and energy, seriously influences work efficiency.

In this regard, companies plan replacement for mill outages or large service, but in actual use the replacement cycle of the feed bushing is 10-12 months and the mill liner replacement cycle is 16-20 months, which results in an inability to synchronize the feed bushing with the mill liner service, resulting in increased downtime service. In order to ensure that the replacement period of the feeding bushing is synchronous with the overhaul period, a maintainer carries out temporary steel plate repair welding on the region with serious abrasion of the feeding bushing about 10-12 months in use to prolong the replacement period, but the temporary welding can deform the stress of the bushing, so that the micro deformation of the hollow shaft is influenced, and potential safety hazards are brought to the main body part of the semi-autogenous mill.

To solve this problem, a person skilled in the art proposes to protect a feed bushing of a semi-autogenous mill by improving a feed device, such as a feed device of a semi-autogenous mill disclosed in CN205217062U chinese utility model patent, comprising a feed hopper, a box liner, a blanking buffer slot, a chute liner, a car body, a driving device, a weight box, a mechanical lifting device, a track, a chute, a hollow shaft and a feed bushing, wherein the feed hopper is provided with a welded box body with a blanking buffer slot structure, the front end part of the box body is a chute, the box liner fixed by bolts is paved in the box body, the front end of the feed hopper extends into the hollow shaft of the mill, the chute inside the feed bushing is provided with a chute liner fixed by bolts, the feed hopper is fixed on the car body, the car body is provided with a driving device, a weight box and a mechanical lifting device, and the feed device is placed on a track fixed on a cement foundation. The feeding device can be quickly and accurately moved in and out of the feeding end, labor is saved, working efficiency is improved, wear resistance of the feeding device is improved, service lives of the feeding device and the feeding bushing are prolonged, stability of the trolley in working is improved, and the feeding device is applied to the technical field of mining equipment.

2. Lining board overhauling mechanical arm implementation limitation

Because the caliber of the feed inlet of the feed bushing is smaller, the size of the main frame of the mechanical arm is limited in the process of using the mechanical arm to assist in replacing the lining plate of the mill cylinder, and the mechanical strength of the mechanical arm which can be used is insufficient, the running space is narrow, and the like, so that the overhaul efficiency is greatly reduced.

In view of the above, the present application will begin with an improved semi-autogenous mill feed bushing system.

Disclosure of utility model

The utility model provides a semi-autogenous mill feeding system.

The specific technical scheme of the utility model is as follows: the utility model provides a semi-autogenous mill feed system, includes semi-autogenous mill and feed arrangement, semi-autogenous mill barrel feed inlet has set gradually from outside to inside and has returned water ring and feeding bush, feed arrangement is provided with the row material arm, be provided with the wear-resisting welt of round on feeding bush's the inner circumference, wear-resisting welt passes through bolted connection and fixes on returning water ring, feed arrangement's row material arm's end extends to wear-resisting welt top.

Further, it is preferable that the abrasion-resistant lining plate is composed of 8 arc plates of 45 °.

Further, preferably, the longitudinal section of each circular arc plate of the wear-resistant lining plate is right trapezoid, the right-angle side is close to the water return ring, and the inclined side is close to the inside of the semi-autogenous mill cylinder.

Further, it is preferred that the feed bushing mouth size is increased to branst 2000mm.

Further, it is preferable that the inner diameter size of the water return ring is 1400mm.

Further, it is preferable that the section of the discharge arm extending into the feed inlet is provided with a round of peripheral edge.

Further, preferably, the surrounding edge is formed by an upper surrounding edge and a lower surrounding edge, and the whole surrounding edge is circular.

The beneficial effects of the utility model are as follows:

(1) According to the utility model, the wear-resistant lining plate is arranged on the circumferential surface of the feeding bush, and the discharging arm of the feeding device is improved, so that the discharging arm extends to the wear-resistant lining plate, the material is ensured to directly fall into the barrel of the grinder or fall on the wear-resistant lining plate, and is not contacted with the feeding bush, zero abrasion of the material to the feeding bush is realized, and the service life of the feeding bush can be effectively prolonged. And the used wear-resistant lining plates are designed in a blocking manner, so that the maintenance and the replacement are more flexible and quick, and the maintenance cost can be reduced.

(2) According to the utility model, the size of the feeding lining material opening and related parts is increased, so that the problem that the implementation of the mechanical arm for overhauling the lining board in the semi-autogenous mill cylinder body is limited is solved, the operation space of the mechanical arm is enlarged, and the maintenance efficiency of the lining board is improved.

(3) According to the utility model, through improving the size of the water return ring and arranging the surrounding edge at the section of the discharge arm extending into the feed inlet, the phenomenon that the semi-autogenous mill is subjected to material pouring and overflowing due to the increase of the size of the feed bushing inlet can be avoided, the smooth production operation is ensured, the contact between the material and the feed bushing can be isolated, and the abrasion of the feed bushing is further avoided.

Drawings

FIG. 1 is a schematic diagram of a semi-autogenous mill feed system of the present utility model;

FIG. 2 is a front view of a feed bushing;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

FIG. 4 is a schematic structural view of a wear resistant backing plate;

FIG. 5 is a schematic view of the structure of the feeding device;

FIG. 6 is a sectional view B-B of FIG. 5;

Fig. 7 is a front view of the peripheral edge of the discharge arm.

In the figure: 1-semi-autogenous mill, 2-feed arrangement, 3-feed inlet, 4-return water ring, 5-feeding bush, 6-discharge arm, 7-wear-resisting welt, 8-surrounding edge.

Detailed Description

In order to make the technical problems and technical schemes solved by the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1 to 4, a feeding system of a semi-autogenous mill comprises a semi-autogenous mill 1 and a feeding device 2, wherein a water return ring 4 and a feeding bushing 5 are sequentially arranged at a feeding port 3 of a barrel of the semi-autogenous mill from outside to inside, a discharging arm 6 is arranged at the feeding device 2, a circle of wear-resistant lining plates 7 are arranged on the inner circumferential surface of the feeding bushing 5, the wear-resistant lining plates 7 are fixed on the water return ring 4 through bolt connection, and the tail end of the discharging arm 6 of the feeding device 2 extends to the upper part of the wear-resistant lining plates 7. In practical implementation, the discharge arm 6 of the feeding device is improved by 400mm, the inclination angle is adjusted to 27 degrees from original 32 degrees, the arm length is prolonged by 780mm, so that the tail end of the discharge arm can be ensured to be prolonged to the upper part of the wear-resistant lining plate 7, when ore materials are fed into the semi-automatic mill 1, the materials directly fall into the cylinder of the mill or fall onto the wear-resistant lining plate 7 and are not contacted with the feeding lining, and the abrasion to the feeding lining is avoided, and the service life of the feeding lining is prolonged.

Further, preferably, the wear-resistant lining plate 7 is designed into a plurality of movable parts, such as 8 arc plates of 45 degrees are spliced, and then the movable parts are connected to the water return ring 4 through bolts, so that the movable parts are convenient and quick to detach and replace, and the movable parts can be replaced pertinently according to the wear degree of each movable part, the use value of the movable parts is guaranteed to be maximized, and the purchase cost of spare parts is saved.

Further, it is preferable that the longitudinal section of each circular arc plate of the wear-resistant lining plate 7 is right trapezoid, and the right-angle edge is close to the water return ring 4, so that the connection between the circular arc plates and the water return ring is more stable, and the bevel edge is close to the inside of the semi-autogenous mill cylinder, so that when ore falls on the wear-resistant lining plate 7, the bevel edge is more beneficial to the ore to slide down into the cylinder, and the abrasion and impact of the ore on the wear-resistant lining plate 7 are reduced.

In order to solve the problem that the implementation of the mechanical arm for overhauling the lining plate in the barrel of the semi-automatic grinding machine is limited, the application enlarges the working space of the mechanical arm by enlarging the size of a feeding hole and related parts, and improves the maintenance efficiency of the lining plate. The size of the feed bushing 5 feed opening is increased from original 1200mm to branchy 2000mm, and the sizes of the feed bushing and the return water ring are adaptively improved.

In order to ensure that the semi-autogenous mill cannot fall out of materials due to the increase of the size of the feed opening of the feed bushing 5, on one hand, the inner diameter size of the water return ring 4 is increased to be 1400mm, so that ore pulp falling out of the semi-autogenous mill cylinder body can be conveniently returned to a discharge arm of the feed device; on the other hand, as shown in fig. 5 to 7, a circle of surrounding edge 8 is arranged at the section of the discharge arm 6 extending into the feed inlet 3, and the surrounding edge 8 is formed by two semicircles of an upper semi-surrounding edge and a lower semi-surrounding edge, and is round after being welded into a whole. The surrounding edge 8 is welded on the discharging arm, a protection surrounding baffle can be formed between the discharging arm and the feeding bushing to prevent materials from overflowing, and the materials can be isolated from contacting with the feeding bushing to avoid abrasion of the feeding bushing.

While the utility model has been described in detail in connection with specific and preferred embodiments, it will be understood by those skilled in the art that the utility model is not limited to the foregoing embodiments, but is intended to cover modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (7)

1. The utility model provides a semi-autogenous mill feed system, includes semi-autogenous mill (1) and feed arrangement (2), semi-autogenous mill barrel feed inlet (3) have set gradually from outside to inside and have returned water ring (4) and feeding bush (5), feed arrangement (2) are provided with row's material arm (6), its characterized in that: the novel water return ring is characterized in that a circle of wear-resistant lining plate (7) is arranged on the inner circumferential surface of the feeding bushing (5), the wear-resistant lining plate (7) is fixedly connected to the water return ring (4) through bolts, and the tail end of the discharging arm (6) of the feeding device (2) extends to the upper portion of the wear-resistant lining plate (7).

2. A semi-autogenous mill feed system as defined in claim 1 wherein: the wear-resistant lining plate (7) consists of 8 arc plates with the angle of 45 degrees.

3. A semi-autogenous mill feed system as defined in claim 2 wherein: the longitudinal section of each circular arc plate of the wear-resistant lining plate (7) is in a right trapezoid shape, the right-angle side is close to the water return ring (4), and the inclined side is close to the inside of the barrel of the semi-autogenous mill (1).

4. A semi-autogenous mill feed system as defined in claim 1 wherein: the size of the feed opening of the feed bushing (5) is increased to be branchy 2000mm.

5. A semi-autogenous mill feed system as defined in claim 4 wherein: the inner diameter of the water return ring (4) is 1400mm.

6. A semi-autogenous mill feed system as defined in claim 5 wherein: the section of the discharging arm (6) extending into the feeding hole (3) is provided with a round of surrounding edge (8).

7. A semi-autogenous mill feed system as defined in claim 6 wherein: the surrounding edge (8) is composed of an upper surrounding edge and a lower surrounding edge, and the whole surrounding edge is round.