阅读说明：本技术 一种溢流型球磨机排矿装置 (Ore discharging device of overflow type ball mill ) 是由 吴彩斌 徐涛 徐今冬 龚清原 廖宁宁 宁丰 于 2021-07-29 设计创作，主要内容包括：本发明涉及磨矿设备溢流型球磨机的组件领域,具备为一种溢流型球磨机排矿装置。目的是提供一种可提升溢流型球磨机磨矿介质的装载、防止球磨机内部磨矿介质通过圆筒筛排出、便于矿浆通过的一种溢流型球磨机排矿装置。本发明一种溢流型球磨机排矿装置,包括圆筒筛,所述圆筒筛内设有固定连接的反向螺旋叶片；包括至少两个扇形挡板,至少两个所述扇形挡板与所述的反向螺旋叶片可拆卸连接,且至少两个所述扇形挡板顺序连接,并形成与反向螺旋叶片处于同心的螺旋结构。本发明通过在圆筒筛内部设置的反向螺旋叶片,以及安装于反向螺旋叶片的扇形挡板,使得阻挡了球磨机内部磨矿介质的排出；提高溢流型球磨机磨矿介质的充填率。(The invention relates to the field of components of an overflow ball mill of ore grinding equipment, and provides an ore discharging device of the overflow ball mill. The overflow type ball mill ore discharging device can promote loading of ore grinding media of the overflow type ball mill, prevent the ore grinding media in the ball mill from being discharged through a cylindrical screen, and facilitate passing of ore pulp. The invention relates to an ore discharge device of an overflow ball mill, which comprises a cylindrical screen, wherein reverse helical blades which are fixedly connected are arranged in the cylindrical screen; including two at least sector baffles, at least two sector baffles with reverse helical blade can dismantle the connection, and at least two sector baffles connects in proper order to form and be in concentric helical structure with reverse helical blade. The reverse helical blade arranged inside the cylindrical screen and the fan-shaped baffle arranged on the reverse helical blade prevent the discharge of ore grinding media inside the ball mill; the filling rate of the grinding medium of the overflow ball mill is improved.)

1. The ore discharging device of the overflow ball mill is characterized by comprising a cylindrical screen, wherein reverse helical blades which are fixedly connected are arranged in the cylindrical screen; including two at least sector baffles, at least two sector baffles with reverse helical blade can dismantle the connection, and at least two sector baffles connects in proper order to form and be in concentric helical structure with reverse helical blade.

2. A flow-type ball mill ore discharging device according to claim 1, characterized in that the reverse spiral blade in the cylindrical screen is provided with at least one connecting strip, and at least two of the sector-shaped baffles are detachably connected with the reverse spiral blade through at least one connecting strip.

3. An overflow ball mill ore discharging device according to claim 2, wherein at least one of the connecting strips and at least two of the sector baffles are provided with first bolt holes in the same axis.

4. A flow-type ball mill ore discharging device according to any one of claims 1 to 3, wherein at least two of the sector-shaped baffles are respectively provided with at least one strip-shaped hole.

5. An overflow ball mill ore discharging device according to claim 1, wherein the cylindrical screen and the fan-shaped baffle are provided with at least two second bolt holes on the same axis, and the end parts of the second bolt holes are provided with counter bores; the bolt comprises at least two bolts, and the at least two bolts are respectively installed in the at least two second bolt holes.

6. An overflow type ball mill ore discharging device according to claim 5, wherein the bolt is sequentially provided with a nut protection sleeve and a locking nut in a matched manner, and a nut rubber plug for protecting the locking nut is arranged in the nut protection sleeve in an interference fit manner.

7. An overflow ball mill ore discharge device according to claim 6, wherein a protection pad is further provided at the nut protection sleeve.

8. An overflow ball mill ore discharge apparatus according to claim 5, wherein the surface of the counter bore is provided with a detachably connected sealing plug.

Technical Field

The invention relates to the field of components of an overflow ball mill of ore grinding equipment, and provides an ore discharging device of the overflow ball mill.

Background

A ball mill is a mechanical device that continues to pulverize ore or other material, following a crusher, in order to obtain a finer particle product as required by the process. The method has the advantages of high crushing ratio, good reliability, strong adaptability, large processing capacity and the like; it is widely used in mineral dressing, metallurgy, building and chemical industries, and is the main equipment for grinding operation.

The grinding operation is the last operation for preparing mineral aggregate before the mineral aggregate is selected. The method has the advantages that the energy consumption and the material consumption are high, the product quality directly influences the index of the subsequent sorting operation, the ore grinding processing capacity actually determines the processing capacity of a concentrating mill, the production efficiency of the ball mill directly influences the production efficiency of the whole mine, and whether the mine can complete the production target is also determined, so that the ball mill and the ore grinding operation are the life lines of the concentrating mill.

The overflow ball mill mainly comprises a cylinder body, an end cover, a main bearing, a hollow shaft neck, a transmission gear, an ore feeder and the like. Ball mills are classified into lattice type ball mills and overflow type ball mills according to the discharge manner, and are the most common ore mills used in ore dressing plants.

The overflow ball mill is mainly used for wet grinding of various ores, in the ore grinding process, quantitative water is continuously fed into the mill while continuously feeding the materials to the mill, so that the ground fine materials and the water form mixed fluid, and ore pulp is discharged from the mill in a self-flowing mode, thereby completing ore grinding operation.

The basic factors influencing the fineness of grinding ore are the concentration of grinding ore, the filling rate of grinding medium, the rotating speed of the grinding mill and the like. The change of the filling rate of the grinding medium is a great test for the improvement of an ore pulp inlet and an ore pulp outlet of an overflow ball mill, generally speaking, the highest filling rate of steel balls of a common overflow ball mill is less than 40%, but an ore discharge device which can improve the filling rate of the overflow ball mill under the condition of the permission of a mill structure and can not overflow the grinding medium along with the ore pulp is urgently needed when the overflow ball mill is used more efficiently.

Disclosure of Invention

The invention aims to provide an ore discharge device of an overflow ball mill, which can promote the loading of ore grinding media of the overflow ball mill, prevent the ore grinding media in the ball mill from being discharged through a cylindrical screen and facilitate the passing of ore pulp.

In order to solve the technical problem, the ore discharging device of the overflow ball mill comprises a cylindrical screen, wherein reverse helical blades which are fixedly connected are arranged in the cylindrical screen; including two at least sector baffles, at least two sector baffles with reverse helical blade can dismantle the connection, and at least two sector baffles connects in proper order to form and be in concentric helical structure with reverse helical blade.

As a preferred embodiment of the ore discharging device of the overflow type ball mill, the reverse helical blade in the cylindrical screen is provided with at least one connecting strip, and at least two of the fan-shaped baffles are detachably connected with the reverse helical blade through at least one connecting strip.

As a preferred embodiment of the ore discharging device of the overflow ball mill, at least one connecting strip and at least two fan-shaped baffles are provided with first bolt holes which are positioned on the same axis.

As a preferred embodiment of the ore discharging device of the overflow type ball mill of the present invention, at least two of the sector-shaped baffles are respectively provided with at least one strip-shaped hole.

As a preferred embodiment of the ore discharging device of the overflow ball mill, the cylindrical screen and the fan-shaped baffle are provided with at least two second bolt holes on the same axis, and the end parts of the second bolt holes are provided with counter bores; the bolt comprises at least two bolts, and the at least two bolts are respectively installed in the at least two second bolt holes.

As a preferred embodiment of the ore discharging device of the overflow ball mill, the bolt is sequentially provided with the nut protective sleeve and the locking nut in a matched manner, and the nut rubber plug for protecting the locking nut is arranged in the nut protective sleeve in an interference fit manner

As a preferred embodiment of the ore discharging device of the overflow ball mill, a protective pad is further arranged at the nut protective sleeve.

As a preferred embodiment of the ore discharging device of the overflow ball mill, the surface of the counter bore is provided with a sealing plug which is detachably connected.

Advantageous effects

The invention has the following innovative advantages:

according to the overflow type ball mill, the reverse spiral blade is arranged inside the cylindrical screen, and the fan-shaped baffle plate is arranged on the reverse spiral blade, so that the discharge of ore grinding media inside the ball mill is prevented, and the loading limit position of the ore grinding media of the overflow type ball mill is lifted; the filling rate of the grinding medium of the overflow ball mill is improved, and the problems that the filling rate of the grinding medium of the overflow ball mill is low in the production process and the grinding medium is discharged from a discharge port of the overflow ball mill are solved;

the strip-shaped holes are formed in the fan-shaped baffle, so that the passing rate of the ore pulp is fundamentally optimized, common grid sieve holes are changed into strip-shaped annular holes, the passing rate of the ore pulp is greatly improved, and the resistance caused by the passing of the ore pulp is reduced;

on the other hand, the reverse spiral blade on the cylindrical screen can be used for reversely conveying the grinding medium entering the cylindrical screen along with the overflow of the ore pulp back to the inside of the cylinder body of the ball mill, so that the passing rate of the ore pulp is improved, and the pressure of the ore pulp caused by the passing of the ore pulp is reduced.

Drawings

FIG. 1 is a side schematic view of the present invention;

FIG. 2 is a partial perspective view of a cylindrical screen which is a component of the present invention;

FIG. 3 is a schematic partial cross-sectional view of the present invention;

in the figure: 1. the novel screen comprises a reverse spiral blade, 2. a cylindrical screen, 3. a fan-shaped baffle, 4. a connecting strip, 5. a strip-shaped hole, 6. a first bolt hole, 7. a second bolt hole, 8. a locking nut, 9. a counter bore, 10. a bolt, 11. a protective pad, 12. a nut protective sleeve, 13. a nut rubber plug and 14. a sealing plug.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more clear, the embodiments of the present disclosure will be described in detail and fully with reference to the accompanying drawings.

Like reference symbols in the various drawings indicate like elements. It should be noted that the described embodiments are only some of the embodiments of the present disclosure, and not all of the embodiments.

All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.

As shown in fig. 1 to 3, the ore discharging device of the overflow ball mill of the present invention comprises a cylindrical screen 2, wherein a helical blade fixedly connected with the cylindrical screen 2 is arranged in the cylindrical screen 2, and the helical blade is preferably a reverse helical blade 1; the sieve also comprises at least two fan-shaped baffles 3, wherein the at least two fan-shaped baffles 3 are detachably connected with the reverse helical blade 1, at least two fan-shaped baffles are sequentially connected, and form a helical structure concentric with the reverse helical blade 1, namely the fan-shaped baffles 3 are arranged on the reverse helical blade 1 in the cylindrical sieve 2 and are in the same helical structure; the sector baffle 3 prevents the grinding medium inside the cylindrical screen 2 of the ball mill from overflowing into the cylindrical screen 4 along with the ore pulp, and the grinding medium blocked by the sector baffle 6 is conveyed to the inside of the cylindrical screen 2 through the reverse helical blade 1 arranged on the inner wall of the cylindrical screen 4 in the continuous rotation along with the ball mill cylinder, so that the effect of improving the filling rate of the grinding medium of the ball mill is achieved.

As shown in the figure, reverse helical blade 1 in drum sieve 2 is equipped with at least one connecting strip 4, at least two fan-shaped baffle 3 is through at least one connecting strip 4 with reverse helical blade 1 can dismantle the connection, through the use that increases connecting strip 4, makes fan-shaped baffle 3 more firm. And at least one connecting strip 4 and at least two fan-shaped baffle plates 3 are provided with first bolt holes 6 which are positioned at the same axis, and the connecting strip 4 and the reverse helical blades 1 are detachably connected by installing bolts, bolts or other types of fasteners in the first bolt holes 6.

As shown in the figure, at least two of the sector baffles 3 are respectively provided with at least one strip-shaped hole 5, so that ore pulp can overflow from the cylinder of the ball mill to the cylindrical screen (4) during work and production through the strip-shaped holes 5, and the screening of the ore pulp is completed in the cylindrical screen (4); the grinding medium blocked by the fan-shaped baffle 3 can be conveyed back into the cylindrical screen 2 through the reverse spiral blades (1) in the cylindrical screen (4), while the ore pulp flows out from the strip-shaped holes 5, and the shape and structure of the strip-shaped holes 5 are more beneficial to enabling the ore pulp to flow outwards while rotating.

As shown in the figure, the cylindrical screen 2 and the fan-shaped baffle 3 are provided with at least two second bolt holes 7 which are positioned on the same axis, and the end parts of the second bolt holes 7 are provided with counter bores 9; the fan-shaped baffle plate is characterized by further comprising at least two bolts 10, wherein the at least two bolts 10 are respectively arranged on at least two second bolt holes 7, and the fan-shaped baffle plate 3 is firmly connected with the reverse helical blade 1 through the embodiment.

As shown in the figure, the bolt 10 is sequentially provided with a nut protective sleeve 12 and a locking nut 8 in a matching manner, and a nut rubber plug 13 for protecting the locking nut 8 is arranged in the nut protective sleeve 12 in an interference fit manner; a protective pad 11 is further arranged at the nut protective sleeve 12; a sealing plug 14 which is detachably connected is arranged on the surface of the counter bore 9, the sealing plug 14 is arranged on the surface of the counter bore 9 and is preferably in interference fit with the counter bore 9, and the sealing plug 14 is arranged to protect a screw 10 which is arranged in the interior; the protection pad 11 can protect the whole reverse helical blade 1 and the back of the connecting strip 2 from being abraded and corroded by ore pulp, so that the service life of the reverse helical blade is greatly prolonged, the times of disassembly and assembly are reduced, and the running cost of a mine is saved; in the production implementation, the counter bore 9 and the nut protection sleeve 12 are preferably provided with glue seals to further avoid the abrasion and corrosion of the slurry, so that the well-protected lock nut 8 can be disassembled and the replacement time can be saved.

The use of "first," "second," and similar terms in the description and in the claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a," "an," or "the" and similar referents do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprise" or "comprises", and the like, means that the element or item listed before "comprises" or "comprising" covers the element or item listed after "comprising" or "comprises" and its equivalents, and does not exclude other elements or items. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

While the preferred embodiments of the present invention have been described in detail, it is to be understood that the invention is not limited to the details of the foregoing description, since other embodiments may be devised without departing from the basic scope of the invention, and the scope thereof is determined by the claims that follow.