Ball mill liner assembly and installation method thereof

Abstract

A ball mill liner assembly and installation method thereof; the ball mill liner assembly comprises wear-resistant liners (1), installation modules (3) and self-fixing liners (2); the self-fixing liners are made of ductile materials such as carbon steel or low-carbon alloy steel; the wear-resistant liners are integrally made of ceramic material; self-fixing liners are installed between a plurality of wear-resistant liners, and installation modules made of low-carbon alloy steel are used adjacent to the self-fixing liners.

Claims

1. A ball mill liner assembly for a drum of a ball mill, comprising a plurality of units, each of which comprises a wear-resistant liner, a self-fixing liner, an installation module, a first lug boss and a second lug boss, wherein the self-fixing liner is arranged with screw holes and configured to be fixed to the drum, wherein the wear-resistant liner is integrally made of ceramic materials, and the self-fixing liner is made of ductile materials, wherein in each of the unit one side of the installation module is in contact with one side of the first lug boss, another side of the first lug boss is in contact with one side of the self-fixing liner, another side of the self-fixing liner is in contact with one side of the second lug boss, another side of the second lug boss is in contact with one side of the wear-resistant liner to form an installation module>lug boss>self-fixing liner>lug boss>wear-resistant liner sub-assembly which is further assembled into the ball mill liner assembly fitted into a ball mill drum.

2. The ball mill liner assembly according to claim 1, further comprises a hard gasket in each of the units, wherein the hard gasket is disposed between the installation module and the first lug boss in the sub-assembly.

3. The ball mill liner assembly according to claim 1, wherein the self-fixing liner is arranged with screw holes.

4. The ball mill liner assembly according to claim 1, wherein the self-fixing liner is arranged with the first lug boss, which has oblique angles or circular arcs at both sides along the axial direction of the ball mill.

5. The ball mill liner assembly according to claim 1, wherein the installation module is made of low-carbon alloy steel or steel plates.

6. The ball mill liner assembly according to claim 1, wherein the ductile material is carbon steel or low-carbon alloy steel.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is the product profile of the invention;

(2) FIG. 2 is the structure diagram of the self-fixing liner;

(3) FIG. 3 is the stereoscopic structure diagram of the wear-resistant liner of the invention;

(4) FIG. 4 is the inner side structure diagram of the wear-resistant liner.

DETAILED DESCRIPTION OF PARTICULAR EMBODIMENTS OF THE INVENTION

(5) The technical scheme of the invention is further described combined with the attached drawings, but it shall not be construed as the restriction to the invention:

(6) FIG. 1 is the product structure diagram of the invention. A ball mill liner assembly, fitted into the ball mill drum, comprising wear-resistant liners 1, self-fixing liners 2 and installation modules 3. Combined with FIG. 3 and FIG. 4, the wear-resistant liner 1 is shaped in a circular arc adapted to the inner wall of the ball mill drum, it is integrally made of ceramic materials, the side fitted to the inner wall of the drum is a smooth surface or a hollow surface, while the other side is the working face. The working face is integrally in the shape of waves distributed along the circumference of the drum and a plurality of grooves 11 for guiding the movement of the mill balls are uniformly arranged along the axial direction of the drum; the self-fixing liner 2 is made of low-carbon alloy steel, as shown in FIG. 2, the self-fixing liner 2 may have screw holes 21, the self-fixing liner 2 is fixed onto the ball mill drum by matching the bolts and the existing screw holes of the ball mill drum, the bolts are only service bolts, the service bolt is an industry term meaning that the bolt is only used to facilitate the installation without any action on the working state of the liner, i.e., without any fastening effect after completion of installation, the bolt may be removed or reserved in the drum and operated along with the mill; a plurality of self-fixing liners 2 are fully uniformly arranged on the circumference of the ball mill drum 5 upwards at intervals, a group of wear-resistant liners 1 and installation modules 3 are filled between two adjacent self-fixing liners 2, the self-fixing liners 2 and wear-resistant liners 1 are arranged with two lug bosses 7 to form the lug boss ends at the same direction end face along the circumference of the drum, their sides opposite to the lug boss ends are planes; a side of the installation module 3 is connected with the plane end of the wear-resistant liner 1, the self-fixing liner 2 is connected with the end of the wear-resistant liner 1 with the lug boss 7, the lug boss end of the self-fixing liner 2 is fitted against the other side of the installation module 3; the wear-resistant liner 1 and the self-fixing liner 2 form two-point extrusion contact connection with each adjacent self-fixing liner 3 and installation module 3 through each lug boss end, thus enabling firm matching between the liners; a hard gasket 6 is arranged between each self-fixing liner 2 and installation module 3 through interference insertion, thus enabling adequate extrusion contact among the wear-resistant liner 1, the self-fixing liner 2 and the installation module 3 and preventing the gasket 6 of the installation module 3 from damaging the self-fixing liner 2 due to interference extrusion.

(7) An installation method of ball mill liner assembly, comprising the following steps to: firstly use the self-fixing liners to divide the drum into several areas properly along the circumferential direction of the ball mill drum and utilize the existing screw holes of the ball mill drum to fix the self-fixing liners; place the wear-resistant liner 1 into the self-fixing liner division area in the ball mill drum circumferentially; place the installation module 3 above the lug boss on the self-fixing liner 2, enabling it to contact the end of the self-fixing liner 2 with the lug boss and contact the end of the wear-resistant liner 1 without the lug loss; insert an iron wedge into the gap between the self-fixing liner 2 and the installation module 3 and hammer the iron wedge to fasten the liners at both sides along the circumferential direction; meanwhile, insert the gasket 6 into the gap between the self-fixing liner 2 and the installation module 3 to realize tight fit among the liners in the whole area; then withdraw the iron wedge.

(8) The benefit of the invention is as follows: the invention uses ceramic materials to replace metal, adjusts the gradation of the mill ball of the ball mill properly and enables the ceramic liner to work on the ball mill firmly and reliably. The service life of ceramic liners can reach 4-6 times of that of metal liners, which greatly improves the production efficiency of the enterprises and reduces the production costs. Since the ceramic density is only 38.5% of metal density, the weight of the whole liner only accounts for about 40% of the metal liner. Application of ceramic liners can reduce the operating energy consumption of ball mills. In the cement industry, application of ceramic materials can prevent metal pollution of metal liners and improve the quality of cement. In the production process, ceramic liners can eliminate the environmental pollution such as waste sand and exhaust arising from production of traditional metal liners, reduce the production energy consumption greatly and meanwhile avoid consumption of much metal and expensive alloy elements to a great extent. Application of ceramic materials will reduce the national environment and energy costs greatly. In addition to improving the production efficiency of the enterprise greatly, the invention will also bring huge economic benefits and save resources. The invention adopts the installation method of ball mill liner assembly to tightly fit the liners effectively and prevent the ceramic liners from breakage during pressing.

(9) The embodiments of the invention are described in details combined with the attached drawings, but the invention is not limited to above embodiments and may have various changes within the knowledge scope of a person skilled in the art provided that such changes don't deviate from the aim of the invention.