Ceramic roller sleeve of mill

Abstract

The utility model relates to the technical field of vertical mill accessories, in particular to a ceramic roller sleeve of a mill. Comprising a ceramic particle preform and a lining plate, high-chromium alloy is pressed into blind holes of the ceramic particle preform by adopting a liquid-state integral forming method, and certain infiltration pressure is kept, so that the high-chromium alloy and the ceramic particle preform are solidified and formed under the pressure; after a plurality of solidified and formed ceramic particle preforms are sequentially mounted in the grooves in the outer side wall of the lining plate, the plurality of ceramic particle preforms and the lining plate are cast and solidified into a whole through molten steel, and the molten steel can be infiltrated among ceramic particles of the ceramic particle preforms through the joint parts between the ceramic particle preforms and the lining plate; the ceramic roller sleeve wraps the ceramic particles, so that the ceramic phase and the metal phase are uniformly distributed, the wear resistance of the whole ceramic roller sleeve is greatly improved, the service life of the ceramic roller sleeve is prolonged, and the overhaul and maintenance cost of the vertical mill is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vertical mill accessories, in particular to a ceramic roller sleeve of a mill. Background Art

[0002] Vertical mill is an important equipment in the powder making system of cement and power industry. Ceramic roller sleeve is the key component of vertical mill and it is a consumable. Its life span directly affects the safe and stable operation of the production line.

[0003] At present, the ceramic roller sleeves of existing vertical mills are mostly made of high-chromium alloy welding wire. Once the coal quality changes significantly, there is a risk of wear-through after long-term use. At the same time, concave holes and furrows will appear on the surface, which will increase the power consumption of the vertical mill and significantly increase the vibration, resulting in multiple replacements of the roller sleeves, thereby increasing the inspection and maintenance costs of the vertical mill. Utility Model Content

[0004] The utility model aims to provide a ceramic roller sleeve for a mill, so as to solve the problem that the ceramic roller sleeves of vertical mills in the prior art are mostly made of high-chromium alloy welding wire, and once the coal quality changes greatly, there is a risk of wear-through after long-term use, and at the same time, concave holes and furrows will appear on the surface, which will increase the power consumption of the vertical mill and significantly increase the vibration, resulting in multiple replacement of the roller sleeves, thereby increasing the inspection and maintenance cost of the vertical mill.

[0005] To achieve the above-mentioned purpose, the utility model provides a ceramic roller sleeve of a grinding mill, which comprises a ceramic particle preform and a liner. The liner is sleeved on the outside of a grinding roller base of a vertical mill. The cross-section of the liner is arranged in a fan-shaped structure. A plurality of grooves are arranged on the outer wall of the liner, and the ceramic particle preform is arranged inside each of the grooves. A blind hole is arranged on the outer wall of each of the ceramic particle preforms, and a high chromium alloy is injected into the interior of each of the blind holes.

[0006] The material of the lining plate is a high chromium alloy, the material of the ceramic particle preform is ZTA ceramic particles, the particle size of the ZTA ceramic particles is between 1 and 1.5 mm, and the microhardness of the ZTA ceramic particles is between HV1400 and HV2100.

[0007] Wherein, the ceramic roller sleeve of the mill also includes a top reinforced cover plate and a bottom reinforced cover plate, the top reinforced cover plate is arranged at the top of the lining plate, a plurality of first clamping blocks are arranged at the bottom of the top reinforced cover plate, a first clamping groove is arranged at the top of each ceramic particle preform, and each first clamping block is respectively matched with one of the first clamping grooves, the bottom reinforced cover plate is arranged at the bottom of the lining plate, a plurality of second clamping blocks are arranged on the upper surface of the bottom reinforced cover plate, a second clamping groove is arranged at the bottom of each ceramic particle preform, and each second clamping block is respectively matched with one of the second clamping grooves.

[0008] Wherein, a first annular clamping block is further provided at the bottom of the top reinforcement cover plate, and a first annular clamping groove is further provided at the top of the lining plate, and the first annular clamping block is adapted to the first annular clamping groove.

[0009] Wherein, a second annular clamping block is further provided on the upper surface of the bottom reinforcement cover plate, and a second annular clamping groove is further provided on the bottom of the lining plate, and the second annular clamping block is adapted to the second annular clamping groove.

[0010] The utility model discloses a ceramic roller sleeve of a mill, comprising a ceramic particle preform and a liner. A liquid integral molding method is adopted to press a high chromium alloy into the blind hole of the ceramic particle preform, and a certain infiltration pressure is maintained so that the high chromium alloy and the ceramic particle preform are solidified and formed under pressure. After a plurality of solidified ceramic particle preforms are sequentially installed in the groove of the outer wall of the liner, the plurality of ceramic particle preforms and the liner are cast and consolidated into one body by molten steel. After the molten steel is cooled, the plurality of ceramic particle preforms and the liner form a complete whole. The molten steel can infiltrate between the ceramic particles of the ceramic particle preform through the joint between the ceramic particle preform and the liner, and wrap the ceramic particles, so that the ceramic phase and the metal phase are evenly distributed, thereby greatly improving the wear resistance of the entire ceramic roller sleeve, extending the service life of the ceramic roller sleeve, and reducing the overhaul and maintenance cost of the vertical mill. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 It is a structural schematic diagram of a ceramic roller sleeve of a grinding mill provided by the utility model.

[0013] Figure 2It is a front view of the ceramic roller sleeve of the grinding mill provided by the utility model.

[0014] Figure 3 It is a schematic diagram of the partially disassembled structure of the ceramic roller sleeve of the grinding mill provided by the utility model.

[0015] Figure 4 It is a schematic diagram of the split structure of the bottom reinforcement cover plate and the lining plate provided by the utility model.

[0016] 101-ceramic particle preform, 102-lining plate, 103-groove, 104-blind hole, 105-top reinforcement cover plate, 106-bottom reinforcement cover plate, 107-first card block, 108-first card slot, 109-second card block, 110-second card slot, 111-first annular card block, 112-first annular card slot, 113-second annular card block, 114-second annular card slot. DETAILED DESCRIPTION

[0017] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0018] See also Figures 1 to 4 The utility model provides a ceramic roller sleeve of a mill, which comprises a ceramic particle preform 101 and a liner 102. The liner 102 is sleeved on the outside of a grinding roller base of a vertical mill. The cross section of the liner 102 is arranged in a fan-shaped structure. A plurality of grooves 103 are arranged on the outer wall of the liner 102. The ceramic particle preform 101 is arranged inside each of the grooves 103. A blind hole 104 is arranged on the outer wall of each of the ceramic particle preforms 101. A high chromium alloy is injected into each of the blind holes 104.

[0019] In this embodiment, a liquid integrated molding method is used to press a high chromium alloy into the blind hole 104 of the ceramic particle preform 101, and a certain infiltration pressure is maintained so that the high chromium alloy and the ceramic particle preform 101 are solidified under pressure. After a plurality of solidified ceramic particle preforms 101 are sequentially installed in the groove 103 on the outer wall of the liner 102, the plurality of ceramic particle preforms 101 and the liner 102 are cast and consolidated into one by molten steel. When the molten steel is cooled, the plurality of ceramic particle preforms 101 and the liner 102 form a complete whole. The molten steel can infiltrate between the ceramic particles of the ceramic particle preform 101 through the joint between the ceramic particle preform 101 and the liner 102, and wrap the ceramic particles, so that the ceramic phase and the metal phase are evenly distributed, which greatly improves the wear resistance of the entire ceramic roller sleeve, prolongs the service life of the ceramic roller sleeve, and thus reduces the overhaul and maintenance cost of the vertical mill.

[0020] Furthermore, the material of the lining plate 102 is a high chromium alloy, the material of the ceramic particle preform 101 is ZTA ceramic particles, the particle size of the ZTA ceramic particles is between 1 and 1.5 mm, and the microhardness of the ZTA ceramic particles is between HV1 400 and HV2100.

[0021] Furthermore, the ceramic roller sleeve of the mill also includes a top reinforced cover plate 105 and a bottom reinforced cover plate 106. The top reinforced cover plate 105 is arranged at the top of the liner 102, and a plurality of first clamping blocks 107 are arranged at the bottom of the top reinforced cover plate 105. A first clamping groove 108 is arranged at the top of each of the ceramic particle preforms 101, and each of the first clamping blocks 107 is respectively matched with one of the first clamping grooves 108. The bottom reinforced cover plate 106 is arranged at the bottom of the liner 102, and a plurality of second clamping blocks 109 are arranged on the upper surface of the bottom reinforced cover plate 106. A second clamping groove 110 is arranged at the bottom of each of the ceramic particle preforms 101, and each of the second clamping blocks 109 is respectively matched with one of the second clamping grooves 110.

[0022] In this embodiment, by setting the first clamping block 107 and the first clamping groove 108, the top reinforcement cover plate 105 is installed on the top of the lining plate 102, and the top reinforcement cover plate 105 is clamped on the top of the plurality of ceramic particle preforms 101. By setting the second clamping block 109 and the second clamping groove 110, the bottom reinforcement cover plate 106 is installed on the bottom of the lining plate 102, and the bottom reinforcement cover plate 106 is clamped on the bottom of the plurality of ceramic particle preforms 101. After the preliminary installation of the top reinforcement cover plate 105 and the bottom reinforcement cover plate 106 is completed, the entire ceramic roller sleeve structure is cast and consolidated into one by molten steel. When the molten steel is cooled, the entire roller sleeve forms a complete whole. The molten steel can infiltrate into the structure of the entire ceramic roller sleeve through the joints between the top reinforcement cover plate 105 and the bottom reinforcement cover plate 106 and the ceramic particle preform 101 and the lining plate 102, thereby further improving the overall strength of the structure of the ceramic roller sleeve.

[0023] Furthermore, a first annular clamping block 111 is provided at the bottom of the top reinforcement cover plate 105 , and a first annular clamping groove 112 is provided at the top of the liner plate 102 . The first annular clamping block 111 is matched with the first annular clamping groove 112 .

[0024] In this embodiment, the top reinforcement cover plate 105 is more firmly installed on the top of the liner plate 102 by providing the first annular clamping block 111 and the first annular clamping groove 112 .

[0025] Furthermore, a second annular clamping block 113 is provided on the upper surface of the bottom reinforcement cover plate 106 , and a second annular clamping groove 114 is provided on the bottom of the liner plate 102 . The second annular clamping block 113 is matched with the second annular clamping groove 114 .

[0026] In this embodiment, the second annular clamping block 113 and the second annular clamping groove 114 are provided so that the bottom reinforcement cover plate 106 is more firmly installed on the bottom of the liner plate 102 .

[0027] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the utility model.

Claims

1. A ceramic roller sleeve for a grinding mill, characterized in that: It comprises a ceramic particle preform and a liner, wherein the liner is sleeved on the outside of a grinding roller base of a vertical mill, the cross section of the liner is arranged in a fan-shaped structure, a plurality of grooves are arranged on the outer side wall of the liner, the interior of each of the grooves is provided with the ceramic particle preform, the outer side wall of each of the ceramic particle preforms is provided with a blind hole, and the interior of each of the blind holes is injected with a high chromium alloy.

2. The ceramic roller sleeve of the grinding mill according to claim 1, characterized in that: The material of the lining plate is a high chromium alloy, the material of the ceramic particle preform is ZTA ceramic particles, the particle size of the ZTA ceramic particles is between 1 and 1.5 mm, and the microhardness of the ZTA ceramic particles is between HV1400 and HV2100.

3. The ceramic roller sleeve of the grinding mill according to claim 2, characterized in that: The ceramic roller sleeve of the mill also includes a top reinforcement cover plate and a bottom reinforcement cover plate. The top reinforcement cover plate is arranged at the top of the lining plate, and a plurality of first clamping blocks are arranged at the bottom of the top reinforcement cover plate. A first clamping groove is arranged at the top of each ceramic particle preform, and each first clamping block is respectively matched with one of the first clamping grooves. The bottom reinforcement cover plate is arranged at the bottom of the lining plate, and a plurality of second clamping blocks are arranged on the upper surface of the bottom reinforcement cover plate. A second clamping groove is arranged at the bottom of each ceramic particle preform, and each second clamping block is respectively matched with one of the second clamping grooves.

4. The ceramic roller sleeve of the grinding mill according to claim 3, characterized in that: A first annular clamping block is also provided at the bottom of the top reinforcement cover plate, and a first annular clamping groove is also provided at the top of the lining plate, and the first annular clamping block is matched with the first annular clamping groove.

5. The ceramic roller sleeve of the grinding mill according to claim 3, characterized in that: A second annular clamping block is also provided on the upper surface of the bottom reinforcement cover plate, and a second annular clamping groove is also provided on the bottom of the lining plate, and the second annular clamping block is matched with the second annular clamping groove.

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