A new type of split slag slurry pump ceramic lining

Abstract

The utility model relates to a novel split type slag slurry pump ceramic lining, the lining includes water outlet part, second quadrant booster area, third quadrant booster area, fourth quadrant booster area and front guard board area, wherein the water outlet part is located in the pump body export end and the pipeline connection, second quadrant booster area is located in the right side of pump cavity, and is spliced through the primary and secondary type hasp with water outlet part, third quadrant booster area is located below the pump cavity, and is connected with second, fourth quadrant booster area through the primary and secondary type hasp, fourth quadrant booster area is located in the left side of pump cavity, and is connected with third quadrant booster area and front guard board area through the primary and secondary type hasp. The utility model's wear resistance and tenacity improve obviously, through the primary and secondary hasp and sealant design prevent the ore pulp penetration, and the lining drop rate reduces, the lining average life increases, and the annual replacement frequency reduces, and the annual operation and maintenance cost reduces, can adapt to high concentration and high flow rate harsh working condition, and is compatible with ultrahigh pressure scene simultaneously, and the applicability is wider.

Description

Technical Field

[0001] This utility model relates to the technical field of slurry pump equipment, and more specifically, to a novel ceramic liner for a split-type slurry pump. Background Technology

[0002] Ceramic slurry pumps are core equipment in solid-liquid conveying systems in industries such as mining, metallurgy, and chemicals. Their linings come into direct contact with high-hardness slurries containing quartz sand, iron ore particles, etc., and must simultaneously meet the dual requirements of high wear resistance and structural stability. Currently, the mainstream lining materials in the industry are divided into two categories: Metal linings such as high-chromium cast iron have good toughness but poor wear resistance and are easily corroded by slurry. Their average lifespan is usually less than 2 months and they need to be replaced frequently. Ceramic lining: mainly composed of alumina and zirconia composite sintered ceramics, which have better wear resistance than metals, but suffer from insufficient hardness (Vickers hardness HV 1200-1500) and poor toughness (fracture toughness KIC 3-4 MPa·m). 1 / 2 Its defects make it prone to cracking under strong impact conditions.

[0003] As mining progresses towards deeper and harder ores, the content of hard particles in the slurry increases significantly, making the short lifespan of traditional ceramic linings increasingly prominent. The closest existing technology to this invention is a composite sintered ceramic lining with localized silicon carbide reinforcement, whose technical features and shortcomings are as follows: Technical features: The main body is made of composite sintered ceramic with an Al2O3 content of 85%-92% and a thickness of 25-35mm. Only the reaction sintered silicon carbide liner is pasted in the pump cavity tongue area. The splicing method is straight seam splicing and epoxy resin adhesive sealing, without mechanical locking structure. Core flaw: Insufficient material properties: The composite ceramic has limited wear resistance, the silicon carbide in some areas does not fully utilize its performance advantages, and the overall impact resistance is poor; Joint failure: Straight seam joints are susceptible to slurry penetration, leading to adhesive aging, failure of the buffer layer between the lining and the metal shell, and lining detachment rate of 10%-15%; Poor lifespan and economic efficiency: The overall average lifespan is only 2-4 months, the labor time for a single replacement is more than 8 hours, and the overall operation and maintenance cost of the equipment is high. Utility Model Content

[0004] In view of the problems in related technologies, this utility model proposes a novel split-type ceramic liner for slurry pumps to overcome the aforementioned technical problems existing in the existing related technologies.

[0005] Therefore, the specific technical solution adopted by this utility model is as follows: The inner lining is made of a composite system of reaction-sintered silicon carbide (SiC) and chopped carbon fiber. Specific parameters are as follows: Raw material selection: Reaction-sintered SiC with a purity >98%, has wear resistance 2-3 times that of traditional composite ceramics and is resistant to pH 2-12 slurry corrosion; Short-cut carbon fiber with a volume fraction of 3%-5% and a length of 1-3mm enhances toughness through fiber bridging effect; Sintering process: High-temperature sintering at 1400℃±20℃, holding time 2-3 hours, sintering atmosphere is inert gas to ensure material density, with a bulk density >3.0 g / cm³. 3 ; Performance specifications: Vickers hardness HV 2080-2250, volumetric wear rate <0.05 cm 3 / (N·m), fracture toughness KIC6-7 MPa·m 1 / 2 .

[0006] The liner includes an outlet, a second quadrant pressurization zone, a third quadrant pressurization zone, a fourth quadrant pressurization zone, and a front guard plate area. The outlet is located at the pump body outlet end and connects to the pipeline. The second quadrant pressurization zone is located on the right side of the pump chamber and is spliced ​​with the outlet via a snap fastener. The third quadrant pressurization zone is located below the pump chamber and is connected to the second and fourth quadrant pressurization zones via snap fasteners. The fourth quadrant pressurization zone is located on the left side of the pump chamber and is connected to the third quadrant pressurization zone and the front guard plate area via snap fasteners. The snap fastening direction of the snap fasteners is consistent with the mainstream fluid flow direction in the pump chamber, and the contact surface of the snap fasteners is provided with silicone rubber sealant.

[0007] Hook and loop fastener types and directions: divided into quadrant hook and loop fasteners, used for quadrant unit splicing and cavity and front guard plate hook and loop fasteners, used for cavity and front guard plate splicing. All hook and loop fasteners are aligned with the main flow direction of the fluid in the pump cavity to ensure that the hook and loop fasteners are pressed tightly when the fluid is flushed. Fastener dimensions: The female fastener groove depth is 8-10mm, the male fastener protrusion height matches the groove, the fitting gap is ≤0.5mm, the fastener width is equal to the inner lining thickness, and a seamless transition is formed after splicing; Sealing aid: Apply high-temperature resistant silicone rubber sealant to the contact surface of the snap fastener to block the slurry penetration path.

[0008] Overall assembly: The modular inner liner units are spliced ​​together with hook and loop fasteners to ensure that the fit gap is ≤0.5mm; after the splicing is completed, a composite pad is set between the outer side of the inner liner and the metal shell of the pump body to form a three-layer structure of metal shell, composite pad and wear-resistant inner liner, which improves the overall cushioning performance.

[0009] The beneficial effects of this utility model are: Compared with existing composite ceramics and local silicon carbide straight seam splicing technology, this utility model significantly improves wear resistance and toughness; the interlocking and sealant design prevents slurry penetration and reduces the lining detachment rate; the average life of the lining is increased, the number of annual replacements is reduced, and the annual operation and maintenance costs are lowered; it can be adapted to harsh working conditions with high concentration and high flow rate, and is also compatible with ultra-high pressure scenarios, making it more widely applicable. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the overall structure of a novel split-type slurry pump ceramic liner according to an embodiment of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of a novel split-type slurry pump ceramic liner according to an embodiment of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the overall structure of a novel split-type slurry pump ceramic liner according to an embodiment of the present invention. Figure 3 ; Figure 4 This is a schematic diagram of the assembly structure of the present invention with the pump body metal shell and composite pad.

[0012] In the picture: 1. Outlet; 2. Second quadrant pressurization zone; 3. Third quadrant pressurization zone; 4. Fourth quadrant pressurization zone; 5. Front guard plate area; 6. Inter-quadrant snap fastener; 7. Snap fastener between cavity and front guard plate; 8. Metal shell; 9. Composite pad layer; 10. Liner. Detailed Implementation

[0013] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the drawings are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0014] Please refer to the instruction manual appendix. Figure 1-4According to an embodiment of this utility model, a novel split-type ceramic liner for a slurry pump includes a water outlet 10, a second quadrant pressurization zone 2, a third quadrant pressurization zone 3, a fourth quadrant pressurization zone 4, and a front guard plate zone 5. The water outlet 1 is located at the pump body outlet end and connected to the pipeline. The second quadrant pressurization zone 2 is located on the right side of the pump cavity and is spliced ​​with the water outlet 1 by a snap fastener. The third quadrant pressurization zone 3 is located below the pump cavity and is connected to the second and fourth quadrant pressurization zones by a snap fastener. The fourth quadrant pressurization zone 4 is located on the left side of the pump cavity and is connected to the third quadrant pressurization zone 3 and the front guard plate zone 5 by a snap fastener. The snap fastening direction of the snap fastener is consistent with the mainstream fluid direction in the pump cavity, and the contact surface of the snap fastener is provided with silicone rubber sealant.

[0015] The liner 10 is made of a reaction-bonded silicon carbide and chopped carbon fiber composite system, with the chopped carbon fiber having a volume fraction of 3%-5%, and the composite system is sintered under inert gas protection at 1400℃±20℃; the length of the chopped carbon fiber is 1-3mm, the purity of the reaction-bonded silicon carbide is >98%, and the bulk density of the composite system is >3.0 g / cm³. 3 .

[0016] The inner liner 10 is modularly divided based on the flow rate and pressure distribution of the fluid in the pump chamber. The high-pressure area is the third quadrant pressurization zone 3, and its inner liner thickness is 2-3 mm thicker than other areas.

[0017] The inter-quadrant ...

[0018] The depth of the female buckle groove of the hook and loop fastener is 8-10mm, the gap between the male buckle protrusion and the female buckle groove is ≤0.5mm, and the width of the hook and loop fastener is equal to the thickness of the inner lining 10.

[0019] The silicone rubber sealant has a high temperature resistance of up to 200°C.

[0020] A composite pad 9 is provided between the outer side of the liner 10 and the metal shell 8 of the pump body, forming a three-layer structure of metal shell, composite pad and liner.

[0021] Material alternatives: By replacing reactive sintered silicon carbide with atmospheric pressure sintered silicon carbide, and adjusting the sintering process to 1600℃±30℃ with a holding time of 4-5h, similar hardness and wear resistance (HV 2000-2200) can be achieved, which is suitable for production scenarios without reactive sintering equipment. Replacing short-cut carbon fiber with glass fiber, and adjusting the volume fraction to 5%-7%, can reduce costs, but the improvement in toughness is slightly lower (KIC 5-6 MPa·m). 1 / 2 It is suitable for low to medium impact conditions.

[0022] Alternatives to the snap fastener structure: Using wedge-shaped hooks instead of traditional hooks and loops, with a wedge angle of 15°-20° and the hook direction still aligned with the fluid flow direction, achieves the same anti-slip effect and is easier to install. A metal reinforcing edge, made of stainless steel and 1-2mm thick, is added to the joint and embedded on the outside of the buckle to further enhance the joint strength. It is suitable for ultra-high pressure (pump outlet pressure > 1.6 MPa) conditions.

[0023] Alternative solutions for segmentation: Instead of velocity-pressure zoning, the slurry wear volume is divided into zones. High wear areas, such as the tongue area and the impeller outlet area, are identified through wear tests. The inner lining is thickened by 42-45mm in these areas, while other areas remain at 40mm. This allows for more precise matching of wear requirements.

[0024] Compared with existing composite ceramics and local silicon carbide straight seam splicing technology, this utility model significantly improves wear resistance and toughness; the interlocking and sealant design prevents slurry penetration and reduces the lining detachment rate; the average life of the lining is increased, the number of annual replacements is reduced, and the annual operation and maintenance costs are lowered; it can be adapted to harsh working conditions with high concentration and high flow rate, and is also compatible with ultra-high pressure scenarios, making it more widely applicable.

[0025] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A novel ceramic liner for a split-type slurry pump, characterized in that: The liner (10) includes an outlet (1), a second quadrant pressurization zone (2), a third quadrant pressurization zone (3), a fourth quadrant pressurization zone (4), and a front guard plate zone (5). The outlet (1) is located at the pump body outlet end and connected to the pipeline. The second quadrant pressurization zone (2) is located on the right side of the pump chamber and is spliced ​​with the outlet (1) by a snap fastener. The third quadrant pressurization zone (3) is located below the pump chamber and is connected to the second and fourth quadrant pressurization zones by a snap fastener. The fourth quadrant pressurization zone (4) is located on the left side of the pump chamber and is connected to the third quadrant pressurization zone (3) and the front guard plate zone (5) by a snap fastener. The snap fastening direction of the snap fastener is consistent with the mainstream direction of the fluid in the pump chamber, and the contact surface of the snap fastener is provided with silicone rubber sealant.

2. The novel split-type slurry pump ceramic liner according to claim 1, characterized in that: The inner liner (10) is modularly divided based on the flow rate and pressure distribution of the fluid in the pump chamber. The high-pressure area is the third quadrant pressurization zone (3), and its inner liner thickness is 2-3 mm thicker than other areas.

3. The novel split-type slurry pump ceramic liner according to claim 1, characterized in that: The inter-quadrant ...

4. The novel split-type slurry pump ceramic liner according to claim 1, characterized in that: The depth of the female buckle groove of the hook and loop fastener is 8-10mm, the gap between the male buckle protrusion and the female buckle groove is ≤0.5mm, and the width of the hook and loop fastener is equal to the thickness of the inner lining (10).

5. The novel split-type slurry pump ceramic liner according to claim 1, characterized in that: The silicone rubber sealant has a high temperature resistance of up to 200°C.

6. The novel split-type slurry pump ceramic liner according to claim 1, characterized in that: A composite pad (9) is provided between the outer side of the liner (10) and the metal shell (8) of the pump body, forming a three-layer structure of metal shell, composite pad and liner.

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