First, commonly used maintenance lifting equipment
(1) Fixed tackle (ie manual hoist)
The fixed block is a fixed-point lifting device. It needs to be fixed on the bracket or the beam when needed. It can only be used for upper and lower one-way movement; the maximum lifting capacity can reach 20t, it can flow service, but the lifting speed is too slow, which is commonly used in tape conveying. Lifting and repairing the tail of the machine head and the plate feeder.
(2) Electric block (also known as electric hoist)
The electric trolley can lift heavy objects for up and down movement, and can also be assembled on a single track for forward and backward movement to form two-way operation at the same time. The lifting weight can reach 10t, generally 2~5t. When installing, the hoist track must be aligned with the equipment. Centerline to facilitate smooth vertical lifting of the parts. The device is simple and flexible to operate, the service line can be long or short, and can be straight and bendable, but its bending radius must meet the required value of the minimum radius of curvature.
(3) Bridge cranes (also called bridge cranes)
Respectively, by a bridge crane lifting mechanism, bridge crane trolley and driving composition, can be used for the vertical, lateral, longitudinal movement of the three-way, service interval, widely used in the mineral processing plant. According to the structure and transmission mode of the bridge crane, it is divided into single beam, double beam, manual and electric. When selecting specifically, it depends on factors such as plant span, required lifting height, lifting tonnage, number of equipment, working system and special requirements.
The manual single girder crane is a light bridge type lifting device, which is suitable for use when the lifting tonnage is less than 10t and the span is less than 17m, and the maintenance task is not heavy.
The electric single-beam crane has a lifting tonnage of less than 10t. Due to electric power, it has a fast working speed and is suitable for use in heavy maintenance tasks.
The difference between the electric double girder bridge crane and the single girder crane is that it adopts a complicated double girder truss and has a large lifting capacity of more than 100t. Those with a lifting weight of 15t or more are equipped with main and auxiliary double hooks, and the span can reach more than 30m.
The electric bridge grab crane is used for concentrate loading and loading. The lifting weight can reach 20t, and the span can reach 31.5m. When the ball mill is loaded, the magnetic bridge crane can be used.
The maintenance system for the overall lifting of the equipment is not often used in the design. The reason is that the tonnage of the crane is too large, the structure of the plant is complicated, and the construction cost is increased, which does not necessarily save maintenance time. Therefore, the tonnage of the inspection crane is generally considered in terms of the maximum size of the equipment being repaired or the weight of the largest part that is difficult to disassemble.
Second, the determination of the tonnage of maintenance crane
The tonnage of the crusher maintenance crane depends on the weight of the heaviest repair parts that are difficult to disassemble, such as the pulley of the jaw crusher , the combination of the flywheel and the movable shaft; the cone of the cone crusher (including the spiral); the grinding machine does not Consider the overall lifting of the equipment, and the grinding machine with a diameter of Ñ„ 2.7m or more should be equipped with a grinding machine jack lifting device (hydraulic jack) to support the grinding machine cylinder, so that the required crane tonnage is small; the spiral classifier should meet the overall lifting The spiral body; the tonnage of the flotation machine is generally considered according to the weight of the tank. When the number of units is small, the tonnage can be determined according to the weight of the impeller body; the tonnage of the cylinder magnetic separator should be determined according to the weight of the cylinder, and the shp magnetic machine should be based on the sorting plate. The weight is determined by Ñ„2000mm, the strong magnetic ring can be bridge crane; the filter maintenance crane is generally determined by the simplified weight. When the number of filter machines is less than 2, the tonnage can be determined according to the weight of the wind head, and the manual or electric hoist can be selected; The maintenance is carried out as a whole. The tonnage and type selection of cranes for equipment maintenance in the concentrator are as follows. [next]
Reference table for tonnage and type selection of cranes for equipment maintenance of mineral processing plant
Equipment name and specification (mm) | crane | |||
Tonnage/t | Types of | Remarks | ||
Jaw Crusher | 250×400 400×600 600×900 900×1200 1200×1500 1500×2100 | 2 3 10 15/3~20/5 30/5 50/10 | Manual monorail, manual single beam Manual monorail, manual single beam Electric single beam, electric bridge Electric bridge Electric bridge Electric bridge | |
Rotary crusher | 500 700 900 1200 1400 | 10 15/3~20/5 30/5 75/20 100/20 | Electric single beam, electric bridge Electric bridge Electric bridge Electric bridge Electric bridge | |
Cone crusher | 600 900 1200 1750 2200 | 1 2~3 5 10 15/3~20/5 | Manual monorail, manual single beam Manual single beam, electric single beam Electric single beam Electric single beam, electric bridge Electric single beam, electric bridge | |
Vibration move screen | SZZ1250×2500, 1500×3000, SZZ121250×2500 SZ1250×2500, 1500×3000, SZ21250×2500 SZZ21250×4000, 1500×3000, 1500×4000 SZZ1500×4000, 1800×3600, SZZ21800×3600 SZ21500×3000, YA1236 2YA1236, 1542, YA1542, 1548, 1842 3YA1548, 1842 | 1 1 2 2 2 3 3~5 | Manual monorail, manual single beam Manual monorail, manual single beam Manual monorail, manual single beam Manual monorail, manual single beam Manual monorail, manual single beam Manual monorail, manual single beam Electric single beam | |
Wet ball mill | 900×900, 900×1800 1200×1200, 1200×2400, 1500×1500 1500×3000 2100×2200, 2100×3000 2100×4500, 2700×2100, 2700×2700 2700×3600, 2700×4000 3200×3100, 3200×3600, 3200×4500, 3200×5400 3600×4500, 3600×6000, 3600×4000 | 1 2 3 5P 10 15/3 20/5 30/5 | Manual single beam Manual single beam, electric single beam Manual single beam, electric single beam Electric single beam Electric bridge Electric bridge Electric bridge Electric bridge | Charged disk The secondary hook is electromagnetic and hook The secondary hook is electromagnetic and hook The secondary hook is electromagnetic and hook |
Wet self-grinding machine | 4000×1400 5500×1800 7500×2500, 7500×2800 | 10 30/5 50/10 | Electric bridge Electric bridge Electric bridge | |
Spiral classifier | FG-Ñ„750 FG-Ñ„1200, 1500, 2FGÑ„1500, FC-Ñ„1200 2FC-Ñ„1200 FG-Ñ„2000, 2FG-Ñ„2000, PC-Ñ„1500 2FC-Ñ„1500 FG-Ñ„2400, 2FG-Ñ„2400, FC-Ñ„2000, 2FG-Ñ„2000 2FG-Ñ„3000, FC-Ñ„2400, 2FC-Ñ„2400, 2FC-Ñ„3000 | 2 5 5 10 10 15/3 20/5 | Manual monorail, manual single beam Electric hoist, electric single beam Electric hoist, electric single beam Electric hoist, electric single beam Electric hoist, electric single beam Electric bridge Electric bridge | |
Permanent magnet magnetic separator | 600600×900, 600×1800, 750×1200 750750×1800 101050×800, 1050×1500, 1050×1800 101050×2100, 1050×2400, 1200×3000 | 1 2 3 5 | Manual monorail, manual single beam Manual monorail, manual single beam Manual monorail, manual single beam Electric hoist, electric single beam | |
Strong magnetic magnetic double-machine flat ring | Shop500 Shop1000 Shop2000 Shop3200 | 15 5 10~15/3 20/5 | Manual single beam, electric single beam Manual single beam, electric single beam Electric bridge Electric bridge | |
Flotation machine | XJ-3 XJ-6, XJ-11 XJ-28, XJC-40 XJ-58, XJC-80, CHF-X14 | 0.5 Electric single beam 3 5 | Electric single beam Electric single beam Electric single beam | |
Filter | GW-3, GP-27 GW-5, GYW-8, GYW-12, disc type 40m2, 10m 2 outside the cylinder GN-8, GN-12, GW-20, disc type 60m2, disc type 120m 2 GN-10, GN-30, GN-40, GW-30, GW-40, GW-50 | 2 3 5 10 | Electric single beam Electric single beam Electric single beam Electric bridge | |
Plastic ash slag, pump sand pump | 4PNJ.5PNJ, 6PNJ, 4PH, 6PW, 8PW 2 and 2 points PS, 4PS, PS 8PSJ, 6PH 10PSJ 8PH | 1 1 2 3 5 | Manual monorail and electric hoist can be selected for each tonnage Electric single beam | |
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