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A concentrating plant treats ore 1500t per day. The crushing system has one PYB1200 cone crusher and one PYD1750 short-head cone crusher. The spherical bearing parts of the two crushers are equipped with rubber dust seals and in the bearing housing. The water inlet pipe and the drain pipe are welded on the upper side, and a water seal dustproof device is provided to prevent the dust from entering the spherical bearing to cause wear.
The original dustproof structure is shown below. Through years of use, this type of dustproof has the following disadvantages:
Since the moving cone is rotated 18 to 20 times/min with the rotation of the eccentric bushing when breaking, sometimes the synchronous speed with the eccentric bushing is as high as 300 r/min, so the rubber dust ring wears quickly.
When the gap between the dust-proof baffle of the moving cone and the rubber dust-proof ring is greater than 1.5-3.0 mm, a large amount of dust moves into the water-sealing device along the dust-proof baffle under the moving cone, clogging the water-sealing groove and the drain pipe, and depositing dust on the dust In the water seal tank.
When the pressure inside the clean water pipe is large, the water flows through the oil retaining ring from the spherical bearing return oil line into the oil tank. Therefore, it is necessary to frequently remove the water sealing device and replace the lubricating oil in the oil tank, which increases the labor intensity of the worker and causes A lot of waste.
Firstly, the water seal inlet pipe 10 and the drain pipe 1 in the above figure are removed, and then the annular water seal groove on the spherical bearing seat 2 is sealed with calcium-sodium grease, and the ball dustproof baffle 8 of the lower part of the crushing cone is used. And the calcium-sodium-based grease in the annular groove of the spherical bearing seat, the dust is blocked or adhered to the calcium-sodium-based grease by the rotation of the body, thereby blocking the dust from the spherical bearing seat.
It has been proven to be effective.
1) Water conservation: 2 cone crushers can save 116.6 tons of water every day, saving 31,482 tons of water every year, saving more than 80,000 yuan.
2) Increasing the amount of treated ore: Solving the problem that the dust often blocks the water sealing tank and the drain pipe, reducing the number of maintenance and prolonging the booting time. The two cone crushers process 490 tons of ore per month and treat the ore 4410t per year. Increase the benefits by more than 20,000 yuan.
3) Saving oil: After changing the dust-proof method, it solves the oil change phenomenon caused by the water entering the lubricating station. It can save 1620kg of lubricating oil every year and save more than 10,000 yuan.
4) Power saving: Due to the removal of the water sealing device, the startup time of the 2PNL vertical pump is reduced, saving 72,900 kW·h per year and saving electricity costs by more than 30,000 yuan.
In summary, the cost of the ore dressing plant can be saved by about 160,000 yuan per year.
Source: Mining machine optimization
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