Problems with raw material crushing and grinding systems

Former small-scale beneficiation plant crushing mill ore particle size, about 25mm, which makes greatly reduced grinding efficiency of the mill. Since the mill is a fine grinding device, the grinding efficiency of the 25 mm (mm) ore is less than 80 micrometers (um) when the coarse crushing efficiency of the mill is low. At this time, 1 ton of medium-hard ore needs to consume electricity at about 25KWH dryer equipment. The advanced crushing process has broken the ore to a particle size below 10mm. At this time, the power consumption of the mill grinding 1 ton of ore is only about 13KWH. The method is to add a fine crusher on the crude crushing system of the raw material, so that the particle size of the ore before the mill is reduced from 25 mm to 10 mm, and the crushing of 1 ton of ore by the fine crusher requires a power consumption of 5 KWH to the roller machine. Instead of finely crushing the ore with fine crushing equipment before grinding, the power consumption of 1 ton of ore in the two systems of crushing and grinding can be reduced by 7KWH. Moreover, the consumption cost of the hammer head liner consumed by the fine crushing equipment before grinding is significantly lower than that of the ball mill steel ball and the liner consumption cost compound fertilizer production line. A concentrating plant that processes 100,000 tons of ore per year can use advanced technology in the crushing and grinding process to save electricity and materials consumption by 400,000 yuan.

Choose energy-saving, high-yield crushing equipment

There are many fine crushing equipments for ore, and the ideal equipment that users can choose is less. According to the main users, the consumption of the hammer and liner in the crusher is frequent, the replacement is frequent, the output is low, and the power consumption is high. Maintenance and maintenance are difficult, the time is long, and the equipment operation rate is low. For example, the hammer crusher , whether it is a vertical shaft hammer crusher or a horizontal hammer crusher, has a short service life of the hammer head. The shortest one is replaced once every three or five days, and the longest one is replaced once every two months. . The consumption of hammerhead and lining plate requires 1 yuan for 1 ton of ore. The power consumption of 1 ton ore is 7KWH impact crusher. Here, they recommend to the user an energy-saving bearing cone with low consumption of wear parts, long use time, high output, stable discharge size and low power consumption. The power consumption can be reduced from other crusher 7KWH/ton ore to 5KWH/ Tons of ore. The service life of the lining consumables can be increased from one week to half a year, and the wear-resistant steel such as liners and hammers consumed by crushing 1 ton of ore is about 0.2 kg/ton of ore, which drops to 0.01 kg/ton of ore, and drops nearly 20 times. Double the mobile crusher. For details of the equipment, please refer to the instruction manual of the energy-saving bearing cone crusher .

Choose energy-saving, high-yield grinding equipment

1, the general type grinding mill to use on the market today, the main bearings are pasteurized alloy pad bearing large running resistance, high fuel consumption, with a large mill bearings need lubrication station, maintenance difficulties, grinding 1 The electricity consumption per ton of ore is about 25 kWh (KWH); now the rolling bearing used in the main bearing of energy-saving ball mill, the power consumption of grinding 1 ton of ore is about 18KWH cone crusher. It is lubricated with dry oil and saves more than 80% of lubricating oil annually. The large-scale mill removes the lubrication station of the main bearing, and only needs to be repaired once a year. The equipment operation rate can reach 100% cement production process.

2. The lining plate of the ordinary ball mill adopts strip shape, step shape and large wave type. The disadvantage of these lining boards is that when the lining plate is worn to a certain thickness, it will be bent and deformed, resulting in failure to use; The disadvantage is that the surface shape of the lining plate is simple, the contact area between the steel ball and the lining plate is small, the grinding ability is insufficient, and the grinding efficiency is low, so that the output of the mill is low. It is recommended that the user adopt a double U-shaped lining. The advantage of this lining is that there is ripple along the circumferential direction of the mill barrel; there is a groove dryer device along the axis of the mill. When the mill is in operation, the grinding body is lifted to a high height, and the contact surface with the lining plate increases the grinding efficiency, and the lining plate has an output of more than 6% than the ordinary grinding machine.

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