Pile leaching ore crushing equipment

It should be clear that the investment and production costs of the crushing process depend mainly on the performance and price of the crushing equipment. The development and development of high-efficiency energy-saving crushing equipment is the common goal of the domestic and international smelting industry. In recent years, some new types of crushing equipment have appeared in China.

1. PEX series jaw crusher is based on PEX150×750 (produced by Shanghai Turin Machinery Co., Ltd.). It has the characteristics of high crushing, small discharge port, large production capacity, low price and convenient operation and maintenance. . Can be used as a typical equipment for two-stage crushing. For the daily treatment capacity of 100t, the ore particle size requirement is -15mm heap leaching field, the first section is equipped with a 250×400 jaw crusher , the second section is equipped with a 150×750 jaw crusher, and the second section is open. The final ore particle size of -15mm accounts for more than 85%.

The disadvantage of this type of crusher is that the discharge port is prone to uneven wear, resulting in short life and high consumption of the liner.

Second, SX300×500 double-action 颚 crusher This machine adopts double-action 颚, negative support, low suspension, small eccentricity, cross-angle, deep crushing cavity and high pendulum technology, so the crushing ratio is large (import-350mm, The minimum ore size of the ore discharge is -12mm), the energy consumption is low (22kW), and the liner has a long service life. If it is closed for a period of time, it can be broken to -12mm, and the processing capacity is small at 8t/h. For a heap immersion field with a daily processing capacity of 50 tons and a fine ore size, this equipment undoubtedly has its own unique advantages. If the ore particle size allows -20mm, the machine's production capacity can be increased to 20t / h. The 771 mine used this equipment and it worked very well.

Third, JU56 jaw crusher This machine is also a kind of high-efficiency crushing equipment with slight vibration and stable operation, suitable for mobile devices.

Fourth, φ600 ultra-fine broken disc cone crusher This machine is used as the second stage crushing equipment configuration. If open, 80% of the ore particle size can be controlled at -12mm. If closed, it can guarantee 100% ore particle size is -12mm, and it has a large processing capacity (100,000 tons per year). It has certain maintenance capacity and a long service life. The 400×600 jaw crusher is used. For a section of crushing, it is suitable to use the φ600 ultra-fine crushing cone crusher for the second section.

V. Features hammer crusher hammer crusher for crushing medium hardness (f = 6 ~ 8), containing a small amount of clay mineral raw materials, such as limestone, are generally mineral processing, metallurgical enterprises are rarely used in the main process line . However, since the hammer crusher itself has a sieve to ensure the size of the ore discharge, it is also preferable to use a hammer crusher as the second open crushing equipment for some types of ore. For example, the φ66 hammer crusher produced by Zhejiang Yiwu Mining Machinery Plant is used as the second section of fine crushing equipment to ensure the ore particle size is -10mm. Hammer crusher disadvantage is poor adaptability, easy to wear hammer, in particular hammers cast iron mass shorter lifetime.

Foreign crushing equipment has developed rapidly in recent years. First, a series of new fine crushing equipment has been developed. Second, the design of the crushing chamber of the existing crushing equipment has been improved.

In the fine crushing equipment, there is mainly a high-pressure roll crusher, which crushes the ore between two rotating rolls under a pressure of up to 300 MPa, and the gap width is adjusted by the hydraulic system, so that the crushing ratio is higher than that of the conventional pair of rolls. The machine is much larger and the product size is fine. According to the introduction, some products will produce tiny cracks, which will help the minerals to be fully exposed. The biggest advantage of this kind of equipment is that the unit energy consumption is low. When crushing quartz , its unit energy consumption is only 60% of the conventional. Another fine crushing device is called Rotopactor, which combines the principle of crushing and self-grinding to rotate the ore particles at high speed in a special mine rotor and then quickly vent to a turbulent mutual In the broken cavity, the impact energy in the ore-breaking cavity of the ore is 10 to 30 times larger than that of the conventional mill by the action of centrifugal force. The device has no wear, high crushing strength and low cost, and is generally used for fine or coarse grinding.

In the improvement of the existing crusher, the high-depth crushing chamber and the curved unobstructed point raft have been developed. For example, the Dyna jaw hydraulic jaw crusher produced in Japan has a feed of 1000mm, a discharge of 50-60mm, and a crushing ratio of 20: 1. For the improvement of the cone crusher, the upper feeder hole is enlarged, the crushing cavity is deepened, the parallel crushing zone is shortened, the number of moving cone swings is increased, and the gap of the discharge port is controlled. According to reports, the processing capacity of such new type of fine crusher can be increased by 21.5%, and the unit energy consumption is reduced by 30% to 40%.

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