The status quo and development characteristics of large-scale crushing equipment (1)

In recent years, domestically, there has also been progress in large-scale development. The more prominent one is the barrel mill, which has been able to manufacture the world's largest specifications. Large-scale gyratory crushers manufactured by ThyssenKrupp Fördertechnik, high-energy cone crushers such as Sweden Sandvik Group and Metso Finland, large roller presses from Krupp Hughes, Germany, large domestic and foreign Large-scale self-grinding (semi-self-grinding) machines and ball mills , such as Jaw Crusher and China CITIC Heavy Industry Machinery Co., Ltd., large hydro-cyclones such as Danish Aif Smith and large-scale regrind grinding mills It is a large-scale advanced equipment, representing the advanced technology level of the corresponding professional.

Most of the gyratory crushers are used in large mines, which determines the basic characteristics of their large equipment. Since the gyratory crusher is selected according to the required maximum feed size, its production capacity is generally quite rich, so no further enlargement is required. At present, the world's largest gyratory crusher is still a 63~114 〃 (1600~2896 mm) gyratory crusher manufactured by Fördertechnik in Germany in the 1990s. It was used in 1997 in a world-famous large mine. Iriana Jaya, Indonesia's Grasberg copper-gold mine, currently the standard equipment all over the world share the three.
Mature domestic application of the maximum size of the gyratory crusher is PX1400 NHI Shenyang Heavy Machinery Group Co., Ltd manufactured / 170 hydraulic gyratory crusher, the first piece of equipment in October 1985 for Benxi steel company Nanfen beneficiation plant. In the future, the equipment will still be used, and the equipment will be used by the China Gold Group Wunuuge Tushan Copper- Molybdenum Mine, which was completed and put into operation in 2009. In recent years, Hangzhou Shanhu Machinery Co., Ltd. has manufactured the PXZ-1600 heavy-duty hydraulic gyratory crusher, which is used in a stone material factory. It is currently the largest rotary gyratory crusher in China and is characterized by dual motor drive.

In 1955, the former Ural Heavy Machinery Plant of the Soviet Union produced a standard cone crusher of Ф3 000 mm and 400 kW. In the 1970s, Metso Nordberg produced the Φ3 048 mm Symons cone crusher. Since then, the large-scale cone crusher has stopped at this level, and the development direction has turned to high energy. High-energy is the main feature of the development of the international advanced cone crusher in the past 30 years, with the aim of achieving higher input energy and production capacity within a limited volume and quality. Under the guidance of this idea, the specifications of Hyundai International Advanced Cone Crusher are only maintained on the order of Φ2 000 mm, while the input energy or production capacity has been greatly improved, and the product granularity has been continuously reduced. The way of high energy is mainly to increase the size of the stressed parts, improve the material properties and improve the stressed structure.

The hydraulic cone crusher from Sweden's Sandvik Group and the HP series cone crusher from Metso Finland are representative of high energy. The largest-sized high-energy cone crusher, the MP1000 cone crusher manufactured by Nordberg in the 1980s, has a moving cone diameter of Φ2390mm and an installation power of 746 kW. The machine features hollow spindle, spherical tile supporting moving cone, slow cone, high swing frequency, large eccentricity, peripheral multi-cylinder hydraulic locking and advanced automatic control system.
At present, the largest cone crusher in the world is the MP1250 cone crusher manufactured by Metso Finland, with an installation power of 932.5 kW. Followed by the Raptor XL1100 cone crusher from the Irish company Alpha Smith Excell, also uses a hollow spindle structure. The maximum installed power is 895 kW, the maximum feed size is 620mm, and the production capacity can reach 2000t/h with the closed side discharge port of 35mm. Sweden's Sandvik Group's latest CH890 and CH895 are also among the world's largest equipment, with a mounting power of 746 kW. The former is used for the second stage of crushing and the latter is used for the third stage and gravel crushing. It features a single-cylinder hydraulic support at the bottom, a steep cone, a high swing frequency, a small eccentricity, a support frame for the main beam, a top star frame structure, and an advanced automatic control system.

The high-efficiency and energy-saving pulverizing equipment roller press, which is known as the principle of material layer pulverization, has been applied in large-scale metal mines, and the requirements for large-scale rolling presses have been put forward. In August 1995, ThyssenKrupp Hughes of Germany produced the world's largest Φ2.4×1.4 m POLYCOM® roller press for the Sierrita copper mine in Cyprus, USA. The installation power is 4 500 kW, the ore particle size is − 70 mm, the maximum pulverization force of the material is greater than 300 MPa, the product −250 μm content is 20% to 25%, and the average treatment capacity is 1 600 t/h. The company has also built four of the world's largest specifications of POLYCOM® 24/16-8, with a specification of Φ2.4×1.65 m and an installed power of 5,000 kW. It was used in the third section of the Peruvian Cerro Verde copper-molybdenum mine in 2006. broken. Subsequently, the Karara magnetite project jointly invested by Anshan Iron and Steel and Australia also selected two of these largest-sized roller presses as roughing machines.

Large roller crushers are generally not used to break metal ore due to the limitations of their roll life. In the late 1990s, Germany's ThyssenKrupp Fördertechnik produced the H-BRN20220 twin-roll crusher with a roller diameter of 2 m and a roll width of 2.2 m. Using two 400 kW motors, it is currently the largest in the world. Specifications of the roller crusher. The machine for RudnicPljevla northern Montenegro open coal mines, discharge particle size of 0 ~ 350 mm.

The jaw crusher can be used for both coarse and medium crushing, so its specifications vary widely. Before the 1980s, the first stage of large and medium-sized concentrators could only be used with jaw crushers when using jaw crushers. The final report on the advanced simple jaw crusher abroad was in the late 1980s. The US company Kue-Ken developed the 1 676 × 2 134 mm simple pendulum jaw crusher, which was used in 1991 in a quarry in Missouri. It was the largest jaw crusher in the United States in 25 years. It features external articulated high suspension, a small size flywheel and pulley, mechanical overload protection installed between the flywheel and the eccentric shaft, oil bath lubrication of the bracket system, unique hydraulic crushing chamber cleaning device and remote control device. Wait.
In recent years, with the development of design and manufacturing technology, foreign large-scale compound pendulum crushers have been able to completely replace the simple pendulum jaw crusher. Large and medium-sized concentrators using jaw crushers in China still mostly use simple pendulum jaw crushers, with a maximum size of 1 500 × 2 100 mm. The largest-scale compound pendulum jaw crusher in China is a PEY 1 500×1 800 mm hydraulic compound pendulum jaw crusher manufactured by Shanghai Jianlu Road Machinery Co., Ltd. in 2006, which is used to crush steel slag. The main feature of the machine is that two hydraulic cylinders are arranged side by side as a safety device after the traditional compound pendulum jaw crusher bracket. During normal operation of the crusher, the hydraulic cylinder provides sufficient crushing force to maintain the preset discharge opening. When the crushing chamber falls into the unbreakable object, the piston of the hydraulic cylinder retreats and the discharge opening opens to discharge the unbreakable material.

Digial Tire Gauge

NINGBO BLUEOCEAN AUTO PARTS CO.,LTD , https://www.blueoceanautoparts.com